WO2023143287A1 - 数据传输方法、装置、设备及存储介质 - Google Patents

数据传输方法、装置、设备及存储介质 Download PDF

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Publication number
WO2023143287A1
WO2023143287A1 PCT/CN2023/072809 CN2023072809W WO2023143287A1 WO 2023143287 A1 WO2023143287 A1 WO 2023143287A1 CN 2023072809 W CN2023072809 W CN 2023072809W WO 2023143287 A1 WO2023143287 A1 WO 2023143287A1
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WO
WIPO (PCT)
Prior art keywords
target
base station
terminal
handover
pdu set
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
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PCT/CN2023/072809
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English (en)
French (fr)
Inventor
谌丽
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Datang Mobile Communications Equipment Co Ltd
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Datang Mobile Communications Equipment Co Ltd
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Filing date
Publication date
Application filed by Datang Mobile Communications Equipment Co Ltd filed Critical Datang Mobile Communications Equipment Co Ltd
Priority to US18/833,940 priority Critical patent/US20250159556A1/en
Priority to EP23746169.4A priority patent/EP4472283A4/en
Publication of WO2023143287A1 publication Critical patent/WO2023143287A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/02—Buffering or recovering information during reselection ; Modification of the traffic flow during hand-off
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/36—Reselection control by user or terminal equipment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/02—Buffering or recovering information during reselection ; Modification of the traffic flow during hand-off
    • H04W36/023—Buffering or recovering information during reselection
    • H04W36/0235—Buffering or recovering information during reselection by transmitting sequence numbers, e.g. SN status transfer

Definitions

  • the present disclosure relates to the technical field of communications, and in particular, to a data transmission method, device, equipment, and storage medium.
  • Extended Reality (XR) data transmission has the characteristics of large data volume and high latency requirements.
  • An XR data frame can be divided into multiple Internet Protocol (IP) data packets.
  • IP Internet Protocol
  • Embodiments of the present disclosure provide a data transmission method, device, device, and storage medium, which are used to solve the defect of low data efficiency in the prior art due to the low transmission accuracy of XR data frames, so as to ensure the transmission accuracy of XR data frames and save resource.
  • an embodiment of the present disclosure provides a data transmission method, including:
  • the transmission processing method of the target PDU set includes:
  • the transmission of all the PDUs belonging to the target PDU set is completed at the source base station, where the source base station is the base station accessed by the terminal before handover.
  • the target PDU set is downlink data
  • the target communication device is a source base station
  • the determining that the terminal is in a cell change includes:
  • the transmission at the source base station completes all the PDUs to which the target PDU set belongs, including:
  • the target PDU set is uplink data
  • the target communication device is a terminal
  • the determining that the terminal is in a cell change includes:
  • the transmission at the source base station completes all the PDUs to which the target PDU set belongs, including:
  • the PDU of the last uplink transmission among all the PDUs to which the target PDU set belongs includes a termination flag, and the termination flag is used to indicate that the PDU is the The last PDU among all the PDUs to which the target PDU set belongs.
  • the transmission processing method of the target PDU set includes:
  • the transmission of all the PDUs belonging to the target PDU set is completed at the target base station.
  • the target PDU set is downlink data
  • the target communication device is a source base station
  • the determining that the terminal is in a cell change includes:
  • the transmission at the target base station completes all the PDUs to which the target PDU set belongs, including:
  • the target PDU set is downlink data
  • the target communication device is a target base station
  • the determining that the terminal is in a cell change includes:
  • the transmission at the target base station completes all the PDUs to which the target PDU set belongs, including:
  • the target PDU set is uplink data
  • the target communication device is a terminal
  • the determining that the terminal is in a cell change includes:
  • the transmission at the target base station completes all the PDUs to which the target PDU set belongs, including:
  • the terminal After the terminal completes the handover and accesses the target base station, it sends all the PDUs to which the target PDU set belongs to the target base station.
  • the transmission processing method of the target PDU set includes:
  • the first data packet includes PDUs in the target PDU set that have not been sent to the communication peer and/or PDUs that have not been successfully sent to the communication peer.
  • the target PDU set is downlink data
  • the target communication device is a source base station
  • the determining that the terminal is in a cell change includes:
  • the source base station After the source base station sends the conditional handover configuration to the terminal, receiving a handover success message sent by the target base station;
  • the transmitting the first data packet at the target base station includes:
  • the source base station After the source base station receives the handover success message, send the first data packet to the target base station.
  • the target PDU set is downlink data
  • the target communication device is a target base station
  • the determining that the terminal is in a cell change includes:
  • the transmitting the first data packet at the target base station includes:
  • the target PDU set is downlink data
  • the target communication device is a source base station
  • the determining that the terminal is in a cell change includes:
  • the transmitting the first data packet at the target base station includes:
  • the target PDU set is downlink data
  • the target communication device is a target base station
  • the determining that the terminal is in a cell change includes:
  • the transmitting the first data packet at the target base station includes:
  • the target PDU set is uplink data
  • the target communication device is a terminal
  • the determining that the terminal is in a cell change includes:
  • the transmitting the first data packet at the target base station includes:
  • the terminal After the terminal completes the handover and accesses the target base station, the terminal sends the first data packet to the target base station.
  • the target PDU set is uplink data
  • the target communication device is a terminal
  • the determining that the terminal is in a cell change includes:
  • the transmitting the first data packet at the target base station includes:
  • the terminal After the terminal completes the handover and accesses the target base station, the terminal sends the first data packet to the target base station.
  • the transmission processing method of the target PDU set includes:
  • the second data packet is a PDU in the target PDU set that has not been sent to the communication peer and/or a PDU that has not been successfully sent to the communication peer.
  • the target PDU set is For downlink data
  • the target communication device is a source base station
  • the determining that the terminal is in a cell change includes:
  • the source base station After the source base station sends the conditional handover configuration to the terminal, receiving a handover success message sent by the target base station;
  • the discarding of the second data packet includes:
  • the target PDU set is downlink data
  • the target communication device is a source base station
  • the determining that the terminal is in a cell change includes:
  • the discarding of the second data packet includes:
  • the target PDU set is uplink data
  • the target communication device is a terminal
  • the determining that the terminal is in a cell change includes:
  • the discarding of the second data packet includes:
  • the target PDU set is uplink data
  • the target communication device is a terminal
  • the determining that the terminal is in a cell change includes:
  • the discarding of the second data packet includes:
  • the second data packet is discarded.
  • the target PDU set is uplink data
  • the target communication device is a source base station or a target base station
  • the method also includes:
  • an embodiment of the present disclosure further provides a target communication device, including:
  • the memory is used to store computer programs; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer programs in the memory and perform the following operations:
  • the transmission processing method of the target PDU set includes:
  • the transmission of all the PDUs belonging to the target PDU set is completed at the source base station, where the source base station is the base station accessed by the terminal before handover.
  • the target PDU set is downlink data, and the target communication device is a source base station;
  • the determining that the terminal is in a cell change includes:
  • the transmission at the source base station completes all the PDUs to which the target PDU set belongs, including:
  • the target PDU set is uplink data, and the target communication device is a terminal;
  • the determining that the terminal is in a cell change includes:
  • the transmission of all the PDUs to which the target PDU set belongs is completed at the source base station, including:
  • the PDU of the last uplink transmission among all the PDUs to which the target PDU set belongs includes a termination flag, and the termination flag is used to indicate that the PDU is the The last PDU among all the PDUs to which the target PDU set belongs.
  • the transmission processing method of the target PDU set includes:
  • the transmission of all the PDUs belonging to the target PDU set is completed at the target base station.
  • the target PDU set is downlink data, and the target communication device is a source base station;
  • the determining that the terminal is in a cell change includes:
  • the transmission at the target base station completes all the PDUs to which the target PDU set belongs, including:
  • the target PDU set is downlink data, and the target communication device is a target base station;
  • the determining that the terminal is in a cell change includes:
  • the transmission at the target base station completes all the PDUs to which the target PDU set belongs, including:
  • the target PDU set is uplink data, and the target communication device is a terminal;
  • the determining that the terminal is in a cell change includes:
  • the transmission at the target base station completes all the PDUs to which the target PDU set belongs, including:
  • the terminal After the terminal completes the handover and accesses the target base station, it sends all the PDUs to which the target PDU set belongs to the target base station.
  • the transmission processing method of the target PDU set includes:
  • the first data packet includes PDUs in the target PDU set that have not been sent to the communication peer and/or PDUs that have not been successfully sent to the communication peer.
  • the target PDU set is downlink data, and the target communication device is a source base station;
  • the determining that the terminal is in a cell change includes:
  • the source base station After the source base station sends the conditional handover configuration to the terminal, receiving a handover success message sent by the target base station;
  • the transmitting the first data packet at the target base station includes:
  • the source base station After the source base station receives the handover success message, send the first data packet to the target base station.
  • the target PDU set is downlink data, and the target communication device is a target base station;
  • the determining that the terminal is in a cell change includes:
  • the transmitting the first data packet at the target base station includes:
  • the target PDU set is downlink data, and the target communication device is a source base station;
  • the determining that the terminal is in a cell change includes:
  • the transmitting the first data packet at the target base station includes:
  • the target PDU set is downlink data, and the target communication device is a target base station;
  • the determining that the terminal is in a cell change includes:
  • the transmitting the first data packet at the target base station includes:
  • the target PDU set is uplink data, and the target communication device is a terminal;
  • the determining that the terminal is in a cell change includes:
  • the transmitting the first data packet at the target base station includes:
  • the terminal After the terminal completes the handover and accesses the target base station, the terminal sends the first data packet to the target base station.
  • the target PDU set is uplink data, and the target communication device is a terminal;
  • the determining that the terminal is in a cell change includes:
  • the transmitting the first data packet at the target base station includes:
  • the terminal After the terminal completes the handover and accesses the target base station, the terminal sends the first data packet to the target base station.
  • the transmission processing method of the target PDU set includes:
  • the second data packet is a PDU in the target PDU set that has not been sent to the communication peer and/or a PDU that has not been successfully sent to the communication peer.
  • the target PDU set is downlink data, and the target communication device is a source base station;
  • the determining that the terminal is in a cell change includes:
  • the source base station After the source base station sends the conditional handover configuration to the terminal, receiving a handover success message sent by the target base station;
  • the discarding of the second data packet includes:
  • the target PDU set is downlink data, and the target communication device is a source base station;
  • the determining that the terminal is in a cell change includes:
  • the discarding of the second data packet includes:
  • the target PDU set is uplink data, and the target communication device is a terminal;
  • the determining that the terminal is in a cell change includes:
  • the discarding of the second data packet includes:
  • the target PDU set is For uplink data
  • the target communication device is a terminal
  • the determining that the terminal is in a cell change includes:
  • the discarding of the second data packet includes:
  • the second data packet is discarded.
  • the target PDU set is uplink data
  • the target communication device is a source base station or a target base station
  • Said actions also include:
  • an embodiment of the present disclosure further provides a data transmission device, including:
  • the first determination module is configured to determine that there is a target PDU set that is not fully transmitted successfully when it is determined that the terminal is in a cell change; all or part of the PDUs that the incompletely transmitted target PDU set belongs to have not been sent or have not been transmitted successfully sent;
  • the second determination module is used to determine the transmission processing mode of the target PDU set.
  • 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 steps of the data transmission method.
  • the data transmission method, device, device, and storage medium provided by the embodiments of the present disclosure determine that there is a target PDU set that has not been completely successfully transmitted when the terminal is determined to be in a cell change; and then determine the transmission processing method of the target PDU set , to ensure the correct rate of target PDU set transmission and save resources.
  • FIG. 1 is a schematic diagram of data packets in XR service modeling provided by related technologies
  • Fig. 2 is a schematic diagram of mapping XR service data packets provided by related technologies into multiple 5G system air interface IP packets;
  • FIG. 3 is a schematic diagram of a routine handover process performed by a terminal provided by related technologies
  • FIG. 4 is a schematic diagram of a terminal execution condition switching process provided by related technologies
  • FIG. 5 is a schematic flowchart of a data transmission method provided by an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of a data transmission device provided by an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of a terminal provided by an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a source base station provided by an embodiment of the present disclosure.
  • Fig. 9 is a schematic structural diagram of a target base station provided by an embodiment of the present disclosure.
  • Embodiments of the present disclosure provide a data transmission method, device, device and storage medium, to ensure the accuracy of target PDU set transmission and save resources.
  • the method and the device are conceived based on the same application. Since the principle of solving problems of the method and the device is similar, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.
  • 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 terminal device involved in the embodiments of the present disclosure may be a device that provides voice and/or data connectivity to users, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem.
  • the names of the terminal equipment may be different.
  • the terminal equipment may be called user equipment (User Equipment, UE).
  • a wireless terminal device can communicate with one or more core networks (Core Network, CN) via a radio access network (Radio Access Network, RAN), and the wireless terminal device can be a mobile terminal device, 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 device 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 may also be called system, subscriber unit, subscriber station, mobile station, mobile station, remote station, access point , remote terminal, access Terminal equipment (access terminal), user terminal equipment (user terminal), user agent (user agent), and user device (user device) are not limited in the embodiments of the present disclosure.
  • 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 embodiment 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), the 5G base station (gNB) in the 5G network architecture (next generation system), or the 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, and the centralized unit and the distributed
  • Extended Reality eXtened Reality, XR
  • Cloud Game Cloud Game
  • XR Extended Reality
  • CG Cloud Game
  • XR Extended Reality
  • CG Cloud Game
  • XR Extended Reality
  • CG Cloud Game
  • XR is an umbrella term for different types of reality, referring to all combined real and virtual environments and people generated by computer technology and equipment machine interaction. It includes representative forms such as augmented reality (Augmented Reality, AR), mixed reality (Mixed Reality, MR) and virtual reality (Virtual Reality, VR).
  • Figure 1 is a schematic diagram of data packets in XR service modeling provided by related technologies; as shown in Figure 1, XR services are modeled by frame-level data packets in the 5G system;
  • FIG. 2 is a schematic diagram of the mapping of XR service data packets provided by related technologies into multiple 5G system air interface IP packets.
  • each data packet corresponds to an XR frame (also called a data frame), and the same data frame can be Divided into multiple IP packets, the data frame corresponds to a group of packet data unit PDU set, and each IP packet divided by the same data frame corresponds to a packet data unit PDU.
  • XR contains a variety of data frames (PDU set), each frame has its transmission characteristics and transmission requirements, for example, I-frame (Intra-coded picture) is intra-frame coding, which can represent a complete picture, P-frame (Predicted picture ) is inter-frame coding, which only needs to carry different information from the previous frame. Therefore, I-frame has a large amount of data and requires high reliability; P-frame has a small amount of data and has lower reliability requirements than I-frame.
  • I-frame Intra-coded picture
  • P-frame Predicted picture
  • I-frame has a large amount of data and requires high reliability
  • P-frame has a small amount of data and has lower reliability requirements than I-frame.
  • the service feature requirements are for data frames (PDU set), for example, for scenes and mixed video streams, the service feature requirements are: cycle 60fps (frame per second, frame per second); data rate 10Mbps or 20Mbps; PDB ( packet delay budget, packet delay budget) 30ms (mandatory) or 10ms or 15ms or 60ms (optional).
  • a data frame (PDU set) can be divided into multiple IP packets (PDUs), and air interface transmission is carried out with IP packets (PDUs) as the basic unit.
  • IP packets (PDUs) corresponding to a data frame (PDU set)
  • the data frame (PDU set) may not be decoded correctly.
  • the data flow of PDU set is large, and it needs to consume more resources to transmit the subsequent IP packets (PDU) correctly.
  • it may cause the transmission delay of subsequent data frames (PDU set) of the same flow, or other flow data frames (PDU set). set) transmission delay. It is not conducive to meeting the transmission delay requirements of the XR service.
  • FIG. 3 is a schematic diagram of a conventional handover process provided by a related technology.
  • the terminal-related process is mainly in the first step in Figure 3: handover measurement
  • the source cell initiates handover, For example, through radio resource control (Radio Resource Control, RRC synchronous reconfiguration command) is initiated
  • step 8 in Fig. 3 switching to the target cell.
  • the source base station sends an RRC reconfiguration message to the terminal, and the RRC reconfiguration message includes target cell information and information about the terminal accessing the target cell including random access parameters.
  • Step 8 in FIG. 3 includes a random access process between the terminal and the target base station and a process in which the terminal sends the RRC reconfiguration complete message corresponding to the RRC reconfiguration message from the source base station to the target base station to the target base station.
  • the terminal After the source cell receives the RRC synchronous reconfiguration command and determines to switch to the target cell (step 6 in Figure 3), the terminal disconnects from the source cell and performs packet data convergence protocol (Packet Data Convergence Protocol, PDCP) reconstruction.
  • Packet Data Convergence Protocol Packet Data Convergence Protocol
  • DRB Data Radio Bearer
  • RLC UM Radio Link Control Unacknowledgement Mode
  • the PDCP PDUs of the data packets are sorted, and the parsed PDCP SDUs are submitted to the upper layer in the ascending order of the corresponding count values; for the uplink data transmission of the terminal, if the data packets (that is, the PDCP service data unit) that have not been submitted to the lower layer (that is, the RLC layer) (Service Data Unit, SDU) or a data packet constructed as a PDCP PDU that has not been delivered to the lower layer), will be sent in the target cell, for the data packet that has been delivered to the lower layer (that is, the data packet that has been assembled into a PDCP PDU and delivered to the lower layer ), no matter whether the transmission is successful in the source cell, it will not be retransmitted in the target cell.
  • the data packets that is, the PDCP service data unit
  • the RLC layer Service Data Unit, SDU
  • SDU Service Data Unit
  • FIG 4 is a schematic diagram of the terminal execution conditional handover process provided by the related technology.
  • Conditional Handover (Conditional Handover, CHO) is a handover optimization method.
  • a handover command from the source base station is received.
  • the source base station does not know that the terminal has completed the handover until it receives a handover success message (HANDOVER SUCCESS message) from the target base station.
  • Other processes, including the user plane process, are the same as traditional handover.
  • the existing handover process has two defects for the transmission of XR data frames: (1) During the handover process, different IP packets belonging to the same data frame may be partly transmitted in the source base station and partly transmitted in the target base station, but between the source base station and the target base station The transmission has a switching interruption delay, which leads to an increase in the transmission delay of the data frame, which may not meet the low delay requirements of the XR data frame transmission; (2) RLC UM allows packet loss. Different IP packets, if some IP packets are lost in the source cell, even if the subsequent IP packets are successfully transmitted in the target cell, the data frame cannot be parsed correctly. This causes a waste of air interface resources in the target cell.
  • various embodiments of the present disclosure provide a data transmission method, device, device, and storage medium.
  • Fig. 5 is a schematic flowchart of a data transmission method provided by an embodiment of the present disclosure. As shown in Fig. 5, the subject of execution of the method is a target communication device, and the method may include the following steps 500 to 510:
  • Step 500 in the case of determining that the terminal is in a cell change, determine that there is a target PDU set that has not been fully transmitted successfully; all or part of the PDUs that the target PDU set that has not fully transmitted successfully belong to have not been sent or have not been successfully sent;
  • Step 510 determine the transmission processing mode of the target PDU set.
  • the target PDU set can be an XR data frame
  • the XR data frame can be decomposed into a set of packet data units PDU set, and the IP packet to which the XR data frame belongs corresponds to the packet data unit PDU in the wireless network. That is, the XR data frame corresponds to the PDU set, and the IP packet corresponds to the PDU.
  • the terminal when the terminal is under a cell change, it is easy to perform switching before the transmission of the PDU set is completed, so that all or part of the PDUs have not been sent or have not been successfully sent; therefore, when it is determined that the terminal is in a cell change, Determine that there is a target PDU set that has not been fully transmitted successfully as above;
  • the transmission processing method of the target PDU set can be determined, so that the target PDU set can perform transmission processing based on an appropriate transmission processing method to ensure the transmission of the target PDU set correct rate;
  • the transmission processing method of the target PDU set may be determined based on the transmission performance requirements of the target PDU set;
  • the transmission performance requirement of the target PDU set is low latency, it can be determined that the transmission processing method of the target PDU set can guarantee low latency;
  • the transmission performance requirement of the target PDU set is high reliability, it can be determined that the transmission processing method of the target PDU set can ensure high reliability;
  • the transmission processing method can ensure that the transmission performance requirements of the target PDU set are met, improve the correct rate of target PDU set transmission, and thus save transmission resources.
  • the terminal when the terminal is determined to be in a cell change, it is determined that there is a target PDU set that has not been completely successfully transmitted; and then the transmission processing method of the target PDU set is determined to ensure the correct rate of target PDU set transmission ,save resources.
  • the transmission processing method of the target PDU set includes:
  • determining the transmission processing method of the target PDU set includes: transmitting all PDUs belonging to the target PDU set at the source base station, where the source base station is the base station accessed by the terminal before handover.
