Systems and methods of transmitting channel state information

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to a channel state information (CSI) feedback method. A transmitter transmits a frame containing at least part of determined CSI. CSI is fed back in a very-high throughput (VHT) wireless communication system.

EFFECT: high data channel throughput, determining CSI parameters based on information included in a request.

73 cl, 34 dwg, 3 tbl

 

[0001] the present application claims priority of the provisional application for U.S. patent No. 61/387,542, filed September 29, 2010, provisional application for U.S. patent No. 61/389,495, filed October 4, 2010, provisional application for U.S. patent No. 61/422,098, filed December 10, 2010, provisional application for U.S. patent No. 61/432,115, filed January 12, 2011, provisional application for U.S. patent No. 61/405,194, filed October 10, 2010, and provisional application for U.S. patent No. 61/409,645, filed November 3, 2010, the full contents of which are incorporated here in full by reference.

The technical field TO WHICH the INVENTION RELATES

[0002] Some aspects of the present invention generally relate to wireless communications and, more specifically, to methods of transmitting information channel state information (CSI).

The LEVEL of TECHNOLOGY

[0003] With the aim of addressing the issue of increasing bandwidth requirements the bandwidth required for wireless communication systems, developed various schemes to allow multiple user terminals to communicate with a single access point by sharing the channel resources, resulting in high bandwidth data transmission channels. Technology systems with multiple-input multiple-output (MIMO) represents one such approach that has recently emerged in Kutch�as popular methods for next generation communication systems. MIMO technology has been applied in several emerging wireless standards such as 802.11 Institute of electrical and electronics engineers (IEEE). IEEE 802.11 denotes a set of air interface standards for wireless local area network (WLAN), developed by the IEEE 802.11 Committee for short-range communications (e.g., from tens of meters to several hundred meters).

[0004] a MIMO System employs multiple (NT) transmitting antennas and multiple (NR) receiving antennas for data transmission. A MIMO channel formed of NTtransmitting antennas and NRreceiving antennas may be decomposed into NSindependent channels, which are also referred to as spatial channels, whereNSmin{NT,NR}. Each of NSindependent channels has a corresponding size. The MIMO system can provide improved performance (e.g., higher throughput and/or greater reliability) if you use the extra dimension created by multiple transmitting and receiving antennas.

[0005] In wireless networks with a single access point (AP) and multiple user stations (STA) simultaneous transmission can �proishodit multiple channels to different stations, in the direction as ascending and descending lines of communication. In such systems, there are a lot of problems.

Summary of the INVENTION

[0006] Some aspects of the present description provide a method of wireless communication. The method includes receiving request information of the channel state. Method contains the definition of the parameter information of the channel state on the basis of information included in the request. Method includes definition of the information channel state information based, at least in part, of certain parameters. The method includes the transmission of a frame containing at least a part of a particular information channel state.

[0007] Some aspects of the present description provide a device for wireless communication. The apparatus comprises a receiver configured to receive request information of the channel state. The apparatus comprises a data processing system, configured to determine the parameters with the channel state on the basis of information included in the request, and information to determine channel state information based, at least in part, of certain parameters. The device comprises a transmitter configured to transmit the frame containing at least a part of a particular information channel state.

[0008] Some aspects of the present description �reductivist device for wireless communication. The device contains a means of receiving the information request link-state. The device comprises a means of determining the parameters of information of the channel state on the basis of information included in the request. The device comprises a means of determining the state information of the channel based, at least in part, of certain parameters. The device comprises a means of transmission of a frame containing at least a part of a particular information channel state.

[0009] Some aspects of the present description provide a computer program product for wireless communication, containing machine-readable media containing commands. Team when the initiate reception of device information request link-state. Team when the trigger definition device settings information of the channel state on the basis of information included in the request. Team when the trigger determination by the device information of the channel state information based, at least in part, of certain parameters. Team when the initiate transfer device of the frame containing at least a part of a particular information channel state.

[0010] Some aspects of the present description provide for the access terminal. The access terminal comprises at least one antenna. Terminalista contains the receiver configured to receive via at least one antenna information request link-state. The access terminal includes a processing system configured to determine parameters of information of the channel state on the basis of information included in the request, and information to determine channel state information based, at least in part, of certain parameters. The access terminal includes a transmitter configured to transmit the frame containing at least a part of a particular information channel state.

[0011] Some aspects of the present description provide a method of wireless communication. The method includes the transmission request information of the channel state information to one or more devices, wherein the request includes a field identifying each of one or more devices and identifying parameters for each of one or more devices to be used in determining the information state of the channel. The method includes receiving a frame containing information channel state information from at least one of the one or more devices in response to the request, wherein the status information of the channel was determined based, at least in part, of the parameters specified in the request.

[0012] Some aspects of the present�General description provide a device for wireless communication. The device comprises a transmitter configured to transmit the request information, channel state information to one or more devices, wherein the request includes a field identifying each of one or more devices and identifying parameters for each of one or more devices to be used in determining the information state of the channel. The apparatus comprises a receiver configured to receive the frame containing the state information of the channel from at least one of the one or more devices in response to the request, wherein the status information of the channel was determined based, at least in part, of the parameters specified in the request.

[0013] Some aspects of the present description provide a device for wireless communication. The device comprises a means of transmitting request information of the channel state information to one or more devices, wherein the request includes a field identifying each of one or more devices and identifying parameters for each of one or more devices to be used in determining the information state of the channel. The device contains a means of receiving the frame containing the state information of the channel from at least one of the one or more at�devices, in response to the request, wherein the status information of the channel was determined based, at least in part, of the parameters specified in the request.

[0014] Some aspects of the present description provide a computer program product for wireless communication, containing machine-readable media containing commands. Operations initiate the transmission of device information request channel state information to one or more devices, wherein the request includes a field identifying each of one or more devices and identifying parameters for each of one or more devices to be used in determining the information state of the channel. Team when the trigger receiving device of the frame containing the state information of the channel from at least one of the one or more devices in response to the request, wherein the status information of the channel was determined based, at least in part, of the parameters specified in the request.

[0015] Some aspects of the present description provide an access point. The access point comprises at least one antenna. The access point includes a transceiver configured to communicate via at least one antenna information request link-state to oznamuje multiple devices, in this case, the query contains a field that identifies each of one or more devices and identifying parameters for each of one or more devices to be used in determining the information state of the channel. The access point comprises a receiver configured to receive the frame containing the state information of the channel from at least one of the one or more devices in response to the request, wherein the status information of the channel was determined based, at least in part, of the parameters specified in the request.

BRIEF description of the DRAWINGS

[0016] So that the manner in which the above described characteristics of the present invention, can be understood in detail, more particular description, briefly described above, may be offered by reference to aspects, some of which are illustrated in the attached drawings. It should be noted, however, that the appended drawings illustrate only certain typical aspects of this invention and therefore should not be considered as limiting of its scope, for the description may admit to other equally effective aspects.

[0017] Fig. 1 illustrates a network diagram of a wireless communication in accordance with some aspects of the present invention.

[0018] Fig. 2 illustrates a block diagram of �dimernoi access point and user terminals in accordance with some aspects of the present invention.

[0019] Fig. 3 illustrates a block diagram of an exemplary wireless device in accordance with some aspects of the present invention.

[0020] Fig. 4 illustrates an aspect of the Protocol feedback information channel state information (CSI).

[0021] Fig. 5 illustrates an aspect of the NDPA frame.

[0022] Fig. 6A-Fig. 6C illustrate aspects of the STA information field.

[0023] Fig. 7A-Fig. 7C illustrate aspects of the STA information included in the STA information field illustrated in Fig. 6A-Fig. 6C.

[0024] Fig. 8 illustrates an aspect of the NDPA frame.

[0025] Fig. 9A and Fig. 9B illustrate aspects of package management.

[0026] Fig. 10 illustrates an aspect of package management.

[0027] Fig. 11 illustrates an aspect of communication-report CSI for transmission of CSI feedback.

[0028] Fig. 12A-Fig. 12E illustrate aspects of the management field for feedback sensing.

[0029] Fig. 13 illustrates an aspect of an access point.

[0030] Fig. 14 illustrates an aspect of the method of transmission.

[0031] Fig. 15 illustrates an aspect of the method of transmission.

[0032] Fig. 16 illustrates an aspect of the method of transmission.

[0033] Fig. 17 illustrates an aspect of the access terminal.

[0034] Fig. 18 illustrates an aspect of the method of transmission.

[0035] Fig. 19 illustrates an aspect of the method of transmission.

[0036] Fig. 20 illustrates an aspect of the method of transmission.

[0037] Fig. 21 illustrates an aspect of the method of transmission.

[0038] the Fi�. 22 illustrates an aspect of the method of transmission.

[0039] Fig. 23 illustrates an aspect of the method of transmission.

[0040] Fig. 24 illustrates an aspect of the method of transmission.

[0041] Fig. 25 illustrates a block diagram of an exemplary user terminal in accordance with some aspects of the present invention.

DETAILED DESCRIPTION

[0042] Various aspects of the invention further described more fully with reference to the accompanying drawings. The invention may, however, be implemented in many different forms and should not be construed as limited to any specific structure or function of this invention. On the contrary, these aspects are provided so that the invention will be comprehensive and complete and will fully convey the scope of the invention to specialists in this field of technology. Based on the ideas presented here, the specialist in the art should understand that the scope of the invention is not intended to cover every aspect of the invention presented here are implemented independently or in combination with any other aspect of the invention. For example, the device may be implemented or a method may be implemented using almost any number of points presented here. In addition, the scope of the invention is intended to cover such devices�tvo or method, that is applied using other structure, functionality, or structure and functionality in addition to various aspects of the invention set forth herein, or unlike them. It should be understood that any aspect of the invention, disclosed herein may be implemented using one or more elements of the claims.

[0043] Although particular aspects are described here, many variations and permutations on these aspects is within the scope of the invention. Although some useful properties and advantages of the described aspects are mentioned, the scope of the invention is not intended to be limited to particular benefits, use cases or goals. On the contrary, aspects of the invention are intended to be broadly applicable to different wireless technologies, system configurations, networks, and transmission protocols, some of which are illustrated by way of example in the drawings and the following description of aspects. Detailed description and the drawings only illustrate the invention and not limit it.

EXEMPLARY WIRELESS COMMUNICATION SYSTEM

[0044] the Techniques described here can be used for various broadband wireless communication systems, including communication systems, based on the scheme of orthogonal multiplexing. P�emery of such communication systems include systems multiple access with spatial division multiplexing (SDMA), multiple access with time division multiplexing (TDMA), multiple access orthogonal frequency division multiplexing (OFDMA), multiple access frequency division channels and transmission on a single carrier (SC-FDMA), etc. SDMA System can use enough different directions to simultaneously transmit data belonging to multiple user terminals. A TDMA system may allow multiple user terminals to share the same frequency channel by dividing the transmission signal into different time intervals, each time interval is allocated for an user terminal. The TDMA system can use GSM or some other standards known in the art. The OFDMA system utilizes orthogonal frequency division multiplexing (OFDM) is a modulation technique aimed at the division of the total bandwidth of the system on orthogonal subcarriers. These subcarriers may also be referred to as tones, beans, etc. In OFDM, each subcarrier can be independently modulated with data. The OFDM system may use IEEE 802.11 or some other standards known in the art. System SC-FDMA can use alternating FDMA (IFDMA) to exercise gear� on subcarriers which are distributed across the width of the bandwidth of the system, localized FDMA (LFDMA) to transmit on a block of adjacent sub carriers, enhanced FDMA (EFDMA) to transmit on multiple blocks of adjacent subcarriers. In General, modulation symbols are sent in the frequency domain with OFDM and in the time domain with SC-FDMA. System SC-FDMA can use 3GPP-LTE (Standard long-term development partnership Project third generation) or other standards.

[0045] the Ideas presented here can be applied to multiple wired or wireless devices (e.g., nodes) (e.g., implemented within a device or made them). In some aspects a wireless node, implemented in accordance with the ideas presented here may contain an access point or access terminal.

[0046] the access Point ("AP") may contain, be implemented as, or known as NodeB, radio network controller ("RNC"), eNodeB, base station controller ("BSC"), base transceiver station ("BTS"), base station ("BS"), the functional unit priemoperedachy ("TF"), radiomaster, radio transceiver, basic service set ("BSS"), extended service set ("ESS"), base station ("RBS") or some other terminology.

[0047] the access Terminal ("at") may contain, be implemented or known�n as the access terminal, subscriber station, subscriber unit, mobile station, remote station, remote terminal, user agent, user device, user equipment, a user station or some other terminology. In some embodiments, the implementation, the access terminal may include a cellular phone, cordless phone, telephone Protocol session initiation ("SIP"), station wireless local loop radio ("WLL"), a personal digital assistant ("PDA"), handheld device having wireless connection capability, a station ("STA") or any other suitable processing device connected to a wireless modem. Accordingly, one or more aspects studied here, can be implemented in relation to the phone (e.g. cell phone or smartphone), a computer (e.g., laptop), a portable communication device, a portable computing device (e.g. personal digital assistant), an entertainment device (e.g., a music or video device, or a satellite radio), the device's global positioning system on the ground or any other suitable device that is configured to communicate via a wireless or wired medium. In some aspects the node yavl�is a wireless node. Such wireless node may provide, for example, connectivity for or to a network (e.g., a global network such as the Internet or a cellular network) via a wired or wireless communication lines.

[0048] Fig. 1 illustrates the system 100 with many inputs and many outputs (MIMO) access points and user terminals. For simplicity of description in Fig. 1 shows only one point 110 access. The access point is in General fixed station that communicates with user terminals and may also be referred to as a base station or some other term. The user terminal may be stationary or mobile and may also be referred to as a mobile station or a wireless device or some other term. Point 110 may communicate with one or more user terminals 120 at any given time in the descending and ascending lines. Downward communication line (i.e., a direct communications link) is a communication line from the access point to the user terminal, and the upward communication line (return line) is a line of communication from the user terminals to the access point. The user terminal may also conduct peer-to-peer communication with another user terminal. System to�of troller 130 connects to the access points and provides them with coordination and control.

[0049] while the following disclosure will describe user terminals 120 capable of communication through multiple access with spatial division multiplexing (SDMA), in respect of some aspects of the user terminals 120 may also include some user terminals that do not support SDMA. Thus, in some aspects, the AR 110 may be configured to communicate with SDMA terminals and non-SDMA terminals. This approach can easily allow older versions of user terminals (stations "previous generation") that do not support SDMA, continue to be used at the enterprises, increasing the term of their useful lives, thus giving a more modern user SDMA-terminals to be introduced as deemed appropriate.

[0050] the System 100 includes multiple transmitting and multiple receiving antennas for data transmission in the descending and ascending lines. This point 110 access includeNapantennas and represents the multiple-input (MI) for transmissions in the downlink and multiple output (MO) for transmission in uplink. Set To choos�tion of the user terminals 120 together represents multiple output for transmission on downlink transmission via uplink. For pure SDMA, it is desirable thatNapK1if the streams of data symbols for the K user terminals are not multiplexed in code, frequency or time in any way. It can be moreNapif the streams of data symbols may be multiplexed using TDMA techniques, different code channels with CDMA, disjoint sets of subbands with OFDM, and so on. Each selected user terminal may transmit a special user data to the access point and/or to take them from her. In General, each selected user terminal may be equipped with one or multiple antennas (i.e.Nut1). To the selected user terminals can have the same number of antennas, or one or more user terminals may have different number of antennas.

[0051] the SDMA System 100 may be a system for duplex communication with time division channels (TDD) or system duplex�th connection with the channel frequency division (FDD). As for the TDD system, the descending and ascending lines of communication share the same frequency band. As for the FDD system, the descending and ascending lines of communication using different frequency bands. The MIMO system 100 may also use a single carrier or multiple carriers for transmission. Each user terminal may be equipped with only one antenna (for example, in order to save costs) or multiple antennas (e.g., when additional costs acceptable). The system 100 may also be a TDMA system, if user terminals 120 share the same frequency channel by dividing the transmission/reception at various time intervals, where each interval can be allocated to another user terminal 120.

[0052] Fig. 2 illustrates a block diagram of the point 110 and two user terminals 120m and 120x in the MIMO system 100. Point 110 access includeNtantennas a-ar. User terminal 120m is equipped withNut,mantennas 252ma-252mu, and user terminal 120x is equipped withNut,x antennas 252xa-252xu. Point 110 access - object for transmitting downlink and the receiving object for uplink. User terminal 120, a transmit object for uplink and a receiving object for downlink. Here, the transmitting object" is an independently operated apparatus or device capable of transmitting data through a wireless channel, and "receiving facility" is an independently operated apparatus or device capable of receiving data through a wireless channel. In the following description, the subscript "dn" denotes the downward communication line, the subscript "up" denotes the upward communication line, Nupuser terminals are selected for simultaneous transmission on the uplink, and Ndnuser terminals are selected for simultaneous transmission on the downlink. Nupmay be equal to Ndnor may not be; and Nupand Ndncan be static values or can change for each scheduling interval. Position control beam or some other spatial processing technique can be used at the point 110 of the access and/or the user terminal 120.

