WO2022083732A1 - 数据传输方法、装置及设备 - Google Patents

数据传输方法、装置及设备 Download PDF

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Publication number
WO2022083732A1
WO2022083732A1 PCT/CN2021/125671 CN2021125671W WO2022083732A1 WO 2022083732 A1 WO2022083732 A1 WO 2022083732A1 CN 2021125671 W CN2021125671 W CN 2021125671W WO 2022083732 A1 WO2022083732 A1 WO 2022083732A1
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Prior art keywords
network device
identifier
data packet
progress information
data
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PCT/CN2021/125671
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English (en)
French (fr)
Inventor
韩立锋
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展讯通信（上海）有限公司
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Priority claimed from CN202011139780.XA external-priority patent/CN114390609B/zh
Application filed by 展讯通信（上海）有限公司 filed Critical 展讯通信（上海）有限公司
Priority to EP21882144.5A priority Critical patent/EP4236455A4/en
Priority to US18/033,520 priority patent/US20230413123A1/en
Publication of WO2022083732A1 publication Critical patent/WO2022083732A1/zh

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    • 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
    • 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
    • H04W36/0007—Control or signalling for completing the hand-off for multicast or broadcast services, e.g. MBMS
    • 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
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1635—Cumulative acknowledgement, i.e. the acknowledgement message applying to all previous messages
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1887—Scheduling and prioritising arrangements
    • 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
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0058—Transmission of hand-off measurement information, e.g. 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
    • H04W36/14—Reselecting a network or an air interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link
    • H04L2001/0093—Point-to-multipoint

Definitions

  • the present invention relates to the field of communication technologies, and in particular, to a data transmission method, apparatus and device.
  • a network device can provide a multicast broadcast service (MBS) to a terminal device.
  • MBS multicast broadcast service
  • the MBS service means that the network device can multicast or broadcast data to the terminal device.
  • the terminal device can switch from a cell served by one network device to a cell served by another network device.
  • the terminal device first disconnects the network connection from the source network device, and then establishes a network connection with the target network device.
  • downlink data packets may be lost, resulting in poor reliability of network switching.
  • Embodiments of the present application provide a data transmission method, apparatus, and device, which improve the reliability of network switching.
  • an embodiment of the present application provides a data transmission method, including:
  • the first network device acquires at least one first data packet of the first service, and the at least one first data packet is determined according to the progress information of the first service sent by the first network device and the second network device,
  • the first network device is a network device accessed by the terminal device before network switching
  • the second network device is a network device accessed by the terminal device after network switching;
  • the first network device sends the at least one first data packet to the second network device, where the at least one data packet is a data packet to be sent by the second network device to the terminal device.
  • the at least one first data packet includes:
  • the first network device Before the first network device sends the handover request message to the second network device, the first network device has not successfully sent the data packet and the second network device has successfully sent the data packet.
  • the first network device acquires at least one first data packet, including:
  • the first network device determines whether to perform data reverse transmission according to the first progress information and the second progress information
  • the first network device determines to perform data reverse transmission
  • the first network device acquires the at least one piece of first data according to the first progress information and the second progress information according to the first network device Bag.
  • the transmission mode of the first network device is radio link control RLC confirmation mode AM
  • the transmission mode of the second network device is RLC AM
  • the first progress information includes at least one of the following: a first identifier or a sending status of a data packet that has been sent by the first network device, and the first identifier is a continuous data packet that has been successfully sent by the first network device
  • the maximum identifier of , and the sending status is either successful sending or failed sending;
  • the second progress information includes: a second identifier, where the second identifier is the largest identifier of the consecutive data packets that have been successfully sent by the second network device.
  • the first network device determines whether to perform data reverse transmission according to the first progress information and the second progress information, including:
  • the first network device determines whether the second identifier is greater than the first identifier
  • the first network device determines to perform data reverse transmission:
  • the first network device determines not to perform data reverse transmission.
  • the at least one first data packet includes:
  • the transmission mode of the first network device is RLC unacknowledged mode UM
  • the transmission mode of the second network device is RLC UM
  • the first progress information includes: a third identifier, where the third identifier is the largest identifier of the data packet sent by the first network device;
  • the second progress information includes: a fourth identifier, where the fourth identifier is the largest identifier of the data packet that has been sent by the second network device, or the fourth identifier is in the sending buffer of the second network device.
  • the minimum identifier of the packet is the fourth identifier, where the fourth identifier is the largest identifier of the data packet that has been sent by the second network device, or the fourth identifier is in the sending buffer of the second network device. The minimum identifier of the packet.
  • the first network device determines whether to perform data reverse transmission according to the first progress information and the second progress information, including:
  • the first network device determines whether the fourth identifier is greater than the third identifier
  • the first network device determines to perform data reverse transmission:
  • the first network device determines not to perform data reverse transmission.
  • the at least one first data packet includes:
  • Identify the data packets within a second identification range where the second identification range is: a range larger than the third identification and smaller than the fourth identification.
  • the transmission mode of the first network device is RLC UM
  • the transmission mode of the second network device is RLC AM
  • the first progress information includes: a third identifier, where the third identifier is the largest identifier of the data packet sent by the first network device;
  • the second progress information includes: a second identifier, where the second identifier is the largest identifier of the consecutive data packets that have been successfully sent by the second network device.
  • the first network device determines whether to perform data reverse transmission according to the first progress information and the second progress information, including:
  • the first network device determines whether the second identifier is greater than the third identifier
  • the first network device determines to perform data reverse transmission:
  • the first network device determines not to perform data reverse transmission.
  • the at least one first data packet includes:
  • Identify data packets within a third identification range where the third identification range is: a range greater than the third identification and less than or equal to the second identification.
  • the transmission mode of the first network device is RLC AM
  • the transmission mode of the second network device is RLC UM
  • the first progress information includes at least one of the following: a first identifier or a sending status of a data packet that has been sent by the first network device, and the first identifier is a continuous data packet that has been successfully sent by the first network device
  • the maximum identifier of , and the sending status is either successful sending or failed sending;
  • the second progress information includes: a fourth identifier, where the fourth identifier is the largest identifier of the data packet that has been sent by the second network device, or the fourth identifier is in the sending buffer of the second network device.
  • the minimum identifier of the packet is the fourth identifier, where the fourth identifier is the largest identifier of the data packet that has been sent by the second network device, or the fourth identifier is in the sending buffer of the second network device. The minimum identifier of the packet.
  • the first network device determines whether to perform data reverse transmission according to the first progress information and the second progress information, including:
  • the first network device determines whether the fourth identifier is greater than the first identifier
  • the first network device determines to perform data reverse transmission:
  • the first network device determines not to perform data reverse transmission.
  • the at least one first data packet includes:
  • the first network device acquires at least one first data packet, including:
  • the first network device acquires the at least one first data packet according to the identifier of the at least one first data packet.
  • an embodiment of the present application provides a data transmission method, including:
  • the second network device receives at least one first data packet sent by the first network device, where the at least one first data packet is determined according to the progress information of the first service sent by the first network device and the second network device,
  • the first network device is a network device accessed by the terminal device before network switching
  • the second network device is a network device accessed by the terminal device after network switching;
  • the second network device sends the at least one first data packet to the terminal device.
  • the first data packet includes:
  • the first network device Before the first network device sends the handover request message to the second network device, the first network device has not successfully sent the data packet and the second network device has successfully sent the data packet.
  • the method before the second network device receives at least one first data packet sent by the first network device, the method further includes:
  • the second network device determines to perform data reverse transmission according to the first progress information and the second progress information.
  • the transmission mode of the first network device is radio link control RLC confirmation mode AM
  • the transmission mode of the second network device is RLC AM
  • the first progress information includes at least one of the following: a first identifier or a sending status of a data packet that has been sent by the first network device, and the first identifier is a continuous data packet that has been successfully sent by the first network device
  • the maximum identifier of , and the sending status is either successful sending or failed sending;
  • the second progress information includes: a second identifier, where the second identifier is the largest identifier of the consecutive data packets that have been successfully sent by the second network device.
  • the second network device determines to perform data reverse transmission according to the first progress information and the second progress information, including:
  • the second network device determines whether the second identifier is greater than the first identifier
  • the second network device determines to perform data reverse transmission.
  • the at least one first data packet includes:
  • the transmission mode of the first network device is RLC unacknowledged mode UM
  • the transmission mode of the second network device is RLC UM
  • the first progress information includes: a third identifier, where the third identifier is the largest identifier of the data packet sent by the first network device;
  • the second progress information includes: a fourth identifier, where the fourth identifier is the largest identifier of the data packet that has been sent by the second network device, or the fourth identifier is in the sending buffer of the second network device.
  • the minimum identifier of the packet is the fourth identifier, where the fourth identifier is the largest identifier of the data packet that has been sent by the second network device, or the fourth identifier is in the sending buffer of the second network device. The minimum identifier of the packet.
  • the second network device determines to perform data reverse transmission according to the first progress information and the second progress information, including:
  • the second network device determines whether the fourth identifier is greater than the third identifier
  • the second network device determines to perform data reverse transmission.
  • the at least one first data packet includes:
  • Identify the data packets within a second identification range where the second identification range is: a range larger than the third identification and smaller than the fourth identification.
  • the transmission mode of the first network device is RLC UM
  • the transmission mode of the second network device is RLC AM
  • the first progress information includes: a third identifier, where the third identifier is the largest identifier of the data packet sent by the first network device;
  • the second progress information includes: a second identifier, where the second identifier is the largest identifier of the consecutive data packets that have been successfully sent by the second network device.
  • the second network device determines to perform data reverse transmission according to the first progress information and the second progress information, including:
  • the second network device determines whether the second identifier is greater than the third identifier
  • the second network device determines to perform data reverse transmission.
  • the at least one first data packet includes:
  • Identify data packets within a third identification range where the third identification range is: a range greater than the third identification and less than or equal to the second identification.
  • the transmission mode of the first network device is RLC AM
  • the transmission mode of the second network device is RLC UM
  • the first progress information includes at least one of the following: a first identifier or a sending status of a data packet that has been sent by the first network device, and the first identifier is a continuous data packet that has been successfully sent by the first network device
  • the maximum identifier of , and the sending status is either successful sending or failed sending;
  • the second progress information includes: a fourth identifier, where the fourth identifier is the largest identifier of the data packet that has been sent by the second network device, or the fourth identifier is in the sending buffer of the second network device.
  • the minimum identifier of the packet is the fourth identifier, where the fourth identifier is the largest identifier of the data packet that has been sent by the second network device, or the fourth identifier is in the sending buffer of the second network device. The minimum identifier of the packet.
  • the second network device determines to perform data reverse transmission according to the first progress information and the second progress information, including:
  • the second network device determines whether the fourth identifier is greater than the first identifier
  • the second network device determines to perform data reverse transmission.
  • the at least one first data packet includes:
  • the second network device is a radio bearer MRB in a multicast broadcast manner; the second network device sends the at least one first data packet to the terminal device, including:
  • the second network device sends the at least one first data packet to the terminal device through a unicast radio bearer DRB corresponding to the MRB; or,
  • the second network device sends the at least one first data packet to the terminal device through the temporary transmission resource of the MRB.
  • an embodiment of the present application provides a data transmission device, comprising: a processing module and a sending module, wherein,
  • the processing module is configured to acquire at least one first data packet of the first service, where the at least one first data packet is determined according to the progress information of the first network device and the second network device sending the first service , the first network device is a network device accessed by the terminal device before network switching, and the second network device is a network device accessed by the terminal device after network switching;
  • the sending module is configured to send the at least one first data packet to the second network device, where the at least one data packet is a data packet to be sent by the second network device to the terminal device.
  • the at least one first data packet includes:
  • the first network device Before the first network device sends the handover request message to the second network device, the first network device has not successfully sent the data packet and the second network device has successfully sent the data packet.
  • the processing module is specifically used for:
  • the first progress information and the second progress information determine whether to perform data reverse transmission
  • the at least one first data packet is acquired according to the first network device according to the first progress information and the second progress information.
  • the transmission mode of the first network device is radio link control RLC confirmation mode AM
  • the transmission mode of the second network device is RLC AM
  • the first progress information includes at least one of the following: a first identifier or a sending status of a data packet that has been sent by the first network device, and the first identifier is a continuous data packet that has been successfully sent by the first network device
  • the maximum identifier of , and the sending status is either successful sending or failed sending;
  • the second progress information includes: a second identifier, where the second identifier is the largest identifier of the consecutive data packets that have been successfully sent by the second network device.
