WO2023005919A1 - 分组数据汇聚协议状态报告发送方法、设备及装置 - Google Patents

分组数据汇聚协议状态报告发送方法、设备及装置 Download PDF

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Publication number
WO2023005919A1
WO2023005919A1 PCT/CN2022/107900 CN2022107900W WO2023005919A1 WO 2023005919 A1 WO2023005919 A1 WO 2023005919A1 CN 2022107900 W CN2022107900 W CN 2022107900W WO 2023005919 A1 WO2023005919 A1 WO 2023005919A1
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WO
WIPO (PCT)
Prior art keywords
base station
sending
receiving end
data unit
status report
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PCT/CN2022/107900
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English (en)
French (fr)
Inventor
张惠英
赵亚利
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大唐移动通信设备有限公司
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Publication of WO2023005919A1 publication Critical patent/WO2023005919A1/zh

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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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/04—Error control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment
    • 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 disclosure relates to the technical field of wireless communication, and in particular to a method, device and device for sending a packet data convergence protocol status report.
  • the traditional wireless communication adopts the cellular network communication method, that is, the terminal and the network side equipment transmit uplink and downlink data/control information through the interface between the user terminal and the terrestrial wireless access network (Interface between UE and UTRAN, Uu).
  • UE-to-Network Relay can be a terminal with a relay function.
  • the interface between the relay terminal (Relay UE) and the network uses the Uu interface, and the relay terminal (which can be called Remote terminals) use a direct communication interface, and the link between the Relay and the network may be called a backhaul link (BH) for the remote terminal.
  • the high level of the existing mechanism triggers the packet data convergence protocol (Packet Data Convergence Protocol, PDCP) status report is based on the PDCP reconstruction or PDCP data recovery caused by UE handover or path switching.
  • PDCP Packet Data Convergence Protocol
  • the remote terminal passes the PC5 (Proximity Communication Port 5, proximity communication port 5) interface
  • the data and signaling sent to the Relay UE cannot be transmitted to the base station, resulting in data packet loss; or when the wireless link failure occurs on the PC5 interface between the Relay UE and the Remote UE, the PC5 interface link cannot transmit data, and the base station passes the Uu interface
  • the data and signaling sent to the Relay UE cannot be transmitted to the Remote UE, resulting in packet loss. Therefore, how to realize the lossless transmission of data packets in the relay scenario has become an urgent problem to be solved.
  • the embodiments of the present disclosure provide a packet data convergence protocol status report sending method, device and device, which are used to solve the defect of data packet loss in relay scenarios in related technologies, and realize lossless data transmission .
  • an embodiment of the present disclosure provides a method for sending a packet data convergence protocol status report, including:
  • the PDCP status report is used to indicate the first data unit successfully transmitted and/or the second data unit failed to transmit in the target data unit;
  • the first communication link is a link formed by the first sending end of the target data unit, the first relay terminal, and the first receiving end of the target data unit;
  • the first receiving end is the same or different from the second receiving end
  • the first sending end is the same or different from the second sending end.
  • both the first sending end and the second sending end are first remote terminals.
  • both the first sending end and the second sending end are second remote terminals ;
  • the third base station is the target base station to which the first relay terminal is connected after handover or reestablishment from the second base station; the PDCP status report is based on the second base station by the third base station
  • the sent first transfer data is determined, wherein the first transfer data is used to indicate the first data unit whose transmission is successful and/or the second data unit whose transmission fails in the target data unit.
  • both the first receiving end and the second receiving end are third remote terminals
  • both the first sending end and the second sending end are fourth base stations
  • the The second communication link includes any of the following:
  • the first sending end is a fifth base station
  • the second sending end is a sixth base station
  • the sixth base station is the target base station directly connected to after the fourth remote terminal is handed over, or the sixth base station is the third relay terminal after the fourth remote terminal is handed over or reestablished
  • the target base station connected to; the sixth base station stores the second transfer data sent by the fifth base station, where the second transfer data includes the target data unit.
  • both the first receiving end and the second receiving end are fifth remote terminals
  • both the first sending end and the second sending end are sixth remote terminals
  • the second communication link includes a link connecting the fifth remote terminal to the sixth remote terminal through the first relay terminal.
  • the second receiving end of the target data unit determines that the connection with the second communication link between the second sending end of the target data unit is successful, then send a message to the second sending end of the target data unit Send packet data convergence protocol PDCP status report, including:
  • the second receiving end of the target data unit determines that the connection with the second communication link between the second sending end of the target data unit is successful, then send a message to the second sending end of the target data unit Send packet data convergence protocol PDCP status report, including:
  • the second communication link is successfully connected and includes a fourth relay terminal, receive a second trigger message sent by the fourth relay terminal; based on the second trigger message, send to the second The end sends the PDCP status report.
  • an embodiment of the present disclosure further provides a communication device, including a memory, a transceiver, and a processor, wherein: the memory is used to store computer programs; the transceiver is used to send and receive data under the control of the processor; A processor, configured to read the computer program in the memory and implement the steps in the method for sending a packet data convergence protocol status report according to the first aspect.
  • an embodiment of the present disclosure further provides a device for sending a packet data convergence protocol status report, including:
  • a sending module configured to, after a partial connection failure between the first receiving end and the first relay terminal in the first communication link, if the second receiving end of the target data unit determines to communicate with the second sending end of the target data unit If the second communication link between them is successfully connected, then send a Packet Data Convergence Protocol PDCP status report to the second sender of the target data unit;
  • the PDCP status report is used to indicate the first data unit successfully transmitted and/or the second data unit failed to transmit in the target data unit;
  • the first communication link is a link formed by the first sending end of the target data unit, the first relay terminal, and the first receiving end of the target data unit;
  • the first receiving end is the same or different from the second receiving end
  • the first sending end is the same or different from the second sending end.
  • an embodiment of the present disclosure further provides a processor-readable storage medium, the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the above-mentioned first aspect.
  • the second receiving end can send a PDCP status report to the second sending end to ensure that The second sending end accurately obtains the data that has not been successfully transmitted, and then the second sending end can perform a retransmission operation on the second data unit that fails to be transmitted based on the PDCP status report, so as to realize lossless data transmission.
  • FIG. 1 is a schematic diagram of a traditional wireless communication method provided by related technologies
  • FIG. 2 is a schematic diagram of a device-to-device direct communication method provided by related technologies
  • Figure 3 is a schematic diagram of UE-to-Network Relay provided by related technologies
  • Figure 4 is a schematic diagram of the L2 UE-to-Network Relay user plane protocol stack provided by related technologies
  • Figure 5 is a schematic diagram of the L2 UE-to-UE Relay user plane protocol stack provided by related technologies
  • Figure 6 is a schematic diagram of the PDCP status report format provided by related technologies
  • FIG. 7 is one of the schematic flowcharts of a method for sending a packet data convergence protocol status report provided by an embodiment of the present disclosure
  • FIG. 8 is the second schematic flow diagram of a method for sending a packet data convergence protocol status report provided by an embodiment of the present disclosure
  • FIG. 9 is a third schematic flow diagram of a method for sending a packet data convergence protocol status report provided by an embodiment of the present disclosure.
  • FIG. 10 is a fourth schematic flowchart of a method for sending a packet data convergence protocol status report provided by an embodiment of the present disclosure
  • FIG. 11 is one of the schematic structural diagrams of a communication device provided by an embodiment of the present disclosure.
  • FIG. 12 is a second structural schematic diagram of a communication device provided by an embodiment of the present disclosure.
  • Fig. 13 is a schematic structural diagram of an apparatus for sending a packet data convergence protocol status report provided by an embodiment of the present disclosure.
  • Fig. 1 is a schematic diagram of a traditional wireless communication method provided by related technologies.
  • the traditional wireless communication adopts a cellular network communication method, that is, a terminal and a network side device perform uplink and downlink data/control information transmission through a Uu interface.
  • FIG 2 is a schematic diagram of a device-to-device direct communication method provided by related technologies.
  • direct communication means that adjacent terminals can perform data transmission through a direct communication link (also called Sidelink or PC5) within a short distance.
  • the wireless interface corresponding to the Sidelink link is called a direct communication interface (also called a Sidelink interface or a PC5 interface).
  • FIG. 3 is a schematic diagram of UE-to-Network Relay provided by related technologies. As shown in Figure 3, in order to expand network coverage, UE-to-Network Relay can be introduced.
  • UE-to-Network Relay The node as a relay (Relay) itself can be a terminal with a relay function.
  • the interface between the relay and the network uses the Uu interface, and the interface between the relayed UE (remote UE) uses a direct communication interface (also called Sidelink interface or PC5 interface).
  • the link between the relay and the network may be called a backhaul link (Backhaul link) for the remote UE.
  • Backhaul link Backhaul link
  • Figure 4 is a schematic diagram of the L2 UE-to-Network Relay user plane protocol stack provided by the related technology
  • Figure 5 is a schematic diagram of the L2 UE-to-UE Relay user plane protocol stack provided by the related technology, as shown in Figure 4 and Figure 5, regardless of Whether it is L2 terminal-to-network (UE-to-Network, U2N) relay or L2 terminal-to-terminal (UE-to-UE, U2U) relay, PDCP and above layers are end-to-end protocol stack, adaptation layer and wireless link Control (RLC Radio Link Control, RLC) and the following layers are hop-by-hop protocol stacks.
  • UE-to-Network U2N
  • UE-to-UE, U2U L2 terminal-to-terminal
  • PDCP and above layers are end-to-end protocol stack
  • adaptation layer and wireless link Control RLC Radio Link Control, RLC
  • RLC Radio Link Control
  • FIG. 6 is a schematic diagram of the PDCP status report format provided by related technologies.
  • the PDCP status report is used by the receiving end to report the data reception status to the sending end.
  • D/C is 0 to indicate a control protocol data unit (Protocol Data Unit, PDU)
  • the PDU type is set to 000, which means that the PDCP control PDU is a PDCP status report.
  • FMC Frist Missing COUNT, the COUNT value of the first missing packet data convergence protocol service data unit
  • Bitmap Bitmap (Bitmap) is used to indicate whether each PDCP SDU is received correctly after FMC.
  • the COUNT value is smaller than the PDCP SDU of FMC and the corresponding COUNT value position in the Bitmap PDCP SDUs with a value of 1 are discarded.
  • the existing PDCP status report trigger conditions are as follows:
  • AM Acknowledged Mode
  • DRB Data Radio Bearer
  • trigger conditions include, the high layer requests PDCP entity reconstruction, the high layer requests PDCP data recovery, and the high layer requests uplink data transfer And daps-SourceRelease is configured and the high-level reconfigures the PDCP entity to release the dual active protocol stack (DualActive Protocol Stack, DAPS);
  • the trigger conditions for the unacknowledged mode (Unacknowledged Mode, UM) DRB include high-level requests for uplink data transfer; for sidelink AM DRB
  • the triggering conditions include the higher layer requesting PDCP entity re-establishment.
  • FIG. 7 is one of the flow diagrams of the method for sending a packet data convergence protocol status report provided by an embodiment of the present disclosure. As shown in FIG. 7, the method includes the following steps:
  • Step 700 after part of the connection between the first receiving end and the first relay terminal in the first communication link fails, if the second receiving end of the target data unit determines to communicate with the second sending end of the target data unit If the second communication link is connected successfully, then send a PDCP status report to the second sending end of the target data unit;
  • the PDCP status report is used to indicate the first data unit successfully transmitted and/or the second data unit failed to transmit in the target data unit;
  • the first communication link is a link formed by the first sending end of the target data unit, the first relay terminal, and the first receiving end of the target data unit;
  • the first receiving end is the same or different from the second receiving end
  • the first sending end is the same or different from the second sending end.
  • the target data unit may be a data unit that needs to be sent from the sending end to the receiving end.
  • the receiving end may be a remote terminal or a base station, and correspondingly, the sending end may be a base station or a remote terminal.
  • the executor of the method for sending the packet data convergence protocol status report may be the second receiving end of the target data unit.
  • the communication link between the first sending end and the first receiving end may include a first relay terminal, and the communication link between the first sending end and the first receiving end may be the first communication link.
  • the first sending end is a remote terminal device and the first receiving end is a base station device
  • part of the connection between the first receiving end and the first relay terminal in the first communication link fails
  • the situation may be: the Uu interface wireless link between the first relay terminal and the first receiving end fails.
  • the first sending end is a base station device and the first receiving end is a remote terminal device
  • the first receiving end is a remote terminal device
  • the situation may be: the wireless link of the PC5 interface between the first relay terminal and the first receiving end fails.
  • the partial connection between the first receiving end and the first relay terminal in the first communication link may be: the wireless link of the PC5 interface between the first relay terminal and the first receiving end fails.
  • the sending end may be the second sending end
  • the receiving end may be the second receiving end
  • the first receiving end is the same or different from the second receiving end
  • the first sending end is the same or different from the second sending end.
  • the second data unit may always be stored in the first sender of the target data unit, that is, it will not be deleted by the first sender.
  • the first sending end is a remote terminal device and the first receiving end is a base station device
  • the first sending end may be a remote terminal Remote UE1
  • the first receiving end may be a base station BS1 (Base Station 1)
  • the first relay terminal may be the relay terminal Relay UE1.
  • RRC reconstruction is performed on the link
  • the remote terminal Remote UE1 can pass through the relay terminal Relay UE1 re-establishes a second communication link connection with base station BS1.
  • both the first receiving end and the second receiving end are base station BS1, and at the same time, both the first sending end and the second sending end are remote terminals Remote UE1.
  • the first sending end is a remote terminal device and the first receiving end is a base station device
  • the first sending end may be a remote terminal Remote UE2
  • the first receiving end may be a base station BS2
  • the first relay terminal It can be the relay terminal Relay UE1.
  • the link is rebuilt by RRC, and the remote terminal Remote UE2 can communicate with a target base station through the relay terminal Relay UE1.
  • BS3 establishes a second communication link connection.
  • the second sending end is the remote terminal Remote UE2, and the second receiving end is the target base station BS3.
  • the first sending end is a base station device and the first receiving end is a remote terminal device
  • the first sending end may be a base station BS4
  • the first receiving end may be a remote terminal Remote UE3
  • the first relay terminal It can be the relay terminal Relay UE1.
