WO2011038648A1 - 一种透明中继网络中的上行混合自动重传请求方法及装置 - Google Patents

一种透明中继网络中的上行混合自动重传请求方法及装置 Download PDF

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Publication number
WO2011038648A1
WO2011038648A1 PCT/CN2010/077132 CN2010077132W WO2011038648A1 WO 2011038648 A1 WO2011038648 A1 WO 2011038648A1 CN 2010077132 W CN2010077132 W CN 2010077132W WO 2011038648 A1 WO2011038648 A1 WO 2011038648A1
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WO
WIPO (PCT)
Prior art keywords
base station
uplink data
mobile terminal
relay station
uplink
Prior art date
Application number
PCT/CN2010/077132
Other languages
English (en)
French (fr)
Inventor
钱莉
Original Assignee
华为技术有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to BR112012007148A priority Critical patent/BR112012007148A2/pt
Priority to EP10819877A priority patent/EP2442474A4/en
Publication of WO2011038648A1 publication Critical patent/WO2011038648A1/zh
Priority to US13/430,848 priority patent/US20120182878A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1887—Scheduling and prioritising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1835—Buffer management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link
    • H04L2001/0097—Relays
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to an uplink hybrid automatic repeat request method and apparatus in a transparent relay network.
  • wireless relay The basic idea of wireless relay is to use the relay station to reprocess the signal of the base station and then send it out. Due to its low implementation cost, relay stations are widely deployed by operators to improve the communication experience of cell edge users and expand cell coverage. As a hotspot technology of B3G/4G, wireless relay is mainly used to expand the coverage of the cell and improve the throughput of the system.
  • the transparent relay mode means that in the cell, the mobile terminal cannot perceive the existence of the relay station.
  • the type II relay method currently under discussion in the LTE-A standard in the 3GPP standards organization is a transparent relay mode, because in the relay system, the mobile terminal does not know the existence of the relay station, so that the transparent relay system It can better achieve backward compatibility with existing LTE Rel-8 terminals.
  • Hybrid Automatic Repeat ReQuest is one of the channel adaptation methods adopted by the LTE standard at the physical layer. That is, the transmitting end continuously transmits (retransmits) data to the receiving end in a certain code modulation mode until The receiving end successfully decodes and feeds back the acknowledgement message (ACK).
  • HQQ Hybrid Automatic Repeat ReQuest
  • the transparent relay method discussed in the current standard is implemented by the HARQ process of the physical layer. The process is as follows:
  • the relay station listens (ie receives on a specific channel) the data transmitted by the mobile terminal (or base station) and successfully decodes;
  • the relay station participates in the retransmission process and sends retransmission data to the base station (or mobile terminal).
  • the mobile terminal sends uplink data to the base station, and the relay station listens and decodes the data;
  • the base station sends a response message (ACK/NACK) to the mobile terminal, and feeds back the decoding situation of the base station;
  • the relay station sends a response message to the base station, and feeds back the decoding situation of the relay station;
  • the uplink retransmission operation is performed; at the same time, if the relay station has successfully decoded, it also participates in the uplink retransmission process.
  • the inventors have found that at least the following problems exist in the prior art: as long as the base station does not successfully receive the uplink data of the mobile terminal, even if the relay station has successfully received, the mobile terminal still receives the NACK information fed back by the base station. Therefore, the mobile terminal must participate in all subsequent retransmission processes, causing the mobile terminal to perform unnecessary uplink operations, increasing the number of times the mobile terminal participates in uplink retransmission, thereby increasing the power consumption of the mobile terminal. Summary of the invention
  • the embodiment of the invention provides an uplink hybrid automatic repeat request method and device in a transparent relay network, which can reduce the number of times the mobile terminal participates in uplink retransmission, thereby reducing the power consumption of the mobile terminal.
  • An embodiment of the present invention provides an uplink hybrid automatic repeat request method in a transparent relay network, including: The relay station listens to the uplink data sent by the mobile terminal to the base station and decodes the uplink data;
  • the relay station determines whether the decoding of the uplink data is successful
  • the relay station determines that the decoding of the uplink data is successful, the relay station sends an acknowledgment response message to the base station, and notifies the base station that the relay station has successfully received the uplink data, when the base station fails to successfully decode the uplink data. Sending the confirmation response information to the mobile terminal;
  • the relay station determines that the decoded uplink data is successful, and receives the non-acknowledgment information returned by the base station to the relay station, the relay station sends the intercepted uplink data to the base station, and the non-confirmation information indicates The base station does not successfully decode the uplink data sent by the mobile terminal to the base station.
  • the embodiment of the invention further provides an uplink hybrid automatic repeat request method in a transparent relay network, which includes:
  • the base station determines that the uplink data is not successfully decoded, the base station sends an acknowledgement response message sent by the relay station indicating that the relay station has successfully received the uplink data to the mobile terminal;
  • the base station determines that the uplink data is not successfully decoded, the base station further sends non-confirmation information to the relay station, where the non-acknowledgment information is used when the relay station listens to the uplink data and successfully decodes the The relay station transmits the intercepted uplink data to the base station according to the non-acknowledgment information.
  • An embodiment of the present invention further provides a relay station in a transparent relay network, including:
  • a listening and decoding unit configured to listen to uplink data sent by the mobile terminal to the base station and decode the data; a determining unit, configured to determine whether the intercepting and decoding unit decodes the uplink data is successful; the receiving unit is configured to receive the non-acknowledgment information returned by the base station to the relay station, where the non-acknowledgment information indicates that the base station is not successfully decoded The uplink data sent by the mobile terminal to the base station; the sending unit, configured to: when the determining unit determines that the interception and decoding unit decodes successfully, send an acknowledgement response message to the base station, to notify the base station to The relay station has successfully received the uplink data, and sends the acknowledgement response information to the mobile terminal when the base station fails to successfully decode the uplink data; the data is successful, and the receiving unit receives the non-returned by the base station.
  • the uplink data intercepted by the interception and decoding unit is transmitted to the base station.
  • the embodiment of the invention further provides a base station in a transparent relay network, including:
  • the receiving and decoding unit is configured to receive and decode the uplink data sent by the mobile terminal to the base station, and the determining unit is configured to determine whether the decoding and decoding unit successfully decodes the uplink data, and the sending unit is configured to determine, by the determining unit, When the receiving and decoding unit fails to decode the uplink data, the acknowledgment response message sent by the relay station indicating that the relay station has successfully received the uplink data sent by the mobile terminal to the base station is sent to the mobile terminal; Sending non-confirmation information to the relay station, where the non-confirmation information is used by the relay station to transmit the uplink data to the base station according to the non-confirmation information, when the relay station listens to the uplink data and successfully decodes the data. .
  • the base station when the base station fails to receive the uplink data sent by the mobile terminal to the base station, if the relay station has successfully received the uplink data sent by the mobile terminal, the relay station has successfully received the mobile terminal.
  • the response confirmation information of the uplink data sent by the terminal is sent to the mobile terminal, so that the mobile terminal knows in time that the relay station has successfully received the uplink data sent by the mobile terminal to the base station, and returns the non-acknowledgement response information to the relay station, and the relay station performs subsequent uplink data.
  • Retransmission avoids unnecessary retransmission of the mobile terminal, thereby reducing the number of retransmissions of the mobile terminal, thereby reducing the power consumption of the mobile terminal.
  • FIG. 1 is a schematic flowchart of a method for retransmitting uplink data by a relay station in a transparent relay network according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of a method for uplink hybrid automatic repeat request in a transparent relay network according to Embodiment 2 of the present invention
  • 3 is a schematic flowchart of an uplink hybrid automatic repeat request method in a transparent relay network according to Embodiment 3 of the present invention
  • FIG. 4 is a schematic structural diagram of a relay station in a transparent relay network according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of a physical uplink channel structure of a relay station-base station and a resource map thereof in the prior art and the embodiment of the present invention. detailed description
  • FIG. 1 is a schematic flowchart of a method for retransmitting uplink data by a relay station in a transparent relay network according to an embodiment of the present invention, where the method includes:
  • Step S101 The mobile terminal sends uplink data to the base station.
  • the mobile terminal periodically sends an uplink sounding signal, and the relay station corresponding to the mobile terminal receives the uplink sounding signal to obtain the link channel quality of the uplink mobile terminal-relay station.
  • the relay station uploads the obtained link channel quality of the uplink mobile terminal-relay station to the base station, and the base station performs uplink scheduling according to the link channel quality of the uplink mobile terminal-relay station, and allocates corresponding channel resources to the mobile terminal.
