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WO2012019494A1 - Procédé et appareil de transmission de requête automatique de répétition hybride (harq, hybrid automatic repeat request) sur une liaison relais dans un système de duplexage par répartition dans le temps - Google Patents

Procédé et appareil de transmission de requête automatique de répétition hybride (harq, hybrid automatic repeat request) sur une liaison relais dans un système de duplexage par répartition dans le temps Download PDF

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Publication number
WO2012019494A1
WO2012019494A1 PCT/CN2011/076441 CN2011076441W WO2012019494A1 WO 2012019494 A1 WO2012019494 A1 WO 2012019494A1 CN 2011076441 W CN2011076441 W CN 2011076441W WO 2012019494 A1 WO2012019494 A1 WO 2012019494A1
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WO
WIPO (PCT)
Prior art keywords
relay
downlink
uplink
subframe
transmission
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/CN2011/076441
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English (en)
Chinese (zh)
Inventor
吴栓栓
毕峰
袁弋非
杨瑾
袁明
梁枫
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.)
ZTE Corp
Original Assignee
ZTE Corp
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 ZTE Corp filed Critical ZTE Corp
Publication of WO2012019494A1 publication Critical patent/WO2012019494A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/26—Cell enhancers or enhancement, e.g. for tunnels, building shadow

Definitions

  • the present invention relates to the field of mobile communications, and in particular, to a HARQ (Hybrid-Automatic Repeat Request) transmission method and apparatus for a relay link of a time division duplex system.
  • HARQ Hybrid-Automatic Repeat Request
  • LTE Long Term Evolution
  • each radio frame has a length of 10 milliseconds, and each radio frame includes 10 subframes having a length of 1 millisecond, including an uplink subframe, a downlink subframe, and a special subframe.
  • the LTE TDD Release-8 (Rel-8) system defines a total of 7 seed frame configurations.
  • the ratio of the uplink and downlink subframes in each configuration structure is different.
  • the system can be based on the cell.
  • the uplink and downlink traffic is flexibly configured.
  • the specific seven configurations are shown in Table 1, where D is the downlink subframe, U is the uplink subframe, and S is the special subframe.
  • the structure of the S subframe is shown in Figure 2.
  • the TDD LTE-A system maintains the same frame structure as TDD LTE. It is currently determined that in LTE-A TDD Release-10 (Rel-10), the subframe uplink and downlink configurations 0 and 5 shown in Table 1 do not support relay transmission.
  • the uplink HARQ transmission defines a series of transmission timings, including: uplink data transmission and downlink acknowledgement or non-acknowledgement (ACK/NACK) information feedback timing; downlink ACK/NACK feedback and Uplink data retransmission timing, etc.
  • ACK/NACK non-acknowledgement
  • the data transmission is one more hop, that is, the original base station-terminal communication mode changes.
  • the communication mode of the terminal receiving the relay station service becomes the base station-relay station-terminal mode.
  • the corresponding interface is also referred to as the Un interface
  • a part of the subframes are allocated for the communication of the base station-relay station, and these sub-frames
  • a frame is called a relay subframe (or an Un subframe).
  • the relay station For the downlink relay subframe, the relay station indicates that it is an MBSFN subframe to the next Rel-8 terminal, and the Rel-8 terminal does not receive the resources outside the control domain of the MBSFN subframe, thereby ensuring that the relay station performs downlink reception. When it comes to compatibility with Rel-8 terminals.
  • the uplink service of the relay station subordinate terminal is not scheduled, and the relay station uplink transmission is avoided, and the relay station subordinate terminal is also transmitting uplink.
  • the relay subframe needs to be properly configured and the HARQ transmission timing of the relay link is defined. .
  • the main object of the present invention is to provide a relay link of a time division duplex system.
  • the HARQ transmission method and device are used to implement reasonable setting of the HARQ timing of the relay link, and ensure backward compatibility with the terminal.
  • a relay link HARQ transmission method for a TDD system comprising:
  • the method is directed to the uplink and downlink configuration 1 of the subframe in the TDD system, and the HARQ timing relationship of the relay transmission is:
  • the method is directed to the uplink and downlink configuration 2 of the subframe in the TDD system, and the HARQ timing relationship of the relay transmission is:
  • the method is directed to the uplink and downlink configuration 3 of the subframe in the TDD system, and the HARQ timing relationship of the relay transmission is:
  • the method is directed to the uplink and downlink configuration 4 of the subframe in the TDD system, and the HARQ timing relationship of the relay transmission is:
  • the method is directed to the uplink and downlink configuration of the subframe in the TDD system, and the HARQ timing relationship of the relay transmission is:
  • the downlink feedback of the uplink data of the relay link is carried by a new data indication (NDI) and/or a relay link HARQ indicator channel (R-PHICH) in an uplink grant (UL grant).
