Distribution in control channel in wireless communication network. RU patent 2521463.

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to communication engineering. Disclosed are versions of methods and a system for distributing multiple users on a control channel of a wireless communication network. In one aspect, the method of distributing multiple users on a control channel includes selecting a first number of modulation symbols of a transition region in a control channel and allocating the first number of modulation symbols to a second number of users.

EFFECT: high transmission channel throughput.

18 cl, 6 dwg

The technical field to which the invention relates

The invention refers, in General, for communication, and more particularly, to methods and devices for efficient distribution channel management wireless communications systems.

The level of technology

Communication systems are widely deployed to provide different data services, such as speech, packet data, etc. These systems can be multiple access systems with time, frequency and/or code division multiplexing, which allow support for several users simultaneously through the sharing of available system resources. Examples of such systems multiple access include a system of multiple access with code division multiple access (CDMA), CDMA with multiple-carrier (MC-CDMA), wideband CDMA (W-CDMA)systems, high-speed packet access for downlink (HSDPA), a system of multiple access time division of channels (TDMA), multiple access system with frequency division multiple access (FDMA) and a system of multiple access with orthogonal frequency division multiple access (OFDMA).

Therefore, in the art there is a need to methods and devices for efficient distribution channel management wireless communications systems.

Summary of the invention

Open options for implementation provide the ways and distribution system to multiple users in the channel management of wireless networks.

In one aspect way communication wireless communication network contains the time that:

get the selection of a jump, and the scope of jumping allocated for multiple devices users; and

transmit control information to the character set of modulation within the scope of the leap for the control channel.

The method can optionally contain getting at least one unique code Walsh, at least one unique code Walsh is used to distinguish multiple users allocated to the area of a jump of transmitting the same characters modulation.

Furthermore, the method can optionally contain getting assign at least one symbol modulation in the character set of modulation, and the characters modulation individually assigned to one or more of the many devices users so that no two devices users were not assigned the same characters modulation.

Also how can optionally contain a link with at least one additional device or access point through OFDMA-air interface.

In another aspect, at least one processor is configured to communicate on the wireless network connection, and the processor contains:

the first module to obtain the allocation of at least one area of the jump, with an area of jumping together outstanding set of mobile devices; and

the second module data management through a set of characters modulation within the scope of the leap for the control channel.

In addition, the processor may optionally contain a module for reception of at least one Walsh code, at least one code Walsh exclusive selected individual mobile device what makes the mobile device in the set of mobile devices, communicating through the same characters modulation. Also, the processor can optionally contain a module for receiving the appointment of at least one symbol modulation from the character set of modulation, and the characters modulation are uniquely assigned to each mobile device in the set of mobile devices.

In another the aspect of the invention of the computer software product contains:

computercity the media, containing:

first code set, forcing the computer to reach the selection of a jump, with one or more user devices together highlight areas of a jump;

the second code set, forcing the computer to have at least one unique code Walsh; and

the third set of codes, forcing the computer to transmit control information to the character set of modulation within the scope of the leap for the control channel using at least one unique code Walsh, with unique Walsh codes distinguish between user devices, communicating through the same characters modulation.

Computer software product can also optionally contain four sets of code for the allocation of at least one symbol modulation from the character set of modulation, and the characters modulation assigned to one or more user devices so that no two devices users were not appointed jointly same symbol modulation.

In another aspect of the invention claimed device that contains:

the means to obtain the selection of a jump, and the scope of jumping together is allocated to a variety of mobile devices; and

tool for transferring control information to the character set of modulation inside the selection of a jump for the control channel.

In addition, the device may additionally contain a means to obtain at least one unique code Walsh, at least one unique code Walsh distinguishes each of the many mobile devices, communicating through the same characters modulation inside the selection of a jump.

Also, the device can additionally include the means to obtain the appointment of at least one symbol modulation from the character set of modulation, and the characters modulation are uniquely assigned to one or more of the many mobile devices.