  • the modulation coding mode and the appropriate power size are used to ensure that the relay station can successfully decode the uplink data sent by the mobile terminal.
  • the base station notifies the mobile terminal of the uplink scheduling result, and the mobile terminal sends the uplink data to the base station according to the uplink scheduling result.
  • Step S102 The relay station listens to the uplink data sent by the mobile terminal to the base station and decodes the uplink data.
  • the relay station listens to the physical downlink control channel, and further acquires uplink scheduling information of the base station to the mobile terminal.
  • the relay station listens to and decodes the uplink data sent by the mobile terminal to the base station on the corresponding uplink channel resource according to the obtained uplink scheduling information of the base station to the mobile terminal.
  • Step S103 The relay station determines whether the decoding of the uplink data by the step 102 is successful. If the decoding is successful, the step 104 is performed; otherwise, the step 105 is performed.
  • Step S104 If the result of the determination in step 103 is that the decoding is successful, the acknowledgment response message ACK is sent to the base station, and the base station is notified that the relay station has successfully received the uplink data transmitted by the mobile terminal to the base station.
  • Step S105 If the result of the determination in step 103 is that the decoding is unsuccessful, the non-acknowledgement response message NACK is sent to the base station, and the base station is notified that the relay station has not successfully received the uplink data transmitted by the mobile terminal to the base station.
  • Step S106 The base station receives the uplink data sent by the mobile terminal and performs decoding.
  • the base station receives the uplink data transmitted by the mobile terminal in step 101 and performs decoding.
  • Step S107 The base station determines whether the decoding of the uplink data in step 106 is successful. If the decoding is successful, step 108 is performed; otherwise, step 110 or step 111 is performed.
  • the base station determines that the uplink data is successfully decoded in step 106, it indicates that the base station has successfully received the uplink data transmitted by the mobile terminal to the base station; if the decoding is unsuccessful, it indicates that the base station has not successfully received the uplink data transmitted by the mobile terminal to the base station.
  • Step S108 If the result of the step 107 is that the decoding is successful, the base station sends an acknowledgment response message ACK to the relay station, and informs the relay station that the base station has successfully received the uplink data transmitted by the mobile terminal to the base station.
  • Step S109 If the result of the determination in step 107 is that the decoding is successful, the base station sends an acknowledgement response message.
  • step S108 and step S109 can be performed simultaneously, or sequentially, and the sequence numbers of the steps do not indicate the limitation of the steps.
  • Step S110 If the result of the determination in step 107 is that the decoding is unsuccessful, the base station sends a non-acknowledgement response message NACK to the relay station, notifying the relay station that the base station has not successfully received the uplink data transmitted by the mobile terminal to the base station.
  • Step S111 If the result of the determination in step 107 is that the decoding is not successful, the base station will step 104 or step. The response information returned in step 105 is returned to the mobile terminal.
  • the base station can notify the mobile terminal of the situation in which the relay station listens to and decodes the uplink data transmitted by the mobile terminal to the base station, so that the terminal knows the uplink data sent by the terminal to the base station.
  • the base station returns an ACK, although it is the same as the response information returned in step 108, it means that the uplink data has been successfully received, and only one is successfully received by the relay station, and one is successfully received by the base station. Although the base station does not successfully receive the uplink data sent by the mobile terminal, if the relay station has successfully received the uplink data sent by the mobile terminal, the mobile terminal will receive the ACK returned by the base station, and the mobile terminal will not retransmit the mobile station. For the uplink data, the retransmission action of the uplink data will be completed by the relay station.
  • Step S112 If the relay station receives the non-acknowledgment response information NACK returned by the base station, and the relay station determines in step 103 that the decoding is successful, the relay station transmits the intercepted uplink data to the base station.
  • the relay station like the mobile terminal, periodically transmits an uplink sounding signal for the base station to measure the link channel quality of the uplink relay station-base station. If the base station determines in step 107 that the uplink data sent by the mobile terminal to the base station is not successfully received, and the base station receives the acknowledgment response information ACK indicating that the relay station has successfully received the uplink data sent by the mobile terminal to the base station, the base station according to the measured uplink.
  • the link channel quality of the relay station-base station performs uplink scheduling, allocates appropriate retransmission resources, modulation and coding modes, and appropriate power levels for the relay station, and is used by the relay station to transmit uplink retransmission data to the base station, and sends the scheduling result to the relay station.
  • Step 103 The relay station determines that the decoding is successful, that is, the relay station has successfully received the uplink data sent by the mobile terminal to the base station, and then sends the uplink data to the base station on the uplink retransmission resource allocated by the base station according to the scheduling result sent by the base station, that is, The uplink data that the base station did not successfully receive before is retransmitted.
  • Step S113 If the base station successfully receives the uplink data retransmitted by the relay station, it returns an ACK; if the base station does not successfully receive the uplink data retransmitted by the relay station, it returns a NACK.
  • Step S114 If the relay station receives the ACK returned by the base station in step 113, the relay station deletes the buffered uplink data, and ends the uplink hybrid automatic retransmission process.
  • Step 115 If the relay station receives the NACK returned by the base station in step 113, the relay station continues to retransmit the uplink data until receiving the acknowledgement response information ACK returned by the base station.
  • the base station when the base station fails to receive the uplink data sent by the mobile terminal to the base station, if the relay station has successfully received the uplink data sent by the mobile terminal, the base station sends the response confirmation information of the uplink data that the relay station has successfully received the mobile terminal to the mobile terminal.
  • the terminal enables the mobile terminal to know in time that the relay station has successfully received the uplink data sent by the mobile terminal to the base station, and returns the non-acknowledgement response information to the relay station, and the relay station performs subsequent uplink data retransmission, thereby avoiding unnecessary retransmission of the mobile terminal.
  • the number of retransmissions of the mobile terminal is reduced, thereby reducing the power consumption of the mobile terminal.
  • the interference caused by the retransmission of the mobile terminal to the data transmission of other mobile terminals in the transparent relay network is also reduced.
  • FIG. 2 is a schematic flowchart of an uplink hybrid automatic repeat request method in a transparent relay network according to Embodiment 2 of the present invention, where the method includes:
  • Step 200 The relay station listens to the uplink data sent by the mobile terminal to the base station and decodes the uplink data.
  • the mobile terminal periodically sends an uplink sounding signal, and the relay station corresponding to the mobile terminal receives the uplink sounding signal to obtain the link channel quality of the uplink mobile terminal-relay station.
  • the relay station will receive The uplink channel of the uplink mobile terminal-relay station is uploaded to the base station, and the base station performs uplink scheduling according to the link channel quality of the uplink mobile terminal-relay station, and allocates corresponding channel resources and modulation and coding modes for the mobile terminal. And a suitable power level, etc., to ensure that the relay station can successfully decode the uplink data sent by the mobile terminal.
  • the base station notifies the mobile terminal of the uplink scheduling result, and the mobile terminal sends the uplink data to the base station according to the uplink scheduling result.
  • the relay station listens to the physical downlink control channel, and further acquires uplink scheduling information of the base station to the mobile terminal.
  • the relay station listens to and decodes the uplink data sent by the mobile terminal to the base station on the corresponding uplink channel resource according to the obtained uplink scheduling information of the base station to the mobile terminal.
  • Step 220 The relay station determining step 200 decodes whether the uplink data is successful. When it is determined that the decoding is successful, step 240 or 260 is performed. When the relay station determines that the decoding of the uplink data is successful, the relay station caches the uplink data.
  • Step 240 The relay station sends an acknowledgment response message to the base station, and notifies the base station that the relay station has successfully received the uplink data sent by the mobile terminal to the base station, and sends the acknowledgment response information to the mobile terminal when the base station fails to successfully decode the uplink data.
  • the mobile terminal can know in time that the relay station has successfully received the uplink data sent by the mobile terminal to the base station, thereby avoiding unnecessary retransmission of the mobile terminal.
  • Step 260 When the relay station receives the non-acknowledgment information returned by the base station, if the step 220 determines that the decoding is successful, the intercepted uplink data is sent to the base station, and the non-acknowledgment information indicates that the base station is not successfully decoded. The uplink data sent by the mobile terminal to the base station.
  • the embodiment of the present invention may further include: after transmitting the intercepted uplink data to the base station, if receiving the response confirmation information ACK returned by the base station, the base station has successfully received the uplink data retransmitted by the relay station. Then, the uplink data sent by the previously buffered mobile terminal is deleted.
