WO2021036737A1 - 数据传输方法、用户终端及计算机可读存储介质 - Google Patents

数据传输方法、用户终端及计算机可读存储介质 Download PDF

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Publication number
WO2021036737A1
WO2021036737A1 PCT/CN2020/107626 CN2020107626W WO2021036737A1 WO 2021036737 A1 WO2021036737 A1 WO 2021036737A1 CN 2020107626 W CN2020107626 W CN 2020107626W WO 2021036737 A1 WO2021036737 A1 WO 2021036737A1
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Prior art keywords
data
received
response message
multiplexed
base station
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English (en)
French (fr)
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刘萌萌
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Beijing Ziguang Zhanrui Communication Technology Co Ltd
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Beijing Ziguang Zhanrui Communication Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1621—Group acknowledgement, i.e. the acknowledgement message defining a range of identifiers, e.g. of sequence numbers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1896—ARQ related signaling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user

Definitions

  • the present invention relates to the field of communication technology, in particular to a data transmission method, a user terminal and a computer-readable storage medium.
  • UE User Equipment
  • the network can construct a user equipment cooperation group (UE cooperation group) according to criteria such as service requirements and channel status.
  • a user equipment cooperative group includes at least one cooperative UE (Cooperative UE, CUE) and one target UE (Target UE, TUE).
  • user cooperation is divided into two stages: the first stage, the base station sends data packets to the user equipment cooperation group; the second stage, the CUE in the user equipment cooperation group forwards the data packets received from the base station to the TUE.
  • the first stage is on the downlink, and the second stage is on the sidelink.
  • the TUE After the TUE receives the data packet, if it is successfully decoded, it will feed back an Acknowledgement (ACK) message; otherwise, it will feed back a Negative Acknowledgement (NACK) message.
  • ACK Acknowledgement
  • NACK Negative Acknowledgement
  • the existing method of feeding back ACK/NACK messages is only applicable to the case where the user equipment cooperative group contains only one TUE and one CUE.
  • the user equipment cooperative group contains multiple TUEs and one CUE at the same time, how to perform ACK /NACK message feedback, currently unresolved.
  • the problem to be solved by the present invention is how to perform ACK/NACK message feedback when multiple TUEs and one CUE are included in the user equipment cooperative group at the same time.
  • an embodiment of the present invention provides a data transmission method, the method includes: when receiving multiplexed data sent by a base station, processing the multiplexed data to obtain waiting data corresponding to different target terminals. For forwarding data, there are two or more target terminals; sending the data to be forwarded to the corresponding target terminals; receiving response messages sent by each of the target terminals; multiplexing the received response messages; The used response message is sent to the base station.
  • the multiplexing the received response messages includes: arranging the received response messages according to the identity identification number of each target terminal to obtain the multiplexed response messages.
  • the arranging the received response messages according to the identity identification number of each target terminal includes: responding to the received responses in an ascending or descending order of the identity identification number of each target terminal The messages are arranged.
  • the multiplexing the received response messages includes: arranging the received response messages according to the sequence of each of the data to be forwarded in the multiplexed data to obtain the Describe the reply message after multiplexing.
  • the multiplexing the received response message further includes: when the response message sent by the target terminal is not received, adding the response message corresponding to the target terminal to the multiplexed response message.
  • the bit position in the response message is 0.
  • the method further includes: receiving downlink control information sent by the base station based on the multiplexed response message, where the downlink control information is used to indicate data to be retransmitted; and based on the downlink control information To resend the data to be retransmitted.
  • the method further includes: when the data sent by the base station is received, judging whether the received data is multiplexed data.
  • the judging whether the received data is multiplexed data includes: judging whether the received data is multiplexed data based on physical layer signaling sent by the base station for scheduling the data.
  • the embodiment of the present invention also provides a user terminal, the user terminal includes: a data processing unit, which is adapted to process the multiplexed data when the multiplexed data sent by the base station is received to obtain different target terminals respectively For the data to be forwarded, there are more than two target terminals; a data sending unit adapted to send the data to be forwarded to corresponding target terminals respectively; a response message receiving unit adapted to receive responses sent by each of the target terminals Message; a reply message multiplexing unit, adapted to multiplex the received reply message; a reply message sending unit, adapted to send the multiplexed reply message to the base station.
  • a data processing unit which is adapted to process the multiplexed data when the multiplexed data sent by the base station is received to obtain different target terminals respectively For the data to be forwarded, there are more than two target terminals
  • a data sending unit adapted to send the data to be forwarded to corresponding target terminals respectively
  • a response message receiving unit adapted to receive responses
  • the response message multiplexing unit is adapted to arrange the received response messages according to the identification numbers of the target terminals to obtain the multiplexed response messages.
  • the response message multiplexing unit is adapted to arrange the received response messages according to the ascending or descending order of the identity identification number of each target terminal.
  • the response message multiplexing unit is adapted to arrange the received response messages according to the sequence of each of the data to be forwarded in the multiplexed data to obtain the multiplexed data Reply to the message.
  • the reply message multiplexing unit is further adapted to, when the reply message sent by the target terminal is not received, the bit of the reply message corresponding to the target terminal in the multiplexed reply message Position 0.
