WO2012059031A1 - Switching method for subframe configurations in relay link - Google Patents

Switching method for subframe configurations in relay link Download PDF

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Publication number
WO2012059031A1
WO2012059031A1 PCT/CN2011/081562 CN2011081562W WO2012059031A1 WO 2012059031 A1 WO2012059031 A1 WO 2012059031A1 CN 2011081562 W CN2011081562 W CN 2011081562W WO 2012059031 A1 WO2012059031 A1 WO 2012059031A1
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WIPO (PCT)
Prior art keywords
handover
subframe
subframe configuration
hybrid automatic
automatic repeat
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PCT/CN2011/081562
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French (fr)
Chinese (zh)
Inventor
毕峰
杨瑾
梁枫
袁明
吴栓栓
袁弋非
Original Assignee
中兴通讯股份有限公司
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Publication of WO2012059031A1 publication Critical patent/WO2012059031A1/en

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    • 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
    • H04L1/1822—Automatic repetition systems, e.g. Van Duuren systems involving configuration of automatic repeat request [ARQ] with parallel processes
    • 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
    • H04L1/1854—Scheduling and prioritising arrangements
    • 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
    • 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

Definitions

  • the present invention relates to a third-generation partnership project (3GPP) Long Term Evolution (LTE) system, and a long-term evolution (LTE-A, Long Term Evolution Advanced) system for relay node transceiving anti-interference technology, especially A method involving subframe configuration switching in a relay link.
  • 3GPP third-generation partnership project
  • LTE-A Long Term Evolution Advanced
  • a new link is added after the introduction of a relay node (RN, Relay Node) in the LTE-A system.
  • the method includes: a link between a base station (eNode-B) and a relay node (RN). It is called a relay link or a backhaul link.
  • the link between the RN and the user equipment (UE, User Equipment) is called an access link, and the eNode-B and the UE are The link between them is called the direct link.
  • the case where the eNode-B to RN link and the RN to UE link operate on the same frequency resource (subcarrier) is called inband-relay.
  • the link between the eNode-B and the RN and the RN are It is not possible for the UE's link to be on the same frequency resource at the same time unless there is sufficient signal separation and antenna isolation. Similarly, it is also impossible for the RN to transmit data to the eNode-B while receiving data from the UE.
  • the current solution for the RN transceiving interference problem is to prevent the RN from transmitting data to the UE when receiving data from the eNode-B. That is, after the RN switches to the UE link, it is necessary to increase the gap time, so that the UE does not perform any receiving or transmitting operation within the gap time range; and the RN completes the transmission-to-receive switching within the gap time range.
  • the data from the eNode-B is then received at subsequent Orthogonal Frequency Division Multiplexing (OFDM) symbols.
  • the gap time is increased by configuring a Multicast Broadcast Single Frequency Network (MBSFN) to be used as a backhaul subframe.
  • MBSFN Multicast Broadcast Single Frequency Network
  • the Multimedia Control Entity (MCE, MBMS Control Entity) first configures the available MBSFN subframes for the eNode-B, and the eNode-B configures the available backhaul subframes in these available MBSFN subframes.
  • MCE Multimedia Control Entity
  • a 10 ms radio frame is composed of 10 1 ms subframes, and each subframe is composed of multiple OFDM symbols, as shown in FIG. 2, which can be used for unicast. (Unicast) and Multicast Broadcast.
  • FDD frequency division duplex
  • #0, #5 subframes are used as the transmission synchronization signal
  • #4, #9 subframes are used as paging.
  • TDD Time Division Duplex
  • #0, #5 subframes are used as transmission synchronization signals
  • #1, #6 subframes are used as paging.
  • the ⁇ #0, #4, #5, #9 ⁇ sub-frames in FDD mode and the ⁇ #0, #1, #5, #6 ⁇ sub-frames in TDD mode have the above special uses and cannot be used.
  • the configuration of the MBSFN subframe that is, the MBSFN subframe configurable in one radio frame is at most 6 subframes.
  • the data transmission between the user equipment (UE) and the base station (eNode-B) needs to establish a hybrid automatic repeat request (HARQ) process and perform corresponding information feedback.
  • the base station After receiving the data of the user equipment, the base station generates downlink feedback information (refer to acknowledgment/non-acknowledgement signal ACK/NACK) or uplink grant information (UL grant, mainly including new data indication NDI: New Data Indicator, modulation coding scheme) according to the decoding situation.
  • the MCS Modulation and Coding Scheme
  • resources, and the RA Resource Allocation information, etc.
  • the above content indicates that the FDD ⁇ #0, #4, #5, #9 ⁇ downlink subframe cannot be used in the relay link, and the corresponding FDD ⁇ #4, #8, #9, #3 ⁇ uplink subframe cannot be used.
  • the uplink subframe number differs by "4"), that is, FDD ⁇ #0, #4, #5, #9 ⁇ downlink subframes and ⁇ #4, #8, #9, #3 ⁇ Uplink subframes cannot be used for subframe configuration.
  • the design of the uplink HARQ mainly includes the combination of the lower and the uplink subframes using only an integer multiple of 8 ms or 8 ms. It is assumed that the subframe configuration is required to be completed within 40 ms, and the use of the FDD downlink subframes ⁇ #0, #4, #5, #9 ⁇ and the uplink subframes ⁇ #4, #8, # 9, #3 ⁇ , then the 8 sets of downlink subframes include ⁇ (#7 #23 #31), (#6 #22 #38), (#13 #21 #37), (#12 #28 #36) , (#3 #11 #27), (#2 #18 #26), (#1 #17 #33), (#8 #16 #32) ⁇ , the corresponding uplink subframe 8 sets include ⁇ (# 11 #27 #35), (#10 #26 #42), (#17 #25 #41), (#16 #32 #40), (#7 #15 #31), (#6 #22 #30), (#5 #21 #37), (#12 #
  • one downlink subframe set corresponds to one uplink subframe set, that is, from the whole uplink subframe set, a total of eight lower uplink subframe sets are shown, and the set index thereof is as shown in Table 1. Since the different sets are combined, a total of 2 combinations of 8 squares, that is, a total of 256 combinations are included.
  • the subframe configuration can be performed in an 8-bit bitmap manner, that is, the 8-bit binary numbers using the set index respectively correspond to the subframe set combinations represented by the different set indexes.
  • the binary number of the set index "7" is "00000111", which corresponds to the set of three subframes represented by the set index "2", T, "0";...;”
  • the binary represented is "10101010”, which corresponds to the set index of "7", "5", "3", “ ⁇ , the four seed frame sets represented by the combination.
  • the receiver only gets the configured set index.
  • the corresponding downlink and uplink subframe configurations are obtained.
  • the number of HARQ processes (0-6) corresponding to the combination of the above 256 types of uplink subframes is shown in Table 2, where the "combination configuration" (hereinafter also referred to as subframe configuration) in the first column is represented by a decimal number.
  • the "combination number" in Table 2 For each different set index in Table 1, the number of set indexes in each column combination configuration is the "combination number" in Table 2; “the number of sets” represents the set of subframes represented by the number of combined indexes. Number, may be one or more; “subframe number” indicates the number of subframes in each subframe set.
  • the present invention provides a method for switching a subframe configuration in a relay link, including:
  • the network side determines the subframe configuration after the handover according to the number of uplink hybrid automatic repeat request processes configured before the handover subframe configuration and/or the switched subframe configuration.
  • the step of determining the subframe configuration after the handover according to the number of uplink hybrid automatic repeat request processes configured before the handover subframe configuration and/or the handover subframe configuration includes:
  • the number of the uplink hybrid automatic repeat request process configured in the subframe before the handover is greater than the number of the uplink hybrid automatic repeat request process configured in the subframe after the handover, the number of the uplink hybrid automatic repeat request processes corresponding to the configured subframe after the handover is performed.
  • a combination configuration of the subset of the binary subframes before the handover is performed, and the subframe configuration after the handover is determined; or, the subframe configuration before the handover is determined as the subframe configuration after the handover.
  • the step of determining the subframe configuration after the handover according to the number of uplink hybrid automatic repeat request processes configured before the handover subframe configuration and/or the handover subframe configuration includes:
  • the number of the uplink hybrid automatic repeat request process configured in the subframe before the handover is smaller than the number of the uplink hybrid automatic repeat request process configured in the subframe after the handover, the number of the uplink hybrid automatic repeat request process corresponding to the configured subframe after the handover is performed.
  • the combined configuration of the binary subframe configuration before the handover is performed to determine the subframe configuration after the handover; or the subframe configuration before the handover is determined as the subframe configuration after the handover.
  • the step of determining the subframe configuration after the handover according to the number of uplink hybrid automatic repeat request processes configured before the handover subframe configuration and/or the handover subframe configuration includes:
  • the uplink hybrid automatic repeat request process number determines the subframe configuration after the handover according to any combination configuration corresponding to the uplink hybrid automatic repeat request process number.
  • the method further includes: if the uplink hybrid automatic repeat request process configured in the pre-switching subframe does not complete the transmission correctly, if the number of processes k of the uplink hybrid automatic repeat request process that is not correctly completed is greater than the configured subframe configuration after the handover
  • the uplink hybrid automatic retransmission request process number n, the network side and/or the receiving end discards or suspends (kn) the uplink hybrid automatic repeat request process; according to the pre-switch subframe configuration and/or the switched subframe configuration
  • the step of determining the subframe configuration after the handover is performed by the number of the uplink hybrid automatic repeat request process includes: determining, by the network side, any combination configuration corresponding to the number of uplink hybrid automatic repeat request processes configured in the subframe after the handover is determined as the subframe after the handover Configuration.
  • the step of determining the subframe configuration after the handover according to the number of uplink hybrid automatic repeat request processes configured before the handover subframe configuration and/or the handover subframe configuration further includes:
  • the network side selects any one of the subframe configurations of the number of uplink hybrid automatic repeat request processes with the configured subframe configuration as the switched subframe configuration.
  • the step of determining the subframe configuration after the handover according to the number of uplink hybrid automatic repeat request processes configured before the handover subframe configuration and/or the handover subframe configuration includes: The uplink hybrid automatic repeat request process configured in the subframe configuration before the handover is not correct When the transmission is completed, and the number of uplink hybrid automatic repeat request processes configured in the subframe before the handover is greater than the number of uplink hybrid automatic repeat request processes configured in the subframe after the handover, if the subframe configuration before the handover is not correctly completed, If the number of the uplink hybrid automatic repeat request process k is less than or equal to n, the network side determines the subframe configuration after the handover according to the combined configuration corresponding to n and belongs to the subset of the pre-switching binary subframe configuration; if k is greater than n, Then, the network side and/or the receiving side discards or suspends (kn) the uplink hybrid automatic repeat request process, and determines the switched sub-subsequence according to the subframe configuration corresponding to
  • the step of determining the subframe configuration after the handover according to the number of uplink hybrid automatic repeat request processes configured before the handover subframe configuration and/or the handover subframe configuration includes: The uplink hybrid automatic repeat request process configured in the subframe configuration before the handover is not correct When the transmission is completed, and the number of uplink hybrid automatic repeat request processes configured in the subframe before the handover is less than or equal to the number of uplink hybrid automatic repeat request processes configured in the subframe after the handover, if the subframe configuration before the handover is not configured, When the number k of the uplink hybrid automatic repeat request process that correctly completes the transmission is less than or equal to n, the network side determines the subframe configuration after the handover according to the subframe configuration corresponding to n and including the configuration of the pre-switching binary subframe. The uplink hybrid automatic repeat request process configured before the handover is not correctly completed.