  • the relay station determines in step 220 that the decoding is successful, it indicates that the relay station has successfully received the uplink data sent by the mobile terminal to the base station, and when receiving the non-acknowledgment information returned by the base station, the relay station sends the intercepted uplink data to the station.
  • the base station that is, the uplink data that is not successfully received by the previous base station is retransmitted by the relay station.
  • the base station when the base station fails to receive the uplink data sent by the mobile terminal to the base station, if the relay station has successfully received the uplink data sent by the mobile terminal, the base station sends the response confirmation information of the uplink data that the relay station has successfully received the mobile terminal to the mobile terminal.
  • the terminal enables the mobile terminal to know in time that the relay station has successfully received the uplink data sent by the mobile terminal to the base station, and returns the non-acknowledgement response information to the relay station, and the relay station performs subsequent uplink data retransmission, thereby avoiding unnecessary retransmission of the mobile terminal.
  • the number of retransmissions of the mobile terminal is reduced, thereby reducing the power consumption of the mobile terminal.
  • the interference caused by the retransmission of the mobile terminal to the data transmission of other mobile terminals in the transparent relay network is also reduced.
  • FIG. 3 it is a schematic flowchart of an uplink hybrid automatic repeat request method in a transparent relay network according to Embodiment 3 of the present invention, where the method includes:
  • Step 300 The base station receives uplink data sent by the mobile terminal to the base station and performs decoding.
  • the mobile terminal periodically sends an uplink sounding signal, and the relay station corresponding to the mobile terminal receives the uplink sounding signal to obtain the link channel quality of the uplink mobile terminal-relay station.
  • the relay station will receive The uplink channel of the uplink mobile terminal-relay station is uploaded to the base station, and the base station performs uplink scheduling according to the link channel quality of the uplink mobile terminal-relay station, and allocates corresponding channel resources and modulation and coding modes for the mobile terminal. And a suitable power level, etc., to ensure that the relay station can successfully decode the uplink data sent by the mobile terminal.
  • the base station notifies the mobile terminal of the uplink scheduling result, and the mobile terminal sends the uplink data to the base station according to the uplink scheduling result, and the base station receives the uplink data sent by the mobile terminal and performs decoding.
  • Step 320 The base station determines whether the decoding of the uplink data in step 300 is successful. If the decoding is not successful, step 340 or step 360 is performed.
  • Step 340 The base station sends an acknowledgment response message sent by the relay station indicating that the relay station has successfully received the uplink data sent by the mobile terminal to the base station to the mobile terminal. In this way, the mobile terminal can know in time that the relay station has successfully received the uplink data sent by the mobile terminal to the base station, thereby avoiding unnecessary retransmission of the mobile terminal.
  • Step 360 The base station sends non-acknowledgment information to the relay station, where the non-acknowledgment information is used by the relay station to listen to the uplink data and successfully decode, the relay station sends the intercepted uplink data to the base station according to the non-acknowledgment information. .
  • step 340 and step 360 there is no strict sequence, and the base station can simultaneously send the acknowledgement response message in step 340 and the non-confirmation message in step 360, or both can be sent at random, without affecting the present invention.
  • step 320 If it is determined in step 320 that the base station does not successfully decode the uplink data, that is, the base station does not successfully receive the uplink data sent by the mobile terminal, the base station sends the non-confirmation information to the relay station. After receiving the non-acknowledgment information, the relay station can learn that the base station does not successfully receive the uplink data sent by the mobile terminal.
  • the relay The station When the base station receives the uplink data sent by the mobile terminal to the base station and decodes it in step 300, the relay The station also listens to the uplink data sent by the mobile terminal to the base station and decodes it. Specifically, when the base station notifies the mobile terminal of the uplink scheduling result, the relay station listens to the physical downlink control channel, and further acquires uplink scheduling information of the base station to the mobile terminal. The relay station listens to and decodes the uplink data sent by the mobile terminal to the base station on the corresponding uplink channel resource according to the obtained uplink scheduling information of the base station to the mobile terminal.
  • the relay station determines that the decoding is successful, it indicates that the relay station has successfully received the uplink data sent by the mobile terminal to the base station, and if receiving the non-acknowledgment information sent by the base station to the relay station, the relay station will uplink the interception according to the non-acknowledgment information. Data is sent to the base station.
  • the base station when the base station fails to receive the uplink data sent by the mobile terminal to the base station, if the relay station has successfully received the uplink data sent by the mobile terminal, the base station sends the response confirmation information of the uplink data that the relay station has successfully received the mobile terminal to the mobile terminal.
  • the terminal enables the mobile terminal to know in time that the relay station has successfully received the uplink data sent by the mobile terminal to the base station, and returns the non-acknowledgement response information to the relay station, and the relay station performs subsequent uplink data retransmission, thereby avoiding unnecessary retransmission of the mobile terminal.
  • the number of retransmissions of the mobile terminal is reduced, thereby reducing the power consumption of the mobile terminal.
  • the interference caused by the retransmission of the mobile terminal to the data transmission of other mobile terminals in the transparent relay network is also reduced.
  • FIG. 4 it is a schematic structural diagram of a relay station in a transparent relay network according to an embodiment of the present invention.
  • the relay station includes a listening and decoding unit 420, a determining unit 440, a receiving unit 460, and a sending unit 480.
  • the intercepting and decoding unit 420 is configured to listen to uplink data sent by the mobile terminal to the base station and decode the uplink data.
  • the mobile terminal periodically sends an uplink sounding signal corresponding to the relay station of the mobile terminal.
  • the receiving unit 460 receives the uplink sounding signal to obtain the link channel quality of the uplink mobile terminal-relay station.
  • the transmitting unit 480 of the relay station uploads the obtained link channel quality of the uplink mobile terminal-relay station to the base station, and the base station performs uplink scheduling according to the link channel quality of the uplink mobile terminal-relay station, and allocates the uplink scheduling for the mobile terminal. Corresponding channel resources, modulation and coding modes, and appropriate power levels, etc., to ensure that the relay station can successfully decode the uplink data sent by the mobile terminal.
  • the base station notifies the mobile terminal of the uplink scheduling result, and the mobile terminal sends the uplink data to the base station according to the uplink scheduling result.
  • the intercepting and decoding unit 420 of the relay station listens to the physical downlink control channel, and further acquires uplink scheduling information of the base station to the mobile terminal.
  • the intercepting and decoding unit 420 intercepts and decodes the uplink data sent by the mobile terminal to the base station on the corresponding uplink channel resource according to the obtained uplink scheduling information of the mobile station by the base station.
  • the determining unit 440 is configured to determine whether the intercepting and decoding unit 420 decodes the uplink data successfully. When the determining unit 440 determines that the decoding and decoding unit 420 successfully decodes, it indicates that the listening and decoding unit 420 has successfully received the uplink data sent by the mobile terminal to the base station. The listening and decoding unit 420 is further configured to cache the uplink data when the determining unit 440 determines that the decoding is successful.
  • the receiving unit 460 is configured to receive the non-acknowledgment information returned by the base station to the relay station, where the non-acknowledgment information indicates that the base station does not successfully decode the uplink data that the mobile terminal sends to the base station.
  • the mobile terminal sends uplink data to the base station, and the base station receives uplink data sent by the mobile terminal and performs decoding, and determines whether the decoding is successful. If it is determined that the decoding is not successful, the base station sends a non-confirmation to the receiving unit 460 of the relay station. And the non-acknowledgment information indicates that the base station does not successfully decode the uplink data that the mobile terminal sends to the base station.
  • the sending unit 480 is configured to: when the determining unit 440 determines that the decoding and decoding unit 420 successfully decodes, send the acknowledgement response information to the base station, and notify the base station that the relay station has successfully received the uplink data sent by the mobile terminal to the base station, when the base station The acknowledgment response information is transmitted to the mobile terminal when the uplink data is not successfully decoded. In this way, the mobile terminal can know in time that the relay station has successfully received the uplink data sent by the mobile terminal to the base station, thereby avoiding unnecessary retransmission of the mobile terminal.
  • the sending unit 480 is further configured to: when the determining unit 440 determines that the intercepting and decoding unit 420 successfully decodes the uplink data, and the receiving unit 460 receives the non-confirmed information returned by the base station, The uplink data intercepted by the interception and decoding unit 420 is transmitted to the base station.
  • the intercepting and decoding unit 420 is further configured to: if the receiving unit 460 receives the response confirmation information returned by the base station, where the response confirmation information indicates that the base station has successfully received the uplink data retransmitted by the relay station, deleting the cache Upstream data.