  • the link is rebuilt by RRC, and the remote terminal Remote UE3 can re-establish the second link with the base station BS4.
  • connection of the communication link in this case, the second communication link can be the link connecting the remote terminal Remote UE3 through the relay terminal Relay UE1 and the base station BS4, and the second communication link can be the remote terminal Remote UE3 Through another link connecting the relay terminal Relay UE2 and the base station BS4, the second communication link may also be a link directly connecting the remote terminal Remote UE3 and the base station BS4.
  • the first sending end is a base station device and the first receiving end is a remote terminal device
  • the first sending end may be a base station BS5
  • the first receiving end may be a remote terminal Remote UE4
  • the first relay terminal It can be the relay terminal Relay UE1.
  • RRC re-establishes the link
  • the remote terminal Remote UE4 can establish a second link with the target base station BS6.
  • connection of the communication link in this case, the second communication link can be the link that the remote terminal Remote UE4 is directly connected with the target base station BS6, and the second communication link can also be that the remote terminal Remote UE4 passes through another The link connecting the relay terminal Relay UE3 and the target base station BS6.
  • the first sending end is a remote terminal device and the first receiving end is a remote terminal device
  • the first sending end may be a remote terminal Remote UE6
  • the first receiving end may be a remote terminal Remote UE5
  • the first relay terminal may be the relay terminal Relay UE1.
  • the link is rebuilt by RRC, and the remote terminal Remote UE6 can pass through the After the terminal Relay UE1 and the remote terminal Remote UE5 re-establish the connection of the second communication link, in this case, the first receiving end and the second receiving end are both Remote UE5, and at the same time, the first sending end and the second sending end Both are remote UE6 terminals.
  • the PDCP status report may be sent to the second sending end.
  • the second sending end may learn, based on the PDCP status report, the first data unit that has been successfully transmitted and/or the second data unit that has failed to be transmitted in the target data unit.
  • the second sending end may perform a retransmission operation on the second data unit, so that the second receiving end receives the second data unit.
  • the first sending end may continuously save the target data, so that the second data unit Not deleted by the first sender.
  • the first relay terminal sends a link failure message to the first sending end, and the first sending end based on The message may start a mechanism of "deleting data packets not based on the RLC data transmission success indication", thereby ensuring that the second data unit is not deleted by the first sending end.
  • the second sending end can change the mechanism of "do not delete data packet based on RLC data transmission successful indication" to "delete data packet based on RLC data transmission successful indication”. Delete operation" mechanism.
  • the second receiving end may send the PDCP status report to the second receiving end based on a default mechanism.
  • the second sending end may send a trigger message to the second receiving end, and the second receiving end may send a PDCP status report to the second receiving end based on the trigger message. end.
  • the relay terminal in the second communication link may send a trigger message to the second receiving end, and the second receiving end may message, sending the PDCP status report to the second receiving end.
  • the second receiving end can send a PDCP status report to the second sending end, so as to ensure that the second sending end can accurately know the unsuccessful transmission The data, and then the second sending end can perform a retransmission operation on the second data unit that fails to be transmitted based on the PDCP status report, so as to realize lossless data transmission.
  • both the first sending end and the second sending end are first remote terminals.
  • first receiving end and the second receiving end are the first base station.
  • first receiving end is a base station device
  • first receiving end and the second receiving end are the same base station
  • the device, that is, the first receiving end is the first base station and the second receiving end is also the first base station.
  • first sending end and the second sending end are the first remote terminal. It can be understood that, in the case where the first receiving end and the second receiving end are both the first base station, the first sending end and the second sending end It may be the same remote terminal device, that is, the first sending end is the first remote terminal and the second sending end is also the first remote terminal.
  • the first sending end when the first sending end is a remote terminal device and the first receiving end is a base station device, the first sending end may be a remote terminal Remote UE1, and the first receiving end may be a base station BS1,
  • the first relay terminal may be the relay terminal Relay UE1.
  • RRC reconstruction is performed on the link, and the remote terminal Remote UE1 can pass through the relay terminal Relay UE1 re-establishes a second communication link connection with base station BS1.
  • both the first receiving end and the second receiving end are base station BS1, and at the same time, both the first sending end and the second sending end are remote terminals Remote UE1.
  • both the first sending end and the second sending end are second remote terminals ;
  • the third base station is the target base station to which the first relay terminal is connected after handover or reestablishment from the second base station; the PDCP status report is based on the second base station by the third base station
  • the sent first transfer data is determined, wherein the first transfer data is used to indicate the first data unit whose transmission is successful and/or the second data unit whose transmission fails in the target data unit.
  • the first receiving end being the second base station and the second receiving end being the third base station
  • the first receiving end may be the second base station
  • the first relay terminal may switch from the second base station to connect to the target base station, and the target base station may be the third base station, that is, the second receiving end may be the third base station.
  • first sending end and the second sending end being the second remote terminal
  • the first sending end and the second sending end may be the same
  • the remote terminal device that is, the first sending end is the second remote terminal and the second sending end is also the second remote terminal.
  • the first receiving end may send the first transfer data to the third base station, and the first transfer data may be understood as the first transfer data used to indicate the successful transfer in the target data unit.
  • a data unit and/or a second data unit whose transmission fails, and then the third base station may generate a PDCP status report to be sent to the second sending end based on the first transfer data.
  • the first sending end when the first sending end is a remote terminal device and the first receiving end is a base station device, the first sending end may be a remote terminal Remote UE2, and the first receiving end may be a base station BS2,
  • the first relay terminal may be the relay terminal Relay UE1.
  • RRC reconstruction is performed on the link, and the remote terminal Remote UE2 can pass through the relay terminal Relay UE1 establishes a second communication link connection with a target base station BS3.
  • the second sending end is the remote terminal Remote UE2, and the second receiving end is the target base station BS3.
  • both the first receiving end and the second receiving end are third remote terminals
  • both the first sending end and the second sending end are fourth base stations
  • the The second communication link includes any of the following:
  • first receiving end and the second receiving end are third remote terminals
  • first receiving end and the second receiving end may be the same remote terminal device, that is, the first receiving end is the third remote terminal and the second receiving terminal is also the third remote terminal.
  • first sending end and the second sending end are the fourth base station
  • first sending end and the second sending end can be the same base station equipment, that is, the first sending end is the fourth base station and the second sending end It is also the fourth base station.
  • the second communication link may be a link connecting the third remote terminal to the fourth base station through the first relay terminal; the second communication link may be the third remote terminal through the second relay terminal (different from the first relay terminal) a link connected to the fourth base station; the second communication link may also be a link directly connected to the third remote terminal and the fourth base station.
  • the first sending end when the first sending end is a base station device and the first receiving end is a remote terminal device, the first sending end may be a base station BS4, and the first receiving end may be a remote terminal Remote UE3,
  • the first relay terminal can be the relay terminal Relay UE1. After the wireless link of the PC5 interface between the relay terminal Relay UE1 and the remote terminal UE3 fails, the link is rebuilt by RRC, and the remote terminal Remote UE3 can communicate with the base station BS4 re-establishes the connection of the second communication link.
  • the second communication link may be a link connecting the remote terminal Remote UE3 to the base station BS4 through the relay terminal Relay UE1, and the second communication link may be
  • the remote terminal Remote UE3 is a link connecting the base station BS4 through another relay terminal Relay UE2, and the second communication link may also be a link directly connecting the remote terminal Remote UE3 and the base station BS4.
  • the first sending end is a fifth base station
  • the second sending end is a sixth base station
  • the sixth base station is the target base station directly connected to after the fourth remote terminal is handed over, or the sixth base station is the third relay terminal after the fourth remote terminal is handed over or reestablished
  • the target base station connected to; the sixth base station stores the second transfer data sent by the fifth base station, where the second transfer data includes the target data unit.
  • first receiving end and the second receiving end may be the same remote terminal device, that is, the first receiving end is the fourth remote terminal device.
  • first receiving end is the fourth remote terminal device.
  • Four remote terminals and the second receiving terminal is also the fourth remote terminal.
  • the first sending end may be the fifth base station
  • the fourth remote terminal may perform The handover is connected to the target base station
  • the target base station may be the sixth base station, that is, the second sending end is the sixth base station.
  • the sixth base station may be a target base station directly connected to after the fourth remote terminal performs a handover; the sixth base station may also be a third relay terminal (different from the first relay terminal) The target base station to which the relay terminal) is connected.
  • the fifth base station may send second transfer data to the sixth base station, and the second transfer data may include the target data unit, so that the sixth base station may send
  • the PDCP status report learns that the second data unit failed to be transmitted in the target data unit, a retransmission operation is performed on the second data unit.
  • the first sending end when the first sending end is a base station device and the first receiving end is a remote terminal device, the first sending end may be a base station BS5, and the first receiving end may be a remote terminal Remote UE4,
  • the first relay terminal can be the relay terminal Relay UE1.
  • RRC reconstruction is performed on the link, and the remote terminal Remote UE4 can communicate with the target
  • the base station BS6 establishes the connection of the second communication link.
  • the second communication link can be a link directly connected between the remote terminal Remote UE4 and the target base station BS6, and the second communication link can also be a remote terminal The link between Remote UE4 and target base station BS6 through another relay terminal Relay UE3.
  • both the first receiving end and the second receiving end are fifth remote terminals
  • both the first sending end and the second sending end are sixth remote terminals
  • the second communication link includes a link connecting the fifth remote terminal to the sixth remote terminal through the first relay terminal.
  • first receiving end and the second receiving end are the fifth remote terminal.
  • first receiving end and the second receiving end are the same remote terminal device, that is, the first receiving end is the fifth remote terminal and the second receiving end is also the fifth remote terminal.
  • first sending end and the second sending end being the sixth remote terminal
  • first receiving end and the second receiving end are both the fifth remote terminal
  • first sending end and the second receiving end may be the same remote terminal device, that is, the first sending end is the sixth remote terminal and the second sending end is also the sixth remote terminal.
  • the first sending end when the first sending end is a remote terminal device and the first receiving end is a remote terminal device, the first sending end may be a remote terminal Remote UE6, and the first receiving end may be a remote UE6.
  • the end terminal Remote UE5, the first relay terminal may be the relay terminal Relay UE1, after the PC5 interface wireless link between the relay terminal Relay UE1 and the remote terminal Remote UE5 fails, RRC re-establishes the link, and the remote terminal Remote UE6 can re-establish the connection of the second communication link with the remote terminal Remote UE5 through the relay terminal Relay UE1.
  • both the first receiving end and the second receiving end are Remote UE5. and the second sending end are remote terminals Remote UE6.
  • the method includes: when the second communication link is successfully connected, receiving a first trigger message sent by the second sending end; based on the first trigger message, sending a message to the second sending end sending the PDCP status report.
  • the second sending end may send a trigger message (that is, the first trigger message) to the second receiving end, and the second receiving end may, based on the trigger message, send the PDCP A status report is sent to the second receiver.
  • a trigger message that is, the first trigger message
  • the method includes: when the second communication link is successfully connected and includes a fourth relay terminal, receiving a second trigger message sent by the fourth relay terminal; based on the second A message is triggered to send the PDCP status report to the second sending end.
  • the relay terminal in the second communication link may send a trigger message (that is, a second trigger message) to the second receiving end, and the second The second receiving end may send the PDCP status report to the second receiving end based on the trigger message.
  • a trigger message that is, a second trigger message
  • FIG. 8 is the second schematic flow diagram of the method for sending a packet data convergence protocol status report provided by an embodiment of the present disclosure.
  • the first remote terminal accesses the first base station through the first L2 relay terminal , the wireless link of the Uu interface of the first relay terminal fails, and then the first base station succeeds in reestablishing it.
  • the specific description of each step is as follows:
  • the first remote terminal resides in cell 1 controlled by the first base station through the first relay terminal.
  • Step 801 data transmission
  • the first remote terminal performs data transmission with the first base station through the first relay terminal.
  • Step 802 Uu interface wireless link failure
  • a Uu interface wireless link failure occurs in the first relay terminal.
  • the first relay terminal triggers the Uu interface RRC re-establishment process, and the re-establishment succeeds at the first base station.
  • Step 804 triggering a message
  • the first relay terminal sends a trigger message to the first base station, so as to trigger the first base station to send a PDCP status report.
  • the first remote terminal may send a trigger message to the first base station, so as to trigger the first base station to send a PDCP status report.
  • the first base station may send the PDCP status report based on a default mechanism (no need to trigger a message).
  • Step 805 PDCP status report
  • the first base station sends a PDCP status report of uplink data to the first remote terminal.
  • the first remote terminal may process the PDCP SDU based on the received PDCP status report, and retransmit the PDCP SDU not correctly received by the opposite end according to the FMC and bitmap instructions.
  • FIG. 9 is the third schematic flow diagram of the packet data convergence protocol status report sending method provided by the embodiment of the present disclosure.
  • the second remote terminal accesses the second base station through the first L2 relay terminal , the wireless link of the Uu interface of the first relay terminal fails, and then the third base station succeeds in reestablishing it.
  • the specific description of each step is as follows:
  • the second remote terminal resides in cell 1 controlled by the second base station through the first relay terminal.
  • Step 901 data transmission
  • the second remote terminal performs data transmission with the second base station through the first relay terminal.
  • Step 902 Uu interface wireless link failure
  • a Uu interface wireless link failure occurs in the first relay terminal.
  • Step 903 RRC reconstruction
  • the first relay terminal triggers the Uu interface RRC reestablishment process, and the reestablishment succeeds in the third base station.
  • Step 904 data transfer
  • the second base station and the third base station exchange and relay the context of UE1 and the second remote terminal connected thereto, and transfer the data.
  • the second base station sends the first transfer data to the third base station, which is used to indicate the first data unit that is successfully transmitted and/or the second data unit that fails to be transmitted in the target data unit, and then the third base station may based on The first transferred data generates a PDCP status report sent to the second remote terminal.
  • Step 905 triggering a message
  • the first relay terminal sends a trigger message to the third base station, which is used to trigger the third base station to send a PDCP status report.
  • the second remote terminal may send a trigger message to the third base station, so as to trigger the third base station to send the PDCP status report.
  • the third base station may send a PDCP status report based on a default mechanism (no need to trigger a message).