  • the transmission refers to one or more of the following situations:
  • the downlink acknowledgement information corresponding to the uplink data has not been received in the uplink hybrid automatic repeat request process configured in the subframe before the handover;
  • the number of uplink hybrid automatic repeat request processes configured in the subframe after the handover is configured to meet the requirement that the average delay of the uplink hybrid automatic repeat request process configured in the subframe after the handover is less than a predetermined delay threshold; according to the configuration and/or configuration before the handover.
  • the step of determining the subframe configuration after the handover is performed by the number of the uplink hybrid automatic repeat request process configured by the subframe after the handover includes: determining, by the network side, the combination configuration corresponding to the number of uplink hybrid automatic repeat request processes configured in the subframe after the handover Sub-frame configuration after switching.
  • the number of uplink hybrid automatic repeat request processes configured in the subframe after the handover meets the requirement of the same period length of the uplink hybrid automatic repeat request process configured before and after the handover; according to the configuration of the subframe before the handover and/or after the handover
  • the number of uplink hybrid automatic repeat request processes configured by the frame determines the subframe configuration after the handover includes: the network side determines the switched subframe according to the combined configuration of the number of uplink hybrid automatic repeat request processes configured in the subframe after the handover Frame configuration.
  • the step of determining the subframe configuration after the handover according to the number of uplink hybrid automatic repeat request processes configured before the handover subframe configuration and/or the handover subframe configuration includes:
  • the network side determines the subframe configuration after the handover according to the subframe configuration corresponding to the cyclic shift of the subframe configuration before the handover.
  • the method for configuring the subframe configuration handover of the relay link provided by the present invention can be well applied to the relay link of the base station to the relay node, and does not need to introduce signaling overhead, thereby ensuring backward direction.
  • Compatibility (compatible with LTE systems) also solves the problem of serious HARQ transmission mismatch during the subframe configuration switching of the relay link.
  • FIG. 1 is a schematic structural diagram of adding a link after introducing a relay node in an LTE-A system
  • FIG. 2 is a schematic structural diagram of a radio frame
  • FIG. 3 is a schematic diagram of a method for implementing subframe configuration switching in a relay link according to an embodiment in which an uplink HARQ repetition period is 40 ms before and after a subframe configuration handover;
  • FIG. 4 is a schematic diagram of splitting 6 processes in 40 ms of the uplink HARQ repetition period in FIG. 3.
  • Preferred embodiment of the invention
  • the network side determines the subframe configuration after the handover according to the number of uplink HARQ processes configured before the handover and/or the subframe after the handover.
  • the number of uplink HARQ processes configured in the subframe after the handover is configured to meet the requirement that the average delay of the uplink HARQ process configured in the subframe configuration before the handover and the subframe configuration after the handover is less than the predetermined delay threshold, and the network side according to the handover subframe that meets the requirement.
  • the configured number of uplink HARQ processes determines the subframe configuration after switching.
  • the number of the uplink HARQ processes configured in the subframe after the handover is the same as the requirement of the uplink HARQ process in the subframe configuration before and after the handover, and the network side determines the switched subframe according to the number of uplink HARQ processes configured in the switched subframe that meets the requirement.
  • the network side determines the subframe configuration after the handover according to the subframe configuration corresponding to the cyclic shift of the subframe configuration before the handover.
  • SFN indicates the system frame number (System Frame Number);
  • the DL subframe index is a sub-frame index of the downlink, and represents an index of 10 sub-frames included in one radio frame (frame), and the range is (#0, #1, #2, #3, #4). , #5, #6, #7, #8, #9 );
  • the UL subframe index is an uplink index, which indicates an index of 10 subframes included in one frame, and the range is (#0, #1, #2, #3, #4, #5, #6, #7, #8, #9 ).
  • Embodiment 1 The network side determines the subframe configuration of the specific handover according to the number of uplink HARQ processes configured in the subframe configuration before the handover and the subframe configuration after the handover, and includes the following six application examples.
  • the number of uplink HARQ processes configured in the subframe before the handover is greater than the number of uplink HARQ processes configured in the subframe after the handover, the number of uplink HARQ processes corresponding to the configuration of the subframe after the handover and the combination configuration of the subset of the binary subframes before the handover are configured. As a sub-frame configuration after switching.
  • the number of subsets corresponding to the combination configuration "15 ( 00001111 ) " of the pre-switching subframe is 2 to the 4th power, which is equal to 16, indicating that there are 16 subframe configurations in total.
  • the combined configuration of the binary combination configuration subsets belonging to "15” is correspondingly divided into four, respectively "7 ( 00000111 ) “ , “ 11 ( 00001011 ) “ , “ 13 ( 00001101 ) “ and “14 ( 00001110 ) " , then the switched subframe configuration can be selected in these four combined configurations.
  • the subframe configuration after the handover may also select the subframe configuration itself formed by the subframe set corresponding to the previous subframe configuration, that is, the combination configuration "15".
  • the method of the present invention can make the uplink HARQ process after the handover match the uplink HARQ process before the handover, so as to continue the transmission of the uplink HARQ process before the handover, by using the method of configuring the pre-switching subframe configuration itself or the subset.
  • the combination of the number of uplink HARQ processes corresponding to the subframe configuration after the handover and the configuration of the binary subframe configuration before the handover is used as the handover. Subframe configuration.
  • the combined configuration "230 ( 11100110 ) " corresponds to the 3rd power of the number 2, and equal to 8, indicating that there are a total of 8 included subframe configurations. It can be seen from Table 2 that according to the number of uplink HARQ processes is 6, a total of five combined configurations including the "230" binary combination configuration can be obtained correspondingly (that is, the binary number "11100110” can be changed except for three “0”s. "1” cannot be changed), respectively, “231 ( 11100111 ),, “239 ( 11101111 ), , “247 ( 11110111 ), , “254 ( 11111110 ) " , "255 ( 11111111 ) " ) The sub-frame configuration can be selected in these five combined configurations.
  • the subframe configuration after the handover may also select the subframe configuration itself formed by the subframe combination corresponding to the combined configuration of the previous subframes, that is, the combination configuration "230".
  • the subframe configuration after the handover may be any subframe configuration corresponding to the number of the HARQ processes being n.
  • the present invention can make the uplink HARQ process after the handover match the uplink HARQ process before the handover, and continue the uplink HARQ process before the handover, by using the subframe configuration before the handover or the subframe configuration including the configuration of the pre-switch subframe. Transmission.
  • the network side and/or the receiving end discard or suspend if the uplink HARQ process configured in the previous subframe is not correctly completed.
  • (kn) an uplink HARQ process and the network side determines any combination configuration corresponding to the number of uplink HARQ processes configured in the subframe after handover as the subframe configuration after handover; if k is less than or equal to n, the network side will have handover Any one of the subframe configurations corresponding to the number of uplink HARQ processes configured in the subsequent subframe is selected as the subframe configuration after the handover.
  • the network side determines the subframe configuration after the handover according to the combined configuration corresponding to n and belongs to the subset of the configuration of the binary subframes before the handover; if k is greater than n Then, the network side and/or the receiving side discards or suspends (kn) uplink HARQ processes, and the network side determines the sub-switching according to the subframe configuration corresponding to n and belongs to the subset of the pre-switching binary subframe configuration. Frame configuration.
  • the network side determines the subframe configuration after the handover according to the subframe configuration corresponding to n and including the configuration of the pre-switching binary subframe.
  • the uplink HARQ process configured in the pre-switching subframe has not been correctly completed. Specifically, the last retransmission in the uplink HARQ process configured before the handover is not correctly transmitted, or the uplink configuration is configured before the handover.
  • the downlink acknowledgement information corresponding to the uplink data has not been received in the HARQ process, or the last retransmission has not been correctly transmitted after the maximum number of retransmissions is reached in the uplink HARQ process configured in the subframe before the handover.
  • the uplink HARQ process after the handover can be matched with the uplink HARQ process before the handover, so that the transmission of the uplink HARQ process before the handover is continued.
  • the network side determines the subframe configuration after the handover according to the combination configuration corresponding to the number of uplink HARQ processes configured in the subframe after the handover of the uplink HARQ process that meets the requirements of the uplink HARQ process.
  • the number of uplink HARQ processes configured in the subframe after the handover is 3, and the average delay requirement of the uplink HARQ process is less than the delay threshold (13.33 ms).
  • the delay threshold 13.33 ms.
  • a total of 48 256 subframe configurations satisfy the condition.
  • the subframe configuration in which the number of uplink HARQ processes is 3 is two, which are respectively "85” and "170", and the subframe configuration after switching is selected in the two subframe configurations.
  • the subframe configuration switching in the relay link is implemented by using the above-mentioned delay requirement that satisfies the uplink HARQ process, and is actually still a handover mode that satisfies the HARQ process number requirement.
  • the network side determines the subframe configuration after the handover according to the subframe configuration corresponding to the number of uplink HARQ processes configured by the switched subframes having the same uplink HARQ process period configured in the subframe configuration before and after the handover.
  • the length of the uplink HARQ process repetition period configured in the subframe after handover is also 40 ms, or the system specifies a repetition period length of 40 ms.
  • the subframe configuration that satisfies this condition is common.
  • the number of uplink HARQ processes is 6 and there are 9 subframe configurations, respectively, "63", "126", "159”, “207", “231”, “243”, “249”, “252” And "255”, then the switched subframe configuration is selected in the 9 subframe configurations.
  • the subframe configuration that satisfies the above conditions is: the subframe configuration corresponding to the uplink HARQ process repetition period configured in the subframe after handover and the uplink HARQ process repetition period configured in the pre-switch subframe configuration; or the uplink configuration configured with the pre-switch subframe configuration
  • the HARQ process repeats the subframe configuration corresponding to the repetition period specified after the handover.
  • the subframe configuration switch in the relay link is implemented by using the above-mentioned requirements for satisfying the uplink HARQ process repetition period length, and is actually still a handover mode that satisfies the HARQ process number requirement.
  • the network side determines the subframe configuration after the handover according to the subframe configuration corresponding to the cyclic shift of the subframe configuration before the handover.
  • the corresponding subframe combination signaling is decimal "5" (ie, binary "00000101"), and the corresponding binary is cyclically shifted to the left or right.
  • the subframe configuration has a total of 7 subframe configurations, and the corresponding subframe configurations are respectively "10".
  • the sub-frame set consists of the sub-frame configuration itself, ie the sub-frame configuration "5".
  • the manner of cyclic shifting configured by the above-mentioned pre-switching subframe configuration is mainly to satisfy the shift requirement of the subframe configuration in some cases.
  • the present invention can be well applied to a relay link of a base station to a relay node, and does not need to introduce signaling overhead, which not only ensures backward compatibility (compatible with LTE system), but also solves A serious HARQ transmission mismatch occurs during the subframe configuration switching of the relay link.

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Abstract

The present invention provides a switching method for subframe configurations in a relay link, which comprises: a network side determining subframe configurations after switching according to the number of uplink hybrid automatic repeat request processes of subframe configurations before switching and/or subframe configurations after switching. The method is desirably applicable to a relay link from a base station to a relay node without introducing signaling overhead, which ensures backward compatibility and also solves the problem of severe unmatched HARQ transmission during the switching of subframe configurations of a relay link.