  • the user terminal further includes: a downlink control information receiving unit, adapted to receive downlink control information sent by the base station based on the multiplexed response message, where the downlink control information is used to indicate that retransmission is to be performed The data; a data retransmission unit, adapted to retransmit the data to be retransmitted based on the downlink control information.
  • a downlink control information receiving unit adapted to receive downlink control information sent by the base station based on the multiplexed response message, where the downlink control information is used to indicate that retransmission is to be performed The data
  • a data retransmission unit adapted to retransmit the data to be retransmitted based on the downlink control information.
  • the user terminal further includes: a judging unit, adapted to judge when the data sent by the base station is received before the multiplexed data is processed when the multiplexed data sent by the base station is received Whether the received data is multiplexed data.
  • a judging unit adapted to judge when the data sent by the base station is received before the multiplexed data is processed when the multiplexed data sent by the base station is received Whether the received data is multiplexed data.
  • the judging unit is adapted to judge whether the received data is multiplexed data based on physical layer signaling sent by the base station for scheduling the data.
  • the embodiment of the present invention also provides a computer-readable storage medium having computer instructions stored thereon, and the computer instructions execute the steps of any one of the above-mentioned methods when the computer instructions are run.
  • An embodiment of the present invention also provides a user terminal, including a memory and a processor, the memory stores computer instructions that can run on the processor, and the processor executes any of the above when the computer instructions are executed. The steps of the described method.
  • the response message sent by each target terminal is received, and the received response message is multiplexed, and then sent to the base station, thereby realizing the user equipment cooperation group
  • ACK/NACK message feedback When multiple TUEs and one CUE are included at the same time, ACK/NACK message feedback.
  • Figure 1 is a flowchart of a data transmission method in an embodiment of the present invention
  • Figure 2 is a schematic diagram of signaling interaction in a data transmission process in an embodiment of the present invention
  • Fig. 3 is a schematic structural diagram of a user terminal in an embodiment of the present invention.
  • the TUE can directly feed back the ACK/NACK message to the base station through the uplink (uplink), or through the side link, the ACK/NACK message can be transmitted first.
  • the NACK message is fed back to the CUE, which is then fed back to the base station via the uplink.
  • the base station needs to send small data packets to multiple wearable devices
  • the base station can multiplex these small data packets and send them to the CUE, which is then decoded by the CUE and forwarded to each TUE respectively.
  • the user equipment The cooperation group contains multiple TUEs and one CUE at the same time, and the relationship between CUE and TUE is one-to-many.
  • the user equipment cooperative group includes multiple TUEs and one CUE at the same time, how to perform ACK/NACK message feedback has not yet been resolved.
  • the present invention provides a data transmission method.
  • the response message sent by each target terminal is received, and the received response message is multiplexed before sending to the base station. Realize the feedback of ACK/NACK messages when the user equipment cooperative group contains multiple TUEs and one CUE at the same time.
  • an embodiment of the present invention provides a data transmission method, and the method may include the following steps:
  • Step 11 When the multiplexed data sent by the base station is received, the multiplexed data is processed to obtain data to be forwarded corresponding to different target terminals.
  • the ACK/NACK message means an ACK message or a NACK message.
  • the TUE successfully receives the data, it feeds back an ACK message, otherwise it feeds back a NACK message.
  • the base station multiplexes the data to be sent to multiple TUEs to form multiplexed data, and sends the multiplexed data to the same CUE.
  • This process uses the downlink, and the multiplexed data is carried by the Physical Downlink Shared Channel (PDSCH).
  • PDSCH Physical Downlink Shared Channel
  • the base station indicates the resource allocation of multiplexed data and the resource allocation of data to be forwarded on the side link through Downlink Control Information (DCI).
  • DCI Downlink Control Information
  • the data to be forwarded corresponding to different TUEs is obtained.
  • the CUE may first determine whether the received data is multiplexed data, and after determining that the received data is multiplexed data, the multiplexed data The data is processed.
  • the CUE may determine whether the received data is multiplexed data based on the physical layer signaling used for scheduling the data sent by the base station.
  • the physical layer signaling may be DCI, of course, it may also be other physical layer signaling.
  • the base station can add a field to the DCI to indicate the number of target terminals. Based on the newly added field in the DCI, the CUE can determine whether the received data is multiplexed data.
  • Step 12 Send the data to be forwarded to corresponding target terminals respectively.
  • the CUE sends the data to be forwarded to the corresponding target terminal through the corresponding side link, and the data to be forwarded is carried by the Physical Sidelink Shared Channel (PSSCH).
  • PSSCH Physical Sidelink Shared Channel
  • the CUE also sends sidelink control information (Sidelink Control Information, SCI) to each TUE respectively.
  • SCI Sidelink Control Information
  • Each side link between TUE and CUE has a corresponding SCI and data to be forwarded.
  • SCI is used to indicate the resource allocation of data to be forwarded.
  • the resource allocation field in the SCI also comes from DCI. For example, when adding domains to DCI, corresponding domains should be added to SCI accordingly.
  • Step 13 Receive response messages sent by each of the target terminals.
  • the TUE feeds back an ACK message or a NACK message to the CUE according to whether the data is successfully received.