  • Step 906 PDCP status report
  • the third base station sends a PDCP status report of uplink data to the second remote terminal
  • Step 907 data transmission.
  • the third base station can process the PDCP SDU based on the received PDCP status report, and retransmit the PDCP SDU not correctly received by the opposite end according to the FMC and bitmap instructions.
  • FIG. 10 is the fourth schematic flow diagram of the method for sending a packet data convergence protocol status report provided by an embodiment of the present disclosure.
  • the sixth remote terminal accesses the fifth remote terminal through the L2 first relay terminal. end terminal, the wireless link between the PC5 interface between the first relay terminal and the fifth remote terminal fails, and then the RRC is reestablished successfully.
  • the specific description of each step is as follows:
  • the initial sixth remote terminal communicates with the fifth remote terminal through the first relay terminal.
  • Step 1001 data transmission
  • the sixth remote terminal performs data transmission with the fifth remote terminal through the first relay terminal.
  • Step 1002 the wireless link between the PC5 interface between the first relay terminal and the fifth remote terminal fails
  • Step 1003 RRC reconstruction
  • the first relay terminal triggers an RRC reestablishment process on the PC5 interface, and successfully reestablishes with the fifth remote terminal.
  • Step 1004 triggering a message
  • the first relay terminal sends a trigger message to the fifth remote terminal, which is used to trigger the fifth remote terminal to send a PDCP status report.
  • the sixth remote terminal may send a trigger message to the fifth remote terminal, so as to trigger the base station 1 to send the PDCP status report.
  • the fifth remote terminal may send a PDCP status report based on a default mechanism (no need to trigger a message).
  • Step 1005 PDCP status report
  • the fifth remote terminal sends a PDCP status report of uplink data to the sixth remote terminal.
  • Step 1006 data transmission.
  • the sixth remote terminal may process the PDCP SDU based on the received PDCP status report, and retransmit the PDCP SDU not correctly received by the opposite end according to the FMC and bitmap instructions.
  • the second receiving end can send a PDCP status report to the second sending end, so as to ensure that the second sending end can accurately know the unsuccessful transmission The data, and then the second sending end can perform a retransmission operation on the second data unit that fails to be transmitted based on the PDCP status report, so as to realize lossless data transmission.
  • the applicable system may be a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (WCDMA) general packet Wireless business (general packet radio service, GPRS) system, long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD) system, Long term evolution advanced (LTE-A) system, universal mobile telecommunications system (UMTS), worldwide interoperability for microwave access (WiMAX) system, 5G new air interface (New Radio, NR) system, etc.
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • WCDMA wideband code division multiple access
  • GPRS general packet Wireless business
  • long term evolution long term evolution
  • LTE long term evolution
  • LTE frequency division duplex frequency division duplex
  • FDD frequency division duplex
  • TDD time division duplex
  • LTE-A Long term evolution advanced
  • the network device involved in the embodiments of the present disclosure may be a base station, and the base station may include multiple cells that provide services for terminals.
  • the base station can also be called an access point, or it can be a device in the access network that communicates with the wireless terminal device through one or more sectors on the air interface, or other names.
  • the network device can be used to interchange received over-the-air frames with Internet Protocol (IP) packets and act as a router between the wireless terminal device and the rest of the access network, which can include the Internet Protocol (IP) communication network.
  • IP Internet Protocol
  • Network devices may also coordinate attribute management for the air interface.
  • the network equipment involved in the embodiments of the present disclosure may be a network equipment (Base Transceiver Station, BTS) in Global System for Mobile communications (GSM) or Code Division Multiple Access (Code Division Multiple Access, CDMA) ), it can also be a network device (NodeB) in Wide-band Code Division Multiple Access (WCDMA), or it can be an evolved network device in a long-term evolution (long term evolution, LTE) system (evolutional Node B, eNB or e-NodeB), 5G base station (gNB) in the 5G network architecture (next generation system), can also be a home evolved base station (Home evolved Node B, HeNB), relay node (relay node) , a home base station (femto), a pico base station (pico), etc., are not limited in this embodiment of the present disclosure.
  • a network device may include a centralized unit (centralized unit, CU) node and a distributed unit (distributed unit, DU) node
  • the terminal involved in the embodiments of the present disclosure may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem.
  • the name of the terminal may be different.
  • the terminal may be called a user terminal or user equipment (User Equipment, UE).
  • UE User Equipment
  • the wireless terminal equipment can communicate with one or more core networks (Core Network, CN) via the radio access network (Radio Access Network, RAN), and the wireless terminal equipment can be a mobile terminal equipment, such as a mobile phone (or called a "cellular "telephones) and computers with mobile terminal equipment, such as portable, pocket, hand-held, computer built-in or vehicle-mounted mobile devices, which exchange language and/or data with the radio access network.
  • a mobile terminal equipment such as a mobile phone (or called a "cellular "telephones) and computers with mobile terminal equipment, such as portable, pocket, hand-held, computer built-in or vehicle-mounted mobile devices, which exchange language and/or data with the radio access network.
  • PCS Personal Communication Service
  • SIP Session Initiated Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • Wireless terminal equipment can also be called system, subscriber unit, subscriber station, mobile station, mobile station, remote station, access point , remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal), user agent (user agent), and user device (user device), which are not limited in the embodiments of the present disclosure.
  • MIMO transmission can be Single User Multi Input Multi Output (SU-MIMO) ) or Multiple User Multi Input Multi Output (Multiple User Multi Input Multi Output, MU-MIMO).
  • MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO, or massive-MIMO, or diversity transmission, precoding transmission, or beamforming transmission, etc.
  • the methods and devices provided by the various embodiments of the present disclosure are based on the same application concept. Since the methods and devices have similar problem-solving principles, the implementation of the devices and methods can be referred to each other, and the repetitions will not be repeated.
  • Fig. 11 is one of the structural schematic diagrams of the communication device provided by the embodiment of the present disclosure, the communication device may be the second receiving end; as shown in Fig. 11, in the case where the second receiving end is a base station, the base station includes a memory 1120, Transceiver 1110 and processor 1100, wherein:
  • the memory 1120 is used for storing computer programs; the transceiver 1110 is used for sending and receiving data under the control of the processor 1100 .
  • Processor 1100 configured to read the computer program in the memory and perform the following operations:
  • the PDCP status report is used to indicate the first data unit successfully transmitted and/or the second data unit failed to transmit in the target data unit;
  • the first communication link is a link formed by the first sending end of the target data unit, the first relay terminal, and the first receiving end of the target data unit;
  • the first receiving end is the same or different from the second receiving end
  • the first sending end is the same or different from the second sending end.
  • the second receiving end can send a PDCP status report to the second sending end, so as to ensure that the second sending end accurately obtains the data that has not been successfully transmitted, and then the second The sending end may perform a retransmission operation on the second data unit that fails to be transmitted based on the PDCP status report, so as to realize lossless data transmission.
  • both the first sending end and the second sending end are first remote terminals.
  • both the first sending end and the second sending end are second remote terminals ;
  • the third base station is the target base station to which the first relay terminal is connected after handover or reestablishment from the second base station; the PDCP status report is based on the second base station by the third base station
  • the sent first transfer data is determined, wherein the first transfer data is used to indicate the first data unit whose transmission is successful and/or the second data unit whose transmission fails in the target data unit.
  • both the first receiving end and the second receiving end are third remote terminals
  • both the first sending end and the second sending end are fourth base stations
  • the The second communication link includes any of the following:
  • the first sending end is a fifth base station
  • the second sending end is a sixth base station
  • the sixth base station is the target base station directly connected to after the fourth remote terminal is handed over, or the sixth base station is the third relay terminal after the fourth remote terminal is handed over or reestablished
  • the target base station connected to; the sixth base station stores the second transfer data sent by the fifth base station, where the second transfer data includes the target data unit.
  • both the first receiving end and the second receiving end are fifth remote terminals
  • both the first sending end and the second sending end are sixth remote terminals
  • the second communication link includes a link connecting the fifth remote terminal to the sixth remote terminal through the first relay terminal.
  • the operation includes: when the second communication link is successfully connected, receiving a first trigger message sent by the second sending end; based on the first trigger message, sending to the second The end sends the PDCP status report.
  • the operation includes: when the second communication link is successfully connected and includes a fourth relay terminal, receiving a second trigger message sent by the fourth relay terminal; based on the second 2. Trigger a message to send the PDCP status report to the second sending end.
  • the second receiving end can send a PDCP status report to the second sending end, so as to ensure that the second sending end accurately obtains the data that has not been successfully transmitted, and then the second The sending end may perform a retransmission operation on the second data unit that fails to be transmitted based on the PDCP status report, so as to realize lossless data transmission.
  • the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 1100 and various circuits of the memory represented by the memory 1120 are linked together.
  • the bus architecture can also link together various other circuits such as peripherals, voltage regulators, and power management circuits, etc., which are well known in the art and thus will not be further described in this disclosure.
  • the bus interface provides the interface.
  • Transceiver 1110 may be a plurality of elements, including a transmitter and a receiver, providing a unit for communicating with various other devices over transmission media, including wireless channels, wired channels, optical cables, and other transmission media.
  • the processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1120 can store data used by the processor 1100 when performing operations.
  • the processor 1100 may be a central processing unit (Central Processing Unit, CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field-Programmable Gate Array, FPGA) or a complex programmable Logic device (Complex Programmable Logic Device, CPLD), the processor can also adopt a multi-core architecture.
  • CPU Central Processing Unit
  • ASIC Application Specific Integrated Circuit
  • FPGA Field-Programmable Gate Array
  • CPLD Complex Programmable Logic Device
  • the processor 1100 is configured to execute any of the methods provided in the embodiments of the present disclosure according to the obtained executable instructions by calling the computer program stored in the memory 1120 .
  • the processor 1100 and the memory 1120 may also be arranged physically separately.
  • Fig. 12 is the second schematic structural diagram of a communication device provided by an embodiment of the present disclosure.
  • the communication device may be a second receiving end.
  • the terminal when the second receiving end is a remote terminal, the terminal includes a memory 1220, transceiver 1210 and processor 1200, wherein:
  • the memory 1220 is used to store computer programs; the transceiver 1210 is used to send and receive data under the control of the processor 1200 .
  • Processor 1200 configured to read the computer program in the memory and perform the following operations:
  • the PDCP status report is used to indicate the first data unit successfully transmitted and/or the second data unit failed to transmit in the target data unit;
  • the first communication link is a link formed by the first sending end of the target data unit, the first relay terminal, and the first receiving end of the target data unit;
  • the first receiving end is the same or different from the second receiving end
  • the first sending end is the same or different from the second sending end.
  • the second receiving end can send a PDCP status report to the second sending end, so as to ensure that the second sending end accurately obtains the data that has not been successfully transmitted, and then the second The sending end may perform a retransmission operation on the second data unit that fails to be transmitted based on the PDCP status report, so as to realize lossless data transmission.
  • both the first sending end and the second sending end are first remote terminals.
  • both the first sending end and the second sending end are second remote terminals ;
  • the third base station is the target base station to which the first relay terminal is connected after handover or reestablishment from the second base station; the PDCP status report is based on the second base station by the third base station
  • the sent first transfer data is determined, wherein the first transfer data is used to indicate the first data unit whose transmission is successful and/or the second data unit whose transmission fails in the target data unit.
  • both the first receiving end and the second receiving end are third remote terminals
  • both the first sending end and the second sending end are fourth base stations
  • the The second communication link includes any of the following:
  • the first sending end is a fifth base station
  • the second sending end is a sixth base station
  • the sixth base station is the target base station directly connected to after the fourth remote terminal is handed over, or the sixth base station is the third relay terminal after the fourth remote terminal is handed over or reestablished
  • the target base station connected to; the sixth base station stores the second transfer data sent by the fifth base station, where the second transfer data includes the target data unit.
  • both the first receiving end and the second receiving end are fifth remote terminals
  • both the first sending end and the second sending end are sixth remote terminals
  • the second communication link includes a link connecting the fifth remote terminal to the sixth remote terminal through the first relay terminal.
  • the operation includes: when the second communication link is successfully connected, receiving a first trigger message sent by the second sending end; based on the first trigger message, sending to the second The end sends the PDCP status report.
  • the operation includes: when the second communication link is successfully connected and includes a fourth relay terminal, receiving a second trigger message sent by the fourth relay terminal; based on the second 2. Trigger a message to send the PDCP status report to the second sending end.
  • the second receiving end can send a PDCP status report to the second sending end, so as to ensure that the second sending end accurately obtains the data that has not been successfully transmitted, and then the second The sending end may perform a retransmission operation on the second data unit that fails to be transmitted based on the PDCP status report, so as to realize lossless data transmission.
  • the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 1200 and various circuits of the memory represented by the memory 1220 are linked together.
  • the bus architecture can also link together various other circuits such as peripherals, voltage regulators, and power management circuits, etc., which are well known in the art and thus will not be further described in this disclosure.
  • the bus interface provides the interface.
  • the transceiver 1210 may be a plurality of elements, including a transmitter and a receiver, providing a unit for communicating with various other devices over transmission media, including wireless channels, wired channels, optical cables, and other transmission media.
  • the user interface 1230 may also be an interface capable of connecting externally and internally to required equipment, and the connected equipment includes but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • the processor 1200 is responsible for managing the bus architecture and general processing, and the memory 1220 can store data used by the processor 1200 when performing operations.
  • the processor 1200 may be a central processing unit (Central Processing Unit, CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field-Programmable Gate Array, FPGA) or a complex programmable Logic device (Complex Programmable Logic Device, CPLD), the processor can also adopt a multi-core architecture.
  • CPU Central Processing Unit
  • ASIC Application Specific Integrated Circuit
  • FPGA Field-Programmable Gate Array
  • CPLD Complex Programmable Logic Device
  • the processor 1200 is configured to execute any one of the methods provided in the embodiments of the present disclosure according to the obtained executable instructions by calling the computer program stored in the memory 1220 .
  • the processor 1200 and the memory 1220 may also be arranged physically separately.
  • the above-mentioned target network device provided by the embodiments of the present disclosure can implement all the method steps implemented by the above-mentioned method embodiments, and can achieve the same technical effect.
  • the same parts and beneficial effects as the example are described in detail.
