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WO2008031360A1 - Procédé, système et dispositif de transmission dans un système de relais sans fil - Google Patents

Procédé, système et dispositif de transmission dans un système de relais sans fil Download PDF

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Publication number
WO2008031360A1
WO2008031360A1 PCT/CN2007/070659 CN2007070659W WO2008031360A1 WO 2008031360 A1 WO2008031360 A1 WO 2008031360A1 CN 2007070659 W CN2007070659 W CN 2007070659W WO 2008031360 A1 WO2008031360 A1 WO 2008031360A1
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WIPO (PCT)
Prior art keywords
control
data
information
signal
node
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2007/070659
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English (en)
Chinese (zh)
Inventor
Zheng Shang
Aimin Zhang
Yuanyuan Wang
Jiang Li
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
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Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of WO2008031360A1 publication Critical patent/WO2008031360A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/08—Load balancing or load distribution
    • H04W28/086—Load balancing or load distribution among access entities
    • H04W28/0861—Load balancing or load distribution among access entities between base stations
    • H04W28/0862—Load balancing or load distribution among access entities between base stations of same hierarchy level
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/026—Co-operative diversity, e.g. using fixed or mobile stations as relays
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2603—Arrangements for wireless physical layer control
    • H04B7/2606—Arrangements for base station coverage control, e.g. by using relays in tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user

Definitions

  • BWA Broadband Wireless Access
  • Another embodiment of the present invention further provides a transmission method in a wireless relay system, which can effectively adjust the load balance of the RS to avoid overloading a single RS.
  • the source node encodes and modulates the information of the service flow to be sent to generate a transmission signal, and sends the signal;
  • the target node receives a signal that is simultaneously forwarded from multiple RSs, and the signal is a superposition of a plurality of RS forwarding signals, estimates a channel coefficient, and demodulates and decodes the received signal to obtain the transmitted information.
  • the data between the source node and the target node is jointly forwarded by the plurality of relay nodes RS, and the method includes the following steps:
  • the plurality of RSs participating in the forwarding are used for demodulating and decoding the signal sent by the source node, and then re-encoding and modulating, and then forwarding the coded modulated signal to the target node according to the indication information of the control node;
  • the uplink data processing module is configured to, under the control of the control module, code-modulate the data to be transmitted, and encode the modulated data and the generated report information in a time-frequency resource allocated to the to-be-sent data.
  • the location is sent out through the transmitter.
  • FIG. 3 is a flowchart of an embodiment of a method for transmitting a signal by a source node and a signal received by a target node when a direct connection of a source node to a target node is included in the transmission method in the first wireless relay system of the present invention.
  • the BS or the RS report with control capability requires entry or exit of the RS active set.
  • the present embodiment does not include the case where the source node directly transmits a signal to the target node.
  • the process includes the following steps:
  • the indication information of the control node refers to: directly transmitting, by the BS or the RS with control capability, a control message containing the indication information or a control message containing the indication information by the BS forwarded by the other RS or the control-capable RS Level-relay RS, the indication information contains time-frequency resource information used by the current service flow.
  • the RS in the RS active set receives the signal from the source node and demodulates the decoding.
  • ⁇ 5 is the data generated by the data X BS in the same code modulation mode as the RS.
  • the MS receives data forwarded from the BS and multiple RSs simultaneously in the downlink terminal subframe, and estimates an equivalent composite channel coefficient, which is demodulated and decoded.
  • the transmission ends. If the data transmission error occurs, the corresponding retransmission mechanism needs to be used for retransmission.
  • Step 401 The source node encodes and modulates the to-be-transmitted information to form a transmission signal ⁇ , and sends it out.
  • Step 403 the RS determines whether it needs to forward, and the condition of the RSi forwarding signal is: (RSi correctly receives the signal from the source node) and ((the channel quality between the RSi and the target node meets a predetermined value) or (the control node specifies the RSi) Forward)), if the RSi does not need to be forwarded, discard the signal and end the process. If forwarding is required, go to step 404.
