Transmission information feedback method, equipment and system

[0034] The embodiments of the present invention provide a method, equipment and system for transmitting feedback information, which are used to solve the problem of a UE that uses CoMP transmission in uplink. When receiving feedback from multiple base stations participating in cooperation, it is used to indicate whether the same uplink data is received correctly. When the first feedback information and the second feedback information used to indicate to the base station whether the same uplink data needs to be retransmitted are obtained based on the first feedback information, the question of how to feed back the second feedback information to the base station. The embodiment of the present invention includes two cases, one is to transmit the second feedback information separately, and the other is to transmit the second feedback information and the ACK/NACK feedback information of the downlink data simultaneously.

[0035] The embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings of the specification.

[0036] See figure 1 As shown, a method for sending feedback information provided by an embodiment of the present invention includes the following steps:

[0037] Step 11. The UE determines the second feedback information that needs to be fed back in the uplink subframe n according to the feedback timing relationship corresponding to the second feedback information;

[0038] The second feedback information is used to indicate whether the UE will retransmit the same uplink data received by each base station participating in the coordinated transmission of the UE, and the second feedback information includes M 1 The second feedback information corresponding to each downlink subframe in each downlink subframe is based on the second feedback information corresponding to each downlink subframe. 1 The first feedback information received in each of the downlink subframes received from each base station participating in the coordinated transmission of the UE is obtained; the first feedback information is used to indicate whether the base station participating in the coordinated transmission of the UE is The same uplink data sent by the UE is correctly received; M 1 The two downlink subframes are the downlink subframes that are determined according to the feedback timing relationship corresponding to the second feedback information and need to feed back the second feedback information in the uplink subframe n; n is the subframe number, and n is a natural number.

[0039] In the embodiment of the present invention, the base stations participating in the coordinated transmission of the UE include the serving base station of the UE and at least one coordinated base station;

[0040] In this step, according to the feedback timing relationship corresponding to the second feedback information, the UE first determines the downlink subframe that needs to feed back the second feedback information in the uplink subframe n (denoted as M 1 Downlink subframes); then, according to the M 1 The first feedback information fed back by the base stations participating in the coordinated transmission of the UE received in each of the two downlink subframes determines the second feedback information corresponding to each downlink subframe; finally, the M 1 The second feedback information corresponding to each downlink subframe in the downlink subframes is cascaded together to obtain the second feedback information that needs to be fed back in the uplink subframe n.

[0041] Preferably, the second feedback information is ACK/NACK information of uplink data, which is used to indicate to the base station whether the UE needs to retransmit the same uplink data received by the base station participating in the UE’s coordinated transmission, so that the base station can obtain other information. The receiving situation of the same uplink data by the base station participating in the coordinated transmission.

[0042] Step 12. The UE sends the determined second feedback information through PUCCH and/or PUSCH in the uplink subframe n.

[0043] Further, before step 12, the method further includes:

[0044] Step 13. The UE determines the third feedback information that needs to be fed back in the uplink subframe n according to the feedback timing relationship corresponding to the third feedback information;

[0045] Among them, the third feedback information includes M 2 The third feedback information corresponding to each downlink subframe in each downlink subframe is used to indicate whether the downlink data in the downlink subframe is received correctly, M 2 The two downlink subframes are the downlink subframes that are determined according to the feedback timing relationship corresponding to the third feedback information and need to feed back the third feedback information in the uplink subframe n.

[0046] Correspondingly, step 12 further includes:

[0047] Step 12a: The UE simultaneously transmits the second feedback information and the third feedback information through the PUCCH and/or PUSCH in the uplink subframe n.

[0048] It should be noted that in step 13, according to the feedback timing relationship corresponding to the third feedback information, the UE first determines the downlink subframe that needs to feed back the third feedback information in the uplink subframe n (denoted as M 2 Downlink subframes); then, according to oneself in the M 2 If the downlink data sent by the base stations participating in the UE’s coordinated transmission is received in each downlink subframe in each downlink subframe (that is, whether the downlink data can be received correctly), determine the M 2 Third feedback information corresponding to each downlink subframe in the downlink subframes.

[0049] Preferably, the third feedback information is ACK/NACK information of downlink data.

[0050] In the embodiment of the present invention, before step 11, the method further includes:

[0051] The UE performs uplink data transmission according to the scheduling information or period configuration information sent by its serving base station.

[0052] Correspondingly, each base station (including the UE's serving base station and all cooperative base stations) obtains corresponding first feedback information according to whether the same uplink data sent by the UE is correctly transmitted, and feeds it back to the UE; specifically:

[0053] If the base station can correctly receive the same uplink data sent by the UE, the content of the first feedback information obtained by the base station is ACK, and the first feedback information is sent to the UE; and

[0054] If the base station cannot correctly receive the uplink data, the content of the first feedback information obtained by the base station is NACK, and the first feedback information is sent to the UE.

[0055] In the embodiment of the present invention, before step 11, the method further includes:

[0056] The UE receives the downlink data according to the scheduling information or period configuration information sent by the base station.

[0057] Preferably, in step 11, the second feedback information determined by the UE to be sent in the uplink subframe n includes A bit information.

[0058] Preferably, A=1 or A=2.

[0059] It should be noted that if the second feedback information is ACK/NACK information, the second feedback information determined by the UE to be sent in the uplink subframe n is also referred to as the preprocessed uplink data ACK/NACK information. The ACK/NACK information of the processed uplink data is: UE according to each downlink subframe The received ACK/NACK information corresponding to the same uplink data (ie, the first feedback information) fed back by the base stations participating in the UE’s coordinated transmission, where: And Is the index of the downlink subframe set corresponding to the ACK/NACK information of the preprocessed uplink data fed back to the base station in the uplink subframe n, that is, the M mentioned in step 11 1 Downlink subframes. The specific method for the UE to determine the second feedback information according to the received first feedback information may be: if the content of the first feedback information corresponding to the same uplink data returned by at least one base station is ACK, or the UE’s current retransmission The number of times has reached the maximum number of retransmissions, the UE determines that there is no need to retransmit the uplink data, and generates an ACK as the second feedback information to inform the base station that the UE does not need to retransmit the same uplink data; otherwise, that is: each base station The content of the first feedback information returned is all NACK and the current number of retransmissions of the UE is less than the maximum number of retransmissions. The UE determines that it needs to retransmit the uplink data, and generates NACK as the second feedback information to notify the base station that the UE needs to The same uplink data is retransmitted.

[0060] Further, in step 11, the feedback timing relationship corresponding to the second feedback information is configured by the network side to the UE through high-layer signaling; or it is pre-arranged by the UE and each base station; or it is the feedback timing of the third feedback information specified by the 3GPP protocol Relationship (that is, if the downlink subframe nk is the downlink subframe in which the cooperative base station feeds back the ACK/NACK information (ie the first feedback information) of the uplink data for cooperative transmission to the UE, then the UE feeds back the preprocessed uplink data to the base station The ACK/NACK information (that is, the second feedback information) is transmitted in the corresponding uplink subframe determined according to the ACK/NACK feedback timing of the downlink data in the downlink subframe).

[0061] It should be noted that the specific feedback timing relationship used by the UE can be specified in the protocol, or it can be notified to each base station after the UE has determined it, or it can be determined through negotiation between the UE and the base station, but the UE and the base station must have consistent understanding.

[0062] Further, before step 12, the method further includes:

[0063] Step 14. The UE determines whether the third feedback information needs to be fed back in the uplink subframe n;

[0064] If the judgment result is yes (for example, the UE is in the M 2 Downlink data is received in at least one of the downlink subframes), the UE executes step 13 and step 12a;

[0065] If the judgment result is no (for example, the UE is in the M 2 No downlink data is received in any one of the two downlink subframes. This situation further includes the following two possibilities: one is that the base station performs downlink transmission, but the UE has packet loss; the other is that the base station is in M 2 If there is no downlink data that needs to feed back the third feedback information to the UE in two downlink subframes), step 12 further includes:

[0066] Step 12b: In the uplink subframe n, the UE sends only the determined second feedback information through PUCCH or PUSCH.

[0067] Further, step 12b includes:

[0068] In the uplink subframe n, the UE sends the second feedback information on the PUCCH channel resource pre-configured by high-layer signaling or the PUCCH channel resource obtained according to the PDCCH/EPDCCH; or, the second feedback information is sent on the PUSCH by puncturing and mapping. Feedback.

[0069] Preferably, sending the second feedback information on PUCCH channel resources pre-configured by high-layer signaling or PUCCH channel resources obtained according to PDCCH/EPDCCH is applicable to: no PUSCH transmission in uplink subframe n; or PUSCH transmission in uplink subframe n , And supports simultaneous transmission of PUCCH and PUSCH; sending the second feedback information on PUSCH through puncturing mapping is applicable to: PUSCH transmission exists in uplink subframe n, or PUSCH transmission exists in uplink subframe n and does not support PUCCH and When PUSCH is transmitted at the same time.

[0070] Further, in the uplink subframe n, the UE uses one of the following methods to send the second feedback information through the PUCCH channel resource pre-configured by higher layer signaling or the PUCCH channel resource obtained according to the PDCCH/EPDCCH:

[0071] Manner 1. When the number of bits of the second feedback information does not exceed 2 bits, the UE uses the PUCCH format 1a/1b scheme to send the second feedback information on the PUCCH format 1a/1b channel resource; specifically, when the bits of the second feedback information When the number is 1 bit, the PUCCH format1a scheme is adopted, and when the bit number of the second feedback information is 2 bits, the PUCCH format1b scheme is adopted;

[0072] Among them, when the UE obtains PUCCH channel resources according to the PDCCH/EPDCCH, the specific method is as follows:

[0073] When the UE receives a PDSCH with a corresponding PDCCH/EPDCCH on the configured carrier or a PDCCH/EPDCCH indicating downlink semi-persistent scheduling (Semi-Persistent Scheduling, SPS) resource release, the PUCCH format 1a/1b scheme adopts PUCCH format 1a/1b The channel resource can be determined according to the minimum control channel unit CCE/eCCE number of the received PDCCH/EPDCCH (when single-antenna port transmission is used, only one resource is determined. When 2-antenna port transmission is used, the minimum CCE and minimum CCE+ 1 number determines 2 resources, corresponding to each antenna port), when the UE receives an SPSPDSCH without a corresponding PDCCH/EPDCCH on the configured carrier, the PUCCH format 1a/1b channel resource used in the PUCCH format 1a/1b scheme is The channel resource pre-configured by higher layer signaling indicated by the higher-layer signaling indicated by the transmit power control TPC domain in the PDCCH/EPDCCH used to indicate the activation of the SPS PDSCH resource (when a single antenna port is used for transmission, the channel resource indicated by the TPC is 1 resource, When using 2 antenna ports for transmission, the channel resource indicated by the TPC includes 2 resources, corresponding to each antenna port).

[0074] Manner 2: When the number of bits of the second feedback information does not exceed 4 bits, the UE uses the PUCCH format 1b (ie PUCCH format 1b with channel selection) scheme combined with channel selection to send the second feedback information; specifically including:

[0075] The UE determines the channel resource and transmission bit b0b1 corresponding to the second feedback information according to the ACK/NACK mapping table used by the PUCCH format1b with channel selection to transmit the bit length feedback information of the second feedback information, and adopts PUCCH format1b on the determined channel resource Transmit the determined transmission bit b0b1;

[0076] Preferably, the PUCCH format1b channel resources required for PUCCH format1b with channel selection to participate in channel selection are pre-configured by higher layer signaling;

[0077] For example, when the second feedback information is 2 bits, it is assumed to be [ACK, NACK], according to the ACK/NACK mapping table (such as the mapping table shown in Table 2) used to transmit the 2-bit feedback information in PUCCH format 1b with channel selection, determine The channel resource corresponding to the 2-bit second feedback information [ACK, NACK] is numbered Channel resource, the transmission bit b0b1 is "0,1", and the number is The PUCCH format1b scheme is adopted to transmit the 2-bit transmission bit "0,1" on the PUCCH format1b channel resource, which is used to represent the 2-bit second feedback information; among them, Table 2 shows that when PUCCH Format1b with channel selection is used for downlink ACK/NACK information, M 2 =2 ACK/NACK mapping table.

[0078]

[0079] Table 2

[0080] Manner 3: The UE uses the PUCCH format 3 scheme to send the second feedback information;

[0081] Preferably, the PUCCH format 3 channel resources used by the PUCCH format 3 solution are pre-configured by higher layer signaling.

