Dynamic channel quality reporting in wireless communication system

FIELD: information technology.

SUBSTANCE: methods of reporting channel quality indicators (CQI) are described. Data activity at a receiver may be determined, and CQI reporting by the receiver may be adjusted based on the determined data activity. In one design, CQI reporting may be enabled for a time window around each expected packet arrival for a periodic or quasi-periodic transmission and may be suspended outside of the time window. In another design, CQI reporting may be varied based on ACK/NACK feedback. In yet another design, CQIs may be sent at a first rate when data activity is not detected and at a second rate faster than the first rate when data activity is detected. In yet another design, CQIs may be sent only during discontinuous transmission (DTX) ON periods when data activity is not detected and may be sent during both DTX ON and OFF periods when data activity is detected.

EFFECT: efficient channel quality reporting in wireless communication system.

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The claim to priority under 35 U.S.C. 119

In this patent application claims the priority of provisional application U.S. serial number 60/847727, entitled "METHOD FOR DYNAMIC CHANNEL QUALITY REPORTING", registered on September 27, 2006, assigned to the assignee of the present application and is incorporated in this application by reference.

The technical field

The present disclosure of the invention in General relates to communications, and more specifically to techniques for messages about the quality of the channel in the wireless communications system.

The level of technology

In the wireless communication system transmitter, typically, processes (e.g., encodes and modulates) the traffic data for generating output elementary parcels. The transmitter then processes the output of the elementary parcels for forming radio frequency (RF) signal and transmits the RF signal over the wireless link. Wireless channel distorts the transmitted RF signal due to the characteristics of the channel and additionally degrades the RF signal due to noise and interference. The receiver receives the transmitted RF signal and handles the received RF signal to obtain samples. The receiver then processes (e.g., demodulates and decodes) the sample to obtain decoded data.

Good performance can be achieved PU is eat data wirelessly from the condition, what can be achieved with high bandwidth for data transfer. To facilitate this, the receiver can evaluate the quality of the wireless channel and report the quality of the channel to the transmitter. The transmitter may then adjust its transmission to the receiver based on the reported channel quality, to increase throughput.

Characteristics of the wireless channel may change over time due to various factors such as fading, multipath, interference, etc. the Receiver can periodically report the quality of the channel with a sufficiently high frequency to ensure that the transmitter can have the latest information about the quality of the channel. However, for communication quality of the channel transmitter consumed radioresource. Therefore, in the art there is a need for techniques for effective communication quality of a channel in a wireless communications system.

The invention

This document describes techniques for effective messages about the quality indicators channel (CQI) for wireless communication. One particular can decide the activity data on the receiver and reported CQI from the receiver can be configured based on the specific activity data. In one implementation, the activity data may be determined based on the expected revenue package is in for periodic or quasi-periodic transmission to the receiver. Message CQI can be resolved within a time window around each expected receipt of the package and may be suspended outside time window. In another implementation, the message CQI may vary and be based on feedback in the form of an acknowledgement (ACK) and negative acknowledgement (NACK), which may indicate a possible future activity data. For example, the message CQI may be suspended for a predetermined period of Tgtime after correctly decoding the packet, and may be renewed at the end of a predetermined period of time. Message CQI may be resolved after sending a NACK for packet decoded with an error.

In another execution of the CQI may be sent with the first frequency, when the activity data is not detected, and the second frequency greater than the first frequency when the detected activity data. Activity data can be detected when the receiver accepts the signaling or data. The lack of activity data may be declared when no signaling or data is not received within the predetermined period Tqtime since last received signaling or data.

The receiver can operate in the mode of discontinuous transmission (DTX), and he may be allowed to transmit data and signaling only during periods on the Chennai DTX. In one version CQI may be sent only during periods with DTX enabled when the activity data is not detected, and can go as during periods included with the DTX and DTX off when it detects the activity data. In this version, the CQI message has a higher priority than DTX off when it detects the activity data. CQI can also go with the first frequency and during periods with DTX enabled when the activity data is not detected, and can go with the second frequency greater than the first frequency, and during periods with DTX on and off when it detects the activity data.

Hereinafter be described in more detail various features and characteristics of disclosure.

Brief description of drawings

Figure 1 shows a wireless communications system.

Figure 2 shows a timing diagram for the physical channels in HSDPA.

Figure 3 shows an example of transmission for downlink and uplink communication in HSDPA.

Figa and 4B show the message CQI for the correctly decoded packets.

Figure 5 shows the message CQI for packets decoded with an error.

6 shows a message CQI with different frequencies depending on the activity data.

Fig.7 shows the message CQI in DTX mode.

Fig shows the% is, performed by the receiver, for example, UE.

Fig.9 shows a process performed by a transmitter, such as a Node B.

Figure 10 shows the block diagram of the UE and Node B.

Detailed description

Figure 1 shows a system 100 for wireless communication with multiple Nodes 110 B and user equipment (UE) 120. The node B, as a rule, is a fixed station that communicates with the UES and may also be called an enhanced Node B (eNB), base station, access point, etc., Every Node B 110 provides an area of radio communications for a specific geographic area and supports the communication with the UE located in the service area. The controller 130 system connects to the Node B 110 and provides coordination and control for these Node B. the Controller 130 can be a single network object or set of objects on the network.