  • the processing module is specifically used for:
  • the at least one first data packet includes:
  • the transmission mode of the first network device is RLC unacknowledged mode UM
  • the transmission mode of the second network device is RLC UM
  • the first progress information includes: a third identifier, where the third identifier is the largest identifier of the data packet sent by the first network device;
  • the second progress information includes: a fourth identifier, where the fourth identifier is the largest identifier of the data packet that has been sent by the second network device, or the fourth identifier is in the sending buffer of the second network device.
  • the minimum identifier of the packet is the fourth identifier, where the fourth identifier is the largest identifier of the data packet that has been sent by the second network device, or the fourth identifier is in the sending buffer of the second network device. The minimum identifier of the packet.
  • the processing module is specifically used for:
  • the at least one first data packet includes:
  • Identify the data packets within a second identification range where the second identification range is: a range larger than the third identification and smaller than the fourth identification.
  • the transmission mode of the first network device is RLC UM
  • the transmission mode of the second network device is RLC AM
  • the first progress information includes: a third identifier, where the third identifier is the largest identifier of the data packet sent by the first network device;
  • the second progress information includes: a second identifier, where the second identifier is the largest identifier of the consecutive data packets that have been successfully sent by the second network device.
  • the processing module is specifically used for:
  • the at least one first data packet includes:
  • Identify data packets within a third identification range where the third identification range is: a range greater than the third identification and less than or equal to the second identification.
  • the transmission mode of the first network device is RLC AM
  • the transmission mode of the second network device is RLC UM
  • the first progress information includes at least one of the following: a first identifier or a sending status of a data packet that has been sent by the first network device, and the first identifier is a continuous data packet that has been successfully sent by the first network device
  • the maximum identifier of , and the sending status is either successful sending or failed sending;
  • the second progress information includes: a fourth identifier, where the fourth identifier is the largest identifier of the data packet that has been sent by the second network device, or the fourth identifier is in the sending buffer of the second network device.
  • the minimum identifier of the packet is the fourth identifier, where the fourth identifier is the largest identifier of the data packet that has been sent by the second network device, or the fourth identifier is in the sending buffer of the second network device. The minimum identifier of the packet.
  • the processing module is specifically used for:
  • the at least one first data packet includes:
  • the apparatus further includes a receiving module, wherein,
  • the receiving module is configured to receive the identifier of the at least one first data packet sent by the second network device;
  • the processing module is specifically configured to acquire the at least one first data packet according to the identifier of the at least one first data packet.
  • an embodiment of the present application provides a data transmission device, including: a receiving module and a sending module, wherein,
  • the receiving module is configured to receive at least one first data packet sent by the first network device, where the at least one first data packet is determined according to the progress information of the first service sent by the first network device and the second network device Obtained, the first network device is a network device accessed by the terminal device before network switching, and the second network device is a network device accessed by the terminal device after network switching;
  • the sending module is configured to send the at least one first data packet to the terminal device.
  • the first data packet includes:
  • the first network device Before the first network device sends the handover request message to the second network device, the first network device has not successfully sent the data packet and the second network device has successfully sent the data packet.
  • the apparatus further includes a processing module, and the processing module is configured to:
  • the receiving module Before the receiving module receives the at least one first data packet sent by the first network device, obtain the first progress information of the first service sent by the first network device, and the first progress information sent by the second network device of the first service. a second progress information of the business;
  • the first progress information and the second progress information it is determined to perform data reverse transmission.
  • the transmission mode of the first network device is radio link control RLC confirmation mode AM
  • the transmission mode of the second network device is RLC AM
  • the first progress information includes at least one of the following: a first identifier or a sending status of a data packet that has been sent by the first network device, and the first identifier is a continuous data packet that has been successfully sent by the first network device
  • the maximum identifier of , and the sending status is either successful sending or failed sending;
  • the second progress information includes: a second identifier, where the second identifier is the largest identifier of the consecutive data packets that have been successfully sent by the second network device.
  • the processing module is used for:
  • the at least one first data packet includes:
  • the transmission mode of the first network device is RLC unacknowledged mode UM
  • the transmission mode of the second network device is RLC UM
  • the first progress information includes: a third identifier, where the third identifier is the largest identifier of the data packet sent by the first network device;
  • the second progress information includes: a fourth identifier, where the fourth identifier is the largest identifier of the data packet that has been sent by the second network device, or the fourth identifier is in the sending buffer of the second network device.
  • the minimum identifier of the packet is the fourth identifier, where the fourth identifier is the largest identifier of the data packet that has been sent by the second network device, or the fourth identifier is in the sending buffer of the second network device. The minimum identifier of the packet.
  • the processing module is specifically used for:
  • the at least one first data packet includes:
  • Identify the data packets within a second identification range where the second identification range is: a range larger than the third identification and smaller than the fourth identification.
  • the transmission mode of the first network device is RLC UM
  • the transmission mode of the second network device is RLC AM
  • the first progress information includes: a third identifier, where the third identifier is the largest identifier of the data packet sent by the first network device;
  • the second progress information includes: a second identifier, where the second identifier is the largest identifier of the consecutive data packets that have been successfully sent by the second network device.
  • the processing module is specifically used for:
  • the at least one first data packet includes:
  • Identify data packets within a third identification range where the third identification range is: a range greater than the third identification and less than or equal to the second identification.
  • the transmission mode of the first network device is RLC AM
  • the transmission mode of the second network device is RLC UM
  • the first progress information includes at least one of the following: a first identifier or a sending status of a data packet that has been sent by the first network device, and the first identifier is a continuous data packet that has been successfully sent by the first network device
  • the maximum identifier of , and the sending status is either successful sending or failed sending;
  • the second progress information includes: a fourth identifier, where the fourth identifier is the largest identifier of the data packet that has been sent by the second network device, or the fourth identifier is in the sending buffer of the second network device.
  • the minimum identifier of the packet is the fourth identifier, where the fourth identifier is the largest identifier of the data packet that has been sent by the second network device, or the fourth identifier is in the sending buffer of the second network device. The minimum identifier of the packet.
  • the processing module is specifically used for:
  • the at least one first data packet includes:
  • the second network device is a radio bearer MRB in a multicast broadcast manner; the sending module is specifically configured to:
  • the at least one first data packet is sent to the terminal device through the temporary transmission resource of the MRB.
  • an embodiment of the present application provides a network device, including: a transceiver, a processor, and a memory;
  • the memory stores computer-executable instructions
  • the processor executes the computer-executable instructions stored in the memory, so that the processor executes the data processing method according to any one of the first aspects.
  • an embodiment of the present application provides a network device, including: a transceiver, a processor, and a memory;
  • the memory stores computer-executable instructions
  • the processor executes the computer-executable instructions stored in the memory, so that the processor executes the data processing method according to any one of the second aspects.
  • an embodiment of the present application provides a computer-readable storage medium, where computer-executable instructions are stored in the computer-readable storage medium, and when the computer-executable instructions are executed by a processor, are used to implement any one of the first aspect The data processing method described in item.
  • embodiments of the present application provide a computer-readable storage medium, where computer-executable instructions are stored in the computer-readable storage medium, and when the computer-executable instructions are executed by a processor, are used to implement any one of the second aspect The data processing method described in item.
  • an embodiment of the present application provides a computer program product, which is characterized by comprising a computer program, which implements the data processing method described in any one of the first aspect when the computer program is executed by a processor.
  • an embodiment of the present application provides a computer program product, which is characterized by comprising a computer program, which implements the data processing method described in any one of the second aspect when the computer program is executed by a processor.
  • the first network device can determine at least one first data packet that may be lost during the network switching process, and the at least one first data packet may be lost during the network switching process.
  • the data packet is determined according to the progress information of sending the first service by the first network device and the second network device, and the first network device sends the at least one first data packet to the second network device, so that the second network device sends the terminal to the terminal.
  • the device sends the at least one first data packet, thereby reducing the loss of data packets, thereby improving the reliability of network switching.
  • 1 is a schematic diagram of a transmission buffer provided by an embodiment of the present application.
  • FIG. 2 is an architectural diagram of a communication system provided by an embodiment of the present application.
  • FIG. 3 is a schematic flowchart of a network switching method provided by an embodiment of the present application.
  • FIG. 4 is a schematic flowchart of a data transmission method provided by an embodiment of the present application.
  • FIG. 5 is a schematic flowchart of another data transmission method provided by an embodiment of the present application.
  • FIG. 6 is a schematic flowchart of another data transmission method provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of data transmission provided by an embodiment of the present application.
  • FIG. 8 is another schematic diagram of data transmission provided by an embodiment of the present application.
  • FIG. 9 is another schematic diagram of data transmission provided by an embodiment of the present application.
  • FIG. 10 is a schematic diagram of still another data transmission provided by an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a data transmission apparatus provided by an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of another data transmission apparatus provided by an embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of still another data transmission apparatus provided by an embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of another data transmission apparatus provided by an embodiment of the present application.
  • FIG. 15 is a schematic structural diagram of a network device according to an embodiment of the present application.
  • Network device It is a device with wireless transceiver function. Including but not limited to: Evolved base station (Evolutional Node B, eNB or eNodeB) in long term evolution (LTE), base station (gNodeB or gNB) or TRP in new radio technology (new radio, NR), and subsequent A base station in an evolved system, an access node, a wireless relay node, a wireless backhaul node, etc. in a wireless fidelity (wireless fidelity, WiFi) system.
  • the base station can be: a macro base station, a micro base station, a pico base station, a small base station, a relay station, or a balloon station, etc. Multiple base stations may support the above-mentioned networks of the same technology, or may support the above-mentioned networks of different technologies.
  • a base station may include one or more co-sited or non-co-sited transmission receiving points (TRPs).
  • TRPs transmission receiving points
  • Terminal equipment It is a device with wireless transceiver function. Terminal equipment can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (such as aircraft, balloons and satellites, etc.).
  • the terminal device can be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (virtual reality, VR) terminal device, an augmented reality (augmented reality, AR) terminal device, industrial control ( Wireless terminals in industrial control, in-vehicle terminal equipment, wireless terminals in self driving, wireless terminal equipment in remote medical, wireless terminal equipment in smart grid, transportation security Wireless terminal equipment in (transportation safety), wireless terminal equipment in smart city, wireless terminal equipment in smart home (smart home), wearable terminal equipment, etc.
  • a virtual reality virtual reality
  • AR augmented reality
  • industrial control Wireless terminals in industrial control, in-vehicle terminal equipment, wireless terminals in self driving, wireless terminal equipment in remote medical, wireless terminal equipment in smart grid, transportation security Wireless terminal equipment in (transportation safety), wireless terminal equipment in smart city, wireless terminal equipment in smart home (smart home), wearable terminal equipment, etc.
  • the terminal equipment involved in the embodiments of this application may also be referred to as terminal, user equipment (UE), access terminal equipment, vehicle-mounted terminal, industrial control terminal, UE unit, UE station, mobile station, mobile station, and remote station , remote terminal equipment, mobile equipment, UE terminal equipment, wireless communication equipment, UE proxy or UE device, etc.
  • Terminal devices can also be stationary or mobile.
  • AK Acknowledged mode: After the terminal device receives the data packet sent by the network device, the terminal device sends a success response (or acknowledgment information) to the network device to indicate that the terminal device has successfully received the data packet. In this mode, the network device can determine which data packets the terminal device has successfully received and which data packets have not been received.
  • Unacknowledged mode After the terminal device receives the data packet sent by the network device, the terminal device does not send a successful response to the network device. In this mode, the network device cannot determine which data packets are received by the terminal device and which data packets are not received.
  • Sending cache After the network device sends a data packet to the terminal device, the network device stores the data packet in the sending cache. If the network device receives a successful response from the terminal device to indicate that the terminal device has successfully received the data packet, the network The device deletes the packet in the transmit buffer.
  • the identification of the data packet refers to the identification that can identify the data packet, which can be the serial number or count value of the data packet of a certain protocol layer, for example, the serial number of the packet data convergence protocol (PDCP) protocol layer. or count value.
  • PDCP packet data convergence protocol
  • the transmission buffer will be described below with reference to FIG. 1 .
  • FIG. 1 is a schematic diagram of a sending buffer provided by an embodiment of the present application.
  • a maximum of 5 data packets can be stored in the sending buffer of the terminal device.
  • data packet 1 data packet 2 and data packet 3 are stored in the transmission buffer of the terminal device.
  • the terminal device deletes the data packet 1 in the sending buffer and stores the data packet in the sending buffer. 4.