[0082] Further, in step 12a, in the uplink subframe n, the UE simultaneously sends the second feedback information and the third feedback information through PUCCH and/or PUSCH, specifically including one of the following methods:

[0083] Method 1. The UE simultaneously sends the second feedback information and the third feedback information through PUCCH;

[0084] Preferably, Method 1 is applicable to: there is no PUSCH transmission in the uplink subframe n; or there is PUSCH transmission in the uplink subframe n, and the UE supports simultaneous transmission of PUCCH and PUSCH in the same uplink subframe.

[0085] Method 2: If there is PUSCH transmission in the uplink subframe n, the UE simultaneously sends the second feedback information and the third feedback information through the PUSCH;

[0086] Preferably, Method 2 is applicable to: PUSCH transmission exists in uplink subframe n, and the UE does not support PUCCH and PUSCH transmission simultaneously in the same uplink subframe; or there is PUSCH transmission in uplink subframe n and the UE supports PUCCH Simultaneous transmission with PUSCH in the same uplink subframe.

[0087] Method 3: If there is PUSCH transmission in uplink subframe n, and the UE supports simultaneous transmission of PUCCH and PUSCH in the same uplink subframe; the UE sends the second feedback information through PUCCH and the third feedback information through PUSCH; or UE The second feedback information is sent through the PUSCH, and the third feedback information is sent through the PUCCH.

[0088] It should be noted that if there is PUSCH transmission in uplink subframe n, and the UE supports simultaneous transmission of PUCCH and PUSCH in the same uplink subframe, the preferred method 3; if there is PUSCH transmission in uplink subframe n, and the UE does not Supporting simultaneous transmission of PUCCH and PUSCH in the same uplink subframe, method 2 is preferred; if there is no PUSCH transmission in uplink subframe n, only method 1 can be used.

[0089] In the embodiment of the present invention, method 2 specifically includes:

[0090] The UE cascades the second feedback information and the third feedback information, and maps the cascaded information to the corresponding resource of the PUSCH and sends it.

[0091] Further, the UE cascading the second feedback information and the third feedback information further includes:

[0092] The UE cascades the second feedback information after the third feedback information; or

[0093] The UE cascades the third feedback information after the second feedback information.

[0094] It should be noted that the specific cascading processing method to be used can be specified by the agreement, or the UE can notify each base station after it is determined, or it can be negotiated and determined by the base station and the UE, but the understanding of the base station and the UE must be consistent.

[0095] Preferably, the UE maps the concatenated information to the corresponding resources of the PUSCH, which specifically includes:

[0096] The UE maps the concatenated information to the corresponding resources of the PUSCH through puncturing and mapping.

[0097] In the embodiment of the present invention, Method 1 further includes the following three methods:

[0098] Method A, the UE uses the PUCCH format 1b scheme to simultaneously send 2-bit feedback information composed of the cascade of the second feedback information and the third feedback information;

[0099] When a UE receives at least two transport blocks (Transport Block, TB) in a downlink subframe, the UE generates 1-bit ACK/NACK information for each TB in the downlink subframe, and the The ACK/NACK information corresponding to all TBs are combined, and the 1-bit ACK/NACK information obtained after the combined processing is used as the third feedback information corresponding to the downlink subframe;

[0100] Wherein, the second feedback information and the third feedback information both include 1-bit information, and the channel resource used by PUCCH format 1b is the channel resource obtained by the channel resource acquisition method used when the third feedback information is transmitted using the PUCCH format 1b scheme specified in the 3GPP protocol. , Or channel resources pre-configured for higher layer signaling;

[0101] The channel resource acquisition method is specific:

[0102] When the UE receives a corresponding PDCCH/EPDCCH PDSCH or a PDCCH/EPDCCH indicating the release of downlink SPS resources on the configured carrier, the PUCCH format 1b channel resource used in the PUCCH format 1b scheme can be based on the received PDCCH/EPDCCH minimum control channel Unit CCE/eCCE number determination (when single antenna port is used for transmission, only 1 resource is determined, when 2 antenna port is used for transmission, 2 resources are determined according to the minimum CCE and minimum CCE+1 number, corresponding to each antenna port) When the UE receives an SPS PDSCH without a corresponding PDCCH/EPDCCH on the configured carrier, the PUCCH format1b channel resource used in the PUCCH format 1b solution is the transmit power control TPC in the PDCCH/EPDCCH used to indicate the activation of the SPS PDSCH resource The channel resource pre-configured by the higher layer signaling indicated by the domain (when a single antenna port is used for transmission, the channel resource indicated by the TPC is 1 resource, and when 2 antenna ports are used for transmission, the channel resource indicated by the TPC includes 2 resources , Corresponding to each antenna port).

[0103] Preferably, in this manner, when the UE obtains the third feedback information, 2 Combining the ACK/NACK information corresponding to all the downlink data in each downlink subframe obtains the 1-bit third feedback information.

[0104] For example, when there are two TBs of downlink data transmission in a downlink subframe on the carrier, the UE needs to perform spatial bundling of the ACK/NACK information corresponding to the two TBs of downlink data to obtain a 1-bit Information, and use the 1-bit information as the third feedback information corresponding to the downlink subframe.

[0105] Preferably, method A is suitable for the following scenarios: when a frequency division duplex (Frequency Division Duplex, FDD) system with only one carrier is configured, and a Time Division Duplex (TDD) system with only one carrier is configured, when TDD ACK is used /NACK multiplexing transmission mode and M 2 When =1, the TDD system configured with only 1 carrier adopts transmission scenarios such as TDD ACK/NACK bundling transmission mode; in these three transmission scenarios, regardless of the FDD system or the TDD system, one uplink subframe corresponds to only one uplink subframe and requires feedback The downlink subframe of the ACK/NACK information of the downlink data, namely M 2 It is always 1.

[0106] Method B: The UE uses the PUCCH format 1b with channel selection scheme to simultaneously send the second feedback information and the third feedback information;

[0107] Among them, the PUCCH format1b channel resource required for the PUCCH format1b with channel selection scheme to participate in channel selection is the channel resource obtained by the channel resource acquisition method used when the PUCCH format1b with channel selection scheme is used to transmit the third feedback information according to the 3GPP protocol (that is, according to M 2 In all or part of the downlink subframes in two downlink subframes (for example, there are downlink subframes with DAI=1 and 2 and PDCCH/EPDCCH), the PDCCH/EPDCCH that schedules the PDSCH received on the PCC or indicates the release of downlink SPS resources The channel resources obtained by the smallest CCE/eCCE of the PDCCH/EPDCCH, and/or the PDCCH/EPDCCH received on the SCC for scheduling the PDSCH or the ACK/NACK resource indicator field in the PDCCH/EPDCCH indicating the release of the downlink SPS resource. , Usually the ACK/NACK resource indicator field is the reuse of the TPC field), or channel resources pre-configured for higher layer signaling; further, method B includes the following two methods:

[0108] Method B1. The UE cascades the second feedback information and the third feedback information to obtain a feedback information sequence of (A+C) bits; the UE transmits feedback with a bit length of (A+C) according to the PUCCH format1b with channel selection scheme The ACK/NACK mapping table used by the information determines the channel resource and transmission bit b0b1 corresponding to the feedback information sequence; the UE uses PUCCH format1b to send the determined transmission bit b0b1 on the determined channel resource; the specific embodiment is similar to that of the UE in In the uplink subframe n, method 2 is used to send a specific description of the second feedback information through the PUCCH channel resource pre-configured by high-layer signaling or the PUCCH channel resource obtained according to the PDCCH/EPDCCH.

[0109] The second feedback information includes A bit information, and the third feedback information includes C bit information. A and C are positive integers, and (A+C) is not greater than 4.

[0110] Wherein, when the second feedback information and the third feedback information are cascaded, the second feedback information may be cascaded after the third feedback information, or the third feedback information may be cascaded after the second feedback information; specifically The cascading mode may be configured by high-level signaling, or pre-appointed by the UE and the network side, and it is sufficient to maintain the same cascading mode for the UE and the network side.

[0111] Further, in way B1, the UE determines the third feedback information that needs to be fed back in the uplink subframe n according to one of the following ways:

[0112] Way B11, to M 2 Each TB in each downlink subframe in a downlink subframe generates 1-bit ACK/NACK information, and uses the ACK/NACK information corresponding to all TBs in a downlink subframe as the third feedback corresponding to the downlink subframe information;

[0113] Preferably, method B11 is applicable to the following four scenarios:

[0114] First, for FDD systems, TDD ACK/NACK bundling transmission mode, or TDD ACK/NACK multiplexing transmission mode and M 2 =1 transmission scenarios. In these scenarios, when each downlink subframe on the carrier contains only 1 TB (that is, the downlink of the carrier adopts single TB transmission mode), C=1; at this time, further ,

[0115] When A=1, A+C=2, the UE reuses PUCCH format1b with channel selection that transmits 2-bit ACK/NACK information to send the second feedback information and the third feedback information, that is, transmits 2-bit information according to the PUCCH format1b with channel selection scheme The ACK/NACK mapping table used for the feedback information determines the channel resource and transmission bit b0b1 corresponding to the 2-bit feedback information formed by the cascade of the second feedback information and the third feedback information. On the determined channel resource, the PUCCHformat1b scheme is used to send the confirmation The 2-bit transmission bit b0b1;

[0116] When A=2, A+C=3, the UE reuses the PUCCH format1b with channel selection that transmits 3-bit ACK/NACK information to send the second feedback information and the third feedback information, that is, the 3-bit transmission according to the PUCCH format1b with channel selection scheme The ACK/NACK mapping table used for the feedback information determines the channel resource and transmission bit b0b1 corresponding to the 3-bit feedback information formed by the cascade of the second feedback information and the third feedback information. On the determined channel resource, the PUCCHformat1b scheme is used to send the confirmation The 2-bit transmission bit b0b1.

[0117] Second, for FDD systems, TDD ACK/NACK bundling transmission mode, or TDD ACK/NACK multiplexing transmission mode and M 2 =1 transmission scenarios. In these scenarios, when a downlink subframe on the carrier contains 2 TBs (that is, the downlink of the carrier adopts the multi-TB transmission mode), C=2; at this time, further,

[0118] When A=1, A+C=3, and the UE reuses PUCCH format1b with channel selection that transmits 3-bit ACK/NACK information to send the second feedback information and the third feedback information. The specific steps are the same as the above A+C=3 case;

[0119] When A=2, A+C=4, the UE reuses PUCCH format1b with channel selection that transmits 4-bit ACK/NACK information to send the second feedback information and the third feedback information, that is, transmits 4-bit information according to the PUCCH format1b with channel selection scheme The ACK/NACK mapping table used for the feedback information determines the channel resource and transmission bit b0b1 corresponding to the 4-bit feedback information formed by the cascade of the second feedback information and the third feedback information. On the determined channel resource, the PUCCHformat1b scheme is used to send the confirmation The 2-bit transmission bit b0b1.

[0120] Third, for TDD ACK/NACK multiplexing transmission mode and M 2 =2 and each downlink subframe of this carrier contains only 1 TB (that is, the downlink of this carrier adopts single TB transmission mode), C=2; at this time, further,

[0121] When A=1, A+C=3, and the UE reuses PUCCH format1b with channel selection that transmits 3-bit ACK/NACK information to send the second feedback information and the third feedback information. The specific steps are the same as the above A+C=3 case;

[0122] When A=2 and A+C=4, the UE reuses PUCCH format1b with channel selection that transmits 4-bit ACK/NACK information to send the second feedback information and the third feedback information. The specific steps are the same as the above A+C=4 case.

[0123] Fourth, for TDD ACK/NACK multiplexing transmission mode and M 2 =3 and each downlink subframe of the carrier contains only 1 TB in the transmission scenario when A=1, C=3; at this time, further, A+C=4, the UE reuses the transmission of 4-bit ACK/ The PUCCH format 1b withchannel selection of NACK information sends the second feedback information and the third feedback information. The specific steps are the same as above. In the case of A+C=4, this transmission scenario does not support A> 1 situation.

[0124] Way B12, UE to M 2 Each downlink subframe in a downlink subframe generates 1-bit ACK/NACK information. When the UE receives at least two TBs in a downlink subframe, the UE generates a 1-bit ACK for each TB in the downlink subframe /NACK information, the ACK/NACK information corresponding to all TBs in the downlink subframe is combined, and the 1-bit ACK/NACK information obtained after the combined processing is used as the third feedback information corresponding to the downlink subframe;

[0125] Preferably, the merging process adopts a spatial merging method.

[0126] Preferably, method B12 is applicable to the following three scenarios:

[0127] First, for FDD systems, TDD ACK/NACK bundling transmission mode, or TDD ACK/NACK multiplexing transmission mode and M 2 =1 transmission scenario, C is always 1; further,

[0128] When A=1, A+C=2, and the UE reuses PUCCH format1b with channel selection that transmits 2-bit ACK/NACK information to send the second feedback information and the third feedback information. The specific steps are the same as the above A+C=2 case;

[0129] When A=2 and A+C=3, the UE reuses the PUCCH format1b with channel selection that transmits 3-bit ACK/NACK information to send the second feedback information and the third feedback information. The specific steps are the same as the above A+C=3 case.