  • the base station when the base station fails to receive the uplink data sent by the mobile terminal to the base station, if the relay station has successfully received the uplink data sent by the mobile terminal, the base station sends the response confirmation information of the uplink data that the relay station has successfully received the mobile terminal to the mobile terminal.
  • the terminal enables the mobile terminal to know in time that the relay station has successfully received the uplink data sent by the mobile terminal to the base station, and returns the non-acknowledgement response information to the relay station, and the relay station performs subsequent uplink data retransmission, thereby avoiding unnecessary retransmission of the mobile terminal.
  • the number of retransmissions of the mobile terminal is reduced, thereby reducing the power consumption of the mobile terminal.
  • the interference caused by the retransmission of the mobile terminal to the data transmission of other mobile terminals in the transparent relay network is also reduced.
  • the base station includes a receiving and decoding unit 520, a determining unit 540, and a sending unit 560. It can be understood that the base station may further include a scheduling unit 580.
  • the receiving and decoding unit 520 is configured to receive and decode uplink data sent by the mobile terminal to the base station.
  • the mobile terminal periodically sends an uplink sounding signal, and the relay station corresponding to the mobile terminal receives the uplink sounding signal to obtain the link channel quality of the uplink mobile terminal-relay station.
  • the relay station uploads the obtained link channel quality of the uplink mobile terminal-relay station to the base station, and the scheduling unit 580 of the base station performs uplink scheduling according to the link channel quality of the uplink mobile terminal-relay station, for the mobile terminal.
  • the corresponding channel resources, modulation and decoding modes, and appropriate power levels are allocated to ensure that the relay station can successfully decode the uplink data sent by the mobile terminal.
  • the base station notifies the mobile terminal of the uplink scheduling result by the sending unit 560, and the mobile terminal sends the uplink data to the base station according to the uplink scheduling result, and the receiving and decoding unit 520 of the base station receives the uplink data sent by the mobile terminal and performs decoding.
  • the determining unit 540 is configured to determine whether the receiving and decoding unit 520 successfully decodes the uplink data. If the decoding is successful, it indicates that the base station successfully receives the uplink data sent by the mobile terminal; if the decoding is unsuccessful, it indicates that the base station does not successfully receive the uplink data sent by the mobile terminal.
  • the sending unit 560 is configured to: when the determining unit 540 determines that the receiving and decoding unit 520 fails to decode the uplink data, the acknowledgment response sent by the relay station indicating that the relay station has successfully received the uplink data sent by the mobile terminal to the base station The message is sent to the mobile terminal. In this way, the mobile terminal can know in time that the relay station has successfully received the uplink data sent by the mobile terminal to the base station, thereby avoiding unnecessary retransmission of the mobile terminal.
  • the sending unit 560 is further configured to determine, by the determining unit 540, the receiving and decoding unit.
  • the relay station When the base station receives and decodes the uplink data transmitted by the mobile terminal to the base station, the relay station also listens to the uplink data transmitted by the mobile terminal to the base station and decodes the uplink data. Specifically, when the base station notifies the mobile terminal of the uplink scheduling result, the relay station listens to the physical downlink control channel, and further acquires uplink scheduling information of the base station to the mobile terminal. The relay station listens to and decodes the uplink data sent by the mobile terminal to the base station on the corresponding uplink channel resource according to the obtained uplink scheduling information of the base station to the mobile terminal.
  • the relay station determines that the decoding is successful, it indicates that the relay station has successfully received the uplink data sent by the mobile terminal to the base station, and if the transmitting unit 560 of the base station receives the non-acknowledgment information sent to the relay station, the relay station will refer to the non-acknowledgment information according to the non-confirmation information.
  • the monitored uplink data is sent to the base station.
  • the base station when the base station fails to receive the uplink data sent by the mobile terminal to the base station, if the relay station has successfully received the uplink data sent by the mobile terminal, the base station sends the response confirmation information of the uplink data that the relay station has successfully received the mobile terminal to the mobile terminal.
  • the terminal enables the mobile terminal to know in time that the relay station has successfully received the uplink data sent by the mobile terminal to the base station, and returns the non-acknowledgement response information to the relay station, and the relay station performs subsequent uplink data retransmission, thereby avoiding unnecessary retransmission of the mobile terminal.
  • the number of retransmissions of the mobile terminal is reduced, thereby reducing the power consumption of the mobile terminal.
  • the interference caused by the retransmission of the mobile terminal to the data transmission of other mobile terminals in the transparent relay network is also reduced.
  • FIG. 6 is a schematic diagram of a physical uplink control channel structure and resource mapping of a relay station and a base station according to an embodiment of the present invention.
  • the physical uplink control channel PUCCH is used to transmit ACK/NACK information.
  • the physical uplink control channel structure is as shown in FIG. 6( a ), and one physical uplink control channel corresponds to two resource blocks on two time slots in one subframe (1 ms), for example, FIG. 6 ( a ) indicates four physical uplink control channels, where each shaded portion A physical resource block representing the same physical resource control block has the same physical uplink control channel PUCCH.
  • the existing physical uplink control channel PUCCH is mapped to the system with high and low transmission bandwidth. Two resource blocks at both ends are distributed in two slots of one subframe (that is, one subframe is occupied in time).
  • the LTE standard stipulates that the uplink hybrid automatic repeat request (HARQ) adopts a synchronous manner, that is, the time domain position of each hybrid automatic repeat request (HARQ) retransmission is limited to a predetermined good position.
  • the mobile terminal receives the response information sent by the base station.
  • the base station processing relay station sends a response message (ACK/NACK) to reserve a certain amount. The time (at least 0.5 ms) to ensure that the base station can forward the ACK information fed back by the relay station to the mobile terminal at the next subframe transmission time after processing the signaling message.
  • the relay station If the relay station continues to follow the existing LTE protocol, the relay station sends a response message (ACK/NACK) to the base station, which takes 1 ms, and cannot reserve enough time for the base station to process the response message (ACK/NACK), thereby failing to implement the same LTE protocol.
  • ACK/NACK response message
  • HARQ Hybrid Automatic Repeat Request
  • the relay station sends ACK/NACK information on the relay station-base station physical uplink control channel PUCCH, and the PUCCH channel is restricted to be transmitted within 0.5 ms (ie, 1 time slot).
  • PUCCH physical uplink control channel
  • one PUCCH channel is mapped to two resource blocks with high and low transmission bandwidths in one slot to ensure that the relay station sends an ACK to the base station within 0.5 ms.
  • NACK feedback so that the processing time is reserved for the eNB to decode and process the response message (ACK/NACK) sent by the relay station, thereby enabling a hybrid automatic repeat request (HARQ) in a synchronous manner.