Description

一种中继链路中子帧配置切换的方法  Method for switching subframe configuration in relay link
技术领域 Technical field
本发明涉及系第三代合作伙伴计划（ 3GPP )的长期演进（ LTE, Long Term Evolution ) ***、 高级的长期演进 ( LTE-A, Long Term Evolution Advanced ) ***的中继节点收发抗干扰技术，尤其涉及中继链路中子帧配置切换的方法。  The present invention relates to a third-generation partnership project (3GPP) Long Term Evolution (LTE) system, and a long-term evolution (LTE-A, Long Term Evolution Advanced) system for relay node transceiving anti-interference technology, especially A method involving subframe configuration switching in a relay link.
背景技术 Background technique
LTE-A***中引入中继节点 （ RN , Relay Node )之后增加了新的链路 , 如图 1所示， 包括： 基站（eNode-B )与中继节点 （RN )之间的链路， 称为 中继链路或回程链路（ backhaul link ), RN与用户设备 ( UE, User Equipment ) 之间的链路，称为接入链路 ( access link ), 以及， eNode-B与 UE之间的链路， 称为直传链路 ( direct link )。 eNode-B到 RN的链路和 RN到 UE的链路运作 在相同的频率资源 （子载波）上的情形被称为带内中继 （ inband-relay )。  A new link is added after the introduction of a relay node (RN, Relay Node) in the LTE-A system. As shown in FIG. 1, the method includes: a link between a base station (eNode-B) and a relay node (RN). It is called a relay link or a backhaul link. The link between the RN and the user equipment (UE, User Equipment) is called an access link, and the eNode-B and the UE are The link between them is called the direct link. The case where the eNode-B to RN link and the RN to UE link operate on the same frequency resource (subcarrier) is called inband-relay.
在釆用带内中继时， 由于 RN的发射机（向 UE发射数据 )会对 RN的接 收机 (从 eNode-B接收数据）产生自干扰， 因此 eNode-B到 RN的链路和 RN 到 UE的链路同时处在相同的频率资源上是不可能的， 除非有足够的信号分 离和天线隔离度。 类似地， RN也不可能在从 UE接收数据的同时向 eNode-B 发射数据。  When using in-band relay, since the transmitter of the RN (transmitting data to the UE) generates self-interference to the receiver of the RN (receiving data from the eNode-B), the link between the eNode-B and the RN and the RN are It is not possible for the UE's link to be on the same frequency resource at the same time unless there is sufficient signal separation and antenna isolation. Similarly, it is also impossible for the RN to transmit data to the eNode-B while receiving data from the UE.
目前所用的 RN 收发干扰问题的解决方法， 是使得 RN在接收来自 eNode-B的数据时， 不进行向 UE发射数据的操作。 也就是说， 在 RN切换到 UE链路后需要增加空隙 （gap ) 时间， 使得 UE在该 gap时间范围内不进行 任何接收或发射操作； 而 RN在该 gap时间范围内完成发射到接收的切换， 然后在后面的正交频分复用（OFDM )符号接收来自 eNode-B的数据。 该 gap 时间通过配置多播广播单频网络 ( MBSFN , Multicast Broadcast Single Frequency Network )子顿 ( subframe )用作回程子†j¾ ( backhaul subframe )来 增加， 在 LTE***中具体釆用的方式是： 由多媒体控制实体（MCE, MBMS Control Entity )首先为 eNode-B配置可用的 MBSFN subframe, 再由 eNode-B 在这些可用的 MBSFN subframe中配置可用的 backhaul subframe。 依照目前 LTE***中的规定， 1个 10ms无线帧（ frame )由 10个 1ms的 子帧 （subframe )构成， 每一子帧又由多个 OFDM符号构成， 如图 2所示， 可用于单播（ Unicast )和多播广播（ Multicast Broadcast )。 其中， 在频分双工 ( FDD , Frequency Division Duplex )方式时， #0、 #5子帧用作发射同步信号， 而 #4、 #9子帧用作寻呼（paging )。 在时分双工（TDD, Time Division Duplex ) 方式时， #0、 #5子帧用作发射同步信号， 而 #1、 #6子帧用作寻呼。 也就是说， 对于 FDD模式下 {#0、 #4、 #5、 #9}子帧和 TDD模式下 {#0、 #1、 #5、 #6}子 帧有上述特殊用途， 不能用于 MBSFN subframe的配置， 即在 1个无线帧里 可配置的 MBSFN subframe最多为 6个子帧。 The current solution for the RN transceiving interference problem is to prevent the RN from transmitting data to the UE when receiving data from the eNode-B. That is, after the RN switches to the UE link, it is necessary to increase the gap time, so that the UE does not perform any receiving or transmitting operation within the gap time range; and the RN completes the transmission-to-receive switching within the gap time range. The data from the eNode-B is then received at subsequent Orthogonal Frequency Division Multiplexing (OFDM) symbols. The gap time is increased by configuring a Multicast Broadcast Single Frequency Network (MBSFN) to be used as a backhaul subframe. The specific method used in the LTE system is: The Multimedia Control Entity (MCE, MBMS Control Entity) first configures the available MBSFN subframes for the eNode-B, and the eNode-B configures the available backhaul subframes in these available MBSFN subframes. According to the current LTE system, a 10 ms radio frame is composed of 10 1 ms subframes, and each subframe is composed of multiple OFDM symbols, as shown in FIG. 2, which can be used for unicast. (Unicast) and Multicast Broadcast. Among them, in the frequency division duplex (FDD) mode, #0, #5 subframes are used as the transmission synchronization signal, and #4, #9 subframes are used as paging. In the Time Division Duplex (TDD) mode, #0, #5 subframes are used as transmission synchronization signals, and #1, #6 subframes are used as paging. In other words, the {#0, #4, #5, #9} sub-frames in FDD mode and the {#0, #1, #5, #6} sub-frames in TDD mode have the above special uses and cannot be used. The configuration of the MBSFN subframe, that is, the MBSFN subframe configurable in one radio frame is at most 6 subframes.
在 LTE***中， 用户设备 ( UE )和基站（eNode-B )之间对于数据的传 输需要建立混合自动重传请求（HARQ, Hybrid Automatic Repeat Request )进 程， 并进行相应的信息反馈。 当基站接收到用户设备的数据后， 根据解码情 况生成下行反馈信息（指确认 /非确认信号 ACK/NACK )或上行授权信息（ UL grant, 主要包括新数据指示 NDI: New Data Indicator, 调制编码方案 MCS: Modulation and Coding Scheme、 资源、分西己 RA: Resource Allocation等信息、 ), 并将生成的信息下行发送给用户设备。 用户设备根据接收到的信息进行下一 步处理， 若收到 ACK或 NDI有效（ NDI=1有效， 或 NDI=0有效）信息， 则 继续传输新的数据； 若收到 NACK或 NDI无效 ( NDI=0无效， 或 NDI=1无 效）信息， 则将在相同的 HARQ进程上把数据重新发送给基站。  In the LTE system, the data transmission between the user equipment (UE) and the base station (eNode-B) needs to establish a hybrid automatic repeat request (HARQ) process and perform corresponding information feedback. After receiving the data of the user equipment, the base station generates downlink feedback information (refer to acknowledgment/non-acknowledgement signal ACK/NACK) or uplink grant information (UL grant, mainly including new data indication NDI: New Data Indicator, modulation coding scheme) according to the decoding situation. The MCS: Modulation and Coding Scheme, resources, and the RA: Resource Allocation information, etc., and the generated information is sent downstream to the user equipment. The user equipment performs the next processing according to the received information. If the ACK or NDI is valid (NDI=1 is valid, or NDI=0 is valid), the new data is continuously transmitted; if the NACK is received or the NDI is invalid (NDI= If 0 is invalid, or NDI=1 is invalid, the information will be resent to the base station on the same HARQ process.
上述内容说明， 中继链路不能使用 FDD {#0、 #4、 #5、 #9}下行子帧， 相 应的也不能使用 FDD{#4、 #8、 #9、 #3}上行子帧 （注： 此处下、 上行子帧号 相差 "4" ), 亦即 FDD{#0、 #4、 #5、 #9}下行子帧和 {#4、 #8、 #9、 #3}上行子 帧不能用于子帧配置。  The above content indicates that the FDD {#0, #4, #5, #9} downlink subframe cannot be used in the relay link, and the corresponding FDD{#4, #8, #9, #3} uplink subframe cannot be used. (Note: Here, the uplink subframe number differs by "4"), that is, FDD{#0, #4, #5, #9} downlink subframes and {#4, #8, #9, #3} Uplink subframes cannot be used for subframe configuration.
目前对于上行 HARQ的设计， 主要包括仅使用 8ms或 8ms整数倍的下、 上行子帧组合。假设要求在 40ms范围内完成子帧配置，且考虑到中继链路避 开使用 FDD下行子帧 {#0、 #4、 #5、 #9}和上行子帧 {#4、 #8、 #9、 #3} , 则下 行子帧 8个集合包括 {(#7 #23 #31), (#6 #22 #38), (#13 #21 #37), (#12 #28 #36)、 (#3 #11 #27)、 （#2 #18 #26)、 （#1 #17 #33)、 （#8 #16 #32)} , 对应的上行子帧 8 个集合包括 {(#11 #27 #35)、 （#10 #26 #42)、 （#17 #25 #41)、 （#16 #32 #40)、 (#7 #15 #31)、 （#6 #22 #30)、 （#5 #21 #37)、 (#12 #20 #36)} ; 其中大于 "40" 的子 帧在计算过程中可以对 "40" 求模运算（运算符为 "mod" ), 例如 mod ( 42, 40 ) =2。 At present, the design of the uplink HARQ mainly includes the combination of the lower and the uplink subframes using only an integer multiple of 8 ms or 8 ms. It is assumed that the subframe configuration is required to be completed within 40 ms, and the use of the FDD downlink subframes {#0, #4, #5, #9} and the uplink subframes {#4, #8, # 9, #3}, then the 8 sets of downlink subframes include {(#7 #23 #31), (#6 #22 #38), (#13 #21 #37), (#12 #28 #36) , (#3 #11 #27), (#2 #18 #26), (#1 #17 #33), (#8 #16 #32)}, the corresponding uplink subframe 8 sets include {(# 11 #27 #35), (#10 #26 #42), (#17 #25 #41), (#16 #32 #40), (#7 #15 #31), (#6 #22 #30), (#5 #21 #37), (#12 #20 #36)} ; where the sub-frame larger than "40" can be "40" during the calculation "The modulo operation (operator is "mod"), for example mod ( 42, 40 ) = 2.
实际上， 由于 1个下行子帧集合对应着 1个上行子帧集合， 也就说从下 上行子帧集合整体来看， 共 8个下上行子帧集合， 其集合索引如表 1所示。 由于不同的集合组合在一起的情况共包括 2的 8次方种组合， 即共 256种组 合。  In fact, since one downlink subframe set corresponds to one uplink subframe set, that is, from the whole uplink subframe set, a total of eight lower uplink subframe sets are shown, and the set index thereof is as shown in Table 1. Since the different sets are combined, a total of 2 combinations of 8 squares, that is, a total of 256 combinations are included.