Additionally, the device can have a means of communication with at least one additional device or access point through OFDMA-air interface.

In addition, another aspect of the invention way communication wireless communication network includes:

achieving the selection of a jump, however, the area of a jump rashidian allocated to multiple devices users;

getting unique selection charset modulation within the scope of the leap; and

management data to one or more characters modulation included in the set of characters modulation within the scope of the leap for the control channel.

Also declared one processor is configured for network communication wireless communication containing:

the first module to retrieve selection jump, with an area of jumping rashidian a dedicated set of mobile devices;

the second module to retrieve the selection of a set of unique characters modulation within the scope of a jump, and the set of mobile devices, rashidian selection of jumping does not share the same symbol modulation inside the selection of a jump; and

the third module data management one or more characters modulation set of dedicated unique characters modulation within the scope of the leap for the control channel.

In addition, declared computer software product that contains:

computercity the media, containing:

first code set, forcing the computer to get the selection of a jump, and the scope of jumping rashidian allocated to multiple devices users;

the second code set, forcing the computer to get a unique selection charset modulation within the scope of the leap; and

the third set of codes, forcing the computer to send data control one or more characters modulation in the set of selected characters modulation within the scope of the leap for the control channel.

Also, the declared device contains

the means to achieve the selection of a jump, and the scope of jumping rashidian a dedicated set of mobile devices;

the means to achieve the allocation charset modulation within the scope of the leap; and

tool for data management one or more characters modulation in the character set modulation within the scope of the leap for the control channel. However, the selection of characters modulation unique to one or more mobile devices in the set of mobile devices.

Besides, the method of distribution of many users on the channel management includes the selection of the first number of characters modulation region of jumping into the control channel and the appointment of a second number of users first number of characters modulation.

Brief description of drawings

Signs and essence of the invention must become more evident from the following detailed description, read together with the drawings, in which the same reference positions are defined accordingly throughout the description and on which:

figure 1 illustrates one version of the distribution in the channel of data communication network;

figa illustrates one way of implementation to assign multiple users to a single channel control in communication networks;

FIGU illustrates an alternate implementation to assign multiple users to a single channel control in communication networks;

figure 3 illustrates one version of the distribution channels control and data communication network;

figure 4 illustrates another version of the distribution channels control and data communication network; and

figure 5 shows a block diagram of the access point and access terminal.

The implementation of the invention

The word "sample" is used in this specification to mean "serves as an example, an incident or illustrations". Any option exercise or structure described in this description are "typical" and should not necessarily be interpreted as preferred or profitable in comparison with other variants of realization or structures.

"Terminal access" means a device that provides voice and/or data to the user. The access terminal can be connected to a computing device, such as a portable computer or desktop computer, or it can be a standalone device such as a personal digital device. The access terminal can also be called subscriber's device, mobile station, mobile phone, remote station, remote terminal, user terminal, the user agent or user equipment. Access terminal can be a subscriber station, wireless device, cell phone, PCS-phone, wireless phone, phone in the initiation Protocol session (SIP)station for wireless local loop (WLL), personal digital assistants (PDAs), "pocket" device supports wireless connections or other processing device connected to a wireless modem.

"Access point" means a device in the access network that communicates by radio interface by means of one or more sectors with access terminals. The access point acts as a router between the access terminal and the rest of the access network, which can include the IP network by converting the received frame of the radio interface in the IP packets. The access point also coordinates the management attributes for the radio interface.

Open options for implementation provide effective structure for the control channel in wireless systems, for example OFDMA system. The control channel simplifies the exchange of data between the terminal access (AT) and access point (AP), for example, the line feedback (RL) can be used to transfer: (a) requests for resources line (for example, REQ); (b) the indicators on the quality of the channel line (for example, CQI) and c) confirmation of receipt (for example, ACK/NACK), which provides the access point, adopted or not the terminal access data that is sent over the line, i.e. providing hybrid ARQ. Control channels, as a rule, have low speed of data transfer and useful bandwidth in comparison with data feeds.