  • Each TUE feeds back an ACK/NACK message to the CUE through its side link with the CUE.
  • the TUE can carry 1 bit ACK/NACK messages through the Physical Sidelink Feedback Channel (PSFCH).
  • PSFCH Physical Sidelink Feedback Channel
  • bit 1 may indicate that the TUE successfully received data
  • bit 0 may indicate that the TUE did not successfully receive data. If TUE does not feed back an ACK/NACK message, it may be because TUE missed the detection of SCI.
  • Step 14 multiplexing the received response message.
  • the received response messages may be arranged according to the identity identification number (TUE ID) of each target terminal to obtain the multiplexed response message.
  • TUE ID identity identification number
  • the received response messages may be arranged in the ascending order of the identity identification number of each target terminal, or the received response messages may be arranged in the descending order of the identity identification number of each target terminal. arrangement.
  • the received response messages may also be arranged according to the sequence of each of the data to be forwarded in the multiplexed data to obtain the multiplexed response message .
  • the multiplexing of the received response message may also include:
  • the bit position of the response message corresponding to the target terminal in the multiplexed response message is 0.
  • Step 15 Send the multiplexed response message to the base station.
  • the CUE multiplexes the ACK/NACK messages from each TUE and forwards them to the base station via the uplink.
  • the multiplexed response message has N bits.
  • the multiplexed response message is carried by the Physical Uplink Control Channel (PUCCH).
  • PUCCH Physical Uplink Control Channel
  • the base station After the base station receives the multiplexed response message sent by the CUE, it re-schedules the data, but there is no need to resend the data, and the CUE performs the retransmission of the data.
  • the CUE may receive the downlink control information sent by the base station based on the multiplexed response message, where the downlink control information is used to indicate data to be retransmitted.
  • the CUE retransmits the data to be retransmitted based on the downlink control information.
  • Fig. 2 is a schematic diagram of signaling interaction of a data transmission method in an embodiment of the present invention.
  • Step 201 The base station gNB sends DCI to the CUE.
  • the DCI may be used to indicate the resource allocation of multiplexed data and the resource allocation of data to be forwarded on the side link. Based on the DCI, the CUE can also determine whether the subsequently sent data is multiplexed data.
  • Step 202 The base station gNB sends multiplexed data to the CUE.
  • the CUE After the CUE demultiplexes the received multiplexed data, it obtains 4 pieces of data to be forwarded, and then through step 203 to step 206 respectively, the data that needs to be forwarded to TUE1, TUE2, TUE3, and TUE4, through the corresponding side link, Forward to the corresponding TUE.
  • the CUE also sends the corresponding SCI to each TUE to indicate the resource allocation of the data to be forwarded.
  • steps 203 to 206 can be performed at the same time, that is, the CUE sends data to TUE1 to TUE4 at the same time. Steps 203 to 206 can also be performed sequentially, that is, the CUE sends data to TUE1 to TUE4 in sequence.
  • the specific execution sequence of steps 203 to 206 does not constitute a limitation to the present invention, and all fall within the protection scope of the present invention.
  • TUE1, TUE2, and TUE3 feedback the ACK message to the CUE in step 207, step 208, and step 209, respectively, and TUE4 returns the NACK message to the CUE in step 210 .
  • step 207 to step 210 does not constitute a limitation to the present invention, and all fall within the protection scope of the present invention.
  • the CUE After the CUE receives the response messages fed back from TUE1 to TUE4, they are multiplexed.
  • the received response messages are arranged in ascending order of the TUE identity identification number, and the multiplexed response messages are: 1, 1, 1, 0.
  • the multiplexed data consists of 4 parts of data, part1, part2, part3, and part4, which correspond to TUE3, TUE4, TUE2, and TUE1, respectively. Since only part2 corresponding to TUE4 has not been successfully received, therefore, follow the data to be forwarded
  • the received response messages are arranged, and the multiplexed response messages are: 1, 0, 1, 1.
  • the bit position of the response message corresponding to TUE2 in the multiplexed response message is 0.
  • the multiplexed response message obtained in the ascending order of the TUE identity identification number should be: 1, 0, 1, 0.
  • Arrange according to the descending order of the TUE identification number, the obtained response message after multiplexing should be: 0, 1, 0, 1.
  • Arrange the data to be forwarded in the order of arrangement in the multiplexed data, and the obtained response message after multiplexing should be: 1, 0, 0, 1.
  • the CUE After obtaining the multiplexed response message, in step 211, the CUE sends the multiplexed response message to the base station gNB.
  • the subsequent base station gNB can re-schedule data based on the multiplexed response message.
  • the base station gNB may first indicate the data to be retransmitted to the CUE through DCI (ie, step 212), and then the CUE retransmits the data of TUE4, and instructs the resource allocation of the retransmitted data through the corresponding SCI (ie, step 213).
  • the data transmission method in the embodiment of the present invention receives the response message sent by each target terminal, multiplexes the received response message, and then sends it to the base station to realize the scenario of data packet multiplexing Send feedback of ACK/NACK message.
  • an embodiment of the present invention provides a user terminal 30.