[0130] Second, for TDD ACK/NACK multiplexing transmission mode and M 2 =2 transmission scenario, at this time C=2; further,

[0131] When A=1, A+C=3, and the UE reuses PUCCH format1b with channel selection that transmits 3-bit ACK/NACK information to send the second feedback information and the third feedback information. The specific steps are the same as the above A+C=3 case;

[0132] When A=2 and A+C=4, the UE reuses PUCCH format1b with channel selection that transmits 4-bit ACK/NACK information to send the second feedback information and the third feedback information. The specific steps are the same as the above A+C=4 case.

[0133] Third, for TDD ACK/NACK multiplexing transmission mode and M 2 =3 transmission scenario, at this time C=3; further,

[0134] When A=1, A+C=4, the UE reuses PUCCH format 1b with channel selection that transmits 4-bit ACK/NACK to send the second feedback information and the third feedback information. The specific steps are the same as the above A+C=4 case; this transmission Not supported in the scene A> 1 situation.

[0135] Method B13, if (2×M 2 +A) value is greater than 4, UE to M 2 Each downlink subframe in a downlink subframe generates 1-bit ACK/NACK information. When the UE receives at least two TBs in a downlink subframe, the UE generates a 1-bit ACK for each TB in the downlink subframe /NACK information, the ACK/NACK information corresponding to all TBs in the downlink subframe is combined, and the 1-bit ACK/NACK information obtained after the combined processing is used as the third feedback information corresponding to the downlink subframe; if ( 2×M 2 +A) the value is not greater than 4, UE to M 2 Each TB in each downlink subframe in a downlink subframe generates 1-bit ACK/NACK information, and uses the ACK/NACK information corresponding to all TBs in a downlink subframe as the third feedback corresponding to the downlink subframe information.

[0136] Preferably, method B13 is applicable to the following two scenarios:

[0137] First, for FDD, TDD ACK/NACK bundling transmission mode, TDD ACK/NACK multipleplexing transmission mode and M 2 =1, TDD ACK/NACK multiplexing transmission mode and M 2 =2 and each downlink subframe of the carrier only contains 1 TB, or TDDACK/NACK multiplexing transmission mode and M 2 =3 and each downlink subframe of the carrier contains only 1 TB and A=1 transmission scenario;

[0138] For each downlink subframe in the carrier, the UE determines the ACK/NACK information corresponding to the downlink data transmitted in each TB in the downlink subframe, and compares the ACK/NACK information corresponding to all TBs in the downlink subframe. Information as the third feedback information corresponding to the downlink subframe;

[0139] Specifically, the UE generates 1-bit ACK/NACK information for each TB in the downlink subframe, and uses 1-bit ACK/NACK information corresponding to all TBs in the downlink subframe as the corresponding downlink subframe Third feedback information;

[0140] In this manner, the specific scheme for the UE to send the second feedback information and the third feedback information can be referred to the description in the manner B11, which will not be repeated here.

[0141] Second, for TDD ACK/NACK multiplexing transmission mode and M 2 =2 and a downlink subframe in the carrier contains 2 TBs, or TDD ACK/NACK multiplexing transmission mode and M 2 =3 and a downlink subframe in the carrier contains 2 TBs and A=1 transmission scenario;

[0142] For each downlink subframe in the carrier, the UE determines the ACK/NACK information corresponding to the downlink data transmitted in each TB in the downlink subframe, and performs ACK/NACK information corresponding to all TBs in the downlink subframe. Combine the processed information, and use the combined information as the third feedback information corresponding to the downlink subframe;

[0143] Specifically, the UE generates 1-bit third feedback information for each downlink subframe, that is, the UE spatially combines the ACK/NACK information corresponding to 2 TBs in the downlink subframe containing 2 TBs, and processes the combination. The information obtained later is used as the third feedback information corresponding to the downlink subframe;

[0144] In this manner, the specific scheme for the UE to send the second feedback information and the third feedback information can be referred to the description in the manner B12, which will not be repeated here.

[0145] It should be noted that the ACK/NACK mapping table in method B1 is the mapping table defined in version Rel-8, or the mapping table defined in Rel-10 that does not use time-domain bundling (where time-domain bundling is used) The combined mapping table refers to a mapping table used for simultaneous transmission of two ACK/NACK feedback sequences, that is, a mapping table that determines the corresponding transmission resource and transmission bit b0b1 according to the combined state of the two ACK/NACK feedback sequences). Which mapping table is used can be configured through high-level signaling, or agreed between the UE and the base station, or specified in the agreement.

[0146] Preferably, the above methods B11, B12, and B13 are more suitable for the case where one carrier is configured.

[0147] Method B2 includes the following steps:

[0148] The UE obtains the first information sequence of Max (A, C) bits according to the second feedback information. When A

[0149] Preferably, the UE may use the determined first information sequence and the second information sequence as the ACK/NACK information sequences corresponding to the primary component carrier (Primary Component Carrier, PCC) and the secondary component carrier (Secondary Component Carrier, SCC) respectively; and according to Max (A, C) Time-domain combined ACK/NACK mapping table corresponding to bits (the time-domain combined mapping table is used to determine the corresponding transmission resource and transmission bit according to the combined state of the ACK/NACK feedback sequence corresponding to PCC and SCC respectively b0b1 mapping table), determine the ACK/NACK information sequence corresponding to the PCC and the channel resource and transmission bit b0b1 corresponding to the ACK/NACK information sequence corresponding to the SCC; and on the determined channel resource, use the PUCCH format1b scheme to send Determined transmission bit b0b1.

[0150] In this method, the UE composes the second feedback information of A bits and the third feedback information of C bits into two independent ACK/NACK information sequences HARQ-ACK. 1 (j) and HARQ-ACK 2 (j), 0≤j≤(M’-1), M’=max(A, C), and HARQ-ACK 1 (j) and HARQ-ACK 2 (j) Respectively regarded as the ACK/NACK information sequence corresponding to the PCC and SCC of the Rel-102CC aggregation UE; when the UE is based on the 2CC aggregation defined in Rel-10, the ACK/NACK mapping table corresponding to M=M' (that is, adopts Time domain combined ACK/NACK mapping table), select the PUCCH format1b channel resource corresponding to the ACK/NACK information sequence HARQ-ACK(j) and the 2-bit transmission bit b0b1 of PUCCH format1b, and follow the selected PUCCH format1b channel resource The PUCCH format1b scheme transmits the determined transmission bit b0b1.

[0151] Preferably, in this manner, the time domain combined ACK/NACK mapping table is the time domain combined mapping table defined in Rel-10.

[0152] Preferably, this way B2 is suitable for M 2 +A is greater than 4, such as TDD ACK/NACK multipleplexing transmission mode and M 2 =3 and A> 1, or TDD ACK/NACK multiplexing transmission mode and M 2 =4 transmission scenarios.

[0153] Preferably, the above-mentioned method B2 is more suitable for the case where one carrier is configured.

[0154] Method C: The UE uses PUCCH format 3 to simultaneously send the second feedback information and the third feedback information.

[0155] Preferably, method C can be applied to FDD systems and TDD systems (that is, TDD uses any ACK/NACK transmission mode, specifically including TDD ACK/NACK bundling transmission mode, TDD ACK/NACK multiplexing transmission mode and M 2 =1, and TDD ACK/NACK multiplexing transmission mode and M 2 1).

[0156] It should be noted that no matter how many carriers are configured for the UE, the UE preferably uses CPUCCH format 3 to send the second feedback information and the third feedback information at the same time; or, when the system configures more than one carrier for the UE, the UE The second feedback information and the third feedback information are sent simultaneously using PUCCH format 3.

[0157] Further, method C specifically includes the following two methods:

[0158] Mode C1, the UE cascades the second feedback information and the third feedback information, and performs joint coding on the information sequence after the cascade processing; the UE determines the channel resource used to transmit the second feedback information and the third feedback information; The UE sends the coded information after joint coding through the determined channel resource;

[0159] The cascading process includes the following two methods: the UE cascades the second feedback information after the third feedback information; or the UE cascades the third feedback information after the second feedback information.

[0160] It should be noted that the specific cascading processing method to be used can be specified by the agreement, or the UE can notify each base station after it is determined, or it can be negotiated and determined by the base station and the UE, but the understanding of the base station and the UE must be consistent.

[0161] Method C2, UE separately encodes the second feedback information and the third feedback information (preferably, the independently encoded second feedback information and the encoding information corresponding to the third feedback information should be interleaved and mapped into one uplink subframe Transmit in different time slots of, to obtain diversity gain, of course, the interleaving mapping may not be performed); the UE determines the channel resources used to transmit the second feedback information and the third feedback information; the UE sends the independently coded information through the determined channel resources Encoding information.

[0162] Further, in the method C1 and the method C2, the UE determines the channel resources used to transmit the second feedback information and the third feedback information, specifically including the following two methods:

[0163] 1. The UE determines that the channel resource used to transmit the second feedback information and the third feedback information is at least one PUCCH format 3 channel resource pre-configured to the UE by higher layer signaling;

[0164] Among them, when PUCCH format3 adopts single-antenna port transmission, the number of PUCCH format3 channel resources pre-configured to UE by high-level signaling is one; when PUCCH format3 adopts 2-antenna port transmit diversity transmission scheme, high-level signaling is pre-configured to The number of PUCCH format3 channel resources of the UE is two, corresponding to each antenna port;

[0165] 2. UE based on M 2 The indication information used to indicate the bit field of the ACK/NACK resource in the PDCCH/EPDCCH received in two downlink subframes is used to determine the channel resource used to transmit the second feedback information and the third feedback information, where the channel resource is the upper layer At least one PUCCH format 3 channel resource among multiple PUCCH format 3 channel resources pre-configured for the UE by signaling;

[0166] Among them, when PUCCH format3 adopts single-antenna port transmission, the number of channel resources used to transmit the second feedback information and the third feedback information is determined to be one; when PUCCH format3 adopts a 2-antenna port transmit diversity transmission scheme, it is determined to use The number of channel resources for transmitting the second feedback information and the third feedback information is two, corresponding to each antenna port.

[0167] Preferably, the bit field used to indicate the ACK/NACK resource is the reuse of the TPC field, which specifically includes: the TPC field in the PDCCH/EPDCCH with a DAI value greater than 1 transmitted on the PCC, and the transmission on the PCC used to schedule the SCC The TPC domain in the PDCCH/EPDCCH, and the TPC domain in the PDCCH/EPDCCH transmitted on the SCC.

[0168] In the embodiment of the present invention, if the UE is in the determined M 2 If the PDCCH/EPDCCH is not received in each downlink subframe, the UE sends the second feedback information and the third feedback information simultaneously through the PUCCH in one of the following ways:

[0169] Method 1: For the FDD system or TDD system, if the UE only has a physical downlink shared channel PDSCH or a PDCCH/EPDCCH indicating the release of downlink SPS resources on the PCC, the UE will release the PDSCH or the PDCCH/EPDCCH indicating the release of downlink SPS resources. The ACK/NACK feedback information (1 bit) corresponding to the EPDCCH is used as the third feedback information, and the second feedback information and the third feedback information are sent simultaneously using method C3 or method C4;

[0170] The PDSCH may be a PDSCH with a corresponding PDCCH/EPDCCH, or a PDSCH without a corresponding PDCCH/EPDCCH.

[0171] Method 2: For the TDD system, if the UE receives a PDCCH/EPDCCH for indicating the release of downlink SPS resources and a PDSCH without corresponding PDCCH/EPDCCH on the PCC, the UE will indicate the PDCCH/EPDCCH for the release of downlink SPS resources And the ACK/NACK feedback information corresponding to the PDSCH without the corresponding PDCCH/EPDCCH (corresponding to 1 bit ACK/NACK, 2 bits in total) is used as the third feedback information, and the second feedback information and the third feedback information are sent simultaneously using method C4. Feedback.

[0172] Method 3: For the TDD system, if the UE receives a PDSCH without a corresponding PDCCH/EPDCCH and a PDSCH with a corresponding PDCCH/EPDCCH on the PCC, the UE will treat the PDSCH without a corresponding PDCCH/EPDCCH and the PDSCH with the corresponding PDCCH/EPDCCH. The ACK/NACK feedback information corresponding to the PDSCH of the corresponding PDCCH/EPDCCH is used as the third feedback information (2 or 3 bits in total, depending on whether the PDSCH contains two TBs and whether the ACK/NACK of the two TBs are combined), and Use method C4 to send the second feedback information and the third feedback information at the same time.

