WO2012130005A1 - Method and system for processing uplink feedback information of backhaul link in tdd system - Google Patents

Abstract

The present invention provides a method and system for processing uplink feedback information of a backhaul link in a TDD system. The method comprises: a system predefining and/or a network side configuring a processing mode for an RN to process ACK/NACK feedback information to be reported; and the RN using the processing mode and the PUCCH format corresponding to the processing mode to process and bear the ACK/NACK feedback information and reporting same to the network side. The present invention effectively enables the RN to report ACK/NACK uplink feedback information to an eNB and fully takes advantage of the channel condition of the backhaul link, thereby improving the transmission efficiency of uplink feedback information of the backhaul link.

Description

 Method and system for processing uplink feedback information of backhaul link in TDD system

Technical field

 The present invention belongs to the field of mobile communications, and in particular, to a hybrid automatic repeat request (HQQ) uplink feedback information for a backhaul link in a TDD (Time Division Duplexing) system. ACK/NACK) processing method and system.

Background technique

 As an emerging technology, Relay technology has attracted more and more attention and is regarded as the key technology of B3G/4G. Since future wireless communication or cellular systems require complete network coverage and support for higher rate transmission, this poses new challenges for wireless communication technologies. At the same time, the cost of system construction and maintenance is even more acute. As the transmission rate and communication distance increase, the problem of battery energy consumption becomes prominent, and future wireless communication will use higher frequencies, resulting in more serious path loss attenuation. Through the relay technology, the traditional single-hop link can be divided into multiple multi-hop links. Due to the shortened distance, the path loss will be greatly reduced, which will improve the transmission quality and expand the communication range, thereby providing users with more Fast and better service.

 In a network that introduces a relay node (RN), as shown in FIG. 1, a link between a base station (eNB) and a macro user equipment (M-UE) in the network is called a direct transmission link ( Direct Link), the link between the base station and the relay station is called a backhaul link, also called a relay link. The link between the relay station and the Relay User Equipment (R-UE) is called the access link. (Access Link). Understandably, the M-UE is relative to the R-UE, and in a system without a relay, the user equipment is collectively referred to as a UE.

In the LTE (Long Term Evolution) system, the transmission of signals between the eNB and the UE needs to establish a HARQ process and perform corresponding feedback. After receiving the signal of the eNB, the UE generates uplink feedback information for the HARQ process according to the received decoding condition of the signal, and generates acknowledgement (ACK) feedback information if the receiving is correct, and generates non-acknowledgment (NACK) feedback information if the receiving is incorrect. The ACK/NACK information is uplinked to the eNB. The eNB performs the next processing according to the received feedback information. If an ACK is received, the eNB continues to transmit new data. If a NACK is received, the eNB will fail to receive the data. The data is retransmitted to the UE.

 On the direct transmission link of the LTE system, the ACK/NACK uplink feedback information is carried on the Physical Uplink Control Channel (PUCCH), and the PUCCH format that can be used to carry the ACK/NACK information includes: PUCCH format la/lb ( The PUCCH format lb (format lb with channel selection) based on the channel selection method, and the PUCCH format 3 are included.

 In the LTE TDD system, there are 7 different subframe configurations for 10ms radio frames, which are respectively TDD uplink/downlink subframe configuration (UL/DL Configuration) #0-#6, in each radio frame in different configurations, The number of sub-frames and special sub-frames and the location of the sub-frames are different. As shown in Table 1, "D" represents a downlink subframe, "U" represents an uplink subframe, and "S" represents a special subframe.

 Table 1 Up/down subordinates (Uplink-downlink configurations)

 Due to the asymmetry of the number of uplink and downlink subframes in the TDD system, ACK/NACK information for multiple downlink subframes needs to be carried in one uplink subframe, as shown in Table 2. The ACK/NACK information fed back in the UL subframe #n corresponds to the downlink transmission in the DL subframe #n-k, where

{H'.U.

Table 2: Downlink association set index K [k ₀ , k^ - - - k _M ―, } for TDD

, 其中 Μ表示此 UL子帧最大可承载的 ACK/NACK信息对应的 DL子帧数量。 每下行子帧对 应的 ACK/NACK信息包含 1或 2bit, 其中每一 bit反馈信息对应于 DL子帧 传输的一个传输块（ Transmission Block, TB ) ,也即对应一个码字（ codeword )。 In Table 2, for any UL subframe included

, where Μ indicates this The number of DL subframes corresponding to the maximum ACK/NACK information that can be carried by the UL subframe. The ACK/NACK information corresponding to each downlink subframe includes 1 or 2 bits, where each bit feedback information corresponds to one Transmission Block (TB) of the DL subframe transmission, that is, corresponds to one codeword (codeword).

 Due to the limited carrying capacity of the PUCCH format la/lb, the processing of ACK/NACK information in the TDD system is divided into two modes: binding mode (Bundling) and multiplexing mode (Multixing).

 The ACK/NACK bundling processing method is to perform an AND operation on the feedback information between the M items of ACK/NACK information, obtain the ACK/NACK information sequence after bundling, and then use the PUCCH format la/lb. Process mapping.

 The ACK/NACK multiplexing processing method refers to the items corresponding to different DL subframes.

The ACK/NACK information is in units of subframes, and performs AND operations on the feedback information corresponding to different codewords in the same subframe, and cascades the lbit information after the "AND" operation in DL subframe order to form a multiplexing. The ACK/NACK information sequence is processed and mapped using the PUCCH format lb. When M = l, the 1 or 2 bit feedback information of the DL subframe is not ANDed, and the PUCCH format la/lb is directly used for processing mapping.

 For the PUCCH format lb based on the channel selection, since multiple PUCCH resources are configured, for the amount of feedback information not exceeding 4 bits, the corresponding ACK/NACK information can be fed back by using the PUCCH channel resource selection used for mapping. For the amount of feedback information exceeding 4 bits, when the PUCCH format lb of the channel selection is used, the Bundling processing needs to be performed between the multiple codewords in the same subframe and/or the different DL subframes corresponding to the same UL subframe. Then select the appropriate resources to map.

 For different TDD UL/DL configurations, the applicable ACK/NACK information processing method is different due to the difference of M, that is, the number of DL/NACK corresponding maximum DL subframes to be fed back in each UL subframe. When ≤ 4, both Bundling and Multiplexing modes can be used. The UE uses the corresponding method to process the feedback information according to the configuration indication of the eNB. When > 4, the ACK/NACK information can only be processed by using the Bundling method.

On the backhaul link, there are multiple backhaul links and downlink subframe configurations Un UL/DL Sub-config for different TDD UL/DL configurations. As shown in Table 3, the flag "U" in the corresponding subframe position indicates that the subframe is configured as Un UL subframe on the network side, and the flag "D" indicates that the configuration is Un DL. Subframe. The network side uses the high layer signaling configuration to indicate the specific TDD UL/DL used by the RN.

Configuration and Un UL/DL Sub-config„

 Table 3 TDD Un UL/DL Sub-config

 As can be seen from Table 3, for Un UL subframes in each Un UL/DL Sub-config, one or more Un DL subframe data transmission corresponding ACK/NACK feedback needs to be fed back on one Un UL subframe. Unlike Un UL/DL Sub-config and TDD UL/DL Configuration, it is not possible to directly use the existing LTE method. Therefore, it is necessary to propose an applicable ACK/NACK feedback information processing method for Un UL/DL Sub-config.

Summary of the invention

 The technical problem to be solved by the present invention is to provide a method and a system for processing the uplink feedback information of the backhaul link in the TDD system, and the problem of the processing scheme of the uplink feedback information of the backhaul link which is not clear in the prior art has been solved.

 To solve the above technical problem, the present invention provides a method for processing uplink feedback information of a backhaul link in a time division duplex (TDD) system, the method comprising:

 The system pre-defined and/or configured by the network side to indicate a processing mode used by the relay station (RN) to process the ACK/NACK feedback information to be reported;

The RN uses the processing mode and a physical uplink control channel corresponding to the processing mode The (PUCCH) format processes and carries the ACK/NACK feedback information, and reports the information to the network side. The processing mode includes one or more of the following: a Bundling mode, a Multiplexing mode, and a level. Joint mode

 The PUCCH format includes one or more of the following: PUCCH format la, PUCCH format lb, channel selected PUCCH format lb, and PUCCH format 3. In the above method, the system or the network side is configured according to a backhaul link uplink/downlink subframe configuration (Un UL/DL Sub-config) or a backlink link in Un UL/DL Sub-config (Un UL/DL). The subframe ratio is predefined or configured to indicate the processing mode, and the Un UL/DL subframe ratio in the Un UL/DL Sub-config refers to the backhaul link uplink configured in the Un UL/DL Sub-config (Un The ratio of the UL) subframe to the number of backhaul link downlink (Un DL) subframes. The system pre-defining the processing mode includes: the system pre-defines a correspondence between the Un UL/DL Sub-config and the processing mode and the PUCCH format; the method further includes: the RN according to the currently used Un UL/DL Sub- Config and the corresponding relationship, determining a processing mode and a PUCCH format for processing the ACK/NACK feedback information; or

 The system pre-defining the processing mode includes: the system pre-defines a correspondence between the Un UL/DL Sub-config and the processing mode; the method further includes: the RN according to the currently used Un UL/DL Sub-config and the Determining a correspondence, determining a processing mode for processing the ACK/NACK feedback information, and further determining a PUCCH format according to the determined processing mode and the ACK/NACK feedback information amount. The network side configuration indicating the processing mode includes: the network side according to Un UL/DL

The Sub-config configuration indicates the processing mode and the PUCCH format. The method further includes: determining, by the RN, a processing mode and a PUCCH format for processing the ACK/NACK feedback information according to a configuration indication of the network side;

Or the network side configuration indicating the processing mode includes: the network side indicating the processing mode according to the Un UL/DL Sub-config configuration, the method further includes: determining, by the RN, according to the network side configuration indication, The processing mode of the ACK/NACK feedback information, and further determining the PUCCH format according to the determined processing mode and the amount of ACK/NACK feedback information. The system pre-defining the processing mode includes: the system pre-defining the correspondence between the Un UL/DL subframe ratio and the processing mode and the PUCCH format; the method further includes: the RN according to the currently used Un UL/DL Sub- a ratio of the Un UL/DL subframe in the config and the corresponding relationship, determining a processing mode and a PUCCH format for processing the ACK/NACK feedback information;