  • determining the transmission processing method of the target PDU set includes: successfully transmitting all PDUs belonging to the target PDU set at the source base station.
  • determining the transmission processing manner of the target PDU set includes: transmitting all PDUs belonging to the target PDU set at the source base station.
  • all the PDUs belonging to the target PDU set that have been transmitted at the source base station may refer to all the PDUs that belong to the target PDU set that have been successfully transmitted at the source base station.
  • completing the transmission of all the PDUs belonging to the target PDU set at the source base station may refer to successfully sending the target PDU set before performing the handover of the terminal.
  • completing the transmission of all the PDUs belonging to the target PDU set at the source base station may refer to that all the PDUs belonging to the target PDU set are successfully sent before the terminal performs handover.
  • the method further includes: executing the transmission processing method of the target PDU set, that is, the method further includes: completing transmission at the source base station of all PDUs belonging to the target PDU set.
  • the transmission performance requirement of the target PDU set is high reliability and/or low delay
  • in order to ensure that the PDUs in the target PDU set will not cause transmission failure or transmission terminal due to the switching of the terminal Or in order to ensure that PDUs belonging to the same PDU set will not be lost due to the transmission of PDUs belonging to the same PDU set by different base stations after the terminal performs handover, it is possible to determine that the terminal is in the case of a cell change without performing the terminal handover process first, but first After all the PDUs belonging to the target PDU set are successfully transmitted, and then execute the terminal switching process, it can also guarantee low latency.
  • the PDUs belonging to the same target PDU set can be transmitted in the same base station to ensure the high reliability transmission of the target PDU set, effectively improving the correct rate of successful transmission.
  • the target PDU set is downlink data
  • the target communication device is the source base station
  • Determine that the terminal is in cell change including:
  • the sender of the downlink data is the source base station; in order to transmit all the PDUs belonging to the target PDU set at the source base station, the source base station can determine that the terminal is in a cell change based on the terminal measurement report, That is, when it is necessary to send a switching command to the terminal, all the PDUs belonging to the target PDU set can be sent to the terminal first, and after all the PDUs of the target PDU set are successfully sent, the switching command is sent to the terminal to instruct the terminal to switch.
  • the sender of the downlink data is the source base station; taking the target PDU set as an XR data frame as an example, the source base station can receive the terminal measurement report and determine the required data based on the terminal measurement report.
  • all PDUs belonging to the same XR data frame (which may be called a PDU group) that have arrived at the source base station can be sent to the terminal first, and then a handover command can be sent to the terminal.
  • the PDU can be equivalent to the SDAP SDU at the RAN side.
  • the sender of the downlink data is the source base station; the terminal side can perform measurement reporting according to the measurement configuration of the source base station; the source base station can receive the terminal measurement report, and based on the terminal
  • the measurement report decides to initiate the terminal handover process, all the PDUs belonging to the same XR data frame that have arrived at the source base station are sent to the terminal, and then the handover command is sent to the terminal.
  • the terminal After receiving the handover command from the source base station, the terminal can execute the handover process.
  • the The terminal switching process is performed after the transmission of all data frames to be transmitted.
  • the reliability of data frame transmission can be guaranteed to the greatest extent.
  • the target PDU set is uplink data, and the target communication device is a terminal;
  • Determine that the terminal is in cell change including:
  • the sender of the uplink data is a terminal; in order to realize the transmission of all PDUs belonging to the target PDU set at the source base station, the terminal can receive the handover command sent by the source base station, and based on the handover The command determines that it is necessary to disconnect from the source base station.
  • the sender of the uplink data is a terminal.
  • the sender of the uplink data is a terminal; taking the target PDU set as an XR data frame as an example, after the terminal receives the switching command sent by the source base station based on the terminal measurement report, if it belongs to the same A PDU of an XR data frame (called a PDU group) has started to be transmitted on the air interface. After the terminal can send all the PDUs of the PDU group to the source base station, it can perform a handover process, disconnect from the source base station, and access the target base station.
  • a PDU group A PDU of an XR data frame
  • the PDU can be equivalent to the SDAP SDU at the RAN side.
  • the terminal handover process is performed after completing the transmission of all data frames to be transmitted first, so that the maximum Ensure the reliability of data frame transmission to a certain extent.
  • the PDU of the last uplink transmission among all the PDUs to which the target PDU set belongs includes a termination flag, and the termination flag is used to indicate that the PDU is the last PDU among all the PDUs to which the target PDU set belongs.
  • the terminal handover process is performed after completing the transmission of all target PDU sets to be transmitted first, in order to ensure that the communication peer can be transmitted in time after all the target PDU sets to be transmitted are completed.
  • the termination flag can be carried in the last transmitted PDU belonging to the target PDU set to inform the communication peer: as of the PDU where the termination flag is located, all the PDUs belonging to the target PDU set to be transmitted have been sent .
  • the terminal handover process is performed after completing the transmission of all target PDU sets to be transmitted first, in order to ensure that the source base station can start in time after all the target PDU sets to be transmitted are completed.
  • the terminal switching process so the terminal can carry the termination flag in the last uplink transmission PDU belonging to the target PDU set to inform the source base station that all the PDUs belonging to the target PDU set to be transmitted have been sent as of the PDU where the termination flag is located .
  • the sender of the uplink data is a terminal; the terminal side can perform measurement reporting according to the measurement configuration of the source base station; the source base station can receive the terminal measurement report, and based on the terminal measurement If the report decides to initiate the terminal handover process, it will send a handover command to the terminal; after the terminal receives the handover command from the source base station, if the PDU belonging to the same XR data frame has already started to be transmitted on the air interface, it will not execute the handover process temporarily, but first Send all the PDUs of the PDU group to the source base station, and disconnect from the source base station to access the target base station after all the XR data frames to be sent on the terminal side are successfully sent;
  • the terminal may carry an End Marker in the last uplink transmission sent to the source base station, and the End Marker is carried in the PDCP PDU or SDAP PDU.
  • the source base station will also continue to receive the uplink transmission sent by the terminal after sending the switching command to the terminal, and disconnect the transmission with the terminal after determining that the uplink data transmission of the terminal is terminated;
  • the condition for the source base station to determine that the terminal's uplink data transmission is terminated may be: after sending the handover command, the terminal's uplink data is received and the "uplink data transmission termination timer" is started or restarted.
  • the uplink transmission of the terminal is terminated, and the length of the timer is predefined or configured by the core network according to the service characteristics; or, the source base station receives the "handover success message" sent by the target base station to the source base station; or, the terminal sends In the uplink transmission of End Marker, which is carried in PDCP PDU or SDAP PDU.
  • the target base station sends a "handover success message" to the source base station.
  • the base station can pre-configure for the terminal the DRB ID or QoS flow ID that can perform the transmission of the PDU group at the source base station, thereby delaying the handover process.
  • the transmission processing method of the target PDU set includes:
  • determining the transmission processing method of the target PDU set includes: completing the transmission of all PDUs belonging to the target PDU set at the target base station.
  • determining the transmission processing manner of the target PDU set includes: transmitting all PDUs belonging to the target PDU set at the target base station.
  • determining the transmission processing method of the target PDU set includes: successfully transmitting all PDUs belonging to the target PDU set at the target base station.
  • all the PDUs belonging to the target PDU set that are successfully transmitted at the target base station may refer to all the PDUs that belong to the target PDU set that are successfully transmitted at the target base station.
  • transmitting at the target base station all the PDUs to which the target PDU set belongs may refer to: when it is determined that the terminal is to perform handover, the target PDU set can be sent and completed; After this action, or after the terminal performs handover, all PDUs belonging to the target PDU set are sent.
  • the method further includes: a transmission processing method of the target PDU set; that is, the method further includes: completing the transmission at the target base station of all the PDUs to which the target PDU set belongs.
  • the transmission performance requirement of the target PDU set is high reliability, in order to ensure that the PDUs in the target PDU set will not cause transmission failures or transmission terminals due to terminal execution switching, or in order to ensure that they will not be transmitted due to After the terminal performs handover, the PDUs belonging to the same data frame are transmitted by different base stations and some PDUs are lost, etc., when it is determined that the terminal is in a cell change, and when the terminal is determined to perform handover, the target PDU can be transmitted at the target base station All PDUs to which the set belongs;
  • the PDUs belonging to the same target PDU set (such as XR number According to frame) PDUs are transmitted in the same base station to ensure the high reliability transmission of the target PDU set, effectively improving the correct rate of successful transmission.
  • the target PDU set is downlink data
  • the target communication device is the source base station
  • Determine that the terminal is in cell change including:
  • the sender of the downlink data is the source base station; in order to transmit all the PDUs belonging to the target PDU set at the target base station, the source base station can determine that the terminal is in a cell change based on the terminal measurement report , that is, when it is necessary to send a switching command to the terminal, send all the PDUs belonging to the target PDU set to the target base station, so that the target base station can send all the PDUs belonging to the target PDU set to the terminal after receiving all the PDUs belonging to the target PDU set , to complete the downlink transmission.
  • the sender of the downlink data is the source base station; taking the target PDU set as an XR data frame as an example, the source base station can receive the terminal measurement report and determine the required data based on the terminal measurement report.
  • the source base station can forward all the PDUs in the PDU group to the target base station (which will contain the PDU group) SDAP SDU forwarded to the target base station), so that the target base station sends all the PDUs of the PDU group to the terminal.
  • the target PDU set is downlink data
  • the target communication device is the target base station
  • Determine that the terminal is in cell change including:
  • the sender of the downlink data is the source base station; in order to transmit all the PDUs belonging to the target PDU set at the target base station, the source base station can determine that the terminal is in a cell change based on the terminal measurement report In the case of , send a handover request to the target base station.
  • the target base station After receiving the handover request, the target base station can send a handover request confirmation message to the source base station, triggering the source base station to send a handover command to the terminal; then the source base station can send the target PDU set to the target base station.
  • the target base station can receive all the PDUs sent by the source base station, and after the terminal completes the handover based on the handover command, send all the PDUs belonging to the target PDU set to the terminal to complete the downlink transmission of the target PDU set.
  • the sender of the downlink data is the source base station; taking the target PDU set as an XR data frame as an example, the source base station can determine that the terminal is in a cell change based on the terminal measurement report In this case, send a handover request to the target base station, and after receiving the handover request, the target base station can send handover request confirmation information to the source base station, triggering the source base station to send a handover command to the terminal; if the PDUs belonging to the same data frame (called a PDU group ) are not all sent to the terminal, then the source base station can forward all the PDUs of the PDU group to the target base station (forwarding the SDAP SDU containing the PDU to the target base station), and the target base station can receive all the PDUs sent by the source base station, and After the terminal completes the handover, it sends all the PDUs belonging to the target PDU set to the terminal to complete the downlink transmission.
  • a PDU group the same data frame
  • the source base station can forward
  • the target PDU set is uplink data, and the target communication device is a terminal;
  • Determine that the terminal is in cell change including:
  • the terminal After the terminal completes the handover and accesses the target base station, it sends all the PDUs to which the target PDU set belongs to the target base station.
  • the sender of the uplink data is a terminal; in order to realize the transmission of all PDUs belonging to the target PDU set at the target base station, the terminal may perform switching after receiving the switching command sent by the source base station , if there are PDUs belonging to the same target PDU set (called a PDU group) that are not all sent to the source base station, after the handover is completed, the All PDUs in the PDU group are sent to the target base station.
  • a PDU group PDU group
  • the sender of the uplink data is a terminal; the source base station sends a handover command to the terminal after determining that the terminal can be handed over to the target base station, and executes the handover process.
  • the terminal After the terminal receives the handover command from the source base station, if all the PDUs belonging to the same target PDU set (called a PDU group) are not sent to the source base station, it can send all the PDUs in the PDU group after the handover is completed. to the target base station.
  • a PDU group the target base station.
  • the target base station may perform a handover process with the terminal, and receive uplink data sent by the terminal after the handover is completed.
  • the base station can pre-configure the DRB ID or QoS flow ID that can perform the PDU retransmission operation for the terminal.
  • the transmission processing method of the target PDU set includes:
  • the first data packet is transmitted at the target base station; the first data packet includes PDUs in the target PDU set that have not been sent to the communication peer and/or PDUs that have not been successfully sent to the communication peer.
  • the communication peer of the source base station is a terminal
  • the communication peer of the target base station is a terminal
  • the communication peer of the terminal before the handover is the source base station.
  • the PDUs in the target PDU set that are not sent to the communication peer and/or the PDUs that are not successfully sent to the communication peer may refer to: before the terminal is switched, the PDUs in the target PDU set that are not sent to the communication peer And/or PDUs that were not successfully sent to the communication peer.
  • the method further includes: executing the transmission processing method of the target PDU set, that is, the method further includes: transmitting the first data packet at the target base station; the first data packet includes the target PDU set not sent to the communication peer PDUs and/or PDUs that were not successfully sent to the communication peer.
  • determining the transmission processing manner of the target PDU set includes: transmitting the first data packet at the target base station;
  • the first data packet may include any one or more of the following:
  • the first data packet can be transmitted at the target base station to ensure the accuracy of the first data packet transmission.
  • the sending end can retransmit the PDU in the target base station; the correct rate of the first data packet transmission is improved, and since there is no need to retransmit all PDU, saving resources.
  • the target PDU set is downlink data
  • the target communication device is the source base station
  • Determine that the terminal is in cell change including:
  • the source base station After the source base station sends the conditional handover configuration to the terminal, receiving a handover success message sent by the target base station;
  • Transmitting the first data packet at the target base station including:
  • the source base station After the source base station receives the handover success message, it sends the first data packet to the target base station.
  • the sending end of the downlink data is the source base station; in order to realize the transmission of the first data packet at the target base station, the source base station may receive the target base station after sending the conditional switching configuration to the terminal.
  • the first data packet can be sent to the target base station, so that the target base station can send the first data packet to the terminal after receiving the first data packet, thereby ensuring that the target PDU All PDUs in the set were sent successfully.
  • the sender of the downlink data is the source base station; after the source base station receives the handover success message sent by the target base station (conditional cell change): if it is determined that the PDU of a PDU group does not All are sent to the terminal, and some PDUs are not successfully transmitted (the basis for judging is that the base station has not received the HARQ ARQ feedback from the terminal after sending the MAC PDU containing the PDU to the terminal), then the source base station will include the above 2 types of PDUs that have not been successfully transmitted
  • the SDAP SDU is forwarded to the target base station, and the target base station sends it to the terminal.
  • the target PDU set is downlink data
  • the target communication device is the target base station
  • Determine that the terminal is in cell change including:
  • Transmitting the first data packet at the target base station including:
  • the sender of the downlink data is the source base station; in order to realize the transmission of the first data packet at the target base station, the target base station can send a handover message to the source base station after the terminal meets the handover condition and the handover is successful. Success message, the source base station can determine that the terminal is in the cell change after receiving the handover success message sent by the target base station, then it can send the first data packet to the target base station, and the target base station can send the second data packet to the target base station after receiving the first data packet. A data packet is sent to the terminal, thereby ensuring that all PDUs in the target PDU set are successfully sent.
  • the sender of the downlink data is the source base station; taking the target PDU set as an XR data frame as an example, the source base station can send the target cell configuration and switching conditions to the terminal, and the terminal receives Conditional handover configuration of the source base station, including target cell configuration and conditional handover trigger conditions; the terminal can initiate a handover process to the target base station after satisfying the conditional handover trigger conditions, and the target base station sends a handover message to the source base station after determining that the terminal handover is complete.
  • the source base station can determine that the terminal is in a cell change after receiving the handover success message sent by the target base station, and among all the data to be sent by the source base station, if not all PDUs of a PDU group are sent to the terminal, and some If the PDU is not successfully transmitted (the basis for judging is that the base station has not received the HARQ ARQ feedback from the terminal after sending the MAC PDU containing the PDU to the terminal), the source base station will contain the SDAP SDU (first data packet) to the target base station, and after receiving the first data packet, the target base station may send the first data packet to the terminal.
  • SDAP SDU first data packet
  • the target PDU set is downlink data
  • the target communication device is the source base station
  • Determine that the terminal is in cell change including:
  • Transmitting the first data packet at the target base station including:
  • the sending end of the downlink data is the source base station; in order to realize the transmission of the first data packet at the target base station, the source base station can determine the situation of sending the handover command to the terminal based on the terminal measurement report Next, if it is determined that the terminal is in a cell change, the first data packet can be sent to the target base station, so that after the target base station receives the first data packet, it sends the first data packet to the terminal, thereby ensuring that all PDUs in the target PDU set are was sent successfully.
  • the sender of the downlink data is the source base station; the source base station may determine to send a handover command to the terminal based on the terminal measurement report (regular cell change): if a PDU is determined If all the PDUs in the group are not sent to the terminal, and some PDUs are not transmitted successfully (the basis for judging is that the base station has not received the HARQ ARQ feedback from the terminal after sending the MAC PDU containing the PDU to the terminal), the source base station will include the above 2 types of unavailable The SDAP SDU of the successfully transmitted PDU is forwarded to the target base station, and the target base station sends it to the terminal.
  • the terminal measurement report regular cell change
  • the target PDU set is downlink data
  • the target communication device is the target base station
  • Determine that the terminal is in cell change including:
  • Transmitting the first data packet at the target base station including:
  • the first data packet is sent to the terminal.
  • the sending end of the downlink data is the source base station; in order to realize the transmission of the first data packet at the target base station, the source base station can determine the situation of sending the handover command to the terminal based on the terminal measurement report Next, if it is determined that the terminal is in a cell change, the source base station can send the first data packet to the target base station, and after the target base station receives the first data packet, it can send the first data packet to the terminal, thereby ensuring that all PDUs in the target PDU set were successfully sent.
  • the sender of the downlink data is the source base station; taking the target PDU set as an XR data frame as an example, the terminal side can Configure and perform measurement reporting; the source base station can determine that the terminal is in a cell change when it receives the terminal measurement report and decides to initiate the terminal handover process based on the terminal measurement report, that is, when it determines to send a handover command to the terminal, and all pending transmissions of the source base station
  • the source base station Forward the SDAP SDU (first data packet) containing the above two PDUs that have not been successfully transmitted to the target base station, and the target base station can receive the first data packet.
  • the target base station can send the first The packet is sent to the terminal.
  • the terminal can implement correct parsing of the target PDU set based on the first data packet and the PDU received from the source base station before handover.
  • the target PDU set is uplink data, and the target communication device is a terminal;
  • Determine that the terminal is in cell change including:
  • Transmitting the first data packet at the target base station including:
  • the terminal After the terminal completes the handover and accesses the target base station, it sends the first data packet to the target base station.
  • the sender of the uplink data is a terminal; in order to realize the transmission of the first data packet at the target base station, the terminal may perform the handover after receiving the handover command sent by the source base station, if there is If all the PDUs in a PDU group are not sent to the source base station, and part of the PDUs are not transmitted successfully (the judgment is based on the fact that the terminal has not received the HARQ ARQ feedback from the base station after sending the MAC PDU containing the PDU to the base station), the terminal is completing After the handover, the SDAP SDU containing the above-mentioned 2 types of PDUs (first data packets) that have not been successfully transmitted is resent to the target base station.
  • the sender of the uplink data is a terminal; the source base station sends a handover command to the terminal after determining that the terminal can be handed over to the target base station, and executes the handover process.
  • the terminal After the terminal receives the handover command from the source base station, if the PDUs in a PDU group are not all and some PDUs are not successfully transmitted (the basis for judging is that the terminal has not received the HARQ ARQ feedback from the base station after sending the MAC PDU containing the PDU to the base station), then after the terminal completes the handover, it will contain the PDUs that did not transmit successfully.
  • the SDAP SDU of the PDU is resent to the target base station.
  • the target base station may perform a handover process with the terminal, and after the handover is completed, receive the first data packet sent by the terminal.
  • the base station can pre-configure the DRB ID or QoS flow ID that can perform the PDU retransmission operation for the terminal.
  • the target PDU set is uplink data, and the target communication device is a terminal;
  • Determine that the terminal is in cell change including:
  • Transmitting the first data packet at the target base station including:
  • the terminal After the terminal completes the handover and accesses the target base station, it sends the first data packet to the target base station.
  • the sender of the uplink data is a terminal; in order to realize the transmission of the first data packet at the target base station, the terminal may determine that the terminal is in a conditional handover scenario based on the target cell configuration and handover conditions, When accessing the target base station under the condition of meeting the handover conditions, if there is a PDU group whose PDUs are not all sent to the source base station, and some PDUs are not transmitted successfully (judgment basis is that after the terminal sends the MAC PDU containing the PDU to the base station, it does not receive In the case of HARQ ARQ feedback to the base station), the terminal resends the SDAP SDU containing the PDU (first data packet) of the above-mentioned 2 types that have not been successfully transmitted to the target base station after the handover is completed.