  • the sending buffer includes data packet 2, data packet 3 and data packet 4.
  • the terminal device deletes the data packet 3 in the sending buffer.
  • the sending buffer includes the data packet 2 and the data packet 4.
  • N is the maximum number of data packets that can be stored in the sending buffer. For example, if N is 5, the last 5 data packets sent by the network device are stored in the sending buffer.
  • FIG. 2 is an architectural diagram of a communication system provided by an embodiment of the present application. Please refer to FIG. 2 , including a network device 201 , a network device 202 and a terminal device 203 .
  • the cell served by the network device 201 is cell 1
  • the cell served by the network device 202 is cell 2.
  • the network device 201 can be handed over from cell 1 to cell 2 .
  • FIG. 3 is a schematic flowchart of a network switching method provided by an embodiment of the present application. Referring to Figure 3, the method can include:
  • the source network device sends measurement configuration information to the terminal device.
  • the measurement configuration information may include at least one measurement event, where the at least one measurement event refers to an event to be measured by the terminal device.
  • measurement events may include event A3, event A5, and the like.
  • Event A3 means that the signal quality of the neighbor cell is higher than the signal quality of the serving cell by a certain threshold.
  • Event A5 means that the signal quality of the serving cell is less than the threshold 1, and the signal quality of the neighboring cell is greater than the threshold 2.
  • the terminal device sends a measurement report to the source network device.
  • the terminal device may first perform cell measurement to obtain a measurement report, and then send the measurement report to the source network device.
  • the terminal device may periodically send a measurement report to the source network device, or the terminal device may send a measurement report to the source network device when a measurement event is satisfied. For example, assuming that the measurement event includes event A3, when the terminal device measures that the signal quality of the neighboring cell is higher than that of the serving cell by a certain threshold, the terminal device sends a measurement report to the source network device. For example, assuming that the measurement event includes event A5, the terminal device sends a measurement report to the source network device when the terminal device measures that the signal quality of the serving cell is less than threshold 1 and the signal quality of the neighboring cell is greater than threshold 2.
  • the source network device determines to switch the terminal device to the target network device.
  • the source network device may determine to switch the terminal device to the target network device according to the measurement report and radio resource management (radio resource management, RRM).
  • radio resource management radio resource management
  • the source network device sends a handover request message to the target network device.
  • the handover request message is used to request to handover the terminal device to the target network device, and the handover request message may include information such as the context of the terminal device.
  • the target network device sends a handover request confirmation message to the source network device.
  • the handover request confirmation message is used to indicate that the target network device agrees to handover the terminal device to the target network device.
  • the handover request handover message may further include: resource configuration information for the terminal device to perform random access in the target cell served by the target network device.
  • the source network device performs data forwarding (data forwarding) to the target network device.
  • the source network device may determine at least one data packet according to the method shown in the embodiment of the present application, and send the at least one data packet to the target network device.
  • the specific process may refer to the following embodiments, which will not be repeated here.
  • the source network device sends sequence number (sequence number, SN) status (status) information to the target network device.
  • SN status can indicate which packets the source network device has sent to the end device.
  • the source network device sends a radio resource control (Radio Resource Control, RRC) reconfiguration (reconfiguration) message to the terminal device.
  • RRC Radio Resource Control
  • the RRC reconfiguration (RRC reconfiguration) message includes handover command information.
  • the terminal device is disconnected from the source network device and connected to the target network device.
  • the terminal device sends an RRC reconfiguration complete (RRC reconfiguration complete) message to the target network device.
  • RRC reconfiguration complete RRC reconfiguration complete
  • the target network device sends a path switching request message to an access and mobility management function (access and mobility function, AMF) entity.
  • AMF access and mobility management function
  • the AMF entity sends a path switching confirmation message to the target network device.
  • the target network device sends a terminal context release message to the source network device.
  • the source network device releases the terminal device context.
  • a wireless connection is established between the terminal device 203 and the network device 201.
  • the terminal device 203 is disconnected from the network device 201, and A connection is established with the network device 202 .
  • the network device 201 and the network device 202 can simultaneously provide the MBS service, that is, the network device 201 and the network device 202 can simultaneously broadcast or multicast the data packets of a certain service to the terminal devices in their cells, and the network device 201 and the network device 202 send The progress of the data packets may be different.
  • the terminal device may not be able to receive some data packets of the service. For example, when the network device 201 sends the 20th data packet, the network device 202 may have sent the 28th data packet. After the terminal device switches from cell 1 to cell 2, the terminal device may not be able to receive the 21st to 27th data packets. packets, or the end device may not be able to receive more packets. As can be seen from the above, in the process of network handover, downlink data packets may be lost, resulting in poor reliability of network handover.
  • the first network device may determine The data packets that may be lost during the network switching process, and the data packets that may be lost are sent to the second network device (target network device), so that the second network device sends the data packets that may be lost to the terminal device again, thereby reducing the number of data packets. loss, thereby improving the reliability of network switching.
  • FIG. 4 is a schematic flowchart of a data transmission method according to an embodiment of the present application. Referring to Figure 4, the method can include:
  • the first network device acquires at least one first data packet.
  • the first network device is a network device currently accessed by the terminal device
  • the second network device is a network device to which the terminal device is to be switched. That is, the first network device is the network device that the terminal device accesses before network switching, and may also be referred to as the source network device; the second network device is the network device that the terminal device accesses after network switching, and may also be referred to as the target Network equipment.
  • the embodiment shown in FIG. 4 may be executed in the step shown in S306 .
  • At least one first data packet is a data packet in the first service, and both the first network device and the second network device can send the data packet in the first service.
  • the first network device can multicast or broadcast the data packets in the first service to the terminal devices in the cell it serves
  • the second network device can multicast or broadcast the data packets in the first service to the terminal devices in the cell it serves.
  • data packets, the progress of sending the data packets by the first network device and the second network device may be different.
  • At least one data packet is a data packet that may be lost by the terminal device during network switching (switching from the first network device to the second network device), in other words, at least one data packet is lost during the network switching process by the terminal device.
  • the at least one first data packet is determined and obtained according to the progress information of sending the first service by the first network device and the second network device.
  • the transmission modes of the source network device and the target network device may be AM mode or UM mode. When the transmission modes of the source network device and the target network device are different, the process of acquiring at least one first data packet by the first network device is also different. In the following It is described in the embodiment and will not be repeated here.
  • the at least one first data packet includes: before the first network device sends the handover request message to the second network device, the first network device fails to send the data packet and the second network device successfully sends the data packet.
  • the terminal device fails to send a data packet
  • the terminal device cannot successfully receive the data packet from the first network device
  • the second network device has successfully sent the data packet
  • the terminal device switches to the first network device.
  • the second network device no longer sends the data packet, so that the terminal device cannot successfully receive the data packet from the second network device.
  • the terminal device cannot successfully receive the data packet, resulting in the loss of the data packet.
  • the transmission modes (AM or UM) of the source network device and the target network device are different, the content included in at least one first data packet is different, which will be described in the following embodiments, and will not be repeated here.
  • data packets that are not sent successfully include: data packets that have been sent but have not been sent successfully, and/or data packets that have not been sent.
  • the first network device sends at least one first data packet to the second network device.
  • the second network device sends at least one first data packet to the terminal device.
  • the second network device After the terminal device accesses the second network device, the second network device sends at least one first data packet to the terminal device.
  • the second network device can send at least one first data packet to the terminal device in the following two ways:
  • the first implementation method :
  • the target network device is a multicast/broadcast radio bearer (MBS point to multipoint radio bearer, MRB)
  • MRS point to multipoint radio bearer MRB
  • the target network device configures the terminal device with a unicast data radio bearer (DRB) corresponding to MRB. , and send at least one first data packet to the terminal device through the DRB.
  • DRB unicast data radio bearer
  • the target network device may carry the MRB of the target network device (corresponding to the MRB of the source network device) and the configuration information of the DRB in the handover request confirmation message.
  • the target network device may configure a special MRB temporary transmission resource for the terminal device, and send at least one first data packet to the terminal device through the special MRB temporary transmission resource.
  • the target network device may configure additional physical downlink shared channel (physical downlink shared channel, PDSCH) resources, and send at least one first data packet to the terminal device through the PDSCH resources.
  • the target network device may indicate the location of the PDSCH resource in a multicast control channel (multicast control channel, MCCH) channel, so that the terminal receives at least one first data packet at the location of the PDSCH resource.
  • multicast control channel multicast control channel
  • the first network device may determine at least one first data packet that may be lost during the network switching process, and the at least one first data packet is based on the first network Determined by the progress information of the device and the second network device sending the first service, the first network device sends the at least one first data packet to the second network device, so that the second network device sends the at least one first data packet to the terminal device. data packets, thereby reducing the loss of data packets, thereby improving the reliability of network switching.
  • the first network device may determine at least one first data packet according to the progress of sending the first service by the first network device and the second network device, or the second network device may determine at least one first data packet according to the first
  • the progress of sending the first service by the network device and the second network device determines the identifier of at least one first data packet, and sends the identifier of the at least one first data packet to the first network device, so that the first network device can identify the at least one first data packet according to the at least one first data packet.
  • the identification of the data packets determines at least one first data packet.
  • FIG. 5 is a schematic flowchart of another data transmission method provided by an embodiment of the present application. Referring to Figure 5, the method can include:
  • the first network device acquires first progress information of sending the first service by the first network device, and second progress information of sending the first service by the second network device.
  • the first progress information is used to indicate the sending progress of the data packets in the first service by the first network device.
  • the first progress information may indicate which data packets in the first service are successfully sent by the first network device, and may also indicate Which data packets in the first service were not sent successfully.
  • the transmission modes (AM or UM) of the first network device and the second network device are different, the content included in the first progress information is different, which will be described in the following embodiments, and will not be repeated here.
  • the second progress information is used to indicate the sending progress of the data packets in the first service by the second network device.
  • the second progress information may indicate which data packets in the first service are successfully sent by the second network device, and may also indicate Which data packets in the first service were not sent successfully.
  • the transmission modes (AM or UM) of the first network device and the second network device are different, the content included in the second progress information is different, which will be described in the following embodiments, and will not be repeated here.
  • the second network device may carry the second progress information in the handover request confirmation message, so that the first network device obtains the second progress information in the handover request confirmation message.
  • the first network device determines whether to perform data reverse transmission according to the first progress information and the second progress information.
  • the first network device determines, according to the first progress information and the second progress information, whether the progress of the transmission of the first service by the second network device is greater than that of the transmission of the first service by the first network device, and if so, determines to perform data reverse transmission, If not, it is determined not to perform data reverse transmission. or,
  • the first network device can determine, according to the first progress information and the second progress information, whether there will be a loss of data packets after the terminal device is switched from the first network device to the second network device, and if so, determine to perform data reverse transmission. If not, it is determined not to perform data reverse transmission.
  • the first network device determines at least one first data packet according to the first progress information and the second progress information.
  • the transmission modes (AM or UM) of the source network device and the target network device are different, the process of determining at least one first data packet by the first network device according to the first progress information and the second progress information is different, and the at least one first data packet is different.
  • the contents included in the packages are different, which are described in the following embodiments, and will not be repeated here.
  • the first network device sends at least one first data packet to the second network device.
  • the second network device sends at least one first data packet to the terminal device.
  • the first network device does not perform data reverse transmission.
  • the first network device may perform S307 in the embodiment of FIG. 3 .
  • the first network device can determine whether data reverse transmission needs to be performed according to the progress information of the first service sent by the first network device and the second network device.
  • the first network device may determine at least one first data packet that may be lost during the network switching process according to the progress information of the first service sent by the first network device and the second network device, and send at least one first data packet to the second network device
  • the second network device can send at least one first data packet to the terminal device to reduce the loss of data packets during the network switching process, thereby improving the reliability of the network switching.
  • FIG. 6 is a schematic flowchart of still another data transmission method provided by an embodiment of the present application. Referring to Figure 6, the method can include:
  • the second network device acquires first progress information of sending the first service by the first network device, and second progress information of sending the first service by the second network device.
  • the first network device may carry the first progress information in the handover request message, so that the second network device can obtain the first progress information in the handover request message.
  • the second network device determines whether to perform data reverse transmission according to the first progress information and the second progress information.
  • the second network device sends the second progress information to the first network device.
  • the second network device may send a handover request confirmation message to the first network device, where the handover request confirmation message includes the second progress information.
  • the first network device determines at least one first data packet according to the first progress information and the second progress information.