  • NDI new data indication
  • R-PHICH relay link HARQ indicator channel
  • the present invention also provides a relay link HARQ transmission apparatus for a time division duplex system, the apparatus comprising:
  • the HARQ timing determining module is configured to determine a HARQ timing relationship of the relay transmission according to the positions of the uplink relay subframe and the downlink relay subframe in the uplink and downlink configuration of the subframe supporting the relay transmission in the TDD system;
  • a HARQ transmission module configured to perform HARQ transmission according to the HARQ timing relationship of the relay transmission determined by the HARQ timing determination module.
  • the HARQ timing relationship determined by the HARQ timing determination module is:
  • the HARQ timing relationship determined by the HARQ timing determination module is specifically:
  • the HARQ transmission module carries the downlink feedback information by using an NDI and/or an R-PHICH channel in the UL grant when performing downlink feedback of the uplink data of the relay link.
  • the reliability of the relay link data transmission is effectively ensured; the efficiency of the HARQ transmission is ensured; meanwhile, the method of the present invention avoids the impact on the HARQ timing of the relay station subordinate terminal, and ensures the To compatibility.
  • 1 is a schematic diagram of a radio frame structure of an LTE system
  • FIG. 2 is a schematic diagram of a special subframe structure of a TDD LTE system
  • FIG. 3 is a schematic diagram of a configuration of a relay subframe of an uplink and downlink configuration 1 of a TDD system subframe;
  • FIG. 4 is a schematic diagram of a configuration of a relay subframe of an uplink and downlink configuration 2 of a TDD system subframe;
  • FIG. 5 is a schematic diagram of a configuration of a relay subframe of an uplink and downlink configuration 3 of a TDD system subframe;
  • FIG. 6 is a schematic diagram of a configuration of a relay subframe of an uplink and downlink configuration 4 of a TDD system subframe;
  • FIG. 7 is a schematic diagram of a configuration of a relay subframe of an uplink and downlink configuration 6 of a TDD system subframe;
  • FIG. 8 is a schematic flowchart of a HARQ transmission method of a relay link of a TDD system according to the present invention
  • FIG. 9 is a structural diagram of a HARQ transmission apparatus of a relay link of a time division duplex system according to the present invention.
  • the basic idea of the present invention is that the HARQ timing relationship of the relay transmission is determined according to the uplink and downlink configuration of the subframe supported by the TDD system and the configuration of the relay link subframe in the uplink and downlink configuration of the subframe, and the relay is configured.
  • the link subframe configuration determines the uplink relay subframe and the downlink relay subframe of the relay transmission.
  • the invention can effectively ensure the reliability of the data transmission of the relay link and ensure the efficiency of the HARQ transmission; at the same time, the invention can also avoid the influence on the data transmission of the terminal of the relay station and ensure the backward compatibility with the terminal.
  • the transmission timing of service data transmission and corresponding ACK/NACK feedback information needs to meet the processing delay. That is, after the receiving end receives the service data, it needs sufficient processing time to perform demodulation, decoding, and CRC (Cyclic Redundant Check) to determine whether ACK or NACK information should be fed back to the transmitting end.
  • CRC Cyclic Redundant Check
  • the feedback delay is at least 4 ms, that is, after the subframe n receives the data, the subframe is generally fed with a subframe that satisfies n+4 or more. Therefore, the HARQ timing of the relay link also needs to follow this principle.
  • the definition of HARQ timing should consider the delay of feedback, that is, the interval between service data transmission and corresponding feedback information transmission should not be too large, which may cause the delay of service transmission to increase, which in turn leads to the transmission of the following terminals of the relay station. The delay is increased.
  • FIG. 8 is a flowchart of a method for relaying HARQ transmission of a relay link of a time division duplex system according to the present invention, which specifically includes the following steps:
  • Step 1 For the uplink and downlink configuration of the subframe supporting the relay transmission in the TDD system, determining the HARQ timing relationship of the relay transmission according to the positions of the uplink relay subframe and the downlink relay subframe in the uplink and downlink configuration of the subframe;
  • the present invention first determines the location that can be used as the uplink and downlink relay subframe according to the uplink and downlink configuration of the subframe in the TDD LTE/LTE-A system, as shown in Table 1. Since it is currently determined that the uplink and downlink configurations 0 and 5 of the sub-frames in Rel-10 do not support relay transmission, the embodiments of the present invention are only described for the remaining configurations. In addition, in the Rel-10 TDD Relay, subframes 0, 1, 5, and 6 are not configured as relay subframes.
  • the description of the feedback and retransmission timing in the configuration of the uplink and downlink configuration 1, 2, 3, 4, and 6 of the subframe is as follows.