  • the sender of the uplink data is a terminal; taking the target PDU set as an XR data frame as an example, the source base station can send the target cell configuration and handover conditions to the terminal, and the terminal receives the source The conditional handover configuration of the base station, including the target cell configuration and the trigger condition of the conditional handover; the terminal can initiate the handover process to the target base station after satisfying the trigger condition of the conditional handover, if all the PDUs of a PDU group are not sent to the source base station, and some If the PDU is not successfully transmitted (the basis for judging is that the terminal does not receive the HARQ ARQ feedback from the base station after sending the MAC PDU containing the PDU to the base station), the terminal will resend the SDAP SDU containing the PDU that has not been successfully transmitted to the target base station.
  • the target base station may perform a handover process with the terminal, and after the handover is completed, receive the first data packet sent by the terminal.
  • the base station can pre-configure the DRB ID or QoS flow ID that can perform the PDU retransmission operation for the terminal.
  • the transmission processing method of the target PDU set includes:
  • the second data packet is a PDU in the target PDU set that has not been sent to the communication peer and/or a PDU that has not been successfully sent to the communication peer.
  • the transmission processing method of the target PDU set can be determined, including: discarding the second data packet; wherein, the second data packet is a PDU in the target PDU set that has not been sent to the communication peer and/or has not been successfully sent to the communication peer end of the PDU.
  • the first data packet may include any one or more of the following:
  • the method further includes: executing the transmission processing method of the target PDU set, that is, the method further includes: discarding the second data packet; the second data packet is a PDU in the target PDU set that is not sent to the communication peer and /or PDUs that were not successfully sent to the communication peer.
  • the sending end can discard the remaining PDUs and/or erroneous PDUs, and no longer continue the transmission, nor Then repeat the transmission of the wrong PDU.
  • air interface resource overhead can be saved when some PDUs are discarded.
  • the embodiments of the present disclosure are applicable to services with high delay requirements, and can give up unnecessary air interface data transmission when it is determined that the XR data frame cannot be successfully transmitted, so as to save air interface resources.
  • the target PDU set is downlink data
  • the target communication device is the source base station
  • Determine that the terminal is in cell change including:
  • the source base station After the source base station sends the conditional handover configuration to the terminal, receiving a handover success message sent by the target base station;
  • Drop the second packet including:
  • the second data packet is discarded.
  • the sender of the downlink data is the source base station; before discarding the second data packet, the target base station can send a handover success message to the source base station after the terminal meets the handover condition and the handover is successful,
  • the source base station may determine that the terminal is in a cell change after receiving the handover success message sent by the target base station, and may discard the second data packet and not forward it to the target base station.
  • the embodiments of the present disclosure are applicable to services with high delay requirements, and can give up unnecessary air interface data transmission when it is determined that the XR data frame cannot be successfully transmitted, so as to save air interface resources.
  • the sender of the downlink data is the source base station; taking the target PDU set as an XR data frame as an example, the source base station can send the target cell configuration and switching conditions to the terminal, and the terminal receives Conditional handover configuration of the source base station, including target cell configuration and conditional handover trigger conditions; the terminal can initiate a handover process to the target base station after satisfying the conditional handover trigger conditions, and the target base station sends a handover message to the source base station after determining that the terminal handover is complete.
  • the source base station can determine that the terminal is in a cell change after receiving the handover success message sent by the target base station, and among all the data to be sent by the source base station, if not all PDUs of a PDU group are sent to the terminal, and some If the PDU is not transmitted successfully (the basis for judging is that the base station does not receive the HARQ ARQ feedback from the terminal after sending the MAC PDU containing the PDU to the terminal), the source base station discards other PDUs (ie, the second data packet) of the PDU group, and does not forwarded to the target base station.
  • the target PDU set is downlink data
  • the target communication device is the source base station
  • Determine that the terminal is in cell change including:
  • Drop the second packet including:
  • the second data packet is discarded.
  • the sender of the downlink data is the source base station; before discarding the second data packet, the source base station may determine that the handover command is sent to the terminal based on the terminal measurement report. If the terminal is in a cell change, the second data packet may be discarded.
  • the sender of the downlink data is the source base station; the source base station may determine to send a handover command to the terminal based on the terminal measurement report (regular cell change): if a PDU is determined If all the PDUs in the group are not sent to the terminal, and some PDUs are not transmitted successfully (the basis for judging is that the base station has not received the HARQ ARQ feedback from the terminal after sending the MAC PDU containing the PDU to the terminal), the source base station will include the above 2 types of unavailable Successfully transmitted PDUs are discarded and not forwarded to the target base station.
  • the terminal measurement report regular cell change
  • the embodiments of the present disclosure are applicable to services with high delay requirements, and can give up unnecessary air interface data transmission when it is determined that the XR data frame cannot be successfully transmitted, so as to save air interface resources.
  • the target PDU set is uplink data, and the target communication device is a terminal;
  • Determine that the terminal is in cell change including:
  • Drop the second packet including:
  • the second data packet After receiving the switching command, the second data packet is discarded.
  • the sender of the uplink data is a terminal; in order to realize the transmission of the first data packet at the target base station, the terminal may perform the handover after receiving the handover command sent by the source base station, if there is If all the PDUs in a PDU group are not sent to the source base station, and part of the PDUs are not transmitted successfully (the judgment is based on the fact that the terminal does not receive the HARQ ARQ feedback from the base station after sending the MAC PDU containing the PDU to the base station), the terminal initiates During handover, other PDUs in the PDU group are discarded and not sent to the target base station.
  • the sender of the uplink data is a terminal; the source base station sends a handover command to the terminal after determining that the terminal can be handed over to the target base station, and executes the handover process.
  • the terminal After the terminal receives the switching command from the source base station, if not all the PDUs in a PDU group are sent to the source base station, and some PDUs are not successfully transmitted (judging based on the fact that the terminal sends After the MAC PDU containing the PDU, no HARQ ARQ feedback from the base station is received), the terminal discards other PDUs in the PDU group and does not send them to the target base station when initiating handover.
  • the base station can pre-configure the DRB ID or QoS flow ID that can perform the PDU discarding operation for the terminal.
  • the target PDU set is uplink data, and the target communication device is a terminal;
  • Determine that the terminal is in cell change including:
  • Drop the second packet including:
  • the second data packet is discarded.
  • the sender of the uplink data is a terminal; in order to realize the transmission of the first data packet at the target base station, the terminal may determine that the terminal is in a conditional handover scenario based on the target cell configuration and handover conditions, When accessing the target base station under the condition of meeting the handover conditions, if there is a PDU group whose PDUs are not all sent to the source base station, and some PDUs are not transmitted successfully (judgment basis is that after the terminal sends the MAC PDU containing the PDU to the base station, it does not receive In the case of HARQ ARQ feedback to the base station), the terminal discards other PDUs in the PDU group and does not send them to the target base station when initiating a handover.
  • the sender of the uplink data is a terminal; taking the target PDU set as an XR data frame as an example, the source base station can send the target cell configuration and switching conditions to the terminal, and the terminal receives the source The conditional handover configuration of the base station, including the target cell configuration and the trigger condition of the conditional handover; the terminal can initiate the handover process to the target base station after satisfying the trigger condition of the conditional handover, if all the PDUs of a PDU group are not sent to the source base station, and some If the PDU is not transmitted successfully (judging based on that the terminal has not received the HARQ ARQ feedback from the base station after sending the MAC PDU containing the PDU to the base station), the terminal discards other PDUs in the PDU group and does not send them to the target when initiating a handover base station.
  • the base station can pre-configure the DRB ID or QoS flow ID that can perform the PDU discarding operation for the terminal.
  • the target PDU set is uplink data
  • the target communication device is the source base station or the target base station stand
  • Methods also include:
  • the source base station or the target base station can indicate that the target PDU set can be retransmitted through the identification of the target PDU set (such as DRB ID or QoS flow ID) in advance;
  • the source base station or the target base station can indicate in advance that the target PDU set can be discarded through the identification (DRB ID or QoS flow ID) of the target PDU set.
  • the terminal when the terminal is determined to be in a cell change, it is determined that there is a target PDU set that has not been completely successfully transmitted; and then the transmission processing method of the target PDU set is determined to ensure the correct rate of target PDU set transmission ,save resources.
  • the data transmission method provided by the embodiments of the present disclosure may be executed by a data transmission device.
  • the data transmission device provided in the embodiments of the present disclosure is described by taking the data transmission method performed by the data transmission device as an example.
  • Fig. 6 is a schematic structural diagram of a data transmission device provided by an embodiment of the present disclosure. As shown in Fig. 6, the data transmission device may include: a first determination module 610 and a second determination module 620; wherein:
  • the first determining module 610 is configured to determine that there is a target PDU set that is not fully transmitted successfully when it is determined that the terminal is in a cell change; all or part of the PDUs that the incompletely transmitted target PDU set belongs to have not been sent or not successfully sent;
  • the second determination module 620 is configured to determine the transmission processing manner of the target PDU set.
  • the data transmission device determines that there is a target PDU set that has not been completely successfully transmitted when the terminal is determined to be in a cell change; and then determines the transmission processing method of the target PDU set to ensure the transmission of the target PDU set Accurate rate, saving resources.
  • the data transmission device also includes:
  • the first execution module is used to execute the transmission processing mode of the target PDU set, and the first execution module is specifically used for:
  • the transmission of all the PDUs belonging to the target PDU set is completed at the source base station, where the source base station is the base station accessed by the terminal before handover.
  • the target PDU set is downlink data
  • the target communication device is a source base station
  • the first determination module 610 is specifically used for:
  • the first execution module is specifically used for:
  • the target PDU set is uplink data, and the target communication device is a terminal;
  • the first determination module 610 is specifically used for:
  • the first execution module is specifically used for:
  • the PDU of the last uplink transmission of all the PDUs to which the target PDU set belongs includes a termination flag, and the termination flag is used to indicate that the PDU is the last of all the PDUs to which the target PDU set belongs PDUs.
  • the data transmission device also includes:
  • the second execution module is used to execute the transmission processing method of the target PDU set, and the second execution module is specifically used for:
  • the transmission of all the PDUs belonging to the target PDU set is completed at the target base station.
  • the target PDU set is downlink data
  • the target communication device is a source base station
  • the first determination module 610 is specifically used for:
  • the second execution module is specifically used for:
  • the target PDU set is downlink data, and the target communication device is the target base stand;
  • the first determination module 610 is specifically used for:
  • the second execution module is specifically used for:
  • the target PDU set is uplink data, and the target communication device is a terminal;
  • the first determination module 610 is specifically used for:
  • the second execution module is specifically used for:
  • the terminal After the terminal completes the handover and accesses the target base station, it sends all the PDUs to which the target PDU set belongs to the target base station.
  • the data transmission device also includes:
  • the third execution module is used to execute the transmission processing method of the target PDU set, and the third execution module is specifically used for:
  • the first data packet includes PDUs in the target PDU set that have not been sent to the communication peer and/or PDUs that have not been successfully sent to the communication peer.
  • the target PDU set is downlink data
  • the target communication device is a source base station
  • the first determination module 610 is specifically used for:
  • the source base station After the source base station sends the conditional handover configuration to the terminal, receiving a handover success message sent by the target base station;
  • the third execution module is specifically used for:
  • the source base station After the source base station receives the handover success message, send the first data packet to the target base station.
  • the target PDU set is downlink data
  • the target communication device is a target base station
  • the first determination module 610 is specifically used for:
  • the third execution module is specifically used for:
  • the target PDU set is downlink data
  • the target communication device is a source base station
  • the first determination module 610 is specifically used for:
  • the third execution module is specifically used for:
  • the target PDU set is downlink data
  • the target communication device is a target base station
  • the first determination module 610 is specifically used for:
  • the third execution module is specifically used for:
  • the target PDU set is uplink data, and the target communication device is a terminal;
  • the first determination module 610 is specifically used for:
  • the third execution module is specifically used for:
  • the terminal After the terminal completes the handover and accesses the target base station, the terminal sends the first data packet to the target base station.
  • the target PDU set is uplink data, and the target communication device is a terminal;
  • the first determination module 610 is specifically used for:
  • the third execution module is specifically used for:
  • the terminal After the terminal completes the handover and accesses the target base station, the terminal sends the first data packet to the target base station.
  • the data transmission device also includes:
  • the fourth execution module is used to execute the transmission processing method of the target PDU set, and the fourth execution module is specifically used for:
  • the second data packet is a PDU in the target PDU set that has not been sent to the communication peer and/or a PDU that has not been successfully sent to the communication peer.
  • the target PDU set is downlink data
  • the target communication device is a source base station
  • the first determination module 610 is specifically used for:
  • the source base station After the source base station sends the conditional handover configuration to the terminal, receiving a handover success message sent by the target base station;
  • the fourth execution module is specifically used for:
  • the target PDU set is downlink data
  • the target communication device is a source base station
  • the first determination module 610 is specifically used for:
  • the fourth execution module is specifically used for:
  • the target PDU set is uplink data, and the target communication device is a terminal;
  • the first determination module 610 is specifically used for:
  • the fourth execution module is specifically used for:
  • the target PDU set is uplink data, and the target communication device is a terminal;
  • the first determination module 610 is specifically used for:
  • the fourth execution module is specifically used for:
  • the second data packet is discarded.
  • the target PDU set is uplink data
  • the target communication device is a source base station or a target base station
  • the device also includes:
  • the first sending module is configured to send the identifier of the target PDU set to the terminal, where the identifier is used to indicate the target PDU set using the transmission processing mode.
  • 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 realized 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 technical solution of the present disclosure is essentially or part of the contribution to the prior art, 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 , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) execute all or part of the steps of the methods described in various embodiments of the present disclosure.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory) Memory, RAM), magnetic disk or optical disk and other media that can store program code.
  • the target communication device may be a terminal
  • Fig. 7 is a schematic structural diagram of a terminal provided by an embodiment of the present disclosure. As shown in Fig. 7, the terminal includes a memory 720, a transceiver 700, and a processor 710, wherein:
  • the memory 720 is used to store computer programs; the transceiver 700 is used to send and receive data under the control of the processor 710; the processor 710 is used to read the computer programs in the memory 720 and perform the following operations:
  • the transceiver 700 is configured to receive and send data under the control of the processor 710 .
  • the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 710 and various circuits of the memory represented by the memory 720 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 therefore will not be further described herein.
  • the bus interface provides the interface.
  • Transceiver 700 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 730 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 710 is responsible for managing the bus architecture and general processing, and the memory 720 may store data used by the processor 710 when performing operations.
  • the processor 710 may be a central processing unit (Central Processing Unit, CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an existing Field Programmable Gate Array (Field-Programmable Gate Array, FPGA) or Complex Programmable Logic Device (Complex Programmable Logic Device, CPLD), and 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 is used to execute any one of the methods provided by the embodiments of the present disclosure according to the obtained executable instructions by calling the computer program stored in the memory.
  • the processor and memory may also be physically separated.
  • the processor 710 is further configured to execute the transmission processing manner of the target PDU set, and the processor 710 is specifically further configured to:
  • the transmission of all the PDUs belonging to the target PDU set is completed at the source base station.
  • the target PDU set is uplink data, and the target communication device is a terminal;
  • the processor 710 is specifically used for:
  • the processor 710 is also specifically used for:
  • the PDU of the last uplink transmission of all the PDUs to which the target PDU set belongs includes a termination flag, and the termination flag is used to indicate that the PDU is the last of all the PDUs to which the target PDU set belongs PDUs.
  • the processor 710 is further configured to execute the transmission processing manner of the target PDU set, and the processor 710 is specifically further configured to:
  • the transmission of all the PDUs belonging to the target PDU set is completed at the target base station.
  • the target PDU set is uplink data, and the target communication device is a terminal;
  • the processor 710 is specifically used for:
  • the processor 710 is also specifically used for:
  • the terminal After the terminal completes the handover and accesses the target base station, it sends all the PDUs to which the target PDU set belongs to the target base station.
  • the processor 710 is further configured to execute the transmission processing manner of the target PDU set, and the processor 710 is specifically further configured to:
  • the first data packet includes PDUs in the target PDU set that have not been sent to the communication peer and/or PDUs that have not been successfully sent to the communication peer.
  • the target PDU set is uplink data, and the target communication device is a terminal;
  • the processor 710 is specifically used for:
  • the processor 710 is also specifically used for:
  • the terminal After the terminal completes the handover and accesses the target base station, the terminal sends the first data packet to the target base station.
  • the target PDU set is uplink data, and the target communication device is a terminal;
  • the processor 710 is specifically used for:
  • the processor 710 is also specifically used for:
  • the terminal After the terminal completes the handover and accesses the target base station, the terminal sends the first data packet to the target base station.
  • the processor 710 is further configured to execute the transmission processing manner of the target PDU set, and the processor 710 is specifically further configured to:
  • the second data packet is a PDU in the target PDU set that has not been sent to the communication peer and/or a PDU that has not been successfully sent to the communication peer.
  • the target PDU set is uplink data, and the target communication device is a terminal;
  • the processor 710 is specifically used for:
  • Processor 710 is also used to:
  • the target PDU set is uplink data, and the target communication device is a terminal;
  • the processor 710 is specifically used for:
  • Processor 710 is also used to:
  • the second data packet is discarded.
  • the above-mentioned terminal provided by the embodiment of the present invention can implement all the method steps implemented by the above-mentioned method embodiment in which the execution subject is the terminal, and can achieve the same technical effect.
  • the same parts and beneficial effects as those of the method embodiment will be described in detail.
  • the target communication device may be a source base station
  • FIG. 8 is a schematic structural diagram of a source base station provided by an embodiment of the present disclosure.
  • the source base station includes a memory 820, a transceiver 800, and a processor 810, where:
  • the memory 820 is used to store computer programs; the transceiver 800 is used to send and receive data under the control of the processor 810; the processor 810 is used to read the computer programs in the memory 820 and perform the following operations:
  • the transceiver 800 is configured to receive and send data under the control of the processor 810 .
  • the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 810 and various circuits of the memory represented by the memory 820 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 therefore not discussed herein. Let's describe it further.
  • the bus interface provides the interface.
  • the transceiver 800 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 810 is responsible for managing the bus architecture and general processing, and the memory 820 may store data used by the processor 810 when performing operations.
  • the processor 810 can 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 810 is further configured to execute the transmission processing manner of the target PDU set, and the processor 810 is specifically further configured to:
  • the transmission of all the PDUs belonging to the target PDU set is completed at the source base station, where the source base station is the base station accessed by the terminal before handover.
  • the target PDU set is downlink data
  • the target communication device is a source base station
  • the processor 810 is specifically used for:
  • the processor 810 is also specifically used for:
  • the processor 810 is further configured to execute a transmission processing manner of the target PDU set, where the transmission processing manner of the target PDU set includes:
  • the transmission of all the PDUs belonging to the target PDU set is completed at the target base station.
  • the target PDU set is downlink data
  • the target communication device is a source base station
  • the processor 810 is specifically used for:
  • the processor 810 is also specifically used for:
  • the processor 810 is further configured to execute the transmission processing manner of the target PDU set, and the processor 810 is specifically further configured to:
  • the first data packet includes PDUs in the target PDU set that have not been sent to the communication peer and/or PDUs that have not been successfully sent to the communication peer.
  • the target PDU set is downlink data
  • the target communication device is a source base station
  • the processor 810 is specifically used for:
  • the source base station After the source base station sends the conditional handover configuration to the terminal, receiving a handover success message sent by the target base station;
  • the processor 810 is also specifically used for:
  • the source base station After the source base station receives the handover success message, send the first data packet to the target base station.
  • the target PDU set is downlink data
  • the target communication device is a source base station
  • the processor 810 is specifically used for:
  • the processor 810 is also specifically used for:
  • the processor 810 is further configured to execute the transmission processing manner of the target PDU set, and the processor 810 is specifically further configured to:
  • the second data packet is a PDU in the target PDU set that has not been sent to the communication peer and/or a PDU that has not been successfully sent to the communication peer.
  • the target PDU set is downlink data
  • the target communication device is a source base station
  • the processor 810 is specifically used for:
  • the source base station After the source base station sends the conditional handover configuration to the terminal, receiving a handover success message sent by the target base station;
  • the processor 810 is also specifically used for:
  • the target PDU set is downlink data
  • the target communication device is a source base station
  • the processor 810 is specifically used for:
  • the processor 810 is also specifically used for:
  • the target PDU set is uplink data
  • the target communication device is a source base station
  • Processor 810 is also used to:
  • the source base station provided by the embodiments of the present disclosure can implement all the method steps implemented by the above method embodiment in which the source base station is the execution subject, and can achieve the same technical effect.
  • the parts and beneficial effects in the example that are the same as those in the method embodiment will be described in detail.
  • the target communication device may be a target base station
  • Fig. 9 is a schematic structural diagram of a target base station provided by an embodiment of the present disclosure.
  • the target base station includes a memory 920, a transceiver 900, and a processor 910, wherein:
  • the memory 920 is used to store computer programs; the transceiver 900 is used to send and receive data under the control of the processor 910; the processor 910 is used to read the computer programs in the memory 920 and perform the following operations:
  • the transceiver 900 is configured to receive and send data under the control of the processor 910 .