  • the first network device sends at least one first data packet to the second network device.
  • the second network device sends at least one first data packet to the terminal device.
  • the second network device sends indication information to the first network device.
  • the indication information is used to instruct the first network device not to perform data reverse transmission.
  • the second network device may send a handover request confirmation message to the first network device, where the handover request confirmation message includes indication information.
  • the first network device does not perform data reverse transmission.
  • the first network device may perform S307 in the embodiment of FIG. 3 .
  • the second network device may determine whether data reverse transmission needs to be performed according to the progress information of the first service sent by the first network device and the second network device, and when it is determined that data reverse transmission needs to be performed, The second network device may send progress information of the first service sent by the second network device to the first network device, and the first network device may determine the network switching process according to the progress information of the first service sent by the first network device and the second network device and send at least one first data packet to the second network device, so that after the terminal device switches to the second network device, the second network device can send at least one first data packet to the terminal device. data packets to reduce the loss of data packets in the process of network switching, thereby improving the reliability of network switching.
  • At least one first data packet may also be determined by the second network device.
  • the second network device may send the identifier of at least one first data packet to the first network device, so that the first network device sends at least one identifier of the first data packet to the second network device according to the identifier of the at least one first data packet.
  • One first data packet, the second network device then sends at least one first data packet to the terminal device.
  • the second network device after the second network device determines that at least one first data packet is obtained, if the at least one first data packet is cached in the second network device, the second network device can switch between the terminal device After reaching the second network device, the at least one first data packet is sent to the terminal device.
  • the transmission mode of the first network device and the second network device may be RLC AM or RLC UM.
  • the modes of the first network device and the second network device are different, the first progress information, The second progress information, judging whether to perform data reverse transmission, and at least one first data packet may all be different. Below, they will be described respectively, and may include at least the following four situations:
  • the first case the transmission mode of the first network device is RLC AM, and the transmission mode of the second network device is RLC AM;
  • the first progress information includes at least one of the following: a first identifier or a sending state of a data packet that has been sent by the first network device, the first identifier is the maximum identifier of a continuous data packet that has been successfully sent by the first network device, and the sending state is sending success or failure to send.
  • the data packet that the first network device has successfully sent refers to the data packet that the first network device has received a successful response. That is, after the first network device sends the data packet, if a successful response corresponding to the data packet sent by the terminal device is received, the first network device successfully sends the data packet.
  • the first network device has sent data packet 1, data packet 2, data packet 3, data packet 4 and data packet 5, and the first network device has received data packets corresponding to data packet 1, data packet 2 and data packet 5 If the response is successful, then data packets 3 and 4 are data packets that were not successfully sent.
  • the first progress information may include the identifier of the data packet 2, and the first progress information may also include the sending status of the above five data packets or the sending status of the data packet 3, the data packet 4 and the data packet 5.
  • the second progress information includes: a second identifier, where the second identifier is the largest identifier of the consecutive data packets that have been successfully sent by the second network device.
  • the second network device has sent 13 data packets, and the second network device has not received successful responses corresponding to data packets 11 and 12, and the second network device has received successful responses corresponding to the other 11 data packets, That is, the second network device has successfully sent the consecutive data packets as the data packet 1 - the data packet 10 , and the second identifier is the identifier of the data packet 10 .
  • the first network device or the second network device may determine whether to perform data reverse transmission by: judging whether the second identifier is greater than the first identifier; if so, determine to perform data reverse transmission; if not, determine not to perform data reverse transmission.
  • the at least one first data packet includes: a data packet whose identification is within the first identification range and has not been successfully sent by the first network device, where the first identification range is a range greater than the first identification and less than or equal to the second identification.
  • FIG. 7 is a schematic diagram of data transmission according to an embodiment of the present application.
  • the transmission mode of the first network device is AM
  • the transmission mode of the second network device is AM.
  • the first network device sends (MRB or DRB) data packets of the first service to cell 1 served by the first network device
  • the second network device sends (MRB or DRB) data packets of the second service to cell 2 served by the first network device.
  • the first network device has sent data packets 1 to 5 to the terminal equipment (UE) of cell 1, and the first network device has received the successful responses of data packets 1, 2 and 5, that is, the first A network device has successfully sent data packet 1, data packet 2 and data packet 5, but the first network device has not successfully sent data packet 3 and data packet 4.
  • the second network device has sent data packets 1 to 13 to the terminal equipment (UE) of cell 2, and the first network device has received the successful responses of data packets 1 to 10 and data packet 13, that is, The first network device has successfully sent data packets 1 to 10 and data packets 13, but the first network device has not successfully sent data packets 11 and 12.
  • the first network device determines that the at least one first data packet includes: data packet 3 to data packet 4, and data packet 6 to data packet 10, that is, the identifier of the at least one first data packet includes: 3, 4, 6, 7, 8, 9, 10.
  • the first network device can send data packets 3 to 4, and data packets 6 to 10 to the second network device. After the terminal device switches to the second network device, the second network device sends data packets 3 to the terminal device. to packet 4, and packet 6 to packet 10.
  • the process of switching the terminal device from the first network device to the second network device since the progress of the second network device sending the first service is faster than the progress of the first network device sending the first service, network switching is caused. During the process, some data packets may be lost.
  • the first network device determines at least one first data packet that may be lost, and sends at least one first data packet to the second network device. After the terminal device switches to the second network device, the second network device may send at least one first data packet to the terminal device.
  • a first data packet to reduce the loss of data packets during the network switching process, thereby improving the reliability of the network switching.
  • the second case the transmission mode of the first network device is RLC UM, and the transmission mode of the second network device is RLC UM;
  • the first progress information includes: a third identifier, where the third identifier is the largest identifier of the data packet sent by the first network device.
  • the third identifier is the identifier of data packet 5.
  • the second progress information includes: a fourth identifier, where the fourth identifier is the largest identifier of the data packet sent by the second network device, or the fourth identifier is the smallest identifier of the data packet in the sending buffer of the second network device.
  • the fourth identifier is the identifier of data packet 13 (the second network device has sent the data packets 10 to 13).
  • the largest identifier of the data packet), or the fourth identifier is the identifier of the data packet 10 (the smallest identifier of the data packet in the sending buffer of the second network device).
  • the first network device or the second network device may determine whether to perform data reverse transmission by: judging whether the fourth identifier is greater than the third identifier; if so, determine to perform data reverse transmission; if not, determine not to perform data reverse transmission.
  • the at least one first data packet includes: a data packet with an identification within a second identification range, and the second identification range is a range greater than the third identification and smaller than the fourth identification.
  • FIG. 8 is another schematic diagram of data transmission provided by an embodiment of the present application.
  • the transmission mode of the first network device is UM
  • the transmission mode of the second network device is UM.
  • the first network device sends (MRB or DRB) data packets of the first service to cell 1 served by the first network device
  • the second network device sends (MRB or DRB) data packets of the second service to cell 2 served by the first network device.
  • the first network device has sent data packets 1 to 5 to the terminal equipment (UE) of cell 1 .
  • the second network device has sent the data packets 1 to 13 to the terminal equipment (UE) of the cell 2, and the transmission buffer of the second network device includes the data packets 10 to 13.
  • At least one first data packet includes: data packet 6 to data packet 12 .
  • the first network device may send data packets 6 to 12 to the second network device, and after the terminal device switches to the second network device, the second network device sends data packets 6 to 12 to the terminal device.
  • the process of switching the terminal device from the first network device to the second network device since the progress of the second network device sending the first service is faster than the progress of the first network device sending the first service, network switching is caused. During the process, some data packets may be lost.
  • the first network device determines at least one first data packet that may be lost, and sends at least one first data packet to the second network device. After the terminal device switches to the second network device, the second network device may send at least one first data packet to the terminal device.
  • a first data packet to reduce the loss of data packets during the network switching process, thereby improving the reliability of the network switching.
  • the third case the transmission mode of the first network device is RLC UM, and the transmission mode of the second network device is RLC AM;
  • the first progress information includes: a third identifier, where the third identifier is the largest identifier of the data packet sent by the first network device.
  • the second progress information includes: the second identifier is the maximum identifier of the consecutive data packets that have been successfully sent by the second network device.
  • the first network device or the second network device may determine whether to perform data reverse transmission by: judging whether the second identifier is greater than the third identifier; if so, determine to perform data reverse transmission; if not, determine not to perform data reverse transmission.
  • the at least one first data packet includes: a data packet whose identification is within a third identification range, where the third identification range is a range greater than the third identification and less than or equal to the second identification.
  • FIG. 9 is another schematic diagram of data transmission provided by an embodiment of the present application.
  • the transmission mode of the first network device is UM
  • the transmission mode of the second network device is AM.
  • the first network device sends (MRB or DRB) data packets of the first service to cell 1 served by the first network device
  • the second network device sends (MRB or DRB) data packets of the second service to cell 2 served by the first network device.
  • the first network device has sent data packets 1 to 5 to the terminal equipment (UE) of cell 1 .
  • the second network device has sent data packets 1 to 13 to the terminal equipment (UE) of cell 2, and the first network device has received the successful responses of data packets 1 to 10 and data packet 13, that is, The first network device has successfully sent data packets 1 to 10 and data packets 13, but the first network device has not successfully sent data packets 11 and 12.
  • a network device determines that the at least one first data packet includes: data packets 6 to 10, that is, the identifiers of the at least one first data packet include: 6, 7, 8, 9, and 10.
  • the first network device may send data packets 6 to 10 to the second network device, and after the terminal device switches to the second network device, the second network device sends data packets 6 to 10 to the terminal device.
  • the process of switching the terminal device from the first network device to the second network device since the progress of the second network device sending the first service is faster than the progress of the first network device sending the first service, network switching is caused. During the process, some data packets may be lost.
  • the first network device determines at least one first data packet that may be lost, and sends at least one first data packet to the second network device. After the terminal device switches to the second network device, the second network device may send at least one first data packet to the terminal device.
  • a first data packet to reduce the loss of data packets during the network switching process, thereby improving the reliability of the network switching.
  • the fourth case the transmission mode of the first network device is RLC AM, and the transmission mode of the second network device is RLC UM;
  • the first progress information includes at least one of the following: a first identifier or a sending state of a data packet that has been sent by the first network device, the first identifier is the maximum identifier of a continuous data packet that has been successfully sent by the first network device, and the sending state is sending success or failure to send.
  • the second progress information includes: a fourth identifier, where the fourth identifier is the largest identifier of the data packet sent by the second network device, or the fourth identifier is the smallest identifier of the data packet in the sending buffer of the second network device.
  • the first network device or the second network device can determine whether to perform data reverse transmission by: judging whether the fourth identifier is greater than the first identifier; if so, determine to perform data reverse transmission; if not, determine not to perform data reverse transmission.
  • the at least one first data packet includes: a data packet whose identification is within a fourth identification range and is not successfully sent by the first network device, where the fourth identification range is a range greater than the first identification and smaller than the fourth identification.
  • FIG. 10 is a schematic diagram of still another data transmission provided by an embodiment of the present application.
  • the transmission mode of the first network device is AM
  • the transmission mode of the second network device is UM.
  • the first network device sends (MRB or DRB) data packets of the first service to cell 1 served by the first network device
  • the second network device sends (MRB or DRB) data packets of the second service to cell 2 served by the first network device.
  • the first network device has sent data packets 1 to 5 to the terminal equipment (UE) of cell 1, and the first network device has received the successful responses of data packets 1, 2 and 5, that is, the first A network device has successfully sent data packet 1, data packet 2 and data packet 5, but the first network device has not successfully sent data packet 3 and data packet 4.
  • the second network device has sent the data packets 1 to 13 to the terminal equipment (UE) of the cell 2, and the transmission buffer of the second network device includes the data packets 10 to 13.
  • At least one data packet includes: data packet 3-data packet 4, and data packet 6-data packet 12.
  • the first network device can send data packet 3-data packet 4 and data packet 6-data packet 12 to the second network device. After the terminal device switches to the second network device, the second network device sends the data packet 3 to the terminal device. - Packet 4, and Packet 6 - Packet 12.
  • the process of switching the terminal device from the first network device to the second network device since the progress of the second network device sending the first service is faster than the progress of the first network device sending the first service, network switching is caused. During the process, some data packets may be lost.
  • the first network device determines at least one first data packet that may be lost, and sends at least one first data packet to the second network device. After the terminal device switches to the second network device, the second network device may send at least one first data packet to the terminal device.
  • a first data packet to reduce the loss of data packets during the network switching process, thereby improving the reliability of the network switching.