In one embodiment, for example, on a system with a jump frequency (FH-OFDMA) channel can be specified by group of M subcarriers or colors that jump together every N characters of modulation. Thus, in the time-frequency plane area corresponds to jump rectangular lattice of N x M characters modulation. The values of M and N can be chosen so that the canal remained practically unchanged in the range of a jump, allowing channel estimation based control characters to be inserted into the scope of a jump. Channels can be specified by one or more areas of the jump, which can be assigned physical carriers rearranging the jump frequency N.

In one embodiment, the control channels can have the same structure as the data channels. However, one control channel can have the bandwidth to handle control transmission to multiple users, so that the control channel can be shared by multiple users. In one embodiment, each symbol modulation repeats P time using P-ranks overlay Walsh code (or exponential). Thus, P is different users can share a single channel, each of which sends (M*N)/P symbol modulation and each with P-ranks repetition. In this case, multiple users can be distinguished by their unique codes Walsh. The characters repeat Walsh can be placed next to each other in time and frequency so that they saw about the same distribution channel, and therefore, different users remain orthogonal. Characters modulation can be formed by a certain character conversion of governors information bits.

Figure 1 illustrates one version of the distribution channel of data communication networks, for example FH-OFDMA. Many users can be distributed in one or more data channels in your wireless network. In one embodiment, for the data channel area 102 and 104 of the jump are assigned to users U1 and U2, respectively. Users U1 and U2 can pass data by symbols modulation (sub) within their respective areas of jumping for the data channel. In one embodiment, more than one area of the jump can be assigned to a single user.

In one embodiment, users assigned to areas of a jump, may not overlap in one symbol modulation in the selection of a jump.

In the third variant of implementation can be a combination of the first and second variants of implementation described above. In the above options, the implementation of one or more control characters inserted in the control channel used for demodulation channel management, can be used in the circuit synchronization control in line feedback.

In some channels of control, for example ACK/NACK, where there can be only one bit of information, you can use the method of demodulation via dip phase-shift keying (BPSK) or amplitude shift keying (OOK). Amplitude shift keying may have advantages in case of improper distribution channel line in this NACK incorrectly assigned user does not prevent transmission of the correct owner of the channel. In the channel ACK/NACK may need a tool to reduce the likelihood of erroneous NACK for ACK, or Vice versa. ACK, mistakenly interpreted as NACK, leads to unnecessary re-transfer of the package, while NACK, mistakenly interpreted as ACK, can lead to a lack of retransmission missed packet causing the error packet. This can occur in BPSK with the help of a displaced threshold decision making, and in amplitude manipulation through appropriate threshold set of decision making. When the amplitude manipulation job absolute threshold or set a threshold on the basis of the long-term average of noise dispersion can lead to the functioning, sensitive to changes interference. According to one version of the exercise of some Walsh codes can be reserved or not be allocated to any of the users and can be used in order to obtain the variance of the noise on the field of a jump. The amplitude threshold of decision making can be set on the basis of this evaluation, the current noise dispersion. If the system is lightly loaded, all additional unused Walsh codes can be used to measure the interference. In one embodiment, AP measures the received power reserved code(s), Walsh or code(s) Walsh, not assigned to any user, and uses these beep codes to assess the current capacity of interference in line feedback. AP can use the current power interference in line feedback in order to set a threshold demodulation using amplitude manipulation to control channels, such as the control channel ACK/NAK (1-bit).

System with jump frequency can have several areas of jumping into the frame, and frames can be grouped into several panemieni frames, divided by time. Simultaneous transmission by groups subcarriers with independent jump (i.e. multiple channels of data) from one user leads to increased out-of-band radiation due to non-linearity power amplifier (PA), which would inevitably entail greater power loss PA, which cause the reduction potential of the power line. In one embodiment, a disconnected set of areas of jumping within the frame can be assigned to different channels, for example the control channels REQ/CQI and ACK/NACK, so that through these channels cannot be sent at the same time. In one embodiment, each data channel is scheduled one alternation. In one embodiment, the user switch on the control channel can be planned for alternation, non-interleave the data channel assigned to the same user.