UE 120 may be dispersed throughout the system, and each UE may be stationary or mobile. The UE may also be called a mobile station, terminal, access terminal, a subscriber unit, a station, etc. UE may be a cellular phone, a personal digital assistant (PDA), wireless device, handheld device, wireless modem, a portable computer, etc.

Described in this document technique can be used for various wireless communication systems, for example systems to llective access code division multiple access (CDMA), systems shared access with time division multiplexing (TDMA)systems, multiple access with channel separation frequency (FDMA)systems, orthogonal FDMA (OFDMA), FDMA systems with single-carrier (SC-FDMA), etc. the Terms "system" and "network" are often used interchangeably. A CDMA system may implement a radio technology such as ground access system UMTS (UTRA), CDMA2000, etc. UTRA includes wideband CDMA (W-CDMA) and CDMA with synchronized time division (TD-SCDMA). CDMA2000 covers standards IS-2000, IS-95 and is-856. A TDMA system may implement a radio technology such as global system for mobile communications (GSM). An OFDMA system may implement a radio technology such as enhanced UTRA (E-UTRA), ultra-wideband mobile communications (UMB), IEEE 802.20, IEEE 802.16 (WiMAX), Flash-OFDM, etc. UTRAN and E-UTRA are part of the universal mobile telecommunications system (UMTS). Long-term development (LTE) 3GPP is the upcoming release of UMTS that uses E-UTRA, which employs OFDMA on the downlink and SC-FDMA on the uplink communication. UTRA, E-UTRA, UMTS, LTE and GSM are described in documents from an organization named "Partnership Project Third Generation (3GPP). CDMA2000 is described in documents from an organization named "the Second Project Third Generation Partnership" (3GPP2). These different technologies and standards radiowa and known in the art. For clarity, some features of the methods described below for UMTS and 3GPP terminology is used hereinafter in greater part of the description.

In UMTS data for the UE can be processed as one or more transport channels at a higher level. Transport channels can transfer data to one or more services, such as voice, video, packet data, etc. of the Transport channels can be mapped to physical channels on a physical level. Physical channels can be formed using different canalobre codes and, accordingly, may be orthogonal to each other in code.

3GPP release 5 and above supports high-Speed packet access downlink (HSDPA), which is the set of channels and procedures, which enables high-speed packet data transmission on the downlink. For HSDPA Node B may send data at a high speed shared channel downlink (HS-DSCH), which is a transport channel downlink that is shared by the UE in the time and code domain. HS-DSCH can move the data to one or more UE in each time interval of transmission (TTI). Sharing the HS-DSCH may be dynamic and may change from TTI to TTI.

Table 1 lists some physical the analy downlink and uplink communication, used for HSDPA, and gives a short description for each physical channel.

Table 1
LineChannelThe channel nameDescription
Downward communication lineHS-PDSCHHigh-speed physical shared channel downlinkMoves the data sent on HS-DSCH for different UE.
Downward communication lineHS-SCCHA shared control channel for HS-DSCHMoves the alarm for HS-PDSCH.
The upward communication lineHS-DPCCHDedicated physical control channel for HS-DSCHMoves the feedback information for transmission over a downlink in HSDPA.

Figure 2 shows a timing diagram for the physical channels specified in Table 1. Timeline transmission is divided into radio frames, each radio frame has long shall be 10 milliseconds (MS). For HSDPA, each frame is divided into five subbarow, each Subcat has a duration of 2 MS and includes three intervals, and each interval has a duration 0,667 MS. TTI is equal to one Subhadra for HSDPA and is the smallest unit of time in which the UE may be assigned and handled.

Figure 2 also shows the synchronization error between the HS-SCCH, HS-PDSCH and HS-DPCCH for the UE. HS-SCCH is aligned with the edge of the frame to the radio. HS-PDSCH starts with two intervals later HS-SCCH. HS-DPCCH begins approximately 7.5 intervals from the end of the respective transmission on HS-PDSCH.

For HSDPA Node B can serve one or more UE in each TTI. The node B may send an alarm for a scheduled UE on the HS-SCCH and can send data on HS-PDSCH two intervals later. The alarm can define a scheduled UE transport format used for each scheduled UE. UE, which theoretically can receive data on the HS-PDSCH may process the HS-SCCH to determine whether they planned. Scheduled UE may additionally process the HS-PDSCH to recover the data sent to that UE. Scheduled UE may send ACK in HS-DPCCH for the correctly decoded packet or a NACK for packets decoded with an error. The package also may be referred to as a transport block, a data frame, a data block, etc. would become law is nye and unplanned UE may send CQI on the HS-DPCCH, to assist the Node B with data transmission on downlink.