  • Steps 405-406 the target node receives signals simultaneously sent from multiple RSs, and determines whether there is direct data transmission from the source node to the target node. If there is and ⁇ is equal to X m , that is, the RS and the source node adopt the same code modulation mode. Step 407 is performed; if the X ss is not equal to, that is, the RS uses a different coding modulation mode from the source node, step 408 is performed; if there is no direct data transmission from the source node to the target node, the target node estimates an equivalent synthesis. The channel is demodulated and decoded for ! ⁇ and then ends.
  • the transmission ends. If the signal transmission is incorrect, the corresponding retransmission mechanism needs to be used for retransmission.
  • the PMPP transmission method is described in detail:
  • the code modulation mode may adopt a different coding modulation mode than the MS, or may use the same code modulation mode as the MS, and then form the data to be transmitted X ss , RSi to
  • the channel coefficient of the BS is a vector in which ⁇ and ⁇ 5 have the same dimension, there is direct data transmission from the MS to the BS, and the pre-equalization technique is enabled:
  • MS X MS transmits a data frame in the uplink sub-terminal, wherein the frequency resources used by the specified BS.
  • the RS in the RS active set receives the data X MS from the MS in the uplink terminal subframe, and demodulates and decodes, and the BS also receives the data in the uplink terminal subframe, and sets the data received by the BS as 3)
  • the time-frequency resource used is used by The BS specifies that the RS that does not participate in the relay forwarding discards the demodulated and decoded data, and ends the process.
  • the composite signal that the BS receives multiple RSs simultaneously forwarded in the uplink relay subframe is processed separately according to the following conditions:
  • the BS estimates the equivalent composite channel and demodulates and decodes F.
  • the BS estimates the equivalent composite channel, performs demodulation and decoding, and checks the CRC to determine whether it is correct. If it is correct, it ends. If it is incorrect, it enters 4.2).
  • the BS demodulates and decodes the MS .
  • X ss in the equation is the data generated by the source node after coding and modulating the transmitted signal by using the same coding modulation method as the relay RS participating in the forwarding, so it is the same as the RS code modulated data participating in the forwarding, and when the pre-enablement is enabled
  • the other processing flow is the same as the third embodiment.
  • the MS does not receive the data directly sent by the source node, and the processing method applies the policy 4, that is, the same as the case where there is no direct transmission from the source node to the target node, and the method flow is the same as that in the first embodiment.
  • RS1/RS2 receives the signal X BS1 /X BS2 transmitted by the BS in the downlink relay subframe, and demodulates and decodes.
  • RSi judges whether it needs to forward the signal according to the CID table it manages.
  • the frame header of the received data contains CID information. If the RSI does not need to be forwarded, the signal is discarded, and the process ends. If forwarding is required, enter 4).
  • an MS has two upstream traffic streams at the same time, such as video and voice.
  • Two different traffic flows correspond to two different CIDs, and the BS is connected to the MS through two different RSs.
  • the connection identifier is CID1
  • the signal sent by the MS is X MS1
  • the connection identifier is CID2
  • the signal sent by the MS is X MS2 .
  • the BS tells each RS through the control message that the CID of the service flow needs to be forwarded, so that each RS knows which CID data it needs to forward.
  • RS1 is responsible for forwarding data of CID1
  • RS2 is responsible for forwarding data of CID2.
  • multiple RSs can forward data of CID1, and multiple RSs forward CID2. The data.
  • RSi re-encodes the demodulated and decoded bit stream according to the indication of the BS, and obtains a signal to form a transmission signal.
  • ⁇ X S is transmitted in an uplink relay subframe, wherein the used time-frequency resource is specified by the BS.
  • the transmission ends. If the signal transmission is incorrect, the corresponding retransmission mechanism needs to be used for retransmission.
  • the second method of transmitting the data in the present invention that is, the case where the data between the source node and the target node is forwarded by different relay RSs at different time-frequency resources is described in detail. If there is a direct connection from the source node to the target node, while the RS transmits the signal to the target node, the source node may send other different signals to the target node on different time-frequency resources, or may not send signals to the target node.