Figure 3 illustrates one option exercise data and control information in pererezannym frames, for example, in your wireless network FH-OFDMA. The system FH-OFDMA can have several areas of jumping into the frame, and a number of specific disconnected personnel information in the channel can be grouped in the alternation of personnel. For example, figure 3 frames 1, 4 and 7 are grouped in the first alternation of frames {x1, x2, x3,...}, and frames 2, 5 and 8 are grouped into the second alternation frame {y1, y2, y3,...}.

In one embodiment, the information channel data cannot be passed through at least one frame from the first alternation of personnel, and information on the control channel can be passed through at least one frame from the second alternation of personnel. For example, figure 3, the data is transmitted via two areas 302, 304 jump in the first frame x1 and two regions 306, 308 jump in the second frame x2 belonging to the first alternation of personnel. Similarly, the control information is transmitted using two areas 312, 314 jump in the first frame y1 and two regions 316, 318 jump in the second frame y2 belonging to the second alternation of personnel. The first alternation of personnel and the second alternation of frames may have a different or the same format and/or structure.

In one embodiment, the control information of the first channel management can be passed through at least one area of a jump in the frame alternation, and control information of the second channel control can be passed through at least one excellent or disconnected areas of jumping into the same frame of alternations. For example, in figure 3 the control information of the first channel C1 control, for example ACK/NACK, passed through the area 312 jump in the first frame y1, and the control information of the second channel C2 management, for example REQ/CQI, passed through the area of 314 of jumping into the first frame of y1.

May be situations where the user needs more resources on the control channel, than is provided by means of one control channel. For example, MIMO-users may need more bits for CQI, because the channel is described by a matrix, not a scalar. Similarly, a greater number of bits may be required for the control channel ACK/NACK MIMO-user, as in the case MIMO separate ACK/NACK may be required for each level MIMO transmission. In one embodiment, several control channels, for example, in various peremerzanija can be assigned to a single user.

For example, figure 4 at least two alternation frame {y1, y2, y3,...} and {z1, z2, z3,...} the control channel is allocated to a single user, the data channel which can be allocated to alternation frame {x1, x2, x3,...}. This region 402 and 404 jump in the frame y1 and jump 412 and 414 in the frame z1 are assigned to one or more channels to a single user. As mentioned above, if several channels were assigned to a single frame, each of the channels can be assigned to different areas of the jump of the frame, for example, the field 402/412 and 404/414 the jump can carry a variety of channels management. In this example, the first channel management, for example ACK/NACK, is transferred in the areas 404 and 414 of a jump, and the second channel management, for example REQ/CQI, is transferred in the areas 402 and 412 of a jump.

In the above variants of implementation for the purpose of data and control channels unique areas of jumping into concrete frames and/or peremerzanija these temporary and/or frequency distribution can be AP/AT. In one embodiment, the AP/AT can send a separate message for distribution in the data channel and channel management, which, as a rule, increases the amount of data sent over the air interface utility signals. Alternative, distribution channel management is carried out depending on the distribution of the data channel, thereby reducing the number of messages.

In one embodiment, distribution channel management, i.e. the code of Walsh and position time-frequency lattice that the access terminal can be used to control transmission in the ascending line of communication may be implicitly in the transfer(s) on the downlink, to avoid having to send multiple messages on air. In one embodiment, distribution channel management, for example REQ/CQI is based on the MAC user ID, and the distribution of the second channel management, for example ACK/NACK based on MAC user ID and/or the channel ID of the hotline, the reception of which is confirmed.

In one embodiment, the unique identification code, for example the MAC ID is assigned to each terminal access (AT), and temporary, frequency and code providing for RL-channel management, for example REQ/CQI, may correspond to a unique identification code, for example the MAC ID. In one embodiment, the Association of the unique identification code with the corresponding provision RL-control channel is stored in the database in the form of a table, for example, AT. For example, knowing the MAC ID AT the table you can find the appropriate assigned area of a jump for the control channel REQ/CQI.