For HSDPA UE can be configured either to work with the HS-SCCH, or to work without HS-SCCH. To work with the HS-SCCH signaling or the scheduling information is sent to the UE on the HS-SCCH two intervals before the packet is sent on the HS-PDSCH. The UE may monitor the HS-SCCH to determine whether sent the alarm to the UE, and may process the HS-PDSCH detection signaling on the HS-SCCH. To work without HS-SCCH signaling is not sent to the UE on the HS-SCCH before sending the packet on the HS-PDSCH. The UE may process the HS-PDSCH based on pre-configured parameters to determine whether the data sent to the UE. For HS-SCCH and without HS-SCCH signaling can be sent before re-sending the packet to the UE.

Figure 3 shows an example of transmission for downlink and uplink communication for HSDPA. UE can be configured for HS-SCCH in HSDPA and may send CQI on the HS-DPCCH in each cupcake. The UE may not know when it will be served by the Node B. Therefore, the UE may send CQI periodically in each cupcake, so that the Node B will be the most recent CQI for the UE, if and when the Node B decides to serve the UE.

If the UE is scheduled by the Node B for data transmission on the downlink in a given subcate, then the Node B may use the most recent CQI from the UE to determine the appropriate Tr is Sportage format and transmit power for data transmission to the UE. The transport format can be specified modulation scheme, the size of the transport block and many canalobre codes for use in data transmission to the UE. The node B may then send signaling (Sig) for the UE on the HS-SCCH and can send the package (Pac) data on HS-PDSCH two intervals later.

The UE may process the HS-SCCH in each cupcake to determine whether sent alarm for the UE. If the UE is scheduled in a given Subhadra, the UE may receive the transport format of the alarm and can then process the HS-PDSCH based on the transport format to restore the packet sent to the UE. The UE may then send either an ACK if the packet is decoded correctly or a NACK otherwise.

Figure 3 shows the CQI sent to each cupcake. CQI can also go on the basis of a predetermined template CQI, for example, one CQI every 5 milliseconds.

In General, the receiver may send CQI line feedback in a wireless communication system, to provide a transmitter of information to select appropriate parameters (e.g., modulation scheme, code rate, block size, etc) for data transmission on the data channel to the receiver. CQI may allow the transmitter to send data to the receiver more efficiently. Conditions in the channel may vary due to various factors, such as movements of p is redakcija and/or receiver, external interference, effects of fading and multipath propagation, etc. For good performance CQI must accurately reflect conditions in the channel at the time when the data sent by the transmitter to the receiver. Therefore, the CQI may be sent frequently to track the changing channel. However, frequent sending CQI may consume a significant amount of radioresource on line feedback. It is therefore desirable to reduce the frequency of CQI sent when possible.

In one particular message CQI may change dynamically based on the activity data in the receiver. The activity data may be determined in various ways. In one implementation, the activity data for periodic or quasi-periodic transmission may be determined based on the expected revenue packages. Some applications may send packets at regular intervals, for example every 10 MS, 20 MS, etc. are Some examples of applications that send periodic transfer, include the Protocol voice over Internet (VoIP), video telephony, covering two-way voice and video calls, and Video sharing (VShare)covering unidirectional synchronized voice and video calls. Some examples of quasi-periodic transmission (which may not be strictly periodic behavior) on the act itself footage silence descriptor (SID), sent during periods of silence, the data packets with varying time intervals due to the jamming of transmissions or retransmissions, etc. For the application that sends periodic or quasi-periodic transfer, the expected time interval between successive packets can be known and may be referred to as time Tpbetween the proceeds of the packages. Activity data can be assumed during the time between acquisitions of packages or close to it since when I made the last batch.

In another implementation, the activity data may be determined based on the state of the current packet. For example, if the packet is decoded with error and sends a NACK, it may soon be expected retransmission of the packet. On the contrary, if the packet is decoded correctly and sent the ACK, the new package may not be expected until the time of the receipt of the next packet.

In yet another implementation, the activity data may be determined based on the received signal on the data channel. For example, if a packet destined for the receiver, detected from a received signal, it may be more packages due to the pulsating nature of some applications. This version can be used for aperiodic transmission.

In any case, the message CQI may increase tsakiris, when the detectable activity data, and may decrease otherwise. For periodic or quasi-periodic transmission, such as VoIP, CQI may be sent whenever the transmitter may send the packets, and may be skipped when no packets are not expected. Message CQI can be dynamically changed in various ways, which are described below.

In one version, for periodic or quasi-periodic transmission, such as VoIP, CQI is not sent within a predetermined closed period Tgtime after successful reception of the packet. Closed period Tgtime can be chosen to be sufficiently shorter than the time Tpbetween the proceeds of the packets to at least one CQI could be sent for use by the transmitter for the next batch. Tgmay additionally be selected on the basis of the degree of scatter in the points of packets, for example a longer Tgcan be used for weak dispersion, and shorter Tgcan be used for strong scatter.

Figa shows the performance of the CQI reports from the UE, configured for HS-SCCH in HSDPA for the case in which packets are correctly decoded. For clarity, figa shows subsidry relative to the HS-PDSCH.