  • Fig. 13 is a schematic structural diagram of a device for sending a packet data convergence protocol status report provided by an embodiment of the present disclosure. As shown in Fig. 13 , the device includes:
  • the sending module 1300 is configured to, after a partial connection failure between the first receiving end and the first relay terminal in the first communication link, if the second receiving end of the target data unit determines to send the second sending of the target data unit If the second communication link between the terminals is successfully connected, a PDCP status report is sent to the second sending terminal of the target data unit;
  • the PDCP status report is used to indicate the first data unit successfully transmitted and/or the second data unit failed to transmit in the target data unit;
  • the first communication link is a link formed by the first sending end of the target data unit, the first relay terminal, and the first receiving end of the target data unit;
  • the first receiving end is the same or different from the second receiving end
  • the first sending end is the same or different from the second sending end.
  • the second receiving end can send a PDCP status report to the second sending end, so as to ensure that the second sending end can accurately know the unsuccessful transmission The data, and then the second sending end can perform a retransmission operation on the second data unit that fails to be transmitted based on the PDCP status report, so as to realize lossless data transmission.
  • both the first sending end and the second sending end are first remote terminals.
  • both the first sending end and the second sending end are second remote terminals ;
  • the third base station is the target base station to which the first relay terminal is connected after handover or reestablishment from the second base station; the PDCP status report is based on the second base station by the third base station
  • the sent first transfer data is determined, wherein the first transfer data is used to indicate the first data unit whose transmission is successful and/or the second data unit whose transmission fails in the target data unit.
  • both the first receiving end and the second receiving end are third remote terminals
  • both the first sending end and the second sending end are fourth base stations
  • the The second communication link includes any of the following:
  • the first sending end is a fifth base station
  • the second sending end is a sixth base station
  • the sixth base station is the target base station directly connected to after the fourth remote terminal is handed over, or the sixth base station is the third relay terminal after the fourth remote terminal is handed over or reestablished The target base station to connect to;
  • the sixth base station stores the second transfer data sent by the fifth base station, where the second transfer data includes the target data unit.
  • both the first receiving end and the second receiving end are fifth remote terminals
  • both the first sending end and the second sending end are sixth remote terminals
  • the second communication link includes a link connecting the fifth remote terminal to the sixth remote terminal through the first relay terminal.
  • the sending module of the device includes:
  • the first receiving unit is configured to receive the first trigger message sent by the second sending end when the second communication link is successfully connected
  • the first sending unit is configured to send the PDCP status report to the second sending end based on the first trigger message.
  • the sending module of the device includes:
  • the second receiving unit is configured to receive a second trigger message sent by the fourth relay terminal when the second communication link is successfully connected and includes a fourth relay terminal;
  • the second sending unit is configured to send the PDCP status report to the second sending end based on the second trigger message.
  • the second receiving end can send a PDCP status report to the second sending end, so as to ensure that the second sending end can accurately know the unsuccessful transmission The data, and then the second sending end can perform a retransmission operation on the second data unit that fails to be transmitted based on the PDCP status report, so as to realize lossless data transmission.
  • each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.
  • the integrated unit is implemented in the form of a software function unit and sold or used as an independent product, it can be stored in a processor-readable storage medium.
  • the essence of the technical solution of the present disclosure or the part that contributes to the related technology or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium.
  • a computer device which may be a personal computer, a server, or a network device, etc.
  • a processor processor
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disc and other media that can store program codes. .
  • the embodiments of the present disclosure further provide a processor-readable storage medium, the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the above-mentioned embodiments.
  • a method for sending a packet data convergence protocol status report including:
  • the PDCP status report is used to indicate the first data unit successfully transmitted and/or the second data unit failed to transmit in the target data unit;
  • the first communication link is a link formed by the first sending end of the target data unit, the first relay terminal, and the first receiving end of the target data unit;
  • the first receiving end is the same or different from the second receiving end
  • the first sending end is the same or different from the second sending end.
  • the processor-readable storage medium can be any available medium or data storage device that can be accessed by a processor, including but not limited to magnetic storage (e.g., floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.), optical storage (e.g., CD, DVD, BD, HVD, etc.), and semiconductor memory (such as ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state drive (SSD)), etc.
  • magnetic storage e.g., floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.
  • optical storage e.g., CD, DVD, BD, HVD, etc.
  • semiconductor memory such as ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state drive (SSD)
  • the embodiments of the present disclosure may be provided as methods, systems, or computer program products. Accordingly, the present disclosure can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, optical storage, etc.) having computer-usable program code embodied therein.
  • processor-executable instructions may also be stored in a processor-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, such that the instructions stored in the processor-readable memory produce a manufacturing product, the instruction device realizes the functions specified in one or more procedures of the flow chart and/or one or more blocks of the block diagram.
  • processor-executable instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented
  • the executed instructions provide steps for implementing the functions specified in the procedure or procedures of the flowchart and/or the block or blocks of the block diagrams.

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Abstract