  • the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 910 and various circuits of the memory represented by the memory 920 are linked together.
  • the bus architecture can also integrate devices such as peripherals, voltage regulators, and power management circuits Various other circuits such as are linked together, which are well known in the art, and therefore, will not be further described herein.
  • the bus interface provides the interface.
  • Transceiver 900 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 910 is responsible for managing the bus architecture and general processing, and the memory 920 may store data used by the processor 910 when performing operations.
  • the processor 910 can 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 910 is further configured to execute the transmission processing manner of the target PDU set, and the processor 910 is specifically further configured to:
  • the transmission of all the PDUs belonging to the target PDU set is completed at the target base station.
  • the target PDU set is downlink data
  • the target communication device is a target base station
  • the processor 910 is specifically used for:
  • the processor 910 is also specifically used for:
  • the processor 910 is further configured to execute the transmission processing manner of the target PDU set, and the processor 910 is specifically further configured to:
  • the first data packet includes PDUs in the target PDU set that have not been sent to the communication peer and/or PDUs that have not been successfully sent to the communication peer.
  • the target PDU set is downlink data
  • the target communication device is a target base station
  • the processor 910 is specifically used for:
  • the processor 910 is also specifically used for:
  • the target PDU set is downlink data
  • the target communication device is a target base station
  • the processor 910 is specifically used for:
  • the processor 910 is also specifically used for:
  • the target PDU set is uplink data
  • the target communication device is a target base station
  • Processor 910 is also used to:
  • the above-mentioned target base station provided by the embodiments of the present disclosure can implement all the method steps implemented by the above-mentioned method embodiment in which the execution subject is the target base station, and can achieve the same technical effect.
  • the parts and beneficial effects in the example that are the same as those in the method embodiment will be described in detail.
  • an embodiment of the present disclosure further provides a processor-readable storage medium, where the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the above-mentioned
  • the method provided by each of the above embodiments includes:
  • 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 into a computer or other programmable data processing device on a computer or other programmable device to perform a series of operational steps to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device are used to implement one or more processes in the flow chart and/or or Block Diagram A step of a function specified in one or more blocks.

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Abstract

本公开实施例提供一种数据传输方法、装置、设备及存储介质，属于通信技术领域，所述方法包括：在确定终端处于小区变更的情况下，确定存在未完全传输成功的目标PDU set；所述未完全传输成功的目标PDU set所属的全部或部分PDU没有被发送或者没有被成功发送；确定所述目标PDU set的传输处理方式。本公开实施例通过在确定终端处于小区变更的情况下，确定存在未完全传输成功的目标PDU set；进而确定所述目标PDU set的传输处理方式，保障目标PDU set传输的正确率，节省资源。

Description

数据传输方法、装置、设备及存储介质
相关申请的交叉引用
本公开要求于2022年01月29日提交的申请号为202210112952.7，发明名称为“数据传输方法、装置、设备及存储介质”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
本公开涉及通信技术领域，尤其涉及一种数据传输方法、装置、设备及存储介质。
背景技术
扩展现实(Extended Reality，XR)数据传输具有数据量大，时延要求高的特点。
一个XR数据帧可以分割为多个互联网协议(Internet Protocol，IP)数据包，其中一个或几个IP数据包传输不正确时这个数据帧的其他IP包即使传输正确也不能正确解析出该数据帧，在终端小区变更下，XR数据帧中的一个或几个IP数据包的传输会出现不正确的情况，XR数据帧无法被正确解析，导致XR数据帧传输正确率低，导致资源浪费。
发明内容
本公开实施例提供一种数据传输方法、装置、设备及存储介质，用以解决现有技术中XR数据帧传输正确率低，导致资料效率降低的缺陷，实现保障XR数据帧传输正确率，节省资源。
第一方面，本公开实施例提供一种数据传输方法，包括：
在确定终端处于小区变更的情况下，确定存在未完全传输成功的目标PDU set；所述未完全传输成功的目标PDU set所属的全部或部分PDU没有 被发送或者没有被成功发送；
确定所述目标PDU set的传输处理方式。
可选地，根据本公开一个实施例的数据传输方法，所述目标PDU set的传输处理方式，包括：
在源基站传输完成所述目标PDU set所属的全部PDU，所述源基站为所述终端切换之前接入的基站。
可选地，根据本公开一个实施例的数据传输方法，所述目标PDU set为下行数据，所述目标通信设备为源基站；
所述确定终端处于小区变更，包括：
基于终端测量报告，确定向所述终端发送切换命令；
所述在源基站传输完成所述目标PDU set所属的全部PDU，包括：
在向所述终端发送切换命令之前，向所述终端发送所述目标PDU set所属的全部PDU。
可选地，根据本公开一个实施例的数据传输方法，所述目标PDU set为上行数据，所述目标通信设备为终端；
所述确定终端处于小区变更，包括：
接收源基站发送的切换命令；
基于所述切换命令，确定从源基站断开，接入目标基站，所述目标基站为所述终端完成切换之后接入的基站；
所述在源基站传输完成所述目标PDU set所属的全部PDU，包括：
在从所述源基站断开之前，向所述源基站发送所述目标PDU set所属的全部PDU。
可选地，根据本公开一个实施例的数据传输方法，所述目标PDU set所属的全部PDU中的最后一个上行传输的PDU中包括终止标志，所述终止标志用于表征所述PDU为所述目标PDU set所属的全部PDU中的最后一个PDU。
可选地，根据本公开一个实施例的数据传输方法，所述目标PDU set的传输处理方式，包括：
在目标基站传输完成所述目标PDU set所属的全部PDU。
可选地，根据本公开一个实施例的数据传输方法，所述目标PDU set为下行数据，所述目标通信设备为源基站；
所述确定终端处于小区变更，包括：
基于终端测量报告，确定向所述终端发送切换命令；
所述在目标基站传输完成所述目标PDU set所属的全部PDU，包括：
在所述确定向所述终端发送切换命令的情况下，向目标基站发送所述目标PDU set所属的全部PDU。
可选地，根据本公开一个实施例的数据传输方法，所述目标PDU set为下行数据，所述目标通信设备为目标基站；
所述确定终端处于小区变更，包括：
接收源基站发送的切换请求；
向所述源基站发送切换请求确认信息，所述切换请求确认信息用于触发所述源基站向所述终端发送切换命令；
所述在目标基站传输完成所述目标PDU set所属的全部PDU，包括：
接收所述源基站发送的所述目标PDU set所属的全部PDU；
在所述终端完成切换之后，向所述终端发送所述目标PDU set所属的全部PDU。
可选地，根据本公开一个实施例的数据传输方法，所述目标PDU set为上行数据，所述目标通信设备为终端；
所述确定终端处于小区变更，包括：
接收源基站发送的切换命令；
基于所述切换命令，确定从所述源基站断开，接入目标基站；
所述在目标基站传输完成所述目标PDU set所属的全部PDU，包括：
在所述终端完成切换，接入所述目标基站之后，向所述目标基站发送所述目标PDU set所属的全部PDU。
可选地，根据本公开一个实施例的数据传输方法，所述目标PDU set的传输处理方式，包括：
在目标基站传输第一数据包；所述第一数据包包括所述目标PDU set中未向通信对端发送的PDU和/或未成功发送给通信对端的PDU。
可选地，根据本公开一个实施例的数据传输方法，所述目标PDU set为下行数据，所述目标通信设备为源基站；
所述确定终端处于小区变更，包括：
在所述源基站向终端发送条件切换配置之后，接收目标基站发送的切换成功消息；
所述在目标基站传输第一数据包，包括：
在所述源基站接收到所述切换成功消息之后，向所述目标基站发送所述第一数据包。
可选地，根据本公开一个实施例的数据传输方法，所述目标PDU set为下行数据，所述目标通信设备为目标基站；
所述确定终端处于小区变更，包括：
在所述终端完成切换，接入所述目标基站之后，向源基站发送切换成功消息；
所述在目标基站传输第一数据包，包括：
接收所述源基站发送的所述第一数据包；
向所述终端发送所述第一数据包。
可选地，根据本公开一个实施例的数据传输方法，所述目标PDU set为下行数据，所述目标通信设备为源基站；
所述确定终端处于小区变更，包括：
基于终端测量报告，确定向终端发送切换命令；
所述在目标基站传输第一数据包，包括：
在确定向所述终端发送所述切换命令的情况下，向所述目标基站发送所述第一数据包。
可选地，根据本公开一个实施例的数据传输方法，所述目标PDU set为下行数据，所述目标通信设备为目标基站；
所述确定终端处于小区变更，包括：
接收源基站发送的切换请求；
向所述源基站发送切换请求确认信息，所述切换请求确认信息用于触发所述源基站向所述终端发送切换命令；
所述在目标基站传输第一数据包，包括：
接收所述源基站发送的所述第一数据包；
在所述终端完成切换之后，向所述终端发送所述第一数据包。
可选地，根据本公开一个实施例的数据传输方法，所述目标PDU set为上行数据，所述目标通信设备为终端；
所述确定终端处于小区变更，包括：
接收源基站发送的切换命令；
基于所述切换命令，确定从所述源基站断开，接入所述目标基站；
所述在目标基站传输第一数据包，包括：
在所述终端完成切换，接入所述目标基站之后，向所述目标基站发送所述第一数据包。
可选地，根据本公开一个实施例的数据传输方法，所述目标PDU set为上行数据，所述目标通信设备为终端；
所述确定终端处于小区变更，包括：
基于目标小区配置和切换条件，确定终端处于条件切换的场景，在满足所述切换条件的情况下接入所述目标基站；
所述在目标基站传输第一数据包，包括：
在所述终端完成切换，接入所述目标基站之后，向所述目标基站发送所述第一数据包。
可选地，根据本公开一个实施例的数据传输方法，所述目标PDU set的传输处理方式，包括：
丢弃第二数据包；
所述第二数据包为所述目标PDU set中未向通信对端发送的PDU和/或未成功发送给通信对端的PDU。
可选地，根据本公开一个实施例的数据传输方法，所述目标PDU set为 下行数据，所述目标通信设备为源基站；
所述确定终端处于小区变更，包括：
在所述源基站向所述终端发送条件切换配置之后，接收目标基站发送的切换成功消息；
所述丢弃第二数据包，包括：
在所述源基站接收到所述切换成功消息之后，丢弃所述第二数据包。
可选地，根据本公开一个实施例的数据传输方法，所述目标PDU set为下行数据，所述目标通信设备为源基站；
所述确定终端处于小区变更，包括：
基于终端测量报告，确定向终端发送切换命令；
所述丢弃第二数据包，包括：
在确定向所述终端发送所述切换命令的情况下，丢弃第二数据包。
可选地，根据本公开一个实施例的数据传输方法，所述目标PDU set为上行数据，所述目标通信设备为终端；
所述确定终端处于小区变更，包括：
接收源基站发送的切换命令；
基于所述切换命令，确定从所述源基站断开，接入目标基站；
所述丢弃第二数据包，包括：
在接收到所述切换命令之后，丢弃所述第二数据包。
可选地，根据本公开一个实施例的数据传输方法，所述目标PDU set为上行数据，所述目标通信设备为终端；
所述确定终端处于小区变更，包括：
基于目标小区配置和切换条件，确定终端处于条件切换的场景，在满足所述切换条件的情况下接入目标基站；
所述丢弃第二数据包，包括：
在确定满足所述切换条件之后，丢弃所述第二数据包。
可选地，根据本公开一个实施例的数据传输方法，所述目标PDU set为上行数据，所述目标通信设备为源基站或目标基站；
所述方法还包括：
向所述终端发送所述目标PDU set的标识，所述标识用于指示使用所述传输处理方式的所述目标PDU set。
第二方面，本公开实施例还提供一种目标通信设备，包括：
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：
在确定终端处于小区变更的情况下，确定存在未完全传输成功的目标PDU set；所述未完全传输成功的目标PDU set所属的全部或部分PDU没有被发送或者没有被成功发送；
确定所述目标PDU set的传输处理方式。
可选地，根据本公开一个实施例的目标通信设备，所述目标PDU set的传输处理方式，包括：
在源基站传输完成所述目标PDU set所属的全部PDU，所述源基站为所述终端切换之前接入的基站。
可选地，根据本公开一个实施例的目标通信设备，所述目标PDU set为下行数据，所述目标通信设备为源基站；
所述确定终端处于小区变更，包括：
基于终端测量报告，确定向所述终端发送切换命令；
所述在源基站传输完成所述目标PDU set所属的全部PDU，包括：
在向所述终端发送切换命令之前，向所述终端发送所述目标PDU set所属的全部PDU。
可选地，根据本公开一个实施例的目标通信设备，所述目标PDU set为上行数据，所述目标通信设备为终端；
所述确定终端处于小区变更，包括：
接收源基站发送的切换命令；
基于所述切换命令，确定从源基站断开，接入目标基站，所述目标基站为所述终端完成切换之后接入的基站；
所述在源基站传输完成所述目标PDU set所属的全部PDU，包括：
在从所述源基站断开之前，向所述源基站发送所述目标PDU set所属的全部PDU。
可选地，根据本公开一个实施例的目标通信设备，所述目标PDU set所属的全部PDU中的最后一个上行传输的PDU中包括终止标志，所述终止标志用于表征所述PDU为所述目标PDU set所属的全部PDU中的最后一个PDU。
可选地，根据本公开一个实施例的目标通信设备，所述目标PDU set的传输处理方式，包括：
在目标基站传输完成所述目标PDU set所属的全部PDU。
可选地，根据本公开一个实施例的目标通信设备，所述目标PDU set为下行数据，所述目标通信设备为源基站；
所述确定终端处于小区变更，包括：
基于终端测量报告，确定向所述终端发送切换命令；
所述在目标基站传输完成所述目标PDU set所属的全部PDU，包括：
在所述确定向所述终端发送切换命令的情况下，向目标基站发送所述目标PDU set所属的全部PDU。
可选地，根据本公开一个实施例的目标通信设备，所述目标PDU set为下行数据，所述目标通信设备为目标基站；
所述确定终端处于小区变更，包括：
接收源基站发送的切换请求；
向所述源基站发送切换请求确认信息，所述切换请求确认信息用于触发所述源基站向所述终端发送切换命令；
所述在目标基站传输完成所述目标PDU set所属的全部PDU，包括：
接收所述源基站发送的所述目标PDU set所属的全部PDU；
在所述终端完成切换之后，向所述终端发送所述目标PDU set所属的全部PDU。
可选地，根据本公开一个实施例的目标通信设备，所述目标PDU set为上行数据，所述目标通信设备为终端；
所述确定终端处于小区变更，包括：
接收源基站发送的切换命令；
基于所述切换命令，确定从所述源基站断开，接入目标基站；
所述在目标基站传输完成所述目标PDU set所属的全部PDU，包括：
在所述终端完成切换，接入所述目标基站之后，向所述目标基站发送所述目标PDU set所属的全部PDU。
可选地，根据本公开一个实施例的目标通信设备，所述目标PDU set的传输处理方式，包括：
在目标基站传输第一数据包；所述第一数据包包括所述目标PDU set中未向通信对端发送的PDU和/或未成功发送给通信对端的PDU。
可选地，根据本公开一个实施例的目标通信设备，所述目标PDU set为下行数据，所述目标通信设备为源基站；
所述确定终端处于小区变更，包括：
在所述源基站向终端发送条件切换配置之后，接收目标基站发送的切换成功消息；
所述在目标基站传输第一数据包，包括：
在所述源基站接收到所述切换成功消息之后，向所述目标基站发送所述第一数据包。
可选地，根据本公开一个实施例的目标通信设备，所述目标PDU set为下行数据，所述目标通信设备为目标基站；
所述确定终端处于小区变更，包括：
在所述终端完成切换，接入所述目标基站之后，向源基站发送切换成功消息；
所述在目标基站传输第一数据包，包括：
接收所述源基站发送的所述第一数据包；
向所述终端发送所述第一数据包。
可选地，根据本公开一个实施例的目标通信设备，所述目标PDU set为下行数据，所述目标通信设备为源基站；
所述确定终端处于小区变更，包括：
基于终端测量报告，确定向终端发送切换命令；
所述在目标基站传输第一数据包，包括：
在确定向所述终端发送所述切换命令的情况下，向所述目标基站发送所述第一数据包。
可选地，根据本公开一个实施例的目标通信设备，所述目标PDU set为下行数据，所述目标通信设备为目标基站；
所述确定终端处于小区变更，包括：
接收源基站发送的切换请求；
向所述源基站发送切换请求确认信息，所述切换请求确认信息用于触发所述源基站向所述终端发送切换命令；
所述在目标基站传输第一数据包，包括：
接收所述源基站发送的所述第一数据包；
在所述终端完成切换之后，向所述终端发送所述第一数据包。
可选地，根据本公开一个实施例的目标通信设备，所述目标PDU set为上行数据，所述目标通信设备为终端；
所述确定终端处于小区变更，包括：
接收源基站发送的切换命令；
基于所述切换命令，确定从所述源基站断开，接入所述目标基站；
所述在目标基站传输第一数据包，包括：
在所述终端完成切换，接入所述目标基站之后，向所述目标基站发送所述第一数据包。
可选地，根据本公开一个实施例的目标通信设备，所述目标PDU set为上行数据，所述目标通信设备为终端；
所述确定终端处于小区变更，包括：
基于目标小区配置和切换条件，确定终端处于条件切换的场景，在满足所述切换条件的情况下接入所述目标基站；
所述在目标基站传输第一数据包，包括：
在所述终端完成切换，接入所述目标基站之后，向所述目标基站发送所述第一数据包。