  • each RS forms a different signal to be forwarded X ss, wherein the signal to be forwarded is different, which may be caused by different coding modulation modes, or may be source signal bits. Due to the difference in flow, since the signals to be forwarded are different, each RS needs to use different time-frequency resources to forward these signals.
  • Let RSi be the target node's channel coefficient h, where h t and X RS i have the same dimension vector.
  • the resource sends a signal to the target node, and the signal may be the same data as the RS, and is transmitted on the same time-frequency resource in the same code modulation mode as the RS; or the source node and all the RS intercepts each other. Different data, which do not overlap, do not miss, are sent on different time-frequency resources, and may not send signals to the target node; if the source node is a control node, the above-mentioned transmission mode is determined by itself.
  • the indication information of the control node refers to that the BS or the RS with control capability directly sends a control message containing the indication information or a control message containing the indication information of the BS or the control-capable RS forwarded by other RSs to the current level.
  • a relay RS where the indication information includes time-frequency resource information used by each segment of the data stream and a segmentation feature of the data interception; the RS participating in the relay forwarding intercepts the bit stream according to the segmentation feature in the indication information and marks the sequence number Then, according to the time-frequency resource information used by each segment in the indication information, the intercepted bit stream is code-modulated and transmitted on the corresponding time-frequency resource.
  • Step 505 The target node receives signals from multiple RSs or including the source node simultaneously transmitting on different time-frequency resources, and estimates respective equivalent channel coefficients, and then from different RSs.
  • the signals are demodulated and decoded according to the indication information of the control node, and finally spliced into a bit stream transmitted by the source node to itself.
  • the indication information of the control node refers to that the BS or the RS with control capability directly sends a control message containing the indication information or a control message containing the indication information of the BS or the control-capable RS forwarded by other RSs to the current level.
  • the indication information includes time-frequency resource information used by each segment of the data stream and a segmentation feature of the data; the target node separately demodulates and decodes the bit stream of the specific data forwarded by each received RS, and then according to the indication Segmentation features in the information splicing them.
  • the receiver is configured to receive data sent by the source node through the antenna of the duplexer, and convert the data from the radio frequency signal to the baseband signal.
  • a downlink data processing module configured to process downlink data received by the receiver, demodulate and decode the received data, extract a control command of the control node, send the control command to the control module, and then send the control command to the control module.
  • the demodulated and decoded data is coded and modulated according to the indication information of the control command, and then transmitted at a specified time-frequency resource position, or the demodulated and decoded data is intercepted and coded and modulated at a specified time-frequency resource position. Send, or splicing the demodulated decoded data.
  • the downlink data processing module determines the data of the feature according to the indication information.
  • the segmentation feature indicated intercepts the data, and then encodes and modulates the intercepted data, and then transmits the indication signal through the transmitter.
  • the data is sent out at the time-frequency resource location in the message.
  • the data processing module splices the pieces of data received at the corresponding time-frequency resource locations according to the segmentation feature, and then performs code modulation, and transmits the data to the time-frequency resource location indicated by the control node by the transmitter.
  • An uplink data processing module configured to process uplink data received by the receiver, and after demodulating and decoding the received data, according to a control command of the control node extracted from the downlink data processing module, under the control of the control module, Demodulating and decoding the data according to the instruction information of the control command, and then transmitting the data through the transmitter at a specified time-frequency resource location, or intercepting and decoding the demodulated data, and then transmitting the modulated time-frequency through the transmitter.
  • the uplink data processing module encodes and modulates the data of the feature identifier, and is indicated by the transmitter in the indication information.
  • the data is sent out at the location of the time-frequency resource.
  • the uplink data processing module and the downlink data processing module share the transmitter and the receiver in a time sharing manner.
  • the transmitter is configured to receive data of the uplink data processing module and the downlink data processing module, convert the data from the baseband signal to the radio frequency signal, and send the data to the target node through the antenna of the duplexer.