[0173] The method C3 is specifically: the UE uses PUCCH format 1b to simultaneously send 2-bit feedback information composed of the second feedback information and the third feedback information cascade, and when at least two TBs are received in one downlink subframe, the UE will Each TB in the downlink subframe generates 1-bit ACK/NACK information, the ACK/NACK information corresponding to all TBs in the downlink subframe is combined, and the 1-bit ACK/NACK information obtained after the combined processing is used as the The third feedback information corresponding to the downlink subframe, where the channel resource used by PUCCH format 1b is the channel resource obtained by the channel resource acquisition method used when PUCCH format 1b is used to transmit the third feedback information according to the 3GPP protocol (the specific acquisition method is the same as above The description in A), or channel resources pre-configured for high-layer signaling, the second feedback information and the third feedback information are both 1 bit;

[0174] Method C4 is specifically: UE adopts PUCCH format 1b with channel selection, and sends second feedback information and third feedback information at the same time according to the following steps: UE cascades the second feedback information and third feedback information to obtain (A+C ) Bit feedback information sequence; the UE determines the channel resource corresponding to the feedback information sequence and the transmission bit b0b1 according to the ACK/NACK mapping table used by the PUCCHformat1b with channel selection scheme to transmit feedback information with a bit length of (A+C); The UE uses the PUCCH format1b scheme to send the determined transmission bit b0b1 on the determined channel resource; the second feedback information includes A bit information, the third feedback information includes C bit information, A and C are positive integers, and (A+ C) Not greater than 4 (the method for acquiring channel resources specifically used for channel selection is the same as the description in Method B above).

[0175] When the method C3 is adopted, the UE determines each third feedback information that needs to be fed back in the uplink subframe n according to the following steps:

[0176] The UE generates 1-bit ACK/NACK information for a PDSCH received on the PCC or a PDCCH/EPDCCH indicating the release of downlink SPS resources. If the PDSCH contains at least two TBs, the UE generates a message for each TB in the PDSCH 1-bit ACK/NACK information, merging the ACK/NACK information corresponding to all TBs in the PDSCH, and using the 1-bit ACK/NACK information obtained after the merging process as the third feedback information corresponding to the PDSCH;

[0177] When using method C4, the UE determines each third feedback information that needs to be fed back in the uplink subframe n according to the following steps:

[0178] The UE generates 1-bit ACK/NACK information for a PDSCH received on the PCC that does not have a corresponding PDCCH/EPDCCH;

[0179] The UE generates 1-bit ACK/NACK information for a PDCCH/EPDCCH that indicates the release of downlink SPS resources received on the PCC;

[0180] The UE generates 1-bit ACK/NACK information for each TB in a PDSCH with a corresponding PDCCH/EPDCCH received on the PCC, and uses the ACK/NACK information corresponding to all TBs in the PDSCH as the first corresponding PDSCH. Three feedback information; or, the UE generates 1-bit ACK/NACK information for a PDSCH with a corresponding PDCCH/EPDCCH received on the PCC, and when the PDSCH contains at least two TBs, the UE generates each TB in the PDSCH Generate 1-bit ACK/NACK information, merge the ACK/NACK information corresponding to all TBs in the PDSCH, and use the 1-bit ACK/NACK information obtained after the merging process as the third feedback information corresponding to the PDSCH; or, If the number of bits of the second feedback information is greater than 3, the UE generates 1-bit ACK/NACK information for each TB in a PDSCH with a corresponding PDCCH/EPDCCH received on the PCC, and corresponds to all TBs in the PDSCH. The ACK/NACK information is combined, and the 1-bit ACK/NACK information obtained after the combined processing is used as the third feedback information corresponding to the PDSCH. If the number of bits of the second feedback information is not greater than 3, the UE will receive the information on the PCC. Each TB in the PDSCH with a corresponding PDCCH/EPDCCH generates 1-bit ACK/NACK information, and uses the ACK/NACK information corresponding to all TBs in the PDSCH as the third feedback information corresponding to the PDSCH.

[0181] Specifically, in the second manner, the UE determines the third feedback information in the following manner:

[0182] The UE respectively determines the received 1-bit ACK/NACK information corresponding to the PDCCH/EPDCCH used to indicate the release of downlink SPS resources and the 1-bit ACK/NACK information corresponding to the PDSCH without the corresponding PDCCH/EPDCCH. The ACK/NACK information serves as the third feedback information.

[0183] For example, in this manner, the UE generates 1-bit ACK/NACK information for the received PDCCH/EPDCCH indicating the release of downlink SPS resources and the PDSCH that does not have the corresponding PDCCH/EPDCCH respectively, that is, the 2-bit first Three feedback information (at this time C=2); then:

[0184] When A=1, A+C=3, the UE reuses PUCCH format1b with channel selection that transmits 3-bit ACK/NACK information to send the second feedback information and the third feedback information at the same time, the specific steps are the same as the above A+C=3 case; and

[0185] When A=2 and A+C=4, the UE reuses PUCCH format1b with channel selection that transmits 4-bit ACK/NACK information to send the second feedback information and the third feedback information at the same time. The specific steps are the same as the above A+C=4 case.

[0186] Specifically, in the third manner, the UE determines the third feedback information in the following manner:

[0187] As an implementation manner, if the PDSCH with the corresponding PDCCH/EPDCCH only contains 1 TB (that is, the PDSCH adopts the single TB transmission mode), the UE separately determines the 1 TB in the PDSCH with the corresponding PDCCH/EPDCCH The corresponding 1-bit ACK/NACK information and the 1-bit ACK/NACK information corresponding to the PDSCH without the corresponding PDCCH/EPDCCH; the UE uses all the obtained ACK/NACK information as the third feedback information.

[0188] For example, in this implementation, the UE generates 1-bit ACK/NACK information for the received PDSCH with corresponding PDCCH/EPDCCH and the PDSCH without corresponding PDCCH/EPDCCH, and obtains 2-bit third feedback information. (C=2 at this time), then:

[0189] When A=1, A+C=3, the UE reuses PUCCH format1b with channel selection that transmits 3-bit ACK/NACK information to send the second feedback information and the third feedback information at the same time, the specific steps are the same as the above A+C=3 case; and

[0190] When A=2 and A+C=4, the UE reuses PUCCH format1b with channel selection that transmits 4-bit ACK/NACK information to send the second feedback information and the third feedback information at the same time. The specific steps are the same as the above A+C=4 case.

[0191] As another implementation manner, if the PDSCH with the corresponding PDCCH/EPDCCH contains at least two TBs (that is, the PDSCH adopts the multi-TB transmission mode), the UE separately determines each TB in the PDSCH with the corresponding PDCCH/EPDCCH The corresponding 1-bit ACK/NACK information and the 1-bit ACK/NACK information corresponding to the PDSCH without the corresponding PDCCH/EPDCCH; the UE uses all the obtained ACK/NACK information as the third feedback information.

[0192] For example, in this implementation, when A=1, the UE generates 1-bit ACK/NACK information for each TB in the received PDSCH with the corresponding PDCCH/EPDCCH, and the received information The PDSCH with the corresponding PDCCH/EPDCCH generates 1-bit ACK/NACK information, and uses the 3-bit ACK/NACK information as the third feedback information (in this case, C=3), then: A+C=4, this The UE reuses the PUCCH format 1b with channel selection that transmits 4-bit ACK/NACK information to send the second feedback information and the third feedback information at the same time, and the specific steps are the same as in the case of A+C=4;

[0193] When A=2, the UE generates 1-bit ACK/NACK information for the received PDSCH with the corresponding PDCCH/EPDCCH and the PDSCH without the corresponding PDCCH/EPDCCH, and has a corresponding PDCCH/EPDCCH. The ACK/NACK information of the 2 TBs in the PDSCH is spatially combined to obtain 2-bit ACK/NACK information (in this case, C=2), then: A+C=4, the UE reuses to transmit 4-bit ACK/NACK information The PUCCH format 1b with channel selection sends the second feedback information and the third feedback information at the same time, and the specific steps are the same as in the case of A+C=4.

[0194] As yet another implementation manner, if the PDSCH with the corresponding PDCCH/EPDCCH contains at least two TBs, the UE separately determines the 1-bit ACK/NACK information corresponding to each TB in the PDSCH with the corresponding PDCCH/EPDCCH and no The 1-bit ACK/NACK information corresponding to the PDSCH with the corresponding PDCCH/EPDCCH; the UE combines the ACK/NACK information corresponding to all TBs with the corresponding PDCCH/EPDCCH PDSCH, and combines the 1-bit ACK obtained after the combined processing /NACK information is used as the 1-bit ACK/NACK information corresponding to the PDSCH with the corresponding PDCCH/EPDCCH; the UE combines the 1-bit ACK/NACK information obtained after the processing and the 1-bit ACK/NACK information corresponding to the PDSCH without the corresponding PDCCH/EPDCCH NACK information is used as the third feedback information.

[0195] For example, in this implementation, regardless of A=1 or 2, the UE always generates 1-bit ACK/NACK information for the received PDSCH with the corresponding PDCCH and the PDSCH without the corresponding PDCCH/EPDCCH (ie The UE spatially combines the ACK/NACK information corresponding to the 2 TBs in the PDSCH with the corresponding PDCCH/EPDCCH to obtain 1-bit ACK/NACK information), and uses the 2-bit ACK/NACK information as the third Feedback information (C=2 at this time), then:

[0196] When A=1, A+C=3, the UE reuses PUCCH format1b with channel selection that transmits 3-bit ACK/NACK information and sends the second feedback information and the third feedback information at the same time; and

[0197] When A=2 and A+C=4, the UE reuses PUCCH format1b with channel selection that transmits 4-bit ACK/NACK information and sends the second feedback information and the third feedback information at the same time.

[0198] Based on the foregoing embodiment, the embodiment of the present invention also provides a method for receiving feedback information, see figure 2 As shown, the method includes the following steps:

[0199] Step 21: Determine the number of bits of the second feedback information fed back by the UE in the uplink subframe n according to the feedback timing relationship corresponding to the second feedback information;

[0200] Among them, the number of bits of the second feedback information is M 1 The sum of the number of bits of the second feedback information corresponding to each downlink subframe in each downlink subframe, M 1 The second feedback information corresponding to each downlink subframe in the two downlink subframes is that the UE 1 The first feedback information received in each of the downlink subframes received from each base station participating in the coordinated transmission of the UE is obtained, and the first feedback information is used to indicate whether the base station participating in the coordinated transmission of the UE is The same uplink data sent by the UE correctly received, M 1 The two downlink subframes are the downlink subframes that are determined according to the feedback timing relationship corresponding to the second feedback information and need to feed back the second feedback information in the uplink subframe n;

[0201] Step 22: In the uplink subframe n, the base station receives the second feedback information through PUCCH and/or PUSCH, and determines whether the UE performs uplink data retransmission according to the second feedback information.

[0202] Further, the method also includes:

[0203] Step 23: The base station determines the number of bits of the third feedback information fed back by the UE in the uplink subframe n according to the feedback timing relationship corresponding to the third feedback information;

[0204] Among them, the number of bits of the third feedback information is M 2 The sum of the number of bits of the third feedback information corresponding to each downlink subframe in each downlink subframe, M 2 The third feedback information corresponding to each downlink subframe in each downlink subframe is used to indicate whether the downlink data in the downlink subframe is received correctly, M 2 The two downlink subframes are the downlink subframes that are determined according to the feedback timing relationship corresponding to the third feedback information and need to feed back the third feedback information in the uplink subframe n;

[0205] Correspondingly, step 22 further includes:

[0206] Step 22a: In the uplink subframe n, the base station simultaneously receives the second feedback information and the third feedback information through PUCCH and/or PUSCH, and determines whether the UE performs uplink data retransmission according to the second feedback information, and according to the third feedback The information determines whether to retransmit the downlink data.

[0207] Further, before step 21, the method further includes:

[0208] The base station sends downlink data to the UE; and

[0209] Base station in each downlink subframe The first feedback information used to indicate whether the same uplink data is correctly transmitted is fed back to the UE, where: Subframe set Element in, M (u) (Ie M 2 ) Is the number of downlink subframes fed back through the same uplink subframe, and M (u) Is a positive integer.