表 1  Table 1
Figure imgf000005_0001
子帧配置可通过 8比特的 bitmap方式进行，即使用集合索引的 8bits的二 进制数分别对应不同的集合索引所代表的子帧集合组合。譬如，集合索引 "7" 的二进制数为 "00000111" , 对应着集合索引 "2"、 T、 "0" 所代表的三种 子帧集合组合在一起; ... ...； 集合索引 "170" 表示的二进制为 "10101010" , 对应着集合索引为 " 7"、 "5"、 "3"、 "Γ，所代表的四种子帧集合组合在一起。 接收端只要获取了被配置的集合索引也就获取了相应的下行及上行子帧配 置。
Figure imgf000005_0001
The subframe configuration can be performed in an 8-bit bitmap manner, that is, the 8-bit binary numbers using the set index respectively correspond to the subframe set combinations represented by the different set indexes. For example, the binary number of the set index "7" is "00000111", which corresponds to the set of three subframes represented by the set index "2", T, "0";...;"The binary represented is "10101010", which corresponds to the set index of "7", "5", "3", "Γ, the four seed frame sets represented by the combination. The receiver only gets the configured set index. In addition, the corresponding downlink and uplink subframe configurations are obtained.
上述 256种下上行子帧集合组合情况对应的 HARQ进程数 ( 0-6 )如表 2 所示， 其中第 1列中的 "组合配置" （下文中也称为子帧配置）使用十进制数 表示表 1 中的各个不同的集合索引， 每一栏组合配置中集合索引的个数便是 表 2中的 "组合数"； "集合个数" 表示由组合索引个数所代表的子帧集合的 个数，可能是一种或二种以上； "子帧数"表示每一个子帧集合中子帧的数目 表 2 The number of HARQ processes (0-6) corresponding to the combination of the above 256 types of uplink subframes is shown in Table 2, where the "combination configuration" (hereinafter also referred to as subframe configuration) in the first column is represented by a decimal number. For each different set index in Table 1, the number of set indexes in each column combination configuration is the "combination number" in Table 2; "the number of sets" represents the set of subframes represented by the number of combined indexes. Number, may be one or more; "subframe number" indicates the number of subframes in each subframe set. Table 2
Figure imgf000006_0001
根据表 2中的 "子帧数"和 "HARQ进程数" 可以计算出 eNode-B与 UE 之间的上行直传链路中数据重传（HARQ )次数 =子帧数 / HARQ进程数； 由 此， 根据上行 HARQ进程周期长度可获知上行 HARQ进程的平均时延。 譬 如假设上行 HARQ进程周期长度为 40ms, 子帧数为 6, 且 HARQ进程数为 2 的 HARQ次数 =6/2=3 , 则上行 HARQ进程的平均时延等于 40/3=13.33ms。 由表 2可看出， 下上行子帧集合不同的组合对应不同的上行 HARQ进程 数。 在因 RN进行发射 /接收切换而发生的子帧配置切换时， 上行 HARQ进程 数可能会由此发生变化， 由此会导致子帧配置切换前后 HARQ传输不匹配。 因此， 为了避免子帧配置切换前后出现严重的 HARQ传输不匹配的情况， 需 要提供一种中继链路中子帧配置切换的方法。 发明内容
Figure imgf000006_0001
According to the "number of subframes" and "number of HARQ processes" in Table 2, the number of data retransmissions (HARQ) in the uplink direct transmission link between the eNode-B and the UE = the number of subframes / the number of HARQ processes can be calculated; Therefore, the average delay of the uplink HARQ process can be known according to the length of the uplink HARQ process period. For example, if the uplink HARQ process period length is 40 ms, the number of subframes is 6, and the number of HARQ processes is 2, the HARQ times are 6/2=3, and the average delay of the uplink HARQ process is equal to 40/3=13.33 ms. It can be seen from Table 2 that different combinations of the lower uplink subframe sets correspond to different uplink HARQ processes. When the subframe configuration switching occurs due to the RN performing the transmission/reception switching, the number of uplink HARQ processes may change accordingly, thereby causing the HARQ transmission mismatch before and after the subframe configuration switching. Therefore, in order to avoid a serious HARQ transmission mismatch before and after the subframe configuration switching, it is required to provide a method for subframe configuration switching in the relay link. Summary of the invention
本发明的目的是提供一种中继链路中子帧配置切换的方法， 以避免子帧 配置切换前后出现严重的 HARQ传输不匹配。  It is an object of the present invention to provide a method for subframe configuration switching in a relay link to avoid serious HARQ transmission mismatch before and after subframe configuration switching.
为了解决上述技术问题， 本发明提供了一种中继链路中子帧配置切换的 方法， 包括：  In order to solve the above technical problem, the present invention provides a method for switching a subframe configuration in a relay link, including:
网络侧根据切换前子帧配置和 /或切换后子帧配置的上行混合自动重传 请求进程数， 确定切换后的子帧配置。  The network side determines the subframe configuration after the handover according to the number of uplink hybrid automatic repeat request processes configured before the handover subframe configuration and/or the switched subframe configuration.
根据切换前子帧配置和 /或切换后子帧配置的上行混合自动重传请求进 程数确定切换后的子帧配置的步骤包括：  The step of determining the subframe configuration after the handover according to the number of uplink hybrid automatic repeat request processes configured before the handover subframe configuration and/or the handover subframe configuration includes:
若切换前子帧配置的上行混合自动重传请求进程数大于切换后子帧配置 的上行混合自动重传请求进程数， 则根据对应于切换后子帧配置的上行混合 自动重传请求进程数且属于切换前二进制子帧配置子集的组合配置， 确定切 换后的子帧配置； 或者， 将切换前子帧配置确定为切换后的子帧配置。  If the number of the uplink hybrid automatic repeat request process configured in the subframe before the handover is greater than the number of the uplink hybrid automatic repeat request process configured in the subframe after the handover, the number of the uplink hybrid automatic repeat request processes corresponding to the configured subframe after the handover is performed. A combination configuration of the subset of the binary subframes before the handover is performed, and the subframe configuration after the handover is determined; or, the subframe configuration before the handover is determined as the subframe configuration after the handover.
根据切换前子帧配置和 /或切换后子帧配置的上行混合自动重传请求进 程数确定切换后的子帧配置的步骤包括：  The step of determining the subframe configuration after the handover according to the number of uplink hybrid automatic repeat request processes configured before the handover subframe configuration and/or the handover subframe configuration includes:
若切换前子帧配置的上行混合自动重传请求进程数小于切换后子帧配置 的上行混合自动重传请求进程数， 则根据对应于切换后子帧配置的上行混合 自动重传请求进程数且包含切换前二进制子帧配置的组合配置， 确定切换后 的子帧配置； 或者， 将切换前子帧配置确定为切换后的子帧配置。  If the number of the uplink hybrid automatic repeat request process configured in the subframe before the handover is smaller than the number of the uplink hybrid automatic repeat request process configured in the subframe after the handover, the number of the uplink hybrid automatic repeat request process corresponding to the configured subframe after the handover is performed. The combined configuration of the binary subframe configuration before the handover is performed to determine the subframe configuration after the handover; or the subframe configuration before the handover is determined as the subframe configuration after the handover.
根据切换前子帧配置和 /或切换后子帧配置的上行混合自动重传请求进 程数确定切换后的子帧配置的步骤包括：  The step of determining the subframe configuration after the handover according to the number of uplink hybrid automatic repeat request processes configured before the handover subframe configuration and/or the handover subframe configuration includes:
若切换前子帧配置的上行混合自动重传请求进程数等于切换后子帧配置 的上行混合自动重传请求进程数， 则根据该上行混合自动重传请求进程数所 对应的任何一个组合配置， 确定切换后的子帧配置。 If the number of uplink hybrid automatic repeat request processes configured before the handover is equal to the subframe configuration after handover The uplink hybrid automatic repeat request process number determines the subframe configuration after the handover according to any combination configuration corresponding to the uplink hybrid automatic repeat request process number.
该方法还包括： 在切换前子帧配置的上行混合自动重传请求进程没有正 确完成传输的情况下， 若没有正确完成传输的上行混合自动重传请求进程的 进程数 k大于切换后子帧配置的上行混合自动重传请求进程数 n, 则网络侧 和 /或接收端丟弃或者挂起（ k-n )个上行混合自动重传请求进程； 根据切换前 子帧配置和 /或切换后子帧配置的上行混合自动重传请求进程数确定切换后 的子帧配置的步骤包括： 网络侧将切换后子帧配置的上行混合自动重传请求 进程数对应的任何一个组合配置确定为切换后的子帧配置。  The method further includes: if the uplink hybrid automatic repeat request process configured in the pre-switching subframe does not complete the transmission correctly, if the number of processes k of the uplink hybrid automatic repeat request process that is not correctly completed is greater than the configured subframe configuration after the handover The uplink hybrid automatic retransmission request process number n, the network side and/or the receiving end discards or suspends (kn) the uplink hybrid automatic repeat request process; according to the pre-switch subframe configuration and/or the switched subframe configuration The step of determining the subframe configuration after the handover is performed by the number of the uplink hybrid automatic repeat request process includes: determining, by the network side, any combination configuration corresponding to the number of uplink hybrid automatic repeat request processes configured in the subframe after the handover is determined as the subframe after the handover Configuration.
根据切换前子帧配置和 /或切换后子帧配置的上行混合自动重传请求进 程数确定切换后的子帧配置的步骤还包括：  The step of determining the subframe configuration after the handover according to the number of uplink hybrid automatic repeat request processes configured before the handover subframe configuration and/or the handover subframe configuration further includes:
若 k小于或等于 n, 则网络侧将具有切换后子帧配置的上行混合自动重 传请求进程数的任何一个子帧配置选为切换后子帧配置。  If k is less than or equal to n, the network side selects any one of the subframe configurations of the number of uplink hybrid automatic repeat request processes with the configured subframe configuration as the switched subframe configuration.
根据切换前子帧配置和 /或切换后子帧配置的上行混合自动重传请求进 程数确定切换后的子帧配置的步骤包括： 在切换前子帧配置的上行混合自动 重传请求进程没有正确完成传输的情况下， 且当切换前子帧配置的上行混合 自动重传请求进程数 m大于切换后子帧配置的上行混合自动重传请求进程数 n时，若切换前子帧配置没有正确完成传输的上行混合自动重传请求进程数 k 小于或等于 n,则网络侧根据对应于 n且属于切换前二进制子帧配置子集的组 合配置， 确定切换后的子帧配置； 若 k大于 n, 则网络侧和 /或接收侧丟弃或 挂起（k-n )个上行混合自动重传请求进程， 并且根据对应于 n且属于切换前 二进制子帧配置子集的子帧配置， 确定切换后的子帧配置。  The step of determining the subframe configuration after the handover according to the number of uplink hybrid automatic repeat request processes configured before the handover subframe configuration and/or the handover subframe configuration includes: The uplink hybrid automatic repeat request process configured in the subframe configuration before the handover is not correct When the transmission is completed, and the number of uplink hybrid automatic repeat request processes configured in the subframe before the handover is greater than the number of uplink hybrid automatic repeat request processes configured in the subframe after the handover, if the subframe configuration before the handover is not correctly completed, If the number of the uplink hybrid automatic repeat request process k is less than or equal to n, the network side determines the subframe configuration after the handover according to the combined configuration corresponding to n and belongs to the subset of the pre-switching binary subframe configuration; if k is greater than n, Then, the network side and/or the receiving side discards or suspends (kn) the uplink hybrid automatic repeat request process, and determines the switched sub-subsequence according to the subframe configuration corresponding to n and belongs to the pre-switching binary sub-frame configuration subset. Frame configuration.