 Or the system pre-defining the processing mode includes: the system pre-defining a correspondence between the Un UL/DL subframe ratio and the processing mode; the method further includes: the RN according to the currently used Un UL/DL Sub-config The Un UL/DL subframe ratio in the correspondence and the correspondence relationship determine a processing mode for processing the ACK/NACK feedback information, and further determine a PUCCH format according to the determined processing mode and the ACK/NACK feedback information amount. The network side configuration indicating the processing mode includes: the network side indicates the processing mode and the PUCCH format according to the Un UL/DL subframe ratio configuration; the method further includes: determining, by the RN, the processing center according to the network side configuration indication The processing mode of the ACK/NACK feedback information and the PUCCH format;

Or the network side configuration indicating the processing mode includes: the network side indicates the processing mode according to the Un UL/DL subframe ratio configuration; the method further includes: determining, by the RN, according to the network side configuration indication, The processing mode of the ACK/NACK feedback information, and further determining the PUCCH format according to the determined processing mode and the amount of ACK/NACK feedback information. For all Un UL/DL Sub-configs, the processing mode indicated by the system pre-defined or network-side configuration is Bundling mode and/or Multiplexing mode, and the PUCCH format determined by the RN is the corresponding PUCCH format la or PUCCH format lb or channel selected PUCCH format lb. For all Un UL/DL Sub-configs, the processing mode of the system pre-defined or network-side configuration indication is cascading mode, and the PUCCH format determined by the RN is the corresponding PUCCH format la or PUCCH format lb or channel-selected PUCCH format lb or PUCCH Format 3. For Un UL/DL Sub-config #0, #1, #4, #5, #6, #13, #18, the processing mode of the system pre-defined or network-side configuration indication is Bundling mode and/or Multiplexing mode, RN The determined PUCCH format is the corresponding PUCCH format la or PUCCH format lb. For Un UL/DL Sub-config #2, #3, #7, #8, #11, #14, #15, the processing mode of the system pre-defined or network-side configuration indication is Bundling mode and/or Multiplexing mode, RN The determined PUCCH format is the corresponding PUCCH format la or PUCCH format lb or channel selected PUCCH format lb. For Un UL/DL Sub-config #9, #10, #12, #16, #17, the processing mode of the system pre-defined or network-side configuration indication is Multiplexing mode and/or cascading mode, and the PUCCH format determined by the RN is Corresponding channel selected PUCCH format lb or PUCCH format 3. For Un UL/DL Sub-config#2, #3, #7, #8, #9, #10, #11, #12, #14, #15, #16, #17, system pre-defined or network side The processing mode of the configuration indication is a multiplexing mode and/or a cascading mode, and the PUCCH format determined by the RN is a PUCCH format lb or a PUCCH format 3 of a corresponding channel selection. For any Un UL/DL subframe ratio, the processing mode of the system predefined or network side configuration indication is Bundling mode and/or Multiplexing mode, and the PUCCH format determined by the RN is the corresponding PUCCH format la or PUCCH format lb or channel selected PUCCH. Format lb. For any Un UL/DL subframe ratio, the processing mode of the system predefined or network side configuration indication is a cascading mode, and the PUCCH format determined by the RN is the corresponding PUCCH format la or PUCCH format lb or the channel selected PUCCH format lb or PUCCH. Format 3. When the Un UL/DL subframe ratio is 1:1, the processing mode indicated by the system pre-defined or network-side configuration is Bundling mode and/or Multiplexing mode, and the PUCCH format determined by the RN is the corresponding PUCCH format la or PUCCH format lb. When the Un UL/DL subframe ratio is 1:2, the processing mode indicated by the system pre-defined or network-side configuration is Bundling mode and/or Multiplexing mode, and the PUCCH format determined by the RN is the corresponding PUCCH format la or PUCCH format lb or Channel selected PUCCH format lb. When the Un UL/DL subframe ratio is 1:3 or 1:4, the processing mode indicated by the system pre-defined or network-side configuration is the Multiplexing mode and/or the cascading mode, and the PUCCH format determined by the RN is the corresponding channel selection. PUCCH format lb or PUCCH format 3. When the Un UL/DL subframe ratio is 1: 2 or 1: 3 or 1: 4, the processing mode indicated by the system pre-defined or network-side configuration is Multiplexing mode and/or cascading mode, and the PUCCH format determined by the RN is corresponding. The channel is selected in PUCCH format lb or PUCCH format 3. The steps of the system pre-defining and/or indicating the processing mode by the network side configuration include: For an Un UL/DL Sub-config or Un UL/DL subframe ratio, when the system pre-defines the Un UL/DL Sub-config or When the Un UL/DL subframe ratio corresponds to two or more processing modes, the network side further configures a processing mode for processing the ACK/NACK feedback information to be one of the two or more processing modes. Kind. The Bundling mode is: for the ACK/NACK feedback information corresponding to the downlink transmission of one or more Un DL subframes to be reported in the same Un UL subframe, the ACK/NACK feedback information is separately performed for each codeword. The "AND" operation forms a lbit or 2 bit feedback information. When the formed feedback information is 1 bit, the RN uses the PUCCH format la for bearer. When the formed feedback information is 2 bits, the PUCCH format lb is used for carrying in the RN. . The multiplexing mode refers to ACK/NACK feedback information corresponding to downlink transmission of "Un DL subframes to be reported in the same Un UL subframe:

 When "=1, the ACK/NACK feedback information is not ANDed, and when the ACK/NACK feedback information is 1 bit, the bearer is used in the RN using the PUCCH format la, when the ACK/NACK When the feedback information is 2 bits, the PUCCH format lb is used for bearing in the RN;

 When w = 2 and the downlink transmission of the backhaul link uses the dual-stream mode, the feedback information corresponding to the two codewords of each Un DL subframe in the ACK/NACK feedback information is ANDed, and the AND operation is performed. The obtained information bits are sequentially arranged in the Un DL subframe order, and are carried in the RN using the channel selected PUCCH format lb; when n=2 and the backhaul link downlink transmission uses the single stream mode, the ACK/NACK feedback is performed. The information is sequentially arranged in the order of Un DL subframes, and is carried in the RN using the PUCCH format lb of the channel selection;

^ n> 2 H, performing an AND operation on the feedback information corresponding to different codewords of each Un DL subframe in the ACK/NACK feedback information, and pressing the information bit obtained by the AND operation in the Un DL subframe order Arranged in order, and carried in the RN using the channel selected PUCCH format lb. The cascading mode refers to: ACK/NACK feedback information corresponding to downlink transmission of one or more Un DL subframes to be reported in the same Un UL subframe, in the order of the first sub-coded codeword or the first codeword The order of the subsequent subframes is sequentially arranged, and is carried in the RN using PUCCH format 1a or PUCCH format 1b or channel selected PUCCH format 1b or PUCCH format 3. In the cascading mode, when the ACK/NACK feedback information corresponding to the downlink transmission of an Un DL subframe needs to be reported in the same Un UL subframe:

 If the backhaul link uses the single stream transmission mode on the one Un DL subframe, the ACK/NACK feedback information to be reported is lbit ACK/NACK information, and is carried in the RN using the PUCCH format la;

 If the backhaul link uses the dual stream transmission mode on the one Un DL subframe, the ACK/NACK feedback information to be reported is 2 bit ACK/NACK information, and is carried in the RN using the PUCCH format lb. In the cascading mode, when the ACK/NACK feedback information corresponding to the downlink transmission of an Un DL subframe needs to be reported in the same Un UL subframe: if the backhaul link uses the dual stream on the one Un DL subframe In the transmission mode, the ACK/NACK feedback information to be reported is two code words of the downlink transmission of the Un DL subframe, 3⁄4 corresponding ACK/NACK information, ^, and the PUCCH format lb is used in the RN. Carrying; and

If the one Un DL subframe does not perform downlink transmission or the backhaul link only uses the single stream transmission mode on the one Un DL subframe, the location of the ACK/NACK feedback information to be reported is NACK. In the cascading mode, when ACK/NACK feedback information corresponding to downlink transmission of two Un DL subframes needs to be reported in the same Un UL subframe: if the backhaul link is on the two Un DL subframes The single-stream transmission mode, the ACK/NACK feedback information to be reported includes: one codeword B of the downlink transmission of the first Un DL subframe in the two Un DL subframes. The corresponding ACK/NACK information b ⁰ and the ACK/NACK information corresponding to one code word B ¹ of the downlink transmission of the second Un DL subframe are to be reported. The ACK/NACK feedback information is sequentially arranged in the Un DL subframe order, and is carried in the RN using the channel selected PUCCH format lb; if the backhaul link uses the dual stream transmission mode on the two Un DL subframes, The ACK/NACK feedback information to be reported includes two code words 3⁄4, 7 of the downlink transmission of the first Un DL subframe in the two Un DL subframes. Corresponding ACK/NACK information b ₀ ⁰ , b? , and two code words 3⁄4, 7 corresponding to the downlink transmission of the second Un DL subframe, 7 corresponding ACK/NACK information,

, 并在 RN中使用信道选择的 PUCCH格式 lb进行承载； 以及 若所述两个 Un DL子帧没有进行下行传输或在所述两个 Un DL子帧中仅 传输一个码字时， 则需上报的所述 ACK/NACK反馈信息的位置为 NACK。 在所述级联模式中，当在同一 Un UL子帧需上报 n个 Un DL子帧的下行 传输对应的 ACK/NACK反馈信息时， 其中 w > 2： 若在所述 Un DL子帧上回程链路釆用传输一个码字的单流传输方式， 则 需上报的所述 ACK/NACK反馈信息包括所述 n个 Un DL子帧中第 个 Un DL 子帧的下行传输的一个码字 对应的 ACK/NACK信息 , ≤i≤n - \ , 所 述需上报的 ACK/NACK 反馈信息被按照 Un DL 子帧顺序依次排列为 b°,b ...b"-¹ , 并在 RN中使用 PUCCH格式 3进行承载； 若在所述 Un DL子帧上回程链路釆用双流传输方式， 则需上报的所述 ACK/NACK反馈信息包括所述 n个 Un DL子帧中第 个 Un DL子帧的下行传 输的两个码字对应 7¾,7 '对应的 ACK/NACK信息 , ， 0 < i≤n - \ , 所述 需上报的 ACK/NACK 反馈信息被按照先子帧后码字的顺序依次排列为