[0210] Further, before step 22, the method further includes:

[0211] Step 24: The base station determines whether the third feedback information needs to be received in the uplink subframe n;

[0212] If the judgment result is yes (for example, the base station is in M 2 If at least one of the downlink subframes transmits downlink data that needs to feed back the third feedback information to the UE), the base station performs step 23 and step 22a;

[0213] If the judgment result is no, step 22 further includes:

[0214] Step 22b: The base station sends only the second feedback information through PUCCH/or PUSCH in the uplink subframe n:

[0215] Further, step 22b specifically includes:

[0216] In the uplink subframe n, the base station receives the second feedback information on the PUCCH channel resource pre-configured through high-layer signaling or obtained according to the PDCCH/EPDCCH, and determines whether the UE performs uplink data retransmission according to the second feedback information; or, The second feedback information is received on the PUSCH in a punctured mapping manner; and according to the second feedback information, it is determined whether the UE performs uplink data retransmission.

[0217] Further, in step 22b, in the uplink subframe n, the base station uses one of the following methods to receive the second feedback information on the PUCCH channel resource pre-configured by high-layer signaling or the PUCCH channel resource obtained according to the PDCCH/EPDCCH, specifically include:

[0218] Manner 1', when the number of bits of the second feedback information does not exceed 2 bits, the base station uses the PUCCH format 1a/1b scheme to receive the second feedback information on the PUCCH format 1a/1b channel resource;

[0219] Since this method 1'corresponds to the above method 1, please refer to the description of the above method 1 for details, which will not be repeated here.

[0220] Manner 2', when the number of bits of the second feedback information does not exceed 4 bits, the base station adopts the PUCCH format1b with channel selection scheme to receive the second feedback information, which specifically includes: the base station adopts the PUCCH format 1b scheme on all channel resources participating in channel selection to receive the UE The transmitted transmission bit b0b1 determines the channel resource where the received transmission bit b0b1 is located, and determines the received transmission bit according to the ACK/NACK mapping table used by the PUCCH format1b with channel selection to transmit the bit length feedback information of the second feedback information b0b1 and second feedback information corresponding to the channel resource where the transmission bit b0b1 is located;

[0221] Since this method 2'corresponds to the above method 2, please refer to the description of the above method 1 for details, which will not be repeated here.

[0222] Manner 3', the base station uses PUCCH format 3 to receive the second feedback information;

[0223] Since this mode 3'corresponds to the above mode 3, please refer to the description of the above mode 1 for details, and will not be repeated here.

[0224] Preferably, the feedback timing relationship corresponding to the second feedback information in the embodiment of the present invention is determined by the network side and configured to the UE through high-level signaling; or pre-arranged by the UE and each base station; or the third feedback specified in the 3GPP protocol Information feedback timing relationship.

[0225] The case where the above judgment result is no includes: the base station is in the M 2 There is no downlink data that needs to feed back the third feedback information to the UE in any one of the downlink subframes; or, the base station is in the M 2 At least one of the two downlink subframes transmits downlink data that needs to feed back the third feedback information to the UE, and the base station determines that the UE has packet loss (that is, the UE does not receive any downlink data that needs to feed back the third feedback information ).

[0226] Further, in step 22a, the base station simultaneously receives the second feedback information and the third feedback information through the PUCCH and/or PUSCH in the uplink subframe n, specifically including one of the following methods:

[0227] Method 1', the base station simultaneously receives the second feedback information and the third feedback information through the PUCCH;

[0228] Since method 1'corresponds to the above method 1, please refer to the description of the above method 1 for details, which will not be repeated here.

[0229] Method 2', if there is PUSCH transmission in the uplink subframe n, the base station simultaneously receives the second feedback information and the third feedback information through the PUSCH;

[0230] Since method 2'corresponds to the foregoing method 2, please refer to the description of the foregoing method 2 for details, which will not be repeated here.

[0231] Method 3', if there is PUSCH transmission in uplink subframe n and the UE supports simultaneous transmission of PUCCH and PUSCH in the same uplink subframe, the base station receives the second feedback information through PUCCH and the third feedback information through PUSCH, or the base station Receiving the second feedback information through PUSCH, and receiving the third feedback information through PUCCH;

[0232] Since method 3'corresponds to the above method 3, please refer to the description of the above method 3 for details, which will not be repeated here.

[0233] In the embodiment of the present invention, method 1'further includes the following three methods:

[0234] Manner A', the base station adopts the PUCCH format 1b scheme to simultaneously receive 2-bit feedback information formed by cascading the second feedback information and the third feedback information;

[0235] When the base station sends at least two TBs to the UE in a downlink subframe, the base station determines that the UE has combined the ACK/NACK information corresponding to each TB in the downlink subframe, and combined the combined processing to obtain 1 Bit ACK/NACK information is used as the third feedback information corresponding to the downlink subframe, where the second feedback information and the third feedback information are both 1 bit, and the channel resource used by PUCCH format 1b is transmitted in PUCCH format 1b according to the 3GPP protocol The channel resource obtained by the channel resource acquisition method used in the third feedback information, or the channel resource pre-configured for high-layer signaling.

[0236] For example, in this manner, the base station may determine that the first bit of information is the second feedback information, and the second bit of information is the third feedback information, or vice versa.

[0237] Since the method A'corresponds to the above method A, please refer to the description of the above method A for details, which will not be repeated here.

[0238] Method B’, the base station adopts the PUCCH format 1b with channel selection scheme, and receives the second feedback information and the third feedback information at the same time according to any of the following methods:

[0239] Method B1', the base station uses the PUCCH format1b scheme on all channel resources participating in channel selection to receive the transmission bit b0b1 sent by the UE, and determines the channel resource where the received transmission bit b0b1 is located. According to PUCCH format1b with channel selection, the transmission bit length is ( A+C) the ACK/NACK mapping table used for the feedback information, determine the received transmission bit b0b1 and the channel resource corresponding to the transmission bit b0b1, which is obtained by cascading the second feedback information and the third feedback information (A +C) bit feedback information sequence; where the second feedback information includes A bit information, and the third feedback information includes C bit information, A and C are positive integers, and (A+C) is not greater than 4;

[0240] Method B2', the base station uses the PUCCH format1b scheme to receive transmission bits on all channel resources participating in channel selection, determines the channel resource where the received transmission bits are located, and transmits 2 bits according to the PUCCHformat1b with channel selection scheme. The length is Max(A, C The ACK/NACK mapping table used for the feedback information of) determines the received transmission bit and the two feedback information sequences corresponding to the channel resource where the transmission bit is located; wherein, one of the two feedback information sequences is The first information sequence of Max(A,C) bits obtained by the UE according to the second feedback information, when A

[0241] Since the method B2' corresponds to the above method B2, please refer to the description of the above method B2 for details, which will not be repeated here.

[0242] Further, for mode B1', the base station determines the third feedback information fed back by the UE in the uplink subframe n according to the following steps:

[0243] Method B11’, the base station determines that the UE is 2 Each TB in each downlink subframe in each downlink subframe generates 1-bit ACK/NACK information, and the UE uses the ACK/NACK information corresponding to all TBs in one downlink subframe as the third corresponding to the downlink subframe. Feedback;

[0244] Since the method B11' corresponds to the above method B11, please refer to the description of the above method B11 for details, which will not be repeated here.

[0245] Method B12’, the base station determines that the UE is 2 Each downlink subframe in the two downlink subframes generates 1-bit ACK/NACK information. When the base station sends at least two TBs to the UE in one downlink subframe, the base station determines that the UE for at least two of the downlink subframes ACK/NACK information corresponding to the TB is combined, and the UE uses the combined information as the third feedback information corresponding to the downlink subframe;

[0246] Since the method B12' corresponds to the above method B12, please refer to the description of the above method B12 for details, which will not be repeated here.

[0247] Method B13’, if (2×M 2 +A) is greater than 4, the base station determines that the UE is 2 Each downlink subframe in the two downlink subframes generates 1-bit ACK/NACK information. When the base station sends at least two TBs to the UE in one downlink subframe, the base station determines that the UE for at least two of the downlink subframes The ACK/NACK information corresponding to the TB is combined and the UE uses the combined information as the third feedback information corresponding to the downlink subframe; if (2×M 2 +A) is not greater than 4, the base station determines that the UE is 2 Each TB in each downlink subframe in a downlink subframe generates 1-bit ACK/NACK information and the UE uses the ACK/NACK information corresponding to all TBs in a downlink subframe as the third feedback corresponding to the downlink subframe information.

[0248] Since the method B13' corresponds to the above method B13, please refer to the description of the above method B13 for details, which will not be repeated here.

[0249] Method C', the base station adopts PUCCH format3, and receives the second feedback information and the third feedback information at the same time according to any of the following methods:

[0250] Mode C1', the base station determines the channel resource used to transmit the second feedback information and the third feedback information; on the determined channel resource, the base station uses a joint decoding method to receive the information obtained by cascading the second feedback information and the third feedback information;

[0251] Since the method C1' corresponds to the above method C1, please refer to the description of the above method C1 for details, which will not be repeated here.

[0252] Mode C2', the base station determines the channel resources used to transmit the second feedback information and the third feedback information; the base station uses independent decoding on the determined channel resources to receive the second feedback information and the third feedback information independently encoded encoded information .

[0253] Since the method C2' corresponds to the above method C2, please refer to the description of the above method C2 for details, which will not be repeated here.

[0254] Further, in the method C1' and the method C2', the UE determines the channel resources used to transmit the second feedback information and the third feedback information, specifically including the following two methods: the base station determines to transmit the second feedback information and the third feedback Information channel resources include:

[0255] 1. The base station determines that the channel resource used to transmit the second feedback information and the third feedback information is at least one PUCCH format 3 channel resource pre-configured to the UE by higher layer signaling;

[0256] 2. The base station determines the channel resource for transmitting the second feedback information and the third feedback information according to the indication information of the bit field used to indicate the ACK/NACK resource in the PDCCH/EPDCCH sent to the UE, where the channel resource is high-level signaling At least one PUCCH format 3 channel resource among the multiple PUCCH format 3 channel resources pre-configured for the UE.

[0257] Specifically, when PUCCH format3 uses a single antenna port for transmission, the number of PUCCH format3 channel resources pre-configured for UE by high-level signaling is one; when PUCCH format3 uses a 2-antenna port transmit diversity transmission scheme, high-level signaling is preconfigured The number of PUCCH format 3 channel resources for the UE is two.

[0258] Preferably, the bit field used to indicate the ACK/NACK resource is the reuse of the TPC field, which specifically includes: the TPC field in the PDCCH/EPDCCH with a DAI value greater than 1 transmitted on the PCC, and the transmission on the PCC used to schedule the SCC The TPC domain in the PDCCH/EPDCCH, and the TPC domain in the PDCCH/EPDCCH transmitted on the SCC.

[0259] In the embodiment of the present invention, if the base station is in M 2 No PDCCH/EPDCCH is sent to the UE in two downlink subframes or the base station determines that the UE is in M 2 If the PDCCH/EPDCCH is not received in each downlink subframe, the base station receives the second feedback information and the third feedback information simultaneously through the PUCCH in one of the following ways:

[0260] Method one', for frequency division duplex FDD system or time division duplex TDD system, if the base station only sends a PDSCH or a PDCCH/EPDCCH to indicate the release of downlink SPS resources to the UE on the primary component carrier PCC of the UE, the base station Determine that the third feedback information only includes the ACK/NACK feedback information (1 bit in total) corresponding to the PDSCH or the PDCCH/EPDCCH indicating the release of the downlink SPS resources, and use method C3' or method C4' to simultaneously receive the second feedback information and the second feedback information Three feedback information;

[0261] The PDSCH may be a PDSCH with a corresponding PDCCH/EPDCCH, or a PDSCH without a corresponding PDCCH/EPDCCH.

[0262] Method 2'. For the TDD system, if the base station sends a PDCCH/EPDCCH indicating the release of downlink SPS resources and a PDSCH without corresponding PDCCH/EPDCCH on the PCC of the UE, the base station determines that the third feedback information only includes The PDCCH/EPDCCH indicating the release of downlink SPS resources and the ACK/NACK feedback information corresponding to the PDSCH without the corresponding PDCCH/EPDCCH (corresponding to 1 bit of ACK/NACK information, 2 bits in total), and simultaneously received in method C4' The second feedback information and the third feedback information;

[0263] Manner 3'. For the TDD system, if the base station sends a PDSCH without a corresponding PDCCH/EPDCCH and a PDSCH with a corresponding PDCCH/EPDCCH on the PCC of the UE, the base station determines that the third feedback information only includes the The PDSCH of the corresponding PDCCH/EPDCCH and the ACK/NACK feedback information corresponding to the PDSCH with the corresponding PDCCH/EPDCCH (2 or 3 bits in total, depending on whether the PDSCH contains two TBs and whether the ACK/NACK for these two TBs NACK is combined), and the second feedback information and the third feedback information are received at the same time using method C4'.