  • Step 2 Perform HARQ transmission according to the HARQ timing relationship of the relay transmission.
  • the method of the present invention will be specifically described below according to the subframe uplink and downlink configuration in the TDD LTE/LTE-A system in Table 1.
  • the downlink subframes 4 and 9 can be configured as downlink relay subframes due to the limitation of the MBSFN subframe configuration. If subframes 4 and 9 are configured as downlink relay subframes, subframes 8 and 3 can be configured as uplink relay subframes, and this configuration mode has the least influence on the HARQ timing relationship of the relay station subordinate terminals.
  • the configuration of the relay subframe is shown in Figure 3. It should be emphasized that the relay subframe configuration shown in FIG. 3 is only a preferred configuration to illustrate the relay link HARQ timing problem described in the present invention, and is not the only relay subframe in the uplink and downlink configuration of the subframe. Configuration method.
  • the downlink ACK/NACK feedback information can only be in the downlink relay subframe 9 or in the next radio frame.
  • the downlink relay subframe 4 is transmitted. Otherwise, the downlink feedback information of the relay link cannot be correctly received. However, if the downlink relay subframe 4 transmission of the next radio frame will cause the feedback delay to be too large, it is preferable to feed back the downlink relay subframe 9 of the current radio frame.
  • the downlink feedback can also be transmitted in the relay subframe 4 or 9 of the next radio frame.
  • the feedback delay it is preferably transmitted in the uplink relay subframe 4 of the next radio frame.
  • Another HARQ timing relationship related to uplink transmission is a timing relationship between downlink feedback information transmission and uplink retransmission.
  • the downlink subframes 3, 4, 8, and 9 can be configured as downlink relay subframes. If subframe 3 or 3 and subframe 9 of the previous radio frame are configured as downlink relay subframes, subframe 7 can be configured as an uplink relay subframe, and the effect of this configuration manner on the HARQ timing relationship of the subordinate terminals of the relay station is affected. Similarly, if subframe 8 or subframes 8 and 4 are configured as downlink relay subframes, subframe 2 of the next radio frame may be configured as an uplink relay subframe, in which case the relay subframe configuration is for the relay station. The HARQ timing relationship of the subordinate terminals is less affected.
  • the sub-frames 4 and 8 are configured as downlink relay sub-frames, and the sub-frame 2 is configured as an uplink relay sub-frame as an example to illustrate the method of the present invention, as shown in FIG. It should be emphasized that the relay subframe configuration shown in FIG. 4 is only a preferred configuration to illustrate the relay link HARQ timing problem described in the present invention, and is not the only relay subframe in the uplink and downlink configuration of the subframe. Configuration method.
  • the downlink ACK/NACK feedback information can only be in the downlink relay subframe 8 or in the next radio frame.
  • the downlink relay subframe 4 is transmitted. Otherwise, the downlink feedback information of the relay link cannot be correctly received. However, if the transmission at 4 will cause the feedback delay to be too large, it is preferable to feedback at 8.
  • subframes 3 or 3 and 9 are configured as downlink relay subframes, and subframe 7 is configured as uplink relay subframes, HARQ timing can be similarly obtained.
  • Another HARQ timing relationship related to uplink transmission is a timing relationship between downlink feedback information transmission and uplink retransmission.
  • the downlink subframes 7, 8, and 9 can be configured as downlink relay subframes. If subframes 7, 8 and 9 are configured as downlink relay subframes, subframes 2 and 3 can be configured as uplink relay subframes, and this configuration mode has the least influence on the HARQ timing relationship of the relay station subordinate terminals. Assume that the relay subframe configuration is as shown in Figure 5. It should be emphasized that the relay subframe configuration shown in FIG. 5 is only a preferred configuration to illustrate the relay link HARQ timing problem described in the present invention, and is not the only relay subframe in the uplink and downlink configuration of the subframe. Configuration method.
  • the downlink ACK/NACK feedback information can only be transmitted in the downlink relay subframe 8 or 9. Otherwise, the downlink feedback information of the relay link cannot be received correctly.
  • the downlink feedback information of the uplink service in the subframes 2 and 3 may be transmitted in the subframe 8 or the subframe 9, or may be transmitted in the subframes 8 and 9, respectively.
  • the feedback information of the uplink services of the subframes 2 and 3 is separately transmitted in different subframes, for example, the downlink feedback information of the uplink transmission of the subframe 2 is transmitted in the subframe 8, and the feedback information of the uplink service of the subframe 3 is transmitted in the subframe 9. .
  • Another HARQ timing relationship related to uplink transmission is a timing relationship between downlink feedback information transmission and uplink retransmission.