In one embodiment, the channel data, for example, the channel ID and/or information about FL-channel data sent to the AT, may correspond to specific areas of a jump on which the transfer can be done in RL-channel management. For example, message distribution channel data line can correspond to specific areas of a jump assigned to a control channel, for example ACK/NACK in a table stored in a database AT.

Open options for implementation may be applied to any technology or combination of the following technologies: systems multiple access code division multiple access (CDMA), CDMA with multiple-carrier (MC-CDMA), wideband CDMA (W-CDMA)systems, high-speed packet access for downlink (HSDPA), a system of multiple access time division of channels (TDMA), multiple access system with frequency division multiple access (FDMA) and a system of multiple access with orthogonal frequency division multiple access (OFDMA).

Figure 5 shows a block diagram of the point 110x access and terminal 120x access for the implementation of the expanded options for implementing described above in connection with figure 1-4. In line feedback, in the terminal 120x, processor 514 data transmission (TX) receives traffic data from the buffer 512 data, processes (for example, codes, punctuates and performs character conversion) every packet of data based on the selected encoding and modulation and provides data characters. "Character data" is a symbol modulation for data "check digit" - a symbol modulation for control signal (which is known in advance). Modulator 516 accepts data characters, control characters, and perhaps utility signals for line feedback, performs (OFDM) modulation and/or other processing, specified by the system, and provides an output stream elementary signals. The sending device (TMTR) 518 processes (for example, converts in analog form, filters, strengthens and converts with increasing frequency) stream output elementary signals and generates a modulated signal which is transmitted from an antenna 520.

In the access point (AP) 110x modulated signals transmitted through terminal 120x and other systems that communicate with the point 110x access, accepted by the antenna 552. The receiving device (RCVR) 554 processes (for example, leads to the required parameters and digitizes) received signal from the antenna 552 and provides accept the selection. Demodulator (Demod) 556 processes (for example, demodulates and finds) take samples and provides discovered data characters that are noise rating symbols of data transferred via terminals in AP 110x. Processor 558 data reception (RX) processes (for example, reverse character translate, reverse alternation and decoding) found the characters of data for each terminal, and provides the decoded data for this terminal.

In line in AP 110x traffic data processed by the processor 560 TX-data to form the characters of data. Modulator 562 accepts data characters, control characters and service signals for line executes (OFDM) modulation and other relevant processing and provides an output stream elementary signals, which additionally converted to the appropriate settings by sending device 564 and passed from antenna 552. Official signals of the hotline can include commands to control the power generated by the controller 570 for all terminals that transfer line feedback AP 110x. In the terminal 120x modulated signal transmitted by the AP 110x, is received by the antenna 520 is given to the appropriate settings and is digitized by the receiving device 522 and processed by demodulator 524 to get discovered data characters. Processor 526 RX-data processes the detected data characters and provides the decoded data to the terminal and service signal line. The controller 530 accepts commands to control power and manages communications and power transmission lines feedback AP 110x. Controllers and 570 530 controlling terminal 120x and point 110x access respectively. Storage device 532 and 572 save the code and data used by controllers and 570 530 respectively, for the implementation of the open methods of distribution channels management.

Described in this document the methodology of signal transmission can be implemented by different means. For example, these techniques can be implemented in hardware, software, or both. When implemented in hardware processing units, used to handle (to example, to compress and encode) signals that can be implemented in one or more specific integrated circuits (ASIC), the digital signal processors (DSP), devices of digital processing of signals (DSPD), programmable logic devices (PLD), user-programmable matrix BIS (FPGA), processors, controllers, microcontrollers, microprocessors and other electronic devices designed to perform described in this document options, or a combination of both. Processing units, used to decrypt and decompress the signals can also be implemented in one or more ASIC, DSP, etc.