[0264] Among them, the way C3' specifically is: the base station adopts PUCCH format 1b to simultaneously receive 2-bit feedback information formed by the cascade of the second feedback information and the third feedback information, where the second feedback information and the third feedback information are both 1 bit, when When the base station sends at least two TBs to the UE in a downlink subframe, the base station determines that the UE performs the combined processing of the ACK/NACK information corresponding to each TB in the downlink subframe, and uses the combined information as the The third feedback information corresponding to the downlink subframe, where the channel resource used by PUCCH format 1b is the channel resource obtained by the channel resource acquisition method used when PUCCH format 1b is used to transmit the third feedback information according to the 3GPP protocol, or it is high-level signaling Pre-configured channel resources;

[0265] Method C4' is specifically: the base station adopts the PUCCH format1b with channel selection scheme, and receives the second feedback information and the third feedback information at the same time according to the following steps: the base station uses the PUCCH format1b scheme to receive data on all channel resources participating in channel selection, and confirms the reception The received transmission bit b0b1 and the channel resource where the transmission bit b0b1 is located are determined according to the ACK/NACK mapping table used in the PUCCH format1b withchannel selection transmission (A+C) bit feedback information to determine the received transmission bit b0b1 and the transmission bit b0b1 (A+C) bit feedback information sequence obtained by concatenating the second feedback information corresponding to the channel resource and the third feedback information; wherein the second feedback information includes A bit information, and the third feedback information includes C bit information , A and C are positive integers, and (A+C) is not greater than 4.

[0266] For mode C3', the base station determines that the UE determines the third feedback information that needs to be fed back in the uplink subframe n in the following manner:

[0267] The base station determines that the UE generates 1-bit ACK/NACK information for the PDSCH received on the PCC or the PDCCH/EPDCCH indicating the release of downlink SPS resources. When the base station sends at least two TBs to the UE in the PDSCH, the base station determines that the UE Combine the ACK/NACK information corresponding to each TB in the PDSCH, and determine that the UE uses the combined information as the third feedback information corresponding to the PDSCH

[0268] For mode C4', the base station determines that the UE determines the third feedback information that needs to be fed back in the uplink subframe n in the following manner:

[0269] The base station determines that the UE generates 1-bit ACK/NACK information for the one PDSCH received on the PCC that does not have a corresponding PDCCH/EPDCCH;

[0270] The base station determines that the UE generates 1-bit ACK/NACK information for the one PDCCH/EPDCCH received on the PCC that indicates the release of downlink SPS resources;

[0271] The base station determines that the UE generates 1-bit ACK/NACK information for each TB in a PDSCH with a corresponding PDCCH/EPDCCH received on the PCC, and uses the ACK/NACK information corresponding to all TBs in the PDSCH as the PDSCH correspondence Or, the base station determines that the UE generates 1-bit ACK/NACK information for a PDSCH with a corresponding PDCCH/EPDCCH received on the PCC. When the PDSCH contains at least two TBs, the base station determines that the UE has Each TB in the PDSCH generates 1-bit ACK/NACK information, the ACK/NACK information corresponding to all TBs in the PDSCH is combined, and the 1-bit ACK/NACK information obtained after the combined processing is used as the first corresponding to the PDSCH. Three feedback information; or, if the number of bits of the second feedback information is greater than 3, the base station determines that the UE generates 1 bit ACK/NACK information for each TB in a PDSCH with a corresponding PDCCH/EPDCCH received on the PCC The ACK/NACK information corresponding to all TBs in the PDSCH is combined, and the 1-bit ACK/NACK information obtained after the combined processing is used as the third feedback information corresponding to the PDSCH. If the bit of the second feedback information is If the number is not more than 3, the base station determines that the UE generates 1-bit ACK/NACK information for each TB in the PDSCH with the corresponding PDCCH/EPDCCH received on the PCC, and sends the ACK/NACK information corresponding to all TBs in the PDSCH As the third feedback information corresponding to the PDSCH.

[0272] Specifically, in the second way, when the base station determines the third feedback information sent by the UE in the following way:

[0273] The base station determines that the UE separately determines the received 1-bit ACK/NACK information corresponding to the PDCCH/EPDCCH used to indicate the release of downlink SPS resources and the 1-bit ACK/NACK information corresponding to the PDSCH that does not have the corresponding PDCCH/EPDCCH. Bit ACK/NACK information is used as the third feedback information;

[0274] Since the third method corresponds to the third method mentioned above, please refer to the description of the third method for details, which will not be repeated here.

[0275] Specifically, in the third manner, the base station determines that the UE determines the third feedback information sent by the UE in the following manner:

[0276] As an implementation manner, if the PDSCH with the corresponding PDCCH/EPDCCH only contains 1 TB, the base station determines that the UE respectively determines the 1-bit ACK/NACK information and the information corresponding to the 1 TB in the PDSCH with the corresponding PDCCH/EPDCCH. 1 bit ACK/NACK information corresponding to the PDSCH with the corresponding PDCCH/EPDCCH, and use all the obtained ACK/NACK information as the third feedback information;

[0277] As another implementation manner, if the PDSCH with the corresponding PDCCH/EPDCCH contains multiple TBs, the base station determines that the UE respectively determines the 1-bit ACK/NACK information corresponding to each TB in the PDSCH with the corresponding PDCCH/EPDCCH and does not have The 1-bit ACK/NACK information corresponding to the PDSCH of the corresponding PDCCH/EPDCCH, and all the obtained ACK/NACK information is used as the third feedback information;

[0278] As yet another implementation manner, if the PDSCH with the corresponding PDCCH/EPDCCH contains at least two TBs, the base station determines that the UE separately determines the 1-bit ACK/NACK information and the non-compatibility for each TB in the PDSCH with the corresponding PDCCH/EPDCCH. The 1-bit ACK/NACK information corresponding to the PDSCH with the corresponding PDCCH/EPDCCH, determine that the UE will combine the ACK/NACK information corresponding to each TB with the corresponding PDCCH/EPDCCH PDSCH, and determine that the UE will combine the ACK/NACK information to obtain The 1-bit ACK/NACK information is used as the 1-bit ACK/NACK information corresponding to the PDSCH with the corresponding PDCCH/EPDCCH and the 1-bit ACK/NACK information obtained after the UE will combine the processing and the PDSCH without the corresponding PDCCH/EPDCCH 1-bit ACK/NACK information is used as the third feedback information.

[0279] Because mode four’ corresponds to mode four above, please refer to the description of mode four for details, which will not be repeated here.

[0280] Further, in step 22a and step 22b, the base station determines whether the UE will retransmit the uplink data according to the second feedback information, which specifically includes:

[0281] If the base station determines that the content of the first feedback information of at least one base station participating in the UE's coordinated transmission is ACK based on the content of the second feedback information, the base station determines that the UE will not retransmit the uplink data; and

[0282] If the base station determines, based on the content of the second feedback information, that the content of the first feedback information of all base stations participating in the UE's coordinated transmission is NACK, and the current number of retransmissions of the UE is less than the set maximum number of retransmissions, the base station determines the The UE will retransmit the uplink data.

[0283] Further, in step 22a, the base station determines whether it needs to retransmit corresponding downlink data according to the third feedback information, which specifically includes:

[0284] If the content of the third feedback information is ACK, the base station determines that it does not need to retransmit corresponding downlink data; and

[0285] If the content of the third feedback information is NACK and its current number of retransmissions is less than the set maximum number of retransmissions, the base station determines that it needs to retransmit corresponding downlink data.

[0286] It should be noted that in the embodiment of the present invention, figure 1 (Send) and figure 2 (Receive) A process can be synthesized to form a method of transmitting feedback information, that is, first perform step 11 to step 13, and then perform step 21 to step 23.

[0287] The processing flow of the above method can be implemented by a software program, which can be stored in a storage medium, and when the stored software program is called, the above method steps are executed.

[0288] Based on the same inventive concept, an embodiment of the present invention also provides a user equipment. Since the user equipment solves the problem in principle and figure 1 The methods shown are similar, so the implementation of this user equipment can be found in figure 1 The implementation of the shown method will not be repeated here.

[0289] See image 3 As shown, a user equipment provided by an embodiment of the present invention includes:

[0290] The first processing module 31 is configured to determine the second feedback information that needs to be fed back in the uplink subframe n according to the feedback timing relationship corresponding to the second feedback information, where the second feedback information is used to indicate whether the UE will participate in the UE The same uplink data received by each base station for coordinated transmission is retransmitted, and the second feedback information includes M 1 The second feedback information corresponding to each downlink subframe in each downlink subframe is based on the second feedback information corresponding to each downlink subframe. 1 The first feedback information received in each of the downlink subframes received from each base station participating in the coordinated transmission of the UE is obtained, and the first feedback information is used to indicate whether the base station participating in the coordinated transmission of the UE is The same uplink data sent by the UE is correctly received, M 1 The two downlink subframes are the downlink subframes that are determined according to the feedback timing relationship corresponding to the second feedback information and need to feed back the second feedback information in the uplink subframe n;

[0291] The sending module 32 is configured to send the second feedback information through the physical uplink control channel PUCCH and/or the physical uplink shared channel PUSCH in the uplink subframe n.

[0292] Further, the user equipment also includes:

[0293] The second processing module 33 is configured to determine the third feedback information that needs to be fed back in the uplink subframe n according to the feedback timing relationship corresponding to the third feedback information, where the third feedback information includes M 2 The third feedback information corresponding to each downlink subframe in each downlink subframe is used to indicate whether the downlink data in the downlink subframe is received correctly, M 2 The two downlink subframes are the downlink subframes that are determined according to the feedback timing relationship corresponding to the third feedback information and need to feed back the third feedback information in the uplink subframe n;

[0294] The sending module 32 is further configured to simultaneously send the second feedback information and the third feedback information through the PUCCH and/or PUSCH in the uplink subframe n.

[0295] Further, the user equipment also includes:

[0296] The judging module 34 is configured to judge whether the third feedback information needs to be fed back in the uplink subframe n;

[0297] If the judgment result of the judgment module is yes, the judgment module 34 triggers the second processing module 33 to execute the feedback timing relationship corresponding to the third feedback information, determines the third feedback information that needs to be fed back in the uplink subframe n, and triggers the sending module 32 to execute In the uplink subframe n, the second feedback information and the third feedback information are simultaneously sent through PUCCH and/or PUSCH;

[0298] If the judgment result is no, the sending module 32 is specifically configured to: in the uplink subframe n, send the second feedback information on the PUCCH channel resource pre-configured by higher layer signaling or the PUCCH channel resource obtained according to the PDCCH/EPDCCH; or, The second feedback information is sent on the PUSCH in a punctured mapping manner.

[0299] Further, if the judgment result is no, the sending module 32 is specifically configured to:

[0300] When the number of bits of the second feedback information does not exceed 2 bits, use the PUCCH format 1a/1b scheme to send the second feedback information on the PUCCH format 1a/1b channel resource; or,

[0301] When the number of bits of the second feedback information does not exceed 4 bits, use the PUCCH format 1b PUCCH format 1b with channel selection scheme combined with channel selection to send the second feedback information, and transmit the bits of the second feedback information according to the PUCCH format 1b with channel selection scheme The ACK/NACK mapping table used by the length of the feedback information determines the channel resource and transmission bit corresponding to the second feedback information, and uses the PUCCH format 1b scheme to transmit the determined transmission bit on the determined channel resource; or,

[0302] The second feedback information is sent using the PUCCH format3 scheme.

[0303] Further, the sending module 32 further includes:

[0304] Simultaneously send the second feedback information and the third feedback information through PUCCH;

[0305] When there is PUSCH transmission in the uplink subframe n, simultaneously send the second feedback information and the third feedback information through the PUSCH;

[0306] PUSCH transmission exists in uplink subframe n, and it supports simultaneous transmission of PUCCH and PUSCH in the same uplink subframe; the second feedback information is sent through PUCCH, and the third feedback information is sent through PUSCH; or the second feedback is sent through PUSCH Information, and send the third feedback information through PUCCH.

[0307] Further, the sending module 32 is specifically used for:

[0308] Use the PUCCH format 1b scheme to simultaneously send 2-bit feedback information composed of the second feedback information and the third feedback information cascaded, where the second feedback information and the third feedback information both include 1-bit information, and the channel resources used by PUCCH format 1b It is the channel resource obtained by the channel resource acquisition method used when the third feedback information is transmitted using the PUCCH format 1b scheme specified in the 3GPP protocol, or the channel resource pre-configured by high-level signaling;

[0309] The second processing module 33 is specifically used for:

[0310] When receiving at least two TBs in a downlink subframe, generate 1-bit ACK/NACK information for each TB in the downlink subframe, and combine the ACK/NACK information corresponding to all TBs in the downlink subframe Processing, and use the 1-bit ACK/NACK information obtained after the merging processing as the third feedback information corresponding to the downlink subframe.