UE sends CQI on the HS-DPCCH in each of subbarow 0 and . The node B uses the CQI sent subcode 0, to select a transport format for the packet And sends an alarm to the UE on the HS-SCCH in subcate 1 and sends the packet And HS-PDSCH in subcate 2. UE stops sending CQI, since Subhadra 2, after receiving the alarm for the package And subcode 1. UE correctly decodes the packet and stops sending CQI during a closed period Tgtime since end of package A. In the performance shown in figa, time Tpbetween the proceeds of the packets is 20 MS, and a closed period Tgtime is 13 MS. UE sends ACK for packet And subcate 5.

Closed period Tgtime ends before Subhadra 10, and the UE sends CQI on the HS-DPCCH in each of subbarow 10 and 11. The node B uses the CQI sent subcate 10, to select a transport format for the packet and sends the packet on the HS-PDSCH in subcate 12. UE stops sending CQI in subcate 12 after receiving the alarm for a package In the HS-SCCH in subcate 11. UE correctly decodes the packet and stops sending CQI during a closed period Tgtime since the end of the batch Century UE sends ACK for packet B in subcate 15. The process can be repeated for each subsequent packet.

Figv shows the performance of the CQI reports from the UE, configured to work without HS-SCCH in HSDPA for the case in which the packets are correctly decoded. UE sends CQI on the HS-DPCCH, since Subhadra 0. The node B uses the CQI sent subcode 0, to select a transport format for the packet and sends the packet And HS-PDSCH in subcate 2. Since the Node B does not send signaling on the HS-SCCH to work without HS-SCCH, the UE may attempt to decode the HS-DPCCH in each cupcake. UE would know that he planned only after correctly decoding the packet on the HS-DPCCH. UE correctly decodes the packet and stops sending CQI during a closed period Tgtime since end of package A. the UE sends ACK for packet And subcate 5.

Closed period Tgtime ends before Subhadra 10, and the UE sends CQI on the HS-DPCCH, since Subhadra 10. The node B uses the CQI sent subcate 10, to select a transport format for the packet and sends the packet on the HS-PDSCH in subcate 12. UE correctly decodes the packet and stops sending CQI during a closed period Tgtime since the end of the batch Century UE sends ACK for the packet In subcate 15. The process can be repeated for each subsequent packet.

The performances shown in figa and 4B, sent subcatenCQI can be used for a package sent subcaten+2. Accordingly, there is a delay of approximately two Subhadra from the moment when the CQI is sent up to the moment when the CQI is used. Closed period Tgtime can be chosen from the condition that one CQI could be sent and available for use for the next expected packet. In the shown figa performance CQI may be sent in each cupcake to detect alarm for the next packet sent on the HS-PDSCH. In the shown figv performance CQI may be sent in each cupcake until the packet sent on the HS-PDSCH, is not decoded correctly. These models can provide the Node B with the most recent CQI, if the next packet is delayed, for example, is sent to subcate 13 or 14 instead of Subhadra 12.

In another execution of the CQI may be sent in a predetermined number subbarow and then stop. For example, the CQI may be sent in one cupcake at the end of the closed period Tgtime, for example in subcate 10, not in subcate 11 or 12. As another example, the CQI may be sent in two Subhadra at the end of the closed period Tgtime, for example in subcateg 10 and 11. The number subbarow to send CQI may be selected based on the degree of dispersion in time Tpbetween the proceeds of the packages. In General, continued sending CQI until you find the alarm for the next batch, can ensure that the most recent CQI is available for the next batch. However, sending CQI in Ogre is Econom number subbarow can reduce costs CQI.

Case ACK shown in figa and 4B, may occur more often and may correspond to good conditions in the channel. Thus, for the case of ACK can be used more aggressive transmission of CQI.

Figure 5 shows the performance of the CQI reports from the UE, configured to work without HS-SCCH in HSDPA for the case in which packets are decoded with an error. UE sends CQI on the HS-DPCCH, since Subhadra 0. The node B uses the CQI sent subcode 0, to select a transport format for the packet and sends the packet And HS-PDSCH in subcate 2. UE ignores the packet And, for example, has not detected the presence of the package And or was decoding the packet And error. UE continues to send CQI in each cupcake and not sends ACK or NAK in subcate 5.

The node B does not accept the expected ACK or NACK in subcate 5. The node B uses the CQI sent subcate 6, to select a transport format for the retransmission packet And subcate 8. UE receives signaling on the HS-SCCH in subcate 7 and may suspend sending CQI, since Subhadra 8.

UE again decodes the packet And error. In the first performance of the UE continues to suspend sending CQI in each cupcake until a NACK is sent, and then starts sending CQI in each cupcake until the alarm again will not be accepted by the HS-SCCH. For this purpose the UE suspends the sending CQI in each of subbarow 9 through 11, the beginning of the editing CQI in subcate 12 after sending a NACK and stop sending CQI in subcate 14 after receiving signaling on the HS-SCCH. The second version UE sends CQI in each cupcake until you are accepted alarm for HS-SCCH. For this purpose the UE would send CQI in each of subbarow from 9 to 13 and stop sending CQI, when subcate 13 is taken alarm. In any case, the UE sends a NACK for the packet And subcate 11 and sends the CQI for each of subbarow 12 and 13.