, 或按照先码字后子 帧 的 顺序依次排列 为 b₀ ⁰,b ,..m ..,b 并在 RN中使用 PUCCH格式 3进行承载； 以及 , ΐ>»; , or 4 bit feedback information in the order of the sub-frames after the first code word

And carrying the bearer in the RN using the PUCCH format lb of the channel selection; and if the two Un DL subframes are not downlinked or only one codeword is transmitted in the two Un DL subframes, it is reported The location of the ACK/NACK feedback information is NACK. In the cascading mode, when the ACK/NACK feedback information corresponding to the downlink transmission of the n Un DL subframes needs to be reported in the same Un UL subframe, where w > 2: if the backhaul is on the Un DL subframe The ACK/NACK feedback information to be reported includes a codeword corresponding to the downlink transmission of the first Un DL subframe in the n Un DL subframes, where the link uses a single-stream transmission mode in which one codeword is transmitted. ACK/NACK information, ≤ i ≤ n - \ , the ACK/NACK feedback information to be reported is sequentially arranged in the order of Un DL subframes as b°, b ... b" - ¹ , and PUCCH is used in the RN The format 3 carries the bearer; if the backhaul link uses the dual stream transmission mode on the Un DL subframe, the ACK/NACK feedback information to be reported includes the first Un DL subframe in the n Un DL subframes. The two codewords of the downlink transmission correspond to the ACK/NACK information corresponding to 7⁄4, 7 ', and 0 < i ≤ n - \ , and the ACK/NACK feedback information to be reported is sequentially in the order of the codeword after the first subframe. Arranged as

, or sequentially arranged as b ₀ ⁰ , b , .. m .., b in the order of the first codeword after the subframe, and carried in the RN using PUCCH format 3;

If the n Un DL subframes are not downlinked or only one codeword is transmitted in the n Un DL subframes, the location of the ACK/NACK feedback information to be uplinked is NACK. The invention also provides a relay station, comprising: a system pre-defined storage module, which is set to be pre-defined by the storage system for processing to be reported

Processing mode of ACK/NACK feedback information;

 a feedback information processing reporting module, configured to: process and carry the ACK/NACK feedback information by using a processing mode stored by the system predefined storage module and a physical uplink control channel (PUCCH) format corresponding to the processing mode, And report to the network side;

 The processing mode includes one or more of the following: a Bundling mode, a Multiplexing mode, and a cascading mode;

The PUCCH format includes one or more of the following: PUCCH format la, PUCCH format lb, channel selected PUCCH format lb, and PUCCH format 3. The processing mode stored by the system predefined storage module is based on the backhaul link uplink/downlink subframe configuration (Un UL/DL Sub-config) or the back link in the Un UL/DL Sub-config uplink and downlink (Un UL/ DL) The subframe ratio is predefined, and the Un UL/DL subframe ratio in the Un UL/DL Sub-config refers to the back link uplink (Un UL) configured in the Un UL/DL Sub-config The ratio of the number of frames to the number of backhaul (Un DL) subframes. The system predefined storage module is configured to store the processing mode by: storing a correspondence between a Un UL/DL Sub-config or Un UL/DL subframe ratio and the processing mode; the feedback information The processing reporting module is further configured to: determine, according to the currently used Un UL/DL Sub-config or Un UL/DL subframe ratio and the correspondence, a processing mode for processing the ACK/NACK feedback information, and according to the The determined processing mode and the amount of ACK/NACK feedback information determine the PUCCH format. The relay station further includes a configuration indication receiving module, where the configuration indication receiving module is configured to receive a processing mode and/or a PUCCH format of the network side configuration indication; wherein, for an Un UL/DL Sub-config or Un UL/DL subframe ratio, If the Un UL/DL Sub-config or Un UL/DL subframe ratio corresponds to two or more processing modes, the processing mode of the network side configuration indication is in the two or more processing modes. One kind. The present invention further provides a communication system, the communication system comprising a base station and a relay station, wherein the base station is configured to configure a processing mode indicating that the relay station (RN) is configured to process ACK/NACK feedback information to be reported;

 The relay station is configured to: determine a PUCCH format according to a processing mode indicated by the base station configuration and an ACK/NACK feedback information amount, and process and carry the ACK/NACK feedback by using the processing mode and a physical uplink control channel (PUCCH) format. The information is reported to the network side; where the processing mode includes one or more of the following: a Bundling mode, a Multiplexing mode, and a cascading mode;

 The PUCCH format includes one or more of the following: PUCCH format la, PUCCH format lb, channel selected PUCCH format lb, and PUCCH format 3.

 The base station is configured to be configured according to a backhaul link uplink/downlink subframe configuration (Un UL/DL Sub-config) or a backlink link uplink/downlink (Un UL/DL) subframe ratio in the Un UL/DL Sub-config Instructing the processing mode, the Un UL/DL subframe ratio in the Un UL/DL Sub-config refers to a backhaul link uplink (UnUL) subframe and a backhaul chain configured in the Un UL/DL Sub-config The ratio of the number of downlink (Un DL) subframes.

The method and system of the present invention are directed to different backhaul link uplink/downlink subframe configurations (Un UL/DL Sub-config) or backhaul link up/downlinks (Un UL/DL) in Un UL/DL Sub-config The frame ratio proposes an applicable ACK/NACK feedback information processing mode, which effectively implements the RN's reporting of ACK/NACK uplink feedback information to the eNB, and fully utilizes the Backhaul link channel condition to improve the transmission efficiency of the Backhaul Link uplink feedback information. BRIEF abstract

 1 is a schematic diagram of a structure of a relay network;

 2 is a schematic diagram of a method for processing uplink ACK/NACK feedback information of a backhaul link of a TDD system according to the present invention;

 Figure 3 is a schematic diagram of a Bundling processing mode;

4 is a schematic diagram of a multiplexing processing mode; Figure 5 is a schematic diagram of a cascade processing mode. Preferred embodiment of the invention

 The present invention provides a processing method and system for uplink ACK/NACK feedback information of a backhaul link of a TDD system, for different backhaul link uplink/downlink subframe configurations (Un UL/DL Sub-config) or Un UL/ The uplink/downlink (Un UL/DL) subframe ratio of the backhaul link in the DL Sub-config proposes an applicable ACK/NACK feedback information processing mode, which provides a clear processing scheme for the uplink feedback information of the backhaul link, and effectively implements the RN pair. The ACK/NACK uplink feedback information is reported to the eNB, and the Backhaul link channel condition is fully utilized to improve the transmission efficiency of the Backhaul Link uplink feedback information.

 The network side may include one or more of the following device entities: a base station (eNB), a relay station (RN), a cell coordination entity (MCE), a gateway (GW), a mobility management device (MME), an evolved universal terrestrial wireless Access Network (EUTRAN), Operations Management and Maintenance (OAM) Manager. Only the eNB will be described as an example in the following.

 In the present invention and embodiments, the proposed method and example are only reported for the backhaul link of the TDD system.

The ACK/NACK feedback information processing method and system, and the backhaul link configuration in a single carrier (single cell) environment, does not involve the processing mode of the backhaul link in the multi-carrier configuration.

 Here, the ACK/NACK feedback information to be reported by the backhaul link refers to ACK/NACK feedback information generated by the RN for the physical downlink shared channel (PDSCH) transmitted in the Un DL subframe or for the semi-static configuration service release. (Semi-Persistent Scheduling, SPS release) ACK feedback information generated by the Physical Downlink Control Channel (PDCCH) of the message.

 The method for processing the uplink ACK/NACK feedback information of the backhaul link of the TDD system proposed by the present invention is as follows:

 Step 201: The system pre-defined and/or the network side configuration indicates a processing mode of the relay station (RN) for processing the ACK/NACK feedback information to be reported;

The system or network side according to the backhaul link uplink/downlink subframe configuration (Un UL/DL Sub-config) or Un UL/DL Sub-config backhaul link up/down (Un UL/DL) subframe ratio Make pre-defined or configuration instructions. Step 202: The RN processes the ACK/NACK feedback information by using the corresponding processing mode and the corresponding PUCCH format, and then sends the ACK/NACK feedback information to the network side.

 After the network side configuration indication or the system predefined processing mode, the RN may determine the corresponding PUCCH format according to the corresponding processing mode and the amount of ACK/NACK feedback information.

 Of course, the PUCCH can also be predefined by the network side configuration indicator or the system.

 In the present invention, the manner in which the RN determines the PUCCH format by itself is mainly described.

 The processing mode includes one or more of the following: a Bundling mode, a Multiplexing mode, and a cascading mode. The PUCCH format includes one or more of the following: PUCCH format la, PUCCH format lb, channel selected PUCCH format lb, and PUCCH format 3.

 Here, there is a fixed correspondence between the processing mode and the PUCCH format, that is, when it is determined that a certain processing mode is used, the RN can obtain the corresponding PUCCH format by combining the amount of ACK/NACK feedback information to be reported, where ACK/NACK feedback information The amount is determined by the way the backhaul link data is transmitted. When the downlink transmission of the backhaul link is in the single-stream mode, the RN generates lbit ACK/NACK feedback information for the downlink transmission of each Un DL. When the downlink transmission of the backhaul link uses the dual-stream mode, the RN downlinks for each Un DL. The transmission generates 2 bit ACK/NACK feedback information, and the RN can determine the ACK/NACK feedback information according to the downlink transmission mode of the backhaul link, and combined with the ACK/NACK processing mode that should be used, the PUCCH format used can be determined accordingly.

 Here, Un UL/DL Sub-config is shown in Table 3. #0 - #18 A total of 19 different backhaul link subframe configurations, also known as Un subframe configuration. The Un subframe configuration indicates that the RN indicates the corresponding uplink and downlink subframes for the uplink and downlink data transmission on the backhaul link. Correspondingly, the Un UL/DL subframe ratio is the ratio of the Un UL subframe to the Un DL subframe configured in the Un UL/DL Sub-config.