[0053] On the uplink, at each user�d terminal 120, selected for transmission on the uplink, the TX-processor 288 (processor receiving data receives the data traffic from 286 source data and control data from a controller 280. TX-processor 288 data processes (e.g., encodes, alternates and modulates) traffic data for the user terminal based on the modulation schemes and coding associated with the rate selected for the user terminal, and provides a stream of data symbols. Spatial TX-processor 290 performs spatial processing of the stream of data symbols and outputsNut,mstreams of transmission symbols forNut,mantennas. Each transmitter unit (TMTR) 254 receives and processes (e.g., converts to analog form, amplifies, filters and converts with increasing frequency) corresponding to a stream of transmission symbols to generate a signal uplink.Nut,mtransducer blocks 254 issueNut,m the uplink signals for transmission fromNut,mantennas 252, for example, to transmit to access point 110 access.

[0054] Nupuser terminals may be scheduled for simultaneous transmission on the uplink communication. Each of these user terminals may perform spatial processing its respective stream of data symbols and a corresponding set of streams of symbols of the transmission on uplink to a point 110 access.

[0055] At the point 110 of the accessNapantennas a-or accept the uplink signals from Nupuser terminals transmitting on the uplink. Each antenna 224 provides the received signal to a respective receiver unit (RCVR) 222. Each receiver unit 222 performs processing in addition to the one performed by the transmitting unit 254 and outputs the received stream of symbols. Spatial RX processor 240 performs receiver spatial processingNaptaken� streams of characters from Napfoster blocks 222 and outputs Nuprestored streams of data symbols uplink. Spatial processing in the receiver can be performed in accordance with the inverse correlation matrix of the channel (CCMI), minimum mean square error (MMSE), soft interference suppression (SIC) or any other method. Each restored stream of data symbols uplink is an estimate of the stream of data symbols transmitted to the respective user terminal. RX processor 242 data processes (e.g., demodulates, eliminates interleaving and decodes) each recovered stream of data symbols uplink in accordance with the rate used for that stream to obtain decoded data. The decoded data for each user terminal may be provided to the receiver 244 data storage and/or the controller 230 for further processing.

[0056] On the downlink at the point 110 of the access TX-processor data 210 receives traffic data from the source data 208 for Ndnuser terminals that are scheduled for transmission in the downlink, the control data from the controller 230, and possibly other data�from a scheduler 234. Different types of data can be sent on different transport channels. TX-processor data 210 processes (e.g., encodes, interleaves, and modulates) the traffic data for each user terminal based on the transmission rate selected for that user terminal. TX-processor 210 of the data gives Ndnof streams of data symbols downlink for Ndnuser terminals. Spatial TX processor 220 performs spatial processing (such as pre-coding or beamforming) of streams of symbols of the downlink data and outputsNapstreams of transmission symbols forNapantennas. Each transmitting unit 222 receives and processes the corresponding character stream data to generate a downlink signal.Naptransducer blocks 222 can provideNapsignals downlink for transmission from Napantennas 224, for example, to transmit to the user terminals 120.

[0057] At each user terminal 120Nut,mantenna 252 receivesNapsignals downlink from the point 110 access. Each receiving unit 254 processes the received signal from the corresponding antenna 252 and outputs the received stream of symbols. Spatial RX processor 260 performs receiver spatial processingNut,mof received streams of characters fromNut,mfoster blocks 254 and outputs the restored stream of symbols of the downlink data to the user terminal 120. Spatial processing in the receiver can be performed in accordance with the CCMI, MMSE, or some other technique. RX processor 270 data processes (e.g., demodulates, eliminates interleaving and decodes) reconstructed� the character stream data uplink, to obtain decoded data for each user terminal.

[0058] At each user terminal 120 unit 278 of the channel estimation estimates the channel response of the descending lines of communication and give an estimate of the channel downlink, which may include evaluation of the gain of the channel estimation SNR, the variance of the noise and so on. Similarly, the block 228 channel estimation estimates the channel response uplink and outputs a channel estimation uplink. Controller 280 for each user terminal typically displays the spatial filter matrix for the user terminal based on the matrix of responses of the downward communication channel Hdn,mfor this user terminal. The controller 230 outputs a spatial filter matrix for the access point based on the matrix of effective responses of the upward communication channel Hup,eff. Controller 280 for each user terminal may send feedback information (e.g., eigenvectors downlink and/or uplink, eigenvalues, SNR estimates, etc.) to a point 110 access. Controllers 230 and 280 may also control the operation of various processing units at the point 110 of the access and the user terminal 120, respectively.

[0059] Fig. 3 illustrates various components that mo�ut to be used in the wireless device 302, which can be used in the communication system 100. Wireless device 302 is an example of a device that may be configured to implement various methods described herein. The wireless device 302 may be implemented as a point 110 access or the user terminal 120.

[0060] the Wireless device 302 may include a processor 304 that controls the operation of the wireless device 302. The processor 304 may also be referred to as the Central processing unit (CPU). Block memory 306, which may include both read only memory (ROM), and memory (RAM), issues commands and data to the processor 304. The part of the block memory 306 may also include non-volatile random access memory (NVRAM). The processor 304 may perform logical and arithmetic operations based on software commands stored in the block memory 306. Commands in the block memory 306 may be executable to implement the methods described herein.

[0061] the Processor 304 may include a processing system implemented with one or more processors, or be a component. One or more processors can be implemented in any combination of General-purpose microprocessors, microcontrollers, processors with digital�of galov (DSP), field programmable gate arrays (FPGA), programmable logic devices (PLD), controllers, state machines, gate logic, discrete hardware components, specialized finite state machine hardware, or any other suitable objects that can perform calculations or other manipulations of information.

[0062] the processing System may also include computer-readable media for storing software. The software will be interpreted broadly, to denote any type of command, whether referred to as software, firmware, middleware, microcode, hardware description language means one or the other. The team may include code (e.g., source code format, binary code format, executable code format, or any other suitable format of code). Commands, when executed by one or more processors, initiate the implementation of a system for processing various functions described herein.

[0063] the Wireless device 302 can also include a housing 308 that may include a transmitter 310 and a receiver 312 to provide the transmission and reception of data between the wireless device 302 and a remote location. Peredachi and receiver 312 may be combined into a transceiver 314. One or a plurality of transmit antennas 316 may be attached to the housing 308 and electrical means connected to the transceiver 314. The wireless device 302 may also include (not shown) multiple transmitters, multiple receivers, multiple transceivers.

[0064] the Wireless device 302 can also include a detector 318 signals that can be used when attempting to detect and quantify the level of signals received by the transceiver 314. The detector signals 318 may detect such signals as a signal of the total energy, the signal energy per subcarrier per symbol, the signal power spectral density and others. Wireless device 302 can also include a digital signal processor (DSP) 320 for use in signal processing.

[0065] the Various components of the wireless device 302 can be connected together by a system of 322 tires, which may include a power bus, bus control signals and bus signals of status in addition to the data bus.

[0066] In some aspects the wireless system 100 illustrated in Fig. 1, is operated in accordance with the wireless standard IEEE 802.11 ac. IEEE 802.11 ac reflects an amendment to IEEE 802.11, which implies a higher bandwidth wireless networks PT�of nderte IEEE 802.11. Higher throughput can be realized with the adoption of certain measures, for example, by using parallel transmissions to multiple stations (STA) immediately. In some aspects used increased bandwidth channel (e.g., 80 MHz or 160 MHz). The IEEE 802.11 ac standard is sometimes known as the standard for wireless very high throughput (VHT).

[0067] Certain aspects of the present invention supports a method with low utility costs for information transfer channel state information (CSI) or feedback. For example, such information may be transmitted between user terminals 120 and the point 110 of the access communication system 100. Some aspects of the present invention additionally support the packet formats for the alert about null data packet (the packet of zero data) (NDPA), a survey of CSI and CSI feedback. Some aspects of the support relationship specifying whether CSI be accepted and/or stored, for example, AR or in AR. This information can be used STA, for example, to determine whether to send further CSI and/or adjusting settings to see if the transmission of CSI. Some aspects of support for communication with remote indication, transmitted CSI, for example, through STA. This information can be used AR, for example, to determine how peredavat� requests requests for CSI and/or adjusting settings to see if the CSI request transmission. In some cases, the CSI feedback may be too large to be transmitted in the Protocol data unit (MPDU) control the medium access (MAC) or Protocol data unit (PPDU) physical layer (PHY). Some aspects of the present invention additionally support Protocol for segmentation of the CSI feedback. In the following description reference is made to a user station (STA). As described above, the STA may include a user terminal, user terminal 120 or the wireless device 302.

INFORMATION link-STATE

[0068] Fig. 4 illustrates an aspect of the Protocol 400 feedback in the form of information channel state information (CSI). Access point (AP) can transmit to one or more user stations (STA) frame 402 of warning about null data packet (NDPA), followed by the frame 404 of the null data packet (NDP) after a period of 406 short interframe symbol (SIFS). The frame 402 NDPA may contain Association identifiers (AID) of the STA that needs to transmit the calculated CSI feedback to the AP, as will be described in more detail below.

[0069] The STA that are not identified in the NDPA, can ignore the next frame 404 NDP. Frame 404 NDP may contain a frame sensing used by each STA to calculate the corresponding CSI feedback. The first STA, the decree�nnaya in the frame 402 NDPA, can transmit feedback CSI 408 after the SIFS period after transmission of the frame 404 NDP, as shown in Fig. 4. In some aspects, the feedback CSI 408 contains only part of the full CSI feedback for the first specified STA. For example, when the full CSI feedback too large to be transmitted in the data block, such as MPDU PPDU or part, is included in the feedback CSI 408, may be sufficiently small to transfer the block of data. In these aspects, the AR may send the survey CSI 412 to request an additional portion of the full CSI feedback from the first specified STA. The first indicated STA may then transmit another part, such as feedback CSI 414 in response to the survey CSI 412. This process of polling STA may continue until such time as all parts full CSI feedback will not be accepted.

[0070] In some aspects, the CSI survey can be sent by the AR to another STA specified in the NDPA frame to request another STA sending the CSI feedback. For example, if the first specified STA in the frame 402 NDPA shares his full CSI feedback in two parts - feedback 408 and 414 CSI, then AR may request another STA specified in the frame 402 NDPA, to start the transmission of the feedback CSI 418, which may be full CSI feedback or a part of the full CSI feedback, for another STA. Any number of STA can be identified in �Adra 402 NDPA, as discussed in more detail below, and AR may pass any number of CSI surveys and/or take any number of feedback signals CSI or its parts.

[0071] After the frame 402 NDPA transmitted, the AP may transmit the second frame 422 NDPA again to request CSI feedback. STA, from which use of the frame 422 NDPA receives a request for CSI feedback may be different than the STA from which use of the frame 402 NDPA receives a request for CSI feedback, or identical with them. The number of STA, from which by means of frames 402, 422 NDPA receives a request for CSI feedback may be equal or may vary.

[0072] In some aspects, the frame 422 NDPA is transmitted after CSI feedback was taken from all the STA identified in the frame 402 NDPA. In some aspects a frame 422 NDPA is transmitted in a certain period of time after the frame 402 NDPA, regardless of whether the CSI feedback is taken from all STA identified in the frame 402 NDPA. In some aspects a frame 422 NDPA is transmitted after the polling message, such as the CSI survey was sent to all STA identified in the frame 402 NDPA. In some aspects a frame 422 NDPA may identify one or more STA that are not identified in the frame 402 NDPA, or may identify a subset of the STA that is identified in the frame 402 NDPA. Thus, �R may request CSI feedback from STA with the frame 422 NDPA, still taking feedback from CSI STA identified in the frame 402 NDPA. In some aspects a frame 422 NDPA AR can be transmitted in response to some event, or transmission of the frame 422 NDPA can be initiated by action of the AR or other device.

[0073] Fig. 5 illustrates an aspect of NDPA frame, for example frame 422 NDPA. In some aspects a frame 422 NDPA may be cited as the request message CSI, which may belong to the type of personnel management. Frame 422 NDPA may contain one or more of the fields 502 human resource management, field 504 length field 506 RA broadcast field 508 TA, fields 512 sequence CSI, the information field 514 STA and field 516 CRC. Frame 422 NDPA may be transmitted or broadcast by means of AR, as described above. The frame 402 NDPA may be formatted or configured like a frame 422 NDPA.

[0074] In the illustrated aspect field 502 of personnel management contains 16 bits. Also illustrated in the aspect field 504 length contains 16 bits and may include the length of the frame 422 NDPA. Field 516 CRC in the illustrated aspect contains 32 bits and can contain data to identify the control using a cyclic redundancy code (CRC).

[0075] In the illustrated aspect of the field 506 RA broadcast contains 48 bits. Field 506 RA broadcast may include a broadcast/group adress multiple STA. For example, a field 506 RA broadcast may include a group address, where many STA belongs to this group. In this aspect, each STA may identify whether the addressing based on the address of the group. In other aspects of the field 506 RA broadcast may instead identify a single STA, for example, by indicating the MAC address of the desired STA. In some aspects of the field 506 RA broadcast may instead have a field DA (destination address), or named in this way.

[0076] In the illustrated aspect, the field 508 TA contains 48 bits. Field 508 THAT may include an address or identifier of the device transmitting the frame 422 NDPA, for example the address of the transmitting AP. In some aspects of field 508 TA may instead be stored in the SA (source address), or named in this way.

[0077] In the illustrated aspect, the field 512 sequence CSI contains 8 bits. Field 512 sequence CSI may contain the sequence number for the frame 422 NDPA or other identifier that uniquely identifies the frame 422 NDPA.

[0078] In the illustrated aspect, the length of the information field 514 STA may vary. Information field 514 STA may include information for each STA from which the request arrives CSI or such other information as feedback.

[0079] Fig. 6A-Fig. 6C illustrate the TSA�you STA information field. In the aspect illustrated in Fig. 6A, when a field 506 RA broadcast frame 422 NDPA identifies only one STA information field a STA will include information 602 only identified for this STA. In another aspect, illustrated in Fig. 6B and 6C, where the field 506 RA broadcast frame 422 NDPA contains a broadcast/multicast address for multiple STA, for example, information for each STA from which AR is requesting feedback will be included in the information field 514 STA. Fig. 6B AR CSI requests from 1-4 STA, and information 612-618 for each STA included in the information field 514b STA. Fig. 6C, the difference described above, AR queries CSI only from STA 5 and 6, and the information 622 and 624 is included in the information field s STA. In some aspects, a broadcast/multicast address or group address may be included in field 506 RA broadcast, but the information only for a single STA is included in the information field 514 STA. Thus, a broadcast/multicast address may be included in the frame 422 NDPA for ease of handling and/or uniformity, but the addressing is carried out to a single STA.

[0080] Fig. 7A-Fig. 7C illustrate aspects of the STA information included in the information field 514 STA. Any information 602-604 STA illustrated in Fig. 6A-Fig. 6C, can be formatted as illustrated in any of the f�G. 7A-Fig. 7C. As an example in Fig. 7 illustrates information 612 STA.

[0081] Information 612 STA may report settings for STA, the STA may be used to transmit CSI. In some aspects, the CSI returned by the STA, referred to as feedback sensing (SF). In these aspects of information STA 612 may include information about the data for STA to determine and/or calculate SF frame-based sensing, included in the NDP frame 404 illustrated in Fig. 4, for example. In some aspects of information STA 612 can be used to determine that there is no need to send SF or submit the form SF, which requires a smaller amount of data.

[0082] In the aspect illustrated in Fig. 7A, information a STA may contain one or more of the fields 702 AID, field 704 Nss, field 706 Ng, field 712 coefficients, field 714 codebook, field 722 last traded SF and fields 724 SF last saved. In some aspects of information a STA further comprises a reserved field 732, which includes bits in addition to those specified for fields 702-724 that can be used for any number of purposes. In some aspects of the field 702-732 are arranged in an order that differs from the order illustrated in Fig. 7A.

[0083] In the illustrated aspect field 702 AID contains 11 bits and can include AD. As described above, the AID may contain the identifier of the Association STA. AID can contain any data, or an identifier that uniquely identifies the STA. For example, the physical address, such as MAC address, may be included in AID. In some aspects each of the fields 704-724 may include information or data that specifies the parameters for the STA identified by field 702 AID, for use in calculating, determining, or generating CSI or SF.

[0084] In the illustrated aspect, the field 704 Nss comprises at least 3 bits. Field 704 Nss may reflect the number of spatial channels or streams (e.g. natural frequencies) CSI feedback that is subject to calculation in STA identified field 702 AID.

[0085] In the illustrated aspect field 706 Ng contains at least 3 bits. In some aspects of field 706 Ng contains at least 2 bits. Field 706 Ng may reflect the grouping of tones in which the STA identified by field 702 AID should generate CSI feedback. For example, the tones may correspond to subcarriers in the OFDM system.

[0086] In the illustrated aspect field 712 of coefficients comprises at least 3 bits. In some aspects of field 712 of coefficients contains one or more bits. Field 712 of the coefficients may reflect the size of the coefficient, which can corresponding chip mode� quantization, used by the STA identified by field 702 AID for records of the CSI matrix, as will be further described in more detail below. In some aspects of field 712 of the coefficients omitted. For example, NDPA 402 may indicate that CSI formatted into a concise feedback, in this case, the size of the coefficient may not be enabled.