  • the user terminal 30 may include: a data processing unit 31, a data sending unit 32, a response message receiving unit 33, a response message multiplexing unit 34, and a response message sending unit.
  • Unit 35 among them:
  • the data processing unit 31 is adapted to process the multiplexed data when the multiplexed data sent by the base station is received to obtain data to be forwarded corresponding to different target terminals, where there are more than two target terminals;
  • the data sending unit 32 is adapted to send the data to be forwarded to corresponding target terminals respectively;
  • the response message receiving unit 33 is adapted to receive response messages sent by each of the target terminals;
  • the reply message multiplexing unit 34 is adapted to multiplex the received reply message
  • the response message sending unit 35 is adapted to send the multiplexed response message to the base station.
  • the response message multiplexing unit 34 is adapted to arrange the received response messages according to the identification number of each target terminal to obtain the multiplexed response message .
  • the response message multiplexing unit 34 is adapted to arrange the received response messages according to the ascending or descending order of the identity of each target terminal.
  • the response message multiplexing unit 34 is adapted to arrange the received response messages according to the sequence of each of the data to be forwarded in the multiplexed data to obtain The multiplexed response message.
  • the response message multiplexing unit 34 is further adapted to, when the response message sent by the target terminal is not received, send the response message corresponding to the target terminal after the multiplexing.
  • the bit position in the response message is 0.
  • the user terminal 30 may further include: a downlink control information receiving unit (not shown) and a data retransmission unit (not shown). among them:
  • the downlink control information receiving unit is adapted to receive downlink control information sent by the base station based on the multiplexed response message, where the downlink control information is used to indicate data to be retransmitted;
  • the data retransmission unit is adapted to retransmit the data to be retransmitted based on the downlink control information.
  • the user terminal 30 may further include: a judging unit (not shown). Wherein: the judging unit is adapted to judge whether the received data is when the data sent by the base station is received before processing the multiplexed data when the multiplexed data sent by the base station is received Multiplexing data.