  • the downlink subframes 4, 7, 8, and 9 may be configured as downlink relay subframes, and the subframes 2 and 3 may be configured as uplink relay subframes.
  • the relay subframe configuration is as shown in Figure 6. It should be emphasized that the relay subframe configuration shown in FIG. 6 is only a preferred configuration to illustrate the relay link HARQ timing problem described in the present invention, and is not the only relay subframe in the uplink and downlink configuration of the subframe. Configuration method.
  • the downlink ACK/NACK feedback information can only be transmitted in the downlink relay subframe 7 or 9, otherwise The downlink feedback information of the relay link cannot be received correctly.
  • the downlink feedback information of the uplink transmission of the limited subframe 3 is transmitted in the subframe 9. If subframes 2 and 8 are also configured as relay subframes, the downlink ACK/NACK feedback information of the uplink transmission of subframe 2 can be limited to be transmitted in subframe 8.
  • Another HARQ timing relationship related to uplink transmission is a timing relationship between downlink feedback information transmission and uplink retransmission.
  • the downlink subframe 9 can be configured as a downlink relay subframe. If 9 is configured as a downlink relay subframe, subframe 4 can be configured as an uplink relay subframe.
  • This configuration mode has less influence on the HARQ timing relationship of the relay terminal.
  • the relay subframe configuration is as shown in FIG. 7. It should be emphasized that the relay subframe configuration shown in FIG. 7 is only a preferred configuration to illustrate the relay link HARQ timing problem described in the present invention, and is not the only relay subframe in the uplink and downlink configuration of the subframe. Configuration method.
  • the downlink ACK/NACK feedback information can only be transmitted in the downlink relay subframe 9, otherwise it will result in The downlink feedback information of the link cannot be received correctly.
  • Link uplink data, receiving corresponding downlink feedback in the downlink relay subframe n+i, where i 5.
  • Another HARQ timing relationship related to uplink transmission is a timing relationship between downlink feedback information transmission and uplink retransmission.
  • the timing relationship of the uplink retransmission is defined as n+5
  • the downlink ACK/NACK feedback information of the relay link can be indicated by NDI (New Data Indication) in the relay link uplink grant (UL grant).
  • NDI New Data Indication
  • the NDI in the UL grant is 1 bit, and may take values of 0 and 1.
  • the NDI in the UL grant is 2 bits, each 1 bit corresponds to 1 codeword stream, and can take 0 and 1 values. If the NDI is used for indication, the NDI does not directly indicate the ACK or NACK information, but indicates whether the 1 codeword stream scheduled for uplink is a retransmission or a first transmission by 1 bit.
  • the retransmission is scheduled, it means the last transmission error (NACK), otherwise it means the last transmission is correct (ACK).
  • NACK last transmission error
  • ACK ACK
  • Specific NDI It is the same as the NDI in the UL grant sent to the terminal, and will not be described here.
  • the downlink feedback of the relay link may also be sent through the HARQ indication of the relay link,
  • the HARQ indication is normally carried on the relay link HARQ indicator channel (Relay-Physical)
  • the PHICH channel of the relay link can be used in the same manner as the PHICH transmitted to the terminal, and is not described here.
  • FIG. 9 is a structural diagram of a relay link HARQ transmission apparatus for a time division duplex system according to the present invention.
  • the apparatus is used to implement a relay link HARQ transmission method of a time division duplex system according to the present invention, and the apparatus includes: HARQ timing determination module, HARQ transmission module;
  • the HARQ timing determining module is configured to determine a HARQ timing relationship of the relay transmission according to the positions of the uplink relay subframe and the downlink relay subframe in the uplink and downlink configuration of the subframe supporting the relay transmission in the TDD system;
  • the HARQ timing determining module determines the HARQ timing relationship of the relay transmission according to the location of the uplink relay subframe and the downlink relay subframe and the requirements of the feedback delay and the retransmission delay in the LTE system; the specific HARQ of the relay transmission For the timing relationship, see the previous descriptions of the uplink and downlink configurations 1, 2, 3, 4, and 6 of the subframe, and details are not described here.
  • the HARQ transmission module is configured to perform HARQ transmission according to the HARQ timing relationship of the relay transmission determined by the HARQ timing determination module.
  • the HARQ transmission module carries the downlink feedback information by using an NDI and/or an R-PHICH channel in the UL grant when performing downlink feedback of the uplink data of the relay link.
  • the relay link HARQ transmission method and apparatus described in the present invention effectively ensure the reliability of the relay link data transmission, ensure the efficiency of the HARQ transmission, and avoid the influence on the HARQ timing of the relay terminal subordinate terminal. , to ensure backward compatibility for the terminal.