[0087] In the illustrated aspect field 714 codebook comprises at least 3 bits. In some aspects of field 714 codebook contains one or more bits. Field 714 codebook may reflect quantization on corners that STA identified field 702 AID should be used for SF.

[0088] In the illustrated aspect field 722 last traded SF contains at least 1 bit. Field last traded SF may reflect whether SF AR from STA identified field 702 AID, after sending the previous frame NDPA. For example, in the aspect discussed with reference to Fig. 4, the frame 402 NDPA was transferred to several STA to request information of the channel state. The second STA is identified in the frame 422 NDPA, who gave feedback CSI 418. In the frame 422 NDPA, if the field 702 AID in information a STA identifies the second STA, box 722 last traded SF may reflect whether the AR feedback CSI 418. For example, the last traded SF can be set to 0 if return� link 418 CSI was not adopted, and can be set to 1, if the feedback CSI 418 was adopted. In other aspects, these values can be distributed in the opposite way. In some aspects of field 722 last traded SF is used as confirmed by recent feedback sensing, which carried out the survey of AR.

[0089] In some aspects of the field last traded SF contains at least 8 bits and may include a sequence number. In this aspect, the last adopted SF reflects the sequence number corresponding to the last transmitted CSI feedback. For example, the frame 422 NDPA illustrated in Fig. 5, includes a sequence number for the frame 422 NDPA or other identifier that uniquely identifies the frame 422 NDPA in field 512 sequence CSI. If SF is adopted in response to the frame 422 NDPA from STA - in some aspects of SF includes a sequence number or other identifier - following the NDPA frame may include a sequence number or other identifier in a field last traded SF information STA, STA identifying, which was adopted SF.

[0090] Information channel state information transmitted by the STA that may not be accepted AR a variety of different reasons. For example, data conflicts, interference in the communication channel or natural obstacles - all this may prevent is�the implementation of the communication such as receiving CSI feedback, or to reduce the probability that the CSI feedback will be definitely adopted. In some aspects, even in situations when the AR receives the CSI from the STA, the last SF will be configured to indicate that the CSI feedback was not accepted, if the feedback CSI cannot be accurately decoded or processed.

[0091] Field 722 last traded SF may be used by STA identified field 702 AID, for any number of purposes. For example, if the STA gave SF in response to the frame 402 NDPA, but the field 722 last traded SF indicates that SF was not adopted by the AP, the STA may determine that an error has occurred during transmission. In response, the STA may retransmit the previous SF. As another example, if the STA is not conveyed SF in response to the frame 402 NDPA, but the field 722 last traded SF indicates that SF was adopted, the STA may determine that the adopted SF erroneous, and can communicate with the AP, giving the command to AR eliminated adopted by the SF.

[0092] In some aspects of field 722 last traded SF can be used to adjust the send rate SF. For example, when a field 722 last traded SF indicates that SF was not adopted, although STA gave SF, STA can reduce PHY-rate to send the next SF. Similarly, when a field 722 last traded SF indicates that the previously transmitted�nye SF was successfully adopted, STA can improve PHY-rate to send the next SF. Thus, the speed of sending SF can continuously be adjusted or tuned to improve performance. In some aspects other parameter or characteristic, in addition to transmission speed, can be adjusted based on whether the previous SF duly adopted. For example, modulation to send SF can be changed, if the previous SF was not adopted properly.

[0093] In some aspects STA adjusts the transmission rate only after receiving the duly SF series or after incorrect reception of the SF series. For example, the STA may increase the transmission rate after receiving a certain number of NDPA frame having a field last traded SF, which reflects that SF was duly adopted. In some aspects, if the SF series had not been adopted properly, for example, as indicated fields last adopted in CSI series NDPA frame, the STA communicates with the AP to indicate that the AR should refrain from sending any additional requests for CSI. Thus, the network resources consumed during the transmission of the NDPA to STA can be saved when it turns out that the AR does not take from CSI STA properly.

[0094] In some aspects, the transmission speed used by the STA to send feedback probe�of duplication, is determined based on the speed of transmission of the polling messages. For example, the transmission rate for sending the survey 416 CSI in the aspect illustrated in Fig. 4, can be used to send feedback 418 CSI. As another example, the transmission rate for sending the survey CSI 416 may be adjusted upward or downward on the basis of whether adopted by previous SF field as indicated last traded SF, for example.

[0095] Returning to the description of information a STA illustrated in Fig. 7A, it should be noted that the field 724 SF last saved contains at least 1 bit. Field 724 SF last saved may indicate that AR kept SF last adopted by the STA identified field 702 AID. Thus, in some aspects of the field 724 SF last saved may indicate that, if kept AR SF, adopted by the STA after sending the previous frame NDPA. For example, in the aspect discussed with reference to Fig. 4, the frame 402 NDPA was transferred to several STA to request information of the channel state. The second STA identified in the frame 422 NDPA, gave feedback CSI 418. In the frame 422 NDPA, if the field 702 AID in information a STA identifies the second STA, the field 724 SF last saved may indicate that, if kept AR feedback CSI 418. For example, last saved field SF can be �mounted on a value of 0, if the feedback CSI 418 has not been saved, and can be set to 1, if the feedback CSI 418 was saved. In other aspects, these values can be distributed in the opposite way.

[0096] In some aspects of the field last saved SF contains at least 8 bits and may include a sequence number. In this aspect last saved field SF reflects the sequence number corresponding to the last transmitted CSI feedback. For example, the frame 422 NDPA illustrated in Fig. 5, includes a sequence number for the frame 422 NDPA or other identifier that uniquely identifies the frame 422 NDPA in field 512 sequence CSI. If SF, adopted by the STA was stored after the frame 422 NDPA - in some aspects of SF includes a sequence number or other identifier - following the NDPA frame may include a sequence number or other identifier in field SF last saved information STA, STA identifying, which was adopted SF.

[0097] Information channel state information transmitted to the STA, may not be stored AR a variety of different reasons. For example, when CSI was not adopted or was adopted incorrectly, CSI cannot be stored by AR. In some aspects, however, even duly adopted by the CSI could not be maintained. For example, AR may not have sufficient�about memory, to store the CSI. As another example, the AP may determine that will not store CSI after a specific period of time after the request CSI or after a specified period of time from the moment when CSI was defined STA. Thus, the CSI may be "expired" and could not be maintained. In some aspects of AR can delete saved CSI, which has become "stale." During transmission of the next NDPA AR may designate in the box to the last saved SF for the STA that has transmitted the remote CSI that CSI has not been saved.

[0098] Box 724 SF last saved may be used by STA identified field 702 AID for any number of purposes. For example, if the STA gave SF in response to the frame 402 NDPA, but the field 724 SF last saved indicates that SF was not saved AP, the STA may retransmit the previous SF.

[0099] as another example, if the field 724 SF last saved indicates that the previous SF was saved, and the STA determines that the channel for which CSI is requested, has changed by an amount which is less than the threshold, or determines that the CSI has changed by an amount which is less than the threshold, the STA may determine that the stored current CSI and CSI in General the same, and may not send any CSI in response to the frame 422 NDPA. In such circumstances, the STA may instead contact AR, labeling, �no CSI is not transmitted, for example, as described below. Pass CSI can contribute to the conservation of network resources and improve the transmission speed and/or reliability of communications within the network.

[0100] In some aspects, when the field 724 SF last saved indicates that the previous SF was saved, the STA may transmit information indicating the difference between SF and saved the current SF. In some aspects of the full CSI feedback may include a matrix or data pointing to it. In some aspects, the matrix contains many frequencies, singular vectors or singular values. As described above, the STA may determine a spatial filter matrix based on the matrix of responses of the downward communication channel Hdn,mfor this STA. Information feedback (e.g., eigenvectors downlink, eigenvalues, SNR estimates, and so on) can, thus, be transmitted to, for example, AR. Thus, the information of channel state and/or SF can be reflected in the form of a matrix. In some aspects the difference between the previous SF current SF may also be reflected in the form of a matrix. The matrix difference, however, may require fewer bytes to display. Thus, sending the difference instead of full CSI CSI may also contribute to the conservation of network resources.

[0101] In some aspects, when a field 722 last adopted� SF indicates, that last SF in respect of which AR carried out the survey, had not been adopted, field 724 SF last saved will always point to the fact that the AR didn't keep the last SF, which was carried out the survey. For example, when a field 722 last traded SF and box 724 SF last saved are used in the form of bits, as described above, the field 724 last saved SF will always have a value of 0 when the field 722 last traded SF has a value of 0. In other aspects, when a field 722 last traded SF indicates that the last SF in respect of which AR carried out the survey, had not been adopted, field 724 SF last saved may be used to indicate that the previously stored SF is still stored AR. For example, when a field 722 last traded SF and box 724 SF last saved are used in the form of bits, as described above, and field 722 last traded SF is set to 0, the field 724 SF last saved may be set to 1 to indicate that the previously stored SF is still stored and can be changed to 0 to indicate that the previously stored SF has been removed or that is requested SF new full.

[0102] Some aspects involve indicators that are different from the fields 704-724, for indication of parameters for the STA, the STA may use to report CSI. In one aspect, the bit or �posledovatelnosti information bits in a STA can be used by STA to search for relevant parameters. STA may have saved settings, or to restore the settings in accordance with one or more of the fields 704 Nss, field 706 Ng, field 712 coefficients and field 714 codebook on the basis of such information bits in a STA.

[0103] Fig. 7B illustrates another aspect 612b information 612 STA. Information 612b STA is illustrated as comprising a field 702-724 and 732 included in the information a STA and field 726 MU/SU. In the illustrated aspect of the field 726 MU/SU contains at least 1 bit. This field can indicate to you is to STA identified field 702 AID, request feedback from a single user (SU) or feedback of multiple users (MU). Thus, AR may individually notify each STA identified in the frame 422 NDPA, were asked whether feedback or SU MU from the corresponding STA.

[0104] In some aspects one or more fields 702-732 omitted from the information 612 STA. Furthermore, additional fields may be included in information 612 STA. In some aspects a few bits of information 612 STA reserved for other or future use. For example, information s STA illustrated in Fig. 7C shows an aspect that includes a field 702 AID, box 752, containing one or more bits that have been reserved for future use�ing, and field previous saved 754 SF. Field previous saved SF can indicate when AR kept the last SF that interviewed STA identified field 702 AID. In some aspects of field previous saved 754 SF can be configured similarly to and/or can be used like a field 724 SF last saved.

[0105] For comparison with the aspect illustrated in Fig. 7B, another aspect to notify STA, queried whether the feedback MU or SU, is illustrated in Fig. 8. In the aspect illustrated in Fig. 8, box 522 MU/SU is included in the frame a NDPA. Frame a NDPA can be formatted or configured like a frame 422 NDPA, except that the field 522 MU/SU is added to the frame a NDPA so that the field 522 MU/SU is separated from the information field 514 STA. Field 522 MU/SU can be used as a "global" indicator to indicate queried whether feedback or SU MU from all STA identified in the information field 514 STA.

[0106] In some aspects, the AR may require or request that CSI is transmitted using a specific modulation scheme and coding (MCS). Fig. 9A and Fig. 9B illustrate the aspect of the frame, which includes information for determining the MCS. In the aspect illustrated in Fig. 9A, the frame a contains the NDPA frame, which was "Packed" in the package management. Thus, by�DRA can be used to request the CSI from the STA, for example, in addition to or instead of the frame 422 NDPA.

[0107] In the illustrated aspect, the frame a includes a field 502 human resource management, box 504 length field 506 RA broadcast field 508 SA, box 512 sequence CSI information field 514 STA and field 516 CRC that is included in the frame 422 NDPA. In addition, the frame a includes a field 902 transmitted by the control frame and field 904 NT-management. In the illustrated aspect field 902 transmitted by the control frame contains at least 2 bits, and the field 904 NT-management contains at least 4 bits.

[0108] Field 904 NT-management may contain information indicating the MCS for STA identified in the information field 514 STA to use when transmitting SF. In some aspects of field 604 HT control field contains control the adaptation of the channel, which includes information about what STA can be used to determine the MCS. In some aspects of the field of managing the adaptation of the channel includes a field TRQ (training request), the MAI (MCS request and indication of selection of the antenna), MFSI field (sequence ID MCS feedback (MFB)) and the MFB/ASELC (MCS feedback and data/command selection of the antenna). In some aspects cadre includes a field control very high throughput (VHT) instead of the field 904 management of high�coy-throughput (HT). VHT control field may include information as discussed above in relation to field 904 s & t management. In some aspects of field 904 s & t management or other part of the frame a includes information for STA to determine the transmission rate for transmission of CSI.

[0109] In the aspect illustrated in Fig. 9B, the frame 900b illustrated containing fields 502 to 516, 902 and 904 illustrated in relation to the frame a as an additional field. The additional field may contain the identifier of the service set that identifies the network, e.g., WLAN. In the illustrated aspect, for example, a field 912 BSSID contains the identifier of the basic service set (BSS) and BSS identifies. In some aspects of field 912 BSSID can be configured to the MAC address of the AP that transmitted the frame 900b.

[0110] Field 502 to 516, 902 and 904 illustrated in Fig. 9B, can be configured as described above in relation to Fig. 9A. In some aspects one or more of these fields contain additional bits or smaller than previously described. In some aspects of field 912 BSSID contains from 1 to 32 octets. In one aspect, field 912 BSSID contains 6 octets. In some aspects of the field 502 to 516 and 902-912 are arranged in the order than the order illustrated in Fig. 9A) and/or Fig. 9B.

[0111] Fig. 10 illustrates another aspect of the frame 1000 includes inform�information for determining the MCS. In the aspect illustrated in Fig. 10, the frame 1000 includes the CSI survey, which was "Packed" in the package management. Thus, the frame 1000 may be used to request at least a part of the CSI from the STA, for example, in addition to the survey 412 CSI or instead.

[0112] In the illustrated aspect, the frame 1000 may include at least one of: a field 1002 of personnel management, field 1004 duration field 1006 of the destination address (DA) field 1008 the source address (SA), field 1012 sequences, field 1014 remaining segments and fields 1016 control using a cyclic redundancy code (CRC).

[0113] In the illustrated aspect field 1002 of personnel management contains 16 bits. Also illustrated in the aspect of field 1004 duration contains 16 bits and may include a frame length of 1000. Field 1016 CRC in the illustrated aspect contains 32 bits.

[0114] In the illustrated aspect field 1006 DA contains 48 bits. Box 1006 DA may reflect the address of the STA, which transmitted the frame 1000, for example, as described above.

[0115] In the illustrated aspect field 1008 SA contains 48 bits. Box 1008 SA may reflect the address of the AP that transmits the frame 1000, for example, as described above.

[0116] In the illustrated aspect field 1012 sequence contains 8 bits. Field 1012 sequences may contain information indicating the sequencenumber is, shared for feedback of CSI for which AR is requesting additional segment. In some aspects of the sequence number field 1012 of the sequence is the same or copied from the sequence number of an immediately preceding frame NDPA. Thus, when the frame 1000 is used instead of survey CSI 412 in Fig. 4, box 1012 sequence may have the same meaning as CSI sequence field in the frame 402 NDPA, for example.

[0117] In the illustrated aspect of the field 1014 remaining segments contains 8 bits. Field 1014 remaining segments specifies the number of segments of the feedback CSI, which AR expects to receive from the STA, addressing, in respect of which is made field 1006 DA. In some aspects of the information included in the feedback CSI is sent to the STA that includes a number of remaining segments, which are left for transfer, as discussed below. In these aspects of information in the field 1014 remaining segments may be copied from the field remaining segments immediately preceding information CSI. For example, when the AR receives a portion of the feedback CSI 408 in Fig. 4, the frame 1000 may be sent to the STA, which gave some feedback CSI 408 field 1014 remaining segments with a value of 1. In response, the STA may transmit the one remaining piece of feedback 414 CI.

[0118] the Frame 1000 may further comprise a field 902 transmitted by the control frame and field 904 NT-management, described above in relation to Fig. 9A. As discussed above, field 904 NT-management may contain information indicating the MCS or the rate of transmission such as the transmission speed of the physical layer. STA identified in field 1006 DA, it can use the information in field 904 NT-management to determine the MCS or the transmission speed.

[0119] Fig. 11 illustrates an aspect of communication-report CSI for transmission of CSI feedback. For example, the message is a CSI report may be used to implement the feedback CSI 408 illustrated in Fig. 4. Feedback CSI 408 may be determined by a STA in response to the received frame NDPA, for example the frame 402 NDPA or frame 422 NDPA described above. As described in more detail below, elements of the feedback CSI 408 can be generated on the basis of information in the NDPA frame. Message-the CSI report may include a frame for transmission of CSI feedback.

[0120] In one aspect, the feedback CSI 408 may be generated by one of the STA identified in the frame 402 NDPA, and transferred to the Autonomous SIFS period after the frame 404 NDP. For example, the first STA identified in the STA information field, can generate feedback CSI 408 and offline to send feedback 408 CSI to AR in a SIFS period after the frame 404 NDP. Other STA, identific�rowanna in STA information field, can expect a polling message to be transferred to the respective CSI feedback, as discussed above.