The node B uses the CQI sent subcate 12, to select a transport format for another retransmission packet And subcate 14. UE receives signaling on the HS-SCCH in subcate 13 and suspends sending CQI, since Subhadra 14. UE correctly decodes the packet and may suspend sending CQI during a closed period Tgtime since the end of the correctly decoded packet A. the UE sends ACK for packet And subcate 17 and resumes sending CQI in subcate 22 at the end of the closed period Tgtime. Tgcan be stored in the initial value (as shown in figure 5) or may be reduced on the basis of the expected time of receipt of the next packet (not shown in figure 5).

For simplicity figa, 4B and 5 show the cases in which a lump sum is transmitted and re-transmitted only one package. Many packets can be transmitted interleaved time. In this case, the message CQI may be suspended, when reset all NACK.

SL is tea NACK, shown in figure 5, may occur less frequently and may correspond to poor conditions in the channel. To better deal with bad conditions in the channel, can be used less bandwidth CQI for the case of NACK.

In other features, the frequency of CQI reports may vary based on the detected whether the activity data. The receiver may report the CQI to the first frequency, when the activity data is not detected, and may report the CQI with the second frequency greater than the first frequency when the detected activity data. Activity data can be detected on the basis of the sent on HS-SCCH signaling sent on the HS-DPCCH data and/or some other method.

In one implementation, the receiver may initially operate in the first mode, and to report CQI from the first frequency. The receiver may enter into the second mode and to report CQI with the second frequency when the receiver detects a transmission sent to the receiver. In one implementation, the receiver may remain in the second mode as long as a new transmission within a predetermined period of Tqtime from the last transmission sent to the receiver. Tqcan be selected based on various factors, such as the expected time between receipts of new packages, the desired degree of cost reduction CQI, etc. for Example, Tqmay be problem is 10 subquadrate (which equals 20 MS) or some other value. The receiver may remain in the second mode for a variable amount of time, which may depend on the degree of activity data on the receiver. The receiver may return to the first mode, if the transfer is not received by the receiver within a predetermined period of Tqtime.

Fig.6 shows the performance of the CQI reports with different frequencies depending on activity data for HSDPA. UE sends CQI on the HS-DPCCH with the first frequency (for example, every four Subhadra), since Subhadra 0. The node B uses the CQI sent subcode 0, to select a transport format for the packet and sends the packet And HS-PDSCH in subcate 2. UE detects the packet And sent to the UE, based on the signaling sent on HS-SCCH, or to work without HS-SCCH decodes the packet And without receiving any signaling on the HS-SCCH. In any case, the UE starts the CQI message with the second frequency (for example, every Subcat). The UE may maintain a timer for tracking a predetermined period of time and may reset the timer in Tqat the end of the package A. Tqset in 16 MS in the example shown in Fig.6, but can also be set to other values, for example 0, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512 or infinity. UE continues to report CQI with the second frequency, until the timer.

The node B uses the CQI sent subcate 7, for SEL the RA transport format for the packet and sends the packet on the HS-PDSCH in subcate 9. UE receives a packet In before the expiration of the timer correctly decodes the packet and resets the timer in Tqat the end of the batch Century, the UE continues to report CQI with the second frequency, until the timer. The timer expires in the course of Subhadra 18, and the UE starts the CQI message from the first frequency further from this point.

As shown in Fig.6, the UE may report the CQI often as long as people discover new transmission for the UE within the Tqthe previous submission. More frequent CQI message improves the performance of the downlink.

UE can operate in Continuous connectivity packages (CPC), which supports discontinuous transmission (DTX) and discontinuous reception (DRX). In the CPC mode UE can be assigned to the DTX pattern, which indicates open subsidry in which the UE can transmit, and closed subsidry in which the UE may not be allowed to pass. Work in DTX can reduce the amount of transmit power used by the UE, to improve battery life and reduce interference on the uplink connection.

During periods of off DTX UE may not be allowed nothing to pass upward communication. Off DTX may have an advantage over the CQI message. In this case, the CQI may be sent only if you need to send CQI on the basis of the applicable rules of CQI reports. And if the UE is in the period with DTX enabled. However, send the ka CQI only during periods with DTX enabled may not provide frequent feedback about the quality of the channel and can lead to poor performance HSDPA.

In another feature of the CQI is given a higher priority than DTX off when determining activity data, for example on the basis of any of the techniques described above. UE can operate in normal mode reports CQI, when the activity data is not defined, or in the foreground reports CQI, when the determined activity data. In normal mode reports CQI UE may send CQI, if you need to send CQI and if the UE is in the period with DTX enabled. In the foreground reports CQI UE may send CQI, if you need to send CQI, regardless of whether the UE in the period from on or off DTX.