  • the uplink data processing module of the RS specifically includes: an uplink demodulation and decoding unit, an uplink data buffer unit, and an uplink. a channel measurement unit, a feedback information generation unit, a feedback information extraction unit, an uplink coding modulation unit, and a multiplexer; the downlink data processing module of the RS specifically includes: a downlink demodulation decoding unit, a downlink data buffer unit, a control command extraction unit, and a downlink channel.
  • the measurement unit, the downlink code modulation unit, and the multiplexer; the control module of the RS specifically includes: an analysis unit, a control command generation unit, and a control unit.
  • the control unit in the control module is respectively connected with each of the modules in the uplink data processing module and the control data line of the downlink data processing module, for the other modules in the figure.
  • the control signal lines connected to the respective modules in the uplink data processing module and the downlink data processing module by the control unit are uniformly represented by two thick arrows.
  • An uplink channel measuring unit configured to measure, according to an output of the receiver and an output of the uplink demodulation and decoding unit, a quality of the received uplink signal, and send the measured quality information to the control module, and the control module is configured according to the control module
  • the received quality information is used to determine whether the report needs to be reported. If the report needs to be reported, the control module outputs the quality information that needs to be reported to the feedback signal generating unit. If the report does not need to be reported, the control module discards the quality information that is not required to be reported.
  • a feedback signal generating unit configured to generate, by the control module, quality information outputted by the uplink channel measurement unit, generate report information, and determine, by the control module, the report
  • the load condition of the RS generates report information.
  • the feedback information extracting unit is configured to extract feedback information from the data output by the uplink demodulation decoding unit, and send the extracted feedback information to the control module.
  • the multiplexer is configured to multiplex the report information generated by the feedback information generating unit and the uplink forwarding data generated by the uplink code modulation unit, and send the signal to the transmitter.
  • a downlink demodulation decoding unit configured to demodulate, de-symbol map, deinterleave and channel decode the downlink baseband signal received by the receiver under control of the control module to obtain uncoded original information data, and obtain the obtained Raw information data output.
  • control command extracting unit configured to extract, in the original information data processed by the downlink demodulation decoding unit, a control command sent by the control node, and send the control command to the control module, A corresponding control message containing the indication information is generated by the control module.
  • a downlink data buffer unit configured to buffer original information data output by the downlink demodulation decoding unit, and output the entire data to the downlink code modulation unit according to the control command under the control of the control module, or intercept a certain output of the data according to the control command
  • the downlink code modulation unit is sent, or the stored pieces of data are spliced according to the control command and output to the downlink code modulation unit.
  • a downlink channel measurement unit configured to measure, according to an output of the receiver and an output of the downlink demodulation and decoding unit, a quality of the received downlink signal under the control of the control module, and send the measured quality information to the control module, where the control module is The received quality information is judged whether it needs to be reported. If the report needs to be reported, the control module sends the quality information that needs to be reported to the feedback information generating unit in the uplink data processing module, and the feedback information unit generates the report information and sends the report information to the uplink data processing module. In the multiplexer, the multiplexer multiplexes the reported information with the uplink data and sends it to the transmitter.
  • the downlink code modulation unit is configured to perform channel coding, interleaving, symbol mapping, and modulation on the original information data output by the downlink data buffer unit under the control of the control module.
  • a multiplexer configured to multiplex the control message generated by the control module with the downlink forwarding data generated by the downlink code modulation unit, and send the signal to the transmitter.
  • the analyzing unit is configured to receive a control command sent by the control command extracting unit in the downlink data processing module, parse the received command, send the parsed control command to the control unit, and receive the feedback information in the uplink data processing module. Extracting the feedback information sent by the unit, parsing the received information, and transmitting the parsed feedback information to the control unit.
  • control unit configured to complete control of the transmitter, the receiver, the uplink data processing module, and the downlink data processing module, including: receiving a control command sent by the analyzing unit, and controlling the downlink data buffer unit and the uplink data buffer unit according to the control command Data directly Output, segmentation, output, or splicing output processing; receiving quality information sent by the uplink channel measurement unit or the downlink channel measurement unit, and determining whether the report needs to be reported according to the received quality information, and if the report needs to be reported, the quality to be reported.