本公开实施例提供一种分组数据汇聚协议状态报告发送方法、设备及装置，所述方法包括：在第一通信链路中的第一接收端和第一中继终端之间的部分连接失败之后，目标数据单元的第二接收端若确定和目标数据单元的第二发送端之间的第二通信链路连接成功，则向第二发送端发送PDCP状态报告；PDCP状态报告用于指示目标数据单元中传输成功的第一数据单元和/或传输失败的第二数据单元；第一通信链路为目标数据单元的第一发送端、第一中继终端和目标数据单元的第一接收端组成的链路；第一接收端和第二接收端相同或不同，第一发送端和第二发送端相同或不同。本公开实施例通过保证第二发送端准确获知未成功传输的数据实现数据的无损传输。

Description

分组数据汇聚协议状态报告发送方法、设备及装置
相关申请的交叉引用
本申请要求于2021年07月28日提交的申请号为2021108601158，发明名称为“分组数据汇聚协议状态报告发送方法、设备及装置”的中国专利申请的优先权，其通过引用方式全部并入本文。
技术领域
本公开涉及无线通信技术领域，尤其涉及一种分组数据汇聚协议状态报告发送方法、设备及装置。
背景技术
传统的无线通信采用蜂窝网络通信方式，即终端和网络侧设备通过用户终端和陆地无线接入网之间的接口(Interface between UE and UTRAN，Uu)进行上下行数据/控制信息的传输。为了扩展网络覆盖，一种解决方案就是引入终端到网络的中继(UE-to-Network Relay)。UE-to-Network Relay可以是一个具有中继功能的终端，对于UE-to-Network Relay，中继终端(Relay UE)和网络之间的接口使用Uu接口，和被中继终端(可称为远端终端)之间使用直接通信接口，Relay和网络之间的链路对远端终端而言可以称为回程链路(Backhaul link，BH)。
现有机制高层触发分组数据汇聚协议(Packet Data Convergence Protocol，PDCP)状态报告是基于UE发生切换或路径转换等导致的PDCP重建或PDCP数据恢复。在中继场景中，当Relay UE与基站间的Uu接口发生无线链路失败，Uu接口链路无法传输数据，远端终端(Remote UE)通过PC5(Proximity Communication Port 5，接近通信端口5)接口发送到Relay UE的数据和信令都无法传输给基站，造成数据包丢失；或者当Relay UE与Remote UE之间的PC5接口发生无线链路失败，PC5接口链路无法传输数据，基站通过Uu接口 发送到Relay UE的数据和信令都无法传输到Remote UE，造成数据包丢失。因此，如何在中继场景下实现数据包的无损传输，成为亟需解决的问题。
发明内容
针对相关技术存在的问题，本公开实施例提供一种分组数据汇聚协议状态报告发送方法、设备及装置，用以解决相关技术中的中继场景中存在数据包丢失的缺陷，实现了数据无损传输。
第一方面，本公开实施例提供一种分组数据汇聚协议状态报告发送方法，包括：
在第一通信链路中的第一接收端和第一中继终端之间的部分连接失败之后，目标数据单元的第二接收端若确定和目标数据单元的第二发送端之间的第二通信链路连接成功，则向所述目标数据单元的第二发送端发送分组数据汇聚协议PDCP状态报告；
其中，所述PDCP状态报告用于指示所述目标数据单元中传输成功的第一数据单元和/或传输失败的第二数据单元；
所述第一通信链路为所述目标数据单元的第一发送端、第一中继终端和所述目标数据单元的第一接收端组成的链路；
所述第一接收端和所述第二接收端相同或不同，所述第一发送端和所述第二发送端相同或不同。
可选地，在所述第一接收端和所述第二接收端均为第一基站的情况下，所述第一发送端和所述第二发送端均为第一远端终端。
可选地，在所述第一接收端为第二基站且所述第二接收端为第三基站的情况下，所述第一发送端和所述第二发送端均为第二远端终端；
其中，所述第三基站为所述第一中继终端从所述第二基站进行切换或重建后连接到的目标基站；所述PDCP状态报告是由所述第三基站基于所述第二基站发送的第一转移数据确定，其中，所述第一转移数据用于指示所述目标数据单元中传输成功的第一数据单元和/或传输失败的第二数据单元。
可选地，在所述第一接收端和所述第二接收端均为第三远端终端的情况 下，所述第一发送端和所述第二发送端均为第四基站，所述第二通信链路包括以下任一项：
所述第三远端终端通过第一中继终端和所述第四基站相连的链路；
所述第三远端终端通过第二中继终端和所述第四基站相连的链路；
所述第三远端终端和所述第四基站直接相连的链路。
可选地，在所述第一接收端和所述第二接收端均为第四远端终端的情况下，所述第一发送端为第五基站，所述第二发送端为第六基站；
其中，所述第六基站为所述第四远端终端进行切换后直接连接到的目标基站，或所述第六基站为所述第四远端终端进行切换或重建后通过第三中继终端连接到的目标基站；所述第六基站保存有所述第五基站发送的第二转移数据，所述第二转移数据包括所述目标数据单元。
可选地，在所述第一接收端和所述第二接收端均为第五远端终端的情况下，所述第一发送端和所述第二发送端均为第六远端终端；所述第二通信链路包括所述第五远端终端通过所述第一中继终端和所述第六远端终端相连的链路。
可选地，所述目标数据单元的第二接收端若确定和所述目标数据单元的第二发送端之间的第二通信链路连接成功，则向所述目标数据单元的第二发送端发送分组数据汇聚协议PDCP状态报告，包括：
在第二通信链路连接成功的情况下，接收所述第二发送端发送的第一触发消息；基于所述第一触发消息，向所述第二发送端发送所述PDCP状态报告。
可选地，所述目标数据单元的第二接收端若确定和所述目标数据单元的第二发送端之间的第二通信链路连接成功，则向所述目标数据单元的第二发送端发送分组数据汇聚协议PDCP状态报告，包括：
在所述第二通信链路连接成功且包括第四中继终端的情况下，接收所述第四中继终端发送的第二触发消息；基于所述第二触发消息，向所述第二发送端发送所述PDCP状态报告。
第二方面，本公开实施例还提供一种通信设备，包括存储器，收发机， 处理器，其中：存储器，用于存储计算机程序；收发机，用于在所述处理器的控制下收发数据；处理器，用于读取所述存储器中的计算机程序并实现如上所述第一方面所述的分组数据汇聚协议状态报告发送方法的步骤。
第三方面，本公开实施例还提供一种分组数据汇聚协议状态报告发送装置，包括：
发送模块，用于在第一通信链路中的第一接收端和第一中继终端之间的部分连接失败之后，目标数据单元的第二接收端若确定和目标数据单元的第二发送端之间的第二通信链路连接成功，则向所述目标数据单元的第二发送端发送分组数据汇聚协议PDCP状态报告；
其中，所述PDCP状态报告用于指示所述目标数据单元中传输成功的第一数据单元和/或传输失败的第二数据单元；
所述第一通信链路为所述目标数据单元的第一发送端、第一中继终端和所述目标数据单元的第一接收端组成的链路；
所述第一接收端和所述第二接收端相同或不同，所述第一发送端和所述第二发送端相同或不同。
第四方面，本公开实施例还提供一种处理器可读存储介质，所述处理器可读存储介质存储有计算机程序，所述计算机程序用于使所述处理器执行如上所述第一方面所述的分组数据汇聚协议状态报告发送方法的步骤。
本公开实施例提供的一种分组数据汇聚协议状态报告发送方法、设备、装置及存储介质，在第二通信链路连接成功后，第二接收端可以向第二发送端发送PDCP状态报告，保证第二发送端准确获知未成功传输的数据，进而第二发送端可以基于PDCP状态报告对传输失败的第二数据单元执行重传操作，实现数据的无损传输。
附图说明
为了更清楚地说明本公开实施例或相关技术中的技术方案，下面将对实施例或相关技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本公开的一些实施例，对于本领域普通技术人员来讲，在 不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是相关技术提供的传统无线通信方式示意图；
图2是相关技术提供的设备到设备直接通信方式示意图；
图3是相关技术提供的UE-to-Network Relay示意图；
图4是相关技术提供的L2 UE-to-Network Relay用户面协议栈示意图；
图5是相关技术提供的L2 UE-to-UE Relay用户面协议栈示意图；
图6是相关技术提供的PDCP status report格式示意图；
图7是本公开实施例提供的分组数据汇聚协议状态报告发送方法的流程示意图之一；
图8是本公开实施例提供的分组数据汇聚协议状态报告发送方法的流程示意图之二；
图9是本公开实施例提供的分组数据汇聚协议状态报告发送方法的流程示意图之三；
图10是本公开实施例提供的分组数据汇聚协议状态报告发送方法的流程示意图之四；
图11是本公开实施例提供的通信设备的结构示意图之一；
图12是本公开实施例提供的通信设备的结构示意图之二；
图13是本公开实施例提供的分组数据汇聚协议状态报告发送装置的结构示意图。
具体实施方式
本公开实施例中术语“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。字符“/”一般表示前后关联对象是一种“或”的关系。
本公开实施例中术语“多个”是指两个或两个以上，其它量词与之类似。
下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本公开一部分实施例，并 不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
为了便于更加清晰地理解本公开各实施例，首先对一些相关的背景知识进行如下介绍。
(1)蜂窝网络通信；
图1是相关技术提供的传统无线通信方式示意图，如图1所示，传统的无线通信采用蜂窝网络通信方式，即终端和网络侧设备通过Uu接口进行上下行数据/控制信息的传输。
(2)直接通信；
图2是相关技术提供的设备到设备直接通信方式示意图，如图2所示，直接通信是指邻近的终端可以在近距离范围内通过直接通信链路(也称为Sidelink或者PC5)进行数据传输的方式。Sidelink链路对应的无线接口称为直接通信接口(也称为Sidelink接口或者PC5接口)。
(3)UE-to-Network Relay；
图3是相关技术提供的UE-to-Network Relay示意图，如图3所示，为了扩展网络覆盖，可以引入UE-to-Network Relay。UE-to-Network Relay作为中继(Relay)的节点本身可以是具有中继功能的终端。对于UE-to-Network Relay，中继和网络之间的接口使用Uu接口，和被中继UE(远端UE)之间的接口使用直接通信接口(也称为Sidelink接口或者PC5接口)。中继和网络之间的链路对远端UE而言可以称为回程链路(Backhaul link)。
(4)L2 UE-to-Network Relay和UE-to-UE relay用户面协议栈；
图4是相关技术提供的L2 UE-to-Network Relay用户面协议栈示意图，图5是相关技术提供的L2 UE-to-UE Relay用户面协议栈示意图，如图4和图5所示，无论是L2终端到网络(UE-to-Network，U2N)relay还是L2终端到终端(UE-to-UE，U2U)relay，PDCP及以上各层为端到端的协议栈，适配层和无线链路控制(RLC Radio Link Control，RLC)及以下各层为逐跳的协议栈。
(5)PDCP状态报告(PDCP status report)；
图6是相关技术提供的PDCP status report格式示意图，如图6所示，PDCP status report用于接收端向发送端报告数据接收情况。其中D/C为0指示为控制协议数据单元(Protocol Data Unit，PDU)，PDU type设为000，代表这个PDCP控制PDU为PDCP status report。FMC(Fist Missing COUNT，第一个丢失的分组数据汇聚协议服务数据单元的COUNT值)设为第一个丢失的PDCP服务数据单元(Service Data UnitSDU)的COUNT值。位图(Bitmap)用于指示FMC后每个PDCP SDU是否正确接收，如表1所示，当发送端PDCP接收到PDCP status report，则将COUNT值小于FMC的PDCP SDU和Bitmap中对应COUNT值位置取值为1的PDCP SDU丢弃。现有PDCP状态报告触发条件如下：对于确认模式(Acknowledged Mode，AM)数据无线承载(Data Radio Bearer，DRB)的触发条件包括，高层请求PDCP实体重建、高层请求PDCP数据恢复、高层请求上行数据转移以及配置了daps-SourceRelease且高层重配PDCP实体释放双活动协议栈(DualActive Protocol Stack，DAPS)；对于无确认模式(Unacknowledged Mode，UM)DRB的触发条件包括高层请求上行数据转移；对于sidelink AM DRB的触发条件包括高层请求PDCP实体重建。
表1 位图(Bitmap)
Figure PCTCN2022107900-appb-000001
目前，相关技术中的中继场景中存在数据包丢失的缺陷，本公开各实施例提供的分组数据汇聚协议状态报告发送方法、设备及装置可以实现数据无损传输。
图7是本公开实施例提供的分组数据汇聚协议状态报告发送方法的流程示意图之一，如图7所示，该方法包括如下步骤：
步骤700，在第一通信链路中的第一接收端和第一中继终端之间的部分 连接失败之后，目标数据单元的第二接收端若确定和目标数据单元的第二发送端之间的第二通信链路连接成功，则向所述目标数据单元的第二发送端发送PDCP状态报告；
其中，所述PDCP状态报告用于指示所述目标数据单元中传输成功的第一数据单元和/或传输失败的第二数据单元；
所述第一通信链路为所述目标数据单元的第一发送端、第一中继终端和所述目标数据单元的第一接收端组成的链路；
所述第一接收端和所述第二接收端相同或不同，所述第一发送端和所述第二发送端相同或不同。
具体的，目标数据单元可以是需要从发送端发送到接收端的数据单元。接收端可以是远端终端或基站，相应的，发送端可以是基站或远端终端。
可选地，分组数据汇聚协议状态报告发送方法的执行主体可以是目标数据单元的第二接收端。
可选地，第一发送端和第一接收端之间的通信链路可以包括第一中继终端，第一发送端和第一接收端之间的通信链路可以是第一通信链路。
可选地，在第一发送端是远端终端设备且第一接收端是基站设备的情况下，第一通信链路中的第一接收端和第一中继终端之间的部分连接失败的情况可以是：第一中继终端和第一接收端之间的Uu接口无线链路失败。
可选地，在第一发送端是基站设备且第一接收端是远端终端设备的情况下，第一通信链路中的第一接收端和第一中继终端之间的部分连接失败的情况可以是：第一中继终端和第一接收端之间的PC5接口无线链路失败。
可选地，在第一发送端是远端终端设备且第一接收端是远端终端设备的情况下，第一通信链路中的第一接收端和第一中继终端之间的部分连接失败的情况可以是：第一中继终端和第一接收端之间的PC5接口无线链路失败。
可选地，当第一通信链路中的第一接收端和第一中继终端之间的部分连接失败后，会对第一发送端和第一接收端之间的链路进行RRC重建，RRC重建成功后的第二通信链路中，发送端可以为第二发送端，接收端可以为第二接收端。
可选地，第一接收端和所述第二接收端相同或不同，所述第一发送端和所述第二发送端相同或不同。
可选地，在传输失败的第二数据单元被重传之前，第二数据单元可以一直保存在目标数据单元的第一发送端中，即不会被第一发送端删除。
下面对第一通信链路中的第一接收端和第一中继终端之间的部分连接失败情况下的几种可选地RRC重建方案进行举例说明。
例如，在第一发送端是远端终端设备且第一接收端是基站设备的情况下，第一发送端可以是远端终端Remote UE1，第一接收端可以是基站BS1(Base Station 1)，第一中继终端可以是中继终端Relay UE1，中继终端Relay UE1和基站BS1之间的Uu接口无线链路失败后，对链路进行RRC重建，远端终端Remote UE1可以通过中继终端Relay UE1与基站BS1重新建立第二通信链路的连接，在此情况下，第一接收端和第二接收端均为基站BS1，同时，第一发送端和第二发送端均为远端终端Remote UE1。
例如，在第一发送端是远端终端设备且第一接收端是基站设备的情况下，第一发送端可以是远端终端Remote UE2，第一接收端可以是基站BS2，第一中继终端可以是中继终端Relay UE1，中继终端Relay UE1和基站BS2之间的Uu接口无线链路失败后，对链路进行RRC重建，远端终端Remote UE2可以通过中继终端Relay UE1与一个目标基站BS3建立第二通信链路的连接，在此情况下，第二发送端为远端终端Remote UE2，第二接收端为目标基站BS3。
例如，在第一发送端是基站设备且第一接收端是远端终端设备的情况下，第一发送端可以是基站BS4，第一接收端可以是远端终端Remote UE3，第一中继终端可以是中继终端Relay UE1，中继终端Relay UE1和远端终端Remote UE3之间的PC5接口无线链路失败后，对链路进行RRC重建，远端终端Remote UE3可以与基站BS4重新建立第二通信链路的连接，在此情况下，第二通信链路可以是远端终端Remote UE3通过中继终端Relay UE1和基站BS4相连接的链路，第二通信链路可以是远端终端Remote UE3通过另一个中继终端Relay UE2和基站BS4相连接的链路，第二通信链路还可以是远端终端 Remote UE3与基站BS4直接相连接的链路。