In one execution of the UE is included in the priority mode reports CQI, when the UE detects a transmission sent to the UE. In one execution of the UE remains in the foreground reports CQI as long as a new transmission within a predetermined period of Tcqitime from the last transmission sent to the UE. Tcqican be selected based on various factors, such as the expected time between the proceeds for the new packages, the desired degree of cost reduction CQI, etc. for Example, Tcqimay be set to 10 subquadrate (which equals 20 MS) or some other value. The UE may remain in the foreground reports CQI for a variable number of the quality time which may depend on the degree of activity data for the UE. The UE may return to normal messages CQI, if the transmission is not sent to the UE within a predetermined period of Tcqitime.

Fig.7 shows the performance of the CQI reports from the UE, configured with DTX pattern having the period included DTX from one Subhadra and between DTX off of four subbarow. UE sends CQI on the HS-DPCCH with the first frequency and during periods with DTX enabled (for example, in subcate 0), operating in the normal mode CQI reports. The node B uses the CQI sent subcode 0, to select a transport format for the packet and sends the packet And HS-PDSCH in subcate 2. UE correctly decodes the packet And passes in the priority mode messages about CQI and starts the CQI message with the second frequency (for example, every Subcat) and not taking into account the periods with DTX off. The UE may maintain a timer for tracking a predetermined period of time and may reset the timer in Tcqiat the end of the package A. Tcqiset in 16 MS in the example shown in Fig.7, but can also be set to other values, as noted above for 6. UE continues to report CQI with the second frequency, not including periods with DTX disabled until the timer expires.

The node B uses the CQI sent subcate 7, to select a transport format of the La package and sends the packet on the HS-PDSCH in subcate 9. UE receives a packet In before the expiration of the timer correctly decodes the packet and resets the timer in Tcqiat the end of the batch Century, the UE continues to report CQI in the foreground reports CQI, until the timer. The timer expires in the course of Subhadra 18, and the UE starts the CQI message in normal mode reports CQI further from this point.

As shown in Fig.7, the UE may report the CQI excluding periods with DTX off for as long as people discover new transmission for the UE within the Tcqiwith the previous transmission. More frequent CQI message improves the performance of the downlink.

Fig shows the execution of a process 800 performed by a receiver, such as a UE. Activity data on the receiver can be determined, for example, on the basis of any of the techniques described above (step 812). The CQI message from the receiver can be configured based on the specific activity data (step 814). In one implementation, the activity data may be determined based on expected revenues packages for periodic or quasi-periodic transmission to the receiver. Message CQI can be resolved within a time window around each expected receipt of the package and may be suspended outside time window.

Message CQI may change based on feedback ACK/NACK, which may indicate possible future activestink. In one implementation, the message CQI may be suspended for a predetermined period of Tgtime after correctly decoding the packet, and may be renewed at the end of a predetermined period Tgtime. In one implementation, the message CQI may be suspended after the discovery of signaling to the receiver and can be renewed after sending a NACK for packet decoded with an error. Alternatively, the CQI message can be resolved after the recognition that the packet is decoded with an error, instead of waiting until a NACK is sent.

In one version CQI may be sent with the first frequency, when the activity data is not detected, and can go with the second frequency greater than the first frequency when the detected activity data. Activity data can be detected when the receiver accepts the signaling or data. The lack of activity data may be declared when no signaling or data is not received within the predetermined period Tqtime since last received signaling or data. The timer can be set in a pre-determined period of Tqthe time when a new alarm or data. The lack of activity data may be declared when the timer expires.

In one version priemnikom to work in the DTX mode, CQI may be sent only during periods with DTX enabled when the activity data is not detected, and can go as during periods included with the DTX and DTX off when it detects the activity data. CQI can also go with the first frequency and during periods with DTX enabled when the activity data is not detected, and can go with the second frequency greater than the first frequency during periods with DTX on and off when it detects the activity data.

In General, the communication of information about the state of the channel may be adjusted by the receiver based on the data activity on the receiver. Information about the state of the channel may include CQI, the display control precoded (PCI)used for pre-coding or spatial data sent from multiple antennas, information on antenna selection indicating which antenna(s) to use to send data, information about the rank that indicates the number of data streams for simultaneous sending, etc.

Fig.9 shows the execution of a process 900 performed by a transmitter, such as a Node B. CQI may be received from the receiver, and the CQI message from the receiver is configured on the basis of activity data on the receiver (step 912). Data can be sent to the receiver on the Snov, CQI, taken from the receiver (step 914).

The package can be sent to the receiver, and the ACK or NACK may be received from the receiver for the package. If ACK is received, the CQI may not be taken for a predetermined period of Tgtime after the end of the batch. If NACK is received, the CQI may be taken immediately after a NACK. CQI may be received from the receiver with the first frequency, when the activity data is not detected on the receiver or with the second frequency greater than the first frequency when the detected activity data at the receiver. The receiver can operate in DTX mode. CQI may be taken only during periods with DTX enabled when the activity data on the receiver is not detected, or during periods of both enabled and disabled DTX, when the detected activity data at the receiver.

Figure 10 shows the block diagram of the execution of the UE 120. Upward communication encoder 1012 can receive data and signaling (e.g., CQI), which UE 120 need to send in the ascending line of communication. The encoder 1012 may process (e.g., format, encode and interleave) data and signaling. Modulator 1014 (Mod) can be further processed (e.g., to modulate, to split the channels and scramble) the coded data and signaling, and to provide output elementary parcel. The transmitter 1022 (TMTR) can transform brazability (for example, convert to analog form, to filter, amplify and transform with increasing frequency) output basic assumptions and to generate a signal uplink communication, which can be transmitted via the antenna to 1024 Nodes B.