根据切换前子帧配置和 /或切换后子帧配置的上行混合自动重传请求进 程数确定切换后的子帧配置的步骤包括： 在切换前子帧配置的上行混合自动 重传请求进程没有正确完成传输的情况下， 且当切换前子帧配置的上行混合 自动重传请求进程数 m小于或等于切换后子帧配置的上行混合自动重传请求 进程数 n时， 若切换前子帧配置没有正确完成传输的上行混合自动重传请求 进程数 k小于或等于 n时， 则网络侧根据对应于 n且包含切换前二进制子帧 配置的子帧配置， 确定切换后的子帧配置。 切换前子帧配置的上行混合自动重传请求进程没有正确完成传输是指以 下情况中的一种或多种： The step of determining the subframe configuration after the handover according to the number of uplink hybrid automatic repeat request processes configured before the handover subframe configuration and/or the handover subframe configuration includes: The uplink hybrid automatic repeat request process configured in the subframe configuration before the handover is not correct When the transmission is completed, and the number of uplink hybrid automatic repeat request processes configured in the subframe before the handover is less than or equal to the number of uplink hybrid automatic repeat request processes configured in the subframe after the handover, if the subframe configuration before the handover is not configured, When the number k of the uplink hybrid automatic repeat request process that correctly completes the transmission is less than or equal to n, the network side determines the subframe configuration after the handover according to the subframe configuration corresponding to n and including the configuration of the pre-switching binary subframe. The uplink hybrid automatic repeat request process configured before the handover is not correctly completed. The transmission refers to one or more of the following situations:
在切换前子帧配置的上行混合自动重传请求进程中最后一次重传还没有 正确传输；  The last retransmission in the uplink hybrid automatic repeat request process configured before the handover is not correctly transmitted;
在切换前子帧配置的上行混合自动重传请求进程中还没有收到上行数据 对应的下行确认信息； 以及  The downlink acknowledgement information corresponding to the uplink data has not been received in the uplink hybrid automatic repeat request process configured in the subframe before the handover;
在切换前子帧配置的上行混合自动重传请求进程中到达最大重传次数 后， 最后一次重传还没有正确传输。  After the maximum number of retransmissions is reached in the upstream hybrid automatic repeat request process configured in the pre-switch subframe, the last retransmission has not been correctly transmitted.
切换后子帧配置的上行混合自动重传请求进程数满足切换后子帧配置的 上行混合自动重传请求进程的平均时延小于预定的时延门限的要求； 根据切 换前子帧配置和 /或切换后子帧配置的上行混合自动重传请求进程数确定切 换后的子帧配置的步骤包括： 网络侧根据该切换后子帧配置的上行混合自动 重传请求进程数所对应的组合配置， 确定切换后的子帧配置。  The number of uplink hybrid automatic repeat request processes configured in the subframe after the handover is configured to meet the requirement that the average delay of the uplink hybrid automatic repeat request process configured in the subframe after the handover is less than a predetermined delay threshold; according to the configuration and/or configuration before the handover. The step of determining the subframe configuration after the handover is performed by the number of the uplink hybrid automatic repeat request process configured by the subframe after the handover includes: determining, by the network side, the combination configuration corresponding to the number of uplink hybrid automatic repeat request processes configured in the subframe after the handover Sub-frame configuration after switching.
切换后子帧配置的上行混合自动重传请求进程数满足切换前及切换后子 帧配置的上行混合自动重传请求进程的周期长度相同的要求； 根据切换前子 帧配置和 /或切换后子帧配置的上行混合自动重传请求进程数确定切换后的 子帧配置的步骤包括： 网络侧根据切换后子帧配置的上行混合自动重传请求 进程数所对应的组合配置， 确定切换后的子帧配置。  The number of uplink hybrid automatic repeat request processes configured in the subframe after the handover meets the requirement of the same period length of the uplink hybrid automatic repeat request process configured before and after the handover; according to the configuration of the subframe before the handover and/or after the handover The number of uplink hybrid automatic repeat request processes configured by the frame determines the subframe configuration after the handover includes: the network side determines the switched subframe according to the combined configuration of the number of uplink hybrid automatic repeat request processes configured in the subframe after the handover Frame configuration.
根据切换前子帧配置和 /或切换后子帧配置的上行混合自动重传请求进 程数确定切换后的子帧配置的步骤包括：  The step of determining the subframe configuration after the handover according to the number of uplink hybrid automatic repeat request processes configured before the handover subframe configuration and/or the handover subframe configuration includes:
网络侧根据切换前子帧配置的循环移位所对应的子帧配置， 确定切换后 的子帧配置。  The network side determines the subframe configuration after the handover according to the subframe configuration corresponding to the cyclic shift of the subframe configuration before the handover.
综上， 釆用本发明提供的中继链路的子帧配置切换的方法， 能够很好地 适用于基站到中继节点的中继链路， 且无需引入信令开销， 既保证了后向兼 容性（兼容 LTE***） ， 也解决了在进行中继链路的子帧配置切换过程中出 现严重的 HARQ传输不匹配的问题。 附图概述 In summary, the method for configuring the subframe configuration handover of the relay link provided by the present invention can be well applied to the relay link of the base station to the relay node, and does not need to introduce signaling overhead, thereby ensuring backward direction. Compatibility (compatible with LTE systems) also solves the problem of serious HARQ transmission mismatch during the subframe configuration switching of the relay link. BRIEF abstract
图 1 为 LTE-A***中引入中继节点后增加链路的结构示意图；  FIG. 1 is a schematic structural diagram of adding a link after introducing a relay node in an LTE-A system;
图 2 为无线帧的结构示意图；  2 is a schematic structural diagram of a radio frame;
图 3 为本发明的以子帧配置切换前后上行 HARQ重复周期均为 40ms为 实施例实现中继链路中子帧配置切换的方法的示意图；  FIG. 3 is a schematic diagram of a method for implementing subframe configuration switching in a relay link according to an embodiment in which an uplink HARQ repetition period is 40 ms before and after a subframe configuration handover;
图 4为对图 3中上行 HARQ重复周期 40ms内 6个进程的拆分示意图。 本发明的较佳实施方式  FIG. 4 is a schematic diagram of splitting 6 processes in 40 ms of the uplink HARQ repetition period in FIG. 3. Preferred embodiment of the invention
下面结合附图和优选实施例来详细地说明本发明的技术方案。 以下例举 的实施例仅用于说明和解释本发明， 而不构成对本发明技术方案的限制。 在 以下是以 HARQ进程的重复周期为 40ms为例， 来说明本发明的中继链 路中子帧配置切换的方法。  The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments. The following examples are intended to illustrate and explain the present invention and are not intended to limit the invention. In the following, the method of switching the subframe configuration in the relay link of the present invention will be described by taking the repetition period of the HARQ process as 40 ms as an example.
本发明的中继链路中子帧配置切换的方法实施例， 包括：  The method embodiment of the subframe configuration switching in the relay link of the present invention includes:
网络侧根据切换前子帧配置和 /或切换后子帧配置的上行 HARQ进程数， 确定切换后的子帧配置。  The network side determines the subframe configuration after the handover according to the number of uplink HARQ processes configured before the handover and/or the subframe after the handover.
其中， 切换后子帧配置的上行 HARQ进程数满足切换前子帧配置和切换 后子帧配置的上行 HARQ进程平均时延小于预定时延门限的要求， 网络侧根 据满足该要求的切换后子帧配置的上行 HARQ 进程数确定切换后的子帧配 置。  The number of uplink HARQ processes configured in the subframe after the handover is configured to meet the requirement that the average delay of the uplink HARQ process configured in the subframe configuration before the handover and the subframe configuration after the handover is less than the predetermined delay threshold, and the network side according to the handover subframe that meets the requirement. The configured number of uplink HARQ processes determines the subframe configuration after switching.
其中， 切换后子帧配置的上行 HARQ进程数满足切换前后子帧配置的上 行 HARQ进程周期长度相同的要求， 网络侧根据满足该要求的切换后子帧配 置的上行 HARQ进程数确定切换后的子帧配置  The number of the uplink HARQ processes configured in the subframe after the handover is the same as the requirement of the uplink HARQ process in the subframe configuration before and after the handover, and the network side determines the switched subframe according to the number of uplink HARQ processes configured in the switched subframe that meets the requirement. Frame configuration
其中， 网络侧根据切换前子帧配置的循环移位所对应的子帧配置， 确定 切换后的子帧配置。  The network side determines the subframe configuration after the handover according to the subframe configuration corresponding to the cyclic shift of the subframe configuration before the handover.
本发明中的中继链路下行链路子帧号（ DL subframe number )和上行链路 子帧号分别按下列公式（1 )、 ( 2 )计算： DL subframe number= 10 * SFN+DL subframe index ( 1 )The relay link downlink subframe number (DL subframe number) and the uplink subframe number in the present invention are calculated according to the following formulas (1) and (2), respectively: DL subframe number= 10 * SFN+DL subframe index ( 1 )
UL subframe number= 10 * SFN+UL subframe index ( 2 ) 式中， UL subframe number= 10 * SFN+UL subframe index ( 2 ) where
SFN表示***帧号 ( System Frame Number );  SFN indicates the system frame number (System Frame Number);
DL subframe index为下行链路为子帧索引， 表示 1个无线帧 ( frame ) 中 包括的 10个子帧（subframe )的索引， 其范围为 （#0、 #1、 #2、 #3、 #4、 #5、 #6、 #7、 #8、 #9 );  The DL subframe index is a sub-frame index of the downlink, and represents an index of 10 sub-frames included in one radio frame (frame), and the range is (#0, #1, #2, #3, #4). , #5, #6, #7, #8, #9 );
UL subframe index为上行链路为子帧索引， 表示 1个 frame中包括的 10 个 subframe的索引， 其范围为（#0、 #1、 #2、 #3、 #4、 #5、 #6、 #7、 #8、 #9 )。  The UL subframe index is an uplink index, which indicates an index of 10 subframes included in one frame, and the range is (#0, #1, #2, #3, #4, #5, #6, #7, #8, #9 ).
实施例 1 : 网络侧根据切换前子帧配置和切换后子帧配置的上行 HARQ 进程数确定具体切换的子帧配置， 包括如下 6个应用实例。 Embodiment 1: The network side determines the subframe configuration of the specific handover according to the number of uplink HARQ processes configured in the subframe configuration before the handover and the subframe configuration after the handover, and includes the following six application examples.
应用实例 1  Application example 1
若切换前子帧配置的上行 HARQ 进程数大于切换后子帧配置的上行 HARQ进程数， 则将对应于切换后子帧配置的上行 HARQ进程数且属于切换 前二进制子帧配置子集的组合配置作为切换后的子帧配置。  If the number of uplink HARQ processes configured in the subframe before the handover is greater than the number of uplink HARQ processes configured in the subframe after the handover, the number of uplink HARQ processes corresponding to the configuration of the subframe after the handover and the combination configuration of the subset of the binary subframes before the handover are configured. As a sub-frame configuration after switching.