 The system can be divided into the following three cases according to the Un UL/DL Sub-config pre-defined or the network side according to the Un UL/DL Sub-config configuration instructions:

Case A: When the system pre-defines the correspondence between each Un UL/DL Sub-config and the feedback information processing mode and the PUCCH format, each Un UL/DL Sub-config may correspond to Bundling, Multiplexing, cascading One or more of the three processing modes. RN based on current Using the Un UL/DL Sub-config and the predefined correspondence, obtaining a mode for processing ACK/NACK information and a corresponding PUCCH format, and processing the ACK/NACK feedback information to be reported using the corresponding mode and PUCCH format, Report to the network side.

 Or, the system pre-defines a correspondence between each Un UL/DL Sub-config and the processing mode, and the RN determines ACK/NACK feedback according to the currently used Un UL/DL Sub-config and the predefined correspondence. The processing mode of the information is further determined according to the processing mode and the ACK/NACK feedback information amount, and the ACK/NACK feedback information to be reported is processed by the corresponding processing mode and the corresponding PUCCH format, and reported to the network side. See Example 1 for details.

 Case B: On the basis of Case A, when the system pre-defines more than one processing mode for a certain Un UL/DL Sub-config, the network side may further configure the indication RN through the high-level signaling. The ACK/NACK information to be reported is processed by the RN according to the indicated processing mode and the corresponding PUCCH format, and the RN reports the ACK/NACK feedback information to be reported to the network side. See examples 2, 3 for details.

 Case C: The Un UL/DL Sub-config used by the network side according to the backhaul link indicates that the RN uses one of the three processing modes Bundling, Multiplexing, and cascading, and the PUCCH format to process ACK/NACK information, RN The ACK/NACK feedback information to be reported is processed according to the processing mode of the configuration indication and the corresponding PUCCH format, and reported to the network side;

 Or, the network side indicates the processing mode of the RN according to the back link Un UL/DL Sub-config configuration, and the RN determines the processing mode of the ACK/NACK feedback information according to the configuration indication, and further, according to the processing mode and the ACK/NACK feedback information amount. Determine the PUCCH format and use the corresponding processing. See Example 6 for details.

 The specific implementation schemes for the above three cases (A, B, C) include the following:

 For all Un UL/DL Sub-configs, the system pre-defines or the network side configuration indicates that the RN uses the Bundling and/or Multiplexing mode to process ACK/NACK feedback information, and the RN uses the ACK/NACK feedback information in the corresponding processing mode and PUCCH format. La or lb or channel selected lb bearer. See Example 3 for a specific example.

Or, for all Un UL/DL Sub-configs, the system is predefined or configured by the network side The RN processes the ACK/NACK feedback information in a cascading mode, and the RN carries the ACK/NACK feedback information in a corresponding processing mode and PUCCH format la or lb or channel selected lb or format 3.

 Or, for Un UL/DL Sub-config #0, #1, #4, #5, #6, #13, #18, the system is predefined or configured by the network side to indicate that the RN is processed in Bundling and/or Multiplexing mode. ACK/NACK feedback information, the RN carries the ACK/NACK feedback information in the corresponding processing mode and PUCCH format la or lb; for Un UL/DL Sub-config #2, #3, #7, #8, #11, # 14, #15, the system is predefined or indicated by the network side to indicate that the RN uses the Bundling and/or Multiplexing mode to process the ACK/NACK feedback information, and the RN uses the ACK/NACK feedback information in the corresponding processing mode and the PUCCH format la or lb or channel. The selected lb bearer; for Un UL/DL Sub-config#9, #10, #12, #16, #17, the system is predefined or the network side configuration indicates that the RN uses the cascading mode to process ACK/NACK feedback information, The RN carries the ACK/NACK feedback information in the corresponding processing mode and PUCCH format 3. See Example 1 for a specific example.

 Or, for Un UL/DL Sub-config #0, #1, #4, #5, #6, #13, #18, the system is predefined or configured by the network side to indicate that the RN is processed in Bundling and/or Multiplexing mode. ACK/NACK feedback information, the RN carries the ACK/NACK feedback information in the corresponding processing mode and PUCCH format la or lb; for Un UL/DL Sub-config#2, #3, #7, #8, #9, # 10, #11, #12, #14, #15, #16, #17, The system is predefined or indicated by the network side to indicate that the RN handles ACK/NACK feedback information in Multiplexing and/or cascading mode, and the RN will ACK/ The NACK feedback information is carried in the corresponding processing mode and channel selected lb or PUCCH format 3. See Example 2 for a specific example.

Or, for Un UL/DL Sub-config #0, #1, #4, #5, #6, #13, #18, the system is predefined or configured by the network side to indicate that the RN is processed in Bundling and/or Multiplexing mode. ACK/NACK feedback information, the RN carries the ACK/NACK feedback information in the corresponding processing mode and PUCCH format la or lb; for Un UL/DL Sub-config #2, #3, #7, #8, #11, # 14, #15, the system is predefined or indicated by the network side to indicate that the RN uses the Bundling and/or Multiplexing mode to process the ACK/NACK feedback information, and the RN uses the ACK/NACK feedback information in the corresponding processing mode and the PUCCH format la or lb or channel. Selected lb bearer; for Un UL/DL Sub-config#9, #10, #12, #16, #17, system predefined or by network side configuration indication RN multiplexed with multiplex/ and cascading mode ACK/ NACK feedback information, RN will ACK/NACK The feedback information is carried in the corresponding processing mode and channel selected lb or PUCCH format 3.

 The system is pre-defined according to the Un UL/DL subframe ratio or the network side according to the Un UL/DL subframe ratio configuration indication can be divided into the following three situations:

 Case 1. When the system pre-defines the correspondence between different Un UL/DL subframe ratios and the feedback information processing mode and the PUCCH format, each Un UL/DL subframe ratio may correspond to Bundling, Multiplexing, and Cascade respectively. One or more of the processing modes. The RN obtains a mode for processing ACK/NACK information and a corresponding PUCCH format according to the Un UL/DL subframe ratio in the currently used Un UL/DL Sub-config and the predefined correspondence, and uses the corresponding or system. Predefining the correspondence between different Un UL/DL subframe ratios and processing modes,

The RN determines a processing mode of the ACK/NACK feedback information according to the Un UL/DL subframe ratio in the currently used Un UL/DL Sub-config and the predefined correspondence, and further, according to the processing mode and the ACK/NACK feedback information. The quantity is determined by the PUCCH format, and the ACK/NACK feedback information to be reported is processed by the corresponding processing mode and the PUCCH format, and reported to the network side. See Example 4 for a specific example.

 Scenario 2. On the basis of Case 1, when the system pre-defines more than one processing mode for a certain Un UL/DL subframe ratio, the network side may further configure the indication RN through the high-level signaling. The ACK/NACK information to be reported is processed by the RN according to the indicated processing mode and the corresponding PUCCH format, and the RN reports the ACK/NACK feedback information to be reported to the network side. See Examples 5 and 8 for specific examples.

 Case 3: The network side configures, according to the proportion of Un UL/DL subframes used by the backhaul link, the RN to process the ACK/NACK information by using one of the three processing modes of Bundling, Multiplexing, and cascading, and the PUCCH format. The RN processes the ACK/NACK feedback information to be reported according to the processing mode of the configuration indication and the corresponding PUCCH format, and reports the information to the network side.

 Or the network side configures the RN processing mode according to the proportion of the Un UL/DL subframe of the backhaul link,

The RN determines a processing mode of the ACK/NACK feedback information according to the configuration indication, and further determines a PUCCH format according to the processing mode and the ACK/NACK feedback information amount. See Example 7 for a specific example.

The specific implementation schemes for the above three cases (1-3) include the following: For any Un UL/DL subframe ratio, the system pre-defines or indicates by the network side that the RN uses the Bundling and/or Multiplexing mode to process ACK/NACK feedback information, and the RN uses the ACK/NACK feedback information in the corresponding processing mode and PUCCH format. La or lb or channel selected lb bearer.

 Or, for any Un UL/DL subframe ratio, the system is predefined or configured by the network side.

The RN uses the cascading mode to process the ACK/NACK feedback information, as well as the lb or format 3 of the PUCCH format la or lb or channel selection.

 Or, when the Un UL/DL subframe ratio is 1:1, the system pre-defines or is configured by the network side to indicate that the RN processes the ACK/NACK feedback information in the Bundling and/or Multiplexing mode, and the RN sends the ACK/NACK feedback information accordingly. Processing mode and PUCCH format la or lb bearer; when the Un UL/DL subframe ratio is 1: 2, the system pre-defines or the network side configuration indicates that the RN uses the Bundling and/or Multiplexing mode to process the ACK/NACK feedback information, The RN carries the ACK/NACK feedback information in the corresponding processing mode and the lb of the PUCCH format la or lb or channel selection; when the Un UL/DL subframe ratio is 1:3 or 1:4, the system is predefined or by the network side. The configuration indication RN uses the cascading mode to process the ACK/NACK feedback information, and the RN carries the ACK/NACK feedback information in the corresponding processing mode and PUCCH format 3. See Examples 5 and 7 for specific examples.

 Or, when the Un UL/DL subframe ratio is 1:1, the system pre-defines or is configured by the network side to indicate that the RN processes the ACK/NACK feedback information in the Bundling and/or Multiplexing mode, and the RN sends the ACK/NACK feedback information accordingly. Processing mode and PUCCH format la or lb bearer; when the Un UL/DL subframe ratio is 1: 2 or 1: 3 or 1: 4, the system is predefined or indicated by the network side to indicate that the RN uses Multiplexing and/or In association mode, the ACK/NACK feedback information is processed, and the RN carries the ACK/NACK feedback information in the corresponding processing mode and channel selected lb or PUCCH format 3. See Example 4 for a specific example.

Or, when the Un UL/DL subframe ratio is 1:1, the system pre-defines or is configured by the network side to indicate that the RN processes the ACK/NACK feedback information in the Bundling and/or Multiplexing mode, and the RN sends the ACK/NACK feedback information accordingly. Processing mode and PUCCH format la or lb bearer; when the Un UL/DL subframe ratio is 1: 2, the system pre-defines or the network side configuration indicates that the RN uses the Bundling and/or Multiplexing mode to process the ACK/NACK feedback information, The RN carries the ACK/NACK feedback information in a corresponding processing mode and a PUCCH format la or lb or a channel selected lb; When the Un UL/DL subframe ratio is 1:3 or 1:4, the system pre-defines or the network side configuration indicates that the RN uses the Multiplexing and/or cascading mode to process ACK/NACK feedback information, and the RN feeds back ACK/NACK feedback. The information is carried in the corresponding processing mode and channel selected lb or PUCCH format 3. See Example 8 for a specific example.