  • the information is output to the feedback information generating unit, and the control feedback information generating unit generates the report information, and sends the report information to the multiplexer in the uplink data processing module, and the multiplexer generates the uplink information and the uplink code modulation unit generated by the feedback information generating unit.
  • a control command generating unit for a control capable RS, the control command generating unit is configured to generate, under the control of the control unit, a control message containing the instruction information for controlling the lower node, and send it to the multiplexer, which is to be
  • the control command generated by the control command generating unit is multiplexed with the downlink forwarding data generated by the downlink code modulation unit, and is sent out; for the RS without control capability, the control command generating unit is configured to forward the control of the superior RS or BS.
  • the command is sent to the multiplexer, and the multiplexer will control the command generation unit.
  • the internal structure of the BS can be as shown in FIG. 8. Referring to FIG. 8, the BS includes: a transmitter, a receiver, and a duplexer. And an antenna, an uplink data processing module, a downlink data processing module, and a control module.
  • the duplexer is connected to the antenna and is used for time-sharing transmission and reception of the antenna.
  • An uplink data processing module configured to receive, by the receiver, data sent by the MS to the BS, and under the control of the control module, demodulate and decode the received data, perform demodulation, decoding, and splicing, and obtain the transmitted data, and simultaneously Extracting the feedback information from the demodulated and decoded data, Send to the control module.
  • control module configured to complete control of the transmitter, the receiver, the uplink data processing module, and the downlink data processing module, and generate a control message including the indication information according to the feedback information received from the uplink data processing module, and send the control message to the downlink data processing Module.
  • a downlink data processing module configured to perform code modulation on the data to be sent under the control of the control module, and pass the coded modulated data and the control message sent by the control module to the time-frequency resource location allocated to the data to be transmitted.
  • the transmitter sends it out.
  • the uplink data processing module of the BS specifically includes: an uplink demodulation and decoding unit, an uplink data buffer unit, an uplink channel measurement unit, and a feedback information extraction unit.
  • the downlink data processing module of the BS specifically includes: a downlink data cache.
  • the control module of the BS specifically includes: an analysis unit, a control unit, and a control command generation unit.
  • the control unit in the control module is connected to each of the uplink data processing module and each module in the downlink data processing module, except that it is not connected to the downlink data buffer unit.
  • the uplink data buffer unit is configured to buffer the original information data output by the uplink demodulation decoding unit, and directly output the data under the control of the control module, or combine the data and output.
  • Uplink channel measurement unit for controlling the output of the receiver under the control of the control module And outputting the uplink demodulation and decoding unit to measure the quality of the received uplink signal, and transmitting the measured quality information to the control module.
  • a downlink data buffer unit configured to cache original information data to be sent.
  • the downlink code modulation unit is configured to perform channel coding, interleaving, symbol mapping, and modulation on the original information data in the downlink data buffer unit under the control of the control module.
  • the multiplexer is configured to multiplex the control message generated by the control module and the downlink transmission data generated by the downlink coding unit to the transmitter under the control of the control module.
  • the analyzing unit is configured to receive the feedback information sent by the feedback information extracting unit in the uplink data processing module, parse the received information, and send the parsed feedback information to the control unit.
  • control unit configured to complete control of the transmitter, the receiver, the uplink data processing module, and the downlink data processing module, including: receiving feedback information sent by the analysis unit, and receiving quality information sent by the uplink channel measurement unit, according to the feedback
  • the information and quality information control control command generating unit generates a control message containing the instruction information for controlling the lower node.
  • the MS includes: a transmitter, a receiver, a duplexer and an antenna, an uplink data processing module, a downlink data processing module, and a control module.
  • the receiver is configured to receive data sent by the source node through the antenna of the duplexer, and convert the data from the radio frequency signal to the baseband signal.