假设切换前子帧配置的上行 HARQ进程数为 4 ( m=4 ) , 且对应于子帧 组合信令为十进制数 "15 (二进制数 00001111 ) " , 表示切换前子帧的组合 配置为 "15" ； 而切换后子帧配置上行 HARQ进程数为 3 ( η=3 ) , 也就是说 m大于 n。  It is assumed that the number of uplink HARQ processes configured in the pre-switching subframe is 4 (m=4), and the sub-frame combined signaling is a decimal number "15 (binary number 00001111)", indicating that the combined configuration of the pre-switching subframe is "15". The number of uplink HARQ processes configured in the subframe after switching is 3 ( η=3 ), that is, m is greater than n.
切换前子帧的组合配置对应的子集数为以 "2" 为底的 N次幂（即子集 数 =2N ) ， 其中 N为二进制子帧配置信令中 "1" 的个数。 The number of subsets corresponding to the combined configuration of the subframes before handover is the power of N at the base of "2" (ie, the number of subsets = 2 N ), where N is the number of "1"s in the signaling configuration of the binary subframe.
在此， 切换前子帧的组合配置 "15 ( 00001111 ) " 对应的子集数为 2的 4次方， 等于 16, 表示共有 16个子帧配置。 由表 2可知， 根据上行 HARQ 进程数为 3 , 相应地获取属于 "15" 的二进制组合配置子集的组合配置共有 4 个， 分别为 "7 ( 00000111 ) " 、 "11 ( 00001011 ) " 、 "13 ( 00001101 ) " 和 "14 ( 00001110 ) " , 则切换后子帧配置可在这 4个组合配置中进行选择。 当然， 切换后子帧配置也可以选择切换前子帧配置对应的子帧集合构成 的子帧配置本身， 即组合配置 "15" 。 Here, the number of subsets corresponding to the combination configuration "15 ( 00001111 ) " of the pre-switching subframe is 2 to the 4th power, which is equal to 16, indicating that there are 16 subframe configurations in total. As can be seen from Table 2, according to the number of uplink HARQ processes being 3, the combined configuration of the binary combination configuration subsets belonging to "15" is correspondingly divided into four, respectively "7 ( 00000111 ) " , " 11 ( 00001011 ) " , " 13 ( 00001101 ) " and "14 ( 00001110 ) " , then the switched subframe configuration can be selected in these four combined configurations. Of course, the subframe configuration after the handover may also select the subframe configuration itself formed by the subframe set corresponding to the previous subframe configuration, that is, the combination configuration "15".
本发明通过上述釆用切换前子帧配置本身或子集的方式， 能够使得切换 后的上行 HARQ进程匹配于切换前的上行 HARQ进程，从而继续切换前的上 行 HARQ进程的传输。  The method of the present invention can make the uplink HARQ process after the handover match the uplink HARQ process before the handover, so as to continue the transmission of the uplink HARQ process before the handover, by using the method of configuring the pre-switching subframe configuration itself or the subset.
应用实例 2 Application example 2
若切换前子帧配置的上行 HARQ 进程数小于切换后子帧配置的上行 HARQ进程数， 则将对应于切换后子帧配置的上行 HARQ进程数且包含切换 前二进制子帧配置的组合配置作为切换后的子帧配置。  If the number of uplink HARQ processes configured in the subframe before the handover is smaller than the number of uplink HARQ processes configured in the subframe after the handover, the combination of the number of uplink HARQ processes corresponding to the subframe configuration after the handover and the configuration of the binary subframe configuration before the handover is used as the handover. Subframe configuration.
假设切换前子帧配置的上行 HARQ进程数为 5 ( m=5 ) , 且对应的子帧 组合信令为十进制数 "230 (二进制数 11100110 ) " , 表示切换前子帧的组 合配置为 "230" ； 而切换后子帧配置上行 HARQ进程数为 6 ( η=6 ) , 也就 是说 m小于 n。  It is assumed that the number of uplink HARQ processes configured in the subframe before handover is 5 (m=5), and the corresponding subframe combination signaling is a decimal number "230 (binary number 11100110)", indicating that the combination configuration of the subframe before handover is "230" The number of uplink HARQ processes in the subframe after handover is 6 ( η=6 ), that is, m is smaller than n.
切换前子帧的组合配置对应的被包含数为以 "2" 为底的 M次幂（即被 包含数 =2M ) ， 其中 M为二进制子帧配置信令中 "0" 的个数。 The combined number of the combined configuration of the pre-switching subframes is the power of M at the base of "2" (ie, the number of included = 2 M ), where M is the number of "0" in the binary subframe configuration signaling.
在此， 组合配置 "230 ( 11100110 ) " 对应的被包含数为 2的 3次方， 等 于 8, 表示共有 8个被包含的子帧配置。 从表 2可知， 根据上行 HARQ进程 数为 6, 可相应地获取包含 "230" 二进制组合配置的组合配置共有 5个（即 二进制数 "11100110" 中除了三个 "0"可以变以外， 其它的 "1" 不能变）， 分别为 "231 ( 11100111 )，， 、 "239 ( 11101111 )，， 、 "247 ( 11110111 )，， 、 "254 ( 11111110 ) " 、 "255 ( 11111111 ) " , 则切换后子帧配置可在这 5 个组合配置中进行选择。  Here, the combined configuration "230 ( 11100110 ) " corresponds to the 3rd power of the number 2, and equal to 8, indicating that there are a total of 8 included subframe configurations. It can be seen from Table 2 that according to the number of uplink HARQ processes is 6, a total of five combined configurations including the "230" binary combination configuration can be obtained correspondingly (that is, the binary number "11100110" can be changed except for three "0"s. "1" cannot be changed), respectively, "231 ( 11100111 ),, "239 ( 11101111 ), , "247 ( 11110111 ), , "254 ( 11111110 ) " , "255 ( 11111111 ) " ) The sub-frame configuration can be selected in these five combined configurations.
当然， 切换后子帧配置也可以选择切换前子帧的组合配置对应的子帧集 合构成的子帧配置本身， 即组合配置 "230" 。  Of course, the subframe configuration after the handover may also select the subframe configuration itself formed by the subframe combination corresponding to the combined configuration of the previous subframes, that is, the combination configuration "230".
当若切换前子帧配置的上行 HARQ进程数 m等于切换后子帧配置的上行 HARQ进程数 n, 则切换后子帧配置可选为具有 HARQ进程数为 n对应的任 何一个子帧配置。 本发明通过上述釆用切换前子帧配置本身或包含切换前子帧配置的子帧 配置方式，能够使得切换后的上行 HARQ进程匹配于切换前的上行 HARQ进 程， 从而继续切换前的上行 HARQ进程的传输。 If the number of the uplink HARQ processes configured in the subframe is the same as the number of the uplink HARQ processes configured in the subframe after the handover, the subframe configuration after the handover may be any subframe configuration corresponding to the number of the HARQ processes being n. The present invention can make the uplink HARQ process after the handover match the uplink HARQ process before the handover, and continue the uplink HARQ process before the handover, by using the subframe configuration before the handover or the subframe configuration including the configuration of the pre-switch subframe. Transmission.
应用实例 3 Application example 3
在切换前子帧配置的上行 HARQ进程没有正确完成传输的情况下， 若该 上行 HARQ进程的进程数 k大于切换后的上行 HARQ进程数 n, 则网络侧和 /或接收端丟弃或者挂起 ( k-n )个上行 HARQ进程， 并且网络侧将切换后子 帧配置的上行 HARQ进程数对应的任何一个组合配置确定为切换后的子帧配 置； 若 k小于或等于 n, 则网络侧将具有切换后子帧配置的上行 HARQ进程 数 n对应的任何一个子帧配置选为切换后子帧配置。  If the number of processes k of the uplink HARQ process is greater than the number of uplink HARQ processes after the handover, the network side and/or the receiving end discard or suspend if the uplink HARQ process configured in the previous subframe is not correctly completed. (kn) an uplink HARQ process, and the network side determines any combination configuration corresponding to the number of uplink HARQ processes configured in the subframe after handover as the subframe configuration after handover; if k is less than or equal to n, the network side will have handover Any one of the subframe configurations corresponding to the number of uplink HARQ processes configured in the subsequent subframe is selected as the subframe configuration after the handover.
或者，在切换前子帧配置的上行 HARQ进程没有正确完成传输的情况下： 当切换前子帧配置的上行 HARQ进程数 m大于切换后子帧配置的上行 HARQ进程数 n时， 若切换前子帧配置没有正确完成传输的上行 HARQ进程 数 k小于或等于 n,则网络侧根据对应于 n且属于切换前二进制子帧配置子集 的组合配置， 确定切换后的子帧配置； 若 k大于 n, 则网络侧和 /或接收侧丟 弃或挂起（ k-n )个上行 HARQ进程， 并且网络侧根据对应于 n且属于切换前 二进制子帧配置子集对应的子帧配置， 确定切换后的子帧配置。  Or, if the uplink HARQ process configured in the pre-switching subframe does not complete the transmission correctly: when the number of uplink HARQ processes configured in the subframe before the handover is greater than the number of uplink HARQ processes configured in the subframe after the handover, if the number of uplink HARQ processes is n, If the number of uplink HARQ processes that are not correctly completed in the frame configuration is less than or equal to n, the network side determines the subframe configuration after the handover according to the combined configuration corresponding to n and belongs to the subset of the configuration of the binary subframes before the handover; if k is greater than n Then, the network side and/or the receiving side discards or suspends (kn) uplink HARQ processes, and the network side determines the sub-switching according to the subframe configuration corresponding to n and belongs to the subset of the pre-switching binary subframe configuration. Frame configuration.
当切换前子帧配置的上行 HARQ进程数 m小于或等于切换后子帧配置的 上行 HARQ进程数 n时， 若切换前子帧配置没有正确完成传输的上行 HARQ 进程数 k小于或等于 n时， 则网络侧根据对应于 n且包含切换前二进制子帧 配置的子帧配置， 确定切换后的子帧配置。  If the number of uplink HARQ processes configured in the subframe before the handover is less than or equal to the number of uplink HARQ processes configured in the subframe after the handover, if the number of uplink HARQ processes that are not correctly completed before the handover is less than or equal to n, Then, the network side determines the subframe configuration after the handover according to the subframe configuration corresponding to n and including the configuration of the pre-switching binary subframe.
在此，切换前子帧配置的上行 HARQ进程尚未正确完成传输，具体是指： 在切换前子帧配置的上行 HARQ进程中最后一次重传还没有正确传输， 或者 在切换前子帧配置的上行 HARQ进程中还没有收到上行数据对应的下行确认 信息， 或者在切换前子帧配置的上行 HARQ进程中到达最大重传次数后最后 一次重传还没有正确传输。  Here, the uplink HARQ process configured in the pre-switching subframe has not been correctly completed. Specifically, the last retransmission in the uplink HARQ process configured before the handover is not correctly transmitted, or the uplink configuration is configured before the handover. The downlink acknowledgement information corresponding to the uplink data has not been received in the HARQ process, or the last retransmission has not been correctly transmitted after the maximum number of retransmissions is reached in the uplink HARQ process configured in the subframe before the handover.