[0311] Further, the sending module 32 is specifically used for:

[0312] Using the PUCCH format1b with channel selection scheme, the second feedback information and the third feedback information are sent simultaneously according to any of the following methods:

[0313] Method B1. The second feedback information and the third feedback information are cascaded to obtain a feedback information sequence of (A+C) bits; according to the PUCCH format 1b with channel selection scheme, the feedback information with a bit length of (A+C) is transmitted. Use the ACK/NACK mapping table to determine the channel resources and transmission bits corresponding to the feedback information sequence; on the determined channel resources, use the PUCCHformat1b scheme to send the determined transmission bits; where the second feedback information includes A bit information, Three feedback information includes C-bit information, A and C are positive integers, and (A+C) is not greater than 4; or

[0314] Method B2, according to the second feedback information, obtain the first information sequence of Max (A, C) bits, when A

[0315] Further, the second processing module 32 is specifically configured to:

[0316] For method B1, for M 2 Each TB in each downlink subframe in a downlink subframe generates 1-bit ACK/NACK information, and uses the ACK/NACK information corresponding to all TBs in a downlink subframe as the third feedback corresponding to the downlink subframe Information; or

[0317] To M 2 Each downlink subframe in a downlink subframe generates 1-bit ACK/NACK information. When at least two TBs are received in a downlink subframe, a 1-bit ACK/NACK is generated for each TB in the downlink subframe. Information, the ACK/NACK information corresponding to all TBs in the downlink subframe is combined, and the 1-bit ACK/NACK information obtained after the combined processing is used as the third feedback information corresponding to the downlink subframe; or

[0318] If (2×M 2 +A) is greater than 4, for M 2 Each downlink subframe in a downlink subframe generates 1-bit ACK/NACK information. When at least two TBs are received in a downlink subframe, a 1-bit ACK/NACK is generated for each TB in the downlink subframe. Information, the ACK/NACK information corresponding to all TBs in the downlink subframe is combined, and the 1-bit ACK/NACK information obtained after the combined processing is used as the third feedback information corresponding to the downlink subframe; if (2× M 2 +A) is not greater than 4, for M 2 Each TB in each downlink subframe in a downlink subframe generates 1-bit ACK/NACK information, and uses the ACK/NACK information corresponding to all TBs in a downlink subframe as the third feedback corresponding to the downlink subframe information.

[0319] Further, the sending module 32 is specifically used for:

[0320] Using the PUCCH format3 solution, the second feedback information and the third feedback information are sent at the same time according to any of the following methods:

[0321] Method C1. The second feedback information and the third feedback information are cascaded, and the cascaded information sequence is jointly encoded; the channel resource used to transmit the second feedback information and the third feedback information is determined; The channel resources of the sender to send the jointly coded coding information; or

[0322] Method C2: Independently encode the second feedback information and the third feedback information respectively; determine the channel resource used to transmit the second feedback information and the third feedback information; send the independently encoded encoded information through the determined channel resource.

[0323] Further, the second processing module 32 is specifically configured to:

[0324] It is determined that the channel resource used for transmitting the second feedback information and the third feedback information is at least one PUCCH format 3 channel resource pre-configured for itself by higher layer signaling; or

[0325] According to M 2 The indication information used to indicate the bit field of the ACK/NACK resource in the PDCCH/EPDCCH received in two downlink subframes is used to determine the channel resource used to transmit the second feedback information and the third feedback information, where the channel resource is At least one PUCCH format 3 channel resource among the multiple PUCCH format 3 channel resources pre-configured by the higher layer signaling.

[0326] Further, the sending module 32 is also used for:

[0327] If you are in M 2 If the PDCCH/EPDCCH is not received in each downlink subframe, the second feedback information and the third feedback information are simultaneously sent through the PUCCH in one of the following ways:

[0328] Method 1: For FDD system or TDD system, if only one physical downlink shared channel PDSCH or one PDCCH/EPDCCH for indicating the release of downlink SPS resources is received on the PCC, the PDSCH or the PDCCH indicating the release of downlink SPS resources is released The ACK/NACK feedback information corresponding to the /EPDCCH is used as the third feedback information, and the second feedback information and the third feedback information are sent simultaneously using method C3 or method C4;

[0329] Method 2: For a TDD system, if it receives a PDCCH/EPDCCH indicating the release of downlink SPS resources and a PDSCH without corresponding PDCCH/EPDCCH on the PCC, the PDCCH/EPDCCH indicating the release of downlink SPS resources and The ACK/NACK feedback information corresponding to the PDSCH that does not have the corresponding PDCCH/EPDCCH is used as the third feedback information, and the second feedback information and the third feedback information are sent at the same time by using method C4;

[0330] Manner 3: For the TDD system, if it receives a PDSCH without a corresponding PDCCH/EPDCCH and a PDSCH with a corresponding PDCCH/EPDCCH on the PCC, the PDSCH without the corresponding PDCCH/EPDCCH and the PDSCH with the corresponding PDCCH/EPDCCH The ACK/NACK feedback information corresponding to the PDSCH of the PDCCH/EPDCCH is used as the third feedback information, and the second feedback information and the third feedback information are simultaneously sent by way of C4;

[0331] Among them, the method C3 is specifically: using the PUCCH format1b scheme to simultaneously send 2-bit feedback information composed of the second feedback information and the third feedback information cascade, where the channel resource used by PUCCH format1b is the PUCCH format1b specified in the 3GPP protocol The channel resource obtained by the channel resource acquisition method adopted when the solution transmits the third feedback information, or the channel resource pre-configured by high-layer signaling, the second feedback information and the third feedback information are both 1 bit;

[0332] Method C4 is specifically: using the PUCCH format 1b with channel selection scheme, and sending the second feedback information and the third feedback information at the same time according to the following steps: the second feedback information and the third feedback information are cascaded to obtain (A+C) Bit feedback information sequence; according to the ACK/NACK mapping table used to transmit the feedback information with bit length (A+C) in the PUCCH format 1b with channel selection scheme, determine the channel resources and transmission bits corresponding to the feedback information sequence; On the channel resources of, use the PUCCH format1b scheme to send the determined transmission bits; where the second feedback information includes A bit information, the third feedback information includes C bit information, A and C are positive integers, and (A+C) is not greater than 4;

[0333] The second processing module is also used for:

[0334] For method C3, a 1-bit ACK/NACK message is generated for a PDSCH received on the PCC or a PDCCH/EPDCCH indicating the release of downlink SPS resources. When at least two TBs are received in the PDSCH, the information in the PDSCH is Each TB generates 1-bit ACK/NACK information, combines the ACK/NACK information corresponding to all TBs in the PDSCH, and uses the 1-bit ACK/NACK information obtained after the merging process as the third feedback information corresponding to the PDSCH ;

[0335] For method C4, generate 1-bit ACK/NACK information for a PDSCH received on the PCC that does not have a corresponding PDCCH/EPDCCH;

[0336] Generate 1-bit ACK/NACK information for a PDCCH/EPDCCH that indicates the release of downlink SPS resources received on the PCC;

[0337] Generate 1-bit ACK/NACK information for each TB in a PDSCH with a corresponding PDCCH/EPDCCH received on the PCC, and use the ACK/NACK information corresponding to all TBs in the PDSCH as the third corresponding to the PDSCH Feedback information; or, generate 1-bit ACK/NACK information for a PDSCH with a corresponding PDCCH/EPDCCH received on the PCC, when the PDSCH contains at least two TBs, generate 1 bit for each TB in the PDSCH ACK/NACK information, the ACK/NACK information corresponding to all TBs in the PDSCH is combined, and the 1-bit ACK/NACK information obtained after the combined processing is used as the third feedback information corresponding to the PDSCH; or, if the second The number of bits of the feedback information is greater than 3. For each TB in a PDSCH with a corresponding PDCCH/EPDCCH received on the PCC, 1 bit ACK/NACK information is generated, and ACK/NACK information corresponding to all TBs in the PDSCH Perform the merging process, and use the 1-bit ACK/NACK information obtained after the merging process as the third feedback information corresponding to the PDSCH. If the number of bits of the second feedback information is not greater than 3, the corresponding PDCCH received on the PCC Each TB in the PDSCH of the /EPDCCH generates 1-bit ACK/NACK information, and uses the ACK/NACK information corresponding to all TBs in the PDSCH as the third feedback information corresponding to the PDSCH.

[0338] Based on the same inventive concept, the embodiment of the present invention also provides a base station that participates in the cooperative transmission of the UE. Since the base station solves the problem in principle and figure 2 The methods shown are similar, so the implementation of this base station can be found in figure 2 The implementation of the shown method will not be repeated here.

[0339] See Figure 4 As shown, the base station participating in UE's coordinated transmission provided by the embodiment of the present invention includes:

[0340] The first determining module 41 is configured to determine the number of bits of the second feedback information fed back by the UE in the uplink subframe n according to the feedback timing relationship corresponding to the second feedback information, and the number of bits of the second feedback information is M 1 The sum of the number of bits of the second feedback information corresponding to each downlink subframe in two downlink subframes. The second feedback information corresponding to each downlink subframe is the UE according to the number of bits received in the downlink subframe. The first feedback information fed back by the base station for coordinated transmission is obtained, and the first feedback information is used to indicate whether the base station participating in the coordinated transmission of the UE correctly receives the same uplink data sent by the UE, M 1 The two downlink subframes are the downlink subframes that are determined according to the feedback timing relationship corresponding to the second feedback information and need to feed back the second feedback information in the uplink subframe n;

[0341] The receiving module 42 is configured to receive the second feedback information through PUCCH and/or PUSCH in the uplink subframe n, and determine whether the UE performs uplink data retransmission according to the second feedback information.

[0342] Further, the base station also includes:

[0343] The second determining module 43 is configured to determine the number of bits of the third feedback information that the UE needs to feed back in the uplink subframe n according to the feedback timing relationship corresponding to the third feedback information, where the number of bits of the third feedback information is M 2 The sum of the number of bits of the third feedback information corresponding to each downlink subframe in each downlink subframe, M 2 The third feedback information corresponding to each downlink subframe in each downlink subframe is used to indicate whether the downlink data in the downlink subframe is received correctly, M 2 The two downlink subframes are the downlink subframes that are determined according to the feedback timing relationship corresponding to the third feedback information and need to feed back the third feedback information in the uplink subframe n;

[0344] The receiving module is further configured to: in the uplink subframe n, simultaneously receive the second feedback information and the third feedback information through the PUCCH and/or PUSCH, and determine whether the UE retransmits the uplink data according to the second feedback information, and according to the first 3. The feedback information determines whether to retransmit the downlink data.

[0345] Further, the base station also includes:

[0346] The determining module 44 is configured to determine whether the third feedback information needs to be received in the uplink subframe n;

[0347] If the judgment result is yes, the judgment module 44 triggers the second determination module 43 to execute the feedback timing relationship corresponding to the third feedback information to determine the number of bits of the third feedback information that the UE needs to feed back in the uplink subframe n; and trigger the receiving module 42. In the uplink subframe n, the second feedback information and the third feedback information are simultaneously received through PUCCH and/or PUSCH, and the second feedback information is used to determine whether the UE performs uplink data retransmission, and the third feedback information is used to determine Whether to retransmit downlink data by itself;

[0348] If the judgment result is no, the receiving module 42 is specifically configured to: in the uplink subframe n, receive the second feedback information on the PUCCH channel resource pre-configured through higher layer signaling or the PUCCH channel resource obtained according to the PDCCH/EPDCCH; or, The second feedback information is received on the PUSCH in a punctured mapping manner.

[0349] Further, the receiving module 42 is specifically used for:

[0350] When the number of bits of the second feedback information does not exceed 2 bits, on the PUCCH format 1a/1b channel resources, adopt the PUCCH format 1a/1b scheme to receive the second feedback information; or,

[0351] When the number of bits of the second feedback information does not exceed 4 bits, the PUCCH format1b withchannel selection scheme is used to receive the second feedback information, which specifically includes: the base station uses the PUCCH format1b scheme on all channel resources participating in channel selection to receive the transmission bits sent by the UE, Determine the channel resource where the received transmission bit is located, and determine the ACK/NACK mapping table used for the feedback information of the bit length of the second feedback information according to the PUCCH format1b with channel selection scheme, determine the received transmission bit and where the transmission bit is located The second feedback information corresponding to the channel resource; or,

[0352] Use PUCCH format 3 to receive the second feedback information.