  • the judging unit is adapted to judge whether the received data is multiplexed data based on the physical layer signaling used to schedule the data sent by the base station.
  • the embodiment of the present invention also provides another computer-readable storage medium on which computer instructions are stored.
  • the steps of any one of the data transmission methods in the foregoing embodiments are executed, and details are not described herein again.
  • the computer-readable storage medium may include: ROM, RAM, magnetic disk, or optical disk, etc.
  • An embodiment of the present invention also provides a user terminal, the user terminal may include a memory and a processor, the memory stores computer instructions that can run on the processor, and the processor runs the computer instructions.

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Abstract

一种数据传输方法、用户终端及计算机可读存储介质。所述方法包括：当接收到基站发送的复用数据时，对所述复用数据进行处理，得到分别对应不同目标终端的待转发数据，所述目标终端为两个以上；将所述待转发数据分别发送至对应的目标终端；接收各所述目标终端发送的应答消息；对所接收到的应答消息进行复用；将复用后的应答消息发送至所述基站。应用上述方案，可以实现用户设备协作组中同时包含多个TUE及一个CUE的情况下，ACK/NACK消息的反馈。

Description

数据传输方法、用户终端及计算机可读存储介质
本申请要求于2019年8月30日提交中国专利局、申请号为2019108184398、发明名称为“数据传输方法、用户终端及计算机可读存储介质”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域，具体涉及一种数据传输方法、用户终端及计算机可读存储介质。
背景技术
在无线通信网络中，当某些用户设备(User Equipment，UE)处于网络覆盖边缘、处于网络覆盖外(out-of-coverage)、或者周围干扰较大时，可以通过周围其他UE的协助进行数据的发送或接收，以提高用户速率、增强覆盖。
网络可以根据业务需求、信道状态等准则构建用户设备协作组(UE cooperation group)。一个用户设备协作组至少包含一个协作UE(Cooperative UE，CUE)和一个目标UE(Target UE，TUE)。
以下行为例，用户协作分为两个阶段：第一阶段，基站发送数据包给用户设备协作组；第二阶段，用户设备协作组中的CUE把从基站接收到的数据包转发给TUE。
其中，第一阶段是在下行链路(downlink)上，第二阶段是在侧链路(sidelink)上。TUE接收到数据包后，如果成功解码，则反馈确认应答(Acknowledgement，ACK)消息，否则，反馈否定确认应 答(Negative Acknowledgement，NACK)消息。
然而，现有反馈ACK/NACK消息的方法，仅适用于用户设备协作组中仅包含一个TUE及一个CUE的情况，对于用户设备协作组中同时包含多个TUE及一个CUE的情况，如何进行ACK/NACK消息反馈，目前尚未解决。
发明内容
本发明要解决的问题是在用户设备协作组中同时包含多个TUE及一个CUE时，如何进行ACK/NACK消息反馈。
为解决上述问题，本发明实施例提供了一种数据传输方法，所述方法包括：当接收到基站发送的复用数据时，对所述复用数据进行处理，得到分别对应不同目标终端的待转发数据，所述目标终端为两个以上；将所述待转发数据分别发送至对应的目标终端；接收各所述目标终端发送的应答消息；对所接收到的应答消息进行复用；将复用后的应答消息发送至所述基站。
可选地，所述对所接收到的应答消息进行复用，包括：按照各所述目标终端的身份标识号，对所接收到的应答消息进行排列，得到所述复用后的应答消息。
可选地，所述按照各所述目标终端的身份标识号，对所接收到的应答消息进行排列，包括：按照各所述目标终端的身份标识号的升序或降序，对所接收到的应答消息进行排列。
可选地，所述对所接收到的应答消息进行复用，包括：按照各所述待转发数据在所述复用数据中的排列顺序，对所述接收到的应答消息进行排列，得到所述复用后的应答消息。
可选地，所述对所接收到的应答消息进行复用，还包括：当未接收到所述目标终端发送的应答消息时，将所述目标终端对应的应答消息在所述复用后的应答消息中的比特位置0。
可选地，所述方法还包括：接收所述基站基于所述复用后的应答消息，发送的下行控制信息，所述下行控制信息用于指示待重传的数据；基于所述下行控制信息，重新发送所述待重传的数据。
可选地，在所述当接收到基站发送的复用数据时，对所述复用数据进行处理之前，还包括：当接收到基站发送的数据时，判断所接收到的数据是否为复用数据。
可选地，所述判断所接收到的数据是否为复用数据，包括：基于基站发送的用于调度所述数据的物理层信令，判断所接收到的数据是否为复用数据。