可选地，根据本公开一个实施例的目标通信设备，所述目标PDU set的传输处理方式，包括：
丢弃第二数据包；
所述第二数据包为所述目标PDU set中未向通信对端发送的PDU和/或未成功发送给通信对端的PDU。
可选地，根据本公开一个实施例的目标通信设备，所述目标PDU set为下行数据，所述目标通信设备为源基站；
所述确定终端处于小区变更，包括：
在所述源基站向所述终端发送条件切换配置之后，接收目标基站发送的切换成功消息；
所述丢弃第二数据包，包括：
在所述源基站接收到所述切换成功消息之后，丢弃所述第二数据包。
可选地，根据本公开一个实施例的目标通信设备，所述目标PDU set为下行数据，所述目标通信设备为源基站；
所述确定终端处于小区变更，包括：
基于终端测量报告，确定向终端发送切换命令；
所述丢弃第二数据包，包括：
在确定向所述终端发送所述切换命令的情况下，丢弃第二数据包。
可选地，根据本公开一个实施例的目标通信设备，所述目标PDU set为上行数据，所述目标通信设备为终端；
所述确定终端处于小区变更，包括：
接收源基站发送的切换命令；
基于所述切换命令，确定从所述源基站断开，接入目标基站；
所述丢弃第二数据包，包括：
在接收到所述切换命令之后，丢弃所述第二数据包。
可选地，根据本公开一个实施例的目标通信设备，所述目标PDU set为 上行数据，所述目标通信设备为终端；
所述确定终端处于小区变更，包括：
基于目标小区配置和切换条件，确定终端处于条件切换的场景，在满足所述切换条件的情况下接入目标基站；
所述丢弃第二数据包，包括：
在确定满足所述切换条件之后，丢弃所述第二数据包。
可选地，根据本公开一个实施例的目标通信设备，所述目标PDU set为上行数据，所述目标通信设备为源基站或目标基站；
所述操作还包括：
向所述终端发送所述目标PDU set的标识，所述标识用于指示使用所述传输处理方式的所述目标PDU set。
第三方面，本公开实施例还提供一种数据传输装置，包括：
第一确定模块，用于在确定终端处于小区变更的情况下，确定存在未完全传输成功的目标PDU set；所述未完全传输成功的目标PDU set所属的全部或部分PDU没有被发送或者没有被成功发送；
第二确定模块，用于确定所述目标PDU set的传输处理方式。
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数据传输方法的步骤。
本公开实施例提供的数据传输方法、装置、设备及存储介质，通过在确定终端处于小区变更的情况下，确定存在未完全传输成功的目标PDU set；进而确定所述目标PDU set的传输处理方式，保障目标PDU set传输的正确率，节省资源。
附图说明
为了更清楚地说明本公开实施例或现有技术中的技术方案，下面将对实施例或现有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XR业务建模中数据包的示意图；
图2是相关技术提供的XR业务数据包映射为多个5G系统空口IP包的示意图；
图3是相关技术提供的终端执行常规切换流程示意图；
图4是相关技术提供的终端执行条件切换流程示意图；
图5是本公开实施例提供的数据传输方法的流程示意图；
图6是本公开实施例提供的数据传输装置的结构示意图；
图7是本公开实施例提供的一种终端的结构示意图；
图8是本公开实施例提供的一种源基站的结构示意图；
图9是本公开实施例提供的一种目标基站的结构示意图。
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。
本公开实施例提供了数据传输方法、装置、设备及存储介质，用以保障目标PDU set传输的正确率，节省资源。
其中，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。
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终端设备，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，终端设备的名称可能也不相同，例如在5G系统中，终端设备可以称为用户设备(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。
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。
首先对以下内容进行介绍：
1.XR业务及其传输特点
扩展现实(eXtened Reality，XR)和云游戏(Cloud Game，CG)作为最重要的5G媒体应用之一，具有低时延、高吞吐量和高可靠性的要求，要求短时间内进行较大数据的传输，这意味着在短时间内其突发吞吐量可能远高于平均吞吐量。例如，平均吞吐量为100Mbps的XR业务在短测量窗口上的突发吞吐量可达300Mbps，且同时还需保证高可靠性。XR是不同类型的现实的总称，指的是由计算机技术和设备产生的所有真实和虚拟相结合的环境和人 机交互。它包括增强现实(Augmented Reality，AR)、混合现实(Mixed Reality，MR)和虚拟现实(Virtual Reality，VR)等代表形式。
图1是相关技术提供的XR业务建模中数据包的示意图；如图1所示，XR业务在5G系统中以帧级数据包建模；
图2是相关技术提供的XR业务数据包映射为多个5G系统空口IP包的示意图，如图2所示，每个数据包对应一个XR帧(还可以称为数据帧)，同一数据帧可分割为多个IP包，数据帧对应一组分组数据单元PDU set，同一个数据帧分割的每个IP包对应一个分组数据单元PDU。
XR包含多种数据帧(PDU set)，每种帧有其传输特性和传输要求，例如，I-frame(Intra-coded picture)是帧内编码，可以表征完整的画面，P-frame(Predicted picture)是帧间编码，只需要携带与前一帧的不同信息。因此，I-frame数据量大，可靠性要求高；P-frame数据量小，可靠性相对I-frame要求低。
XR业务中，业务特性要求是针对数据帧(PDU set)的，例如针对场景、视频混合流，业务特性需求为：周期60fps(frame per second，帧每秒)；数据速率10Mbps或20Mbps；PDB(packet delay budget，分组时延预算)30ms(必选)或10ms或15ms或60ms(可选)。
因此，XR业务基于数据帧(PDU set)建模，一个数据帧(PDU set)可以分割成多个IP包(PDU)，空口传输以IP包(PDU)为基本单位进行。一个数据帧(PDU set)对应的多个IP包(PDU)中，其中一个或几个IP包(PDU)传输失败之后，该数据帧(PDU set)可能不能正确解码，同时，由于数据帧(PDU set)的数据流大，要将后续IP包(PDU)都传正确需要消耗较多资源，同时可能造成同一个流的后续数据帧(PDU set)传输时延，或其他流数据帧(PDU set)的传输时延。不利于满足XR业务的传输时延要求。
图3是相关技术提供的终端执行常规切换流程示意图，如图3所示，终端相关的过程主要在图3中的第1步：切换测量，图3中的第6步：源小区发起切换，比如通过无线资源控制(Radio Resource Control，RRC同步重配 命令)发起，和图3中的第8步：切换到目标小区。图3中的第6步中，源基站发送RRC重配消息给终端，该RRC重配消息中包含目标小区信息和包括随机接入参数在内的终端接入目标小区的信息。图3中的第8步包含终端和目标基站间的随机接入过程和终端向目标基站发送与源基站指示切换的RRC重配消息对应的RRC重配完成消息的过程。
终端在源小区接收到RRC同步重配命令确定要切换到目标小区(图3中的第6步)之后，从源小区断开，进行分组数据汇聚协议(Packet Data Convergence Protocol，PDCP)重建。对配置为无线链路控制协议非确认模式(Radio Link Control Unacknowledgement Mode，RLC UM)的数据无线承载(Data Radio Bearer，DRB)，终端对于下行数据传输，PDCP重建的行为是将从源小区接收到的数据包PDCP PDU进行排序，将解析出的PDCP SDU按对应count值的升序递交给高层；终端对于上行数据传输，如果还没递交给低层(即RLC层)的数据包(即PDCP服务数据单元(Service Data Unit，SDU)或构造成PDCP PDU还没递交给低层的数据包)，将在目标小区发送，对于已经递交给低层的数据包(即已经组装成PDCP PDU并递交给低层的数据包)，则不管是否在源小区发送成功，都不会在目标小区重传。
图4是相关技术提供的终端执行条件切换流程示意图，如图4所示，条件切换(Conditional Handover，CHO)是一种切换优化方式，终端在满足切换条件时，自行执行切换过程，而不需要接收源基站的切换命令。源基站在接收到目标基站的切换成功消息(HANDOVER SUCCESS message)之后，才知道终端完成了切换。其他过程，包括用户面过程与传统切换相同。
现有切换过程对于XR数据帧传输有两个缺陷：(1)切换过程中，属于同一个数据帧的不同IP包可能部分在源基站传输，部分在目标基站传输，而在源基站和目标基站传输是有切换中断时延的，这导致了数据帧传输时延增大，有可能不能满足XR数据帧传输的低时延要求；(2)RLC UM允许丢包，对于属于同一个数据帧的不同IP包，如果在源小区部分IP包丢失，在目标小区即使成功传输了后续IP包，该数据帧不能正确解析，实际 上造成了目标小区空口资源的浪费。
因此，本公开各实施例提供了一种数据传输方法、装置、设备及存储介质。
图5是本公开实施例提供的数据传输方法的流程示意图，如图5所示，该方法的执行主体为目标通信设备，该方法可以包括如下步骤500至步骤510：
步骤500，在确定终端处于小区变更的情况下，确定存在未完全传输成功的目标PDU set；未完全传输成功的目标PDU set所属的全部或部分PDU没有被发送或者没有被成功发送；
步骤510，确定目标PDU set的传输处理方式。
可选地，目标PDU set可以是XR数据帧；
可选地，XR数据帧可分解为一组分组数据单元集合PDU set，XR数据帧所属的IP包在无线网络中对应分组数据单元PDU。即XR数据帧对应PDU set，IP包对应PDU。
可选地，由于终端处于小区变更下时，容易存在PDU set还未传输完成就执行切换导致全部或部分PDU还没有被发送或者没有被成功发送；因此可以在确定终端处于小区变更的情况下，确定存在如上未完全传输成功的目标PDU set；
可选地，在确定存在如上未完全传输成功的目标PDU set之后，可以确定该目标PDU set的传输处理方式，以使目标PDU set可以基于合适的传输处理方式进行传输处理，保障目标PDU set传输的正确率；
可选地，可以基于目标PDU set的传输性能需求，确定目标PDU set的传输处理方式；
比如在目标PDU set的传输性能需求为低时延的情况下，可以确定目标PDU set的传输处理方式为可以保证低时延的方式；
比如在目标PDU set的传输性能需求为高可靠性的情况下，可以确定目标PDU set的传输处理方式为可以保证高可靠性的方式；
在本公开实施例中，通过针对未完全传输的目标PDU set确定合适的传 输处理方式，可以保证满足目标PDU set的传输性能需求，提高目标PDU set传输的正确率，进而节省传输资源。
本公开实施例提供的数据传输方法，通过在确定终端处于小区变更的情况下，确定存在未完全传输成功的目标PDU set；进而确定目标PDU set的传输处理方式，保障目标PDU set传输的正确率，节省资源。
可选地，目标PDU set的传输处理方式，包括：
在源基站传输完成目标PDU set所属的全部PDU。
可选地，可以确定目标PDU set的传输处理方式包括：在源基站传输目标PDU set所属的全部PDU，源基站为终端切换之前接入的基站。
可选地，可以确定目标PDU set的传输处理方式包括：在源基站传输成功目标PDU set所属的全部PDU。
可选地，可以确定目标PDU set的传输处理方式包括：在源基站传输目标PDU set所属的全部PDU。
可选地，在源基站传输完成目标PDU set所属的全部PDU可以指在源基站传输成功目标PDU set所属的全部PDU。
可选地，在源基站传输完成目标PDU set所属的全部PDU，可以是指，在执行所述终端切换之前，发送成功所述目标PDU set。
可选地，在源基站传输完成目标PDU set所属的全部PDU，可以是指，在所述终端执行切换之前，所述目标PDU set所属的全部PDU被成功发送。
可选地，所述方法还包括：执行所述目标PDU set的传输处理方式，即，所述方法还包括：在源基站传输完成目标PDU set所属的全部PDU。
可选地，可以在目标PDU set的传输性能需求为高可靠性和/或低时延的情况下，为了保证目标PDU set中的PDU不会因为终端执行切换导致传输失败或传输终端等情况，或为了保证不会因为终端执行切换后属于同一PDU set的PDU由不同基站传输导致有部分PDU丢失等类似情况，可以在确定终端处于小区变更的情况下，先不执行终端切换过程，而是先将目标PDU set所属的全部PDU成功传输以后，再执行终端切换过程，还可以保障 低时延。
在本公开实施例中，可以通过将属于同一个目标PDU set(比如XR数据帧)的PDU在同一个基站传输，以保证目标PDU set的高可靠性传输，有效提高了传输成功的正确率。
可选地，目标PDU set为下行数据，目标通信设备为源基站；
确定终端处于小区变更，包括：
基于终端测量报告，确定向终端发送切换命令；
在源基站传输完成目标PDU set所属的全部PDU，包括：
在向终端发送切换命令之前，向终端发送目标PDU set所属的全部PDU。
可选地，若目标PDU set为下行数据，该下行数据的发送端为源基站；为了实现在源基站传输目标PDU set所属的全部PDU，源基站可以基于终端测量报告，确定终端处于小区变更，即需要向终端发送切换命令的情况下，可以首先向终端发送目标PDU set所属的全部PDU，在目标PDU set的全部PDU均成功发送完成之后，再向终端发送切换命令，指示终端进行切换。
可选地，若目标PDU set为下行数据，该下行数据的发送端为源基站；以目标PDU set为XR数据帧为例，源基站可以在接收到终端测量报告，并基于终端测量报告确定要发起终端切换过程的情况下，可以先将已到达该源基站的属于同一个XR数据帧的PDU(可以称为一个PDU组)都发送给终端之后，再向终端发送切换命令。
可选地，在RAN侧PDU可以等同于SDAP SDU。
在一个实施例中，若目标PDU set为下行数据，该下行数据的发送端为源基站；终端侧可以根据源基站的测量配置执行测量上报；源基站可以在接收到终端测量报告，并基于终端测量报告决定发起终端切换过程的情况下，先将已到达该源基站的属于同一个XR数据帧的PDU都发送给终端之后，再向终端发送切换命令。终端可以在接收到源基站的切换命令之后，执行切换过程。
可选地，本公开实施例中，通过在确定终端处于切换的场景下，先完成 所有待传输的数据帧的传输后再执行终端切换过程，对于时延要求不太高的XR业务，可以最大程度保证数据帧传输的可靠性。
可选地，目标PDU set为上行数据，目标通信设备为终端；
确定终端处于小区变更，包括：
接收源基站发送的切换命令；
基于切换命令，确定从源基站断开，接入目标基站，目标基站为终端完成切换之后接入的基站；
在源基站传输完成目标PDU set所属的全部PDU，包括：
在从源基站断开之前，向源基站发送目标PDU set所属的全部PDU。
可选地，若目标PDU set为上行数据，该上行数据的发送端为终端；为了实现在源基站传输目标PDU set所属的全部PDU，终端可以在接收到源基站发送的切换命令，并基于切换命令确定需要从源基站断开，接入目标基站的情况下，可以首先向源基站发送目标PDU set所属的全部PDU，在目标PDU set的全部PDU均发送完成之后，再向从源基站断开，接入目标基站，完成切换；
可选地，若目标PDU set为上行数据，该上行数据的发送端为终端。
可选地，若目标PDU set为上行数据，该上行数据的发送端为终端；以目标PDU set为XR数据帧为例，终端接收到源基站基于终端测量报告发送的切换命令之后，如果属于同一个XR数据帧的PDU(称为一个PDU组)已经开始在空口传输，终端可以将该PDU组的PDU都发送给源基站之后，再执行切换过程，从源基站断开，接入目标基站。
可选地，在RAN侧PDU可以等同于SDAP SDU。
可选地，本公开实施例中，通过在确定终端处于切换的场景下，先完成所有待传输的数据帧的传输后再执行终端切换过程，对于时延要求不太高的XR业务，可以最大程度保证数据帧传输的可靠性。
可选地，目标PDU set所属的全部PDU中的最后一个上行传输的PDU中包括终止标志，终止标志用于表征PDU为目标PDU set所属的全部PDU中的最后一个PDU。
可选地，由于在确定终端处于切换的场景下，先完成所有待传输的目标PDU set的传输后再执行终端切换过程，为了保证通信对端可以在待传输的目标PDU set全部传输完成后及时启动终端切换过程，因此可以在目标PDU set所属的最后一个传输的PDU中携带终止标志，以告知通信对端：截至终止标志所在的PDU，待传输的目标PDU set所属的全部PDU已全部被发送。
可选地，由于在确定终端处于切换的场景下，先完成所有待传输的目标PDU set的传输后再执行终端切换过程，为了保证源基站可以在待传输的目标PDU set全部传输完成后及时启动终端切换过程，因此终端可以在目标PDU set所属的最后一个上行传输的PDU中携带终止标志，以告知源基站：截至终止标志所在的PDU，待传输的目标PDU set所属的全部PDU已全部被发送。
在一个实施例中，若目标PDU set为上行数据，该上行数据的发送端为终端；终端侧可以根据源基站的测量配置执行测量上报；源基站可以在接收到终端测量报告，并基于终端测量报告决定发起终端切换过程，则向终端发送切换命令；终端接收到源基站的切换命令之后，如果属于同一个XR数据帧的PDU已经开始在空口传输，则暂时先不执行切换过程，而是先将该PDU组的PDU都发送给源基站，在终端侧待发送的XR数据帧全部发送成功后再从源基站断开接入目标基站；
可选的，终端可以在最后一个向源基站发送的上行传输中携带终止标记End Marker，该终止标记携带在PDCP PDU中或SDAP PDU中。
源基站也会在向终端发送切换命令之后，继续接收终端发送的上行传输，在确定该终端上行数据传输终止之后，才断开与该终端的传输；
其中，源基站确定该终端上行数据传输终止的条件可以为：在发送切换命令之后，接收到终端的上行数据则启动或重启“上行数据传输终止换定时器”，该定时器超时后则认为该终端的上行传输终止，该定时器长度为基准预定义的或由核心网根据业务特性为基准配置的；或，源基站接收到目标基站向源基站发送的“切换成功消息”；或，终端发送的上行传输中，包含终 止标记End Marker，该终止标记携带在PDCP PDU中或SDAP PDU中。
可选地，可以在终端接入目标基站之后，目标基站向源基站发送“切换成功消息”。
其中，基站可以预先为终端配置可以执行PDU组在源基站传输，从而传输延迟切换过程的DRB ID或QoS flow ID。
可选地，目标PDU set的传输处理方式，包括：
在目标基站传输完成目标PDU set所属的全部PDU。
可选地，可以确定目标PDU set的传输处理方式包括：在目标基站传输完成目标PDU set所属的全部PDU。
可选地，可以确定目标PDU set的传输处理方式包括：在目标基站传输目标PDU set所属的全部PDU。
可选地，可以确定目标PDU set的传输处理方式包括：在目标基站传输成功目标PDU set所属的全部PDU。
可选地，在目标基站传输完成目标PDU set所属的全部PDU可以指在目标基站传输成功目标PDU set所属的全部PDU。
可选地，在目标基站传输目标PDU set所属的全部PDU可以是指：在确定终端要执行切换的情况下，可以发送完成所述目标PDU set；即可以在确定终端要执行切换的“确定”这一动作之后，或者在终端执行切换之后，发送完成目标PDU set所属的全部PDU。
可选地，所述方法还包括：目标PDU set的传输处理方式；即所述方法还包括：在目标基站传输完成目标PDU set所属的全部PDU。
可选地，可以在目标PDU set的传输性能需求为高可靠性的情况下，为了保证目标PDU set中的PDU不会因为终端执行切换导致传输失败或传输终端等情况，或为了保证不会因为终端执行切换后属于同一数据帧的PDU由不同基站传输导致有部分PDU丢失等类似情况，可以在确定终端处于小区变更的情况下，在确定终端要执行切换的情况下，在目标基站传输目标PDU set所属的全部PDU；
在本公开实施例中，可以通过将属于同一个目标PDU set(比如XR数 据帧)的PDU在同一个基站传输，以保证目标PDU set的高可靠性传输，有效提高了传输成功的正确率。
可选地，目标PDU set为下行数据，目标通信设备为源基站；
确定终端处于小区变更，包括：
基于终端测量报告，确定向终端发送切换命令；
在目标基站传输完成目标PDU set所属的全部PDU，包括：
在确定向终端发送切换命令的情况下，向目标基站发送目标PDU set所属的全部PDU。
可选地，若目标PDU set为下行数据，该下行数据的发送端为源基站；为了实现在目标基站传输目标PDU set所属的全部PDU，源基站可以在基于终端测量报告，确定终端处于小区变更，即需要向终端发送切换命令的情况下，向目标基站发送目标PDU set所属的全部PDU，以使目标基站接收到目标PDU set所属的全部PDU之后，将目标PDU set所属的全部PDU发送给终端，完成这一下行传输。
可选地，若目标PDU set为下行数据，该下行数据的发送端为源基站；以目标PDU set为XR数据帧为例，源基站可以在接收到终端测量报告，并基于终端测量报告确定要发起终端切换过程的情况下，如果属于同一个数据帧的PDU(称为一个PDU组)没有全部发送给终端，则源基站可以将该PDU组的全部PDU都转发给目标基站(即将包含该PDU的SDAP SDU转发给目标基站)，以使目标基站向终端发送该PDU组的所有PDU。
可选地，目标PDU set为下行数据，目标通信设备为目标基站；
确定终端处于小区变更，包括：
接收源基站发送的切换请求；
向源基站发送切换请求确认信息，切换请求确认信息用于触发源基站向终端发送切换命令；
在目标基站传输完成目标PDU set所属的全部PDU，包括：
接收源基站发送的目标PDU set所属的全部PDU；
在终端完成切换之后，向终端发送目标PDU set所属的全部PDU。
可选地，若目标PDU set为下行数据，该下行数据的发送端为源基站；为了实现在目标基站传输目标PDU set所属的全部PDU，源基站可以在基于终端测量报告，确定终端处于小区变更的情况下，向目标基站发送切换请求，目标基站接收到切换请求后可以向源基站发送切换请求确认信息，触发源基站向终端发送切换命令；则源基站可以向目标基站发送目标PDU set所属的全部PDU，目标基站可以接收源基站发送的全部PDU，并在终端基于切换命令完成切换之后，将目标PDU set所属的全部PDU发送给终端，完成这一目标PDU set的下行传输。