[0121] the feedback CSI 408 may comprise at least one of: a field 1102 workforce management, field 1104 duration field 1106 destination address (DA) field 1108 the source address (SA) field 1110 of the feedback CSI, field 1112 CSI feedback with the computed CSI or field 1114 control using a cyclic redundancy code (CRC). Feedback CSI 408 may refer to the type of message Action No Acknowledgement (action without acknowledgement, ACK), which may not require ACK. In the illustrated aspect, the feedback CSI 408 may include a frame control.

[0122] In some aspects instead of the fields described above, the feedback CSI 408 may include a category field, action field, a sequence field sensing, field 1110 management CSI feedback and/or report on the sensing. In such aspects, the feedback CSI 408 may contain a frame of the action. In some aspects of field 1112 CSI feedback and report on the sensing contain similar information.

[0123] In some aspects, the information of channel state and/or SF can be reflected in the form of a matrix, as discussed above, and report the sensing and/or field 1112 CSI feedback may include data indicative or matrix. As Russ was also�otrino above, the matrix contains many frequencies, singular vectors or singular values in some respects.

[0124] There are some situations in which a STA can determine that will not be sent feedback. For example, SF may not be transferred if the previous relevant frame NDPA/NDP not received or if the current SF in General similar to that passed before this SF. As another example, SF may not be transferred if the transfer would exceed the limit PPDU or the possibility of the transmission (TXOP). In some aspects of field 1112 CSI feedback may be excluded in such situations. Thus, the lack of field 1112 CSI feedback may reflect that SF is not transmitted in some aspects. For example, if a device such as AR, takes feedback CSI 408, the device can determine the length of the feedback CSI 408. Length can be used to determine whether a field 1112 CSI feedback, and can be determined that no SF will not be transferred if omitted CSI feedback. In some aspects, the indicator in field 1110 management CSI feedback may indicate the reason why SF is not transmitted.

[0125] Fig. 12A-Fig. 12E illustrate an aspect of field management for feedback sensing, such as field 1110 of the feedback CSI. In some aspects of field 1110 management clicks�a combined communication CSI contains the MIMO control field is very high throughput (VHT).

[0126] In the aspect illustrated in Fig. 12A, the field a management CSI feedback may include one or more of the subfields 1202 Nc, subfields Nr 1204, a sub-field 1206 bandwidth, a sub-field 1212 Ng, a sub-field 1214 codebook, subfields 1216 coefficients, a sub-field 1222 remaining segments subfields 1224 sequence, a sub-field 1232 MU/SU subfield 1234 zero CSI, a sub-field 1236 missed NDPA/NDP and subfields 1238 difference CSI. In some aspects of the field a management feedback CSI has a reserved sub-field 1242, which includes bits in addition to those set for subfields 1202-1238 that can be used for any number of purposes. In some aspects subfields 1202-1242 are arranged in an order that differs from the order illustrated in Fig. 12.

[0127] In the illustrated aspect subfield 1202 Nc contains at least 3 bits. Subfield 1202 Nc may reflect the number of columns in the matrix, discussed above, which reflects the CSI for STA. The use of 3 bits provides information regarding at least 5 antennas. In some aspects 3 bits provide information for 8 antennas.

[0128] In the illustrated aspect subfield Nr 1204 comprises at least 3 bits. Subfield Nr 1204 may reflect the number of rows in the matrix discussed above. The use of 3 bits provides information from�Oseni at least 5 antennas. In some aspects 3 bits provide information for 8 antennas.

[0129] In some aspects, the information from the subfield 704 Nss information STA 612 is used to determine Nc and Nr. In one aspect, the STA sends SF, for example, in the statement of sensing or field 1112 CSI feedback using exactly the same number of spatial streams (e.g. natural frequencies, as indicated in field 704 Nss. This may reflect in Nc and Nr. The use of exactly the same number of spatial streams can reduce the loss of SF, since SF will be no more than is required as determined AR. Thus, resources will not be wasted due to the fact that there is more feedback than required by AR. In other aspects, the STA may be used more or fewer spatial streams than the AR requires.

[0130] In the aspect illustrated in Fig. 12A, subfield 1206 bandwidth comprises at least 2 bits. Subfield 1206 bandwidth can reflect the bandwidth of the feedback CSI. For example, 2 bits may be used to reflect 4 different values (i.e. 0, 1, 2 and 3), each of which may correspond to one of the following frequencies: 20 MHz, 40 MHz, 80 MHz and 160 MHz.

[0131] In the aspect illustrated in Fig. 12A, subfield 1212 Ng contains at �'ere 3 bits. Subfield 1212 Ng may reflect the grouping of tones in which STA generated CSI feedback. Using these 3 bits can be identified 8 different options of tone groups. For example, can be identified by selecting, including provincial/DC tones. In some aspects subfield 1212 Ng contains at least 2 bits.

[0132] In some aspects, the feedback CSI is generated for each tone used by the STA. For example, can be up to 468 tones, when the transmission bandwidth of the feedback CSI is 160 MHz. Some of the tones, however, can be grouped together so that information is reported on all colours in the group simultaneously. Subfield 1212 Ng may reflect how the tones were grouped and many tones in the group. For example, 3-4 tones can be grouped together and averaged information for these tones is used to generate CSI feedback.

[0133] In one aspect, the STA sends the CSI feedback with tone groups, which are not more than the tone group specified field 706 Ng in information 612 STA. In some aspects, however, the STA may use a smaller value Ng than the specified field 706 Ng. The use of groups that are not greater than those indicated field 706 Ng, will reduce the probability that the gain of MU will be reduced. Such declines may occur because we� AR decided to use Ng, specified in field 706 Ng through the transfer MU/SU. In other aspects, the STA may use a tone groups, which are more specified field 706 Ng.

[0134] In the aspect illustrated in Fig. 12A, the sub-field 1214 codebook comprises at least 3 bits. Subfield 1214 codebook may include information that AR can be used to make readings in the table indicating how the quantized CSI values. In some aspects STA quantum values using at least as many bits as specified by a field 714 codebook information 612 STA. The use of at least such number of bits specified what field 714 codebook, will reduce the likelihood that amplification of MU will be reduced. Such a depression may occur due to the fact that the AR made a decision about the requested quantization on the basis of AR is to use SF in the Protocol MU or SU. In other aspects, the STA may use a smaller number of bits than that specified field 714 codebook. In some aspects subfield 1214 codebook contains one or more bits.

[0135] In the illustrated aspect subfield 1216 coefficients contains at least 3 bits. Subfield 1216 914 coefficients may reflect the size of the coefficient, which can match the quantization used by the STA for the entries of the matrix that was described you�E. In some aspects subfield 1216 coefficients contains one or more bits. In some aspects subfield 1216 coefficients omitted. For example, SF can be formatted in the form of concise feedback, in this case, the size of the coefficient may not be enabled.

[0136] In some aspects STA quantum entries of the matrix using at least as many bits as specified by a field 712 coefficients information 612 STA. The use of at least such number of bits specified what field 712 ratios, will reduce the probability that the gain of MU will be reduced. This reduction may occur due to the fact that the AR made a decision about the requested quantization on the basis of AR is to use SF in the Protocol MU or SU. In other aspects, the STA may use a smaller number of bits than that specified field 712 of the coefficients.

[0137] In the illustrated aspect subfield 1222 remaining segments may contain at least 5 bits. Subfield 1222 remaining segments may reflect the number of segments that have to be transferred in respect of CSI feedback for STA, as discussed above.

[0138] for Example, the number of bytes for CSI feedback may be large. For example, when uncompressed bandwidth 8x3 80 MHz number of bytes for CSI feedback can�add up to about 12K. Volumetric CSI feedback may not fit into one Protocol data unit MAC (MPDU) due to limitations on the size of the MPDU. The maximum size of the MPDU about 8K can be obtained by indicating the delimiter of an aggregated MPDU (A-MPDU). In addition, the capacity of the MPDU may be even less after approval.

[0139] the CSI feedback may be segmented into a MPDU. For example, segments of CSI feedback may be transmitted within a few MPDU A-MPDU. Thus, subfield 1222 remaining segments may reflect the number of remaining feedback segments CSI or SF that remains for transmission after the current MPDU.

[0140] In the aspect illustrated in Fig. 12A, subfield 1224 sequence may contain no more than 8 bits. Subfield 924 sequence may contain information indicating a sequence number that is common to all segments of the CSI feedback transmitted to the STA. In some aspects the sequence number of the specified field 1224 of the sequence is the same or is copied from the sequence number of the previous frame NDPA, for example, from a field sequence CSI.

[0141] In the illustrated aspect of the field a management CSI feedback includes a subfield 1232 MU/SU to indicate if the corresponding CSI feedback was calculated for MU or SU. In some aspect.forty link CSI is determined according to field MU/SU in the NDPA frame, for example, as illustrated in Fig. 7B or Fig. 8. In other aspects, the STA determines whether to calculate CSI for SU or MU. In some aspects, the feedback computed for SU can be determined at a lower resolution. Thus, the definition of feedback SU instead of feedback MU may reduce the level of complexity processing or STA can reduce the amount of network resources used for sending feedback. In the illustrated aspect of the field MU/SU contains at least 1 bit.

[0142] In the illustrated aspect subfield 1234 zero CSI contains at least 1 bit. Subfield 1234 zero CSI can be used to indicate whether a STA to transmit CSI. For example, subfield 1234 zero CSI may be set to 0 if CSI is not transmitted, and can be set to 1 if the CSI is transmitted. In other aspects, these values can be distributed in the opposite way. In some aspects subfield 1234 zero CSI may be omitted, and the length of the feedback CSI 408 is used to determine whether transmitted CSI. In such aspects, if it is determined that the CSI is not transmitted, the field a management CSI feedback may include an indicator that indicates that the CSI is not transmitted, because the send limit may be exceeded. For example, a field a control reverse light�CSI new York may contain one bit field, indicates whether the transmission of the CSI to exceed the limit PPDU or TXOP. The excess of the PPDU or TXOP may occur if the frame containing the CSI will be too long to pass, for example.

[0143] In the illustrated aspect subfield 1236 missed NDPA/NDP contains at least 1 bit. When subfield 1234 zero CSI indicates that the CSI will not be transferred, sub-field 1236 missed NDPA/NDP can be used to denote the condition that contributed to the fact that CSI will not be shared. In one aspect, a value of 0 in the sub-field 1236 missed NDPA/NDP indicates that the corresponding frame NDPA was not adopted, whereas a value of 1 in subfield 1236 missed NDPA/NDP indicates that the corresponding frame NPD was not adopted.

[0144] In another aspect, a single value subfield 1236 missed NDPA/NDP is used to indicate that no NDPA or NDP corresponding to the identifier in field 1224 of the sequence, were not accepted. For example, the value 0 can be used to indicate this condition. Another value, for example 1, can be used to indicate that the CSI is transmitted as the current CSI is within the threshold value transferred before CSI. For example, when a field was last saved SF NDPA reflects that the last SF, transmitted by the STA that was saved, a STA can refrain from sending current SF if tech�per se SF in General, this kind of stored SF. In this situation subfield 1236 missed NDPA/NDP may be set at such a value to indicate that the channel has not changed enough to allow transfer of additional SF.

[0145] In the illustrated aspect subfield 1238 difference CSI contains at least 1 bit. When subfield 1234 zero CSI reflects that CSI is transmitted, subfield difference CSI can be used to denote to see full CSI or transmitted information indicating the difference. For example, a value of 0 in the sub-field 1238 difference CSI may mean that you'll pass the full CSI. A value of 1 in subfield 1238 CSI difference, however, may indicate that the transmitted information indicating the difference between the previously transmitted current CSI and CSI. For example, when a field was last saved SF NDPA indicates that the last SF STA was stored in AP, STA can calculate and transmit the difference between the current SF and SF stored, as well as identify these actions for AR, using subfield 1238 difference CSI. As discussed above, in some aspects, the difference can be expressed using fewer bits and thus can contribute to the reduction of losses.

[0146] AR host field a management feedback CSI, may use information in it to determine the CSI. In some aspects, such as aspects, when the STA does not transmit the CSI as from�ageno the subfield 1234 zero CSI, AR may be used first adopted by the CSI or stored. In other aspects, the CSI can take full CSI from AR or can receive data indicating the difference, and then can calculate the current CSI based on the difference and saved before CSI, for example, as reflected by the sub-field 1238 difference CSI.

[0147] In some aspects of AR can adjust the settings for sending information to the STA on the basis of information in the field a management feedback CSI. For example, when subfield 1236 missed NDPA/NDP reflects that previously uploaded NDPA or NDP was not adopted, the AP can transmit the NDPA or NDP again or can reduce the speed as the PHY-transmission speed used to send future NDPA and/or NDP. If subfield 1236 missed NDPA/NDP reflects that previously uploaded NDPA or NDP was adopted, AR can increase the baud rate or can adjust another parameter, such as modulation scheme. Also, if a management CSI feedback reflects that the channel is not changed or changed very slightly, for example, using subfield 1236 missed NDPA/NDP and/or subfield 1238 difference CSI, AR can lower the frequency at which requests a CSI at STA. Similarly, if AP accepts full CSI every time or channel seems to be rapidly changing, AR can increase the frequency at which requests a CSI at STA.

[0148] In some ASPE�tick one or more of the fields 1202-1242 excluded from field 1110 of the feedback CSI. Furthermore, additional fields may be included in field 1110 of the feedback CSI. In some aspects of some of the bits in the information 612 STA are reserved for other or future use. For example, a field 1110b management feedback CSI illustrated in Fig. 12B shows the aspect, including the subfield 1202 Nc, subfield Nr 1204, subfield 1206 bandwidth, subfield 1222 remaining segments sub-field 1224 sequence number and optional subfield 1232 MU/SU. In addition, field 1110b management CSI feedback includes a subfield 1252 SF and zero subfield 1254 use previous SF.

[0149] In the illustrated aspect subfield 1252 SF zero contains at least 1 bit. Subfield 1252 zero SF can be reflected, transmitted through SF STA. In some aspects subfield SF zero configured and/or used like a sub-field 1234 zero CSI.

[0150] In the illustrated aspect subfield 1254 use previous SF contains at least 1 bit. Subfield 1254 use previous SF may reflect whether used SF, first stored in AR. For example, when the previous field stored in SF NDPA reflects that passed before SF was stored in AR, subfield 1254 use previous SF can be used to indicate that the saved SF should�ü combined with the data of the difference, transmitted by the STA. In some aspects, if the subfield 1252 SF and zero subfield 1254 use previous SF reflect that SF is not transmitted, AR can conclude that the previous NDPA frame and/or frame NDP was not adopted. Thus, subfield 1252 SF zero may reflect that the CSI is not transmitted, whereas subfield 1254 use previous SF reflects the condition that caused that CSI is not transmitted, such as the absence of information about the channel or the insignificance of the difference between the current SF and previous SF. A table summarizing one aspect of possible values of subfields 1252 SF zero and subfields 1254 use previous SF, inserted below. The table shows how the values relate to the potential transfer of CSI.

Zero SFUse previous SFAction
00transfers to General SF
10no available SF
01the difference is transmitted SF
11no SF in it� frame

[0151] Field s management feedback CSI illustrated in Fig. 12C shows the aspect, including the subfield 1202 Nc, subfield Nr 1204, subfield 1206 bandwidth, subfield 1222 remaining segments sub-field 1212 Ng subfield code 1214 books, subfield 1222 remaining segments sub-field 1224 sequence numbers, and optional subfield 1232 and/or the reserved sub-field 1242. Each of these subfields can be configured as described in relation to Fig. 12A.

[0152] In contrast to the field a management feedback CSI illustrated in Fig. 12A, however, the field s management feedback CSI lowers subfield 1234 zero CSI and instead includes a subfield 1262 of the first segment. Subfield 1262 of the first segment may be used to indicate whether the feedback CSI, which is transmitted, the first segment of this CSI. If the AR receives a segment CSI new CSI, but subfield 1262 of the first segment does not reflect the fact that the received segment is the first segment of a new CSI, the AP may determine that missed at least one first transmitted segment of the new CSI. CSI can be identified as using new subfield 1224 serial numbers and/or using a sub-field 1222 remaining segments. For example, if the subfield 1222 remaining segments associated with previous�m segment of CSI indicated that the segment was the last segment, any segment of the CSI, which are adopted in the future, can be identified as associated with the new CSI.

[0153] in addition, subfield 1236 missed NDPA/NDP and subfield 1238 difference CSI illustrated in Fig. 12A, were replaced by a single subfield 1264 zero CSI and CSI difference in field s management feedback CSI. In the illustrated aspect subfield 1264 zero CSI and CSI difference comprises at least 2 bits. The implementation of the sub-field 1264 zero CSI and CSI difference thus allows a field s management CSI feedback be implemented using the same number of bits as that of the field a management feedback CSI. Subfield 1264 zero CSI and CSI difference may reflect, is there any standard SF if the difference between the current SF and previous SF minor and/or SF is not available. In one aspect, the SF may not be available if the corresponding frame is NDP or NDPA was not adopted. Specialists in the art it is clear that sub-field 1264 zero CSI and CSI difference may be used to indicate the same or similar information to that designated one or more of subfields 1234 zero CSI, a sub-field 1236 missed NDPA/NDP, a sub-field 1238 difference CSI sub-fields 1252 SF zero and subfields 1254 use previous SF. One aspect of possible values of subfields 126 zero CSI and CSI are summarized in the table below. The table illustrates how the values relate to the potential transfer of CSI.