  • FIG. 11 is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present application.
  • the data processing apparatus 10 may be arranged in the first network device.
  • the data processing apparatus 10 may include: a processing module 11 and a sending module 12, wherein:
  • the processing module 11 is configured to acquire at least one first data packet of the first service, where the at least one first data packet is determined according to the progress information of the first network device and the second network device sending the first service.
  • the first network device is a network device accessed by the terminal device before network switching
  • the second network device is a network device accessed by the terminal device after network switching;
  • the sending module 12 is configured to send the at least one first data packet to the second network device, where the at least one data packet is a data packet to be sent by the second network device to the terminal device.
  • the data processing apparatus provided in the embodiments of the present application can execute the technical solutions shown in the foregoing method embodiments, and the implementation principles and beneficial effects thereof are similar, and details are not repeated here.
  • the at least one first data packet includes:
  • the first network device Before the first network device sends the handover request message to the second network device, the first network device has not successfully sent the data packet and the second network device has successfully sent the data packet.
  • processing module 11 is specifically used for:
  • the first progress information and the second progress information determine whether to perform data reverse transmission
  • the at least one first data packet is acquired according to the first network device according to the first progress information and the second progress information.
  • the transmission mode of the first network device is radio link control RLC confirmation mode AM
  • the transmission mode of the second network device is RLC AM
  • the first progress information includes at least one of the following: a first identifier or a sending state of a data packet that has been sent by the first network device, and the first identifier is a continuous data packet that has been successfully sent by the first network device
  • the maximum identifier of , and the sending status is either successful sending or failed sending;
  • the second progress information includes: a second identifier, where the second identifier is the largest identifier of the consecutive data packets that have been successfully sent by the second network device.
  • processing module 11 is specifically used for:
  • the at least one first data packet includes:
  • the transmission mode of the first network device is RLC unacknowledged mode UM
  • the transmission mode of the second network device is RLC UM
  • the first progress information includes: a third identifier, where the third identifier is the largest identifier of the data packet sent by the first network device;
  • the second progress information includes: a fourth identifier, where the fourth identifier is the largest identifier of the data packet that has been sent by the second network device, or the fourth identifier is in the sending buffer of the second network device.
  • the minimum identifier of the packet is the fourth identifier, where the fourth identifier is the largest identifier of the data packet that has been sent by the second network device, or the fourth identifier is in the sending buffer of the second network device. The minimum identifier of the packet.
  • processing module 11 is specifically used for:
  • the at least one first data packet includes:
  • Identify the data packets within a second identification range where the second identification range is: a range larger than the third identification and smaller than the fourth identification.
  • the transmission mode of the first network device is RLC UM
  • the transmission mode of the second network device is RLC AM
  • the first progress information includes: a third identifier, where the third identifier is the largest identifier of the data packet sent by the first network device;
  • the second progress information includes: a second identifier, where the second identifier is the largest identifier of the consecutive data packets that have been successfully sent by the second network device.
  • processing module 11 is specifically used for:
  • the at least one first data packet includes:
  • Identify data packets within a third identification range where the third identification range is: a range greater than the third identification and less than or equal to the second identification.
  • the transmission mode of the first network device is RLC AM
  • the transmission mode of the second network device is RLC UM
  • the first progress information includes at least one of the following: a first identifier or a sending state of a data packet that has been sent by the first network device, and the first identifier is a continuous data packet that has been successfully sent by the first network device
  • the maximum identifier of , and the sending status is either successful sending or failed sending;
  • the second progress information includes: a fourth identifier, where the fourth identifier is the largest identifier of the data packet that has been sent by the second network device, or the fourth identifier is in the sending buffer of the second network device.
  • the minimum identifier of the packet is the fourth identifier, where the fourth identifier is the largest identifier of the data packet that has been sent by the second network device, or the fourth identifier is in the sending buffer of the second network device. The minimum identifier of the packet.
  • processing module 11 is specifically used for:
  • the at least one first data packet includes:
  • FIG. 12 is a schematic structural diagram of another data transmission apparatus provided by an embodiment of the present application.
  • the data processing apparatus 10 may further include a receiving module 13, wherein:
  • the receiving module 13 is configured to receive the identifier of the at least one first data packet sent by the second network device;
  • the processing module 11 is configured to acquire the at least one first data packet according to the identifier of the at least one first data packet.
  • the data processing apparatus provided in the embodiments of the present application can execute the technical solutions shown in the foregoing method embodiments, and the implementation principles and beneficial effects thereof are similar, and details are not repeated here.
  • FIG. 13 is a schematic structural diagram of still another data transmission apparatus provided by an embodiment of the present application.
  • the data processing apparatus 20 may be arranged in the second network device.
  • the data processing apparatus 20 may include: a receiving module 21 and a sending module 22, wherein,
  • the receiving module 21 is configured to receive at least one first data packet sent by the first network device, where the at least one first data packet is progress information of sending the first service according to the first network device and the second network device It is determined that the first network device is a network device accessed by the terminal device before network switching, and the second network device is a network device accessed by the terminal device after network switching;
  • the sending module 22 is configured to send the at least one first data packet to the terminal device.
  • the data transmission apparatus provided in the embodiments of the present application can implement the technical solutions shown in the foregoing method embodiments, and the implementation principles and beneficial effects thereof are similar, which will not be repeated here.
  • the first data packet includes:
  • the first network device Before the first network device sends the handover request message to the second network device, the first network device has not successfully sent the data packet and the second network device has successfully sent the data packet.
  • FIG. 14 is a schematic structural diagram of still another data transmission apparatus provided by an embodiment of the present application.
  • the data processing apparatus 20 further includes a processing module 23, and the processing module 23 is used for:
  • the receiving module 21 receives at least one first data packet sent by the first network device, obtain first progress information of the first service sent by the first network device, and the second network device sends the first progress information of the first service. Second progress information of the first business;
  • the first progress information and the second progress information it is determined to perform data reverse transmission.
  • the transmission mode of the first network device is RLC confirmation mode AM
  • the transmission mode of the second network device is RLC AM
  • the first progress information includes at least one of the following: a first identifier or a sending state of a data packet that has been sent by the first network device, and the first identifier is a continuous data packet that has been successfully sent by the first network device
  • the maximum identifier of , and the sending status is either successful sending or failed sending;
  • the second progress information includes: a second identifier, where the second identifier is the largest identifier of the consecutive data packets that have been successfully sent by the second network device.
  • the processing module 23 is used for:
  • the at least one first data packet includes:
  • the transmission mode of the first network device is RLC unacknowledged mode UM
  • the transmission mode of the second network device is RLC UM
  • the first progress information includes: a third identifier, where the third identifier is the largest identifier of the data packet sent by the first network device;
  • the second progress information includes: a fourth identifier, where the fourth identifier is the largest identifier of the data packet that has been sent by the second network device, or the fourth identifier is in the sending buffer of the second network device.
  • the minimum identifier of the packet is the fourth identifier, where the fourth identifier is the largest identifier of the data packet that has been sent by the second network device, or the fourth identifier is in the sending buffer of the second network device. The minimum identifier of the packet.
  • processing module 23 is specifically used for:
  • the at least one first data packet includes:
  • Identify the data packets within a second identification range where the second identification range is: a range larger than the third identification and smaller than the fourth identification.
  • the transmission mode of the first network device is RLC UM
  • the transmission mode of the second network device is RLC AM
  • the first progress information includes: a third identifier, where the third identifier is the largest identifier of the data packet sent by the first network device;
  • the second progress information includes: a second identifier, where the second identifier is the largest identifier of the consecutive data packets that have been successfully sent by the second network device.
  • processing module 23 is specifically used for:
  • the at least one first data packet includes:
  • Identify data packets within a third identification range where the third identification range is: a range greater than the third identification and less than or equal to the second identification.
  • the transmission mode of the first network device is RLC AM
  • the transmission mode of the second network device is RLC UM
  • the first progress information includes at least one of the following: a first identifier or a sending status of a data packet that has been sent by the first network device, and the first identifier is a continuous data packet that has been successfully sent by the first network device
  • the maximum identifier of , and the sending status is either successful sending or failed sending;
  • the second progress information includes: a fourth identifier, where the fourth identifier is the largest identifier of the data packet that has been sent by the second network device, or the fourth identifier is in the sending buffer of the second network device.
  • the minimum identifier of the packet is the fourth identifier, where the fourth identifier is the largest identifier of the data packet that has been sent by the second network device, or the fourth identifier is in the sending buffer of the second network device. The minimum identifier of the packet.
  • processing module 23 is specifically used for:
  • the at least one first data packet includes:
  • the second network device is a radio bearer MRB in a multicast broadcast manner; the sending module is specifically configured to:
  • the at least one first data packet is sent to the terminal device through the temporary transmission resource of the MRB.
  • the data transmission apparatus provided in the embodiments of the present application can implement the technical solutions shown in the foregoing method embodiments, and the implementation principles and beneficial effects thereof are similar, which will not be repeated here.
  • FIG. 15 is a schematic structural diagram of a network device according to an embodiment of the present application. Please refer to FIG. 15 .
  • the network device 30 may include: a transceiver 31 , a memory 32 , and a processor 33 .
  • the transceiver 31 may include: a transmitter and/or a receiver.
  • the transmitter may also be referred to as a transmitter, transmitter, transmit port, or transmit interface, or the like, and the receiver may be referred to as a receiver, receiver, receive port, or receive interface, or the like.
  • the transceiver 31 , the memory 32 , and the processor 33 are connected to each other through a bus 34 .
  • memory 32 for storing program instructions
  • the processor 33 is configured to execute the program instructions stored in the memory, so as to make the network device 30 execute any of the data processing methods shown above.
  • the transceiver 31 is used to perform the transceiver function of the network device 30 in the above data processing method.
  • Embodiments of the present application provide a computer-readable storage medium, where computer-executable instructions are stored in the computer-readable storage medium, and when the computer-executable instructions are executed by a processor, are used to implement the above data processing method.
  • Embodiments of the present application may further provide a computer program product, which can be executed by a processor, and when the computer program product is executed, can implement any of the data processing methods performed by the network device shown above.
  • the network device, the computer-readable storage medium, and the computer program product of the embodiments of the present application can execute the above-mentioned data processing method, and the specific implementation process and beneficial effects thereof can be referred to above, which will not be repeated here.
  • the aforementioned program can be stored in a readable memory.
  • the steps including the above method embodiments are executed; and the aforementioned memory (storage medium) includes: read-only memory (English: read-only memory, abbreviation: ROM), RAM, flash memory, hard disk, Solid state drive, magnetic tape (English: magnetic tape), floppy disk (English: floppy disk), optical disc (English: optical disc) and any combination thereof.
  • These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions
  • the apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.
  • the term “comprising” and its variants may mean non-limiting inclusion; the term “or” and its variants may mean “and/or”.
  • the terms “first”, “second” and the like in this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.
  • “plurality” means two or more.
  • “And/or”, which describes the association relationship of the associated objects means that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, A and B exist at the same time, and B exists alone.
  • the character “/" generally indicates that the associated objects are an "or” relationship.