On the downlink antenna 1024 may receive signals downlink transmitted by the Node B 110, and the other Nodes B. a Receiver (RCVR) 1026 may be converted (e.g., filter, amplify, convert, with decreasing frequency, and digitize) the received signal from the antenna 1024 and provide samples. The demodulator 1016 (Demod) can handle (for example, descrambling, divided by channels and demodulate) sampling and to provide estimates of characters. The decoder 1018 may further process (e.g., to eliminate interleaving and decoding) evaluation of symbols and provide decoded data. The encoder 1012, the modulator 1014, the demodulator 1016 and decoder 1018 can be implemented using a processor 1010 modem. These units may perform processing in accordance with the radio technology (e.g., W-CDMA)used by the system.

The controller/processor 1030 may direct the operation of various modules at the UE 120. The controller/processor 1030 may implement a process 800 for pig and/or other processes for reporting CQI. Storage device 1032 may store program codes and data UE 120.

Figure 10 also shows a block diagram of the Node B 110, which may be a Node B in figure 1. At Node B 110, the transmitter/receiver 1038 may support radio communication with UE 120 and other UES. The processor/controller 1040 may perform various functions for communication with the UE. The controller/processor 1040 may also implement the process 900 figure 9 and/or other processes for receiving CQI from the UE, and send data to the UE. Storage device 1042 may store program codes and data for Node B 110.

Experts in the art would understand that information and signals may be represented using any of a number of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and basic assumptions, which can be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

Specialists additionally would recognize that various explanatory logical blocks, modules, circuits, and steps of the algorithms described in connection with the disclosure of the invention in this document, may be implemented as electronic hardware, computer software, or combinations thereof. To clearly illustrate this interdepen estimate hardware and software, various explanatory components, blocks, modules, circuits, and steps described above generally in terms of their functionality. Implemented such functionality as hardware or software depends upon the particular application and design constraints imposed on the entire system. Qualified professionals can implement the described functionality in different ways for each individual application, but such solutions should not be interpreted as causing a departure from the scope of the present disclosure.

Various explanatory logical blocks, modules, and circuits described in relation to the disclosure of the invention in this document, may be implemented or performed with a generic processor, digital signal processor (DSP), a specialized integrated circuit (ASIC), programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform as described in this document functions. The General-purpose processor may be a microprocessor, but in an alternative embodiment, the processor may be any typical p is ocessor, a controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, such as combinations of a DSP and a microprocessor, a variety of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

The stages of a method or algorithm described in connection with the disclosure of the invention in this description, can be implemented directly in hardware, in a software module executed by a processor, or in a combination of these two means. A software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, a CD-ROM or any other form of storage medium known in the art. A typical storage medium connected to the processor so that the processor can read information from and write information on the information carrier. Alternatively, the storage medium may be integral with the processor. The processor and the storage medium may reside in an ASIC. ASIC may reside in a user terminal. In an alternative embodiment, the processor and the storage medium may reside as discrete components in a user terminal.

In od the ohms or more generic versions of the described functions may be implemented in hardware, software, firmware, or any combination. 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 communications, including any medium that facilitates transfer of a computer program from one place to another. The storage media can be any available media that can be accessed through the universal or specialized computer. As an example, and not limitation, such computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical drive, the drive on magnetic disks or other magnetic storage devices, or any other medium that can be used to move or store the necessary software code in the form of commands or data structures, and to which [the media] can be accessed through the universal or specialized computer or universal or specialized processor. Any connection is properly termed a computer readable media. For example, if the software is transmitted from a website, server, or other udalennogo the source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared communication, radio frequency communication, microwave communication, coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared communication, radio frequency communication, microwave communication, included in the definition of medium. Drive when used herein, includes compact disc (CD), laser disc, optical disc, digital versatile disk (DVD), floppy disk and Blu-ray, wheredisksusually reproduce data magnetically, whiledisksreproduce data optically with lasers. Combinations of the above should also be included in the scope of computer-readable media.

The foregoing disclosure of the invention is provided to enable any person skilled in the art to make or use the invention. Various modifications to this invention will be fully apparent to experts in the field of technology and the General principles defined herein may be applied to other variations without deviating from the scope of disclosure of the invention. Therefore, this disclosure of the invention is not intended to be limited to the examples described here, the execution, and must comply with the widest scope, agree is samosa with the principles and novel traits, disclosed in this description.

1. Device for transmission of quality indicators channel containing:
at least one processor (1010) to determine the activity data to the receiver and to configure messages about the quality indicator channel from the receiver on the basis of specific activity data, and at least one processor (1010) operates in intermittent mode of transmission, sends quality indicators channel only during periods of intermittent mode enabled transmit, when the activity data is not detected, and sends indicators of the quality of the channel during periods on and off intermittent mode of the transmission when the detected activity data; and
storage device (1032), United by at least one processor (1010).