假设切换前子帧配置没有正确完成传输的上行 HARQ进程的进程数为 5 ( k=5 ) , 切换后子帧配置的上行 HARQ进程数为 3 ( η=3 ) , 也就是说 k大 于 n; Assume that the number of processes of the uplink HARQ process that does not correctly complete the transmission before the handover is 5 ( k=5 ), the number of uplink HARQ processes configured in the subframe after handover is 3 ( η=3 ), that is, k is greater than n;
则网络侧和 /或接收端丟弃或者挂起 2 ( 5-3=2 )个上行 HARQ进程， 并 且网络侧将具有切换后子帧配置的上行 HARQ进程数 3的任何一个子帧配置 选为切换后子帧配置。  Then, the network side and/or the receiving end discards or suspends 2 (5-3=2) uplink HARQ processes, and the network side selects any one of the subframe configurations of the number of uplink HARQ processes with the configured subframe configuration of the switched subframes as Sub-frame configuration after switching.
在切换前子帧配置的上行 HARQ进程没有正确完成传输时， 通过釆用上 述方式，能够使得切换后的上行 HARQ进程匹配于切换前的上行 HARQ进程， 从而继续切换前的上行 HARQ进程的传输。  When the uplink HARQ process configured in the pre-switching subframe does not complete the transmission correctly, the uplink HARQ process after the handover can be matched with the uplink HARQ process before the handover, so that the transmission of the uplink HARQ process before the handover is continued.
应用实例 4 Application example 4
网络侧根据满足切换后子帧配置的上行 HARQ进程平均时延要求的切换 后子帧配置的上行 HARQ进程数所对应的组合配置，确定切换后的子帧配置。  The network side determines the subframe configuration after the handover according to the combination configuration corresponding to the number of uplink HARQ processes configured in the subframe after the handover of the uplink HARQ process that meets the requirements of the uplink HARQ process.
假设切换后子帧配置的上行 HARQ进程数为 3 , 且上行 HARQ进程的平 均时延要求小于时延门限（ 13.33ms ) , 由表 2可知， 256个子帧配置中满足 该条件的共有 48个， 其中上行 HARQ进程数为 3的子帧配置共有 2个， 分 别为 "85" 和 "170" , 则切换后子帧配置在这 2个子帧配置中进行选择。  It is assumed that the number of uplink HARQ processes configured in the subframe after the handover is 3, and the average delay requirement of the uplink HARQ process is less than the delay threshold (13.33 ms). As shown in Table 2, a total of 48 256 subframe configurations satisfy the condition. The subframe configuration in which the number of uplink HARQ processes is 3 is two, which are respectively "85" and "170", and the subframe configuration after switching is selected in the two subframe configurations.
通过釆用上述满足上行 HARQ进程的时延需求来实现中继链路中子帧配 置切换， 实际上仍是满足 HARQ进程数需求的一种切换方式。  The subframe configuration switching in the relay link is implemented by using the above-mentioned delay requirement that satisfies the uplink HARQ process, and is actually still a handover mode that satisfies the HARQ process number requirement.
应用实例 5 Application example 5
网络侧根据满足切换前后子帧配置的上行 HARQ进程周期长度相同的切 换后子帧配置的上行 HARQ进程数所对应的子帧配置， 确定切换后的子帧配 置。  The network side determines the subframe configuration after the handover according to the subframe configuration corresponding to the number of uplink HARQ processes configured by the switched subframes having the same uplink HARQ process period configured in the subframe configuration before and after the handover.
假设切换后子帧配置的上行 HARQ进程数为 6, 且切换前子帧配置上行 HARQ进程周期长度为 40ms, 如图 3所示 （ "Un-，， 表示中继链路， "Uu-，， 表示接入链路； "-DL" 表示相应链路的下行链路， "-UL" 表示相应链路的 上行链路； 带 "X" 的子帧为前述具有特殊用途的不可配置的子帧） ； 第 1 个 40ms内共有 6个进程， 并且在 40ms时间内最大都是重传了 3次； 第 2个 40ms是第 1个 40ms的周期性重复， 故图 3中未再绘出。 为了表达清晰， 将 图 3中的切换前子帧配置的上行 HARQ进程周期（ 40ms )内 6个 HARQ进程 (①〜⑥） 的子帧配置分解在图 4的上下 6个部分中。 Assume that the number of uplink HARQ processes configured in the subframe after the handover is 6, and the length of the uplink HARQ process configured in the subframe before the handover is 40 ms, as shown in Figure 3 ("Un-," indicates the relay link, "Uu-,, Indicates the access link; "-DL" indicates the downlink of the corresponding link, "-UL" indicates the uplink of the corresponding link; subframe with "X" indicates the aforementioned non-configurable subframe with special purpose. There are 6 processes in the first 40ms, and the maximum is retransmitted 3 times in 40ms; the second 40ms is the first 40ms periodic repetition, so it is not drawn in Figure 3. For clarity of presentation, the subframe configuration of the six HARQ processes (1 to 6) in the uplink HARQ process period (40 ms) of the pre-switching subframe configuration in FIG. 3 is decomposed into the upper and lower six sections of FIG.
切换后子帧配置的上行 HARQ进程重复周期长度也为 40ms,或是***指 定的重复周期长度也为 40ms时， 在 256个子帧配置中（表 2所示）满足这一 条件的子帧配置共有 212个， 其中上行 HARQ进程数为 6的共有 9个子帧配 置， 分别为 "63" 、 "126" 、 "159" 、 "207" 、 "231" 、 "243" 、 "249" 、 "252" 和 "255" , 则切换后子帧配置在这 9个子帧配置中进行选择。  The length of the uplink HARQ process repetition period configured in the subframe after handover is also 40 ms, or the system specifies a repetition period length of 40 ms. In the 256 subframe configurations (shown in Table 2), the subframe configuration that satisfies this condition is common. 212, in which the number of uplink HARQ processes is 6 and there are 9 subframe configurations, respectively, "63", "126", "159", "207", "231", "243", "249", "252" And "255", then the switched subframe configuration is selected in the 9 subframe configurations.
满足上述条件子帧配置是指： 切换后子帧配置的上行 HARQ进程重复周 期与切换前子帧配置的上行 HARQ进程重复周期相同所对应的子帧配置； 或 是与切换前子帧配置的上行 HARQ进程重复周期相同的切换后指定的重复周 期所对应的子帧配置。  The subframe configuration that satisfies the above conditions is: the subframe configuration corresponding to the uplink HARQ process repetition period configured in the subframe after handover and the uplink HARQ process repetition period configured in the pre-switch subframe configuration; or the uplink configuration configured with the pre-switch subframe configuration The HARQ process repeats the subframe configuration corresponding to the repetition period specified after the handover.
通过釆用上述满足上行 HARQ进程重复周期长度需求来实现中继链路中 子帧配置切换， 实际上仍是满足 HARQ进程数需求的一种切换方式。  The subframe configuration switch in the relay link is implemented by using the above-mentioned requirements for satisfying the uplink HARQ process repetition period length, and is actually still a handover mode that satisfies the HARQ process number requirement.
应用实例 6 Application example 6
网络侧根据切换前子帧配置的循环移位所对应的子帧配置， 确定切换后 的子帧配置。  The network side determines the subframe configuration after the handover according to the subframe configuration corresponding to the cyclic shift of the subframe configuration before the handover.
假设切换前子帧配置的上行 HARQ进程数为 2, 且对应的子帧组合信令 为十进制 "5" (即二进制 "00000101" ) , 则对应的二进制向左或向右循环 移位后对应的子帧配置共有 7个子帧配置， 对应的子帧配置分别为 "10" 、 Assume that the number of uplink HARQ processes configured in the subframe before handover is 2, and the corresponding subframe combination signaling is decimal "5" (ie, binary "00000101"), and the corresponding binary is cyclically shifted to the left or right. The subframe configuration has a total of 7 subframe configurations, and the corresponding subframe configurations are respectively "10".
"20" 、 "40" 、 "80" 、 "160" 、 "65" 和 "130" , 则切换后子帧配置 在这 7个子帧配置中进行选择， 当然也可以选择切换前子帧配置对应的子帧 集合构成的子帧配置本身， 即子帧配置 "5" 。 "20", "40", "80", "160", "65", and "130", the subframe configuration after switching is selected in the 7 subframe configurations, and of course, the configuration of the previous subframe configuration may be selected. The sub-frame set consists of the sub-frame configuration itself, ie the sub-frame configuration "5".
釆用上述切换前子帧配置的循环移位的方式， 主要是为了在有些情况下 满足子帧配置的移位需求。  The manner of cyclic shifting configured by the above-mentioned pre-switching subframe configuration is mainly to satisfy the shift requirement of the subframe configuration in some cases.
当然， 本发明还可有其他多种实施例， 在不背离本发明精神及其实质的 但这些相应的改变和变形都应属于本发明所附的权利要求的保护范围。 Of course, the invention may have other various embodiments without departing from the spirit and spirit of the invention. However, such corresponding changes and modifications are intended to be included within the scope of the appended claims.
工业实用性 Industrial applicability
与现有技术相比，本发明能够很好地适用于基站到中继节点的中继链路， 且无需引入信令开销， 既保证了后向兼容性（兼容 LTE***） ， 也解决了在 进行中继链路的子帧配置切换过程中出现严重的 HARQ传输不匹配的问题。  Compared with the prior art, the present invention can be well applied to a relay link of a base station to a relay node, and does not need to introduce signaling overhead, which not only ensures backward compatibility (compatible with LTE system), but also solves A serious HARQ transmission mismatch occurs during the subframe configuration switching of the relay link.

Claims

权 利 要 求 书 Claim
1、 一种中继链路中子帧配置切换的方法， 包括：  A method for switching a subframe configuration in a relay link, comprising:
网络侧根据切换前子帧配置和 /或切换后子帧配置的上行混合自动重传 请求进程数， 确定切换后的子帧配置。  The network side determines the subframe configuration after the handover according to the number of uplink hybrid automatic repeat request processes configured before the handover subframe configuration and/or the switched subframe configuration.
2、 按照权利要求 1 所述的方法， 其中， 根据切换前子帧配置和 /或切换 后子帧配置的上行混合自动重传请求进程数确定切换后的子帧配置的步骤包 括：  2. The method according to claim 1, wherein the step of determining the subframe configuration after the handover according to the number of uplink hybrid automatic repeat request processes configured before the handover subframe configuration and/or the handover subframe configuration comprises:
若切换前子帧配置的上行混合自动重传请求进程数大于切换后子帧配置 的上行混合自动重传请求进程数， 则根据对应于切换后子帧配置的上行混合 自动重传请求进程数且属于切换前二进制子帧配置子集的组合配置， 确定切 换后的子帧配置； 或者， 将所述切换前子帧配置确定为切换后的子帧配置。  If the number of the uplink hybrid automatic repeat request process configured in the subframe before the handover is greater than the number of the uplink hybrid automatic repeat request process configured in the subframe after the handover, the number of the uplink hybrid automatic repeat request processes corresponding to the configured subframe after the handover is performed. A combination configuration of the subset of the configuration of the binary subframes before the handover is performed, and the subframe configuration after the handover is determined; or the subframe configuration before the handover is determined as the subframe configuration after the handover.