例如，在第一发送端是基站设备且第一接收端是远端终端设备的情况下，第一发送端可以是基站BS5，第一接收端可以是远端终端Remote UE4，第一中继终端可以是中继终端Relay UE1，中继终端Relay UE1和远端终端Remote UE4之间的PC5接口无线链路失败后，对链路进行RRC重建，远端终端Remote UE4可以与目标基站BS6建立第二通信链路的连接，在此情况下，第二通信链路可以是远端终端Remote UE4与目标基站BS6直接相连接的链路，第二通信链路还可以是远端终端Remote UE4通过另一个中继终端Relay UE3和目标基站BS6相连接的链路。
例如，在第一发送端是远端终端设备以及第一接收端是远端终端设备的情况下，第一发送端可以是远端终端Remote UE6，第一接收端可以是远端终端Remote UE5，第一中继终端可以是中继终端Relay UE1，中继终端Relay UE1和远端终端Remote UE5之间的PC5接口无线链路失败后，对链路进行RRC重建，远端终端Remote UE6可以通过中继终端Relay UE1与远端终端Remote UE5重新建立第二通信链路的连接，在此情况下，第一接收端和第二接收端均为Remote UE5，同时，第一发送端和第二发送端均为远端终端Remote UE6。
可选地，在第二接收端确定和第二发送端之间的第二通信链路连接成功后，可以将PDCP状态报告发送到第二发送端。第二发送端在接收到PDCP状态报告后，可以基于PDCP状态报告获知目标数据单元中传输成功的第一数据单元和/或传输失败的第二数据单元。第二发送端可以对第二数据单元执行重传操作，使得第二接收端接收到第二数据单元。
可选地，在第一通信链路中的第一接收端和第一中继终端之间的部分连接失败的情况下，第一发送端可以对目标数据进行持续保存，以使得第二数据单元不被第一发送端删除。例如，在第一通信链路中的第一接收端和第一中继终端之间的部分连接失败之后，第一中继终端发送链路故障的消息到第一发送端，第一发送端基于该消息可以启动“不基于RLC数据传输成功指示进行数据包删除操作”的机制，进而保证第二数据单元不被第一发送端删除。
可选地，在第二通信链路连接成功的情况下，第二发送端可以从“不基于RLC数据传输成功指示进行数据包删除操作”的机制变更为“基于RLC数据传输成功指示进行数据包删除操作”的机制。
可选地，在第二通信链路连接成功的情况下，第二接收端可以基于默认机制，将PDCP状态报告发送到第二接收端。
可选地，在第二通信链路连接成功的情况下，第二发送端可以发送一条触发消息到第二接收端，第二接收端可以基于该触发消息，将PDCP状态报告发送到第二接收端。
可选地，在第二通信链路连接成功且包括中继终端的情况下，第二通信链路中的中继终端可以发送一条触发消息到第二接收端，第二接收端可以基于该触发消息，将PDCP状态报告发送到第二接收端。
本公开实施例提供的分组数据汇聚协议状态报告发送方法，在第二通信链路连接成功后，第二接收端可以向第二发送端发送PDCP状态报告，保证第二发送端准确获知未成功传输的数据，进而第二发送端可以基于PDCP状态报告对传输失败的第二数据单元执行重传操作，实现数据的无损传输。
可选地，在所述第一接收端和所述第二接收端均为第一基站的情况下，所述第一发送端和所述第二发送端均为第一远端终端。
具体的，对于第一接收端和所述第二接收端均为第一基站，可以理解为，在第一接收端为基站设备的情况下，第一接收端和第二接收端为同一台基站设备，也即第一接收端是第一基站而且第二接收端也是第一基站。
对于第一发送端和第二发送端均为第一远端终端，可以理解为，在第一接收端和第二接收端均为第一基站的情况下，第一发送端和第二发送端可以为同一台远端终端设备，也即第一发送端是第一远端终端而且第二发送端也是第一远端终端。
在本公开实施例中，在第一发送端是远端终端设备而且第一接收端是基站设备的情况下，第一发送端可以是远端终端Remote UE1，第一接收端可以是基站BS1，第一中继终端可以是中继终端Relay UE1，中继终端Relay UE1和基站BS1之间的Uu接口无线链路失败后，对链路进行RRC重建，远端终 端Remote UE1可以通过中继终端Relay UE1与基站BS1重新建立第二通信链路的连接，在此情况下，第一接收端和第二接收端均为基站BS1，同时，第一发送端和第二发送端均为远端终端Remote UE1。
可选地，在所述第一接收端为第二基站且所述第二接收端为第三基站的情况下，所述第一发送端和所述第二发送端均为第二远端终端；
其中，所述第三基站为所述第一中继终端从所述第二基站进行切换或重建后连接到的目标基站；所述PDCP状态报告是由所述第三基站基于所述第二基站发送的第一转移数据确定，其中，所述第一转移数据用于指示所述目标数据单元中传输成功的第一数据单元和/或传输失败的第二数据单元。
具体的，对于所述第一接收端为第二基站且第二接收端为第三基站，可以理解为，在第一接收端为基站设备的情况下，第一接收端可以是第二基站，在RRC重建过程中，第一中继终端可以从第二基站进行切换连接到了目标基站，目标基站可以是第三基站，也即第二接收端可以是第三基站。
对于第一发送端和所述第二发送端均为第二远端终端，可以理解为，在第二接收端为第三基站的情况下，第一发送端和第二发送端可以为同一台远端终端设备，也即第一发送端是第二远端终端而且第二发送端也是第二远端终端。
可选地，在第二通信链路连接成功之后，第一接收端可以向第三基站发送第一转移数据，第一转移数据可以理解为，用于指示所述目标数据单元中传输成功的第一数据单元和/或传输失败的第二数据单元，进而第三基站可以基于第一转移数据生成发送给第二发送端的PDCP状态报告。
在本公开实施例中，在第一发送端是远端终端设备且第一接收端是基站设备的情况下，第一发送端可以是远端终端Remote UE2，第一接收端可以是基站BS2，第一中继终端可以是中继终端Relay UE1，中继终端Relay UE1和基站BS2之间的Uu接口无线链路失败后，对链路进行RRC重建，远端终端Remote UE2可以通过中继终端Relay UE1与一个目标基站BS3建立第二通信链路的连接，在此情况下，第二发送端为远端终端Remote UE2，第二接收端为目标基站BS3。
可选地，在所述第一接收端和所述第二接收端均为第三远端终端的情况下，所述第一发送端和所述第二发送端均为第四基站，所述第二通信链路包括以下任一项：
所述第三远端终端通过第一中继终端和所述第四基站相连的链路；
所述第三远端终端通过第二中继终端和所述第四基站相连的链路；
所述第三远端终端和所述第四基站直接相连的链路。
具体的，对于第一接收端和所述第二接收端均为第三远端终端，可以理解为，第一接收端和第二接收端可以为同一远端终端设备，也即第一接收端是第三远端终端而且第二接收端也是第三远端终端。
对于第一发送端和第二发送端均为第四基站，可以理解为，第一发送端和第二发送端可以为同一基站设备，也即第一发送端是第四基站而且第二发送端也是第四基站。
可选的，在第二通信链路可以是第三远端终端通过第一中继终端和第四基站相连的链路；第二通信链路可以是第三远端终端通过第二中继终端(不同于第一中继终端)和第四基站相连的链路；第二通信链路也可以是第三远端终端和第四基站直接相连的链路。
在本公开实施例中，在第一发送端是基站设备且第一接收端是远端终端设备的情况下，第一发送端可以是基站BS4，第一接收端可以是远端终端Remote UE3，第一中继终端可以是中继终端Relay UE1，中继终端Relay UE1和远端终端Remote UE3之间的PC5接口无线链路失败后，对链路进行RRC重建，远端终端Remote UE3可以与基站BS4重新建立第二通信链路的连接，在此情况下，第二通信链路可以是远端终端Remote UE3通过中继终端Relay UE1和基站BS4相连接的链路，第二通信链路可以是远端终端Remote UE3通过另一个中继终端Relay UE2和基站BS4相连接的链路，第二通信链路还可以是远端终端Remote UE3与基站BS4直接相连接的链路。
可选地，在所述第一接收端和所述第二接收端均为第四远端终端的情况下，所述第一发送端为第五基站，所述第二发送端为第六基站；
其中，所述第六基站为所述第四远端终端进行切换后直接连接到的目标 基站，或所述第六基站为所述第四远端终端进行切换或重建后通过第三中继终端连接到的目标基站；所述第六基站保存有所述第五基站发送的第二转移数据，所述第二转移数据包括所述目标数据单元。
具体的，对于第一接收端和第二接收端均为第四远端终端，可以理解为，第一接收端和第二接收端可以为同一远端终端设备，也即第一接收端是第四远端终端而且第二接收端也是第四远端终端。
对于第一发送端为第五基站，第二发送端为第六基站，可以理解为，第一发送端可以是第五基站，在RRC重建过程中，第四远端终端可以从第五基站进行切换连接到了目标基站，目标基站可以是第六基站，也即第二发送端为第六基站。
可选地，第六基站可以是第四远端终端进行切换后直接连接到的目标基站；第六基站也可以是第四远端终端进行切换后通过第三中继终端(不同于第一中继终端)连接到的目标基站。
可选地，在第二通信链路连接成功之后，第五基站可以向第六基站发送第二转移数据，第二转移数据中可以包括目标数据单元，使得第六基站可以根据第二接收端发送PDCP状态报告获知目标数据单元中传输失败的第二数据单元后，对第二数据单元执行重传操作。
在本公开实施例中，在第一发送端是基站设备且第一接收端是远端终端设备的情况下，第一发送端可以是基站BS5，第一接收端可以是远端终端Remote UE4，第一中继终端可以是中继终端Relay UE1，中继终端Relay UE1和远端终端Remote UE4之间的PC5接口无线链路失败后，对链路进行RRC重建，远端终端Remote UE4可以与目标基站BS6建立第二通信链路的连接，在此情况下，第二通信链路可以是远端终端Remote UE4与目标基站BS6直接相连接的链路，第二通信链路还可以是远端终端Remote UE4通过另一个中继终端Relay UE3和目标基站BS6相连接的链路。
可选地，在所述第一接收端和所述第二接收端均为第五远端终端的情况下，所述第一发送端和所述第二发送端均为第六远端终端；所述第二通信链路包括所述第五远端终端通过所述第一中继终端和所述第六远端终端相连的 链路。
具体的，对于第一接收端和所述第二接收端均为第五远端终端，可以理解为，在第一接收端为远端终端设备的情况下，第一接收端和第二接收端为同一台远端终端设备，也即第一接收端是第五远端终端而且第二接收端也是第五远端终端。
对于第一发送端和第二发送端均为第六远端终端，可以理解为，在第一接收端和第二接收端均为第五远端终端的情况下，第一发送端和第二发送端可以为同一台远端终端设备，也即第一发送端是第六远端终端而且第二发送端也是第六远端终端。
在本公开实施例中，在第一发送端是远端终端设备以及第一接收端是远端终端设备的情况下，第一发送端可以是远端终端Remote UE6，第一接收端可以是远端终端Remote UE5，第一中继终端可以是中继终端Relay UE1，中继终端Relay UE1和远端终端Remote UE5之间的PC5接口无线链路失败后，对链路进行RRC重建，远端终端Remote UE6可以通过中继终端Relay UE1与远端终端Remote UE5重新建立第二通信链路的连接，在此情况下，第一接收端和第二接收端均为Remote UE5，同时，第一发送端和第二发送端均为远端终端Remote UE6。
可选地，所述方法包括：在第二通信链路连接成功的情况下，接收所述第二发送端发送的第一触发消息；基于所述第一触发消息，向所述第二发送端发送所述PDCP状态报告。
具体的，在第二通信链路连接成功的情况下，第二发送端可以发送一条触发消息(也即第一触发消息)到第二接收端，第二接收端可以基于该触发消息，将PDCP状态报告发送到第二接收端。
可选地，所述方法包括：在所述第二通信链路连接成功且包括第四中继终端的情况下，接收所述第四中继终端发送的第二触发消息；基于所述第二触发消息，向所述第二发送端发送所述PDCP状态报告。
具体的，在第二通信链路连接成功且包括中继终端的情况下，第二通信链路中的中继终端可以发送一条触发消息(也即第二触发消息)到第二接收 端，第二接收端可以基于该触发消息，将PDCP状态报告发送到第二接收端。
图8是本公开实施例提供的分组数据汇聚协议状态报告发送方法的流程示意图之二，如图8所示，本实施例中第一远端终端通过L2第一中继终端接入第一基站，第一中继终端发生Uu接口无线链路失败，之后在第一基站重建成功。其中，各个步骤的具体描述如下：
初始第一远端终端通过第一中继终端驻留在第一基站控制的小区1。
步骤801、数据传输；
具体的，第一远端终端通过第一中继终端与第一基站进行数据传输。
步骤802、Uu接口无线链路失败；
具体的，第一中继终端发生Uu接口无线链路失败。
步骤803、RRC重建；
具体的，第一中继终端触发Uu接口RRC重建过程，并在第一基站重建成功。
步骤804、触发消息；
具体的，第一中继终端向第一基站发送触发消息，用于触发第一基站发送PDCP状态报告。
可选地，第一远端终端可以向第一基站发送触发消息，用于触发第一基站发送PDCP状态报告。
可选地，第一基站可以基于默认机制(不需要触发消息)，发送PDCP状态报告。
步骤805、PDCP status report；
具体的，第一基站向第一远端终端发送上行数据的PDCP status report。
步骤806、数据传输。
具体的，第一远端终端可以基于接收到的PDCP status report对PDCP SDU进行处理，根据FMC和bitmap指示将对端未正确接收的PDCP SDU进行重传。
图9是本公开实施例提供的分组数据汇聚协议状态报告发送方法的流程示意图之三，如图9所示，本实施例中第二远端终端通过L2第一中继终端接 入第二基站，第一中继终端发生Uu接口无线链路失败，之后在第三基站重建成功。其中，各个步骤的具体描述如下：
初始第二远端终端通过第一中继终端驻留在第二基站控制的小区1。
步骤901、数据传输；
具体的，第二远端终端通过第一中继终端与第二基站进行数据传输。
步骤902、Uu接口无线链路失败；
具体的，第一中继终端发生Uu接口无线链路失败。
步骤903、RRC重建；
具体的，第一中继终端触发Uu接口RRC重建过程，并在第三基站重建成功。
步骤904、数据转移；
具体的，第二基站与第三基站间交互中继UE1和其连接的第二远端终端的上下文，并对数据进行转移。
可选地，第二基站向第三基站发送第一转移数据，用于指示所述目标数据单元中传输成功的第一数据单元和/或传输失败的第二数据单元，进而第三基站可以基于第一转移数据生成发送给第二远端终端的PDCP状态报告。
步骤905、触发消息；
具体的，第一中继终端向第三基站发送触发消息，用于触发第三基站发送PDCP状态报告。
可选地，第二远端终端可以向第三基站发送触发消息，用于触发第三基站发送PDCP状态报告。
可选地，第三基站可以基于默认机制(不需要触发消息)，发送PDCP状态报告。
步骤906、PDCP status report；
具体的，第三基站向第二远端终端发送上行数据的PDCP status report
步骤907、数据传输。
具体的，第三基站可以基于收到的PDCP status report对PDCP SDU进行处理，根据FMC和bitmap指示将对端未正确接收的PDCP SDU进行重传。
图10是本公开实施例提供的分组数据汇聚协议状态报告发送方法的流程示意图之四，如图10所示，本实施例中第六远端终端通过L2第一中继终端接入第五远端终端，第一中继终端与第五远端终端的PC5接口无线链路失败，之后RRC重建成功。其中，各个步骤的具体描述如下：
初始第六远端终端通过第一中继终端与第五远端终端通信。
步骤1001、数据传输；
具体的，第六远端终端通过第一中继终端与第五远端终端进行数据传输。
步骤1002、第一中继终端与第五远端终端的PC5接口无线链路失败；
步骤1003、RRC重建；
具体的，第一中继终端触发PC5接口RRC重建过程，并与第五远端终端重建成功。
步骤1004、触发消息；
具体的，第一中继终端向第五远端终端发送触发消息，用于触发第五远端终端发送PDCP状态报告。
可选地，第六远端终端可以向第五远端终端发送触发消息，用于触发基站1发送PDCP状态报告。
可选地，第五远端终端可以基于默认机制(不需要触发消息)，发送PDCP状态报告。
步骤1005、PDCP status report；
具体的，第五远端终端向第六远端终端发送上行数据的PDCP status report。
步骤1006、数据传输。
具体的，第六远端终端可以基于接收到的PDCP status report对PDCP SDU进行处理，根据FMC和bitmap指示将对端未正确接收的PDCP SDU进行重传。
本公开实施例提供的分组数据汇聚协议状态报告发送方法，在第二通信链路连接成功后，第二接收端可以向第二发送端发送PDCP状态报告，保证第二发送端准确获知未成功传输的数据，进而第二发送端可以基于PDCP状 态报告对传输失败的第二数据单元执行重传操作，实现数据的无损传输。