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Abstract

本申请实施例提供一种数据传输方法、装置及设备，该方法包括：第一网络设备获取第一业务的至少一个第一数据包，所述至少一个第一数据包为根据所述第一网络设备和第二网络设备发送所述第一业务的进度信息确定得到的，所述第一网络设备为所述终端设备网络切换前接入的网络设备，所述第二网络设备为所述终端设备网络切换后接入的网络设备；所述第一网络设备向所述第二网络设备发送所述至少一个第一数据包，所述至少一个数据包为所述第二网络设备待向所述终端设备发送的数据包。提高了网络切换的可靠性。

Description

数据传输方法、装置及设备
本申请要求于2020年10月22日提交中国专利局、申请号为202011139780.X、申请名称为“数据传输方法、装置及设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域，尤其涉及一种数据传输方法、装置及设备。
背景技术
网络设备可以向终端设备提供组播广播服务(multicast broadcast service，MBS)，MBS服务是指网络设备可以向终端设备组播或者广播数据。
在实际应用过程中，终端设备可以从一个网络设备服务的小区切换至另一个网络设备服务的小区，在网络切换过程中，终端设备先与源网络设备断开网络连接，再与目标网络设备建立网络连接，在该过程中，可能会出现下行数据包的丢失，导致网络切换的可靠性较差。
发明内容
本申请实施例提供一种数据传输方法、装置及设备，提高了网络切换的可靠性。
第一方面，本申请实施例提供一种数据传输方法，包括：
第一网络设备获取第一业务的至少一个第一数据包，所述至少一个第一数据包为根据所述第一网络设备和第二网络设备发送所述第一业务的进度信息确定得到的，所述第一网络设备为所述终端设备网络切换前接入的网络设备，所述第二网络设备为所述终端设备网络切换后接入的网络设备；
所述第一网络设备向所述第二网络设备发送所述至少一个第一数据包，所述至少一个数据包为所述第二网络设备待向所述终端设备发送的数据包。
在一种可能的实施方式中，所述至少一个第一数据包包括：
在所述第一网络设备向所述第二网络设备发送切换请求消息之前，所述 第一网络设备未成功发送、且所述第二网络设备已成功发送的数据包。
在一种可能的实施方式中，所述第一网络设备获取至少一个第一数据包，包括：
第一网络设备获取所述第一网络设备发送所述第一业务的第一进度信息、以及所述第二网络设备发送所述第一业务的第二进度信息；
所述第一网络设备根据所述第一进度信息和所述第二进度信息，确定是否进行数据反传；
在所述第一网络设备确定进行数据反传时，所述第一网络设备根据所述第一网络设备根据所述第一进度信息和所述第二进度信息，获取所述至少一个第一数据包。
在一种可能的实施方式中，所述第一网络设备的传输模式为无线链路控制RLC确认模式AM，所述第二网络设备的传输模式为RLC AM；
所述第一进度信息包括如下至少一种：第一标识或者所述第一网络设备已发送的数据包的发送状态，所述第一标识为所述第一网络设备已经成功发送的连续数据包的最大标识，所述发送状态为发送成功或者发送失败；
所述第二进度信息包括：第二标识，所述第二标识为所述第二网络设备已经成功发送的连续数据包的最大标识。
在一种可能的实施方式中，所述第一网络设备根据所述第一进度信息和所述第二进度信息，确定是否进行数据反传，包括：
所述第一网络设备判断所述第二标识是否大于所述第一标识；
若是，则所述第一网络设备确定进行数据反传：
若否，则所述第一网络设备确定不进行数据反传。
在一种可能的实施方式中，所述至少一个第一数据包包括：
标识在第一标识范围内且未被所述第一网络设备成功发送的数据包，所述第一标识范围为：大于所述第一标识且小于或等于所述第二标识的范围。
在一种可能的实施方式中，所述第一网络设备的传输模式为RLC非确认模式UM，所述第二网络设备的传输模式为RLC UM；
所述第一进度信息包括：第三标识，所述第三标识为所述第一网络设备已发送的数据包的最大标识；
所述第二进度信息包括：第四标识，所述第四标识为所述第二网络设备已发送的数据包的最大标识，或者所述第四标识为所述第二网络设备的发送 缓存中的数据包的最小标识。
在一种可能的实施方式中，所述第一网络设备根据所述第一进度信息和所述第二进度信息，确定是否进行数据反传，包括：
所述第一网络设备判断所述第四标识是否大于所述第三标识；
若是，则所述第一网络设备确定进行数据反传：
若否，则所述第一网络设备确定不进行数据反传。
在一种可能的实施方式中，所述至少一个第一数据包包括：
标识在第二标识范围内的数据包，所述第二标识范围为：大于所述第三标识且小于所述第四标识的范围。
在一种可能的实施方式中，所述第一网络设备的传输模式为RLC UM，所述第二网络设备的传输模式为RLC AM；
所述第一进度信息包括：第三标识，所述第三标识为所述第一网络设备已发送的数据包的最大标识；
所述第二进度信息包括：第二标识，所述第二标识为所述第二网络设备已经成功发送的连续数据包的最大标识。
在一种可能的实施方式中，所述第一网络设备根据所述第一进度信息和所述第二进度信息，确定是否进行数据反传，包括：
所述第一网络设备判断所述第二标识是否大于第三标识；
若是，则所述第一网络设备确定进行数据反传：
若否，则所述第一网络设备确定不进行数据反传。
在一种可能的实施方式中，所述至少一个第一数据包包括：
标识在第三标识范围内的数据包，所述第三标识范围为：大于所述第三标识且小于或等于所述第二标识的范围。
在一种可能的实施方式中，所述第一网络设备的传输模式为RLC AM，所述第二网络设备的传输模式为RLC UM；
所述第一进度信息包括如下至少一种：第一标识或者所述第一网络设备已发送的数据包的发送状态，所述第一标识为所述第一网络设备已经成功发送的连续数据包的最大标识，所述发送状态为发送成功或者发送失败；
所述第二进度信息包括：第四标识，所述第四标识为所述第二网络设备已发送的数据包的最大标识，或者所述第四标识为所述第二网络设备的发送缓存中的数据包的最小标识。
在一种可能的实施方式中，所述第一网络设备根据所述第一进度信息和所述第二进度信息，确定是否进行数据反传，包括：
所述第一网络设备判断所述第四标识是否大于所述第一标识；
若是，则所述第一网络设备确定进行数据反传：
若否，则所述第一网络设备确定不进行数据反传。
在一种可能的实施方式中，所述至少一个第一数据包包括：
标识在第四标识范围内且未被所述第一网络设备成功发送的数据包，所述第四标识范围为：大于所述第一标识且小于所述第四标识的范围。
在一种可能的实施方式中，所述第一网络设备获取至少一个第一数据包，包括：
所述第一网络设备接收所述第二网络设备发送的所述至少一个第一数据包的标识；
所述第一网络设备根据所述至少一个第一数据包的标识，获取所述至少一个第一数据包。
第二方面，本申请实施例提供一种数据传输方法，包括：
第二网络设备接收第一网络设备发送的至少一个第一数据包，所述至少一个第一数据包为根据所述第一网络设备和第二网络设备发送第一业务的进度信息确定得到的，所述第一网络设备为所述终端设备网络切换前接入的网络设备，所述第二网络设备为所述终端设备网络切换后接入的网络设备；
所述第二网络设备向终端设备发送所述至少一个第一数据包。
在一种可能的实施方式中，所述第一数据包包括：
在所述第一网络设备向所述第二网络设备发送切换请求消息之前，所述第一网络设备未成功发送、且所述第二网络设备已成功发送的数据包。
在一种可能的实施方式中，所述第二网络设备接收第一网络设备发送的至少一个第一数据包之前，还包括：
所述第二网络获取所述第一网络设备发送所述第一业务的第一进度信息、以及所述第二网络设备发送所述第一业务的第二进度信息；
所述第二网络设备根据所述第一进度信息和所述第二进度信息，确定进行数据反传。
在一种可能的实施方式中，
在一种可能的实施方式中，所述第一网络设备的传输模式无线链路控制 RLC确认模式AM，所述第二网络设备的传输模式为RLC AM；
所述第一进度信息包括如下至少一种：第一标识或者所述第一网络设备已发送的数据包的发送状态，所述第一标识为所述第一网络设备已经成功发送的连续数据包的最大标识，所述发送状态为发送成功或者发送失败；
所述第二进度信息包括：第二标识，所述第二标识为所述第二网络设备已经成功发送的连续数据包的最大标识。
在一种可能的实施方式中，所述第二网络设备根据所述第一进度信息和所述第二进度信息，确定进行数据反传，包括：
所述第二网络设备判断所述第二标识是否大于所述第一标识；
若是，则所述第二网络设备确定进行数据反传。
在一种可能的实施方式中，所述至少一个第一数据包包括：
标识在第一标识范围内且未被所述第一网络设备成功发送的数据包，所述第一标识范围为：大于所述第一标识且小于或等于所述第二标识的范围。
在一种可能的实施方式中，所述第一网络设备的传输模式为RLC非确认模式UM，所述第二网络设备的传输模式为RLC UM；
所述第一进度信息包括：第三标识，所述第三标识为所述第一网络设备已发送的数据包的最大标识；
所述第二进度信息包括：第四标识，所述第四标识为所述第二网络设备已发送的数据包的最大标识，或者所述第四标识为所述第二网络设备的发送缓存中的数据包的最小标识。
在一种可能的实施方式中，所述第二网络设备根据所述第一进度信息和所述第二进度信息，确定进行数据反传，包括：
所述第二网络设备判断所述第四标识是否大于所述第三标识；
若是，则所述第二网络设备确定进行数据反传。
在一种可能的实施方式中，所述至少一个第一数据包包括：
标识在第二标识范围内的数据包，所述第二标识范围为：大于所述第三标识且小于所述第四标识的范围。
在一种可能的实施方式中，所述第一网络设备的传输模式为RLC UM，所述第二网络设备的传输模式为RLC AM；
所述第一进度信息包括：第三标识，所述第三标识为所述第一网络设备已发送的数据包的最大标识；
所述第二进度信息包括：第二标识，所述第二标识为所述第二网络设备已经成功发送的连续数据包的最大标识。
在一种可能的实施方式中，所述第二网络设备根据所述第一进度信息和所述第二进度信息，确定进行数据反传，包括：
所述第二网络设备判断所述第二标识是否大于第三标识；
若是，则所述第二网络设备确定进行数据反传。
在一种可能的实施方式中，所述至少一个第一数据包包括：
标识在第三标识范围内的数据包，所述第三标识范围为：大于所述第三标识且小于或等于所述第二标识的范围。
在一种可能的实施方式中，所述第一网络设备的传输模式为RLC AM，所述第二网络设备的传输模式为RLC UM；
所述第一进度信息包括如下至少一种：第一标识或者所述第一网络设备已发送的数据包的发送状态，所述第一标识为所述第一网络设备已经成功发送的连续数据包的最大标识，所述发送状态为发送成功或者发送失败；
所述第二进度信息包括：第四标识，所述第四标识为所述第二网络设备已发送的数据包的最大标识，或者所述第四标识为所述第二网络设备的发送缓存中的数据包的最小标识。
在一种可能的实施方式中，所述第二网络设备根据所述第一进度信息和所述第二进度信息，确定进行数据反传，包括：
所述第二网络设备判断所述第四标识是否大于所述第一标识；
若是，则所述第二网络设备确定进行数据反传。
在一种可能的实施方式中，所述至少一个第一数据包包括：
标识在第四标识范围内且未被所述第一网络设备成功发送的数据包，所述第四标识范围为：大于所述第一标识且小于所述第四标识的范围。
在一种可能的实施方式中，所述第二网络设备为组播广播方式的无线承载MRB；所述第二网络设备向终端设备发送所述至少一个第一数据包，包括：
所述第二网络设备通过所述MRB对应的单播方式的无线承载DRB向所述终端设备发送所述至少一个第一数据包；或者，
所述第二网络设备通过MRB的临时传输资源向所述终端设备发送所述至少一个第一数据包。
第三方面，本申请实施例提供一种数据传输装置，包括：处理模块和发 送模块，其中，
所述处理模块用于，获取第一业务的至少一个第一数据包，所述至少一个第一数据包为根据第一网络设备和第二网络设备发送所述第一业务的进度信息确定得到的，所述第一网络设备为所述终端设备网络切换前接入的网络设备，所述第二网络设备为所述终端设备网络切换后接入的网络设备；
所述发送模块用于，向所述第二网络设备发送所述至少一个第一数据包，所述至少一个数据包为所述第二网络设备待向所述终端设备发送的数据包。
在一种可能的实施方式中，所述至少一个第一数据包包括：
在所述第一网络设备向所述第二网络设备发送切换请求消息之前，所述第一网络设备未成功发送、且所述第二网络设备已成功发送的数据包。
在一种可能的实施方式中，所述处理模块具体用于：
获取所述第一网络设备发送所述第一业务的第一进度信息、以及所述第二网络设备发送所述第一业务的第二进度信息；
根据所述第一进度信息和所述第二进度信息，确定是否进行数据反传；