[0353] Further, the receiving module 42 further includes:

[0354] Receive the second feedback information and the third feedback information simultaneously via PUCCH; or

[0355] If there is PUSCH transmission in the uplink subframe n, simultaneously receive the second feedback information and the third feedback information through the PUSCH; or

[0356] If there is PUSCH transmission in uplink subframe n, and the UE supports simultaneous transmission of PUCCH and PUSCH in the same uplink subframe, the second feedback information is received through PUCCH, and the third feedback information is received through PUSCH, or the second feedback is received through PUSCH Information, and receive the third feedback information through the PUCCH.

[0357] Further, the receiving module 42 is specifically used for:

[0358] The PUCCH format1b scheme is used to simultaneously receive 2-bit feedback information composed of the second feedback information and the third feedback information cascaded, where the second feedback information and the third feedback information are both 1 bit, and the channel resources used by PUCCH format1b are according to The channel resource obtained by the channel resource acquisition method specified in the 3GPP protocol when the PUCCHformat1b scheme is used to transmit the third feedback information, or the PUCCH channel resource pre-configured for high-level signaling;

[0359] The second determining module determines that the UE determines the third feedback information that needs to be fed back in the uplink subframe n in the following manner: if it sends at least two TBs to the UE in a downlink subframe, the base station determines that the UE has this downlink subframe The ACK/NACK information corresponding to each TB in TB is combined, and the 1-bit ACK/NACK information obtained after the combined processing is used as the third feedback information corresponding to the downlink subframe.

[0360] Further, the receiving module 42 is specifically used for:

[0361] The PUCCH format1b with channel selection scheme is adopted, and the second feedback information and the third feedback information are simultaneously received according to any of the following methods:

[0362] Method B1. Use the PUCCH format1b scheme to receive the transmission bits sent by the UE on all channel resources participating in channel selection, and determine the channel resource where the received transmission bits are located. According to the PUCCH format1b with channel selection scheme, the transmission bit length is (A+C ) The ACK/NACK mapping table used for the feedback information to determine the (A+C) bits of the (A+C) bits obtained by cascading the second feedback information and the third feedback information corresponding to the received transmission bit and the channel resource where the transmission bit is located Feedback information sequence; wherein, the second feedback information includes A bit information, and the third feedback information includes C bit information, A and C are positive integers, and (A+C) is not greater than 4; or

[0363] Method B2. Use the PUCCH format1b scheme to receive transmission bits on all channel resources participating in channel selection, determine the channel resource where the received transmission bits are located, and transmit 2 bits with a length of Max(A,C) according to the PUCCH format1bwith channel selection scheme The ACK/NACK mapping table used for the feedback information determines the two feedback information sequences corresponding to the received transmission bit and the channel resource where the transmission bit is located; wherein, one of the two feedback information sequences is based on the UE The first information sequence of Max (A, C) bits obtained from the second feedback information, when A

[0364] Further, for method B1, the second determining module 43 determines according to the following steps that the UE determines the third feedback information that needs to be fed back in the uplink subframe n in the following manner:

[0365] Determine UE to M 2 Each TB in each downlink subframe in each downlink subframe generates 1-bit ACK/NACK information, and the UE uses the ACK/NACK information corresponding to all TBs in one downlink subframe as the third corresponding to the downlink subframe. Feedback information; or

[0366] Determine UE to M 2 Each downlink subframe in a downlink subframe generates 1-bit ACK/NACK information. When it sends at least two TBs to the UE in a downlink subframe, it is determined that the UE has at least two TBs in the downlink subframe. The corresponding ACK/NACK information is combined and the UE uses the combined information as the third feedback information corresponding to the downlink subframe; or

[0367] If (2×M 2 +A) is greater than 4, it is determined that UE is 2 Each downlink subframe in a downlink subframe generates 1-bit ACK/NACK information. When it sends at least two TBs to the UE in a downlink subframe, it is determined that the UE has at least two TBs in the downlink subframe. The corresponding ACK/NACK information is combined and the UE uses the combined information as the third feedback information corresponding to the downlink subframe; if (2×M 2 +A) is not greater than 4, confirm that UE is 2 Each TB in each downlink subframe in a downlink subframe generates 1-bit ACK/NACK information and the UE uses the ACK/NACK information corresponding to all TBs in a downlink subframe as the third feedback corresponding to the downlink subframe information.

[0368] Further, the receiving module 42 is specifically used for:

[0369] Using PUCCH format 3, according to any of the following methods, the second feedback information and the third feedback information are simultaneously received:

[0370] Method C1: Determine the channel resource used to transmit the second feedback information and the third feedback information; on the determined channel resource, adopt a joint decoding method to receive the second feedback information and the third feedback information; or

[0371] Method C2: Determine the channel resource used to transmit the second feedback information and the third feedback information; on the determined channel resource, the second feedback information and the third feedback information are received in an independent decoding manner.

[0372] Further, the receiving module 42 is also used for:

[0373] It is determined that the channel resource used for transmitting the second feedback information and the third feedback information is at least one PUCCH format 3 channel resource pre-configured to the UE by higher layer signaling; or

[0374] Determine the channel resource used to transmit the second feedback information and the third feedback information according to the indication information of the bit field used to indicate the ACK/NACK resource in the PDCCH/EPDCCH sent to the UE, where the channel resource is pre-configured for higher layer signaling At least one PUCCH format 3 channel resource among the multiple PUCCH format 3 channel resources of the UE.

[0375] Further, the receiving module 42 is also used for:

[0376] When determining the channel resource used to transmit the second feedback information and the third feedback information according to the indication information of the bit field used to indicate the ACK/NACK resource in the PDCCH/EPDCCH sent to the UE, if you are in M 2 No PDCCH/EPDCCH is sent to the UE in two downlink subframes or the UE is determined to be in M 2 If the PDCCH/EPDCCH is not received in each downlink subframe, the second feedback information and the third feedback information are simultaneously received through the PUCCH in one of the following ways:

[0377] Method 1: For a frequency division duplex FDD system or a time division duplex TDD system, if it only sends a PDSCH or a PDCCH/EPDCCH to indicate the release of downlink SPS resources to the UE on the primary component carrier PCC of the UE, determine the first 3. The feedback information only includes the ACK/NACK feedback information corresponding to the PDSCH or the PDCCH/EPDCCH indicating the release of the downlink SPS resource, and the second feedback information and the third feedback information are simultaneously received by means C3 or C4;

[0378] Method 2: For the TDD system, if the UE sends a PDCCH/EPDCCH indicating the release of downlink SPS resources and a PDSCH without a corresponding PDCCH/EPDCCH on the PCC of the UE, it is determined that the third feedback information only includes the indication The ACK/NACK feedback information corresponding to the PDCCH/EPDCCH released by the downlink SPS resource and the PDSCH without the corresponding PDCCH/EPDCCH, and the second feedback information and the third feedback information are simultaneously received by way of C4;

[0379] Manner 3: For the TDD system, if the UE sends a PDSCH without a corresponding PDCCH/EPDCCH and a PDSCH with a corresponding PDCCH/EPDCCH on the PCC of the UE, it is determined that the third feedback information only includes those that do not have a corresponding The PDSCH of the PDCCH/EPDCCH and the ACK/NACK feedback information corresponding to the PDSCH with the corresponding PDCCH/EPDCCH, and the second feedback information and the third feedback information are simultaneously received by way of C4;

[0380] Among them, the method C3 is specifically: using the PUCCH format 1b scheme to simultaneously receive 2-bit feedback information formed by the cascade of the second feedback information and the third feedback information, where the second feedback information and the third feedback information are both 1 bit, where, The channel resource used by PUCCH format 1b is the channel resource obtained by the channel resource acquisition method used when the PUCCH format 1b scheme is used to transmit the third feedback information according to the 3GPP protocol, or the channel resource pre-configured by high-level signaling;

[0381] Method C4 is specifically: adopting the PUCCH format1b with channel selection scheme, and receiving the second feedback information and the third feedback information at the same time according to the following steps: adopting the PUCCH format1b scheme to receive data on all channel resources participating in channel selection, and determine the received transmission Bit and the channel resource where the transmission bit is located, according to the ACK/NACK mapping table used to transmit the feedback information with bit length (A+C) in the PUCCH format1b with channel selection scheme, determine the received transmission bit and the transmission bit location The second feedback information corresponding to the channel resource and the third feedback information are cascaded to obtain the (A+C) bit feedback information sequence; where the second feedback information includes A bit information, the third feedback information includes C bit information, and A , C is a positive integer, and (A+C) is not greater than 4;

[0382] The second determining module 43 determines that the UE determines the third feedback information that needs to be fed back in the uplink subframe n in the following manner:

[0383] For method C3, it is determined that the UE generates 1-bit ACK/NACK information for a PDSCH received on the PCC or a PDCCH/EPDCCH indicating the release of downlink SPS resources, and when it sends at least two TBs to the UE in the PDSCH, Determine that the UE performs merging processing on the ACK/NACK information corresponding to each TB in the PDSCH, and use the information obtained after the merging processing as the third feedback information corresponding to the PDSCH;

[0384] For method C4, it is determined that the UE generates 1-bit ACK/NACK information for a PDSCH received on the PCC that does not have a corresponding PDCCH/EPDCCH;

[0385] Determine that the UE generates 1-bit ACK/NACK information for a PDCCH/EPDCCH received on the PCC that indicates the release of downlink SPS resources;

[0386] Determine that the UE generates 1-bit ACK/NACK information for each TB in a PDSCH with a corresponding PDCCH/EPDCCH received on the PCC, and use the ACK/NACK information corresponding to all TBs in the PDSCH as the corresponding PDSCH The third feedback information; or, it is determined that the UE generates 1-bit ACK/NACK information for a PDSCH with a corresponding PDCCH/EPDCCH received on the PCC. When the PDSCH contains at least two TBs, it is determined that the UE is Each TB generates 1-bit ACK/NACK information, combines the ACK/NACK information corresponding to all TBs in the PDSCH, and uses the 1-bit ACK/NACK information obtained after the merging process as the third feedback information corresponding to the PDSCH Or, if the number of bits of the second feedback information is greater than 3, it is determined that the UE generates 1-bit ACK/NACK information for each TB in a PDSCH with a corresponding PDCCH/EPDCCH received on the PCC, and the PDSCH The ACK/NACK information corresponding to all TBs are combined, and the 1-bit ACK/NACK information obtained after the combined processing is used as the third feedback information corresponding to the PDSCH. If the number of bits of the second feedback information is not greater than 3, it is determined that the UE is Each TB in the PDSCH with the corresponding PDCCH/EPDCCH received on the PCC generates 1-bit ACK/NACK information, and uses the ACK/NACK information corresponding to all TBs in the PDSCH as the third feedback information corresponding to the PDSCH .

[0387] Based on the above embodiments, the embodiments of the present invention also provide a communication system, see Figure 5 As shown, the communication system includes:

[0388] The UE 51 is configured to determine the second feedback information that needs to be fed back in the uplink subframe n according to the feedback timing relationship corresponding to the second feedback information, where the second feedback information is used to indicate whether the UE will participate in the coordinated transmission of the UE The same uplink data received by each base station in the base station is retransmitted, and the second feedback information includes M 1 The second feedback information corresponding to each downlink subframe in each downlink subframe is based on the second feedback information corresponding to each downlink subframe. 1 The first feedback information received in each of the downlink subframes received from each base station participating in the coordinated transmission of the UE is obtained, and the first feedback information is used to indicate whether the base station participating in the coordinated transmission of the UE is The same uplink data sent by the UE is correctly received, M 1 The two downlink subframes are determined according to the feedback timing relationship corresponding to the second feedback information and need to feed back the second feedback information in the uplink subframe n; and in the uplink subframe n, through the physical uplink control channel PUCCH and / Or physical uplink shared channel PUSCH to send the second feedback information;

[0389] The base station 52 participating in the coordinated transmission of the UE is configured to determine the number of bits of the second feedback information fed back by the UE in the uplink subframe n according to the feedback timing relationship corresponding to the second feedback information; and in the uplink subframe n, pass The PUCCH and/or PUSCH receives the second feedback information, and determines whether the UE performs uplink data retransmission according to the second feedback information.

[0390] In the embodiment of the present invention, the base stations participating in the cooperative transmission of the UE include the serving base station of the UE and at least one cooperative base station.

[0391] Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0392] The present invention is described with reference to flowcharts and/or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and/or block in the flowchart and/or block diagram, and the combination of processes and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing equipment to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing equipment can be generated In the process Figure one Process or multiple processes and/or boxes Figure one A device with functions specified in a block or multiple blocks.

[0393] These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device. The device is implemented in the process Figure one Process or multiple processes and/or boxes Figure one Functions specified in a box or multiple boxes.

[0394] These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment. Instructions are provided to implement the process Figure one Process or multiple processes and/or boxes Figure one Steps of functions specified in a box or multiple boxes.

[0395] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0396] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. In this way, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.