本发明实施例还提供了一种用户终端，所述用户终端包括：数据处理单元，适于当接收到基站发送的复用数据时，对所述复用数据进行处理，得到分别对应不同目标终端的待转发数据，所述目标终端为两个以上；数据发送单元，适于将所述待转发数据分别发送至对应的目标终端；应答消息接收单元，适于接收各所述目标终端发送的应答消息；应答消息复用单元，适于对所接收到的应答消息进行复用；应答消息发送单元，适于将复用后的应答消息发送至所述基站。
可选地，所述应答消息复用单元，适于按照各所述目标终端的身份标识号，对所接收到的应答消息进行排列，得到所述复用后的应答消息。
可选地，所述应答消息复用单元，适于按照各所述目标终端的身份标识号的升序或降序，对所接收到的应答消息进行排列。
可选地，所述应答消息复用单元，适于按照各所述待转发数据在所述复用数据中的排列顺序，对所述接收到的应答消息进行排列，得到所述复用后的应答消息。
可选地，所述应答消息复用单元，还适于当未接收到所述目标终端发送的应答消息时，将所述目标终端对应的应答消息在所述复用后的应答消息中的比特位置0。
可选地，所述用户终端还包括：下行控制信息接收单元，适于接收所述基站基于所述复用后的应答消息，发送的下行控制信息，所述下行控制信息用于指示待重传的数据；数据重传单元，适于基于所述下行控制信息，重新发送所述待重传的数据。
可选地，所述用户终端还包括：判断单元，适于在所述当接收到基站发送的复用数据时，对所述复用数据进行处理之前，当接收到基站发送的数据时，判断所接收到的数据是否为复用数据。
可选地，所述判断单元，适于基于基站发送的用于调度所述数据的物理层信令，判断所接收到的数据是否为复用数据。
本发明实施例还提供了一种计算机可读存储介质，其上存储有计算机指令，所述计算机指令运行时执行上述任一种所述方法的步骤。
本发明实施例还提供了一种用户终端，包括存储器和处理器，所述存储器上存储有能够在所述处理器上运行的计算机指令，所述处理器运行所述计算机指令时执行上述任一种所述方法的步骤。
与现有技术相比，本发明实施例的技术方案具有以下优点：
采用上述方案，在目标终端为两个以上时，通过接收各目标终端发送的应答消息，并对所接收到的应答消息进行复用后，再发送至基站，由此可以实现用户设备协作组中同时包含多个TUE及一个CUE的情况下，ACK/NACK消息的反馈。
附图说明
图1是本发明实施例中一种数据传输方法的流程图；
图2是本发明实施例中一种数据传输过程的信令交互的示意图；
图3是本发明实施例中一种用户终端的结构示意图。
具体实施方式
现有技术中，对于用户设备协作组中仅包含一个TUE及一个CUE的情况，TUE可以直接通过上行链路(uplink)向基站反馈ACK/NACK消息，也可以通过侧链路，先将ACK/NACK消息反馈给CUE，再由CUE通过上行链路反馈给基站。
然而，随着用户密度的不断增加和设备种类的多样化，出现了新的应用场景。在某些场景下，例如基站需要给多个可穿戴设备发送小数据包时，基站可以把这些小数据包复用后发送给CUE，再由CUE解码后分别转发给各个TUE，此时用户设备协作组中同时包含多个TUE及一个CUE，且CUE和TUE是一对多的关系。
对于用户设备协作组中同时包含多个TUE及一个CUE的情况，如何进行ACK/NACK消息反馈，目前尚未解决。
针对上述问题，本发明提供了一种数据传输方法，在目标终端为两个以上时，接收各目标终端发送的应答消息，并对所接收到的应答消息进行复用后，再发送至基站，实现用户设备协作组中同时包含多个TUE及一个CUE的情况下，ACK/NACK消息的反馈。
为使本发明的上述目的、特征和优点能够更为明显易懂，下面结合附图对本发明的具体实施例作详细地说明。
参照图1，本发明实施例提供了一种数据传输方法，所述方法可以包括以下步骤：
步骤11，当接收到基站发送的复用数据时，对所述复用数据进行处理，得到分别对应不同目标终端的待转发数据。
其中，所述目标终端为两个以上。
在本发明的实施例中，ACK/NACK消息，表示ACK消息或NACK消息。其中，当TUE成功接收到数据时，反馈ACK消息，否则反馈NACK消息。
在具体实施中，基站将要发给多个TUE的数据复用在一起，形成复用数据，并将该复用数据发送给同一CUE。此过程采用的是下行链路，复用数据由物理下行共享信道(Physical Downlink Shared Channel，PDSCH)承载。基站通过下行控制信息(Downlink Control Information，DCI)指示复用数据的资源分配以及侧链路上待转发数据的资源分配。
CUE对复用数据进行解码和解复用后，得到对应不同TUE的待转发数据。
在本发明的一实施例中，CUE在接收到基站发送的数据后，可以先判断接收到的数据是否为复用数据，在判断接收到的数据为复用数据后，才对所述复用数据进行处理。
在本发明的一实施例中，CUE可以基于基站发送用于调度所述数据的物理层信令，判断所接收到的数据是否为复用数据。
其中，所述物理层信令可以为DCI，当然也可以为其它物理层信令。比如，基站可以在DCI中增加一个域，用于指示目标终端的个数。CUE基于该DCI中新增加的域，可以判断所接收到的数据是否为复用数据。
步骤12，将所述待转发数据分别发送至对应的目标终端。
在具体实施中，CUE通过相应的侧链路将所述待转发数据发送至对应的目标终端，所述待转发数据由物理侧链共享信道(Physical Sidelink Shared Channel，PSSCH)承载。CUE还分别向各TUE发送侧链控制信息(Sidelink Control Information，SCI)。每个TUE与CUE之间的侧链路，都有相对应的SCI和待转发数据。SCI用来指示待转发数据的资源分配。
可以理解的是，由于是基站控制模式，所以SCI中的资源分配域也是来自DCI。比如，在DCI中增加域时，相应地SCI中也应增加相应的域。
步骤13，接收各所述目标终端发送的应答消息。
在具体实施中，TUE根据数据是否接收成功，反馈ACK消息或NACK消息给CUE。每个TUE均通过各自与CUE之间的侧链路，向该CUE反馈ACK/NACK消息。
比如，TUE可以通过物理侧链反馈信道(Physical Sidelink Feedback Channel，PSFCH)承载1bit ACK/NACK消息。其中，比特1可以表示TUE成功接收数据，比特0可以表示TUE没有成功接收数据。若TUE没反馈ACK/NACK消息，可能是因为TUE漏检了SCI。