在确定进行数据反传时，根据所述第一网络设备根据所述第一进度信息和所述第二进度信息，获取所述至少一个第一数据包。
在一种可能的实施方式中，所述第一网络设备的传输模式为无线链路控制RLC确认模式AM，所述第二网络设备的传输模式为RLC AM；
所述第一进度信息包括如下至少一种：第一标识或者所述第一网络设备已发送的数据包的发送状态，所述第一标识为所述第一网络设备已经成功发送的连续数据包的最大标识，所述发送状态为发送成功或者发送失败；
所述第二进度信息包括：第二标识，所述第二标识为所述第二网络设备已经成功发送的连续数据包的最大标识。
在一种可能的实施方式中，所述处理模块具体用于：
判断所述第二标识是否大于所述第一标识；
若是，则确定进行数据反传：
若否，则确定不进行数据反传。
在一种可能的实施方式中，所述至少一个第一数据包包括：
标识在第一标识范围内且未被所述第一网络设备成功发送的数据包，所述第一标识范围为：大于所述第一标识且小于或等于所述第二标识的范围。
在一种可能的实施方式中，所述第一网络设备的传输模式为RLC非确认 模式UM，所述第二网络设备的传输模式为RLC UM；
所述第一进度信息包括：第三标识，所述第三标识为所述第一网络设备已发送的数据包的最大标识；
所述第二进度信息包括：第四标识，所述第四标识为所述第二网络设备已发送的数据包的最大标识，或者所述第四标识为所述第二网络设备的发送缓存中的数据包的最小标识。
在一种可能的实施方式中，所述处理模块具体用于：
判断所述第四标识是否大于所述第三标识；
若是，则确定进行数据反传：
若否，则确定不进行数据反传。
在一种可能的实施方式中，所述至少一个第一数据包包括：
标识在第二标识范围内的数据包，所述第二标识范围为：大于所述第三标识且小于所述第四标识的范围。
在一种可能的实施方式中，所述第一网络设备的传输模式为RLC UM，所述第二网络设备的传输模式为RLC AM；
所述第一进度信息包括：第三标识，所述第三标识为所述第一网络设备已发送的数据包的最大标识；
所述第二进度信息包括：第二标识，所述第二标识为所述第二网络设备已经成功发送的连续数据包的最大标识。
在一种可能的实施方式中，所述处理模块具体用于：
判断所述第二标识是否大于第三标识；
若是，则确定进行数据反传：
若否，则确定不进行数据反传。
在一种可能的实施方式中，所述至少一个第一数据包包括：
标识在第三标识范围内的数据包，所述第三标识范围为：大于所述第三标识且小于或等于所述第二标识的范围。
在一种可能的实施方式中，所述第一网络设备的传输模式为RLC AM，所述第二网络设备的传输模式为RLC UM；
所述第一进度信息包括如下至少一种：第一标识或者所述第一网络设备已发送的数据包的发送状态，所述第一标识为所述第一网络设备已经成功发送的连续数据包的最大标识，所述发送状态为发送成功或者发送失败；
所述第二进度信息包括：第四标识，所述第四标识为所述第二网络设备已发送的数据包的最大标识，或者所述第四标识为所述第二网络设备的发送缓存中的数据包的最小标识。
在一种可能的实施方式中，所述处理模块具体用于：
判断所述第四标识是否大于所述第一标识；
若是，则确定进行数据反传：
若否，则确定不进行数据反传。
在一种可能的实施方式中，所述至少一个第一数据包包括：
标识在第四标识范围内且未被所述第一网络设备成功发送的数据包，所述第四标识范围为：大于所述第一标识且小于所述第四标识的范围。
在一种可能的实施方式中，所述装置还包括接收模块，其中，
所述接收模块用于，接收所述第二网络设备发送的所述至少一个第一数据包的标识；
所述处理模块具体用于，根据所述至少一个第一数据包的标识，获取所述至少一个第一数据包。
第四方面，本申请实施例提供一种数据传输装置，包括：接收模块和发送模块，其中，
所述接收模块用于，接收第一网络设备发送的至少一个第一数据包，所述至少一个第一数据包为根据所述第一网络设备和第二网络设备发送第一业务的进度信息确定得到的，所述第一网络设备为所述终端设备网络切换前接入的网络设备，所述第二网络设备为所述终端设备网络切换后接入的网络设备；
所述发送模块用于，向终端设备发送所述至少一个第一数据包。
在一种可能的实施方式中，所述第一数据包包括：
在所述第一网络设备向所述第二网络设备发送切换请求消息之前，所述第一网络设备未成功发送、且所述第二网络设备已成功发送的数据包。
在一种可能的实施方式中，所述装置还包括处理模块，所述处理模块用于：
在所述接收模块接收第一网络设备发送的至少一个第一数据包之前，获取所述第一网络设备发送所述第一业务的第一进度信息、以及所述第二网络设备发送所述第一业务的第二进度信息；
根据所述第一进度信息和所述第二进度信息，确定进行数据反传。
在一种可能的实施方式中，所述第一网络设备的传输模式无线链路控制RLC确认模式AM，所述第二网络设备的传输模式为RLC AM；
所述第一进度信息包括如下至少一种：第一标识或者所述第一网络设备已发送的数据包的发送状态，所述第一标识为所述第一网络设备已经成功发送的连续数据包的最大标识，所述发送状态为发送成功或者发送失败；
所述第二进度信息包括：第二标识，所述第二标识为所述第二网络设备已经成功发送的连续数据包的最大标识。
在一种可能的实施方式中，所述处理模块用于：
判断所述第二标识是否大于所述第一标识；
若是，则确定进行数据反传。
在一种可能的实施方式中，所述至少一个第一数据包包括：
标识在第一标识范围内且未被所述第一网络设备成功发送的数据包，所述第一标识范围为：大于所述第一标识且小于或等于所述第二标识的范围。
在一种可能的实施方式中，所述第一网络设备的传输模式为RLC非确认模式UM，所述第二网络设备的传输模式为RLC UM；
所述第一进度信息包括：第三标识，所述第三标识为所述第一网络设备已发送的数据包的最大标识；
所述第二进度信息包括：第四标识，所述第四标识为所述第二网络设备已发送的数据包的最大标识，或者所述第四标识为所述第二网络设备的发送缓存中的数据包的最小标识。
在一种可能的实施方式中，所述处理模块具体用于：
判断所述第四标识是否大于所述第三标识；
若是，则确定进行数据反传。
在一种可能的实施方式中，所述至少一个第一数据包包括：
标识在第二标识范围内的数据包，所述第二标识范围为：大于所述第三标识且小于所述第四标识的范围。
在一种可能的实施方式中，所述第一网络设备的传输模式为RLC UM，所述第二网络设备的传输模式为RLC AM；
所述第一进度信息包括：第三标识，所述第三标识为所述第一网络设备已发送的数据包的最大标识；
所述第二进度信息包括：第二标识，所述第二标识为所述第二网络设备已经成功发送的连续数据包的最大标识。
在一种可能的实施方式中，所述处理模块具体用于：
判断所述第二标识是否大于第三标识；
若是，则确定进行数据反传。
在一种可能的实施方式中，所述至少一个第一数据包包括：
标识在第三标识范围内的数据包，所述第三标识范围为：大于所述第三标识且小于或等于所述第二标识的范围。
在一种可能的实施方式中，所述第一网络设备的传输模式为RLC AM，所述第二网络设备的传输模式为RLC UM；
所述第一进度信息包括如下至少一种：第一标识或者所述第一网络设备已发送的数据包的发送状态，所述第一标识为所述第一网络设备已经成功发送的连续数据包的最大标识，所述发送状态为发送成功或者发送失败；
所述第二进度信息包括：第四标识，所述第四标识为所述第二网络设备已发送的数据包的最大标识，或者所述第四标识为所述第二网络设备的发送缓存中的数据包的最小标识。
在一种可能的实施方式中，所述处理模块具体用于：
判断所述第四标识是否大于所述第一标识；
若是，则确定进行数据反传。
在一种可能的实施方式中，所述至少一个第一数据包包括：
标识在第四标识范围内且未被所述第一网络设备成功发送的数据包，所述第四标识范围为：大于所述第一标识且小于所述第四标识的范围。
在一种可能的实施方式中，所述第二网络设备为组播广播方式的无线承载MRB；所述发送模块具体用于：
通过所述MRB对应的单播方式的无线承载DRB向所述终端设备发送所述至少一个第一数据包；或者，
通过MRB的临时传输资源向所述终端设备发送所述至少一个第一数据包。
第五方面，本申请实施例提供一种网络设备，包括：收发器、处理器、存储器；
所述存储器存储计算机执行指令；
所述处理器执行所述存储器存储的计算机执行指令，使得所述处理器执行如第一方面任一项所述的数据处理方法。
第六方面，本申请实施例提供一种网络设备，包括：收发器、处理器、存储器；
所述存储器存储计算机执行指令；
所述处理器执行所述存储器存储的计算机执行指令，使得所述处理器执行如第二方面任一项所述的数据处理方法。
第七方面，本申请实施例提供一种计算机可读存储介质，所述计算机可读存储介质中存储有计算机执行指令，当所述计算机执行指令被处理器执行时用于实现第一方面任一项所述的数据处理方法。
第八方面，本申请实施例提供一种计算机可读存储介质，所述计算机可读存储介质中存储有计算机执行指令，当所述计算机执行指令被处理器执行时用于实现第二方面任一项所述的数据处理方法。
第九方面，本申请实施例提供一种计算机程序产品，其特征在于，包括计算机程序，该计算机程序被处理器执行时实现第一方面任一项所述的数据处理方法。
第十方面，本申请实施例提供一种计算机程序产品，其特征在于，包括计算机程序，该计算机程序被处理器执行时实现第二方面任一项所述的数据处理方法。
本申请实施例提供的数据处理方法、装置及设备，在终端设备进行网络切换的过程中，第一网络设备可以确定在网络切换过程中可能丢失的至少一个第一数据包，该至少一个第一数据包为根据第一网络设备和第二网络设备发送第一业务的进度信息确定得到的，第一网络设备向第二网络设备发送该至少一个第一数据包，以使第二网络设备向终端设备发送该至少一个第一数据包，进而减少数据包的丢失，进而提高网络切换的可靠性。
附图说明
图1为本申请实施例提供的发送缓存的示意图；
图2为本申请实施例提供的一种通信系统的架构图；
图3为本申请实施例提供的网络切换方法的流程示意图；
图4为本申请实施例提供的一种数据传输方法的流程示意图；
图5为本申请实施例提供的另一种数据传输方法的流程示意图；
图6为本申请实施例提供的又一种数据传输方法的流程示意图；
图7为本申请实施例提供的一种数据传输示意图；
图8为本申请实施例提供的另一种数据传输示意图；
图9为本申请实施例提供的又一种数据传输示意图；
图10为本申请实施例提供的再一种数据传输示意图；
图11为本申请实施例提供的一种数据传输装置的结构示意图；
图12为本申请实施例提供的另一种数据传输装置的结构示意图；
图13为本申请实施例提供的再一种数据传输装置的结构示意图；
图14为本申请实施例提供的又一种数据传输装置的结构示意图；
图15为本申请实施例提供的一种网络设备的结构示意图。
具体实施方式
为了便于理解，首先对本申请实施例所涉及的概念进行说明。
网络设备：是一种具有无线收发功能的设备。包括但不限于：长期演进(long term evolution，LTE)中的演进型基站(Evolutional Node B，eNB或eNodeB)，新空口技术(new radio，NR)中的基站(gNodeB或gNB)或TRP，后续演进系统中的基站，无线保真(wireless fidelity，WiFi)系统中的接入节点，无线中继节点，无线回传节点等。基站可以是：宏基站，微基站，微微基站，小站，中继站，或，气球站等。多个基站可以支持上述提及的同一种技术的网络，也可以支持上述提及的不同技术的网络。基站可以包含一个或多个共站或非共站的收发点(transmission receiving point，TRP)。
终端设备：是一种具有无线收发功能的设备。终端设备可以部署在陆地上，包括室内或室外、手持、穿戴或车载；也可以部署在水面上(如轮船等)；还可以部署在空中(例如飞机、气球和卫星上等)。所述终端设备可以是手机(mobile phone)、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial control)中的无线终端、车载终端设备、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端设备、智 能电网(smart grid)中的无线终端设备、运输安全(transportation safety)中的无线终端设备、智慧城市(smart city)中的无线终端设备、智慧家庭(smart home)中的无线终端设备、可穿戴终端设备等。本申请实施例所涉及的终端设备还可以称为终端、用户设备(user equipment，UE)、接入终端设备、车载终端、工业控制终端、UE单元、UE站、移动站、移动台、远方站、远程终端设备、移动设备、UE终端设备、无线通信设备、UE代理或UE装置等。终端设备也可以是固定的或者移动的。