3、 按照权利要求 1 所述的方法， 其中， 根据切换前子帧配置和 /或切换 后子帧配置的上行混合自动重传请求进程数确定切换后的子帧配置的步骤包 括：  The method according to claim 1, wherein the step of determining the subframe configuration after the handover according to the number of uplink hybrid automatic repeat request processes configured before the handover subframe configuration and/or the handover subframe configuration includes:
若切换前子帧配置的上行混合自动重传请求进程数小于切换后子帧配置 的上行混合自动重传请求进程数， 则根据对应于切换后子帧配置的上行混合 自动重传请求进程数且包含切换前二进制子帧配置的组合配置， 确定切换后 的子帧配置； 或者， 将所述切换前子帧配置确定为切换后的子帧配置。  If the number of the uplink hybrid automatic repeat request process configured in the subframe before the handover is smaller than the number of the uplink hybrid automatic repeat request process configured in the subframe after the handover, the number of the uplink hybrid automatic repeat request process corresponding to the configured subframe after the handover is performed. The combined configuration of the binary subframe configuration before the handover is performed to determine the subframe configuration after the handover; or the subframe configuration before the handover is determined as the subframe configuration after the handover.
4、 按照权利要求 1 所述的方法， 其中， 根据切换前子帧配置和 /或切换 后子帧配置的上行混合自动重传请求进程数确定切换后的子帧配置的步骤包 括：  The method according to claim 1, wherein the step of determining the subframe configuration after the handover according to the number of uplink hybrid automatic repeat request processes configured before the handover subframe configuration and/or the handover subframe configuration includes:
若切换前子帧配置的上行混合自动重传请求进程数等于切换后子帧配置 的上行混合自动重传请求进程数， 则根据所述上行混合自动重传请求进程数 所对应的任何一个组合配置， 确定切换后的子帧配置。  If the number of uplink hybrid automatic repeat request processes configured in the subframe before the handover is equal to the number of uplink hybrid automatic repeat request processes configured in the subframe after the handover, any combination configuration corresponding to the number of uplink hybrid automatic repeat request processes is configured. , Determine the subframe configuration after switching.
5、 按照权利要求 1所述的方法， 还包括： 在切换前子帧配置的上行混 合自动重传请求进程没有正确完成传输的情况下， 若切换前子帧配置没有正 确完成传输的上行混合自动重传请求进程数 k大于切换后子帧配置的上行混 合自动重传请求进程数 n, 则所述网络侧和 /或接收端丟弃或者挂起（k-n )个 上行混合自动重传请求进程； 5. The method according to claim 1, further comprising: if the uplink hybrid automatic repeat request process configured in the pre-switching subframe does not correctly complete the transmission, if the pre-switching subframe configuration does not correctly complete the uplink hybrid automatic transmission If the number of retransmission request processes is greater than the number of uplink hybrid automatic repeat request processes n configured in the subframe after the handover, the network side and/or the receiver may discard or suspend (kn) Uplink hybrid automatic repeat request process;
根据切换前子帧配置和 /或切换后子帧配置的上行混合自动重传请求进 程数确定切换后的子帧配置的步骤包括： 所述网络侧将切换后子帧配置的上 行混合自动重传请求进程数对应的任何一个组合配置确定为切换后的子帧配 置。  The step of determining the subframe configuration after the handover according to the number of the uplink hybrid automatic retransmission request configured by the pre-switching subframe configuration and/or the handover subframe configuration includes: the network side automatically retransmits the uplink hybrid configured by the handover subframe configuration Any combination configuration corresponding to the number of request processes is determined as the subframe configuration after the handover.
6、 按照权利要求 5所述的方法， 其中， 根据切换前子帧配置和 /或切换 后子帧配置的上行混合自动重传请求进程数确定切换后的子帧配置的步骤还 包括：  The method according to claim 5, wherein the step of determining the subframe configuration after the handover according to the number of uplink hybrid automatic repeat request processes configured in the pre-switch subframe configuration and/or the handover subframe configuration further includes:
若所述 k小于或等于所述 n, 则所述网络侧将具有切换后子帧配置的上 行混合自动重传请求进程数的任何一个子帧配置选为切换后子帧配置。  If the k is less than or equal to the n, the network side selects any one of the subframe configurations of the uplink hybrid automatic repeat request process with the configured subframe configuration as the switched subframe configuration.
7、 按照权利要求 1 所述的方法， 其中， 根据切换前子帧配置和 /或切换 后子帧配置的上行混合自动重传请求进程数确定切换后的子帧配置的步骤包 括：  7. The method according to claim 1, wherein the step of determining the subframe configuration after the handover according to the number of uplink hybrid automatic repeat request processes configured before the handover subframe configuration and/or the handover subframe configuration comprises:
在切换前子帧配置的上行混合自动重传请求进程没有正确完成传输的情 况下， 且当切换前子帧配置的上行混合自动重传请求进程数 m大于切换后子 帧配置的上行混合自动重传请求进程数 n时， 若切换前子帧配置没有正确完 成传输的上行混合自动重传请求进程数 k小于或等于 n, 则所述网络侧根据 对应于所述 n且属于切换前二进制子帧配置子集的组合配置， 确定切换后的 子帧配置；  If the uplink hybrid automatic repeat request process configured in the pre-switching subframe does not complete the transmission correctly, and the number of uplink hybrid automatic repeat request processes configured in the subframe before the handover is greater than the uplink hybrid automatic configuration configured in the subframe after the handover When the number of the requested processes is n, if the number of uplink hybrid automatic repeat request processes k that does not correctly complete the transmission before the handover is less than or equal to n, the network side according to the n corresponding to the n and belongs to the pre-switching binary subframe Configure a combined configuration of the subset to determine the subframe configuration after the handover;
若所述 k大于 n, 则网络侧和 /或接收侧丟弃或挂起 ( k-n )个上行混合自 动重传请求进程， 并且根据对应于所述 n且属于切换前二进制子帧配置子集 的子帧配置， 确定切换后的子帧配置。  If the k is greater than n, the network side and/or the receiving side discards or suspends (kn) the uplink hybrid automatic repeat request process, and according to the subset corresponding to the n and belongs to the pre-switching binary subframe configuration. Subframe configuration determines the subframe configuration after switching.
8、按照权利要求 1所述的方法， 其中， 根据切换前子帧配置和 /或切换后子 帧配置的上行混合自动重传请求进程数确定切换后的子帧配置的步骤包括： 在切换前子帧配置的上行混合自动重传请求进程没有正确完成传输的情 况下， 且当切换前子帧配置的上行混合自动重传请求进程数 m小于或等于切 换后子帧配置的上行混合自动重传请求进程数 n时， 若切换前子帧配置没有 正确完成传输的上行混合自动重传请求进程数 k小于或等于 n时， 则所述网 络侧根据对应于所述 n且包含切换前二进制子帧配置的子帧配置， 确定切换 后的子帧配置。 The method according to claim 1, wherein the step of determining the subframe configuration after the handover according to the number of uplink hybrid automatic repeat request processes configured before the handover subframe configuration and/or the handover subframe configuration comprises: before the handover If the uplink hybrid automatic repeat request process configured by the subframe does not complete the transmission correctly, and the number of uplink hybrid automatic repeat request processes configured in the subframe before the handover is less than or equal to the uplink hybrid automatic retransmission of the subframe configuration after the handover When the number of requested processes is n, if the number of uplink hybrid automatic repeat request processes k that does not correctly complete the transmission before the handover is less than or equal to n, then the network The network side determines the subframe configuration after the handover according to the subframe configuration corresponding to the n and including the pre-switching binary subframe configuration.
9、 按照权利要求 5至 8任一项所述的方法， 其中， 切换前子帧配置的上 行混合自动重传请求进程没有正确完成传输是指以下情况中的一种或多种： 在所述切换前子帧配置的上行混合自动重传请求进程中最后一次重传还 没有正确传输；  The method according to any one of claims 5 to 8, wherein the uplink hybrid automatic repeat request process of the pre-switching subframe configuration does not correctly complete the transmission refers to one or more of the following situations: The last retransmission in the uplink hybrid automatic repeat request process configured before the handover is not correctly transmitted.
在所述切换前子帧配置的上行混合自动重传请求进程中还没有收到上行 数据对应的下行确认信息； 以及  The downlink acknowledgement information corresponding to the uplink data has not been received in the uplink hybrid automatic repeat request process configured in the pre-switching subframe;
在所述切换前子帧配置的上行混合自动重传请求进程中到达最大重传次 数后， 最后一次重传还没有正确传输。  After the maximum number of retransmissions is reached in the uplink hybrid automatic repeat request process configured in the pre-switching subframe, the last retransmission has not been correctly transmitted.
10、 按照权利要求 1所述的方法， 其中， 所述切换后子帧配置的上行混 合自动重传请求进程数满足切换后子帧配置的上行混合自动重传请求进程的 平均时延小于预定的时延门限的要求；  10. The method according to claim 1, wherein the number of uplink hybrid automatic repeat request processes configured in the subframe after the handover is equal to an average delay of the uplink hybrid automatic repeat request process configured in the subframe after the handover is smaller than a predetermined one. Delay threshold requirements;
根据切换前子帧配置和 /或切换后子帧配置的上行混合自动重传请求进 程数确定切换后的子帧配置的步骤包括： 所述网络侧根据所述切换后子帧配 置的上行混合自动重传请求进程数所对应的组合配置， 确定切换后的子帧配 置。  The step of determining the configured subframe configuration according to the number of the uplink hybrid automatic retransmission request process configured by the pre-switching subframe configuration and/or the switched subframe configuration includes: the network side automatically configuring the uplink hybrid according to the switched subframe configuration The combination configuration corresponding to the number of retransmission request processes determines the subframe configuration after the handover.
11、 按照权利要求 1所述的方法， 其中， 所述切换后子帧配置的上行混合 自动重传请求进程数满足切换前及切换后子帧配置的上行混合自动重传请求 进程的周期长度相同的要求；  The method according to claim 1, wherein the number of uplink hybrid automatic repeat request processes configured in the subframe after the handover meets the same period of the uplink hybrid automatic repeat request process configured before the handover and after the handover subframe configuration Requirements
根据切换前子帧配置和 /或切换后子帧配置的上行混合自动重传请求进 程数确定切换后的子帧配置的步骤包括： 所述网络侧根据所述切换后子帧配 置的上行混合自动重传请求进程数所对应的组合配置， 确定切换后的子帧配 置。  The step of determining the configured subframe configuration according to the number of the uplink hybrid automatic retransmission request process configured by the pre-switching subframe configuration and/or the switched subframe configuration includes: the network side automatically configuring the uplink hybrid according to the switched subframe configuration The combination configuration corresponding to the number of retransmission request processes determines the subframe configuration after the handover.
12、按照权利要求 1所述的方法， 其中， 根据切换前子帧配置和 /或切换后子 帧配置的上行混合自动重传请求进程数确定切换后的子帧配置的步骤包括： 所述网络侧根据所述切换前子帧配置的循环移位所对应的子帧配置， 确 定所述切换后的子帧配置。  The method according to claim 1, wherein the step of determining the subframe configuration after the handover according to the number of uplink hybrid automatic repeat request processes configured before the handover subframe configuration and/or the handover subframe configuration comprises: the network The side determines the subframe configuration after the handover according to the subframe configuration corresponding to the cyclic shift of the pre-switching subframe configuration.
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