Subfield difference and zero CSIAction
00regular feedback
01SF unavailable: indicates that the NDPA or NDP frame was adopted, but the CSI must be passed
10A zero difference indicates that NDPA or NDP frame was adopted, but CSI does not have to be transferred
11Reserved or indicates that the transmitted CSI feedback CSI is the difference

[0154] the Specialists in the art it will be understood that other values or combinations of values may correspond to the listed actions. For example, the actions associated with "0 1" and "1 1" can be moved in the table above.

[0155] In the table above, the values "1 1" may be used to indicate that the transmitted CSI feedback CSI is the difference. In other aspects of value�"1 1" may be reserved. In some aspects, the values "1 1" may be used to indicate that the CSI is not included because the transmission of CSI feedback may exceed the limitations on the transfer, such as limitations PPDU or TXOP. For example, if the length of the CSI feedback, such as feedback CSI 408 indicates that SF is not transmitted, the value "1 1" may represent that the condition that contributed to the lack of transfer, - limit the PPDU or TXOP.

[0156] In some aspects, if the length of the feedback CSI 408 indicates that SF is not transmitted, one or more indicators or subfields discussed above, can be used to indicate conditions in virtue of which is not in the handover SF. For example, subfield 1236 missed NDPA/NDP, subfield 1238 difference CSI sub-field 1254 use previous SF and/or podole zero CSI and CSI difference can mean, under what condition. In other aspects of the new field can be defined to indicate the conditions. In other aspects one or more bits that can be used for another purpose, when the CSI is transmitted, can be used to provide such indication. For example, one or more bits in the box 1222 remaining segments can be used for status indication, if the length of the feedback CSI 408 reflects that SF is not transmitted.

[0157] Field 1110d management feedback CSI, p�illustrirovannoe in Fig. 12D, shows the aspect, including the subfield 1202 Nc, subfield Nr 1204, subfield 1206 bandwidth, subfield 1212 Ng subfield code 1214 books, subfield 1224 serial numbers and subfield 1232 MU/SU. In the illustrated aspect, however, subfield 1206 bandwidth is illustrated as a subfield of the channel width. In addition, subfield 1212 Ng as illustrated subfield grouping. Also subfield 1232 MU/SU as illustrated subfield type of feedback, and subfield 1224 serial numbers is illustrated as a subfield sequence sensing. Each of these subfields can be configured as described above in relation to Fig. 12A.

[0158] Field 1110d management CSI feedback additionally includes a reserved sub-field 1242. In the aspect illustrated in Fig. 12D, the reserved sub-field 1242 may be used to indicate whether the transmitted CSI. Thus, the reserved sub-field 1242 may reflect that the frame of the feedback CSI 408 is a null frame feedback (frame zero feedback), for example, omitting information from a field 1112 CSI feedback or completely omitting field 1112 CSI feedback. Reserved sub-field 1242 may therefore be used in some aspects to display information like the subfields 1234 zero CSI that was� discussed above.

[0159] In the aspect illustrated in Fig. 12D, the reserved sub-field 1242 may instead, or in addition to the above used to indicate whether the transmitted CSI feedback first segment of this CSI. Reserved sub-field 1242 may therefore be used in some aspects to display information like the subfields 1262 of the first segment, which was discussed above.

[0160] In the aspect illustrated in Fig. 12D, the reserved sub-field 1242 may instead, or in addition to the above used to indicate the number of remaining segments CSI feedback or SF that remains for transmission after the current MPDU. Reserved sub-field 1242 may therefore be used in some aspects to display information like the sub-field 1222 remaining segments that have been discussed above. Thus, the reserved sub-field 1242 may reflect which of the plurality of feedback segments and what is the first number of segments feedbacks are not enough. The first indication and the remaining segments may signal receiver, such as AR, about how many segments to expect, and whether all segments were taken.

[0161] In the aspect shown in Fig. 12D, the reserved sub-field 1242 illustrated as containing four� bit. In one aspect, one of the four bits may be used to indicate whether the segment of the transmitted feedback first segment. For example, a bit value of "1" may be used to indicate that the segment is the first segment, and a bit value of "0" may reflect that the segment is the first segment. In some aspects B15 is used as a single bit.

[0162] In such aspects, one or more of the remaining bits in the reserved sub-field 1242 may be used to indicate the number of remaining segments or subject to transfer. For example, if bit 15 is used to indicate whether the transmitted segment is the first segment, the bits B12-B14 can be used to indicate the number of remaining segments. The value "111" may reflect that the remains of seven segments, the value "110" may reflect that remains six segments, and so on. If you pass only one segment, the first bit of the segment can be set to "1" and all remaining bits of the segments to "0". If B12-B14 reflect the number of remaining segments and B15 reflects whether this segment is the first segment, the reserved sub-field 1242 may therefore have a value of "0001" to indicate that expects a single segment feedback.

[0163] In some aspects �Vice versa, the communication can be divided into no more than eight segments. In these aspects can be a maximum of seven remaining segments. Seven segments can stay, but only if the transmitted segment is the first segment. Thus, there can be circumstances in which a segment, the first segment would indicate that the remains of seven segments. In such aspects bits of the first segment can be set to "0" and the remaining bits of segments "1" to indicate that the CSI is not transmitted. If B12-B14 reflect the number of remaining segments and B15 reflects whether this segment is the first segment, the reserved sub-field 1242 may therefore have a value of "1110" to indicate that zero is transmitted frame feedback. Thus, the indication that the first segment is not transmitted, in combination with an indication that the maximum number of remaining segments is still transferable, may signal receiver, such as AR, that no CSI is not transmitted.

[0164] In some aspects, if a reserved sub-field 1242 reflects that no CSI is not transmitted, all the bits prior to a reserved sub-field 1242 may be used as reserved bits. Thus, if you pass a null frame feedback bits B0-B11 can be reserved. In some aspects one or more of these bits can� be used to indicate conditions contributed to the lack of transmission of CSI.

[0165] for Example, the bits B10-B11 can be used for the reason that the feedback is missing. The reason may relate to receiving information about the sensing, limit transmission, the calculated CSI among other reasons. In some aspects B10-B11 are set to the value "00", if the sensing information is missing, for example, if a frame NDPA or NDP was not adopted or was adopted incorrectly. In some aspects B10-B11 are set to the value "01", if the feedback could not be sent because of the TXOP limit. In some aspects B10-B11 are set to the value "10", if the feedback could not be sent because of the restriction PPDU. In some aspects B10-B11 are set to the value "11", if the transmitted information channel state in General similar to the current information state of the channel. In some aspects, the value "11" is reserved for B10-B11.

[0166] In the aspect illustrated in Fig. 12D, the subfield of the coefficients omitted. In addition, subfield 1232 MU/SU is up to the remaining segments, the first segment, zero feedback or indicators. In addition, subfield 1223 serial numbers is after such information or indicators and, therefore, after the reserved field 1242.

[0167] Fig. 12E illustrates AC�project field e management feedback CSI, demonstrating a reserved sub-field 1242 divided into subfield 1272 remaining segments and subfield 1274 of the first segment. In the illustrated aspect subfield 1272 remaining segments contains bits B12-B14 field e, and subfield 1274 of the first segment contains a bit field B15 e. Subfield 1272 remaining segments can be used to deliver such information, or may be configured similarly to the sub-field 1222 remaining segments discussed above. Subfield 1274 of the first segment can be used to deliver such information, or may be configured similarly to the subfield 1262 of the first segment discussed above. Considered together subfield 1272 remaining segments and subfield 1274 of the first segment can be used to deliver such information, and subfield 1234 zero CSI and/or subfield 1252 SF zero discussed above.

[0168] Subfield 1272 remaining segments and subfield 1274 of the first segment can be set to different values, as described above in relation to bits B12-B14 and B15, respectively, for display of information about the CSI feedback. Approximate values of these subfields, and the subfields 1202-1232 field e are listed in the table below. Values below are only illustrative and not to limit. The average specialist in �Anna field of technology will be clear what can be used other values or other information may be recorded using the illustrated values.

SubfieldThe value and description of the specified information
Index NcReflects the number of columns in the matrix minus one:
Set to 0 for Nc=1
Set to 1 for Nc=2
...
Set to 7 for Nc=8
Index NrReflects the number of rows in the matrix minus one:
Set to 0 for Nr=1
Set to 1 for Nr=2
...
Set to 7 for Nr=8
Channel widthReflects the width of the channel in which it was measured:
Set to 0 for 20 MHz
Set to 1 for 40 MHz
Set to 2 for 80 MHz
Set to 3 for 160 MHz or 80+80 MHz
GroupingThe number of carriers grouped into one:
Set to 0 for Ng=1 (no grouping)
Set to 1 for Ng=2
Set to 2 for Ng=4
The value 3 is reserved
The feedback typeSet to 0 if the report feedback for S-BF. If set to 0, the frame of the report on the feedback will not include box exclusive report on the beamforming MU.
Set to 1 if the report feedback for MU-BF. If set to 1, the frame of the report on the feedback will include box exclusive report on the beamforming MU.
Information codebookReflects the size of codebook entries:
If the feedback type is set to 0 (SU-BF)
Set to 0 to 2 bits for ψ, 4 bits for ϕ
Set to 1 to 4 bits for ψ, 6 bits for ϕ
If the feedback type is set to 1 (MU-BF)
Set to 0 to 5 bits for ψ, 7 bits for ϕ
Set to 1 to 7 bits for ψ, 9 bits for ϕ
The remaining segmentsContains the number of remaining segments for the corresponding inspection report.
Valid range: 0-7.
Set to 0 for the last segment of a segmented report or the only segment of an unsegmented report.
When the first segment is set to 0, the remaining segments, which 7, reflect that the frame is frame zero feedback, for example, the compressed statement of beamforming VHT and exclusive statement of fo�research Institute of the directivity diagram of MU is not presented.
The first segmentSet to 1 if the segment is the first segment. Set to 0 if the segment is the only segment.
The sequence of sensingThe serial number from the requesting feedback NDPA.

[0169] Fig. 13 illustrates an aspect of an access point (AP) 1300 for use within system 100. AR 1300 may contain AR 110 illustrated in Fig. 1-Fig. 2. As discussed above, AR 1300 may be implemented as a wireless device, such as wireless device 302 illustrated in Fig. 3. AR 1300 can be used to communicate with the user terminal or the STA, as described in relation to Fig. 4-Fig. 12.

[0170] AR 1300 can include a module 1302 NDPA to generate the NDPA frame, for example frame 402 or 422 NDPA. When generating a frame of the NDPA module 1302 NDPA may determine whether SF is taken from the STA in response to the previous NDPA frame or in response to polling message. SF may be accepted by the receiving module 1204, for example, and the NDPA frame may be transmitted by the transmitting module 1206. The polling message may be generated survey module 1208. The result of such determination may be included in the NDPA frame, for example in the field last adopted SF as discussed above.

[0171]the Module 1302 NDPA may further determine if the last SF, which was produced by a survey questionnaire module 1308 stored in the block memory 1312. The result of such determination may be included in the NDPA frame, such as in SF last saved, as discussed above.

[0172] In some aspects, the module 1302 NDPA configured to pack the NDPA frame in the package management, for example, as shown in Fig. 9A or Fig. 9V. In these aspects, the module 1302 NDPA may be configured to define a field of NT-management and/or MCS for the STA to send the requested CSI. The module 1302 NDPA may also determine the transmission rate at which the STA should be used to send the requested CSI. The result of such determination may be included in Packed NDPA frame.

[0173] the Module 1202 NDPA may be configured to determine one or more STA from which the information is requested feedback CSI. Information identifying these STA may be included in the STA information field, as described above in relation to Fig. 6A-Fig. 6C.

[0174] the Module 1302 NDPA may be configured to determine the settings for STA purposes of feedback CSI. For example, the module 1202 NDPA may determine whether each or STA all STA should calculate CSI for SU or MU. The module 1302 NDPA may further be configured to determine the number of spatial channels or streams (e.g. natural frequencies) CSI feedback, which could be calculated on STA, the grouping of tones on which the STA shall generate the feedback CSI, the size of the coefficient corresponding to the quantization used by the STA for the entries of the matrix CSI feedback and/or information codebook indicating the quantization of angles for which STA should be used for CSI feedback, as described above in relation to Fig. 7. In some aspects, the module 1302 NDPA configured to determine one or more of the above parameters on the basis of whether the feedback CSI is used for MU or SU.

[0175] In some aspects, the module 1302 NDPA configured to determine the frequency for sending an NDPA frame, for example, based, at least partially, CSI or changing the channel specified in CSI feedback, as discussed above. The module 1302 NDPA may further be configured to generate or determine any of the other information described above in relation to the frame 422 NDPA. In some aspects the functionality of the module 1302 NDPA is implemented using at least the controller 230 illustrated in Fig. 2.

[0176] the Receiving module 1304 may be used to receive control information, CSI feedback and/or other transmissions from the STA, such as transfers, wook�Yausa, what no feedback CSI is not transmitted from STA. The received data can be demodulated, converted to a lower frequency or otherwise processed by the receiving module 1304, or by another module. The receiving module 1304 may be implemented using a receiver, such as receiver 312, illustrated in Fig. 3, or a combination of receivers, e.g. receivers a-a illustrated in Fig. 2. The receiving module 1304 may be implemented as a transceiver and may include a demodulator and/or the processor receiving data, such as RX-processor 242 of the data. In some aspects, the receiving module 1304 comprises an antenna or transceiver, for example the antenna of the transceiver 224 and 222. The transceiver may be configured to demodulate incoming wireless messages. Messages can be received via antenna.

[0177] Transmitting module 1306 may be used to NDPA frame transmission and/or polling messages. In some aspects, the transmitting module 1306 is configured to wirelessly transmit the NDPA frame, for example, to the user terminal 120. Transmitting module 1306 may be implemented using a transmitter, such as transmitter 310 illustrated in Fig. 3, or a combination of transmitters, such as transmitters a-ar, illustrated n� Fig. 2. Transmitting module 1306 may be implemented as a transceiver and may include a modulator and/or a data processor, such as the TX-processor 210. In some aspects, the transmitting module 1306 comprises an antenna or transceiver, for example the antenna of the transceiver 224 and 222. The transceiver may be configured to modulate outbound wireless messages sent by the STA or the user terminal. Messages can be transmitted through the antenna.

[0178] the Polling module 1308 may be used to generate a polling message for transmission to the STA, for example any of the polls 412, 416 CSI. Question module may determine which STA to transmit a polling message, on the basis of information received by the receiving module 1304. For example, information about the remaining segments adopted in the control message field or by the receiving module 1304 may be used to survey module 1308 to generate a polling message.

[0179] In some aspects of the question module 1308 configured to pack the polling message in the package management, for example, as shown in Fig. 10. In these aspects of the question module 1308 may be configured to define a field of NT-management and/or MCS for the STA to send the requested CSI. The result of this step�tion can be included in Packed polling message.

[0180] the Polling module 1308 may further be configured to generate or determine any of the other information described above in respect of polling messages, such as a survey of 412 CSI or survey 416 CSI, or frame 1000, for example, to include the index number or the NDPA frame. In some aspects the functionality of polling module 1308 is implemented using at least the controller 230 and/or the scheduler 234 illustrated in Fig. 2.

[0181] the Block memory 1312 may be configured to store information CSI, adopted from one or more STA, for example, via the receiving module 1304. As described above, the CSI can be expressed in matrix form, which can be stored in the block memory 1312. Other formats for representing the CSI, may also be stored in the block memory 1312. In some aspects, the CSI, which has become overdue or which has expired, may be periodically removed from the unit memory 1312. Block 1312 of the memory can be volatile or non-volatile or a combination thereof. In some aspects the functionality of the unit 1312 of the memory is implemented using at least block 232 of the memory illustrated in Fig. 2, and the block memory 306, illustrated in Fig. 3.

[0182] AR 1300 may further include a module 1314 processing the CSI for about�of abode adopted CSI feedback, for example, adopted by using the receiving module 1304. Module 1314 processing the CSI may be configured to process the CSI feedback using one or more parameters specified in the received message, for example, in accordance with SU or MU. Module 1314 processing the CSI can also be configured to process the CSI feedback using one or more parameters specified in the previously transmitted frame, e.g., using the MCS transmitted in a Packed frame.

[0183] In some aspects, the module 1314 processing the CSI configured to determine if the transmission is taken from the STA, an indication that the STA is not available for feedback of CSI for transmission. For example, a field of zero CSI can be taken in the feedback CSI, which indicates that no CSI is not accepted, or one or more values in a reserved field, such as field of the first segment or the remaining segments may reflect that no CSI is not taken. The CSI processing module may be configured to determine if the stored CSI should be used, for example, by estimating the zero field SF and fields of use previous SF. In some aspects of pitch processing CSI configured to change the baud rate or modulation for transmission of CSI requests on �Snov information adopted in the feedback CSI, as described above. In some aspects, the module 1314 processing the CSI may determine that no CSI is not taken on the basis of the length of the program. Module 1314 processing the CSI may also be configured to determine a condition that contributed to the lack of reception of CSI.

[0184] In some aspects, the module 1314 processing the CSI configured to generate CSI based on the difference, as adopted in the feedback CSI. For example, when the difference of CSI or field of use previous SF indicates that the data indicating the difference between the current CSI before CSI stored, transmitted, a module 1314 processing the CSI may determine the current CSI, using difference data and CSI stored in the block memory 312.