在一个实施例中，若目标PDU set为下行数据，该下行数据的发送端为源基站；以目标PDU set为XR数据帧为例，源基站可以在基于终端测量报告，确定终端处于小区变更的情况下，向目标基站发送切换请求，目标基站接收到切换请求后可以向源基站发送切换请求确认信息，触发源基站向终端发送切换命令；如果属于同一个数据帧的PDU(称为一个PDU组)没有全部发送给终端，则源基站可以将该PDU组的全部PDU都转发给目标基站(即将包含该PDU的SDAP SDU转发给目标基站)，目标基站可以接收源基站发送的全部PDU，并在终端完成切换之后，将目标PDU set所属的全部PDU发送给终端，完成这一下行传输。
可选地，目标PDU set为上行数据，目标通信设备为终端；
确定终端处于小区变更，包括：
接收源基站发送的切换命令；
基于切换命令，确定从源基站断开，接入目标基站；
在目标基站传输目标PDU set所属的全部PDU，包括：
在所述终端完成切换，接入所述目标基站之后，向目标基站发送目标PDU set所属的全部PDU。
可选地，若目标PDU set为上行数据，该上行数据的发送端为终端；为了实现在目标基站传输目标PDU set所属的全部PDU，终端可以在接收到源基站发送的切换命令之后，执行切换，若存在属于同一个目标PDU set的PDU(称为一个PDU组)没有全部发送给源基站，则在完成切换之后，将 该PDU组的全部PDU都发送给目标基站。
在一个实施例中，若目标PDU set为上行数据，该上行数据的发送端为终端；源基站在确定终端可以切换至目标基站的情况下向终端发送切换命令，执行切换过程。
终端在接收到源基站的切换命令之后，如果属于同一个目标PDU set的PDU(称为一个PDU组)没有全部发送给源基站，则可以在完成切换之后，将该PDU组的全部PDU都发送给目标基站。
目标基站可以执行与终端的切换过程，且在切换完成之后，接收终端发送的上行数据。
其中，基站可以预先为终端配置可以执行PDU重传操作的DRB ID或QoS flow ID。
可选地，目标PDU set的传输处理方式，包括：
在目标基站传输第一数据包；第一数据包包括目标PDU set中未向通信对端发送的PDU和/或未成功发送给通信对端的PDU。
可选地，目标通信设备是源基站的情况下，该源基站的通信对端为终端；
可选地，目标通信设备是目标基站的情况下，该目标基站的通信对端为终端；
可选地，目标通信设备是终端的情况下，该终端在切换前的通信对端为源基站。
可选地，所述目标PDU set中未向通信对端发送的PDU和/或未成功发送给通信对端的PDU，可以指：在终端切换之前，目标PDU set中未向通信对端发送的PDU和/或未成功发送给通信对端的PDU。
可选地，所述方法还包括：执行目标PDU set的传输处理方式，即所述方法还包括：在目标基站传输第一数据包；第一数据包包括目标PDU set中未向通信对端发送的PDU和/或未成功发送给通信对端的PDU。
可选地，可以确定目标PDU set的传输处理方式，包括：在目标基站传输第一数据包；
可选地，第一数据包可以包括以下任意一项或多项：
目标PDU set中未向通信对端发送的PDU；或
未成功发送给通信对端的PDU。
可选地，可以在目标PDU set的传输性能需求为高可靠性的情况下，为了保证终端切换导致目标PDU set中存在第一数据包，即导致目标PDU set中存在未向通信对端发送的PDU和/或未成功发送给通信对端的PDU，则可以在目标基站传输第一数据包，保证第一数据包传输的正确率。
本公开实施例中，如果存在在源基站部分PDU发生传输错误的情况，发送端可以在目标基站重传发生传输错误的PDU；提高第一数据包传输的正确率，且由于不用重传所有的PDU，节省资源。
可选地，目标PDU set为下行数据，目标通信设备为源基站；
确定终端处于小区变更，包括：
在源基站向终端发送条件切换配置之后，接收目标基站发送的切换成功消息；
在目标基站传输第一数据包，包括：
在源基站接收到切换成功消息之后，向目标基站发送第一数据包。
可选地，若目标PDU set为下行数据，该下行数据的发送端为源基站；为了实现在目标基站传输第一数据包，源基站可以在向终端发送条件切换配置之后，接收到目标基站发送的切换成功消息的情况下，确定终端处于小区变更，则可以向目标基站发送第一数据包，以使目标基站接收到第一数据包之后，将第一数据包发送给终端，进而保障目标PDU set中的所有PDU均被成功发送。
可选地，若目标PDU set为下行数据，该下行数据的发送端为源基站；源基站可以在接收到目标基站发送的切换成功消息后(条件小区变更)：如果确定一个PDU组的PDU没有全部发送给终端，且部分PDU没有传输成功(判断依据为基站向终端发送包含该PDU的MAC PDU之后，没有收到终端的HARQ ARQ反馈)，则源基站将包含上述2类没有传输成功的PDU的SDAP SDU转发给目标基站，由目标基站向终端发送。
可选地，目标PDU set为下行数据，目标通信设备为目标基站；
确定终端处于小区变更，包括：
在所述终端完成切换，接入所述目标基站的情况下之后，向源基站发送切换成功消息；
在目标基站传输第一数据包，包括：
接收源基站发送的第一数据包；
向终端发送第一数据包。
可选地，若目标PDU set为下行数据，该下行数据的发送端为源基站；为了实现在目标基站传输第一数据包，目标基站可以在终端满足切换条件切换成功之后，向源基站发送切换成功消息，源基站可以在接收到目标基站发送的切换成功消息的情况下，确定终端处于小区变更，则可以向目标基站发送第一数据包，目标基站接收到第一数据包之后，可以将第一数据包发送给终端，进而保障目标PDU set中的所有PDU均被成功发送。
在一个实施例中，若目标PDU set为下行数据，该下行数据的发送端为源基站；以目标PDU set为XR数据帧为例，源基站可以向终端发送目标小区配置和切换条件，终端接收源基站的条件切换配置，包括目标小区配置和条件切换的触发条件；终端可以在满足条件切换的触发条件之后，向目标基站发起切换过程，目标基站在确定终端切换完成之后，向源基站发送切换成功消息，源基站可以在接收到目标基站发送的切换成功消息的情况下，确定终端处于小区变更，且源基站的所有待发送数据中，如果一个PDU组的PDU没有全部发送给终端，且部分PDU没有传输成功(判断依据为基站向终端发送包含该PDU的MAC PDU之后，没有收到终端的HARQ ARQ反馈)，则源基站将包含上述2种没有传输成功的PDU的SDAP SDU(第一数据包)转发给目标基站，目标基站接收到第一数据包之后，可以将第一数据包发送给终端。
可选地，目标PDU set为下行数据，目标通信设备为源基站；
确定终端处于小区变更，包括：
基于终端测量报告，确定向终端发送切换命令；
在目标基站传输第一数据包，包括：
在确定向终端发送切换命令的情况下，向目标基站发送第一数据包。
可选地，若目标PDU set为下行数据，该下行数据的发送端为源基站；为了实现在目标基站传输第一数据包，源基站可以在基于终端测量报告，确定向终端发送切换命令的情况下，确定终端处于小区变更，则可以向目标基站发送第一数据包，以使目标基站接收到第一数据包之后，将第一数据包发送给终端，进而保障目标PDU set中的所有PDU均被成功发送。
可选地，若目标PDU set为下行数据，该下行数据的发送端为源基站；源基站可以在基于终端测量报告，确定向终端发送切换命令的情况下(常规小区变更)：如果确定一个PDU组的PDU没有全部发送给终端，且部分PDU没有传输成功(判断依据为基站向终端发送包含该PDU的MAC PDU之后，没有收到终端的HARQ ARQ反馈)，则源基站将包含上述2类没有传输成功的PDU的SDAP SDU转发给目标基站，由目标基站向终端发送。
可选地，目标PDU set为下行数据，目标通信设备为目标基站；
确定终端处于小区变更，包括：
接收源基站发送的切换请求；
向源基站发送切换请求确认信息，切换请求确认信息用于触发源基站向终端发送切换命令；
在目标基站传输第一数据包，包括：
接收源基站发送的第一数据包；
在终端完成切换之后，向终端发送第一数据包。
可选地，若目标PDU set为下行数据，该下行数据的发送端为源基站；为了实现在目标基站传输第一数据包，源基站可以在基于终端测量报告，确定向终端发送切换命令的情况下，确定终端处于小区变更，则源基站可以向目标基站发送第一数据包，目标基站接收到第一数据包之后，可以将第一数据包发送给终端，进而保障目标PDU set中的所有PDU均被成功发送。
在一个实施例中，若目标PDU set为下行数据，该下行数据的发送端为源基站；以目标PDU set为XR数据帧为例，终端侧可以根据源基站的测量 配置执行测量上报；源基站可以在接收到终端测量报告，并基于终端测量报告决定发起终端切换过程，即确定向终端发送切换命令的情况下，确定终端处于小区变更，且源基站的所有待发送数据中，如果一个PDU组的PDU没有全部发送给终端，且部分PDU没有传输成功(判断依据为基站向终端发送包含该PDU的MAC PDU之后，没有收到终端的HARQ ARQ反馈)，则源基站将包含上述2种没有传输成功的PDU的SDAP SDU(第一数据包)转发给目标基站，目标基站可以接收第一数据包，在终端基于切换命令切换至目标基站之后，目标基站可以将第一数据包发送给终端。终端在接收到第一数据包后，可以基于第一数据包和切换之前从源基站接收到的PDU，实现目标PDU set的正确解析。
可选地，目标PDU set为上行数据，目标通信设备为终端；
确定终端处于小区变更，包括：
接收源基站发送的切换命令；
基于切换命令，确定从源基站断开，接入目标基站；
在目标基站传输第一数据包，包括：
在所述终端完成切换，接入目标基站之后，向目标基站发送第一数据包。
可选地，若目标PDU set为上行数据，该上行数据的发送端为终端；为了实现在目标基站传输第一数据包，终端可以在接收到源基站发送的切换命令之后，执行切换，若存在一个PDU组的PDU没有全部发送给源基站，且部分PDU没有传输成功(判断依据为终端向基站发送包含该PDU的MAC PDU之后，没有收到基站的HARQ ARQ反馈)的情况，则终端在完成切换之后，将包含上述2类没有传输成功的PDU(第一数据包)的SDAP SDU重新发送给目标基站。
在一个实施例中，若目标PDU set为上行数据，该上行数据的发送端为终端；源基站在确定终端可以切换至目标基站的情况下向终端发送切换命令，执行切换过程。
终端在接收到源基站的切换命令之后，如果一个PDU组的PDU没有全 部发送给源基站，且部分PDU没有传输成功(判断依据为终端向基站发送包含该PDU的MAC PDU之后，没有收到基站的HARQ ARQ反馈)，则终端在完成切换之后，将包含没有传输成功的PDU的SDAP SDU重新发送给目标基站。
目标基站可以执行与终端的切换过程，且在切换完成之后，接收终端发送的第一数据包。
其中，基站可以预先为终端配置可以执行PDU重传操作的DRB ID或QoS flow ID。
可选地，目标PDU set为上行数据，目标通信设备为终端；
确定终端处于小区变更，包括：
基于目标小区配置和切换条件，确定终端处于条件切换的场景，在满足切换条件的情况下接入目标基站；
在目标基站传输第一数据包，包括：
在所述终端完成切换，接入所述目标基站之后，向目标基站发送第一数据包。
可选地，若目标PDU set为上行数据，该上行数据的发送端为终端；为了实现在目标基站传输第一数据包，终端可以基于目标小区配置和切换条件，确定终端处于条件切换的场景，在满足切换条件的情况下接入目标基站，若存在一个PDU组的PDU没有全部发送给源基站，且部分PDU没有传输成功(判断依据为终端向基站发送包含该PDU的MAC PDU之后，没有收到基站的HARQ ARQ反馈)的情况，则终端在完成切换之后，将包含上述2类没有传输成功的PDU(第一数据包)的SDAP SDU重新发送给目标基站。
在一个实施例中，若目标PDU set为上行数据，该上行数据的发送端为终端；以目标PDU set为XR数据帧为例，源基站可以向终端发送目标小区配置和切换条件，终端接收源基站的条件切换配置，包括目标小区配置和条件切换的触发条件；终端可以在满足条件切换的触发条件之后，向目标基站发起切换过程，如果一个PDU组的PDU没有全部发送给源基站，且部分 PDU没有传输成功(判断依据为终端向基站发送包含该PDU的MAC PDU之后，没有收到基站的HARQ ARQ反馈)，则终端在完成切换之后，将包含没有传输成功的PDU的SDAP SDU重新发送给目标基站。
目标基站可以执行与终端的切换过程，且在切换完成之后，接收终端发送的第一数据包。
其中，基站可以预先为终端配置可以执行PDU重传操作的DRB ID或QoS flow ID。
可选地，目标PDU set的传输处理方式，包括：
丢弃第二数据包；
第二数据包为目标PDU set中未向通信对端发送的PDU和/或未成功发送给通信对端的PDU。
可选地，可以确定目标PDU set的传输处理方式，包括：丢弃第二数据包；其中，第二数据包为目标PDU set中未向通信对端发送的PDU和/或未成功发送给通信对端的PDU。
可选地，第一数据包可以包括以下任意一项或多项：
目标PDU set中未向通信对端发送的PDU；或
未成功发送给通信对端的PDU。
可选地，所述方法还包括：执行目标PDU set的传输处理方式，即所述方法还包括：丢弃第二数据包；第二数据包为目标PDU set中未向通信对端发送的PDU和/或未成功发送给通信对端的PDU。
可选地，可以在目标PDU set的传输性能需求为低时延的情况下，如果在发送端的部分PDU发生传输错误，发送端可以丢弃剩余PDU和/或错误PDU，不再继续传输，也不再重复传输错误的PDU。
本公开实施例中，对于时延要求高的XR业务，在部分PDU丢弃时，可以节约空口资源开销。
本公开实施例适用于时延要求高的业务，可以在确定该XR数据帧不能成功传输的情况下，放弃不必要的空口数据传输，节约空口资源。
可选地，目标PDU set为下行数据，目标通信设备为源基站；
确定终端处于小区变更，包括：
在源基站向终端发送条件切换配置之后，接收目标基站发送的切换成功消息；
丢弃第二数据包，包括：
在源基站接收到切换成功消息之后，丢弃第二数据包。
可选地，若目标PDU set为下行数据，该下行数据的发送端为源基站；在丢弃第二数据包之前，目标基站可以在终端满足切换条件切换成功之后，向源基站发送切换成功消息，源基站可以在接收到目标基站发送的切换成功消息的情况下，确定终端处于小区变更，则可以丢弃第二数据包，不转发给目标基站。
本公开实施例适用于时延要求高的业务，可以在确定该XR数据帧不能成功传输的情况下，放弃不必要的空口数据传输，节约空口资源。
在一个实施例中，若目标PDU set为下行数据，该下行数据的发送端为源基站；以目标PDU set为XR数据帧为例，源基站可以向终端发送目标小区配置和切换条件，终端接收源基站的条件切换配置，包括目标小区配置和条件切换的触发条件；终端可以在满足条件切换的触发条件之后，向目标基站发起切换过程，目标基站在确定终端切换完成之后，向源基站发送切换成功消息，源基站可以在接收到目标基站发送的切换成功消息的情况下，确定终端处于小区变更，且源基站的所有待发送数据中，如果一个PDU组的PDU没有全部发送给终端，且部分PDU没有传输成功(判断依据为基站向终端发送包含该PDU的MAC PDU之后，没有收到终端的HARQ ARQ反馈)，则源基站将该PDU组的其他PDU(即第二数据包)丢弃，不转发给目标基站。
可选地，目标PDU set为下行数据，目标通信设备为源基站；
确定终端处于小区变更，包括：
基于终端测量报告，确定向终端发送切换命令；
丢弃第二数据包，包括：
在确定向终端发送切换命令的情况下，丢弃第二数据包。
可选地，若目标PDU set为下行数据，该下行数据的发送端为源基站；在丢弃第二数据包之前，源基站可以在基于终端测量报告，确定向终端发送切换命令的情况下，确定终端处于小区变更，则可以丢弃第二数据包。
可选地，若目标PDU set为下行数据，该下行数据的发送端为源基站；源基站可以在基于终端测量报告，确定向终端发送切换命令的情况下(常规小区变更)：如果确定一个PDU组的PDU没有全部发送给终端，且部分PDU没有传输成功(判断依据为基站向终端发送包含该PDU的MAC PDU之后，没有收到终端的HARQ ARQ反馈)，则源基站将包含上述2类没有传输成功的PDU丢弃，不转发给目标基站。
本公开实施例适用于时延要求高的业务，可以在确定该XR数据帧不能成功传输的情况下，放弃不必要的空口数据传输，节约空口资源。
可选地，目标PDU set为上行数据，目标通信设备为终端；
确定终端处于小区变更，包括：
接收源基站发送的切换命令；
基于切换命令，确定从源基站断开，接入目标基站；
丢弃第二数据包，包括：
在接收到切换命令之后，丢弃第二数据包。
可选地，若目标PDU set为上行数据，该上行数据的发送端为终端；为了实现在目标基站传输第一数据包，终端可以在接收到源基站发送的切换命令之后，执行切换，若存在一个PDU组的PDU没有全部发送给源基站，且部分PDU没有传输成功(判断依据为终端向基站发送包含该PDU的MAC PDU之后，没有收到基站的HARQ ARQ反馈)的情况，则终端在发起切换时，将该PDU组的其他PDU丢弃，不发送给目标基站。
在一个实施例中，若目标PDU set为上行数据，该上行数据的发送端为终端；源基站在确定终端可以切换至目标基站的情况下向终端发送切换命令，执行切换过程。
终端在接收到源基站的切换命令之后，如果一个PDU组的PDU没有全部发送给源基站，且部分PDU没有传输成功(判断依据为终端向基站发送 包含该PDU的MAC PDU之后，没有收到基站的HARQ ARQ反馈)，则终端在发起切换时，将该PDU组的其他PDU丢弃，不发送给目标基站。
需要说明的是：基站可以预先为终端配置可以执行PDU丢弃操作的DRB ID或QoS flow ID。
可选地，目标PDU set为上行数据，目标通信设备为终端；
确定终端处于小区变更，包括：
基于目标小区配置和切换条件，确定终端处于条件切换的场景，在满足切换条件的情况下接入目标基站；
丢弃第二数据包，包括：
在确定满足切换条件之后，丢弃第二数据包。
可选地，若目标PDU set为上行数据，该上行数据的发送端为终端；为了实现在目标基站传输第一数据包，终端可以基于目标小区配置和切换条件，确定终端处于条件切换的场景，在满足切换条件的情况下接入目标基站，若存在一个PDU组的PDU没有全部发送给源基站，且部分PDU没有传输成功(判断依据为终端向基站发送包含该PDU的MAC PDU之后，没有收到基站的HARQ ARQ反馈)的情况，则终端在发起切换时，将该PDU组的其他PDU丢弃，不发送给目标基站。
在一个实施例中，若目标PDU set为上行数据，该上行数据的发送端为终端；以目标PDU set为XR数据帧为例，源基站可以向终端发送目标小区配置和切换条件，终端接收源基站的条件切换配置，包括目标小区配置和条件切换的触发条件；终端可以在满足条件切换的触发条件之后，向目标基站发起切换过程，如果一个PDU组的PDU没有全部发送给源基站，且部分PDU没有传输成功(判断依据为终端向基站发送包含该PDU的MAC PDU之后，没有收到基站的HARQ ARQ反馈)，则终端在发起切换时，将该PDU组的其他PDU丢弃，不发送给目标基站。
其中，基站可以预先为终端配置可以执行PDU丢弃操作的DRB ID或QoS flow ID。
可选地，目标PDU set为上行数据，目标通信设备为源基站或目标基 站；
方法还包括：
向终端发送目标PDU set的标识，标识用于指示使用传输处理方式的目标PDU set。
可选地，源基站或目标基站可以预先通过目标PDU set的标识(比如DRB ID或QoS flow ID)，来指示该目标PDU set可以被重传；
可选地，源基站或目标基站可以预先通过目标PDU set的标识(DRB ID或QoS flow ID)，来指示该目标PDU set可以被丢弃。
本公开实施例提供的数据传输方法，通过在确定终端处于小区变更的情况下，确定存在未完全传输成功的目标PDU set；进而确定目标PDU set的传输处理方式，保障目标PDU set传输的正确率，节省资源。
本公开实施例提供的数据传输方法，执行主体可以为数据传输装置。本公开实施例中以数据传输装置执行数据传输方法为例，说明本公开实施例提供的数据传输装置。
图6是本公开实施例提供的数据传输装置的结构示意图，如图6所示，该数据传输装置可以包括：第一确定模块610和第二确定模块620；其中：
第一确定模块610用于在确定终端处于小区变更的情况下，确定存在未完全传输成功的目标PDU set；所述未完全传输成功的目标PDU set所属的全部或部分PDU没有被发送或者没有被成功发送；
第二确定模块620用于确定所述目标PDU set的传输处理方式。
本公开实施例提供的数据传输装置，通过在确定终端处于小区变更的情况下，确定存在未完全传输成功的目标PDU set；进而确定所述目标PDU set的传输处理方式，保障目标PDU set传输的正确率，节省资源。
可选地，数据传输装置还包括：
第一执行模块，用于执行所述目标PDU set的传输处理方式，第一执行模块具体用于：
在源基站传输完成所述目标PDU set所属的全部PDU，所述源基站为所述终端切换之前接入的基站。
可选地，所述目标PDU set为下行数据，所述目标通信设备为源基站；
所述第一确定模块610具体用于：
基于终端测量报告，确定向所述终端发送切换命令；
所述第一执行模块具体用于：
在向所述终端发送切换命令之前，向所述终端发送所述目标PDU set所属的全部PDU。
可选地，所述目标PDU set为上行数据，所述目标通信设备为终端；
所述第一确定模块610具体用于：
接收源基站发送的切换命令；
基于所述切换命令，确定从源基站断开，接入目标基站，所述目标基站为所述终端完成切换之后接入的基站；
所述第一执行模块具体用于：
在从所述源基站断开之前，向所述源基站发送所述目标PDU set所属的全部PDU。
可选地，所述目标PDU set所属的全部PDU中的最后一个上行传输的PDU中包括终止标志，所述终止标志用于表征所述PDU为所述目标PDU set所属的全部PDU中的最后一个PDU。
可选地，数据传输装置还包括：
第二执行模块，用于执行所述目标PDU set的传输处理方式，第二执行模块具体用于：
在目标基站传输完成所述目标PDU set所属的全部PDU。
可选地，所述目标PDU set为下行数据，所述目标通信设备为源基站；
所述第一确定模块610具体用于：
基于终端测量报告，确定向所述终端发送切换命令；
所述第二执行模块具体用于：
在所述确定向所述终端发送切换命令的情况下，向目标基站发送所述目标PDU set所属的全部PDU。
可选地，所述目标PDU set为下行数据，所述目标通信设备为目标基 站；
所述第一确定模块610具体用于：
接收源基站发送的切换请求；
向所述源基站发送切换请求确认信息，所述切换请求确认信息用于触发所述源基站向所述终端发送切换命令；
所述第二执行模块具体用于：
接收所述源基站发送的所述目标PDU set所属的全部PDU；
在所述终端完成切换之后，向所述终端发送所述目标PDU set所属的全部PDU。