本公开实施例提供的技术方案可以适用于多种系统，尤其是5G系统。例如适用的系统可以是全球移动通讯(global system of mobile communication，GSM)系统、码分多址(code division multiple access，CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)通用分组无线业务(general packet radio service，GPRS)系统、长期演进(long term evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)系统、高级长期演进(long term evolution advanced，LTE-A)系统、通用移动系统(universal mobile telecommunication system，UMTS)、全球互联微波接入(worldwide interoperability for microwave access，WiMAX)系统、5G新空口(New Radio,NR)系统等。这多种系统中均包括终端设备和网络设备。系统中还可以包括核心网部分，例如演进的分组系统(Evloved Packet System,EPS)、5G系统(5GS)等。
本公开实施例涉及的网络设备，可以是基站，该基站可以包括多个为终端提供服务的小区。根据具体应用场合不同，基站又可以称为接入点，或者可以是接入网中在空中接口上通过一个或多个扇区与无线终端设备通信的设备，或者其它名称。网络设备可用于将收到的空中帧与网际协议(Internet Protocol，IP)分组进行相互更换，作为无线终端设备与接入网的其余部分之间的路由器，其中接入网的其余部分可包括网际协议(IP)通信网络。网络设备还可协调对空中接口的属性管理。例如，本公开实施例涉及的网络设备可以是全球移动通信系统(Global System for Mobile communications，GSM)或码分多址接入(Code Division Multiple Access，CDMA)中的网络设备(Base Transceiver Station，BTS)，也可以是带宽码分多址接入(Wide-band Code Division Multiple Access，WCDMA)中的网络设备(NodeB)，还可以是长期演进(long term evolution，LTE)系统中的演进型网络设备(evolutional Node B，eNB或e-NodeB)、5G网络架构(next generation system)中的5G基站(gNB)，也可以是家庭演进基站(Home evolved Node B，HeNB)、中继节点 (relay node)、家庭基站(femto)、微微基站(pico)等，本公开实施例中并不限定。在一些网络结构中，网络设备可以包括集中单元(centralized unit，CU)节点和分布单元(distributed unit，DU)节点，集中单元和分布单元也可以地理上分开布置。
本公开实施例涉及的终端，可以是指向用户提供语音和/或数据连通性的设备，具有无线连接功能的手持式设备、或连接到无线调制解调器的其他处理设备等。在不同的系统中，终端的名称可能也不相同，例如在5G系统中，终端可以称为用户终端或用户设备(User Equipment，UE)。无线终端设备可以经无线接入网(Radio Access Network,RAN)与一个或多个核心网(Core Network,CN)进行通信，无线终端设备可以是移动终端设备，如移动电话(或称为“蜂窝”电话)和具有移动终端设备的计算机，例如，可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置，它们与无线接入网交换语言和/或数据。例如，个人通信业务(Personal Communication Service，PCS)电话、无绳电话、会话发起协议(Session Initiated Protocol，SIP)话机、无线本地环路(Wireless Local Loop，WLL)站、个人数字助理(Personal Digital Assistant，PDA)等设备。无线终端设备也可以称为系统、订户单元(subscriber unit)、订户站(subscriber station)，移动站(mobile station)、移动台(mobile)、远程站(remote station)、接入点(access point)、远程终端设备(remote terminal)、接入终端设备(access terminal)、用户终端设备(user terminal)、用户代理(user agent)、用户装置(user device)，本公开实施例中并不限定。
网络设备与终端之间可以各自使用一或多根天线进行多输入多输出(Multi Input Multi Output,MIMO)传输，MIMO传输可以是单用户多输入多输出(Single User Multi Input Multi Output，SU-MIMO)或多用户多输入多输出(Multiple User Multi Input Multi Output，MU-MIMO)。根据根天线组合的形态和数量，MIMO传输可以是2D-MIMO、3D-MIMO、FD-MIMO或massive-MIMO，也可以是分集传输或预编码传输或波束赋形传输等。
本公开各实施例提供的方法和装置是基于同一申请构思的，由于方法和装置解决问题的原理相似，因此装置和方法的实施可以相互参见，重复之处 不再赘述。
图11是本公开实施例提供的通信设备的结构示意图之一，该通信设备可以为第二接收端；如图11所示，在第二接收端为基站的情况下，该基站包括存储器1120，收发机1110和处理器1100，其中：
存储器1120，用于存储计算机程序；收发机1110，用于在处理器1100的控制下收发数据。处理器1100，用于读取所述存储器中的计算机程序并执行以下操作：
在第一通信链路中的第一接收端和第一中继终端之间的部分连接失败之后，目标数据单元的第二接收端若确定和目标数据单元的第二发送端之间的第二通信链路连接成功，则向所述目标数据单元的第二发送端发送PDCP状态报告；
其中，所述PDCP状态报告用于指示所述目标数据单元中传输成功的第一数据单元和/或传输失败的第二数据单元；
所述第一通信链路为所述目标数据单元的第一发送端、第一中继终端和所述目标数据单元的第一接收端组成的链路；
所述第一接收端和所述第二接收端相同或不同，所述第一发送端和所述第二发送端相同或不同。
本公开实施例提供的通信设备，在第二通信链路连接成功后，第二接收端可以向第二发送端发送PDCP状态报告，保证第二发送端准确获知未成功传输的数据，进而第二发送端可以基于PDCP状态报告对传输失败的第二数据单元执行重传操作，实现数据的无损传输。
可选地，在所述第一接收端和所述第二接收端均为第一基站的情况下，所述第一发送端和所述第二发送端均为第一远端终端。
可选地，在所述第一接收端为第二基站且所述第二接收端为第三基站的情况下，所述第一发送端和所述第二发送端均为第二远端终端；
其中，所述第三基站为所述第一中继终端从所述第二基站进行切换或重建后连接到的目标基站；所述PDCP状态报告是由所述第三基站基于所述第二基站发送的第一转移数据确定，其中，所述第一转移数据用于指示所述目 标数据单元中传输成功的第一数据单元和/或传输失败的第二数据单元。
可选地，在所述第一接收端和所述第二接收端均为第三远端终端的情况下，所述第一发送端和所述第二发送端均为第四基站，所述第二通信链路包括以下任一项：
所述第三远端终端通过第一中继终端和所述第四基站相连的链路；
所述第三远端终端通过第二中继终端和所述第四基站相连的链路；所述第三远端终端和所述第四基站直接相连的链路。
可选地，在所述第一接收端和所述第二接收端均为第四远端终端的情况下，所述第一发送端为第五基站，所述第二发送端为第六基站；
其中，所述第六基站为所述第四远端终端进行切换后直接连接到的目标基站，或所述第六基站为所述第四远端终端进行切换或重建后通过第三中继终端连接到的目标基站；所述第六基站保存有所述第五基站发送的第二转移数据，所述第二转移数据包括所述目标数据单元。
可选地，在所述第一接收端和所述第二接收端均为第五远端终端的情况下，所述第一发送端和所述第二发送端均为第六远端终端；所述第二通信链路包括所述第五远端终端通过所述第一中继终端和所述第六远端终端相连的链路。
可选地，所述目标数据单元的第二接收端若确定和所述目标数据单元的第二发送端之间的第二通信链路连接成功，则向所述目标数据单元的第二发送端发送PDCP状态报告，所述操作包括：在第二通信链路连接成功的情况下，接收所述第二发送端发送的第一触发消息；基于所述第一触发消息，向所述第二发送端发送所述PDCP状态报告。
可选地，所述目标数据单元的第二接收端若确定和所述目标数据单元的第二发送端之间的第二通信链路连接成功，则向所述目标数据单元的第二发送端发送PDCP状态报告，所述操作包括：在所述第二通信链路连接成功且包括第四中继终端的情况下，接收所述第四中继终端发送的第二触发消息；基于所述第二触发消息，向所述第二发送端发送所述PDCP状态报告。
本公开实施例提供的通信设备，在第二通信链路连接成功后，第二接收 端可以向第二发送端发送PDCP状态报告，保证第二发送端准确获知未成功传输的数据，进而第二发送端可以基于PDCP状态报告对传输失败的第二数据单元执行重传操作，实现数据的无损传输。
其中，在图11中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器1100代表的一个或多个处理器和存储器1120代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本公开不再对其进行进一步描述。总线接口提供接口。收发机1110可以是多个元件，即包括发送机和接收机，提供用于在传输介质上与各种其他装置通信的单元，这些传输介质包括无线信道、有线信道、光缆等传输介质。
处理器1100负责管理总线架构和通常的处理，存储器1120可以存储处理器1100在执行操作时所使用的数据。
可选地，处理器1100可以是中央处理器(Central Processing Unit,CPU)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现场可编程门阵列(Field－Programmable Gate Array，FPGA)或复杂可编程逻辑器件(Complex Programmable Logic Device，CPLD)，处理器也可以采用多核架构。
处理器1100通过调用存储器1120存储的计算机程序，用于按照获得的可执行指令执行本公开实施例提供的任一所述方法。处理器1100与存储器1120也可以物理上分开布置。
图12是本公开实施例提供的通信设备的结构示意图之二，该通信设备可以为第二接收端，如图12所示，在第二接收端为远端终端的情况下，该终端包括存储器1220，收发机1210和处理器1200，其中：
存储器1220，用于存储计算机程序；收发机1210，用于在处理器1200的控制下收发数据。处理器1200，用于读取所述存储器中的计算机程序并执行以下操作：
在第一通信链路中的第一接收端和第一中继终端之间的部分连接失败之后，目标数据单元的第二接收端若确定和目标数据单元的第二发送端之间的第二通信链路连接成功，则向所述目标数据单元的第二发送端发送PDCP状 态报告；
其中，所述PDCP状态报告用于指示所述目标数据单元中传输成功的第一数据单元和/或传输失败的第二数据单元；
所述第一通信链路为所述目标数据单元的第一发送端、第一中继终端和所述目标数据单元的第一接收端组成的链路；
所述第一接收端和所述第二接收端相同或不同，所述第一发送端和所述第二发送端相同或不同。
本公开实施例提供的通信设备，在第二通信链路连接成功后，第二接收端可以向第二发送端发送PDCP状态报告，保证第二发送端准确获知未成功传输的数据，进而第二发送端可以基于PDCP状态报告对传输失败的第二数据单元执行重传操作，实现数据的无损传输。
可选地，在所述第一接收端和所述第二接收端均为第一基站的情况下，所述第一发送端和所述第二发送端均为第一远端终端。
可选地，在所述第一接收端为第二基站且所述第二接收端为第三基站的情况下，所述第一发送端和所述第二发送端均为第二远端终端；
其中，所述第三基站为所述第一中继终端从所述第二基站进行切换或重建后连接到的目标基站；所述PDCP状态报告是由所述第三基站基于所述第二基站发送的第一转移数据确定，其中，所述第一转移数据用于指示所述目标数据单元中传输成功的第一数据单元和/或传输失败的第二数据单元。
可选地，在所述第一接收端和所述第二接收端均为第三远端终端的情况下，所述第一发送端和所述第二发送端均为第四基站，所述第二通信链路包括以下任一项：
所述第三远端终端通过第一中继终端和所述第四基站相连的链路；
所述第三远端终端通过第二中继终端和所述第四基站相连的链路；
所述第三远端终端和所述第四基站直接相连的链路。
可选地，在所述第一接收端和所述第二接收端均为第四远端终端的情况下，所述第一发送端为第五基站，所述第二发送端为第六基站；
其中，所述第六基站为所述第四远端终端进行切换后直接连接到的目标 基站，或所述第六基站为所述第四远端终端进行切换或重建后通过第三中继终端连接到的目标基站；所述第六基站保存有所述第五基站发送的第二转移数据，所述第二转移数据包括所述目标数据单元。
可选地，在所述第一接收端和所述第二接收端均为第五远端终端的情况下，所述第一发送端和所述第二发送端均为第六远端终端；所述第二通信链路包括所述第五远端终端通过所述第一中继终端和所述第六远端终端相连的链路。
可选地，所述目标数据单元的第二接收端若确定和所述目标数据单元的第二发送端之间的第二通信链路连接成功，则向所述目标数据单元的第二发送端发送PDCP状态报告，所述操作包括：在第二通信链路连接成功的情况下，接收所述第二发送端发送的第一触发消息；基于所述第一触发消息，向所述第二发送端发送所述PDCP状态报告。
可选地，所述目标数据单元的第二接收端若确定和所述目标数据单元的第二发送端之间的第二通信链路连接成功，则向所述目标数据单元的第二发送端发送PDCP状态报告，所述操作包括：在所述第二通信链路连接成功且包括第四中继终端的情况下，接收所述第四中继终端发送的第二触发消息；基于所述第二触发消息，向所述第二发送端发送所述PDCP状态报告。
本公开实施例提供的通信设备，在第二通信链路连接成功后，第二接收端可以向第二发送端发送PDCP状态报告，保证第二发送端准确获知未成功传输的数据，进而第二发送端可以基于PDCP状态报告对传输失败的第二数据单元执行重传操作，实现数据的无损传输。
其中，在图12中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器1200代表的一个或多个处理器和存储器1220代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本公开不再对其进行进一步描述。总线接口提供接口。收发机1210可以是多个元件，即包括发送机和接收机，提供用于在传输介质上与各种其他装置通信的单元，这些传输介质包括无线信道、有线信道、光缆等传输介质。针对不同 的用户设备，用户接口1230还可以是能够外接内接需要设备的接口，连接的设备包括但不限于小键盘、显示器、扬声器、麦克风、操纵杆等。
处理器1200负责管理总线架构和通常的处理，存储器1220可以存储处理器1200在执行操作时所使用的数据。
可选地，处理器1200可以是中央处理器(Central Processing Unit,CPU)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现场可编程门阵列(Field－Programmable Gate Array，FPGA)或复杂可编程逻辑器件(Complex Programmable Logic Device，CPLD)，处理器也可以采用多核架构。
处理器1200通过调用存储器1220存储的计算机程序，用于按照获得的可执行指令执行本公开实施例提供的任一所述方法。处理器1200与存储器1220也可以物理上分开布置。
在此需要说明的是，本公开实施例提供的上述目标网络设备，能够实现上述方法实施例所实现的所有方法步骤，且能够达到相同的技术效果，在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。
图13是本公开实施例提供的分组数据汇聚协议状态报告发送装置的结构示意图，如图13所示，该装置包括：
发送模块1300，用于在第一通信链路中的第一接收端和第一中继终端之间的部分连接失败之后，目标数据单元的第二接收端若确定和目标数据单元的第二发送端之间的第二通信链路连接成功，则向所述目标数据单元的第二发送端发送PDCP状态报告；
其中，所述PDCP状态报告用于指示所述目标数据单元中传输成功的第一数据单元和/或传输失败的第二数据单元；
所述第一通信链路为所述目标数据单元的第一发送端、第一中继终端和所述目标数据单元的第一接收端组成的链路；
所述第一接收端和所述第二接收端相同或不同，所述第一发送端和所述第二发送端相同或不同。
本公开实施例提供的分组数据汇聚协议状态报告发送装置，在第二通信链路连接成功后，第二接收端可以向第二发送端发送PDCP状态报告，保证 第二发送端准确获知未成功传输的数据，进而第二发送端可以基于PDCP状态报告对传输失败的第二数据单元执行重传操作，实现数据的无损传输。
可选地，在所述第一接收端和所述第二接收端均为第一基站的情况下，所述第一发送端和所述第二发送端均为第一远端终端。
可选地，在所述第一接收端为第二基站且所述第二接收端为第三基站的情况下，所述第一发送端和所述第二发送端均为第二远端终端；
其中，所述第三基站为所述第一中继终端从所述第二基站进行切换或重建后连接到的目标基站；所述PDCP状态报告是由所述第三基站基于所述第二基站发送的第一转移数据确定，其中，所述第一转移数据用于指示所述目标数据单元中传输成功的第一数据单元和/或传输失败的第二数据单元。