  • HARQ hybrid automatic repeat request
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

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Description

一种透明中继网络中的上行' 自动重传请求方法^置 本申请要求于 2009年 9月 29日提交中国专利局，申请号为 200910110719.X, 发明名称为 "一种透明中继网络中的上行混合自动重传请求方法及装置 "的中 国专利申请的优先权， 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及通信技术领域，尤其涉及一种透明中继网络中的上行混合自动 重传请求方法及装置。
背景技术
无线中继的基本思想是使用中继站将基站的信号重新处理后再发送出去。 由于其实现成本较低， 中继站被运营商广泛部署， 用于改善蜂窝小区边缘用户 的通信体验及扩大小区覆盖范围。 作为 B3G/4G的热点技术， 无线中继主要用 于扩充蜂窝小区的覆盖范围和提升系统的吞吐量。透明的中继方式是指在蜂窝 小区中， 移动终端不能感知中继站的存在。 目前 3GPP标准组织中的 LTE-A标准正在讨论的 type II 中继方式即为透 明中继的方式， 由于在该中继系统中， 移动终端不知道中继站的存在， 使得这 种透明的中继系统能较好的实现对现有 LTE Rel-8终端的后向兼容。 混合自动重传请求 ( Hybrid Automatic Repeat reQuest, HARQ )是 LTE标 准在物理层采用的信道自适应方法之一，即发送端持续的以一定的编码调制方 式向接收端发送（重传）数据， 直到接收端成功解码， 反馈确认消息 （ACK ) 为止。 目前标准中讨论的透明中继方式利用物理层的 HARQ过程来实现， 其基 本流程如下：
1、 中继站侦听（即在特定信道上接收）移动终端 （或基站）发送的数据 并成功解码；
2、 中继站参与重传过程， 向基站（或移动终端）发送重传数据。
现有技术中一种透明中继网络中的上行混合自动重传请求方法的具体过 程如下：
移动终端向基站发送上行数据， 中继站侦听并解码该数据；
基站向移动终端发送响应消息（ACK/NACK ), 反馈基站的解码情况； 中 继站则向基站发送响应消息， 反馈中继站的解码情况；
若移动终端接收到 NACK信息， 则执行上行重传操作； 与此同时， 若中 继站已经解码成功， 也参与到上行重传过程。
在实现本发明的过程中，发明人发现现有技术中至少存在如下问题： 只要 基站没有成功接收到移动终端的上行数据， 即使中继站已经成功接收， 移动终 端还是会接收到基站反馈的 NACK信息， 所以移动终端就必须参与后续所有 重传过程，造成移动终端执行了不必要的上行操作，增加了移动终端参与上行 重传的次数， 进而增加了移动终端的功耗。 发明内容
本发明实施例提供一种透明中继网络中的上行混合自动重传请求方法及 装置， 可减少移动终端参与上行重传的次数， 进而降低移动终端的功耗。
本发明实施例提供一种透明中继网络中的上行混合自动重传请求方法，包 括： 中继站侦听移动终端向基站发送的上行数据并进行解码；
所述中继站判断解码上行数据是否成功；
当所述中继站判断解码上行数据成功时，所述中继站发送确认响应信息给 所述基站， 通知所述基站所述中继站已经成功接收所述上行数据， 当所述基站 未成功解码所述上行数据时将所述确认响应信息发送给所述移动终端；
当所述中继站判断解码上行数据成功，并接收到所述基站向所述中继站返 回的非确认信息时， 所述中继站将所述侦听的上行数据发送至所述基站， 所述 非确认信息表示所述基站未成功解码所述移动终端向所述基站发送的上行数 据。
本发明实施例还提供一种透明中继网络中的上行混合自动重传请求方法， 包括：
基站接收移动终端向基站发送的上行数据并进行解码；
所述基站判断对所述上行数据进行解码是否成功；
若所述基站判断对所述上行数据进行解码未成功，所述基站将所述中继站 发送的表示中继站已经成功接收所述上行数据的确认响应消息发送给所述移 动终端；
若所述基站判断对所述上行数据进行解码未成功，所述基站还向所述中继 站发送非确认信息，所述非确认信息用以所述中继站侦听所述上行数据并成功 解码时，所述中继站根据所述非确认信息将所述侦听的上行数据发送至所述基 站。
本发明实施例还提供一种透明中继网络中的中继站， 包括：
侦听及解码单元， 用于侦听移动终端向基站发送的上行数据并进行解码； 判断单元， 用于判断所述侦听及解码单元解码上行数据是否成功； 接收单元， 用于接收所述基站向所述中继站返回的非确认信息， 所述非确 认信息表示所述基站未成功解码所述移动终端向所述基站发送的上行数据； 发送单元， 用于在所述判断单元判断所述侦听及解码单元解码成功时， 发 送确认响应信息给所述基站，通知所述基站所述中继站已经成功接收所述上行 数据，当所述基站未成功解码所述上行数据时将所述确认响应信息发送给所述 移动终端； 数据成功， 且所述接收单元接收到所述基站返回的非确认信息时，将所述侦听 及解码单元侦听的上行数据发送至所述基站。
本发明实施例还提供一种透明中继网络中的基站， 包括：
接收及解码单元， 用于收移动终端向基站发送的上行数据并进行解码； 判断单元， 用于判断所述接收及解码单元对上行数据解码是否成功； 发送单元，用于在所述判断单元判断所述接收及解码单元对上行数据解码 未成功时，将中继站发送的表示所述中继站已经成功接收移动终端发送给基站 的上行数据的确认响应消息发送给所述移动终端； 据解码未成功时， 向所述中继站发送非确认信息， 所述非确认信息用以中继站 侦听所述上行数据并成功解码时，所述中继站根据所述非确认信息将所述侦听 的上行数据发送至所述基站。
本发明实施例基站在未成功接收移动终端发送给基站的上行数据时，若中 继站已经成功接收移动终端发送的上行数据，则将中继站已经成功接收移动终 端发送的上行数据的响应确认信息发送给移动终端，使移动终端及时获知中继 站已经成功接收了移动终端发送给基站的上行数据，同时将非确认响应信息返 回给中继站， 由中继站执行后续的上行数据重传，避免了移动终端不必要的重 传， 由此减少了移动终端的重传次数， 进而减低了移动终端的功耗。
附图说明
为了更清楚地说明本发明实施例中的技术方案， 下面将对实施例描述中 所需要使用的附图作简单地介绍，显而易见地， 下面描述中的附图仅仅是本发 明的一些实施例，对于本领域普通技术人员来讲， 在不付出创造性劳动性的前 提下， 还可以根据这些附图获得其他的附图。 图 1是本发明实施例一透明中继网络中通过中继站重传上行数据方法的流 程示意图； 图 2是本发明实施例二透明中继网络中的上行混合自动重传请求方法的流 程示意图； 图 3是本发明实施例三透明中继网络中的上行混合自动重传请求方法的流 程示意图； 图 4是本发明实施例透明中继网络中的中继站的结构示意图； 图 5是本发明实施例透明中继网络中的基站的结构示意图；
图 6是现有技术和本发明实施例中继站-基站物理上行通道结构及其资源映 射示意图。 具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白， 以下结合附图及实 施方式， 对本发明进行进一步详细说明。 应当理解， 此处所描述的具体实施方 式仅仅用于解释本发明， 并不用于限定本发明。
请参考图 1， 为本发明实施例一透明中继网络中通过中继站重传上行数据 方法的流程示意图， 所述方法包括：
步骤 S101 : 移动终端向基站发送上行数据。
移动终端会定期发送上行探测信号，对应所述移动终端的中继站接收所述 上行探测信号以获得上行移动终端 -中继站的链路信道质量。 所述中继站将获 得的所述上行移动终端-中继站的链路信道质量上传至基站， 基站根据所述上 行移动终端 -中继站的链路信道质量执行上行调度， 为所述移动终端分配相应 的信道资源、调制编码方式及合适的功率大小等， 以尽量保证中继站可以成功 解码所述移动终端发送的上行数据。基站将上行调度结果通知移动终端，移动 终端根据所述上行调度结果向基站发送上行数据。
步骤 S102: 中继站侦听移动终端向基站发送的上行数据并进行解码。 基站将上行调度结果通知移动终端时， 中继站会侦听物理下行控制信道， 进而获取基站对移动终端的上行调度信息。在步骤 102中， 中继站根据获取的 基站对移动终端的上行调度信息，在相应的上行信道资源上侦听移动终端向基 站发送的上行数据并进行解码。
步骤 S103: 中继站判断步骤 102对上行数据进行解码是否成功， 若解码 成功则执行步骤 104， 否则执行步骤 105。