 Here, the Bundling, Multiplexing, and cascading processing modes are respectively:

 The Bundling mode is: performing downlink and corresponding ACK/NACK information for one or more Un DL subframes to be reported in the same Un UL subframe, and performing "AND" on the feedback information corresponding to the multiple Un DL subframes by using a codeword. Operation, forming 1 or 2 bit information, as shown in FIG. 3, is further processed using the PUCCH format la or lb.

 Wherein, when the same Un UL subframe only needs to report an Un DL subframe, the downlink transmission corresponds to

When the ACK/NACK feedback information is sent, the Bundling process does not perform an AND operation on the ACK/NACK feedback information of the Un DL subframe, and the 1 or 2 bit feedback information of the Un DL subframe is processed and carried in the PUCCH format la or lb.

 The RN uses the PUCCH format la bearer when the feedback information after the Bundling processing is lbit. When the feedback information is 2 bits, the RN carries the PUCCH format lb.

 Multiplexing mode: ACK/NACK information corresponding to downlink transmission of one or more Un DL subframes to be reported in the same Un UL subframe, corresponding to different codewords of each Un DL subframe in multiple Un DL subframes The feedback information is subjected to an AND operation, that is, spatial bundling across multiple codewords processing, and the information bits after the "AND" operation are sequentially arranged in the order of Un DL sub-frames, as shown in FIG. The processing bearer is further processed using the PUCCH format la or lb or the channel selected PUCCH format lb.

 When the same Un UL subframe only needs to transmit ACK/NACK feedback information corresponding to downlink transmission of an Un DL subframe, the multiplexing processing does not perform an AND operation on the ACK/NACK feedback information corresponding to the Un DL subframe. The 1 or 2 bit feedback information of the Un DL subframe is directly processed and carried in the PUCCH format la or lb. When the feedback information is lbit, the PUCCH format la is used accordingly, and when the feedback information is 2 bits, the PUCCH format lb is used accordingly.

Wherein, when the same Un UL subframe needs to report the ACK/NACK feedback information corresponding to the downlink transmission of the two Un DL subframes and the downlink transmission of the backhaul link uses the dual stream mode, the Multiplexing The mode performs an AND operation on the feedback information corresponding to the two codewords of the Un DL subframe, and sequentially arranges the information bits after the AND operation in the Un DL subframe order, and further uses the channel selection PUCCH format lb. When the downlink transmission of the backhaul link uses the single-stream mode, in the multiplexing processing mode, the ACK/NACK feedback information transmitted by the two Un DL subframes is sequentially arranged in the Un DL subframe order, and the PUCCH format using the channel selection is used. Lb is processed to carry. In addition, there are two ways to use the LTE Release 8 mapping relationship or the LTE Release 10 mapping relationship, which may be predefined by the system or by a high-level, for the mapping between the feedback information used by the Multiplexing processing mode and the used PUCCH resources. The signaling configuration indicates the RN.

 Cascading mode: For the ACK/NACK information of the downlink transmission of one or more Un DL subframes to be reported in the same Un UL subframe, the sequence of the codewords after the first subframe or the subframes of the first codeword are sequentially arranged. |J, as shown in FIG. 5, the PUCCH format lb or PUCCH format 3 is further used for processing bearer using the PUCCH format la or lb or channel selection.

When the ACK/NACK information corresponding to the downlink transmission of an Un DL subframe is to be reported in the same Un UL subframe, if the backhaul link is used in the Un DL subframe, the single-stream transmission mode is used, that is, one codeword is transmitted. The cascading mode processing further processes the corresponding lbit ACK/NACK information by using the PUCCH format la; if the backhaul link uses the dual stream transmission mode on the Un DL subframe, that is, when transmitting two codewords, the level is The joint mode processing will be the corresponding 2bit ACK/NACK information ^b . A, further processing the bearer using the PUCCH format lb.

Or, when the ACK/NACK information corresponding to the downlink transmission of an Un DL subframe is reported in the same Un UL subframe, the 2-bit feedback information obtained by the cascading mode processing is respectively two codewords transmitted in the downlink of the Un DL subframe. Corresponding feedback information, ie TB. , t ACK/NACK information ^b . A, further processing the bearer by using the PUCCH format lb; when the Un DL subframe is not downlinked or only uses the single stream transmission mode, the corresponding feedback information location is NACK.

When the ACK/NACK information corresponding to the downlink transmission of the two Un DL subframes is to be reported in the same Un UL subframe, if the backhaul link is used in the Un DL subframe, the single-stream transmission mode is used, that is, one code is transmitted. In the case of a word, the feedback information corresponding to one codeword transmitted in the downlink of the first Un DL subframe, that is, the ACK/NACK information corresponding to TB ⁰ is b ⁰ , and the one codeword corresponding to the downlink transmission of the second Un DL subframe corresponds to The feedback information, that is, the ACK/NACK information corresponding to 7B ¹ is, the cascading mode processing sequentially aligns the ACK/NACK feedback information transmitted by the two Un DL subframes in the Un DL subframe order. That is, the PUCCH format lb of the channel selection is used for processing bearer; if the backhaul link uses the dual stream transmission mode on the Un DL subframe, the feedback information corresponding to the two codewords transmitted in the downlink of the first Un DL subframe, That is, the ACK/NACK information corresponding to 3⁄4, ΤΒ° is , and the feedback information corresponding to the two codewords transmitted in the downlink of the second Un DL subframe, that is, the ACK/NACK information corresponding to 3⁄4,7 is , , cascading mode Processing the obtained 4-bit feedback b ₀ ° , b in the order of the codewords after the first subframe, and further processing the bearer using the PUCCH format lb of the channel selection, when the Un DL subframe does not perform downlink transmission or only transmits one code When the word is used, the corresponding feedback information position is NACK. In addition, when the cascading processing mode corresponds to the PUCCH format lb for channel selection, the mapping relationship between the feedback information and the used PUCCH resource may be used in two ways, and an LTE Release 8 mapping relationship may be used, or an LTE Release 10 mapping relationship may be used. Specifically, the RN may be predefined by the system or configured by a high layer signaling.

When the ACK/NACK information corresponding to the downlink transmission of the n Un DL subframes is to be reported in the same Un UL subframe, "> ² , if the backhaul link is used in the UnDL subframe, the single stream transmission mode is used. When transmitting a codeword, the feedback information corresponding to one codeword transmitted in the downlink of the ⁷ ' Un DL subframe, 0≤ ≤"_1, that is, the ACK/NACK information corresponding to 7' is, the cascade mode processing will be n The ACK/NACK feedback information of the Un DL subframe transmission is sequentially arranged in the Un DL subframe order to obtain the nbit feedback information as 6 j" ^-1 , and further processed using the PUCCH format 3; if the backhaul is on the Un DL subframe The link uses dual-stream transmission mode, and the feedback information corresponding to two codewords transmitted in the downlink of the ^7th Un DL subframe, 0<i≤fj_l, that is, 3⁄4, 7Ή; 'the corresponding ACK/NACK information is, The cascading mode processes the 2*«bit feedback information obtained by sequentially arranging the codewords in the first sub-frame to be m K br ¹ , or the 2*«bit feedback information sequentially arranged in the order of the sub-frames of the first codeword. is ..A "- ^1, d ... 3 further processed using PUCCH format bearer, when the downlink transmission Un DL subframes no or only pass When one codeword, the corresponding feedback information of the position of NACK.

Embodiments of the invention are described in detail below. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. Example 1 The system pre-defines the correspondence between the Un UL/DL Sub-config and the feedback information processing mode, as shown in Table 4.

 Table 4 TDD Un UL/DL Sub-config and ACK/NACK processing mode relationship

 If the backhaul link uses Un UL/DL Sub-config#6, the RN obtains the ACK/NACK information in the Bundling and Multiplexing mode according to the predefined correspondence shown in Table 4 of the currently used Un UL/DL Sub-config, and the eNB The RN is further instructed by higher layer signaling to process ACK/NACK information using the Multiplexing mode. On the Un DL subframe, the eNB uses the single-stream transmission mode for the downlink data of the RN, and the RN uses the Multiplexing mode to process, and the corresponding 1 bit ACK/NACK feedback information is mapped in the PUCCH format la bearer and reported to the eNB.

 The backhaul link uses Un UL/DL Sub-config#10, then the RN is based on the currently used Un.

The UL/DL Sub-config obtains the ACK/NACK information in cascading mode in the predefined correspondence shown in Table 4. On the Un DL subframe, the eNB uses the dual-stream transmission mode for the downlink data of the RN, and the RN processes the ACK/NACK information in the cascade mode, and the downlink transmission on the Un DL subframes #3, #8, #9 is corresponding. The 6-bit feedback information obtained by sequentially arranging the feedback information in the order of the first sub-frame codeword is , , ² , 6 ₁ ² , and the RN maps the information processed in the concatenated mode to the PUCCH format 3 bearer, and then advertises to the eNB.

Example 2

 The system pre-defines the correspondence between Un UL/DL Sub-config and feedback information processing mode, as shown in Table 5.

 Table 5 Relationship between TDD Un UL/DL Sub-config and ACK/NACK processing mode

The back link uses Un UL/DL Sub-config#4, then the RN is based on the currently used Un UL/DL The predefined correspondence shown in Sub-config Table 5 is obtained to process ACK/NACK information in the Bundling and Multiplexing modes, and the eNB further instructs the RN through higher layer signaling to process the ACK/NACK information using the Bundling mode. On the Un DL subframe, the eNB uses the dual-stream transmission mode for the downlink data of the RN, and the RN uses the Bundling mode to process, and the corresponding 2-bit ACK/NACK feedback information is mapped in the PUCCH format lb and reported to the eNB.