When implemented in software, methods of signal transmission can be implemented using modules (for example, procedures, functions, and so on)that do described in this document function. Program codes can be stored in a storage device (for example, in a storage device 532 or 572 figure 5) and executed by the CPU (for example, a controller and 570 530). The storage device can be implemented in the processor or external to the processor.

1. The method of communication in a wireless network that contains the time that: get the selection of a jump, and the scope of jumping allocated for multiple devices users; and transmit control information in the character set modulation within the scope of the leap for the control channel.

2. The method according to claim 1, additionally contains receiving at least one unique code Walsh, at least one unique code Walsh is used to distinguish multiple devices of users allocated to the area of a jump of transmitting the same characters modulation.

3. The method according to claim 1, additionally contains obtaining the appointment of at least one symbol modulation in the character set of modulation, and the characters modulation individually assigned to one or more of the many devices users so that no two devices users were not assigned the same characters modulation.

4. The method according to claim 1, additionally contains a relationship with at least one additional device or access point through OFDMA-air interface.

5. The processor is configured to communicate on the wireless network connection, contains: the first module to obtain the allocation of at least one area of the jump, with an area of jumping together outstanding set of mobile devices; and the second module data management through a set of characters modulation within the scope of the leap for the control channel.

6. The processor according to claim 5, additionally contains the module for reception of at least one Walsh code, at least one code Walsh exclusive selected individual mobile device what makes the mobile device in the set of mobile devices, communicating through the same characters modulation.

7. The processor according to claim 5, additionally contains the module to get the appointment of at least one symbol modulation from the character set of modulation, and the characters modulation are uniquely assigned to each mobile device in the set of mobile devices.

8. Computercity the media containing: the first code set, forcing the computer to get the selection of a jump, with one or more user devices together highlight areas of a jump; the second code set, forcing the computer to have at least one unique code Walsh; and the third set of codes, forcing the computer to transmit control information in the character set modulation within the scope of the leap for the control channel using at least one unique code Walsh, with unique Walsh codes distinguish between user devices, communicating through the same characters modulation.

9. Computercity medium of claim 8, further contains four sets of code for the allocation of at least one symbol modulation from the character set of modulation, and the characters modulation assigned to one or more devices users so that no two devices users are not used in conjunction same symbol modulation.

10. Communication device in your wireless network, containing: a tool for obtaining the selection of a jump, and the scope of jumping together is allocated to a variety of mobile devices; and a means for transmitting control data in a character set modulation inside the selection of a jump for the control channel.

11. The device according to claim 10, additionally contains a tool for getting at least one unique code Walsh, at least one unique code Walsh distinguishes each of the many mobile devices, communicating through the same characters modulation inside the selection of a jump.

12. The device according to claim 10, additionally contains a tool for obtaining the appointment of at least one symbol modulation from the character set of modulation, and the characters modulation are uniquely assigned to one or more of the many mobile devices.

13. The device according to claim 10, additionally contains a tool for communication with at least one additional device or access point through OFDMA-air interface.

14. The method of communication in a wireless network, containing: obtaining the selection of a jump, and the scope of jumping rashidian allocated to multiple devices users; obtaining unique selection charset modulation within the scope of the leap; and data management one or more characters modulation included in the set of characters modulation within the scope of the leap for the control channel.

16. Computercity the media, containing: the first code set, forcing the computer to get the selection of a jump, and the scope of jumping rashidian allocated to multiple devices of the users; the second code set, forcing the computer to get a unique selection charset modulation within the scope of the leap; and the third set of codes, forcing the computer to transmit data management in one or more characters modulation in the set of selected characters modulation within the scope of the leap for the control channel.

17. Communication device in your wireless network, containing a means for obtaining a selection of a jump, and the scope of jumping rashidian a dedicated set of mobile devices; the tool to retrieve the selection of a set of characters modulation within the scope of the leap; and a means for data management in one or more characters modulation in the character set modulation within the scope of the leap for the control channel.

18. Device 17, in which the allocation of symbols modulation unique to one or more mobile devices in the set of mobile devices.