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

Abstract

La présente invention se rapporte à un procédé et à un appareil de transmission de requête automatique de répétition hybride (HARQ, Hybrid Automatic Repeat Request) sur une liaison relais dans un système de duplexage par répartition dans le temps (TDD). Le procédé et l'appareil selon l'invention sont utilisés pour accomplir le paramétrage raisonnable d'une séquence temporelle HARQ sur une liaison relais. Selon la solution technique de la présente invention : en ce qui concerne la configuration liaison montante/liaison descendante d'une sous-trame prenant en charge une transmission de relais dans le système TDD, en fonction des positions de sous-trames de relais sur la liaison montante et de sous-trames de relais sur la liaison descendante dans la configuration liaison montante/liaison descendante d'une sous-trame, une relation de séquence temporelle HARQ de la transmission via relais est déterminée. Avec la présente invention, la fiabilité de la transmission de données sur la liaison relais et l'efficacité de la transmission d'une requête HARQ sont garanties avec une grande efficacité. Dans le même temps, selon la présente invention, l'impact sur la séquence temporelle HARQ d'un terminal, qui est subordonnée à une station relais, est évité et la rétrocompatibilité avec le terminal est assurée.
PCT/CN2011/076441 2010-08-13 2011-06-27 Procédé et appareil de transmission de requête automatique de répétition hybride (harq, hybrid automatic repeat request) sur une liaison relais dans un système de duplexage par répartition dans le temps Ceased WO2012019494A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201010255846.1 2010-08-13
CN201010255846.1A CN102377550B (zh) 2010-08-13 2010-08-13 一种时分双工系统的中继链路harq传输方法及装置

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WO2012019494A1 true WO2012019494A1 (fr) 2012-02-16

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CN102420682B (zh) * 2010-09-28 2016-04-13 中兴通讯股份有限公司 中继链路下行反馈信息传输时序确定方法及装置
CN107689848B (zh) * 2016-08-05 2021-11-30 中兴通讯股份有限公司 信息指示方法及装置、系统

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CN101741452A (zh) * 2008-11-07 2010-06-16 华为技术有限公司 中继传输方法和网络节点

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