 The backhaul link uses Un UL/DL Sub-config#8, and the RN obtains the ACK/NACK information in the cascade mode according to the predefined relationship shown in Table 5 according to the currently used Un UL/DL Sub-config. On the Un DL subframe, the eNB uses the dual-stream transmission mode for the downlink data of the RN, and the RN processes the ACK/NACK information in the cascading mode, and presses the corresponding feedback information of the downlink transmission on the Un DL subframes #3 and #9. The 4 bit feedback information obtained by sequentially arranging the codewords in the first sub-frame is blb blb], and the RN maps the information processed in the concatenated mode to the PUCCH format 3 bearer, and then advertises on the Un UL sub-frame #7 to the eNB. Example 3

 The system is pre-defined to handle all Un UL/DL Sub-configs in Bundling or Multiplexing mode.

The backhaul link uses Un UL/DL Sub-config #17, and the eNB further instructs the RN through higher layer signaling to process the ACK/NACK information using the Multiplexing mode, and the RN processes the ACK/NACK information in the Multiplexing mode according to the configuration indication. On Un DL subframes #4, #7, #8, #9, the eNB performs downlink data transmission on the RN using the single stream transmission mode, and the RN uses the Multiplexing mode to process, , , ² and ³ are Un DL subframes respectively. #4, #7, #8, #9 downlink transmission corresponding feedback information, the RN further maps the feedback information, ² , ³ in the PUCCH format lb of the channel selection, and reports to the eNB. Example 4

 When the ratio of Un UL/DL subframe is 1: 1 , the uplink ACK/NACK feedback information of the backhaul link is processed in Bundling mode. When other ratios are used, the cascading mode is used.

The backhaul link uses Un UL/DL Sub-config# 1 , where the Un UL/DL subframe ratio is 1: 1 . The RN processes the ACK/NACK information in the Bundling mode according to the predefined rules of the system. In the Un DL subframe, the eNB uses the dual stream transmission mode for the downlink data of the RN, and the RN uses the Bundling mode to process the corresponding 2 bit ACK/ The NACK feedback information is mapped in the PUCCH format lb, and is sent to the eNB.

 The backhaul link uses Un UL/DL Sub-config# 10 , where the Un UL/DL subframe ratio is 1:

其中， 由于单流传输， 为 NACK, RN将级联模式处 理后的信息以 PUCCH格式 3承载映射， 向 eNB上报。 实施例 5 3, according to the system predefined rules, the RN uses the cascading mode to process the ACK/NACK feedback information. On the Un DL subframe, the eNB uses the single-stream transmission mode for the downlink data of the RN, and the RN processes the ACK/NACK information in the cascade mode, and the downlink transmission on the Un DL subframes #3, #8, #9 is corresponding. The feedback information is sequentially arranged in the order of the codewords after the first sub-frame, and the 6-bit feedback information is

The RN processes the information processed by the cascading mode in the PUCCH format 3 bearer and reports to the eNB. Example 5

 The system pre-defines the ACK/NACK feedback information of the backhaul link in the Bundling and Multiplexing mode when the ratio of Un UL/DL subframe is 1: 1 or 1: 2, and the cascading mode is used when other ratio values are used.

 The backhaul link uses Un UL/DL Sub-config#l 1 , where the Un UL/DL subframe ratio is 1:

2, the RN processes the ACK/NACK information in the Bundling and Multiplexing modes according to the system predefined rules. Further, the eNB instructs the RN to process the ACK/NACK information in the Multiplexing mode through the high layer signaling configuration. Here, when the system pre-defined multiplexing mode is 2, the ACK/NACK feedback information is not subjected to spatial bundling processing between code words. On the Un DL subframes #7 and #9, the eNB performs downlink data transmission on the RN using the dual stream transmission mode, and the RN uses the Multiplexing mode to process, b ₀ ⁰ , b? , , respectively, Un DL subframe #7, # 9 downlink transmission correspondingly generated feedback information, the RN further maps the feedback information, and is mapped to the eNB by the bearer mapping of the PUCCH format lb of the channel selection.

 The backhaul link uses Un UL/DL Sub-config#17 , where the Un UL/DL subframe ratio is 1:

, RN将级联模式处理后的信息以 PUCCH格式 3承载映 射， 向 eNB上才艮。 实施例 6 4, according to the system predefined rules, the ACK/NACK feedback information is processed in the cascade mode. On the Un DL subframe, the eNB uses the dual-stream transmission mode for the downlink data of the RN, and the RN processes the ACK/NACK information in the cascade mode, and will downlink on the Un DL subframes #4, #7, #8, #9. Transfer corresponding The feedback information is sequentially arranged in the order of the codewords after the first sub-frame, and the 8-bit feedback information is

The RN maps the information processed by the cascading mode to the eNB on the PUCCH format 3 bearer. Example 6

 The eNB uses the Un UL/DL Sub-config configuration indication according to the backhaul link. The RN uses one of three processing modes, Bundling, Multiplexing, and Cascading, to process ACK/NACK information.

 The backhaul link uses Un UL/DL Sub-config #0, and the eNB configuration indicates that the RN processes the ACK/NACK information in the cascading mode. On the Un DL subframe, the eNB uses the single-stream transmission mode for the downlink data of the RN, and the RN The configuration indication is performed by using the cascading mode processing to map the corresponding lbit ACK/NACK feedback information to the eNB in the PUCCH format.

 The backhaul link uses Un UL/DL Sub-config #9, and the eNB configuration indicates that the RN processes the ACK/NACK information in the Bundling mode, and the RN maps the information processed in the Bundling mode to the eNB in the PUCCH format lb according to the indication. Example 7

 The eNB configures the RN to use one of the three processing modes of Bundling, Multiplexing, and Cascade to process the ACK/NACK information according to the Un UL/DL subframe ratio of the backhaul link, and the ratio of the Un UL/DL subframe is 1: 1 or 1: 2, the uplink ACK/NACK feedback information of the backhaul link is processed in the Multiplexing mode. When other ratio values are used, the cascading mode is used.

, 相同子帧的 2bit反馈信息进行 "与" 操作， 最终的反馈信息按子帧顺序表示为 ， b₀ = , RN将 , 以 LTE 映射关系选择相应的 PUCCH信道资源， 以信道选择的 PUCCH格式 lb承载映射， 向 eNB上报。 The backhaul link uses Un UL/DL Sub-config#8, where the Un UL/DL subframe ratio is 1:2, and the eNB configuration instructs the RN to process ACK/NACK information in the Multiplexing mode, where the system pre-defined the Multiplexing mode at " When the value is 2, the ACK/NACK feedback information is subjected to the spatial bundling process between the code words. On the Un DL subframes #3 and #9, the eNB performs the downlink data transmission on the RN using the dual stream transmission mode, and the RN uses the Multiplexing mode to process. Un DL subframe #3, #9 downlink transmission corresponding generated 4-bit feedback information is

The 2 bit feedback information of the same subframe is subjected to an AND operation, and the final feedback information is expressed in a sub-frame order, b ₀ = , The RN will select the corresponding PUCCH channel resource in the LTE mapping relationship, and carry the mapping in the PUCCH format lb of the channel selection, and report it to the eNB.

 The backhaul link uses UnUL/DL Sub-config#12, where the UnUL/DL subframe ratio is 1:

3. The eNB configuration indicates that the RN processes the ACK/NACK information in a cascade mode. On the Un DL subframe, the eNB uses the dual-stream transmission mode for the downlink data of the RN, and the RN processes the ACK/NACK information in the cascade mode, and transmits the corresponding feedback on the downlink transmission on the UnDL subframes #7, #8, #9. The information obtained by arranging the information in the cascading mode is mapped to the PUCCH format 3 and is reported to the eNB on the UnUL subframe #3. Example 8

 The system pre-defined for the Un UL/DL subframe ratio is 1: 1 or 1: 2, the backlink link uplink ACK/NACK feedback information is processed in Bundling and Multiplexing mode, and the Un UL/DL subframe ratio is 1: 3 or 1. : 4, 处理 Processing with Multiplexing and Cascade mode.

The backhaul link uses Un UL/DL Sub-config#l 1 , where the Un UL/DL subframe ratio is 1: 2, then the RN processes the ACK/NACK information in Bundling and Multiplexing modes according to the system predefined rules. The eNB instructs the RN to process the ACK/NACK information in the Multiplexing mode through the high layer signaling configuration. Here, when the system pre-defined multiplexing mode is 2, the ACK/NACK feedback information is not subjected to spatial bundling processing between code words. On the Un DL subframes #7 and #9, the eNB performs downlink data transmission on the RN using the dual stream transmission mode, and the RN uses the Multiplexing mode to process, b ₀ ⁰ , b? , , respectively, Un DL subframe #7, # 9 downlink transmission correspondingly generated feedback information, the RN further maps the feedback information, and is mapped to the eNB by the bearer mapping of the PUCCH format lb of the channel selection.

 The backhaul link uses UnUL/DL Sub-config#l 7, where the UnUL/DL subframe ratio is 1:

4, according to the system predefined rules, the multiplex/cascade mode is used to process the ACK/NACK feedback information. Further, the eNB performs the high-level signaling configuration indication that the RN processes in the cascade mode.

ACK/NACK information. On the Un DL subframe, the eNB uses the dual-stream transmission mode for the downlink data of the RN, and the RN processes the ACK/NACK information in the cascade mode, and transmits the downlink transmission on the UnDL subframes #4, #7, #8, #9. The corresponding feedback information is sequentially arranged in the order of the first sub-frame codeword, and the 8 bit feedback information is ² A ² , ³ , , and the RN processes the information in the cascade mode as PUCCH. The bearer mapping of the formula 3 is reported to the eNB.

In order to implement the above method, the present invention provides a relay station, where the relay station includes: a system predefined storage module configured to store a processing mode predefined by the system for processing ACK/NACK feedback information to be reported;

 a feedback information processing and reporting module, configured to process and transmit the ACK/NACK feedback information to the network side according to the storage information of the system predefined storage module, using a corresponding processing mode and a corresponding PUCCH format;

 The processing mode includes one or more of the following: a Bundling mode, a Multiplexing mode, and a cascading mode;

 The PUCCH format includes one or more of the following: PUCCH format la, PUCCH format lb, channel selected PUCCH format lb, and PUCCH format 3.

 Further, the information stored by the system predefined storage module is based on a backhaul link uplink/downlink subframe configuration (Un UL/DL Sub-config) or a back link in the Un UL/DL Sub-config uplink and downlink (Un The UL/DL) subframe ratio is predefined, and the Un UL/DL subframe ratio in the Un UL/DL Sub-config refers to the backhaul link uplink configured in the Un UL/DL Sub-config (Un UL The ratio of the number of subframes to the number of backhaul (Un DL) subframes.