[0185] In some aspects, the module 1314 processing the CSI is configured to analyze the adopted feedback CSI to determine the frequency for sending an NDPA frame, for example, based, at least partially, CSI or changing the channel specified in the CSI feedback. This information can be transmitted to the module 1302 NDPA. In some aspects the functionality of the module 1210 processing CSI is implemented using at least the controller 230 and/or RX processor 242 data illustrated in Fig. 2.

[0186] the Specialists in the art will be apparent various circuits, chips, modules and/or components, which can contain as software, hardware or both that can be used to implement the modules described above in relation to AR 1300. One or more modules AR 1300 may be partially or wholly implemented in the processor 304, illustrated in Fig. 3.

[0187] Fig. 14 illustrates an aspect of the method of transmission. The method can be carried out AR 1200, for example, to request the state information of the channel from STA and to inform STA about whether previous SF taken from STA and/or stored in AR. Although the presented method will be described in relation to the elements of art 1200, specialists in the art it will be understood that other components may be used to implement one or more steps described herein.

[0188] In step 1402 is transmitted the first request information, channel state, for example using the transmitting module 1204. The first request may include the notification of a zero data packet or polling message, for example. The module 1302 NDPA or question module 1308 may be used to generate the query.

[0189] With continued in step 1404 determines whether the information of channel state adopted in response to the first request or the status information of the channel was maintained after the transfer. This definition can �be done by the module 1314 processing the CSI, for example. Information channel state may be accepted by the receiving module 1304 or may be stored in the block memory 1312.

[0190] When a transition to step 1406 is transmitted the second request containing an indicator that indicates a result of determination, for example using the transmitting module 1306. The second request may include the NDPA frame, for example. In some respects the result of the determination is reflected in the latest adopted SF, SF last saved or previous saved SF, as discussed above in relation to Fig. 7. The module 1302 NDPA and/or module 1314 processing the CSI can be used when creating the second request.

[0191] Fig. 15 illustrates an aspect method 1500 transmission. The method can be carried out AR 1200, for example, to receive data indicating the information of channel state, or receive a notification that the information channel state information will not be shared. In some aspects, the method 1500 may be used to determine why information channel state information is not transmitted from STA. Although the presented method will be described in relation to the elements of art 1200, specialists in the art it will be understood that other components may be used to implement one or more steps described herein.

[0192] In step 1502 is transmitted the request information of the channel state, for example, �eradawson module 1306. After that, in step 1504, accepted the transfer. The transmission may include the first indicator and the second indicator indicating whether the transmission information of the channel state. If the first indicator and/or the second indicator to reflect that the information channel state is enabled, the first indicator and/or the second indicator to indicate whether the information channel state information indicating the difference between the current state information of the channel and above the accepted information of the channel state. The first and second indicators may contain two or more of the fields are zero CSI, missed field NDPA/NDP, zero field SF field use previous SF and/or field zero CSI and CSI difference, as described above in relation to Fig. 12. The transmission can be received using the receiving module 1304, for example. The transmission can be processed by a module 1314 processing the CSI, for example, to determine if the information included CSI, and/or to determine whether to use CSI, stored in AR.

[0193] Fig. 16 illustrates an aspect of 1600. The method can be carried out AR 1200, for example, to inform STA about MCS for transmission of CSI. Although the presented method will be described in relation to the elements of art 1200, specialists in the art it will be understood that other components may be used to implement one or�how many of the stages, described here.

[0194] In step 1602 determines the modulation scheme and coding (MCS) or the transmission rate information reception state of the channel. In some aspects, the module 1302 NDPA may perform such a determination. In other aspects of the question module 1308 may determine the execution definition. In some aspects, the module 1312 CSI processing may be configured to perform the determining part or in full, for example, based on the transmissions received from a STA, such as changes in the channel state. Transmission can be received using the receiving module 1304, for example.

[0195] Next, in step 1604, is transmitted to the frame of the packaging. Frame package may contain a control field indicating certain MCS or the transmission speed, and at least one field indicating that at least part of the information channel state information is requested. Frame packing may contain Packed the NDPA frame, as discussed above in relation to Fig. 9A, or Packed polling message, as described above in relation to Fig. 10. Frame packing can be transmitted by the transmitting module 1306, for example.

[0196] Fig. 17 illustrates an aspect of a station (STA) 1700 for use within system 100. STA 1700 may contain any of the user terminal 120 illustrated in Fig. 1 or Fig. 2. As discussed above, the STA 170 may be implemented as a wireless device, for example, the wireless device illustrated in Fig. 3. STA 1700 can be used to communicate with AR, as described above in relation to Fig. 4-Fig. 12.

[0197] the STA 1700 may include receiving module 1702 for receiving the NDPA frame and/or the CSI survey. For example, the receiving module 1702 may be configured to accept the frame 402 or 422 NDPA and/or any of the polls 412, 416 CSI. In addition, the receiving module 1702 may be configured to accept the NDP frame and the frames that contain Packed footage NDPA or Packed polling messages. The received data can be demodulated, converted to a lower frequency or otherwise processed by the receiver module 1702 or by another module. Receiving module 1702 may be implemented using a receiver, such as receiver 312, illustrated in Fig. 3, or a combination of receivers, e.g. receivers 254m-254mu or 254xa-254xu illustrated in Fig. 2. Receiving module 1702 may be implemented as a transceiver and may include a demodulator and/or the received data processor, for example, RX-CPU 270 of the data. In some aspects, the receiving module 1702 comprises an antenna or transceiver, for example the antenna of the transceiver 252 and 254. The transceiver may be configured to demodulate incoming wireless messages. Messages can be taken after�STV antenna.

[0198] the STA 1700 can also include a module 1704 for determining the CSI feedback. The module 1704 CSI feedback may be configured to determine the CSI feedback based on the received NDP frame associated with the adopted NDPA frame. CSI can be expressed in matrix form as discussed above. The parameters of the CSI feedback in some aspects may be determined by the module 1704 CSI feedback. In some aspects, the CSI feedback module configured to determine the MCS based on the transfer of, such as package management, which is adopted by the receiving module 1702. For example, the CSI feedback module may determine the MCS for CSI using the NT-management included Packed in the NDPA frame, as described above in relation to Fig. 9A.

[0199] the Module 1704 CSI feedback may be configured to determine whether to calculate standard/full CSI, or calculate whether the difference between the previous current CSI and CSI. For example, a module 1704 CSI feedback can evaluate the field last saved SF or previous field stored in SF NDPA as the conditions of the channel, as discussed above. If the condition of the channel in General is similar to the condition when he was saved the previous SF module 1704 CSI feedback may determine that no CSI will not be sent. In some aspects, the module 1704 CSI feedback can�t to determine what SF was stored in AR, and can calculate the difference data to send to AP to calculate the current SF. Definition module 1704 CSI feedback can be included in the CSI feedback, for example feedback CSI 408 illustrated in Fig. 11 and Fig. 12. In some aspects of the definition can be reflected zero field CSI, a difference CSI, zero field SF field use previous SF, zero field CSI and CSI difference and/or one or more values in a reserved field, such as field of the first segments and the remaining segments. The cause which led to the fact that the module 1704 feedback CSI is not sent CSI, can be reflected with the help of a missed field NDPA/NDP, the field difference CSI, zero field SF field use previous SF, zero field CSI and CSI difference and/or fields who become reserved, when it is determined that no CSI won't be transmitted, for example, in the transmission of CSI feedback transmitted to the AR In some aspects, the module 1704 feedback of CSI is configured to generate the transmission of feedback of CSI, having a duration that reflects that CSI will not be shared. In some aspects, the module 1704 CSI feedback may determine that the feedback CSI is not transmitted because of transmission constraints, such as limiting PPDU or TXOP.

[0200] M�Dul 1704 CSI feedback may further be configured to determine any of the other information described above in relation to feedback CSI 408. In some aspects the functionality of the module 1704 CSI feedback is implemented using at least the controller 280 and/or block 278 evaluation of channels. In some aspects, the module 1704 CSI feedback includes a quantizer to quantize the angles and/or entries in the matrix indicating the CSI.

[0201] the STA 1700 may further comprise a module 1706 adjust the transfer rate to determine the variable speed transmission to send feedback CSI defined using the module 1704 CSI feedback. For example, a module 1706 adjust the transmission speed can increase PHY-transmission rate for sending the CSI feedback when the last traded SF in one or more frames taken NDPA reflects that the feedback CSI, which passed the STA 1700, was successfully adopted. In this way the module 1706 adjust the transmission speed can reduce the transmission rate, such as PHY-transmission rate, if the last traded SF field SF last saved field or previous saved SF reflects that passed before SF was not accepted or cannot be saved. In some aspects, the module 1706 adjust the transmission speed can adjust the parameters of the CSI feedback, for example modulation return �ligature CSI. Module 1706 adjust the transmission speed can determine or adjust the transmission rate based on the control field in the package, as discussed above. Module 1706 adjust the baud rate can also be configured to determine the transmission rate at which a message is accepted, for example the polling message, for example, the receiving module 1702.

[0202] the Module 1706 adjust the transmission speed can be configured to execute any of the procedures variable speed transmission described above in relation to Fig. 7. In some aspects the functionality of the module 1706 variable speed transmission is realized using at least the controller 280. In some aspects, the module 1706 adjusting the speed of the transmission finds the values or parameters in the memory block, such as block 282 memory, for example, to determine the appropriate transmission rate or regulation.

[0203] the STA 1700 further comprises a transmitting module 1708 for transmission of CSI feedback. For example, the transmitting module 1708 may be configured to transmit CSI feedback, a specific module 1704 CSI feedback. The transmitting module may be configured to transmit the transmission rate defined by the module 1706 adjust the baud rate or another parameter t�Lenno module 1706 variable speed transmission. In some aspects, the transmitting module 1708 configured to wirelessly transmit CSI feedback, for example, AP 110. Transmitting module 1708 may be implemented using a transmitter, such as transmitter 310 illustrated in Fig. 3, or a combination of transmitters, such as transmitters 254m-254mu or 254xa-254xu illustrated in Fig. 2. Transmitting module 1708 may be implemented as a transceiver and may include a modulator and/or the processor data transfer, such as the TX-processor 288. In some aspects, the transmitting module 1708 comprises an antenna or transceiver, for example, the antenna of the transceiver 252 and 254. The transceiver may be configured to modulate outbound wireless messages directed to the AP. Messages can be transmitted through the antenna.

[0204] the Specialists in the art will appreciate the advantages of the various circuits, chips, modules and/or components, which may include both software and hardware, or both that can be used to implement the modules described above in relation to the STA 1700. One or more modules of the STA 1700 may be partially or wholly implemented in the processor 304, illustrated in Fig. 3.

[0205] Although described separately, it is clear that functional�m blocks, described in relation to AR 1300 and STA 1700, need not be separate structural elements. Similarly, one or more functional blocks or portions of the functionality of the various blocks may be implemented as a single chip. Alternatively, the functionality of a particular block may be implemented as two or more chips. Furthermore, additional modules or functionality may be implemented in AR 1300 and STA 1700, and components AR 1300 and/or the STA 1700 can be distributed in any of a variety of configurations. More or less connection between the various modules illustrated in Fig. 2, 3, 13 and 17, or between additional modules can be implemented.

[0206] Fig. 18 illustrates an aspect method 1800 transmission. The method may be carried out by the STA 1700, for example, to determine whether it has been transferred to SF is accepted and/or stored in AR. Although the presented method will be described in relation to elements of the STA 1700, specialists in the art it will be understood that other components may be used to implement one or more steps described herein.

[0207] In step 1802, the first request is the first request information, channel state, for example using the receiving module 1702. The first request may include the notification of a zero package �data or polling message, for example.

[0208] In step 1804 is transmitted the frame containing the information of the channel state. Information channel state can be determined with use of the module 1704 CSI feedback, for example, and can be transmitted using the transmitting module 1708, for example. Feedback CSI can be determined using the first request, received in step 1802.

[0209] With continued in step 1806, was adopted by the second query. The second query comprises a first indicator indicating whether the state information is channel adopted in response to the first request or was the information of channel state saved after the transfer. The second request can be received with use of receiver module 1702, for example. The second request may include the NDPA frame. In some aspects the second request is processed by the module 1704 CSI feedback and/or module 1706 adjust the transmission rate to determine whether to send the CSI feedback or to adjust a parameter, such as the transmission speed used to send the CSI.

[0210] Fig. 19 illustrates an aspect of 1900. The method may be carried out STA 1700, for example, to determine whether to pass the CSI, and in some aspects, to indicate for AR whether the transmitted CSI the CSI difference. Although the presented method will be described in relation to elements of the STA 1700, specialists in Dan�Oh the field of technology will be clear what other components can be used to implement one or more steps described herein.

[0211] In step 1902, a message indicating that the information of channel state requested, made, for example using the receiving module 1702. In some aspects the message contains the NDPA frame or polling message. The message may reflect whether passed before SF stored in AR.

[0212] then, in step 1904, it is determined whether to transmit the state information of the channel. The determination may be performed by module 1704 CSI feedback, for example. The module 1704 CSI feedback can assess whether the changed state of the channel and retained CSI in AR, for example, as described above.

[0213] When the 1906 is transmitted. The transmission may include the first indicator and the second indicator indicating the result of determination. If the first indicator and/or the second indicator to reflect that the information channel state information will be transferred, the first indicator and/or the second indicator may indicate whether the information channel state information indicating the difference between the current state information of the channel and above the accepted information of the channel state. The first indicator field can contain zero CSI, zero field SF and/or part of the field is zero CSI and CSI difference, for example. The second indicator can soda�to reap a field of difference CSI, field use of recent SF and/or part of the field is zero CSI and CSI difference, for example. The indicators may be determined by the module 1704 CSI feedback, for example. The transmission can be received using the receiving module 1304, for example. Transmission may contain CSI feedback, for example, the feedback CSI 408, or another transmission indicating whether the transmitted CSI. The transfer may be performed using the transmitting module 1708, for example.

[0214] Fig. 20 illustrates an aspect 2000. The method may be carried out STA 1700, for example, to determine an MCS for transmission of CSI. Although the presented method will be described in relation to elements of the STA 1700, specialists in the art it will be understood that other components may be used to implement one or more steps described herein.

[0215] In step 2002, the accepted frame of packaging, for example using the receiving module 1702. Frame package may contain a control field indicating the modulation scheme and coding (MCS) for transmitting status information of the channel and at least one field indicating that at least part of the information channel state information is requested. Frame packing may contain Packed the NDPA frame, as discussed above in relation to Fig. 9A, or Packed polling message, as described above� in relation to Fig. 10.

[0216] Then, in step 2004, at least part of the information of channel state, the requested frame is transmitted, for example using the transmitting module 1708, for example. The module 1704 CSI feedback and/or module variable speed transmission can extract the MCS of the control field in the received frame of the packaging to determine how to send the CSI. Information channel state information can be transmitted as CSI feedback, such as feedback CSI 408. Information channel state can be determined by the module 1704 CSI feedback, for example, as described above.

[0217] Fig. 21 illustrates an aspect method 2100 transmission. The method may be carried out AR 1200, for example, to determine that the information of channel state will not be accepted, and to determine why information channel state information is not transmitted from STA. Although the presented method will be described in relation to the elements of art 1200, specialists in the art it will be understood that other components may be used to implement one or more steps described herein.

[0218] In step 2102 is transmitted the request information of the channel state, for example, the transmitting module 1306. After that, in step 2104, accepted the transfer. The transmission may include the indicator. The transmission can be received using the receiving module 1304, for example.

[0219] the Pic�e, the mode of transmission is determined, because the link includes the information of channel state, based on the duration of the transfer in step 2106. Next, in step 2108, a condition that contributed to the lack of reception of the information of the channel state is determined based on the value of the indicator. The indicator may contain a field missed NDPA/NDP, the field of use previous SF and/or a field of zero CSI and CSI difference, as described above in relation to Fig. 12. The indicator may further contain bit, field, or other sign indicating whether it is possible to exceed the limit transmission by the information transmission channel state. The determination in step 2106, and/or in step 2108 may be implemented by the module 1314 processing the CSI for example.

[0220] Fig. 22 illustrates an aspect method 2200 transmission. The method may be carried out STA 1700, for example, to determine whether to pass the CSI, and to indicate for AR the reason why CSI is not transmitted. Although the presented method will be described in relation to elements of the STA 1700, specialists in the art it will be understood that other components may be used to implement one or more steps described herein.

[0221] In step 2202, the accepted message indicating that the information status of the requested channel, for example using the receiving module 1702. In some aspects the message contains the NDPA frame and�and a feedback message. The message may reflect, whether passed before SF in AR.

[0222] then, in step 2204, it is determined that there will be no information transmission channel state. The determination may be performed by the module 1704 CSI feedback, for example. The module 1704 CSI feedback can assess whether the changed information of the channel state information, stored whether CSI in AR and/or whether the frame that includes the CSI, to be too long to pass, for example, as described above.