可选地，在所述第一接收端和所述第二接收端均为第三远端终端的情况下，所述第一发送端和所述第二发送端均为第四基站，所述第二通信链路包括以下任一项：
所述第三远端终端通过第一中继终端和所述第四基站相连的链路；
所述第三远端终端通过第二中继终端和所述第四基站相连的链路；
所述第三远端终端和所述第四基站直接相连的链路。
可选地，在所述第一接收端和所述第二接收端均为第四远端终端的情况下，所述第一发送端为第五基站，所述第二发送端为第六基站；
其中，所述第六基站为所述第四远端终端进行切换后直接连接到的目标基站，或所述第六基站为所述第四远端终端进行切换或重建后通过第三中继终端连接到的目标基站；
所述第六基站保存有所述第五基站发送的第二转移数据，所述第二转移数据包括所述目标数据单元。
可选地，在所述第一接收端和所述第二接收端均为第五远端终端的情况下，所述第一发送端和所述第二发送端均为第六远端终端；所述第二通信链路包括所述第五远端终端通过所述第一中继终端和所述第六远端终端相连的链路。
可选地，所述装置的发送模块包括：
第一接收单元和第一发送单元；
第一接收单元用于在第二通信链路连接成功的情况下，接收所述第二发送端发送的第一触发消息；
第一发送单元用于基于所述第一触发消息，向所述第二发送端发送所述PDCP状态报告。
可选地，所述装置的发送模块包括：
第二接收单元和第二发送单元；
第二接收单元用于在所述第二通信链路连接成功且包括第四中继终端的情况下，接收所述第四中继终端发送的第二触发消息；
第二发送单元用于基于所述第二触发消息，向所述第二发送端发送所述PDCP状态报告。
本公开实施例提供的分组数据汇聚协议状态报告发送装置，在第二通信链路连接成功后，第二接收端可以向第二发送端发送PDCP状态报告，保证第二发送端准确获知未成功传输的数据，进而第二发送端可以基于PDCP状态报告对传输失败的第二数据单元执行重传操作，实现数据的无损传输。
需要说明的是，本公开实施例中对单元的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。另外，在本公开各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个处理器可读取存储介质中。基于这样的理解，本公开的技术方案本质上或者说对相关技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)或处理器(processor)执行本公开各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access  Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
在此需要说明的是，本公开实施例提供的上述装置，能够实现上述方法实施例所实现的所有方法步骤，且能够达到相同的技术效果，在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。
另一方面，本公开实施例还提供一种处理器可读存储介质，所述处理器可读存储介质存储有计算机程序，所述计算机程序用于使所述处理器执行上述各实施例提供的分组数据汇聚协议状态报告发送方法，包括：
在第一通信链路中的第一接收端和第一中继终端之间的部分连接失败之后，目标数据单元的第二接收端若确定和目标数据单元的第二发送端之间的第二通信链路连接成功，则向所述目标数据单元的第二发送端发送PDCP状态报告；
其中，所述PDCP状态报告用于指示所述目标数据单元中传输成功的第一数据单元和/或传输失败的第二数据单元；
所述第一通信链路为所述目标数据单元的第一发送端、第一中继终端和所述目标数据单元的第一接收端组成的链路；
所述第一接收端和所述第二接收端相同或不同，所述第一发送端和所述第二发送端相同或不同。
所述处理器可读存储介质可以是处理器能够存取的任何可用介质或数据存储设备，包括但不限于磁性存储器(例如软盘、硬盘、磁带、磁光盘(MO)等)、光学存储器(例如CD、DVD、BD、HVD等)、以及半导体存储器(例如ROM、EPROM、EEPROM、非易失性存储器(NAND FLASH)、固态硬盘(SSD))等。
本领域内的技术人员应明白，本公开的实施例可提供为方法、系统、或计算机程序产品。因此，本公开可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本公开可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器和光学存储器等)上实施的计算机程序产品的形式。
本公开是参照根据本公开实施例的方法、设备(系统)、和计算机程序产 品的流程图和/或方框图来描述的。应理解可由计算机可执行指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机可执行指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些处理器可执行指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的处理器可读存储器中，使得存储在该处理器可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些处理器可执行指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然，本领域的技术人员可以对本公开进行各种改动和变型而不脱离本公开的精神和范围。这样，倘若本公开的这些修改和变型属于本公开权利要求及其等同技术的范围之内，则本公开也意图包含这些改动和变型在内。

Claims (25)

  1. 一种分组数据汇聚协议状态报告发送方法，其特征在于，包括：
    在第一通信链路中的第一接收端和第一中继终端之间的部分连接失败之后，目标数据单元的第二接收端若确定和目标数据单元的第二发送端之间的第二通信链路连接成功，则向所述目标数据单元的第二发送端发送分组数据汇聚协议PDCP状态报告；
    其中，所述PDCP状态报告用于指示所述目标数据单元中传输成功的第一数据单元和/或传输失败的第二数据单元；所述第一通信链路为所述目标数据单元的第一发送端、第一中继终端和所述目标数据单元的第一接收端组成的链路；
    所述第一接收端和所述第二接收端相同或不同，所述第一发送端和所述第二发送端相同或不同。
  2. 根据权利要求1所述的分组数据汇聚协议状态报告发送方法，其特征在于，在所述第一接收端和所述第二接收端均为第一基站的情况下，所述第一发送端和所述第二发送端均为第一远端终端。
  3. 根据权利要求1所述的分组数据汇聚协议状态报告发送方法，其特征在于，在所述第一接收端为第二基站且所述第二接收端为第三基站的情况下，所述第一发送端和所述第二发送端均为第二远端终端；
    其中，所述第三基站为所述第一中继终端从所述第二基站进行切换或重建后连接到的目标基站；所述PDCP状态报告是由所述第三基站基于所述第二基站发送的第一转移数据确定，其中，所述第一转移数据用于指示所述目标数据单元中传输成功的第一数据单元和/或传输失败的第二数据单元。
  4. 根据权利要求1所述的分组数据汇聚协议状态报告发送方法，其特征在于，在所述第一接收端和所述第二接收端均为第三远端终端的情况下，所述第一发送端和所述第二发送端均为第四基站，所述第二通信链路包括以下任一项：
    所述第三远端终端通过第一中继终端和所述第四基站相连的链路；
    所述第三远端终端通过第二中继终端和所述第四基站相连的链路；
    所述第三远端终端和所述第四基站直接相连的链路。
  5. 根据权利要求1所述的分组数据汇聚协议状态报告发送方法，其特征在于，在所述第一接收端和所述第二接收端均为第四远端终端的情况下，所述第一发送端为第五基站，所述第二发送端为第六基站；
    其中，所述第六基站为所述第四远端终端进行切换后直接连接到的目标基站，或所述第六基站为所述第四远端终端进行切换或重建后通过第三中继终端连接到的目标基站；所述第六基站保存有所述第五基站发送的第二转移数据，所述第二转移数据包括所述目标数据单元。
  6. 根据权利要求1所述的分组数据汇聚协议状态报告发送方法，其特征在于，在所述第一接收端和所述第二接收端均为第五远端终端的情况下，所述第一发送端和所述第二发送端均为第六远端终端；所述第二通信链路包括所述第五远端终端通过所述第一中继终端和所述第六远端终端相连的链路。
  7. 根据权利要求1所述的分组数据汇聚协议状态报告发送方法，其特征在于，所述目标数据单元的第二接收端若确定和所述目标数据单元的第二发送端之间的第二通信链路连接成功，则向所述目标数据单元的第二发送端发送分组数据汇聚协议PDCP状态报告，包括：
    在第二通信链路连接成功的情况下，接收所述第二发送端发送的第一触发消息；
    基于所述第一触发消息，向所述第二发送端发送所述PDCP状态报告。
  8. 根据权利要求1所述的分组数据汇聚协议状态报告发送方法，其特征在于，所述目标数据单元的第二接收端若确定和所述目标数据单元的第二发送端之间的第二通信链路连接成功，则向所述目标数据单元的第二发送端发送分组数据汇聚协议PDCP状态报告，包括：
    在所述第二通信链路连接成功且包括第四中继终端的情况下，接收所述第四中继终端发送的第二触发消息；
    基于所述第二触发消息，向所述第二发送端发送所述PDCP状态报告。
  9. 一种通信设备，包括存储器，收发机，处理器：
    存储器，用于存储计算机程序；收发机，用于在所述处理器的控制下收 发数据；处理器，用于读取所述存储器中的计算机程序并执行以下操作：
    在第一通信链路中的第一接收端和第一中继终端之间的部分连接失败之后，目标数据单元的第二接收端若确定和目标数据单元的第二发送端之间的第二通信链路连接成功，则向所述目标数据单元的第二发送端发送分组数据汇聚协议PDCP状态报告；
    其中，所述PDCP状态报告用于指示所述目标数据单元中传输成功的第一数据单元和/或传输失败的第二数据单元；
    所述第一通信链路为所述目标数据单元的第一发送端、第一中继终端和所述目标数据单元的第一接收端组成的链路；
    所述第一接收端和所述第二接收端相同或不同，所述第一发送端和所述第二发送端相同或不同。
  10. 根据权利要求9所述的通信设备，其特征在于，在所述第一接收端和所述第二接收端均为第一基站的情况下，所述第一发送端和所述第二发送端均为第一远端终端。
  11. 根据权利要求9所述的通信设备，其特征在于，在所述第一接收端为第二基站且所述第二接收端为第三基站的情况下，所述第一发送端和所述第二发送端均为第二远端终端；
    其中，所述第三基站为所述第一中继终端从所述第二基站进行切换或重建后连接到的目标基站；所述PDCP状态报告是由所述第三基站基于所述第二基站发送的第一转移数据确定，其中，所述第一转移数据用于指示所述目标数据单元中传输成功的第一数据单元和/或传输失败的第二数据单元。
  12. 根据权利要求9所述的通信设备，其特征在于，在所述第一接收端和所述第二接收端均为第三远端终端的情况下，所述第一发送端和所述第二发送端均为第四基站，所述第二通信链路包括以下任一项：
    所述第三远端终端通过第一中继终端和所述第四基站相连的链路；
    所述第三远端终端通过第二中继终端和所述第四基站相连的链路；
    所述第三远端终端和所述第四基站直接相连的链路。
  13. 根据权利要求9所述的通信设备，其特征在于，在所述第一接收端 和所述第二接收端均为第四远端终端的情况下，所述第一发送端为第五基站，所述第二发送端为第六基站；
    其中，所述第六基站为所述第四远端终端进行切换后直接连接到的目标基站，或所述第六基站为所述第四远端终端进行切换或重建后通过第三中继终端连接到的目标基站；所述第六基站保存有所述第五基站发送的第二转移数据，所述第二转移数据包括所述目标数据单元。
  14. 根据权利要求9所述的通信设备，其特征在于，在所述第一接收端和所述第二接收端均为第五远端终端的情况下，所述第一发送端和所述第二发送端均为第六远端终端；所述第二通信链路包括所述第五远端终端通过所述第一中继终端和所述第六远端终端相连的链路。
  15. 根据权利要求9所述的通信设备，其特征在于，所述目标数据单元的第二接收端若确定和所述目标数据单元的第二发送端之间的第二通信链路连接成功，则向所述目标数据单元的第二发送端发送分组数据汇聚协议PDCP状态报告，所述操作包括：
    在第二通信链路连接成功的情况下，接收所述第二发送端发送的第一触发消息；
    基于所述第一触发消息，向所述第二发送端发送所述PDCP状态报告。
  16. 根据权利要求9所述的通信设备，其特征在于，所述目标数据单元的第二接收端若确定和所述目标数据单元的第二发送端之间的第二通信链路连接成功，则向所述目标数据单元的第二发送端发送分组数据汇聚协议PDCP状态报告，所述操作包括：
    在所述第二通信链路连接成功且包括第四中继终端的情况下，接收所述第四中继终端发送的第二触发消息；
    基于所述第二触发消息，向所述第二发送端发送所述PDCP状态报告。
  17. 一种分组数据汇聚协议状态报告发送装置，其特征在于，包括：
    发送模块，用于在第一通信链路中的第一接收端和第一中继终端之间的部分连接失败之后，目标数据单元的第二接收端若确定和目标数据单元的第二发送端之间的第二通信链路连接成功，则向所述目标数据单元的第二发送 端发送分组数据汇聚协议PDCP状态报告；
    其中，所述PDCP状态报告用于指示所述目标数据单元中传输成功的第一数据单元和/或传输失败的第二数据单元；
    所述第一通信链路为所述目标数据单元的第一发送端、第一中继终端和所述目标数据单元的第一接收端组成的链路；
    所述第一接收端和所述第二接收端相同或不同，所述第一发送端和所述第二发送端相同或不同。
  18. 根据权利要求17所述的分组数据汇聚协议状态报告发送装置，其特征在于，在所述第一接收端和所述第二接收端均为第一基站的情况下，所述第一发送端和所述第二发送端均为第一远端终端。
  19. 根据权利要求17所述的分组数据汇聚协议状态报告发送装置，其特征在于，在所述第一接收端为第二基站且所述第二接收端为第三基站的情况下，所述第一发送端和所述第二发送端均为第二远端终端；
    其中，所述第三基站为所述第一中继终端从所述第二基站进行切换或重建后连接到的目标基站；所述PDCP状态报告是由所述第三基站基于所述第二基站发送的第一转移数据确定，其中，所述第一转移数据用于指示所述目标数据单元中传输成功的第一数据单元和/或传输失败的第二数据单元。
  20. 根据权利要求17所述的分组数据汇聚协议状态报告发送装置，其特征在于，在所述第一接收端和所述第二接收端均为第三远端终端的情况下，所述第一发送端和所述第二发送端均为第四基站，所述第二通信链路包括以下任一项：
    所述第三远端终端通过第一中继终端和所述第四基站相连的链路；
    所述第三远端终端通过第二中继终端和所述第四基站相连的链路；
    所述第三远端终端和所述第四基站直接相连的链路。
  21. 根据权利要求17所述的分组数据汇聚协议状态报告发送装置，其特征在于，在所述第一接收端和所述第二接收端均为第四远端终端的情况下，所述第一发送端为第五基站，所述第二发送端为第六基站；
    其中，所述第六基站为所述第四远端终端进行切换后直接连接到的目标 基站，或所述第六基站为所述第四远端终端进行切换或重建后通过第三中继终端连接到的目标基站；所述第六基站保存有所述第五基站发送的第二转移数据，所述第二转移数据包括所述目标数据单元。
  22. 根据权利要求17所述的分组数据汇聚协议状态报告发送装置，其特征在于，在所述第一接收端和所述第二接收端均为第五远端终端的情况下，所述第一发送端和所述第二发送端均为第六远端终端；所述第二通信链路包括所述第五远端终端通过所述第一中继终端和所述第六远端终端相连的链路。
  23. 根据权利要求17所述的分组数据汇聚协议状态报告发送装置，其特征在于，所述发送模块包括第一接收单元和第一发送单元，其中：
    所述第一接收单元，用于在第二通信链路连接成功的情况下，接收所述第二发送端发送的第一触发消息；
    所述第一发送单元，用于基于所述第一触发消息，向所述第二发送端发送所述PDCP状态报告。
  24. 根据权利要求17所述的分组数据汇聚协议状态报告发送装置，其特征在于，所述发送模块包括第二接收单元和第二发送单元，其中：
    所述第二接收单元，用于在所述第二通信链路连接成功且包括第四中继终端的情况下，接收所述第四中继终端发送的第二触发消息；
    所述第二发送单元，用于基于所述第二触发消息，向所述第二发送端发送所述PDCP状态报告。
  25. 一种处理器可读存储介质，其特征在于，所述处理器可读存储介质存储有计算机程序，所述计算机程序用于使所述处理器执行权利要求1至8任一项所述的方法。
PCT/CN2022/107900 2021-07-28 2022-07-26 分组数据汇聚协议状态报告发送方法、设备及装置 WO2023005919A1 (zh)

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CN108024295A (zh) * 2016-11-03 2018-05-11 中兴通讯股份有限公司 中继转移方法及装置、终端、基站
CN110636562A (zh) * 2018-06-21 2019-12-31 电信科学技术研究院有限公司 一种无线回程路径的数据处理方法和设备
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