步骤14，对所接收到的应答消息进行复用。
在本发明的一实施例中，可以按照各所述目标终端的身份标识号(TUE ID)，对所接收到的应答消息进行排列，得到所述复用后的应答消息。
具体地，可以按照各所述目标终端的身份标识号的升序，对所接收到的应答消息进行排列，也可以按照各所述目标终端的身份标识号的降序，对所接收到的应答消息进行排列。
在本发明的另一实施例中，也可以按照各所述待转发数据在所述复用数据中的排列顺序，对所述接收到的应答消息进行排列，得到所述复用后的应答消息。
在具体实施中，所述对所接收到的应答消息进行复用，还可以包括：
当未接收到所述目标终端发送的应答消息时，将所述目标终端对应的应答消息在所述复用后的应答消息中的比特位置0。
步骤15，将复用后的应答消息发送至所述基站。
CUE把来自各TUE的ACK/NACK消息进行复用，通过上行链路转发给基站。当有N个TUE，则复用后的应答消息有N比特。该复用后的应答消息由物理上行控制信道(Physical Uplink Control  Channel，PUCCH)承载。
在具体实施中，基站接收到CUE发送的复用后的应答消息后，重新进行数据的调度，但不需要重新发送数据，数据的重传由CUE进行。
具体地，CUE可以接收所述基站基于所述复用后的应答消息，发送的下行控制信息，所述下行控制信息用于指示待重传的数据。CUE基于所述下行控制信息，重新发送所述待重传的数据。
图2为本发明实施例中数据传输方法的一种信令交互示意图。
在图2中，用户设备协作组中有1个CUE和4个TUE，其中，4个TUE分别为TUE1，TUE2，TUE3及TUE4。整个数据传输过程如下：
步骤201，基站gNB向CUE发送DCI。
其中，所述DCI可以用于指示复用数据的资源分配以及侧链路上待转发数据的资源分配。CUE基于DCI还可以判断后续发送的数据是否为复用数据。
步骤202，基站gNB向CUE发送复用数据。
CUE对接收的复用数据进行解复用后，得到4份待转发数据，后续分别通过步骤203至步骤206，将需要转发至TUE1、TUE2、TUE3及TUE4的数据，通过相应的侧链路，转发至相应的TUE。CUE还向各TUE分别发送相应的SCI，来指示待转发数据的资源分配。
可以理解的是，步骤203至206可以同时执行，即CUE同时向TUE1～TUE4发送数据。步骤203至206也可以顺序执行，即CUE顺序向TUE1～TUE4发送数据。具体步骤203至206的执行顺序，并不构成对本发明的限制，且均在本发明的保护范围之内。
假设只有TUE4没有成功接收数据，而TUE1、TUE2及TUE3均成功接收数据，则TUE1、TUE2及TUE3分别在步骤207、步骤 208及步骤209反馈ACK消息给CUE，TUE4在步骤210反馈NACK消息给CUE。
可以理解的是，步骤207至步骤210的执行顺序，并不构成对本发明的限制，且均在本发明的保护范围之内。
CUE接收到TUE1～TUE4反馈的应答消息后，对其进行复用。
具体地，按照TUE身份标识号的升序，对所接收到的应答消息进行排列，则复用后的应答消息为：1，1，1，0。
按照TUE身份标识号的降序，对所接收到的应答消息进行排列，则复用后的应答消息为：0，1，1，1。
假设复用数据由part1、part2、part3、part4共4部分数据构成，分别对应的是TUE3、TUE4、TUE2、TUE1，由于只有TUE4对应的part2没有被成功接收，因此，按照各所述待转发数据在所述复用数据中的排列顺序，对所述接收到的应答消息进行排列，则复用后的应答消息为：1，0，1，1。
若没有接收到TUE2反馈的ACK消息，则将TUE2对应的应答消息在所述复用后的应答消息中的比特位置0。比如，在按照TUE身份标识号的升序排列所得到的复用后的应答消息应为：1，0，1，0。按照TUE身份标识号的降序排列，所得到的复用后的应答消息应为：0，1，0，1。按照各所述待转发数据在所述复用数据中的排列顺序进行排列，所得到的复用后的应答消息应为：1，0，0，1。
得到复用后的应答消息后，在步骤211，CUE将所述复用后的应答消息发送至基站gNB。后续基站gNB可以基于复用后的应答消息重新进行数据的调度。
具体地，基站gNB可以通过DCI先向CUE指示待重传的数据(即步骤212)，然后由CUE重传TUE4的数据，并通过相应的SCI指示重传数据的资源分配(即步骤213)。
由上述内容可知，本发明实施例中的数据传输方法，通过接收各目标终端发送的应答消息，并对所接收到的应答消息进行复用后，再发送至基站，实现数据包复用的场景下ACK/NACK消息的反馈。
为了使本领域技术人员更好地理解和实现本发明，以下对上述方法对应的装置及计算机可读存储介质进行详细描述。
参照图3，本发明实施例提供了一种用户终端30，所述用户终端30可以包括：数据处理单元31、数据发送单元32、应答消息接收单元33、应答消息复用单元34及应答消息发送单元35。其中：
所述数据处理单元31，适于当接收到基站发送的复用数据时，对所述复用数据进行处理，得到分别对应不同目标终端的待转发数据，所述目标终端为两个以上；
所述数据发送单元32，适于将所述待转发数据分别发送至对应的目标终端；
所述应答消息接收单元33，适于接收各所述目标终端发送的应答消息；
所述应答消息复用单元34，适于对所接收到的应答消息进行复用；
所述应答消息发送单元35，适于将复用后的应答消息发送至所述基站。
在本发明的一实施例中，所述应答消息复用单元34，适于按照各所述目标终端的身份标识号，对所接收到的应答消息进行排列，得到所述复用后的应答消息。
在本发明的一实施例中，所述应答消息复用单元34，适于按照各所述目标终端的身份标识号的升序或降序，对所接收到的应答消息进行排列。
在本发明的一实施例中，所述应答消息复用单元34，适于按照 各所述待转发数据在所述复用数据中的排列顺序，对所述接收到的应答消息进行排列，得到所述复用后的应答消息。
在本发明的一实施例中，所述应答消息复用单元34，还适于当未接收到所述目标终端发送的应答消息时，将所述目标终端对应的应答消息在所述复用后的应答消息中的比特位置0。