[0223] When a transition to step 2206 is generated, the transmission containing the indicator. The length of the transmission based on the determination in step 2204. For example, the CSI feedback may be omitted to achieve a certain transmission duration. In addition, the indicator value based on the condition which was the cause of the lack of information transmission channel state. The indicator can contain a field of difference CSI, previous field SF and/or a field of zero CSI and CSI difference, for example. The indicator may further comprise bit, field, or other sign that indicates whether the transfer limit to be exceeded by transmitting the information of the channel state. Generating and/or determining the length or indicator value may be determined by the module 704 CSI feedback, for example. Transmission may contain CSI feedback, for example feedback CSI 408, or other transfer,pointing, that CSI will not be shared. The indicator may be included in the field of management of CSI feedback.

[0224] In step 2208 is transmitted. The transfer may be performed using the transmitting module 1708, for example.

[0225] Fig. 23 illustrates an aspect method 2300 transmission. The method may be carried out AR 1200, for example, to determine that the information of channel state will not be accepted, and to determine why information channel state information is not transmitted from STA. Although the presented method will be described in relation to the elements of art 1200, specialists in the art it will be understood that other components may be used to implement one or more steps described herein.

[0226] In step 2302 is transmitted the request information of the channel state, for example, the transmitting module 1306. After that, in step 2304, accepted the transfer. The transmission may include a first field to indicate whether the received first segment state information of the channel during transmission, and a second field for indicating a number of segments of the information of channel state, remaining in order to be accepted. The first and second fields can be part of a reserved field, such as field of the first segment and the remaining segments. The transmission can be received using the receiving module 1304, for example.

[0227] upon receiving the transfer is determined whether the transmission information of the channel state, based on the first field and the second field in step 2306. For example, it may be determined that no information channel state information is not included in the transfer, if the first field reflects that the first segment state information of the channel is not included in the transfer, and the value of the second field at least is so great, how much is a maximum for the number of remaining segments.

[0228] Next, in step 2308, a condition that contributed to the lack of reception of the information of channel state, it is determined if the first and second fields reflect that the transfer does not include information of the channel state. The condition may be determined based, at least partially, two or more bits, adjacent to the first field or the second field. For example, the bits that can be used for other purposes, can be reserved when the first and second fields reflect that the transfer does not include the state information of the channel, as described above in relation to Fig. 12. The determination in step 2306 and/or in step 2308 may be performed by a module 1314 processing CSI.

[0229] Fig. 24 illustrates the dimension 2400. The method may be carried out STA 1700, for example, to determine whether to pass the CSI, and to indicate for AR, which� CSI is not transmitted. Although the presented method will be described in relation to elements of the STA 1700, specialists in the art it will be understood that other components may be used to implement one or more steps described herein.

[0230] In step 2402, the accepted message indicating that the information status of the requested channel, for example using the receiving module 1702. In some aspects the message contains the NDPA frame or polling message. The message may reflect, whether passed before SF in AR.

[0231] thereafter, in step 2404 generates transmission. The transmission may include a first field to indicate whether the transmitted first segment state information of the channel during transmission, and a second field for indicating a number of segments of the information channel state information remaining to be transmitted. The first and second fields can be part of a reserved field, such as field of the first segment and the remaining segments. Generation can be implemented by the module 1704 CSI feedback, for example. The module 1704 CSI feedback can assess whether the changed information of the channel state information, stored whether CSI in AR and/or whether the frame that includes the CSI, to be too long to pass, for example, as described above. Transmission may contain CSI feedback, for example, feedback 48 CSI.

[0232] When a transition to step 2406 many bits in the transmission is set to indicate the condition, contributing to the state information of the channel is not enabled, if the first field and the second field reflect that the transfer does not include information of the channel state. Multiple bits may indicate that a previous request state information of the channel was not accepted that the current state information of the channel in General is similar to the transmitted first information channel state or the streaming limit may be exceeded by transmitting the information of channel state, for example. Setting multiple bits can be executed by a module 1704 CSI feedback, for example. Multiple bits may be included in the field of management of CSI feedback.

[0233] In step 2408 is transmitted. The transfer may be performed using the transmitting module 1708, for example.

[0234] the Specialists in the art it will be clear that there has been described a simple and clean frame format for transmission of CSI feedback. In some aspects of AID STA can be included in the NDPA. May not be an indication of the number of STA in NDPA in some aspects, although this information can be derived on the basis of the length of the NDPA. In some aspects, the information regarding whether SF is accepted and stored in AR, can be included in the NDPA. In not�which aspects of the information, does CSI STA included in the CSI feedback transmitted to the AR In some aspects of packaging used for indication of parameters for STA to use when transmitting SF.

[0235] In some aspects of any field is not defined for the STA "the first defendant". First specified STA-AID may implicitly reflect that the first defendant in one aspect. NDPA and the CSI survey can pass on the relevant sequence number, to enable the STA to obtain the compliance of the survey with the corresponding CSI NDPA. In this way the sequence number may be copied into the field of management, transmitted to the STA.

[0236] the Various operations of methods described above may be performed using any suitable means capable of perform the corresponding functions. The means may include various components (components) and/or module (s) of hardware and/or software, including but not limited to) scheme, a specialized integrated circuit (ASIC) or a processor. In General, where there are operations, module, or phases, are illustrated in figures, those operations may have corresponding equivalent components type a "means plus function". For example, the user terminal may include a means of receiving the information request link-state, a means of determining the parameters of information �condition of the channel based on the information, included in the request, a means of determining the state information of the channel based, at least in part, of certain parameters and the transmission medium of a frame containing at least a part of a particular information channel state.

[0237] Fig. 25 illustrates a block diagram of an exemplary user terminal 2500 in accordance with some aspects of the present invention. User terminal 2500 comprises a receiving module 2505, which can be configured to perform the functions of receiving means discussed above. In some aspects, the receiving module may correspond to one or more receivers 254 of Fig. 2. User terminal 2500 further comprises a determining module 2510, which may be configured to perform the functions of the means of definition discussed above. In some aspects, the determining module may correspond to the controller 280 of Fig. 2. User terminal 2500 further comprises a transmitting module 2515, which can be configured to perform the functions of transmission facilities discussed above. In some aspects, the transmitting module may correspond to one or more transmitters 254 of Fig. 2.

[0238] In the sense that is used here, the term "determining" encompasses a wide range of days�Vij. For example, "determining" can include calculating, computing, processing, removal, research, search (e.g., searching in a table, a database or another data structure), ascertaining and the like. Also, "determining" may include receiving (e.g., receiving information), accessing (e.g., accessing data in the data memory) and the like. Also, "determining" can include resolving, selecting, choosing, establishing and the like.

[0239] In the sense that is used here, the phrase referring to "at least one" of the list of items refers to the combination of these items, including individual members. For example, at least one of: a, b, or c" is expected to cover: a, b, c, a-b, a-c, b-c and a-b-c.

[0240] the Various operations of methods described above may be performed using any suitable means capable of carrying out these operations, such as a different component (components), circuit and/or module (s) of hardware and/or software. In General, any operations illustrated in the figures, can be performed corresponding functional means capable of carrying out these operations.

[0241] the Various illustrative logical blocks, modules, and circuits described in connection with the present invention may be implemented or performed � using the General-purpose processor, processor digital signal processing (DSP), specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device (PLD), schemes for discrete components or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described here. The General-purpose processor may be a microprocessor, but in the alternative, the processor may be any commercially available processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, such as the combination of DSP and microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

[0242] In one or more aspects, the functions described may be implemented in hardware, software, software-hardware, or any combination thereof. When implemented in software, the functions may be stored or transmitted as one or more commands or code on a computer readable medium. Machine-readable media includes both computer storage media and means of communication, including l�battle carrier facilitate the transfer of computer programs from one point to another. The data medium may be any available media, access to which can be done by computer. As an example, but not limitation, such computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to transmit or store desired program code in the form of commands or data structures and which can be done by computer. Any suitable connection is called machine-readable media. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Magnetic optical disk and disc, as used here, includes compact disc (CD), laser disc, optical� disk digital versatile disk (DVD), floppy disk and blu-ray disc where disks usually reflect data magnetically, while optical discs reflect the data optically with lasers. Thus, in some aspects computer readable media can include non-transit computer readable medium (e.g., tangible media). In addition, in some aspects computer readable media may include transit machine-readable medium (e.g., signal). Combinations of the above should also be included within the machine-readable media.

[0243] Disclosed here are methods contain one or more steps or actions for achieving the described method. The steps of the method and/or operations that can replace each other without going beyond the scope of the claims. In other words, not yet defined the specific order of the steps and actions, the order and/or use of specific steps and/or actions may be modified without going beyond the scope of the claims.

[0244] the functions Described may be implemented in hardware, software, software-hardware, or any combination thereof. When implemented in software, the functions may be stored as one or more commands on a computer readable medium. Machine-readable but�RER can be any available media that which can be done by computer. As an example, but not limitation, such computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to transmit or store desired program code in the form of commands or data structures and which can be done by computer. Magnetic optical disk and disc, as used here, includes compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and blu-ray®disc where disks usually reflect data magnetically, while optical discs reflect the data optically with lasers.

[0245] Thus, certain aspects may include a computer program product to perform operations presented here. For example, such computer program product may include machine-readable media on which are stored (and/or encoded) commands to be executed by one or more processors to perform operations described here. With regard to some aspects, a computer program product may include packaging mother�L.

[0246] the Software or commands may also be transmitted via a transmission medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of transmission medium.

[0247] in addition, it should be understood that the modules and/or other suitable means for implementing the methods and techniques described herein may be downloaded and/or otherwise obtained user terminal and/or base station accordingly. For example, such a device can be connected to the server to simplify the movement means of implementing the methods described here. Alternatively, various methods described herein can be provided via storage media (e.g., RAM, ROM, a physical storage medium such as a compact disc (CD) or floppy disk, etc.) so that the user terminal and/or base station can obtain the various methods upon coupling or granted�and data carrier device. Moreover, it can be used any other suitable method of providing device methods and techniques described herein.

[0248] it Should be understood that the invention is not limited to the precise configuration and components illustrated above. Various modifications, changes and variations can be made regarding the structure, operation and details of the methods and devices described above, without going outside the scope of the claims.

[0249] Then, as mentioned above is directed to aspects of the present invention, and the following other aspects of the invention can be designed without exits outside of the main volume, and their volume is defined by the following claims.

1. Method for wireless communication, comprising:
receiving a broadcast request information channel state information at the device;
the definition of the parameter information of the channel state on the basis of information included in the request;
the definition information channel state information based, at least partially, certain parameters; and
the transmission of a frame containing at least a part of a particular information channel state.

2. A method according to claim 1, wherein the request contains a field indicating the identifier of a device from which the information is requested state of the channel.

. A method according to claim 2, wherein the field contains 12 bits.

4. A method according to claim 2, wherein the request is received at the first device, and wherein the method further comprises determining that the first device referred to by the identified identifier of the Association.

5. A method according to claim 1, wherein at least one of the parameters contains a number of columns of the matrix for the information of channel state, which is requested, and wherein the request contains a field indicating the said amount.

6. A method according to claim 5, in which the field contains at least 3 bits.

7. A method according to claim 5, wherein at least a part of a particular information channel state is represented as a matrix containing the number of columns equal to the number specified in the mentioned field.

8. A method according to claim 1, wherein the information comprises at least one bit indicating whether the state information of the channel used for the record the only user or Protocol multiple users.

9. A method according to claim 1, wherein the request includes a notification of a zero data packet containing the sequence number, and in which the transmitted frame contains data indicating the sequence number.

10. A method according to claim 1, wherein the transmitted frame contains a control field that indicates certain parameters.

11. Ability� according to claim 1, further comprising determining a bandwidth of a particular information channel state on the basis of certain parameters.

12. A method according to claim 11, wherein the request comprises a first indicator indicating that requested the information of channel state for a single user or for multiple users, and the second indicator indicating the number of columns of the matrix for the information of channel state, which is requested.

13. A method according to claim 11, in which a certain bandwidth is indicated in the frame.

14. A method according to claim 1, further comprising:
the reception of the polling message requesting an additional portion of the
certain information of channel state; and
the additional frame containing the additional portion of the specific information of the channel state.

15. Wireless communication device, comprising:
a receiver configured to receive a broadcast information request for the channel state;
processing system configured to determine parameters of information of the channel state on the basis of information included in the request, and information to determine channel state information based, at least partially, certain parameters; and
a transmitter configured to transmit the frame containing�nd at least some specific information of the channel state.

16. The device according to claim 15, in which the query contains a field indicating the identifier of a device from which the information is requested state of the channel.

17. The device according to claim 16, in which the field contains 12 bits.

18. The device according to claim 16, in which the processing system is additionally configured to determine that the device referred to by the identified identifier of the Association.

19. The device according to claim 15, wherein at least one of the parameters contains the number of columns of the matrix for the information of channel state, which is requested, and wherein the request contains a field indicating the said amount.

20. The device according to claim 19 wherein the field contains at least 3 bits.

21. The device according to claim 19, wherein at least a part of a particular information channel state is represented as a matrix containing the number of columns equal to the number specified in the mentioned field.

22. The device according to claim 15, in which the information comprises at least one bit indicating whether the state information of the channel used for the record the only user or Protocol multiple users.

23. The device according to claim 15, wherein the request includes a notification of a zero data packet containing the sequence number, and in which the transmitted frame contains d�record, pointing mentioned sequence number.

24. The device according to claim 15, in which the transmitted frame contains a control field that indicates certain parameters.

25. The device according to claim 15, in which the processing system is configured to determine the bandwidth of certain information of the channel state on the basis of certain parameters.

26. The device according to claim 25, wherein the request comprises a first indicator indicating that requested the information of channel state for a single user or for multiple users, and the second indicator indicating the number of columns of the matrix for the information of channel state, which is requested.

27. The device according to claim 25, in which a certain bandwidth is indicated in the frame.

28. The device according to claim 15, wherein the receiver further configured to receive the polling message requesting an additional portion of the specific information of the channel state, and wherein the transmitter is further configured to transmit an additional frame containing the additional portion of the specific information of the channel state.

29. Wireless communication device, comprising:
a means of receiving a broadcast request information of channel state;
a means of determining the parameters info�information channel state on the basis of information included in the request;
a means of determining the state information of the channel based, at least partially, certain parameters; and
the means of transmission of a frame containing at least a part of a particular information channel state.

30. The device according to claim 29, wherein the request includes a field that specifies the identifier of a device from which the information is requested state of the channel.

31. The device according to claim 30, in which the field contains 12 bits.

32. The device according to claim 30, wherein the device further comprises means for determining that a device identified by the identifier of the Association.

33. The device according to claim 29, wherein at least one of the parameters contains the number of columns of the matrix for the information of channel state, which is requested, and wherein the request contains a field indicating the said amount.

34. The device according to claim 33, in which the field contains at least 3 bits.

35. The device according to claim 33, wherein at least a part of a particular information channel state is represented as a matrix containing the number of columns equal to the number specified in the mentioned field.

36. The device according to claim 29, in which the information comprises at least one bit indicating whether the state information of the channel to be used for Protocol�and the only user or Protocol multiple users.

37. The device according to claim 29, wherein the request includes a notification of a null data packet, and the notification of a zero data packet contains a sequence number and wherein the transmitted frame contains data indicating the mentioned sequence number.

38. The device according to claim 29, in which the transmitted frame contains a control field that indicates certain parameters.

39. The device according to claim 29, further comprising means for determining the bandwidth of certain information of the channel state on the basis of certain parameters.

40. The device according to claim 39, wherein the request comprises a first indicator indicating that requested the information of channel state for a single user or for multiple users, and the second indicator indicating the number of columns of the matrix for the information of channel state, which is requested.

41. The device according to claim 39, in which a certain bandwidth is indicated in the frame.

42. The device according to claim 29, further comprising:
means of reception of the polling message requesting an additional portion of the specific information of channel state; and
the means of transmission of an additional frame containing an additional part of a particular information channel state.

43. Machine-readable media containing commands that, when run� a computer cause the computer to perform a method of wireless communication, contains:
receiving a broadcast request information of channel state;
the definition of the parameter information of the channel state on the basis of information included in the request;
the definition information channel state information based, at least partially, certain parameters; and
the transmission of a frame containing at least a part of a particular information channel state.

44. The access terminal that contains:
at least one antenna;
a receiver configured to receive via at least one antenna broadcasts the request to the information of channel state;
processing system configured to determine parameters of information of the channel state on the basis of information included in the request, and information to determine channel state information based, at least partially, certain parameters; and
a transmitter configured to transmit the frame containing at least a part of a particular information channel state.

45. Method for wireless communication, comprising:
the transfer request information of the channel state information to one or more devices, wherein the request includes a field identifying each of one or more devices and identifying parameters for each of one or more devices to be used for Oprah�the allocation information of channel state;
the reception of the frame containing the state information of the channel from at least one of the one or more devices in response to the request, wherein the status information of the channel was determined based, at least in part, of the parameters specified in the request.

46. A method according to claim 45, further comprising determining one or more parameters specified by a query, based on whether the information link-state Protocol used for single user or Protocol multiple users.

47. A method according to claim 45, in which field indicating each device from the one or more devices contains the ID of the Association for each device, each identifier of the Association contains 12 bits.

48. A method according to claim 45, wherein at least one of the parameters contains a number of columns of the matrix for the information of channel state, which is queried, the query contains a field indicating the said number, wherein the field contains at least 3 bits.