可选地，所述目标PDU set为上行数据，所述目标通信设备为终端；
所述第一确定模块610具体用于：
接收源基站发送的切换命令；
基于所述切换命令，确定从所述源基站断开，接入目标基站；
所述第二执行模块具体用于：
在所述终端完成切换，接入所述目标基站之后，向所述目标基站发送所述目标PDU set所属的全部PDU。
可选地，数据传输装置还包括：
第三执行模块，用于执行所述目标PDU set的传输处理方式，第三执行模块具体用于：
在目标基站传输第一数据包；所述第一数据包包括所述目标PDU set中未向通信对端发送的PDU和/或未成功发送给通信对端的PDU。
可选地，所述目标PDU set为下行数据，所述目标通信设备为源基站；
所述第一确定模块610具体用于：
在所述源基站向终端发送条件切换配置之后，接收目标基站发送的切换成功消息；
所述第三执行模块具体用于：
在所述源基站接收到所述切换成功消息之后，向所述目标基站发送所述第一数据包。
可选地，所述目标PDU set为下行数据，所述目标通信设备为目标基站；
所述第一确定模块610具体用于：
在所述终端完成切换，接入所述目标基站之后，向源基站发送切换成功消息；
所述第三执行模块具体用于：
接收所述源基站发送的所述第一数据包；
向所述终端发送所述第一数据包。
可选地，所述目标PDU set为下行数据，所述目标通信设备为源基站；
所述第一确定模块610具体用于：
基于终端测量报告，确定向终端发送切换命令；
所述第三执行模块具体用于：
在确定向所述终端发送所述切换命令的情况下，向所述目标基站发送所述第一数据包。
可选地，所述目标PDU set为下行数据，所述目标通信设备为目标基站；
所述第一确定模块610具体用于：
接收源基站发送的切换请求；
向所述源基站发送切换请求确认信息，所述切换请求确认信息用于触发所述源基站向所述终端发送切换命令；
所述第三执行模块具体用于：
接收所述源基站发送的所述第一数据包；
在所述终端完成切换之后，向所述终端发送所述第一数据包。
可选地，所述目标PDU set为上行数据，所述目标通信设备为终端；
所述第一确定模块610具体用于：
接收源基站发送的切换命令；
基于所述切换命令，确定从所述源基站断开，接入所述目标基站；
所述第三执行模块具体用于：
在所述终端完成切换，接入所述目标基站之后，向所述目标基站发送所述第一数据包。
可选地，所述目标PDU set为上行数据，所述目标通信设备为终端；
所述第一确定模块610具体用于：
基于目标小区配置和切换条件，确定终端处于条件切换的场景，在满足所述切换条件的情况下接入所述目标基站；
所述第三执行模块具体用于：
在所述终端完成切换，接入所述目标基站之后，向所述目标基站发送所述第一数据包。
可选地，数据传输装置还包括：
第四执行模块，用于执行所述目标PDU set的传输处理方式，第四执行模块具体用于：
丢弃第二数据包；
所述第二数据包为所述目标PDU set中未向通信对端发送的PDU和/或未成功发送给通信对端的PDU。
可选地，所述目标PDU set为下行数据，所述目标通信设备为源基站；
所述第一确定模块610具体用于：
在所述源基站向所述终端发送条件切换配置之后，接收目标基站发送的切换成功消息；
所述第四执行模块具体用于：
在所述源基站接收到所述切换成功消息之后，丢弃所述第二数据包。
可选地，所述目标PDU set为下行数据，所述目标通信设备为源基站；
所述第一确定模块610具体用于：
基于终端测量报告，确定向终端发送切换命令；
所述第四执行模块具体用于：
在确定向所述终端发送所述切换命令的情况下，丢弃第二数据包。
可选地，所述目标PDU set为上行数据，所述目标通信设备为终端；
所述第一确定模块610具体用于：
接收源基站发送的切换命令；
基于所述切换命令，确定从所述源基站断开，接入目标基站；
所述第四执行模块具体用于：
在接收到所述切换命令之后，丢弃所述第二数据包。
可选地，所述目标PDU set为上行数据，所述目标通信设备为终端；
所述第一确定模块610具体用于：
基于目标小区配置和切换条件，确定终端处于条件切换的场景，在满足所述切换条件的情况下接入目标基站；
所述第四执行模块具体用于：
在确定满足所述切换条件之后，丢弃所述第二数据包。
可选地，所述目标PDU set为上行数据，所述目标通信设备为源基站或目标基站；
所述装置还包括：
第一发送模块，用于向所述终端发送所述目标PDU set的标识，所述标识用于指示使用所述传输处理方式的所述目标PDU set。
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现有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，本发明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。
可选地，目标通信设备可以是终端；
图7是本公开实施例提供的一种终端的结构示意图，如图7所示，所述终端包括存储器720，收发机700，处理器710，其中：
存储器720，用于存储计算机程序；收发机700，用于在所述处理器710的控制下收发数据；处理器710，用于读取所述存储器720中的计算机程序并执行以下操作：
在确定终端处于小区变更的情况下，确定存在未完全传输成功的目标PDU set；所述未完全传输成功的目标PDU set所属的全部或部分PDU没有被发送或者没有被成功发送；
确定所述目标PDU set的传输处理方式。
具体地，收发机700，用于在处理器710的控制下接收和发送数据。
其中，在图7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710代表的一个或多个处理器和存储器720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，本文不再对其进行进一步描述。总线接口提供接口。收发机700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730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710负责管理总线架构和通常的处理，存储器720可以存储处理器710在执行操作时所使用的数据。
可选的，处理器710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。
处理器通过调用存储器存储的计算机程序，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。处理器与存储器也可以物理上分开布置。
可选地，处理器710还用于执行所述目标PDU set的传输处理方式，处理器710具体还用于：
在源基站传输完成所述目标PDU set所属的全部PDU。
可选地，所述目标PDU set为上行数据，所述目标通信设备为终端；
处理器710具体用于：
接收源基站发送的切换命令；
基于所述切换命令，确定从源基站断开，接入目标基站，所述目标基站为所述终端完成切换之后接入的基站；
处理器710具体还用于：
在从所述源基站断开之前，向所述源基站发送所述目标PDU set所属的全部PDU。
可选地，所述目标PDU set所属的全部PDU中的最后一个上行传输的PDU中包括终止标志，所述终止标志用于表征所述PDU为所述目标PDU set所属的全部PDU中的最后一个PDU。
可选地，处理器710还用于执行所述目标PDU set的传输处理方式，处理器710具体还用于：
在目标基站传输完成所述目标PDU set所属的全部PDU。
可选地，所述目标PDU set为上行数据，所述目标通信设备为终端；
处理器710具体用于：
接收源基站发送的切换命令；
基于所述切换命令，确定从所述源基站断开，接入目标基站；
处理器710具体还用于：
在所述终端完成切换，接入所述目标基站之后，向所述目标基站发送所述目标PDU set所属的全部PDU。
可选地，处理器710还用于执行所述目标PDU set的传输处理方式，处理器710具体还用于：
在目标基站传输第一数据包；所述第一数据包包括所述目标PDU set中未向通信对端发送的PDU和/或未成功发送给通信对端的PDU。
可选地，所述目标PDU set为上行数据，所述目标通信设备为终端；
处理器710具体用于：
接收源基站发送的切换命令；
基于所述切换命令，确定从所述源基站断开，接入所述目标基站；
处理器710具体还用于：
在所述终端完成切换，接入所述目标基站之后，向所述目标基站发送所述第一数据包。
可选地，所述目标PDU set为上行数据，所述目标通信设备为终端；
处理器710具体用于：
基于目标小区配置和切换条件，确定终端处于条件切换的场景，在满足所述切换条件的情况下接入所述目标基站；
处理器710具体还用于：
在所述终端完成切换，接入所述目标基站之后，向所述目标基站发送所述第一数据包。
可选地，处理器710还用于执行所述目标PDU set的传输处理方式，处理器710具体还用于：
丢弃第二数据包；
所述第二数据包为所述目标PDU set中未向通信对端发送的PDU和/或未成功发送给通信对端的PDU。
可选地，所述目标PDU set为上行数据，所述目标通信设备为终端；
处理器710具体用于：
接收源基站发送的切换命令；
基于所述切换命令，确定从所述源基站断开，接入目标基站；
处理器710还用于：
在接收到所述切换命令之后，丢弃所述第二数据包。
可选地，所述目标PDU set为上行数据，所述目标通信设备为终端；
处理器710具体用于：
基于目标小区配置和切换条件，确定终端处于条件切换的场景，在满足所述切换条件的情况下接入目标基站；
处理器710还用于：
在确定满足所述切换条件之后，丢弃所述第二数据包。
在此需要说明的是，本发明实施例提供的上述终端，能够实现上述执行主体为终端的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。
可选地，目标通信设备可以是源基站；
图8是本公开实施例提供的一种源基站的结构示意图，如图8所示，所述源基站包括存储器820，收发机800，处理器810，其中：
存储器820，用于存储计算机程序；收发机800，用于在所述处理器810的控制下收发数据；处理器810，用于读取所述存储器820中的计算机程序并执行以下操作：
在确定终端处于小区变更的情况下，确定存在未完全传输成功的目标PDU set；所述未完全传输成功的目标PDU set所属的全部或部分PDU没有被发送或者没有被成功发送；
确定所述目标PDU set的传输处理方式。
具体地，收发机800，用于在处理器810的控制下接收和发送数据。
其中，在图8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810代表的一个或多个处理器和存储器820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，本文不 再对其进行进一步描述。总线接口提供接口。收发机800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810负责管理总线架构和通常的处理，存储器820可以存储处理器810在执行操作时所使用的数据。
处理器810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。
可选地，处理器810还用于执行所述目标PDU set的传输处理方式，处理器810具体还用于：
在源基站传输完成所述目标PDU set所属的全部PDU，所述源基站为所述终端切换之前接入的基站。
可选地，所述目标PDU set为下行数据，所述目标通信设备为源基站；
处理器810具体用于：
基于终端测量报告，确定向所述终端发送切换命令；
处理器810具体还用于：
在向所述终端发送切换命令之前，向所述终端发送所述目标PDU set所属的全部PDU。
可选地，处理器810还用于执行所述目标PDU set的传输处理方式，所述目标PDU set的传输处理方式包括：
在目标基站传输完成所述目标PDU set所属的全部PDU。
可选地，所述目标PDU set为下行数据，所述目标通信设备为源基站；
处理器810具体用于：
基于终端测量报告，确定向所述终端发送切换命令；
处理器810具体还用于：
在所述确定向所述终端发送切换命令的情况下，向目标基站发送所述目 标PDU set所属的全部PDU。
可选地，处理器810还用于执行所述目标PDU set的传输处理方式，处理器810具体还用于：
在目标基站传输第一数据包；所述第一数据包包括所述目标PDU set中未向通信对端发送的PDU和/或未成功发送给通信对端的PDU。
可选地，所述目标PDU set为下行数据，所述目标通信设备为源基站；
处理器810具体用于：
在所述源基站向终端发送条件切换配置之后，接收目标基站发送的切换成功消息；
处理器810具体还用于：
在所述源基站接收到所述切换成功消息之后，向所述目标基站发送所述第一数据包。
可选地，所述目标PDU set为下行数据，所述目标通信设备为源基站；
处理器810具体用于：
基于终端测量报告，确定向终端发送切换命令；
处理器810具体还用于：
在确定向所述终端发送所述切换命令的情况下，向所述目标基站发送所述第一数据包。
可选地，处理器810还用于执行所述目标PDU set的传输处理方式，处理器810具体还用于：
丢弃第二数据包；
所述第二数据包为所述目标PDU set中未向通信对端发送的PDU和/或未成功发送给通信对端的PDU。
可选地，所述目标PDU set为下行数据，所述目标通信设备为源基站；
处理器810具体用于：
在所述源基站向所述终端发送条件切换配置之后，接收目标基站发送的切换成功消息；
处理器810具体还用于：
在所述源基站接收到所述切换成功消息之后，丢弃所述第二数据包。
可选地，所述目标PDU set为下行数据，所述目标通信设备为源基站；
处理器810具体用于：
基于终端测量报告，确定向终端发送切换命令；
处理器810具体还用于：
在确定向所述终端发送所述切换命令的情况下，丢弃第二数据包。
可选地，所述目标PDU set为上行数据，所述目标通信设备为源基站；
处理器810还用于：
向所述终端发送所述目标PDU set的标识，所述标识用于指示使用所述传输处理方式的所述目标PDU set。
在此需要说明的是，本公开实施例提供的上述源基站，能够实现上述执行主体为源基站的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。
可选地，目标通信设备可以为目标基站；
图9是本公开实施例提供的一种目标基站的结构示意图，如图9所示，所述目标基站包括存储器920，收发机900，处理器910，其中：
存储器920，用于存储计算机程序；收发机900，用于在所述处理器910的控制下收发数据；处理器910，用于读取所述存储器920中的计算机程序并执行以下操作：
在确定终端处于小区变更的情况下，确定存在未完全传输成功的目标PDU set；所述未完全传输成功的目标PDU set所属的全部PDU或部分PDU没有被发送或者没有被成功发送；
确定所述目标PDU set的传输处理方式。
具体地，收发机900，用于在处理器910的控制下接收和发送数据。
其中，在图9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910代表的一个或多个处理器和存储器920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，本文不再对其进行进一步描述。总线接口提供接口。收发机900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910负责管理总线架构和通常的处理，存储器920可以存储处理器910在执行操作时所使用的数据。
处理器910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。
可选地，处理器910还用于执行所述目标PDU set的传输处理方式，处理器910具体还用于：
在目标基站传输完成所述目标PDU set所属的全部PDU。
可选地，所述目标PDU set为下行数据，所述目标通信设备为目标基站；
处理器910具体用于：
接收源基站发送的切换请求；
向所述源基站发送切换请求确认信息，所述切换请求确认信息用于触发所述源基站向所述终端发送切换命令；
处理器910具体还用于：
接收所述源基站发送的所述目标PDU set所属的全部PDU；
在所述终端完成切换之后，向所述终端发送所述目标PDU set所属的全部PDU。
可选地，处理器910还用于执行所述目标PDU set的传输处理方式，处理器910具体还用于：
在目标基站传输第一数据包；所述第一数据包包括所述目标PDU set中未向通信对端发送的PDU和/或未成功发送给通信对端的PDU。
可选地，所述目标PDU set为下行数据，所述目标通信设备为目标基站；
处理器910具体用于：
在所述终端完成切换，接入所述目标基站之后，向源基站发送切换成功消息；
处理器910具体还用于：
接收所述源基站发送的所述第一数据包；
向所述终端发送所述第一数据包。
可选地，所述目标PDU set为下行数据，所述目标通信设备为目标基站；
处理器910具体用于：
接收源基站发送的切换请求；
向所述源基站发送切换请求确认信息，所述切换请求确认信息用于触发所述源基站向所述终端发送切换命令；
处理器910具体还用于：
接收所述源基站发送的所述第一数据包；
在所述终端完成切换之后，向所述终端发送所述第一数据包。
可选地，所述目标PDU set为上行数据，所述目标通信设备为目标基站；
处理器910还用于：
向所述终端发送所述目标PDU set的标识，所述标识用于指示使用所述传输处理方式的所述目标PDU set。
在此需要说明的是，本公开实施例提供的上述目标基站，能够实现上述执行主体为目标基站的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 述各实施例提供的方法，包括：
在确定终端处于小区变更的情况下，确定存在未完全传输成功的目标PDU set；所述未完全传输成功的目标PDU set所属的全部或部分PDU没有被发送或者没有被成功发送；
确定所述目标PDU set的传输处理方式。
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 (67)

  1. 一种数据传输方法，其特征在于，应用于目标通信设备，包括：
    在确定终端处于小区变更的情况下，确定存在未完全传输成功的目标分组数据单元集合PDU set；所述未完全传输成功的目标PDU set所属的全部或部分PDU没有被发送或者没有被成功发送；
    确定所述目标PDU set的传输处理方式。
  2. 根据权利要求1所述的数据传输方法，其特征在于，所述目标PDU set的传输处理方式，包括：
    在源基站传输完成所述目标PDU set所属的全部PDU；所述源基站为所述终端切换之前接入的基站。
  3. 根据权利要求1-2任一项所述的数据传输方法，其特征在于，所述目标PDU set为下行数据，所述目标通信设备为源基站；
    所述确定终端处于小区变更，包括：
    基于终端测量报告，确定向所述终端发送切换命令；
    在源基站传输完成所述目标PDU set所属的全部PDU，包括：
    在向所述终端发送切换命令之前，向所述终端发送所述目标PDU set所属的全部PDU。
  4. 根据权利要求1-2任一项所述的数据传输方法，其特征在于，所述目标PDU set为上行数据，所述目标通信设备为终端；
    所述确定终端处于小区变更，包括：
    接收源基站发送的切换命令；
    基于所述切换命令，确定从所述源基站断开，接入目标基站，所述目标基站为所述终端完成切换之后接入的基站；
    在源基站传输完成所述目标PDU set所属的全部PDU，包括：
    在从所述源基站断开之前，向所述源基站发送所述目标PDU set所属的全部PDU。
  5. 根据权利要求4所述的数据传输方法，其特征在于，所述目标PDU set所属的全部PDU中的最后一个上行传输的PDU中包括终止标志，所述 终止标志用于表征所述PDU为所述目标PDU set所属的全部PDU中的最后一个PDU。
  6. 根据权利要求1所述的数据传输方法，其特征在于，所述目标PDU set的传输处理方式，包括：
    在目标基站传输完成所述目标PDU set所属的全部PDU。
  7. 根据权利要求1-6任一项所述的数据传输方法，其特征在于，所述目标PDU set为下行数据，所述目标通信设备为源基站；
    所述确定终端处于小区变更，包括：
    基于终端测量报告，确定向所述终端发送切换命令；
    在目标基站传输完成所述目标PDU set所属的全部PDU，包括：
    在所述确定向所述终端发送切换命令的情况下，向所述目标基站发送所述目标PDU set所属的全部PDU。
  8. 根据权利要求1-6任一项所述的数据传输方法，其特征在于，所述目标PDU set为下行数据，所述目标通信设备为目标基站；
    所述确定终端处于小区变更，包括：
    接收源基站发送的切换请求；
    向所述源基站发送切换请求确认信息，所述切换请求确认信息用于触发所述源基站向所述终端发送切换命令；
    所述在目标基站传输完成所述目标PDU set所属的全部PDU，包括：
    接收所述源基站发送的所述目标PDU set所属的全部PDU；
    在所述终端完成切换之后，向所述终端发送所述目标PDU set所属的全部PDU。
  9. 根据权利要求1-6任一项所述的数据传输方法，其特征在于，所述目标PDU set为上行数据，所述目标通信设备为终端；
    所述确定终端处于小区变更，包括：
    接收源基站发送的切换命令；
    基于所述切换命令，确定从所述源基站断开，接入目标基站；
    在目标基站传输完成所述目标PDU set所属的全部PDU，包括：
    在所述终端完成切换，接入所述目标基站之后，向所述目标基站发送所述目标PDU set所属的全部PDU。
  10. 根据权利要求1所述的数据传输方法，其特征在于，所述目标PDU set的传输处理方式，包括：
    在目标基站传输第一数据包；所述第一数据包包括所述目标PDU set中未向通信对端发送的PDU和/或未成功发送给通信对端的PDU。
  11. 根据权利要求1-10任一项所述的数据传输方法，其特征在于，所述目标PDU set为下行数据，所述目标通信设备为源基站；
    所述确定终端处于小区变更，包括：
    在所述源基站向终端发送条件切换配置之后，接收目标基站发送的切换成功消息；
    在目标基站传输第一数据包，包括：
    在所述源基站接收到所述切换成功消息之后，向所述目标基站发送所述第一数据包。
  12. 根据权利要求1-10任一项所述的数据传输方法，其特征在于，所述目标PDU set为下行数据，所述目标通信设备为目标基站；
    所述确定终端处于小区变更，包括：
    在所述终端完成切换，接入所述目标基站之后，向源基站发送切换成功消息；