 Further, the system pre-defined storage module stores a correspondence between each Un UL/DL Sub-config or a different Un UL/DL subframe ratio and the processing mode, and the feedback information processing reporting module is further configured to: The currently used Un UL/DL Sub-config or Un UL/DL subframe ratio and the predefined correspondence relationship, determining a corresponding processing mode of the ACK/NACK feedback information, and further, according to the processing mode and the ACK/NACK feedback information amount Determine the PUCCH format.

 Further, the relay station further includes a configuration indication receiving module configured to receive a processing mode and/or a PUCCH format of the configuration indication of the network side, where the information stored by the system predefined storage module indicates a certain Un UL/DL When the Sub-config or Un UL/DL subframe ratio corresponds to two or more processing modes, the processing mode indicated by the network side configuration is one of two or more processing modes predefined by the system.

In addition, the present invention also provides a communication system including a base station and a relay station. among them,

 The base station is configured to configure a processing mode indicating that the relay station (RN) is configured to process the ACK/NACK feedback information to be reported;

 The relay station is configured to: determine a PUCCH format according to the processing mode indicated by the base station configuration and the ACK/NACK feedback information amount, and process and carry the ACK/NACK feedback information to the network by using a corresponding processing mode and a corresponding PUCCH format. Side report;

 The processing mode includes one or more of the following: a Bundling mode, a Multiplexing mode, and a cascading mode;

 The PUCCH format includes one or more of the following: PUCCH format la, PUCCH format lb, channel selected PUCCH format lb, and PUCCH format 3.

 Further, the base station performs according to a backhaul link uplink/downlink subframe configuration (Un UL/DL Sub-config) or a back link uplink/downlink (Un UL/DL) subframe ratio in the Un UL/DL Sub-config. The configuration indication indicates that the Un UL/DL subframe ratio in the Un UL/DL Sub-config refers to a backhaul link uplink (Un UL) subframe and a backhaul link downlink configured in the Un UL/DL Sub-config ( Un DL ) The ratio of the number of sub-frames.

It is to be understood that the various solutions and embodiments described above are equally applicable to the above relay stations and systems, and are not described herein again.

 One of ordinary skill in the art will appreciate that all or a portion of the above steps may be accomplished by a program instructing the associated hardware, such as a read-only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module in the foregoing embodiment may be implemented in the form of hardware, or may be implemented in the form of a software function module. The invention is not limited to any specific combination of hardware and software.

Industrial applicability

Compared with the prior art, the present invention is directed to different backhaul link uplink/downlink subframe configurations (Un UL/DL Sub-config) or Un UL/DL Sub-config backhaul links up/down (Un UL/ DL) The subframe ratio proposes an applicable ACK/NACK feedback information processing mode, which effectively implements the RN's uplink/backlink feedback information to the eNB, and fully utilizes the Backhaul link channel condition, thereby improving the transmission of Backhaul Link uplink feedback information. effectiveness.

Claims

Claim 1. A method for processing uplink feedback information of a backhaul link in a time division duplex (TDD) system, including:  The system pre-defined and/or configured by the network side to indicate a processing mode used by the relay station (RN) to process the ACK/NACK feedback information to be reported;  The RN processes and carries the ACK/NACK feedback information to the network side by using the processing mode and a physical uplink control channel (PUCCH) format corresponding to the processing mode, where the processing mode is reported to the network side; Multiple types: Bundling mode, Multiplexing mode, and cascading mode;  The PUCCH format includes one or more of the following: PUCCH format la, PUCCH format lb, channel selected PUCCH format lb, and PUCCH format 3. 2. The method according to claim 1, wherein the system or network side is configured according to a backhaul link uplink/downlink subframe configuration (Un UL/DL Sub-config) or a backhaul chain in Un UL/DL Sub-config The on-road downlink (Un UL/DL) subframe ratio is predefined or configured to indicate the processing mode, and the Un UL/DL subframe ratio in the Un UL/DL Sub-config refers to the Un UL/DL Sub-config The ratio of the backhaul link uplink (Un UL) subframe to the number of backhaul link downlink (Un DL) subframes configured. 3. The method according to claim 1, wherein the step of the system predefining the processing mode comprises: the system pre-defining a correspondence between the Un UL/DL Sub-config and the processing mode and the PUCCH format; The method includes: the RN determining, according to the currently used Un UL/DL Sub-config and the corresponding relationship, a processing mode and a PUCCH format for processing the ACK/NACK feedback information; or  The system pre-defining the processing mode includes: the system pre-defines a correspondence between the Un UL/DL Sub-config and the processing mode; the method further includes: the RN according to the currently used Un UL/DL Sub-config and the Determining a correspondence, determining a processing mode for processing the ACK/NACK feedback information, and further determining a PUCCH format according to the determined processing mode and the ACK/NACK feedback information amount. 4. The method of claim 1, wherein the network side configures the step of indicating the processing mode The method includes: the network side indicating the processing mode and the PUCCH format according to the Un UL/DL Sub-config configuration; the method further includes: determining, by the RN, a processing mode for processing the ACK/NACK feedback information according to the configuration indication of the network side And PUCCH format;  Or the network side configuration indicating the processing mode includes: the network side indicating the processing mode according to the Un UL/DL Sub-config configuration, the method further includes: determining, by the RN, according to the network side configuration indication, The processing mode of the ACK/NACK feedback information, and further determining the PUCCH format according to the determined processing mode and the amount of ACK/NACK feedback information. 5. The method according to claim 1, wherein the step of the system predefining the processing mode comprises: a system pre-defining a correspondence between a Un UL/DL subframe ratio and a processing mode and a PUCCH format; The method includes: determining, by the RN, a processing mode and a PUCCH format for processing the ACK/NACK feedback information according to an Un UL/DL subframe ratio in the currently used Un UL/DL Sub-config and the correspondence relationship;  Or the system pre-defining the processing mode includes: the system pre-defining a correspondence between the Un UL/DL subframe ratio and the processing mode; the method further includes: the RN according to the currently used Un UL/DL Sub-config The Un UL/DL subframe ratio in the correspondence and the correspondence relationship determine a processing mode for processing the ACK/NACK feedback information, and further determine a PUCCH format according to the determined processing mode and the ACK/NACK feedback information amount. The method of claim 1, wherein the step of the network side configuration indicating the processing mode comprises: the network side indicating the processing mode and the PUCCH format according to the Un UL/DL subframe ratio configuration; the method further includes Determining, by the RN, a processing mode and a PUCCH format for processing the ACK/NACK feedback information according to a configuration indication of the network side;  Or the network side configuration indicating the processing mode includes: the network side indicates the processing mode according to the Un UL/DL subframe ratio configuration; the method further includes: determining, by the RN, according to the network side configuration indication, The processing mode of the ACK/NACK feedback information, and further determining the PUCCH format according to the determined processing mode and the amount of ACK/NACK feedback information. The method according to any one of claims 1, 3, or 4, wherein, for all Un UL/DL Sub-configs, the processing mode of the system pre-defined or network-side configuration indication is a Bundling mode and / or Multiplexing mode, the PUCCH format determined by the RN is the corresponding PUCCH Format la or PUCCH format lb or channel selected PUCCH format lb. The method according to any one of claims 1, 3, or 4, wherein, for all Un UL/DL Sub-configs, the processing mode of the system pre-defined or network-side configuration indication is a cascading mode, determined by the RN The PUCCH format is the corresponding PUCCH format la or PUCCH format lb or channel selected PUCCH format lb or PUCCH format 3. 9. The method according to any one of claims 1, 3, 4, wherein, for Un UL/DL Sub-config #0, #1, #4, #5, #6, #13, #18, The processing mode indicated by the system pre-defined or network-side configuration is Bundling mode and/or Multiplexing mode, and the PUCCH format determined by the RN is the corresponding PUCCH format la or PUCCH format lb. 10. The method according to any one of claims 1, 3, 4, wherein, for Un UL/DL Sub-config #2, #3, #7, #8, #11, #14, #15, The processing mode indicated by the system pre-defined or network-side configuration is Bundling mode and/or Multiplexing mode. The PUCCH format determined by the RN is Corresponding PUCCH format la or PUCCH format lb or channel selected PUCCH format lb. The method according to any one of claims 1, 3, 4, wherein, for Un UL/DL Sub-config #9, #10, #12, #16, #17, system pre-defined or network side The processing mode of the configuration indication is a multiplexing mode and/or a cascading mode, and the PUCCH format determined by the RN is a PUCCH format lb or a PUCCH format 3 of a corresponding channel selection. 12. The method according to any one of claims 1, 3, 4, wherein, for Un UL/DL Sub-config #2, #3, #7, #8, #9, #10, #11, #12, #14, #15, #16, #17, The processing mode indicated by the system pre-defined or network-side configuration is the Multiplexing mode and/or the cascading mode, and the PUCCH format determined by the RN is the PUCCH format of the corresponding channel selection. Or PUCCH format 3. The method of any of claims 1, 5, or 6, wherein the processing mode indicated by the system pre-defined or network-side configuration is Bundling mode and/or Multiplexing mode for any Un UL/DL subframe ratio. The PUCCH format determined by the RN is the corresponding PUCCH format la or PUCCH format lb or the channel selected PUCCH format lb. The method of any of claims 1, 5, or 6, wherein, for any Un UL/DL subframe ratio, the processing mode of the system predefined or network side configuration indication is a cascade mode, determined by the RN The PUCCH format is the corresponding PUCCH format la or PUCCH format lb or channel selected PUCCH format lb or PUCCH format 3. The method according to any one of claims 1, 5, or 6, wherein, when the Un UL/DL subframe ratio is 1:1, the processing mode of the system predefined or network side configuration indication is Bundling mode and / or Multiplexing mode, the PUCCH format determined by the RN is the corresponding PUCCH format la or PUCCH format lb. The method according to any one of claims 1, 5, or 6, wherein, when the Un UL/DL subframe ratio is 1:2, the processing mode of the system predefined or network side configuration indication is Bundling mode and / or Multiplexing mode, the PUCCH format determined by the RN is the corresponding PUCCH format la or PUCCH format lb or the channel selected PUCCH format lb. The method according to any one of claims 1, 5, or 6, wherein, when the Un UL/DL subframe ratio is 1:3 or 1:4, the processing mode of the system predefined or network side configuration indication For the Multiplexing mode and/or the cascading mode, the PUCCH format determined by the RN is the PUCCH format lb or PUCCH format 3 of the corresponding channel selection. The method according to any one of claims 1, 5, or 6, wherein, when the Un UL/DL subframe ratio is 1: 2 or 1: 3 or 1: 4, system pre-defined or network-side configuration The indicated processing mode is a Multiplexing mode and/or a cascading mode, and the PUCCH format determined by the RN is a PUCCH format lb or a PUCCH format 3 of the corresponding channel selection. The method according to any one of claims 1 to 6, wherein the step of the system predefining and/or indicating the processing mode by the network side configuration comprises: for an Un UL/DL Sub-config or Un UL /DL subframe ratio, when the system pre-defines the Un UL/DL Sub-config or Un UL/DL subframe ratio corresponding to two or more processing modes, the network side further configuration indication is used to process the ACK/NACK The processing mode of the feedback information is one of the two or more processing modes. The method according to any one of claims 1 to 6, wherein the Bundling mode The ACK/NACK feedback information corresponding to the downlink transmission of one or more Un DL subframes to be reported in the same Un UL subframe, and the ACK/NACK feedback information is separately performed for each codeword. The "AND" operation forms a lbit or 2 bit feedback information. When the formed feedback information is lbit, the RN uses the PUCCH format la for bearer. When the formed feedback information is 2 bits, the PUCCH format lb is used for carrying in the RN. . The method according to any one of claims 1 to 6, wherein the multiplexing mode refers to an ACK/NACK corresponding to downlink transmission of "Un DL subframes to be reported in the same Un UL subframe" Feedback:  When "=1, the ACK/NACK feedback information is not ANDed, and when the ACK/NACK feedback information is 1 bit, the bearer is used in the RN using the PUCCH format la, when the ACK/NACK When the feedback information is 2 bits, the PUCCH format lb is used for bearing in the RN;  When w = 2 and the downlink transmission of the backhaul link uses the dual-stream mode, the feedback information corresponding to the two codewords of each Un DL subframe in the ACK/NACK feedback information is ANDed, and the AND operation is performed. The obtained information bits are sequentially arranged in the Un DL subframe order, and are carried in the RN using the channel selected PUCCH format lb; when n=2 and the backhaul link downlink transmission uses the single stream mode, the ACK/NACK feedback is performed. The information is sequentially arranged in the order of Un DL subframes, and is carried in the RN using the PUCCH format lb of the channel selection;  ^ n>2 H, performing an AND operation on the feedback information corresponding to different codewords of each Un DL subframe in the ACK/NACK feedback information, and pressing the information bit obtained by the AND operation in the Un DL subframe order Arranged in order, and carried in the RN using the channel selected PUCCH format lb. The method according to any one of claims 1 to 6, wherein the cascading mode refers to: corresponding to downlink transmission of one or more Un DL subframes to be reported in the same Un UL subframe歹|], and carried in the RN using PUCCH format la or PUCCH format lb or channel selected PUCCH format lb or PUCCH format 3. The method according to claim 22, wherein, in the cascading mode, ACK/NACK feedback information corresponding to downlink transmission of an Un DL subframe is to be reported in the same Un UL subframe. Time:  If the backhaul link uses the single stream transmission mode on the one Un DL subframe, the ACK/NACK feedback information to be reported is lbit ACK/NACK information, and is carried in the RN using the PUCCH format la;  If the backhaul link uses the dual stream transmission mode on the one Un DL subframe, the ACK/NACK feedback information to be reported is 2 bit ACK/NACK information, and is carried in the RN using the PUCCH format lb. The method of claim 22, wherein, in the cascading mode, when the ACK/NACK feedback information corresponding to the downlink transmission of an Un DL subframe needs to be reported in the same Un UL subframe: The ACK/NACK feedback information to be reported is the two codewords of the downlink transmission of the Un DL subframe, and the ACK/ corresponding to the downlink transmission of the Un DL subframe. NACK information, ^ , and carried in the RN using the PUCCH format lb;  If the one Un DL subframe does not perform downlink transmission or the back link only uses the single stream transmission mode on the one Un DL subframe, the location of the ACK/NACK feedback information to be reported is NACK. The method according to claim 22, wherein, in the cascading mode, when ACK/NACK feedback information corresponding to downlink transmission of two Un DL subframes needs to be performed on the same Un UL subframe: And the ACK/NACK feedback information to be reported is: the first Un DL subframe in the two Un DL subframes, where the backhaul link is used in the single-stream transmission mode on the two Un DL subframes. One codeword B transmitted downstream. Corresponding ACK/NACK information b ⁰ , and ACK/NACK information corresponding to one ACK/NACK information corresponding to one codeword B ¹ of the downlink transmission of the second Un DL subframe, the ACK/NACK feedback information to be reported is sequentially in the order of Un DL subframes Arranged and carried in the RN using the PUCCH format lb of the channel selection; if the backhaul link in the two Un DL subframes uses the dual stream transmission mode, the report needs to be reported The ACK/NACK feedback information includes two code words 3, 4, 7 of the downlink transmission of the first Un DL subframe of the two Un DL subframes. Corresponding ACK/NACK information b ₀ ⁰ , b? , and two code words of the downlink transmission of the second Un DL subframe, 3/4, 7 corresponding ACK/NACK information, the above-mentioned need, or first The order of the sub-frames after the codeword is sequentially arranged as 4 bits of feedback information. And carrying the bearer in the RN using the PUCCH format lb of the channel selection; and if the two Un DL subframes are not downlinked or only one codeword is transmitted in the two Un DL subframes, it is reported The location of the ACK/NACK feedback information is NACK. The method according to claim 22, wherein, in the cascading mode, when ACK/NACK feedback information corresponding to downlink transmission of n Un DL subframes needs to be reported in the same Un UL subframe, where w >2: If the backhaul link uses a single stream transmission mode of one codeword on the UnDL subframe, the ACK/NACK feedback information to be reported includes the first Un in the n Un DL subframes. ACK/NACK information corresponding to one codeword of the downlink transmission of the DL subframe, ≤ i ≤ n-\, and the ACK/NACK feedback information to be reported is sequentially arranged in the order of Un DL subframes as b°, b .. .b "- ^1, 3 and bearer using PUCCH format in the RN; if the preclude the backhaul link on the Un DL subframe with dual stream transmission, the need to report ACK / NACK feedback information comprising the n The two codewords of the downlink transmission of the first Un DL subframe in the Un DL subframe correspond to the ACK/NACK information corresponding to 7⁄4, 7 ', 0 < i ≤ n-\ , and the ACK/NACK feedback to be reported The information is arranged in the order of the codewords after the first sub-frame.