若中继站判断步骤 102对上行数据进行解码成功，则表示中继站已经成功 接收了移动终端传送给基站的上行数据； 如果解码未成功， 则表示中继站未成 功接收移动终端传送给基站的上行数据。所述中继站在判断解码上行数据成功 时， 对所述上行数据进行緩存。 步骤 S104: 若步骤 103判断结果为解码成功， 则发送确认响应信息 ACK 给基站， 通知基站中继站已经成功接收了移动终端传送给基站的上行数据。
步骤 S105: 若步骤 103判断结果为解码未成功， 则发送非确认响应信息 NACK给基站， 通知基站中继站未成功接收移动终端传送给基站的上行数据。
步骤 S106: 基站接收移动终端发送的上行数据并进行解码。 基站接收步 骤 101中移动终端发送的上行数据并进行解码。
步骤 S107: 基站判断步骤 106中对上行数据进行解码是否成功， 若解码 成功则执行步骤 108， 否则执行步骤 110或步骤 111。
若基站判断步骤 106对上行数据进行解码成功，则表示基站已经成功接收 了移动终端传送给基站的上行数据； 如果解码未成功， 则表示基站未成功接收 移动终端传送给基站的上行数据。
步骤 S108: 若步骤 107判断结果为解码成功， 则基站发送确认响应信息 ACK给中继站， 通知中继站基站已经成功接收了移动终端传送给基站的上行 数据。
步骤 S109: 若步骤 107判断结果为解码成功， 则基站发送确认响应信息
ACK给移动终端， 通知移动终端基站已经成功接收了移动终端传送给基站的 上行数据。 可以理解的是， 步骤 S108和步骤 S109可以同时进行， 或者先后进 行， 步骤的序号并不表示对步骤先后的限制。
步骤 S110: 若步骤 107判断结果为解码未成功， 则基站发送非确认响应 信息 NACK给中继站， 通知中继站基站未成功接收移动终端传送给基站的上 行数据。
步骤 S111 : 若步骤 107判断结果为解码未成功， 则基站将步骤 104或步 骤 105返回的响应信息返回给移动终端。
因为中继站对于移动终端是透明的， 移动终端并不能感知到中继站的存 在， 所以中继站并不能将响应消息直接发送给移动终端。 通过这个步骤， 基站 可以将中继站对于侦听并解码移动终端发送给基站的上行数据的情况通知给 移动终端， 使得终端了解其发送给基站的上行数据的情况。
若基站返回的是 ACK， 虽然与步骤 108返回的响应信息一样， 但是都是 表示上行数据已经被成功接收， 只是一个是被中继站成功接收， 一个是被基站 成功接收。基站虽然并未成功接收移动终端发送的上行数据，但若此时中继站 已经成功接收移动终端发送的上行数据，则此时移动终端将会收到基站返回的 ACK,移动终端就不会重传所述上行数据，所述上行数据的重传动作将由中继 站来完成。
步骤 S112: 若中继站接收到基站返回的非确认响应信息 NACK， 且步骤 103中继站判断解码是成功的， 则中继站将所述侦听的上行数据发送至基站。
中继站与移动终端一样会定期发送上行探测信号，用于基站测量上行中继 站-基站的链路信道质量。 若步骤 107基站判断未成功接收移动终端发送给基 站的上行数据，且基站接收到步骤 104发送的表示中继站已经成功接收移动终 端发送给基站的上行数据的确认响应信息 ACK， 则基站根据测量的上行中继 站-基站的链路信道质量执行上行调度， 为中继站分配适当的重传资源、 调制 编码方式及合适的功率大小等， 用于中继站发送上行重传数据给基站， 并将调 度结果发送给中继站。
中继站在接收到基站返回的非确认响应信息 NACK后， 通过所述非确认 响应信息 NACK得知基站未成功接收移动终端发送给基站的上行数据， 若步 骤 103中继站判断解码是成功的，即中继站已经成功接收移动终端发送给基站 的上行数据， 则根据基站发送的调度结果，在基站分配的上行重传资源上将所 述上行数据发送至基站， 即将之前基站未成功接收的上行数据进行重传。
步骤 S113: 若基站成功接收中继站重传的上行数据， 则返回 ACK; 若基 站未成功接收中继站重传的上行数据， 则返回 NACK。
步骤 S114: 若中继站收到步骤 113中基站返回的 ACK， 则中继站删除緩 存的上行数据， 结束上行混合自动重传过程。
步骤 115: 若中继站收到步骤 113中基站返回的 NACK， 则中继站继续重 传所述上行数据， 直至接收到基站返回的确认响应信息 ACK为止。
本发明实施例基站在未成功接收移动终端发送给基站的上行数据时，若中 继站已经成功接收移动终端发送的上行数据，则将中继站已经成功接收移动终 端发送的上行数据的响应确认信息发送给移动终端，使移动终端及时获知中继 站已经成功接收了移动终端发送给基站的上行数据，同时将非确认响应信息返 回给中继站， 由中继站执行后续的上行数据重传，避免了移动终端不必要的重 传， 由此减少了移动终端的重传次数， 进而减低了移动终端的功耗。 同时由于 移动终端重传次数的减少，也减少了由于移动终端的重传对于透明中继网络中 其他移动终端的数据传输造成的干扰。
请参考图 2， 为本发明实施例二透明中继网络中的上行混合自动重传请求 方法的流程示意图， 所述方法包括：
步骤 200: 中继站侦听移动终端向基站发送的上行数据并进行解码。 移动终端会定期发送上行探测信号，对应所述移动终端的中继站接收所述 上行探测信号以获得上行移动终端 -中继站的链路信道质量。 所述中继站将获 得的所述上行移动终端-中继站的链路信道质量上传至基站， 基站根据所述上 行移动终端 -中继站的链路信道质量执行上行调度， 为所述移动终端分配相应 的信道资源、调制编码方式及合适的功率大小等， 以尽量保证中继站可以成功 解码所述移动终端发送的上行数据。基站将上行调度结果通知移动终端，移动 终端根据所述上行调度结果向基站发送上行数据。
基站将上行调度结果通知移动终端时， 中继站会侦听物理下行控制信道， 进而获取基站对移动终端的上行调度信息。在步骤 200中， 中继站根据获取的 基站对移动终端的上行调度信息，在相应的上行信道资源上侦听移动终端向基 站发送的上行数据并进行解码。
步骤 220: 中继站判断步骤 200解码上行数据是否成功， 当判断解码成功 时， 执行步骤 240或 260。 所述中继站在判断解码上行数据成功时， 对所述上 行数据进行緩存。
步骤 240: 中继站发送确认响应信息给基站， 通知基站中继站已经成功接 收移动终端发送给基站的上行数据，当基站未成功解码所述上行数据时将所述 确认响应信息发送给移动终端。这样可以使移动终端及时获知中继站已经成功 接收了移动终端发送给基站的上行数据， 避免了移动终端不必要的重传。
步骤 260: 中继站接收到所述基站返回的非确认信息时， 若步骤 220判断 解码成功， 则将所述侦听的上行数据发送至所述基站， 所述非确认信息表示所 述基站未成功解码所述移动终端向所述基站发送的上行数据。
所述移动终端向所述基站发送上行数据，所述基站接收移动终端发送的上 行数据并进行解码， 并判断解码是否成功， 如果判断解码未成功， 则向所述中 继站发送非确认信息，所述非确认信息表示所述基站未成功解码所述移动终端 向所述基站发送的上行数据。
本发明实施例在步骤 260后还可以包括：将所述侦听的上行数据发送至所 述基站后， 若接收到基站返回的响应确认信息 ACK， 即表示基站已经成功接 收中继站重传的上行数据，则对之前緩存的侦听到的移动终端发送的上行数据 进行删除。
当中继站在步骤 220中判断解码成功时，表示中继站已经成功接收移动终 端向所述基站发送的上行数据， 当接收到基站返回的非确认信息时， 中继站将 所述侦听的上行数据发送至所述基站，即通过所述中继站将之前基站未成功接 收的上行数据进行重传。
本发明实施例基站在未成功接收移动终端发送给基站的上行数据时，若中 继站已经成功接收移动终端发送的上行数据，则将中继站已经成功接收移动终 端发送的上行数据的响应确认信息发送给移动终端，使移动终端及时获知中继 站已经成功接收了移动终端发送给基站的上行数据，同时将非确认响应信息返 回给中继站， 由中继站执行后续的上行数据重传，避免了移动终端不必要的重 传， 由此减少了移动终端的重传次数， 进而减低了移动终端的功耗。 同时由于 移动终端重传次数的减少，也减少了由于移动终端的重传对于透明中继网络中 其他移动终端的数据传输造成的干扰。
请参考图 3， 为本发明实施例三透明中继网络中的上行混合自动重传请求 方法的流程示意图， 所述方法包括：
步骤 300: 基站接收移动终端向基站发送的上行数据并进行解码。
移动终端会定期发送上行探测信号，对应所述移动终端的中继站接收所述 上行探测信号以获得上行移动终端 -中继站的链路信道质量。 所述中继站将获 得的所述上行移动终端-中继站的链路信道质量上传至基站， 基站根据所述上 行移动终端 -中继站的链路信道质量执行上行调度， 为所述移动终端分配相应 的信道资源、调制编码方式及合适的功率大小等， 以尽量保证中继站可以成功 解码所述移动终端发送的上行数据。基站将上行调度结果通知移动终端，移动 终端根据所述上行调度结果向基站发送上行数据，基站接收移动终端发送的上 行数据并进行解码。