在本发明的一实施例中，所述用户终端30还可以包括：下行控制信息接收单元(未示出)及数据重传单元(未示出)。其中：
所述下行控制信息接收单元，适于接收所述基站基于所述复用后的应答消息，发送的下行控制信息，所述下行控制信息用于指示待重传的数据；
所述数据重传单元，适于基于所述下行控制信息，重新发送所述待重传的数据。
在本发明的另一实施例中，所述用户终端30还可以包括：判断单元(未示出)。其中：所述判断单元，适于在所述当接收到基站发送的复用数据时，对所述复用数据进行处理之前，当接收到基站发送的数据时，判断所接收到的数据是否为复用数据。
在本发明的一实施例中，所述判断单元，适于基于基站发送的用于调度所述数据的物理层信令，判断所接收到的数据是否为复用数据。
本发明实施例还提供了另一种计算机可读存储介质，其上存储有计算机指令，所述计算机指令运行时执行上述实施例中任一种所述数据传输方法的步骤，不再赘述。
在具体实施中，所述计算机可读存储介质可以包括：ROM、RAM、磁盘或光盘等。
本发明实施例还提供了一种用户终端，所述用户终端可以包括存储器和处理器，所述存储器上存储有能够在所述处理器上运行的计算 机指令，所述处理器运行所述计算机指令时执行上述实施例中任一种所述数据传输方法的步骤，不再赘述。
虽然本发明披露如上，但本发明并非限定于此。任何本领域技术人员，在不脱离本发明的精神和范围内，均可作各种更动与修改，因此本发明的保护范围应当以权利要求所限定的范围为准。

Claims (18)

  1. 一种数据传输方法，其特征在于，包括：
    当接收到基站发送的复用数据时，对所述复用数据进行处理，得到分别对应不同目标终端的待转发数据，所述目标终端为两个以上；
    将所述待转发数据分别发送至对应的目标终端；
    接收各所述目标终端发送的应答消息；
    对所接收到的应答消息进行复用；
    将复用后的应答消息发送至所述基站。
  2. 如权利要求1所述的数据传输方法，其特征在于，所述对所接收到的应答消息进行复用，包括：
    按照各所述目标终端的身份标识号，对所接收到的应答消息进行排列，得到所述复用后的应答消息。
  3. 如权利要求2所述的数据传输方法，其特征在于，所述按照各所述目标终端的身份标识号，对所接收到的应答消息进行排列，包括：
    按照各所述目标终端的身份标识号的升序或降序，对所接收到的应答消息进行排列。
  4. 如权利要求1所述的数据传输方法，其特征在于，所述对所接收到的应答消息进行复用，包括：
    按照各所述待转发数据在所述复用数据中的排列顺序，对所述接收到的应答消息进行排列，得到所述复用后的应答消息。
  5. 如权利要求2或4所述的数据传输方法，其特征在于，所述对所接收到的应答消息进行复用，还包括：
    当未接收到所述目标终端发送的应答消息时，将所述目标终端对应的应答消息在所述复用后的应答消息中的比特位置0。
  6. 如权利要求1所述的数据传输方法，其特征在于，还包括：
    接收所述基站基于所述复用后的应答消息，发送的下行控制信息，所述下行控制信息用于指示待重传的数据；
    基于所述下行控制信息，重新发送所述待重传的数据。
  7. 如权利要求1所述的数据传输方法，其特征在于，在所述当接收到基站发送的复用数据时，对所述复用数据进行处理之前，还包括：
    当接收到基站发送的数据时，判断所接收到的数据是否为复用数据。
  8. 如权利要求7所述的数据传输方法，其特征在于，所述判断所接收到的数据是否为复用数据，包括：
    基于基站发送的用于调度所述数据的物理层信令，判断所接收到的数据是否为复用数据。
  9. 一种用户终端，其特征在于，包括：
    数据处理单元，适于当接收到基站发送的复用数据时，对所述复用数据进行处理，得到分别对应不同目标终端的待转发数据，所述目标终端为两个以上；
    数据发送单元，适于将所述待转发数据分别发送至对应的目标终端；
    应答消息接收单元，适于接收各所述目标终端发送的应答消息；
    应答消息复用单元，适于对所接收到的应答消息进行复用；
    应答消息发送单元，适于将复用后的应答消息发送至所述基站。
  10. 如权利要求9所述的用户终端，其特征在于，所述应答消息复用单元，适于按照各所述目标终端的身份标识号，对所接收到的应答消息进行排列，得到所述复用后的应答消息。
  11. 如权利要求10所述的用户终端，其特征在于，所述应答消息复 用单元，适于按照各所述目标终端的身份标识号的升序或降序，对所接收到的应答消息进行排列。
  12. 如权利要求9所述的用户终端，其特征在于，所述应答消息复用单元，适于按照各所述待转发数据在所述复用数据中的排列顺序，对所述接收到的应答消息进行排列，得到所述复用后的应答消息。
  13. 如权利要求10或12所述的用户终端，其特征在于，所述应答消息复用单元，还适于当未接收到所述目标终端发送的应答消息时，将所述目标终端对应的应答消息在所述复用后的应答消息中的比特位置0。
  14. 如权利要求9所述的用户终端，其特征在于，还包括：
    下行控制信息接收单元，适于接收所述基站基于所述复用后的应答消息，发送的下行控制信息，所述下行控制信息用于指示待重传的数据；
    数据重传单元，适于基于所述下行控制信息，重新发送所述待重传的数据。
  15. 如权利要求9所述的用户终端，其特征在于，还包括：
    判断单元，适于在所述当接收到基站发送的复用数据时，对所述复用数据进行处理之前，当接收到基站发送的数据时，判断所接收到的数据是否为复用数据。
  16. 如权利要求15所述的用户终端，其特征在于，所述判断单元，适于基于基站发送的用于调度所述数据的物理层信令，判断所接收到的数据是否为复用数据。
  17. 一种计算机可读存储介质，其上存储有计算机指令，其特征在于，所述计算机指令运行时执行权利要求1至8任一项所述方法的步骤。
  18. 一种用户终端，包括存储器和处理器，所述存储器上存储有能够在所述处理器上运行的计算机指令，其特征在于，所述处理器运行所 述计算机指令时执行权利要求1至8任一项所述方法的步骤。
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