49. A method according to claim 45, wherein the request includes a notification of a null data packet, and the notification of a zero data packet contains a sequence number, and in which the received frame contains data indicating the mentioned sequence number.

50. A method according to claim 45, up to�omnitele containing processing the information received channel state using the parameters, specified in the transmitted request.

51. A method according to claim 45, in which the received frame contains a control field indicating parameters of the received information of the channel state, with the parameters specified in the control field, based, at least partially, the parameters specified in the transmitted request.

52. A method according to claim 51, further comprising processing the information received channel state using the parameters specified with the control field.

53. A method according to claim 45, further comprising:
the transmission of the polling message requesting additional information channel state information from at least one of the one or more devices; and
receiving an additional frame containing additional information of the channel state.

54. Wireless communication device, comprising:
a transmitter configured to transmit the broadcast information of the channel state information to one or more devices, wherein the broadcast request includes a field identifying each of one or more devices and identifying parameters for each of one or more devices to be used in determining the information of channel state; and
a receiver configured to receive a frame containing status information�I channel, from at least one of the one or more devices in response to the request, wherein the status information of the channel was determined based, at least in part, of the parameters specified in the request.

55. The device according to claim 54, further comprising the processing system configured to determine one or more parameters specified by a query, based on whether the information link-state Protocol used for single user or Protocol multiple users.

56. The device according to claim 54, in which field indicating each device from one or more devices contains the ID of the Association for each device, each identifier of the Association contains 12 bits.

57. The device according to claim 54, wherein at least one of the parameters contains a number of columns of the matrix for the information of channel state, which is queried, the query contains a field indicating the said number, wherein the field contains at least 3 bits.

58. The device according to claim 54, wherein the request includes a notification of a null data packet, and the notification of a zero data packet contains a sequence number, and in which the received frame contains data indicating the mentioned sequence number.

59. The device according to claim 54, supplementary�containing additional processing system, configured to handle the received information of the channel state using the parameters specified in the transmitted request.

60. The device according to claim 54, in which the received frame contains a control field indicating parameters of the received information of the channel state, with the parameters specified in the control field, based, at least partially, the parameters specified in the transmitted request.

61. The device according to claim 60, further comprising the processing system configured to handle the received information of the channel state using the parameters specified with the control field.

62. The device according to claim 54, wherein the transmitter is further configured to transmit a polling message requesting additional information channel state information from at least one of the one or more devices, and wherein the receiver is further configured to accept the additional frame containing additional information of the channel state.

63. Wireless communication device, comprising:
the means of transmission of broadcast information request for the channel state information to one or more devices, wherein the broadcast request includes a field that identifies each one of these or Bo�its devices and identifying parameters for each of one or more devices, to be used when determining the information of channel state; and
means receiving the frame containing the state information of the channel from at least one of the one or more devices in response to the request, wherein the status information of the channel was determined based, at least in part, of the parameters specified in the request.

64. The device according to claim 63, further comprising means for determining one or more parameters specified by a query, based on whether the information link-state Protocol used for single user or Protocol multiple users.

65. The device according to claim 63, in which field indicating each device from the one or more devices contains the ID of the Association for each device, wherein the identifier of the Association contains 12 bits.

66. The device according to claim 63, wherein at least one of the parameters contains a number of columns of the matrix for the information of channel state, which is queried, the query contains a field indicating the said number, wherein the field contains at least 3 bits.

67. The device according to claim 63, wherein the request includes a notification of a zero data packet, wherein the notification of a zero data packet contains a sequence number, and inwhich the received frame contains the data pointing mentioned sequence number.

68. The device according to claim 63, further comprising means for processing the received information of the channel state using the parameters specified in the transmitted request.

69. The device according to claim 63, in which the received frame contains a control field indicating parameters of the received information of the channel state, with the parameters specified in the control field, based, at least partially, the parameters specified in the transmitted request.

70. The device according to claim 69, further comprising means for processing the received information of the channel state using the parameters specified with the control field.

71. The device according to claim 63, further comprising:
the means of transmission of a polling message requesting additional information channel state information from at least one of the one or more devices; and
means taking more of the frame containing the additional information of the channel state.

72. Machine-readable media containing commands that, when
performing by a computer cause the computer to perform a method of wireless communication, comprising:
the transmission of broadcast information request for the channel state information to one or more devices, wherein the broadcast request includes a field that �identificarse each of these one or more devices and identifying parameters for each of these one or more devices, to be used when determining the information of channel state; and
the reception of a frame containing information channel state information from at least one of the one or more devices in response to the request, wherein the status information of the channel was determined based, at least in part, of the parameters specified in the request.

73. The access point that contains:
at least one antenna;
a transmitter configured to transmit via the at least one antenna, the broadcast information of the channel state information to one or more devices, wherein the broadcast request includes a field identifying each of these one or more devices and identifying parameters for each of one or more devices to be used in determining the information of channel state; and
a receiver configured to receive the frame containing the state information of the channel from at least one of the one or more devices in response to the request, wherein the status information of the channel was determined based, at least in part, of the parameters specified in the query.



 

Same patents:

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to communication. During channel selection, a control unit (208) selects a resource used in sending a response signal from among specific PUCCH resources notified in advance from a base station (100) and PUCCH resources mapped to a CCE, and controls the transmission of the response signal. A response signal generating unit (212) supports implicit signalling with respect to any given response signal, and at the same time as supporting LTE recovery from 2CC, uses a mapping method which, through bits, levels the amount of PUCCH resources which can determine ACK/NACK simply by determining the PUCCH resource regarding which the response signal was transmitted.

EFFECT: capacity of a terminal device to improve the characteristics of a response signal having poor transmission characteristics when ARQ is used in communication using an uplink unit band and a plurality of downlink unit bands associated with the uplink unit band.

20 cl, 52 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to a method of transmitting data telegrams (13a, 13b) from a transmitter (11a) to at least one receiver (11b), wherein the data telegrams (13a, 13b) to be transmitted are associated with a priority level which, during transmission of the corresponding data telegram (13a, 13b), specifies a priority to be considered. In the transmitter (11a) each priority level is associated with an intermediate storage area (17a, 17b); the data telegrams (13a, 13b) are transmitted over a physical communication medium (12) through different logical data connections (15a, 15b), wherein the number of logical data connections (15a, 15b) corresponds to the number of priority levels; data telegrams (13a) in the intermediate storage area (17a) associated with a lower priority level are transmitted through the logical data connection (15a) associated with said priority level until at least one data telegram (13b) is present in the intermediate storage area (17b) associated with a higher priority level, and the data telegram (13b) in the intermediate storage area (17b) associated with the higher priority level is transmitted through the logical data connection (15b) associated with the higher priority level.

EFFECT: transmitting data telegrams with different priority levels at a relatively low cost and therefore faster.

9 cl, 2 dwg

FIELD: radio engineering, communication.

SUBSTANCE: present invention relates to a wireless communication system and is intended to determine time synchronisation shift between radio base stations. A time synchronisation method comprises receiving, from a first radio base station, a first time advance value used by user equipment to control transmission timing thereof before handover and measure random access preamble reception timing. The random access preamble is transmitted from the user equipment to a second radio base station during synchronisation. The method also comprises receiving, from the second radio base station, a second time advance value used by the user equipment to control transmission timing thereof after handover, and determining time synchronisation shift between the first and the second radio base stations based on the received second time advance value, second time advance value and reception timing measurement.

EFFECT: high accuracy of time synchronisation.

20 cl, 12 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to long term evolution (LTE) mobile communication. Disclosed is a mobile communication method which includes: transmitting, from a mobile station (UE) to a radio base station (eNB), a measurement report including a measurement result of a MeasObject, when the UE links and stores a MeasID, the MeasObject and a ReportConfig, and when the UE determines that the ReportConfig is satisfied; and determining, in the UE, whether to release the MeasID according to a type of a carrier designated by the MeasObject, when a change has occurred in a combination of the primary carrier and the secondary carriers.

EFFECT: facilitating change and removal of MeasID when communicating with carrier aggregation.

4 cl, 9 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to communication systems. The mobile communication method according to the present invention includes a step of transmitting, by a radio base station eNB, a RRC Connection Reconfiguration message instructing to add a new downlink elementary carrier to a mobile station UE; a step of calculating, by the mobile station UE, power margin based on loss in the transmission circuit, estimated based on a new downlink elementary carrier, in response to the RRC Connection Reconfiguration message; and a step of transmitting, by the mobile station UE, a MAC Control Element containing the power margin to the radio base station eNB.

EFFECT: enabling fast scheduling for uplink elementary carriers.

2 cl, 5 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to methods of reporting channel quality indicator (CQI) in a wireless communication network. A CQI request may be sent in a first subframe. The CQI may be measured for a second subframe having a first offset from the first subframe, and a corresponding CQI report is sent in a third subframe having a second offset from the first subframe.

EFFECT: reduced use of signalling resources.

30 cl, 2 tbl, 12 dwg

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to methods of managing acknowledgement messages from multiple destinations for multi-user multiple-input multiple-output (MU-MIMO) transmissions. Certain aspects of the present invention relate to an apparatus and methods for managing acknowledgement messages from multiple destinations for MU-MIMO transmissions. According to certain aspects, a polled block acknowledgement (BA) mechanism can be considered mandatory to an acknowledgement protocol, and a sequential (or other type of scheduled/deterministic) mechanism can be considered optional.

EFFECT: higher throughput.

67 cl, 9 dwg

FIELD: radio engineering, communication.

SUBSTANCE: method includes specifying source data, creating a probabilistic network graph in each statistical experiment, simulating movement of subscribers, generating an initial topology and structure of heterogeneous networks, wherein the source data for simulation are generated based on the topological structure of a real network and then simulating the arrangement of heterogeneities in the given fragment and the arrangement of elements in each heterogeneity.

EFFECT: high reliability of simulating communication networks, enabling simulation of communication network fragments, invariantly available, based on physical and geographical conditions of the location and topological heterogeneities arising during network development.

6 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to a mobile communication system. The communication system has two or more multicast-broadcast single-frequency network (MBSFN) areas, in each of which multimedia broadcast multicast service (MBMS) is provided at one frequency. A base station belonging to a plurality of MBSFN areas transmits scheduling information for each multicast control channel (MCCH) of the plurality of MBSFN areas through a broadcast control channel (MCCH). A mobile terminal receives scheduling information transmitted from a base station. The scheduling information includes a MCCH repetition period and the value of the initial point of the MCCH, corresponding to each of the plurality of MBSFN areas.

EFFECT: high efficiency of mobile terminal mobility management.

5 cl, 103 dwg

FIELD: radio engineering, communication.

SUBSTANCE: disclosed mobile communication system includes a LTE system which does not support circuit-switched communication, a 2G/3G system which supports circuit-switched communication and an IMS subsystem. The mobile communication system realises SRVCC support and is configured to change paths of a VolP media data signal and a VolP control signal in a first communication state, when a mobile station resides in a LTE system, to paths of circuit-switched communication signal, a VolP media data signal and a VolP control signal in a second communication state, when the mobile station resides in a 2G/3G system, in the resident network of said mobile station.

EFFECT: enabling continuous voice communication within a network when switching between first and second communication states.

2 cl, 26 dwg

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to means of transmitting data packets. The method comprises encapsulating a data segment for a higher layer data packet in a lower layer data packet, wherein the higher layer data packet includes logical link control (LLC) protocol data units (PDU) and the lower layer data packet includes radio link control (RLC) data blocks for transmission over an enhanced general packet radio service (EGPRS) network; adding a new packet indicator set to a predetermined value to the lower layer data packet header if the data segment comprises the beginning of a new higher layer data packet to indicate the start of a new higher layer data packet; adding a length indicator to the lower layer data packet header if the data segment comprises the end of a higher layer data packet, wherein adding a new packet indicator includes adding a new packet indicator to a lower layer data packet only when the lower layer data packet begins from the new higher layer data packet segment.

EFFECT: reduced errors when segmenting and merging data packets.

12 cl, 8 dwg

FIELD: radio engineering, communication.

SUBSTANCE: device includes a unit transmission pulse counter, a transmission control unit, a transmission memory unit, a transmission parameter determining unit, a digital transmission system, a unit reception pulse counter, a reception control unit, a reception memory unit, a reception parameter determining unit, a comparator, transmission frame analysis units and a reception frame analysis unit.

EFFECT: high reliability of detecting single and multiple errors in a variable-length Ethernet frame and detecting alternating single and multiple failures in the digital data transmission system under analysis.

3 cl, 4 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to methods of reporting channel quality indicator (CQI) in a wireless communication network. A CQI request may be sent in a first subframe. The CQI may be measured for a second subframe having a first offset from the first subframe, and a corresponding CQI report is sent in a third subframe having a second offset from the first subframe.

EFFECT: reduced use of signalling resources.

30 cl, 2 tbl, 12 dwg

FIELD: radio engineering, communication.

SUBSTANCE: device contains the first, the second and third validity increase units, the first and the second data transmission channels, a repeated request signal output and information output, the first and the second input units, five NOT elements, four AND elements, four keys, and an OR element. The first outputs of validity increase units are informational, and the second ones are the control signal of codogram receiving correctness. The OR element output is the device information output, and the fourth AND element output is the device repeated request output.

EFFECT: channel bandwidth increase due to the lower number of repeated requests owing to better information receiving accuracy.

1 dwg

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to a method of correcting parameters when matching data rate based on multilevel mapping. The method includes steps of: obtaining a number of levels for multilevel mapping and determining a transmission mode for communication session content; and correcting parameters when matching the data rate in LTE release 10 protocol in accordance with the obtained number of levels and the determined transmission mode. The present invention also provides an apparatus for correcting parameters when matching data rate based on multilevel mapping, which includes a parameter correction unit, a transmission mode determining unit and a unit for obtaining the number of levels, connected to the parameter correction unit; wherein the transmission mode determining unit can determine the transmission mode for the communication session content and inform the parameter correction unit on the transmission mode; the unit for obtaining the number of levels can obtain the number of levels for multilevel mapping and inform the parameter correction unit on the number of levels; the parameter correction unit corrects parameters when matching data rate.

EFFECT: providing adaptation of parameters when matching data rate on LTE releases 8 and 9 to new mapping types in the LTE release 10 protocol.

10 cl, 2 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to radio communication systems. A base station receives signal quality information reports from mobile stations every 480 ms using the slow associated control channel (SACCH) and receives codec mode requests from the mobile stations every 40 ms using adaptive multi-rate (AMR) in-band signalling. The base station associates the requested codec modes with estimated levels of speech quality currently being experienced by the first and second mobile stations.

EFFECT: controlling subchannel transmission power and allocating code modes for a first and a second mobile station based on estimated levels of speech quality associated with requested codec modes, and signal quality reports.

10 cl, 5 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to wireless communication. Certain aspects of the present disclosure relate to a low-overhead method for transmitting channel state information (CSI) feedback in very high throughput (VHT) wireless communication systems. The present disclosure also provides packet formats for null data packet announcement (NDPA), CSI Poll and CSI feedback.

EFFECT: using the disclosed protocol for CSI feedback segmentation in order to transmit media access control (MAC) protocol data unit (MPDU) or a physical layer (PHY) protocol data unit (PPDU).

100 cl, 14 dwg

FIELD: radio, communication.

SUBSTANCE: each flow of data flows set is coded according to appropriate speeds of data transfer, they perform shifts of data flows on the set of MIMO channels according to full shift of combinations, they transfer data flows subjected to shifting, decode and determine SNR for each of data flows, they calculate a summary metric SNR for the set of data flows, they provide a summary metric as a feedback, they determine a set of separate metrics SNR for data flows on the basis of the summary metric SNR, and speeds of data transfer are adjusted, on which data flows are coded, on the basis of separate metrics SNR.

EFFECT: increased efficiency of MIMO wireless communication system due to reduction of a volume of downlink resources, necessary for provision of feedback by efficiency of a channel, for adjustment of data transfer speeds on MIMO channels.

17 cl, 8 dwg

FIELD: radio engineering, communication.

SUBSTANCE: apparatus for demodulating radio signals with smoothly variable radio pulse ascent and descent comprises a transformer with a primary winding W11 and two secondary windings W21 and W22, two reference voltage sources U1 and U2, a pair of parallel-connected capacitor and resistor, threshold elements 1 and 2 and two diodes VD1 and VD2.

EFFECT: high reliability of converting pulsed radio signals with smoothly variable ascent and descent of video pulses of received information discreteness.

2 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to a transmitting device, a receiving device and a communication system. The technical result is achieved through a video data encoder, having an input for receiving stereoscopic image data. The stereoscopic image data include time-matching first and second image data. An error-correction encoding unit combines first image data units and corresponding second image data units from an input unit into a common encoding matrix. An error-correction code obtained from the combined units is added to the encoding matrix.

EFFECT: transmitting a plurality of video data with high resistance to packet loss and reduced delay.

14 cl, 10 dwg

FIELD: communications.

SUBSTANCE: device has multiple cascade registers and multiple adders. During receipt of control information series operator forms a series of check connection bits and sends it to adders. After finishing of receipt operator serially adds given input bit to output bits of last register and outputs a result. Source value controller sends to registers a value selected from two source values.

EFFECT: higher efficiency, broader functional capabilities.

8 cl, 7 dwg, 2 tbl

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