步骤 320: 基站判断步骤 300中对上行数据进行解码是否成功， 若解码未 成功则执行步骤 340或步骤 360。
步骤 340: 基站将中继站发送的表示中继站已经成功接收移动终端发送给 基站的上行数据的确认响应消息发送给移动终端。这样可以使移动终端及时获 知中继站已经成功接收了移动终端发送给基站的上行数据，避免了移动终端不 必要的重传。
步骤 360: 基站向中继站发送非确认信息， 所述非确认信息用以中继站侦 听所述上行数据并成功解码时，中继站根据所述非确认信息将所述侦听的上行 数据发送至所述基站。
可以理解的是， 步骤 340和步骤 360并没有严格的先后顺序，基站可以同 时发送步骤 340中的确认响应消息和步骤 360中的非确认信息，也可以两者随 意先后发送， 并不影响本发明实施例的实现。
若步骤 320中判断基站对上行数据进行解码未成功，即表示基站未成功接 收移动终端发送的上行数据， 则基站向中继站发送非确认信息。 所述中继站接 收到所述非确认信息后， 即可获知基站未成功接收移动终端发送的上行数据。
在步骤 300基站接收移动终端向基站发送的上行数据并进行解码时，中继 站也会侦听移动终端向基站发送的上行数据并进行解码。 具体的，基站将上行 调度结果通知移动终端时， 中继站会侦听物理下行控制信道， 进而获取基站对 移动终端的上行调度信息。 中继站根据获取的基站对移动终端的上行调度信 息， 在相应的上行信道资源上侦听移动终端向基站发送的上行数据并进行解 码。
当中继站判断解码成功时，即表示中继站已经成功接收到移动终端发送给 基站的上行数据， 若接收到基站向中继站发送的非确认信息， 则中继站根据所 述非确认信息将所述侦听的上行数据发送至所述基站。
本发明实施例基站在未成功接收移动终端发送给基站的上行数据时，若中 继站已经成功接收移动终端发送的上行数据，则将中继站已经成功接收移动终 端发送的上行数据的响应确认信息发送给移动终端，使移动终端及时获知中继 站已经成功接收了移动终端发送给基站的上行数据，同时将非确认响应信息返 回给中继站， 由中继站执行后续的上行数据重传，避免了移动终端不必要的重 传， 由此减少了移动终端的重传次数， 进而减低了移动终端的功耗。 同时由于 移动终端重传次数的减少，也减少了由于移动终端的重传对于透明中继网络中 其他移动终端的数据传输造成的干扰。
请参考图 4， 为本发明实施例透明中继网络中的中继站的结构示意图， 所 述中继站包括侦听及解码单元 420、 判断单元 440、 接收单元 460及发送单元 480。
所述侦听及解码单元 420， 用于侦听移动终端向基站发送的上行数据并进 行解码。
具体的，移动终端会定期发送上行探测信号，对应所述移动终端的中继站 的接收单元 460接收所述上行探测信号以获得上行移动终端-中继站的链路信 道质量。 所述中继站的发送单元 480将获得的所述上行移动终端 -中继站的链 路信道质量上传至基站， 基站根据所述上行移动终端 -中继站的链路信道质量 执行上行调度， 为所述移动终端分配相应的信道资源、调制编码方式及合适的 功率大小等， 以尽量保证中继站可以成功解码所述移动终端发送的上行数据。 基站将上行调度结果通知移动终端，移动终端根据所述上行调度结果向基站发 送上行数据。
基站将上行调度结果通知移动终端时，中继站的侦听及解码单元 420会侦 听物理下行控制信道， 进而获取基站对移动终端的上行调度信息。所述侦听及 解码单元 420根据获取的基站对移动终端的上行调度信息，在相应的上行信道 资源上侦听移动终端向基站发送的上行数据并进行解码。
所述判断单元 440， 用于判断所述侦听及解码单元 420解码上行数据是否 成功。 当所述判断单元 440判断所述侦听及解码单元 420解码成功时，表示所 述侦听及解码单元 420已经成功接收移动终端向所述基站发送的上行数据。所 述侦听及解码单元 420还用于在所述判断单元 440判断解码成功时，对所述上 行数据进行緩存。
所述接收单元 460， 用于接收所述基站向所述中继站返回的非确认信息， 所述非确认信息表示所述基站未成功解码所述移动终端向所述基站发送的上 行数据。所述移动终端向所述基站发送上行数据， 所述基站接收移动终端发送 的上行数据并进行解码， 并判断解码是否成功， 如果判断解码未成功， 则向所 述中继站的接收单元 460发送非确认信息，所述非确认信息表示所述基站未成 功解码所述移动终端向所述基站发送的上行数据。 所述发送单元 480， 用于所述判断单元 440判断所述侦听及解码单元 420 解码成功时， 发送确认响应信息给基站， 通知基站中继站已经成功接收移动终 端发送给基站的上行数据，当基站未成功解码所述上行数据时将所述确认响应 信息发送给移动终端。这样可以使移动终端及时获知中继站已经成功接收了移 动终端发送给基站的上行数据， 避免了移动终端不必要的重传。
所述发送单元 480， 还用于在所述判断单元 440判断所述侦听及解码单元 420解码上行数据成功， 且所述接收单元 460接收到所述基站返回的非确认信 息时， 将所述侦听及解码单元 420侦听的上行数据发送至所述基站。
所述侦听及解码单元 420还用于若所述接收单元 460接收到所述基站返回 的响应确认信息，所述响应确认信息表示基站已经成功接收中继站重传的上行 数据， 则删除所述緩存的上行数据。
本发明实施例基站在未成功接收移动终端发送给基站的上行数据时，若中 继站已经成功接收移动终端发送的上行数据，则将中继站已经成功接收移动终 端发送的上行数据的响应确认信息发送给移动终端，使移动终端及时获知中继 站已经成功接收了移动终端发送给基站的上行数据，同时将非确认响应信息返 回给中继站， 由中继站执行后续的上行数据重传，避免了移动终端不必要的重 传， 由此减少了移动终端的重传次数， 进而减低了移动终端的功耗。 同时由于 移动终端重传次数的减少，也减少了由于移动终端的重传对于透明中继网络中 其他移动终端的数据传输造成的干扰。
请参考图 5， 为本发明实施例透明中继网络中的基站的结构示意图， 所述 基站包括接收及解码单元 520、判断单元 540及发送单元 560。可以理解的是， 所述基站还可以包括调度单元 580。 所述接收及解码单元 520， 用于收移动终端向基站发送的上行数据并进行 解码。
移动终端会定期发送上行探测信号，对应所述移动终端的中继站接收所述 上行探测信号以获得上行移动终端 -中继站的链路信道质量。 所述中继站将获 得的所述上行移动终端 -中继站的链路信道质量上传至基站的， 基站的调度单 元 580根据所述上行移动终端 -中继站的链路信道质量执行上行调度， 为所述 移动终端分配相应的信道资源、调制解码方式及合适的功率大小等， 以尽量保 证中继站可以成功解码所述移动终端发送的上行数据。基站将上行调度结果通 过发送单元 560通知移动终端，移动终端根据所述上行调度结果向基站发送上 行数据， 基站的接收及解码单元 520接收移动终端发送的上行数据并进行解 码。
所述判断单元 540， 用于判断所述接收及解码单元 520对上行数据解码是 否成功。 若解码成功， 则表示基站成功接收所述移动终端发送的上行数据； 若 解码未成功， 则表示基站未成功接收所述移动终端发送的上行数据。
所述发送单元 560，用于在所述判断单元 540判断所述接收及解码单元 520 对上行数据解码未成功时，将中继站发送的表示中继站已经成功接收移动终端 发送给基站的上行数据的确认响应消息发送给移动终端。这样可以使移动终端 及时获知中继站已经成功接收了移动终端发送给基站的上行数据，避免了移动 终端不必要的重传。
所述发送单元 560还用于在所述判断单元 540判断所述接收及解码单元
520对上行数据解码未成功时， 向中继站发送非确认信息， 所述非确认信息用 以中继站侦听所述上行数据并成功解码时，所述中继站根据所述非确认信息将 所述侦听的上行数据发送至所述基站。
基站接收移动终端向基站发送的上行数据并进行解码时，中继站会也会侦 听移动终端向基站发送的上行数据并进行解码。具体的，基站将上行调度结果 通知移动终端时， 中继站会侦听物理下行控制信道， 进而获取基站对移动终端 的上行调度信息。 中继站根据获取的基站对移动终端的上行调度信息， 在相应 的上行信道资源上侦听移动终端向基站发送的上行数据并进行解码。
当中继站判断解码成功时，即表示中继站已经成功接收到移动终端发送给 基站的上行数据， 若接收到基站的发送单元 560向中继站发送的非确认信息， 则中继站根据所述非确认信息将所述侦听的上行数据发送至所述基站。