  • a downlink data processing module configured to receive, by the receiver, data sent by the BS to the MS, Under the control of the control module, the received data is demodulated and decoded, demodulated and decoded, and spliced to obtain the transmitted data, and at the same time, the control command is extracted from the demodulated and decoded data, and sent to the control module, and The quality of the received downlink signal is measured according to the output of the receiver and the output of the downlink demodulation decoding unit, and the measured quality information is sent to the control module.
  • control module configured to complete control of the transmitter, the receiver, the uplink data processing module, and the downlink data processing module, and control the downlink data processing module to demodulate and decode the data according to the control command sent by the received downlink data processing module, Or demodulating and decoding, performing splicing; receiving quality information sent by the downlink data processing module, and controlling the uplink data processing module to generate reporting information.
  • An uplink data processing module configured to perform code modulation on the data to be transmitted under control of the control module, and transmit the coded modulated data and the generated report information to the time-frequency resource location allocated to the data to be transmitted through the transmitter Send it out.
  • the uplink data processing module and the downlink data processing module share the transmitter and the receiver in a time sharing manner.
  • the transmitter is configured to receive data of the uplink data processing module and the downlink data processing module, convert the data from the baseband signal to the radio frequency signal, and send the data to the target node through the antenna of the duplexer.
  • the downlink data processing module of the MS specifically includes: a downlink demodulation and decoding unit, a downlink data buffer unit, a control command extraction unit, and a downlink channel measurement unit.
  • the uplink data processing module of the MS specifically includes: an uplink data cache.
  • the control module of the MS specifically includes: an analyzing unit and a control unit.
  • the control unit in the control module is respectively connected with each of the modules in the uplink data processing module and the control data line of the downlink data processing module, for the other modules in the figure.
  • the signal flow relationship between the control unit and the uplink data processing module and the downlink data processing module are clear.
  • the control signal lines connected to each module are represented by two thick arrows.
  • the downlink demodulation and decoding unit is configured to perform demodulation, de-symbol mapping, de-interleaving and channel decoding on the baseband signal sent by the BS received by the receiver to the MS under the control of the control module to obtain uncoded original information data. And output the raw information obtained.
  • the downlink data buffer unit is configured to buffer the original information data output by the downlink demodulation decoding unit, and directly output the data under the control of the control module, or combine the data and output.
  • a control command extracting unit configured to extract a control command from the data obtained by the downlink demodulation decoding unit, and send the control command to the control module.
  • An uplink data buffer unit configured to cache original information data to be sent.
  • the uplink coding and modulation unit is configured to perform channel coding, interleaving, symbol mapping, and modulation on the original information data in the uplink data buffer unit under the control of the control module.
  • the feedback information generating unit is configured to generate, by the control module, the report information that is sent by the control module and needs to be reported.
  • the analyzing unit is configured to receive a control command sent by the control command extracting unit in the downlink data processing module, parse the received command, and send the parsed control command to the control unit.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé de transmission d'informations dans un système de relais sans fil, ledit procédé comprenant une étape dans laquelle les informations envoyées entre le noeud source et le noeud cible sont relayées par plusieurs RS. Les RS peuvent envoyer des informations dans le même domaine temps-fréquence ou dans un domaine temps-fréquence différent. Le noeud cible décode les informations en provenance des RS simultanément lorsque les informations sont dans le même domaine temps-fréquence. Le noeud cible décode ensuite les informations respectivement du domaine temps-fréquence différent, et connecte chaque information décodée afin d'obtenir le résultat. L'invention concerne également un système de transmission d'informations dans le système de relais sans fil. Le procédé et le système de l'invention permettent d'améliorer la fiabilité de transmission de liaison, d'équilibrer une charge entre des RS, et d'améliorer la QS du noeud cible.
PCT/CN2007/070659 2006-09-07 2007-09-07 Procédé, système et dispositif de transmission dans un système de relais sans fil Ceased WO2008031360A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2006101268658A CN101141172B (zh) 2006-09-07 2006-09-07 无线中继系统中的传输方法及传输系统
CN200610126865.8 2006-09-07

Publications (1)

Publication Number Publication Date
WO2008031360A1 true WO2008031360A1 (fr) 2008-03-20

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