2. The device according to claim 1, in which at least one processing unit (1010) determines the activity data based on expected revenues packages for periodic or quasi-periodic transmission to the receiver sends indicators of the quality of the channel in a time window around each expected receipt of the package and suspends the transmission quality indicator channel outside the time window.

3. The device according to claim 1, in which the at least one processor (1010) suspends transmission quality indicator channel to pre-set the period of time after correctly decoding the packet and resumes the transmission quality indicator channel at the end of a predetermined period of time.

4. The device according to claim 1, in which the at least one processor (1010) suspends transmission quality indicator channel after detection alarm receiver decodes the packet with the error and allows the transmission quality indicator channel after sending a negative acknowledgment for the packet.

5. Method for transmitting quality indicators channel containing phases in which:
define (812) activity data on the receiver, and
configure (814) transmission quality indicator channel from the receiver on the basis of specific activity data, the setting of the transmission quality indicator channel includes transmission quality indicators channel only during periods of intermittent mode enabled transmit, when the activity data is not detected, and sends indicators of the quality of the channel during periods on and off intermittent mode of the transmission when the detected activity data.

6. The method according to claim 5, in which step (814) transmission quality indicator channel contains the time that
suspend the transmission quality indicator channel for a predetermined period of time after correctly decoding the packet, and
allow the transmission quality indicator channel after sending a negative acknowledgment for the packet decoded with the error./p>

7. The method according to claim 5, in which step (814) transmission quality indicator channel contains the time that
send indicators of the quality of the channel at the first frequency, when the activity data is not detected, and
send indicators of the quality of the channel at the second frequency greater than the first frequency when the detected activity data.

8. Device for transmission of quality indicators channel containing:
at least one processor (1040)
receiving indicators of the quality of the channel from the receiver, and the transmission quality indicator channel from the receiver is configured on the basis of activity data on the receiver, and
for data transmission to the receiver based on the quality indicators of the channel received by the receiver, and the receiver operates in intermittent mode of transmission and at least one processor (1040) adopts quality indicators channel only during periods of intermittent mode enabled transmit to the receiver when the activity data is not detected, and takes quality indicators channel during periods on and off intermittent mode of transmission for the receiver when it detects the activity data; and
storage device (1042), United by at least one processor.

9. The device according to claim 8, in which the at least one processor (1040) is otpravljaet packet to a receiver, takes no indicators of the quality of the channel for a predetermined period of time after service, if it be received confirmation for the package, and takes quality indicators channel after a negative acknowledgment, if it be received negative acknowledgement for a packet.

10. The device according to claim 8, in which the at least one processor (1040) adopts quality indicators at the first frequency, when the activity data on the receiver is not detected, and receives from the receiver indicators of the quality of the channel at the second frequency greater than the first frequency when the detected activity data at the receiver.

11. Method for transmitting quality indicators channel containing phases in which:
accept (912) indicators of the quality of the channel from the receiver, and the transmission from the receiver of the quality indicator channel is adjusted based on the activity data at the receiver; and
send (914) data to the receiver based on the quality indicators of the channel received by the receiver, the phase of the reception quality indicators channel from the receiver includes a reception quality indicators channel only during periods of intermittent mode enabled transmit to the receiver when the activity data on the receiver is not detected, and takes quality indicators channel during periods on and off the tunes intermittent transmission to the receiver, when the receiver detected the activity data.



 

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EFFECT: efficient assignment of resources for traffic hits.

11 cl, 10 dwg

FIELD: information technologies.

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11 cl, 10 dwg

FIELD: information technologies.

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25 cl, 9 dwg

FIELD: information technologies.

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10 cl, 5 dwg

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6 cl, 5 dwg

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20 cl, 17 dwg

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7 cl, 14 dwg

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3 cl, 6 dwg, 3 ex

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9 cl, 38 dwg

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15 cl, 12 dwg

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31 cl, 3 dwg, 4 tbl

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10 cl, 15 dwg, 1 tbl

FIELD: information technologies.

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28 cl, 8 dwg

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18 cl, 8 dwg

FIELD: information technologies.

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28 cl, 19 dwg, 11 tbl

FIELD: information technologies.

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26 cl, 9 dwg

FIELD: information technologies.

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17 cl, 7 dwg, 2 tbl

FIELD: information technologies.

SUBSTANCE: proposed invention provides for versions of methods realisation and devices for provision of system of service transfer control, associatively related to network of wireless communication. In particular, the following is provided: monitoring of one or more events of subscriber station transition within the period of time, besides, subscriber station changes between two units from multiple units associatively related to network of wireless communication, during each transition event; and formation of request for control of roaming in subscriber station in response to detection of previously detected number of transition events within the period of time, besides, request for control of roaming contains information of transition event related to one or more transition events.

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28 cl, 7 dwg

FIELD: radio communications.

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EFFECT: reduced mass and size of transceiver stations, enhanced noise immunity and electromagnetic safety of personnel.

1 cl, 7 dwg, 1 tbl

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