, or sequentially arranged as b ₀ ⁰ , b, ..m .., b in the order of the first codeword after the subframe, and carried in the RN using PUCCH format 3;  If the n Un DL subframes are not downlinked or only one codeword is transmitted in the n Un DL subframes, the location of the ACK/NACK feedback information to be uplinked is NACK. 27. A relay station, comprising: a system predefined storage module configured to store a processing mode predefined by the system for processing ACK/NACK feedback information to be reported; a feedback information processing reporting module, configured to: process and carry the ACK/NACK feedback information by using a processing mode stored by the system predefined storage module and a physical uplink control channel (PUCCH) format corresponding to the processing mode, And report to the network side;  The processing mode includes one or more of the following: a Bundling mode, a Multiplexing mode, and a cascading mode;  The PUCCH format includes one or more of the following: PUCCH format la, PUCCH format lb, channel selected PUCCH format lb, and PUCCH format 3. The relay station according to claim 27, wherein the processing mode stored by the system predefined storage module is according to a backhaul link uplink/downlink subframe configuration (Un UL/DL Sub-config) or Un UL/DL Sub The back link (Un UL/DL) subframe ratio in the -config is predefined, and the Un UL/DL subframe ratio in the Un UL/DL Sub-config refers to the Un UL/DL Sub- The ratio of the back link uplink (Un UL) subframe configured in the config to the number of backhaul link downlink (Un DL) subframes. 29. The relay station of claim 27, wherein the system predefined storage module is configured to store the processing mode by: storing Un UL/DL Sub-config or Un UL/DL subframe ratio and said Corresponding relationship between processing modes; the feedback information processing reporting module is further configured to: determine, according to the currently used Un UL/DL Sub-config or Un UL/DL subframe ratio and the corresponding relationship, The processing mode of the ACK/NACK feedback information, and determining the PUCCH format according to the determined processing mode and the amount of ACK/NACK feedback information. 30. The relay station of claim 29, further comprising a configuration indication receiving module, the configuration indicating that the receiving module is configured to receive a processing mode and/or a PUCCH format of the network side configuration indication; wherein, for an Un UL/DL Sub- Config or Un UL/DL subframe ratio, if the Un UL/DL Sub-config or Un UL/DL subframe ratio corresponds to two or more processing modes, the processing mode of the network side configuration indication is One of two or more processing modes. A communication system, the communication system comprising a base station and a relay station, wherein the base station is configured to configure a processing mode indicating that the relay station (RN) is configured to process the ACK/NACK feedback information to be reported;  The relay station is configured to: determine a PUCCH format according to a processing mode indicated by the base station configuration and an ACK/NACK feedback information amount, and process and carry the ACK/NACK feedback by using the processing mode and a physical uplink control channel (PUCCH) format. The information is reported to the network side; where the processing mode includes one or more of the following: a Bundling mode, a Multiplexing mode, and a cascading mode;  The PUCCH format includes one or more of the following: PUCCH format la, PUCCH format lb, channel selected PUCCH format lb, and PUCCH format 3.  32. The communication system according to claim 31, wherein the base station is configured to be configured according to a backhaul link uplink/downlink subframe configuration (Un UL/DL Sub-config) or a backhaul in Un UL/DL Sub-config The link uplink and downlink (Un UL/DL) subframe ratio configuration indicates the processing mode, and the Un UL/DL subframe ratio in the Un UL/DL Sub-config refers to the configuration in the Un UL/DL Sub-config The ratio of the backhaul link uplink (Un UL) subframe to the number of backhaul link downlink (Un DL) subframes.