    在目标基站传输第一数据包，包括：
    接收所述源基站发送的所述第一数据包；
    向所述终端发送所述第一数据包。
  13. 根据权利要求1-10任一项所述的数据传输方法，其特征在于，所述目标PDU set为下行数据，所述目标通信设备为源基站；
    所述确定终端处于小区变更，包括：
    基于终端测量报告，确定向终端发送切换命令；
    在目标基站传输第一数据包，包括：
    在确定向所述终端发送所述切换命令的情况下，向所述目标基站发送所 述第一数据包。
  14. 根据权利要求1-10任一项所述的数据传输方法，其特征在于，所述目标PDU set为下行数据，所述目标通信设备为目标基站；
    所述确定终端处于小区变更，包括：
    接收源基站发送的切换请求；
    向所述源基站发送切换请求确认信息，所述切换请求确认信息用于触发所述源基站向所述终端发送切换命令；
    在目标基站传输第一数据包，包括：
    接收所述源基站发送的所述第一数据包；
    在所述终端完成切换之后，向所述终端发送所述第一数据包。
  15. 根据权利要求1-10任一项所述的数据传输方法，其特征在于，所述目标PDU set为上行数据，所述目标通信设备为终端；
    所述确定终端处于小区变更，包括：
    接收源基站发送的切换命令；
    基于所述切换命令，确定从所述源基站断开，接入所述目标基站；
    在目标基站传输第一数据包，包括：
    在所述终端完成切换，接入所述目标基站之后，向所述目标基站发送所述第一数据包。
  16. 根据权利要求1-10任一项所述的数据传输方法，其特征在于，所述目标PDU set为上行数据，所述目标通信设备为终端；
    所述确定终端处于小区变更，包括：
    基于目标小区配置和切换条件，确定终端处于条件切换的场景，在满足所述切换条件的情况下接入所述目标基站；
    在目标基站传输第一数据包，包括：
    在所述终端完成切换，接入所述目标基站之后，向所述目标基站发送所述第一数据包。
  17. 根据权利要求1所述的数据传输方法，其特征在于，所述目标PDU set的传输处理方式，包括：
    丢弃第二数据包；
    所述第二数据包为所述目标PDU set中未向通信对端发送的PDU和/或未成功发送给通信对端的PDU。
  18. 根据权利要求1-17任一项所述的数据传输方法，其特征在于，所述目标PDU set为下行数据，所述目标通信设备为源基站；
    所述确定终端处于小区变更，包括：
    在所述源基站向所述终端发送条件切换配置之后，接收目标基站发送的切换成功消息；
    丢弃第二数据包，包括：
    在所述源基站接收到所述切换成功消息之后，丢弃所述第二数据包。
  19. 根据权利要求1-17任一项所述的数据传输方法，其特征在于，所述目标PDU set为下行数据，所述目标通信设备为源基站；
    所述确定终端处于小区变更，包括：
    基于终端测量报告，确定向终端发送切换命令；
    丢弃第二数据包，包括：
    在确定向所述终端发送所述切换命令的情况下，丢弃第二数据包。
  20. 根据权利要求1-17任一项所述的数据传输方法，其特征在于，所述目标PDU set为上行数据，所述目标通信设备为终端；
    所述确定终端处于小区变更，包括：
    接收源基站发送的切换命令；
    基于所述切换命令，确定从所述源基站断开，接入目标基站；
    丢弃第二数据包，包括：
    在接收到所述切换命令之后，丢弃所述第二数据包。
  21. 根据权利要求1-17任一项所述的数据传输方法，其特征在于，所述目标PDU set为上行数据，所述目标通信设备为终端；
    所述确定终端处于小区变更，包括：
    基于目标小区配置和切换条件，确定终端处于条件切换的场景，在满足所述切换条件的情况下接入目标基站；
    丢弃第二数据包，包括：
    在确定满足所述切换条件之后，丢弃所述第二数据包。
  22. 根据权利要求1-21任一项所述的数据传输方法，其特征在于，所述目标PDU set为上行数据，所述目标通信设备为源基站或目标基站；
    所述方法还包括：
    向所述终端发送所述目标PDU set的标识，所述标识用于指示使用所述传输处理方式的所述目标PDU set。
  23. 一种目标通信设备，其特征在于，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：
    在确定终端处于小区变更的情况下，确定存在未完全传输成功的目标PDU set；所述未完全传输成功的目标PDU set所属的全部或部分PDU没有被发送或者没有被成功发送；
    确定所述目标PDU set的传输处理方式。
  24. 根据权利要求23所述的目标通信设备，其特征在于，所述目标PDU set的传输处理方式，包括：
    在源基站传输完成所述目标PDU set所属的全部PDU，所述源基站为所述终端切换之前接入的基站。
  25. 根据权利要求23-24任一项所述的目标通信设备，其特征在于，所述目标PDU set为下行数据，所述目标通信设备为源基站；
    所述确定终端处于小区变更，包括：
    基于终端测量报告，确定向所述终端发送切换命令；
    在源基站传输完成所述目标PDU set所属的全部PDU，包括：
    在向所述终端发送切换命令之前，向所述终端发送所述目标PDU set所属的全部PDU。
  26. 根据权利要求23-24任一项所述的目标通信设备，其特征在于，所述目标PDU set为上行数据，所述目标通信设备为终端；
    所述确定终端处于小区变更，包括：
    接收所述源基站发送的切换命令；
    基于所述切换命令，确定从源基站断开，接入目标基站，所述目标基站为所述终端完成切换之后接入的基站；
    在源基站传输完成所述目标PDU set所属的全部PDU，包括：
    在从所述源基站断开之前，向所述源基站发送所述目标PDU set所属的全部PDU。
  27. 根据权利要求26所述的目标通信设备，其特征在于，所述目标PDU set所属的全部PDU中的最后一个上行传输的PDU中包括终止标志，所述终止标志用于表征所述PDU为所述目标PDU set所属的全部PDU中的最后一个PDU。
  28. 根据权利要求23所述的目标通信设备，其特征在于，所述目标PDU set的传输处理方式，包括：
    在目标基站传输完成所述目标PDU set所属的全部PDU。
  29. 根据权利要求23-28任一项所述的目标通信设备，其特征在于，所述目标PDU set为下行数据，所述目标通信设备为源基站；
    所述确定终端处于小区变更，包括：
    基于终端测量报告，确定向所述终端发送切换命令；
    在目标基站传输完成所述目标PDU set所属的全部PDU，包括：
    在所述确定向所述终端发送切换命令的情况下，向所述
    目标基站发送所述目标PDU set所属的全部PDU。
  30. 根据权利要求23-28任一项所述的目标通信设备，其特征在于，所述目标PDU set为下行数据，所述目标通信设备为目标基站；
    所述确定终端处于小区变更，包括：
    接收源基站发送的切换请求；
    向所述源基站发送切换请求确认信息，所述切换请求确认信息用于触发所述源基站向所述终端发送切换命令；
    在目标基站传输完成所述目标PDU set所属的全部PDU，包括：
    接收所述源基站发送的所述目标PDU set所属的全部PDU；
    在所述终端完成切换之后，向所述终端发送所述目标PDU set所属的全部PDU。
  31. 根据权利要求23-28任一项所述的目标通信设备，其特征在于，所述目标PDU set为上行数据，所述目标通信设备为终端；
    所述确定终端处于小区变更，包括：
    接收源基站发送的切换命令；
    基于所述切换命令，确定从所述源基站断开，接入目标基站；
    在目标基站传输完成所述目标PDU set所属的全部PDU，包括：
    在所述终端完成切换，接入所述目标基站之后，向所述目标基站发送所述目标PDU set所属的全部PDU。
  32. 根据权利要求23所述的目标通信设备，其特征在于，所述目标PDU set的传输处理方式，包括：
    在目标基站传输第一数据包；所述第一数据包包括所述目标PDU set中未向通信对端发送的PDU和/或未成功发送给通信对端的PDU。
  33. 根据权利要求23-32任一项所述的目标通信设备，其特征在于，所述目标PDU set为下行数据，所述目标通信设备为源基站；
    所述确定终端处于小区变更，包括：
    在所述源基站向终端发送条件切换配置之后，接收目标基站发送的切换成功消息；
    在目标基站传输第一数据包，包括：
    在所述源基站接收到所述切换成功消息之后，向所述目标基站发送所述第一数据包。
  34. 根据权利要求23-32任一项所述的目标通信设备，其特征在于，所述目标PDU set为下行数据，所述目标通信设备为目标基站；
    所述确定终端处于小区变更，包括：
    在所述终端完成切换，接入所述目标基站之后，向源基站发送切换成功消息；
    在目标基站传输第一数据包，包括：
    接收所述源基站发送的所述第一数据包；
    向所述终端发送所述第一数据包。
  35. 根据权利要求23-32任一项所述的目标通信设备，其特征在于，所述目标PDU set为下行数据，所述目标通信设备为源基站；
    所述确定终端处于小区变更，包括：
    基于终端测量报告，确定向终端发送切换命令；
    在目标基站传输第一数据包，包括：
    在确定向所述终端发送所述切换命令的情况下，向所述目标基站发送所述第一数据包。
  36. 根据权利要求23-32任一项所述的目标通信设备，其特征在于，所述目标PDU set为下行数据，所述目标通信设备为目标基站；
    所述确定终端处于小区变更，包括：
    接收源基站发送的切换请求；
    向所述源基站发送切换请求确认信息，所述切换请求确认信息用于触发所述源基站向所述终端发送切换命令；
    在目标基站传输第一数据包，包括：
    接收所述源基站发送的所述第一数据包；
    在所述终端完成切换之后，向所述终端发送所述第一数据包。
  37. 根据权利要求23-32任一项所述的目标通信设备，其特征在于，所述目标PDU set为上行数据，所述目标通信设备为终端；
    所述确定终端处于小区变更，包括：
    接收源基站发送的切换命令；
    基于所述切换命令，确定从所述源基站断开，接入所述目标基站；
    在目标基站传输第一数据包，包括：
    在所述终端完成切换，接入所述目标基站之后，向所述目标基站发送所述第一数据包。
  38. 根据权利要求23-32任一项所述的目标通信设备，其特征在于，所述目标PDU set为上行数据，所述目标通信设备为终端；
    所述确定终端处于小区变更，包括：
    基于目标小区配置和切换条件，确定终端处于条件切换的场景，在满足所述切换条件的情况下接入所述目标基站；
    在目标基站传输第一数据包，包括：
    在所述终端完成切换，接入所述目标基站之后，向所述目标基站发送所述第一数据包。
  39. 根据权利要求23所述的目标通信设备，其特征在于，所述目标PDU set的传输处理方式，包括：
    丢弃第二数据包；
    所述第二数据包为所述目标PDU set中未向通信对端发送的PDU和/或未成功发送给通信对端的PDU。
  40. 根据权利要求23-39任一项所述的目标通信设备，其特征在于，所述目标PDU set为下行数据，所述目标通信设备为源基站；
    所述确定终端处于小区变更，包括：
    在所述源基站向所述终端发送条件切换配置之后，接收目标基站发送的切换成功消息；
    丢弃第二数据包，包括：
    在所述源基站接收到所述切换成功消息之后，丢弃所述第二数据包。
  41. 根据权利要求23-39任一项所述的目标通信设备，其特征在于，所述目标PDU set为下行数据，所述目标通信设备为源基站；
    所述确定终端处于小区变更，包括：
    基于终端测量报告，确定向终端发送切换命令；
    丢弃第二数据包，包括：
    在确定向所述终端发送所述切换命令的情况下，丢弃第二数据包。
  42. 根据权利要求23-39任一项所述的目标通信设备，其特征在于，所述目标PDU set为上行数据，所述目标通信设备为终端；
    所述确定终端处于小区变更，包括：
    接收源基站发送的切换命令；
    基于所述切换命令，确定从所述源基站断开，接入目标基站；
    丢弃第二数据包，包括：
    在接收到所述切换命令之后，丢弃所述第二数据包。
  43. 根据权利要求23-39任一项所述的目标通信设备，其特征在于，所述目标PDU set为上行数据，所述目标通信设备为终端；
    所述确定终端处于小区变更，包括：
    基于目标小区配置和切换条件，确定终端处于条件切换的场景，在满足所述切换条件的情况下接入目标基站；
    丢弃第二数据包，包括：
    在确定满足所述切换条件之后，丢弃所述第二数据包。
  44. 根据权利要求23-43任一项所述的目标通信设备，其特征在于，所述目标PDU set为上行数据，所述目标通信设备为源基站或目标基站；
    所述操作还包括：
    向所述终端发送所述目标PDU set的标识，所述标识用于指示使用所述传输处理方式的所述目标PDU set。
  45. 一种数据传输装置，其特征在于，包括：
    第一确定模块，用于在确定终端处于小区变更的情况下，确定存在未完全传输成功的目标PDU set；所述未完全传输成功的目标PDU set所属的全部或部分PDU没有被发送或者没有被成功发送；
    第二确定模块，用于确定所述目标PDU set的传输处理方式。
  46. 根据权利要求45所述的数据传输装置，其特征在于，所述目标PDU set的传输处理方式具体包括：
    在源基站传输完成所述目标PDU set所属的全部PDU；所述源基站为所述终端切换之前接入的基站。
  47. 根据权利要求45-46任一项所述的数据传输装置，其特征在于，所述目标PDU set为下行数据，所述目标通信设备为源基站；
    所述第一确定模块还用于：
    基于终端测量报告，确定向所述终端发送切换命令；
    所述目标PDU set的传输处理方式具体包括：
    在向所述终端发送切换命令之前，向所述终端发送所述目标PDU set所属的全部PDU。
  48. 根据权利要求45-46任一项所述的数据传输装置，其特征在于，所述目标PDU set为上行数据，所述目标通信设备为终端；
    所述第一确定模块还包括：
    第一接收单元，用于接收所述源基站发送的切换命令；
    第一确定单元，用于基于所述切换命令，确定从所述源基站断开，接入目标基站，所述目标基站为所述终端完成切换之后接入的基站；
    所述目标PDU set的传输处理方式具体包括：
    在从源基站断开之前，向所述源基站发送所述目标PDU set所属的全部PDU。
  49. 根据权利要求48所述的数据传输装置，其特征在于，所述目标PDU set所属的全部PDU中的最后一个上行传输的PDU中包括终止标志，所述终止标志用于表征所述PDU为所述目标PDU set所属的全部PDU中的最后一个PDU。
  50. 根据权利要求45所述的数据传输装置，其特征在于，所述目标PDU set的传输处理方式具体包括：
    在目标基站传输完成所述目标PDU set所属的全部PDU。
  51. 根据权利要求45-50任一项所述的数据传输装置，其特征在于，所述目标PDU set为下行数据，所述目标通信设备为源基站；
    所述第一确定模块还用于：
    基于终端测量报告，确定向所述终端发送切换命令；
    所述目标PDU set的传输处理方式具体包括：
    在所述确定向所述终端发送切换命令的情况下，向所述目标基站发送所述目标PDU set所属的全部PDU。
  52. 根据权利要求45-50任一项所述的数据传输装置，其特征在于，所述目标PDU set为下行数据，所述目标通信设备为目标基站；
    所述第一确定模块还包括：
    第二接收单元，用于接收源基站发送的切换请求；
    第一发送单元，用于向所述源基站发送切换请求确认信息，所述切换请求确认信息用于触发所述源基站向所述终端发送切换命令；
    所述目标PDU set的传输处理方式具体包括：
    接收所述源基站发送的所述目标PDU set所属的全部PDU；
    在所述终端完成切换之后，向所述终端发送所述目标PDU set所属的全部PDU。
  53. 根据权利要求45-50任一项所述的数据传输装置，其特征在于，所述目标PDU set为上行数据，所述目标通信设备为终端；
    所述第一确定模块还包括：
    第三接收单元，用于接收源基站发送的切换命令；
    第二确定单元，用于基于所述切换命令，确定从所述源基站断开，接入目标基站；
    所述目标PDU set的传输处理方式具体包括：
    在所述终端完成切换，接入所述目标基站之后，向所述目标基站发送所述目标PDU set所属的全部PDU。
  54. 根据权利要求45所述的数据传输装置，其特征在于，所述目标PDU set的传输处理方式具体包括：
    在目标基站传输第一数据包；所述第一数据包包括所述目标PDU set中未向通信对端发送的PDU和/或未成功发送给通信对端的PDU。
  55. 根据权利要求45-54任一项所述的数据传输装置，其特征在于，所述目标PDU set为下行数据，所述目标通信设备为源基站；
    所述第一确定模块还包括：
    第四接收单元，用于在所述源基站向终端发送条件切换配置之后，接收目标基站发送的切换成功消息；
    所述目标PDU set的传输处理方式具体包括：
    在所述源基站接收到所述切换成功消息之后，向所述目标基站发送所述 第一数据包。
  56. 根据权利要求45-54任一项所述的数据传输装置，其特征在于，所述目标PDU set为下行数据，所述目标通信设备为目标基站；
    所述第一确定模块还包括：
    第二发送单元，用于在所述终端完成切换，接入所述目标基站之后，向源基站发送切换成功消息；
    所述目标PDU set的传输处理方式具体包括：
    接收所述源基站发送的所述第一数据包；
    向所述终端发送所述第一数据包。
  57. 根据权利要求45-54任一项所述的数据传输装置，其特征在于，所述目标PDU set为下行数据，所述目标通信设备为源基站；
    所述第一确定模块还用于：
    基于终端测量报告，确定向终端发送切换命令；
    所述目标PDU set的传输处理方式具体包括：
    在确定向所述终端发送所述切换命令的情况下，向所述目标基站发送所述第一数据包。
  58. 根据权利要求45-54任一项所述的数据传输装置，其特征在于，所述目标PDU set为下行数据，所述目标通信设备为目标基站；
    所述第一确定模块还包括：
    第五接收单元，用于接收源基站发送的切换请求；
    第三发送单元，用于向所述源基站发送切换请求确认信息，所述切换请求确认信息用于触发所述源基站向所述终端发送切换命令；
    所述目标PDU set的传输处理方式具体包括：
    接收所述源基站发送的所述第一数据包；
    在所述终端完成切换之后，向所述终端发送所述第一数据包。
  59. 根据权利要求45-54任一项所述的数据传输装置，其特征在于，所述目标PDU set为上行数据，所述目标通信设备为终端；
    所述第一确定模块还包括：
    第六接收单元，用于接收源基站发送的切换命令；
    第三确定单元，用于基于所述切换命令，确定从所述源基站断开，接入所述目标基站；
    所述目标PDU set的传输处理方式具体包括：
    在所述终端完成切换，接入所述目标基站之后，向所述目标基站发送所述第一数据包。
  60. 根据权利要求45-54任一项所述的数据传输装置，其特征在于，所述目标PDU set为上行数据，所述目标通信设备为终端；
    所述第一确定模块还用于：
    基于目标小区配置和切换条件，确定终端处于条件切换的场景，在满足所述切换条件的情况下接入所述目标基站；
    所述目标PDU set的传输处理方式具体包括：
    在所述终端完成切换，接入所述目标基站之后，向所述目标基站发送所述第一数据包。
  61. 根据权利要求45所述的数据传输装置，其特征在于，所述目标PDU set的传输处理方式具体包括：
    丢弃第二数据包；
    所述第二数据包为所述目标PDU set中未向通信对端发送的PDU和/或未成功发送给通信对端的PDU。
  62. 根据权利要求45-61任一项所述的数据传输装置，其特征在于，所述目标PDU set为下行数据，所述目标通信设备为源基站；
    所述第一确定模块还包括：
    第七接收单元，用于在所述源基站向所述终端发送条件切换配置之后，接收目标基站发送的切换成功消息；
    所述目标PDU set的传输处理方式具体包括：
    在所述源基站接收到所述切换成功消息之后，丢弃所述第二数据包。
  63. 根据权利要求45-61任一项所述的数据传输装置，其特征在于，所述目标PDU set为下行数据，所述目标通信设备为源基站；
    所述第一确定模块还用于：
    基于终端测量报告，确定向终端发送切换命令；
    所述目标PDU set的传输处理方式具体包括：
    在确定向所述终端发送所述切换命令的情况下，丢弃第二数据包。
  64. 根据权利要求45-61任一项所述的数据传输装置，其特征在于，所述目标PDU set为上行数据，所述目标通信设备为终端；
    所述第一确定模块还包括：
    第八接收单元，用于接收源基站发送的切换命令；
    第四确定单元，用于基于所述切换命令，确定从所述源基站断开，接入目标基站；
    所述目标PDU set的传输处理方式具体包括：
    在接收到所述切换命令之后，丢弃所述第二数据包。
  65. 根据权利要求45-61任一项所述的数据传输装置，其特征在于，所述目标PDU set为上行数据，所述目标通信设备为终端；
    所述第一确定模块还用于：
    基于目标小区配置和切换条件，确定终端处于条件切换的场景，在满足所述切换条件的情况下接入目标基站；
    所述目标PDU set的传输处理方式具体包括：
    在确定满足所述切换条件之后，丢弃所述第二数据包。
  66. 根据权利要求45-65任一项所述的数据传输装置，其特征在于，所述目标PDU set为上行数据，所述目标通信设备为源基站或目标基站；
    所述装置还包括：
    发送模块，用于向所述终端发送所述目标PDU set的标识，所述标识用于指示使用所述传输处理方式的所述目标PDU set。
  67. 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22任一项所述的方法。
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