本发明实施例基站在未成功接收移动终端发送给基站的上行数据时，若中 继站已经成功接收移动终端发送的上行数据，则将中继站已经成功接收移动终 端发送的上行数据的响应确认信息发送给移动终端，使移动终端及时获知中继 站已经成功接收了移动终端发送给基站的上行数据，同时将非确认响应信息返 回给中继站， 由中继站执行后续的上行数据重传，避免了移动终端不必要的重 传， 由此减少了移动终端的重传次数， 进而减低了移动终端的功耗。 同时由于 移动终端重传次数的减少，也减少了由于移动终端的重传对于透明中继网络中 其他移动终端的数据传输造成的干扰。
请参考图 6，为现有技术和本发明实施例中继站 -基站物理上行控制信道结 构及其资源映射示意图。现有技术 LTE系统中，采用物理上行控制信道 PUCCH 传输 ACK/NACK信息。根据 LTE协议规定，物理上行控制信道结构如图 6( a ) 所示， 1个物理上行控制信道对应着 1个子帧 （1ms ) 内 2个时隙上的两个资 源块， 例如图 6 ( a ) 中指示了 4个物理上行控制信道， 其中， 每个阴影部分 代表 1个物理资源块，标号相同的两个资源块则对应着同 1个物理上行控制信 道 PUCCH， 从图中可以看出， 现有 1个物理上行控制信道 PUCCH映射至系 统传输带宽高、 低两端的两个资源块上， 且分布在 1个子帧的两个时隙内 （即 在时间上占满 1个子帧）。
此外， LTE标准还规定上行混合自动重传请求（HARQ )采用同步方式， 即每次混合自动重传请求（ HARQ )重传的时域位置被限制在预定好的位置上。 具体的， 移动终端在上行传输 4ms后， 接收基站发送的响应信息。 为了有效 的保证现有规定的这种时序性，从而实现透明中继方案同现有 LTE Rel-8 移动 终端的后向兼容， 必须为基站处理中继站发送的响应消息 （ACK/NACK )预 留一定的时间 （至少 0.5ms )， 以保证基站能在处理完信令消息后在下一个子 帧发送时刻将中继站反馈的 ACK信息转发给移动终端。
如果继续按照现有 LTE协议， 中继站发送响应消息 （ACK/NACK )给基 站需要占用 1ms的时间， 不能给基站处理所述响应消息 （ACK/NACK )预留 足够的时间， 进而无法实现同 LTE协议的现有同步方式的混合自动重传请求 ( HARQ )兼容。
为了保证实际系统中硬件处理的可实现性，本发明实施例中继站在中继站 -基站物理上行控制信道 PUCCH上发送 ACK/NACK信息， 其 PUCCH信道限 制在 0.5ms (即 1个时隙）内发送完成，如图 6 ( b )所示，修改后， 1个 PUCCH 信道映射到 1个时隙内的系统传输带宽高、低两端的两个资源块上， 以保证中 继站在 0.5ms时间内向基站发送 ACK/NACK反馈，从而为 eNB解码并处理中 继站发送的响应消息 （ACK/NACK )预留出处理时间， 进而能够实现同步方 式的混合自动重传请求（HARQ )。 本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程， 是可以通过计算机程序来指令相关的硬件来完成，所述的程序可存储于计算机 可读取存储介质中， 该程序在执行时， 可包括如上述各方法的实施例的流程。 其中，所述的存储介质可为磁碟、光盘、只读存储记忆体（Read-Only Memory, ROM )或随机存储记忆体 ( Random Access Memory, RAM )等。
以上所述，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局 限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内， 可轻易 想到的变化或替换， 都应涵盖在本发明的保护范围之内。 因此， 本发明的保护 范围应该以权利要求的保护范围为准。

Claims

权 利 要 求
1、 一种透明中继网络中的上行混合自动重传请求方法， 包括：
中继站侦听移动终端向基站发送的上行数据并进行解码；
所述中继站判断解码上行数据是否成功；
当所述中继站判断解码上行数据成功时，所述中继站发送确认响应信息给 所述基站， 通知所述基站所述中继站已经成功接收所述上行数据， 当所述基站 未成功解码所述上行数据时将所述确认响应信息发送给所述移动终端；
当所述中继站判断解码上行数据成功，并接收到所述基站向所述中继站返 回的非确认信息时， 所述中继站将所述侦听的上行数据发送至所述基站， 所述 非确认信息表示所述基站未成功解码所述移动终端向所述基站发送的上行数 据。
2、 如权利要求 1所述的方法， 其特征在于， 所述方法还包括： 所述中继 站将获得的上行移动终端-中继站的链路信道质量上传至基站；
3、 如权利要求 1所述的方法， 其特征在于， 所述中继站侦听移动终端向 基站发送的上行数据并进行解码， 包括：
所述中继站侦听所述基站根据所述上行移动终端-中继站的链路信道质量 执行上行调度后发送的上行调度信息；
所述中继站根据所述上行调度信息，在相应的上行信道资源上侦听移动终 端向基站发送的上行数据并进行解码。
4、 如权利要求 1所述的方法， 其特征在于， 所述方法还包括： 所述中继 站在判断解码上行数据成功时， 对所述上行数据进行緩存。
5、 如权利要求 4所述的方法， 其特征在于： 所述中继站将所述侦听的上 行数据发送至所述基站后， 还包括： 若接收到所述基站返回的响应确认信息， 所述响应确认信息表示基站已经成功接收中继站重传的上行数据，则删除所述 緩存的上行数据。
6、 一种透明中继网络中的上行混合自动重传请求方法， 包括：
基站接收移动终端发送的上行数据并进行解码；
所述基站判断对所述上行数据进行解码是否成功；
若所述基站判断对所述上行数据进行解码未成功，所述基站将所述中继站 发送的表示中继站已经成功接收所述上行数据的确认响应消息发送给所述移 动终端；
若所述基站判断对所述上行数据进行解码未成功，所述基站还向所述中继 站发送非确认信息，所述非确认信息用以所述中继站侦听所述上行数据并成功 解码时，所述中继站根据所述非确认信息将所述侦听的上行数据发送至所述基 站。
7、 如权利要求 6所述的方法， 其特征在于， 所述方法还包括：
所述基站接收所述中继站发送的上行移动终端 -中继站的链路信道质量； 所述基站根据所述上行移动终端 -中继站的链路信道质量执行上行调度， 并将所述上行调度结果通知移动终端。
8、 一种透明中继网络中的中继站， 包括：
侦听及解码单元， 用于侦听移动终端向基站发送的上行数据并解码； 判断单元， 用于判断所述侦听及解码单元解码上行数据是否成功； 接收单元， 用于接收所述基站向所述中继站返回的非确认信息， 所述非确 认信息表示所述基站未成功解码所述移动终端向所述基站发送的上行数据； 发送单元，用于在所述判断单元判断所述侦听及解码单元解码成功时， 发 送确认响应信息给所述基站，通知所述基站所述中继站已经成功接收所述上行 数据，当所述基站未成功解码所述上行数据时将所述确认响应信息发送给所述 移动终端； 数据成功， 且所述接收单元接收到所述基站返回的非确认信息时，将所述侦听 及解码单元侦听的上行数据发送至所述基站。
9、 如权利要求 8所述的中继站， 其特征在于： 所述发送单元还用于将获 得的上行移动终端-中继站的链路信道质量上传至基站， 所述侦听及解码单元 还用于侦听所述基站根据所述上行移动终端 -中继站的链路信道质量执行上行 调度后发送的上行调度信息， 所述侦听及解码单元根据所述上行调度信息，在 相应的上行信道资源上侦听移动终端向基站发送的上行数据并进行解码。
10、 如权利要求 8所述的中继站， 其特征在于： 所述侦听及解码单元还用 于在所述判断单元判断解码成功时， 对所述上行数据进行緩存。
11、 如权利要求 10所述的中继站， 其特征在于： 所述侦听及解码单元还 用于若所述接收单元接收到所述基站返回的响应确认信息，所述响应确认信息 表示基站已经成功接收中继站重传的上行数据， 则删除所述緩存的上行数据。
12、 一种透明中继网络中的基站， 包括：
接收及解码单元， 用于收移动终端向基站发送的上行数据并进行解码； 判断单元， 用于判断所述接收及解码单元对上行数据解码是否成功； 发送单元，用于在所述判断单元判断所述接收及解码单元对上行数据解码 未成功时，将中继站发送的表示所述中继站已经成功接收移动终端发送给基站 的上行数据的确认响应消息发送给所述移动终端； 据解码未成功时， 向所述中继站发送非确认信息， 所述非确认信息用以中继站 侦听所述上行数据并成功解码时，所述中继站根据所述非确认信息将所述侦听 的上行数据发送至所述基站。
1 3、 如权利要求 12所述的中继站， 其特征在于： 还包括调度单元， 所述 调度单元根据所述中继站发送的上行移动终端 -中继站的链路信道质量执行上 行调度， 并将所述上行调度结果通过所述发送单元通知移动终端。
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