确认模式(acknowledged mode，AK)：终端设备接收到网络设备发送的数据包之后，终端设备向网络设备发送成功响应(或者称为确认信息)，以指示终端设备成功的接收到了数据包。在该种模式下，网络设备可以确定终端设备成功接收到了哪些数据包，以及没有接收到哪些数据包。
非确认模式(unacknowledged mode，UK)：终端设备接收到网络设备发送的数据包之后，终端设备不向网络设备发送成功响应。在该种模式下，网络设备无法确定终端设备接收到哪些数据包，以及没有接收到哪些数据包。
发送缓存：在网络设备向终端设备发送数据包之后，网络设备将该数据包存储至发送缓存中，若网络设备接收到了终端设备的成功响应，以指示终端设备成功接收到了该数据包，则网络设备在发送缓存中删除该数据包。
数据包的标识：数据包的标识是指能够标识该数据包的标识，可以是某协议层数据包的序号或计数值，例如，分组数据汇聚协议(packet data convergence protocol，PDCP)协议层的序号或计数值。
下面，结合图1，对发送缓存进行说明。
图1为本申请实施例提供的发送缓存的示意图。请参见图1，假设终端设备的发送缓存中最多可以存储5个数据包。在时刻1之前，假设终端设备的发送缓存中存储着数据包1、数据包2和数据包3。在时刻1，假设网络设备接收到了终端设备发送的数据包1对应的成功响应，以及网络设备发送了数据包4，则终端设备在发送缓存中删除数据包1，并在发送缓存中存储数据包4，此时，发送缓存中包括数据包2、数据包3和数据包4。在时刻2，假设网络设备接收到了终端设备发送的数据包3对应的成功响应，则终端设备在发送缓存中删除数据包3，此时，发送缓存中包括数据包2和数据包4。
需要说明的是，在非确认模式下，发送缓存中存储网络设备最近发送的N个数据包，N为发送缓存中最大可存储的数据包的个数。例如，若N为5， 则发送缓存中存储网络设备最近发送的5个数据包。
下面，结合图2，对本申请实施例所适用的通信系统进行说明。
图2为本申请实施例提供的一种通信系统的架构图。请参见图2，包括网络设备201、网络设备202和终端设备203。网络设备201服务的小区为小区1，网络设备202服务的小区为小区2。在实际应用过程中，网络设备201可以从小区1切换至小区2。
为了便于理解，下面，结合图3，对终端设备进行网络切换的过程进行说明。
图3为本申请实施例提供的网络切换方法的流程示意图。请参见图3，该方法可以包括：
S301、源网络设备向终端设备发送测量配置信息。
测量配置信息中可以包括至少一个测量事件，该至少一个测量事件是指终端设备待进行测量的事件。
例如，测量事件可以包括事件A3、事件A5等。事件A3是指，邻小区的信号质量比服务小区的信号质量高出一定阈值。事件A5是指，服务小区的信号质量小于阈值1，且邻小区的信号质量大于阈值2。
S302、终端设备向源网络设备发送测量报告。
终端设备可以先进行小区测量得到测量报告，再向源网络设备发送测量报告。
终端设备可以周期性向源网络设备发送测量报告，或者，终端设备可以在测量事件被满足时向源网络设备发送测量报告。例如，假设测量事件包括事件A3，则终端设备测量得到邻小区的信号质量比服务小区的信号质量高出一定阈值时，终端设备向源网络设备发送测量报告。例如，假设测量事件包括事件A5，则终端设备测量得到服务小区的信号质量小于阈值1，且邻小区的信号质量大于阈值2时，终端设备向源网络设备发送测量报告。
S303、源网络设备确定将终端设备切换至目标网络设备。
源网络设备可以根据测量报告和无线资源管理(radio resource management，RRM)确定将终端设备切换至目标网络设备。
S304、源网络设备向目标网络设备发送切换请求消息。
切换请求消息用于请求将终端设备切换至目标网络设备，切换请求消息中可以包括终端设备的上下文等信息。
S305、目标网络设备向源网络设备发送切换请求确认消息。
切换请求确认消息用于指示目标网络设备同意将终端设备切换至目标网络设备。切换请求切换消息中还可以包括：终端设备在目标网络设备服务的目标小区中进行随机接入的资源配置信息。
S306、源网络设备向目标网络设备进行数据反传(data forwarding)。
源网络设备可以根据本申请实施例所示的方法确定至少一个数据包，并向目标网络设备发送该至少一个数据包，具体过程可以参见下述实施例，此处不再进行赘述。
S307、源网络设备向目标网络设备发送序列号(sequence number，SN)状态(status)信息。
SN status可以指示源网络设备已经向终端设备发送了哪些数据包。
S308、源网络设备向终端设备发送无线资源控制(Radio Resource Control，RRC)重配置(reconfiguration)消息。
RRC重配置(RRC reconfiguration)消息中包括切换命令信息。
S309、终端设备与源网络设备断开连接，并接入到目标网络设备。
S310、终端设备向目标网络设备发送RRC重配置完成(RRC reconfiguration complete)消息。
S311、目标网络设备向接入和移动性管理功能(access and mobility function，AMF)实体发送路径切换请求消息。
S312、AMF实体向目标网络设备发送路径切换确认消息。
S313、目标网络设备向源网络设备发送终端上下文释放消息。
S314、源网络设备释放终端设备上下文。
在相关技术中，在终端设备203从小区1切换至小区2的之前，终端设备203与网络设备201之间建立无线连接，在网络切换过程中，终端设备203与网络设备201断开连接，并与网络设备202建立连接。网络设备201和网络设备202可以同时提供MBS服务，即，网络设备201和网络设备202可以同时向其小区内的终端设备广播或者组播某一业务的数据包，网络设备201和网络设备202发送数据包的进度可能不同，若网络设备202发送数据包的进度大于网络设备201发送数据包的进度，终端设备从小区1切换至小区2之后，终端设备可能无法收到业务的部分数据包。例如，网络设备201发送到第20个数据包时，网络设备202可能已经发送到第28个数据包，则终端 设备从小区1切换至小区2之后，终端设备可能无法接收到第21至第27个数据包，或者终端设备可能无法接收到更多的数据包。由上可知，在网络切换过程中，可能会出现下行数据包的丢失，导致网络切换的可靠性较差。
在本申请实施例中，为了解决上述技术问题，在终端设备进行网络切换的过程中(例如，在图3实施例中的S304-S306步骤中)，第一网络设备(源网络设备)可以确定在网络切换过程中可能丢失的数据包，并向第二网络设备(目标网络设备)发送可能丢失的数据包，以使第二网络设备向终端设备再次发送可能丢失的数据包，进而减少数据包的丢失，进而提高网络切换的可靠性。
下面，通过具体实施例对本申请实施例所示的技术方案进行详细说明。需要说明的是，下面几个实施例可以独立存在，也可以相互结合。对于相同或相似的内容，在不同的实施例中不再重复说明。
图4为本申请实施例提供的一种数据传输方法的流程示意图。请参见图4，该方法可以包括：
S401、第一网络设备获取至少一个第一数据包。
在本申请所涉及的实施例中，第一网络设备为终端设备当前接入的网络设备，第二网络设备为终端设备待切换至的网络设备。即，第一网络设备为终端设备设备进行网络切换之前接入的网络设备，还可以称为源网络设备；第二网络设备为终端设备进行网络切换之后接入的网络设备，还可以称为目标网络设备。
在图3所示的网络切换过程中，可以在S306所示的步骤中执行图4所示的实施例。
至少一个第一数据包为第一业务中的数据包，第一网络设备和第二网络设备均可以发送第一业务中的数据包。例如，第一网络设备可以向其服务的小区中的终端设备组播或者广播第一业务中的数据包，第二网络设备可以向其服务的小区中的终端设备组播或者广播第一业务中的数据包，第一网络设备和第二网络设备发送数据包的进度可能不同。
至少一个数据包为终端设备在进行网络切换(从第一网络设备切换至第二网络设备)过程中可能丢失的数据包，换句话说，至少一个数据包为终端设备在进行网络切换过程中丢失概率大于预设阈值的数据包，其中，丢失的数据包是指终端设备无法接收到的数据包。至少一个第一数据包为根据第一 网络设备和第二网络设备发送第一业务的进度信息确定得到的。源网络设备和目标网络设备的传输模式可以为AM模式或者UM模式，当源网络设备和目标网络设备的传输模式不同时，第一网络设备获取至少一个第一数据包的过程也不同，在下述实施例中进行说明，此处不再进行赘述。
可选的，至少一个第一数据包包括：在第一网络设备向第二网络设备发送切换请求消息之前，第一网络设备未成功发送、且第二网络设备已成功发送的数据包。在切换过程中，若第一网络设备未成功发送某数据包，则终端设备无法从第一网络设备成功接收该数据包，若第二网络设备已成功发送该数据包，则终端设备切换至第二网络设备之后，第二网络设备也不再发送该数据包，导致终端设备也无法从第二网络设备成功接收该数据包，因此，在网络切换过程中，若第一网络设备未成功发送某数据包、且第二网络设备已成功发送该数据包，则终端设备无法成功接收到该数据包，导致该数据包发生丢失。当源网络设备和目标网络设备的传输模式(AM或者UM)不同时，至少一个第一数据包中包括的内容不同，在下述实施例中进行说明，此处不再进行赘述。
需要说明的是，未成功发送的数据包包括：已经发送且没有发送成功的数据包，和/或，没有发送的数据包。
S402、第一网络设备向第二网络设备发送至少一个第一数据包。
S403、第二网络设备向终端设备发送至少一个第一数据包。
在终端设备接入第二网络设备之后，第二网络设备向终端设备发送至少一个第一数据包。
第二网络设备可以通过如下两种方式向终端设备发送至少一个第一数据包：
第一种实现方式：
若目标网络设备为指组播/广播方式的无线承载(MBS point to multipoint radio bearer，MRB)，则目标网络设备为终端设备配置MRB对应的单播方式的数据无线承载(data radio bearer，DRB)，并通过DRB向终端设备发送至少一个第一数据包。在目标网络设备通过DRB向终端设备发送完成至少一个第一数据包之后，目标网络设备停止在DRB上进行数据传输。
在该种方式中，目标网络设备可以在切换请求确认消息中携带目标网络设备的MRB(与源网络设备的MRB对应)及DRB的配置信息。
第二种实现方式：
若目标网络设备为MRB，则目标网络设备可以为终端设备配置专门的MRB的临时传输资源，并通过该专门的MRB的临时传输资源向终端设备发送至少一个第一数据包。例如，目标网络设备可以配置额外的物理下行共享信道(physical downlink shared channel，PDSCH)资源，并通过该PDSCH资源向终端设备发送至少一个第一数据包。目标网络设备可以在多播控制信道(multicast control channel，MCCH)信道中指示该PDSCH资源的位置，以使终端在该PDSCH资源的位置接收至少一个第一数据包。
在本申请实施例中，在终端设备进行网络切换的过程中，第一网络设备可以确定在网络切换过程中可能丢失的至少一个第一数据包，该至少一个第一数据包为根据第一网络设备和第二网络设备发送第一业务的进度信息确定得到的，第一网络设备向第二网络设备发送该至少一个第一数据包，以使第二网络设备向终端设备发送该至少一个第一数据包，进而减少数据包的丢失，进而提高网络切换的可靠性。
在上述任意一个实施例的基础上，第一网络设备可以根据第一网络设备和第二网络设备发送第一业务的进度确定至少一个第一数据包，或者，可以由第二网络设备根据第一网络设备和第二网络设备发送第一业务的进度确定至少一个第一数据包的标识，并向第一网络设备发送至少一个第一数据包的标识，以使第一网络设备根据至少一个第一数据包的标识确定至少一个第一数据包。下面，分别通过图5-图6所示的实施例，对该两种可行的实现方式进行说明。
图5为本申请实施例提供的另一种数据传输方法的流程示意图。请参见图5，该方法可以包括：
S501、第一网络设备获取第一网络设备发送第一业务的第一进度信息、以及第二网络设备发送第一业务的第二进度信息。
第一进度信息用于指示第一网络设备对第一业务中的数据包的发送进度，例如，第一进度信息可以指示第一网络设备成功发送第一业务中的哪些数据包，以及还可以指示未成功发送第一业务中的哪些数据包。当第一网络设备和第二网络设备的传输模式(AM或者UM)不同时，第一进度信息中包括的内容不同，在下述实施例中进行说明，此处不再进行赘述。
第二进度信息用于指示第二网络设备对第一业务中的数据包的发送进度， 例如，第二进度信息可以指示第二网络设备成功发送第一业务中的哪些数据包，以及还可以指示未成功发送第一业务中的哪些数据包。当第一网络设备和第二网络设备的传输模式(AM或者UM)不同时，第二进度信息中包括的内容不同，在下述实施例中进行说明，此处不再进行赘述。
第二网络设备在向第一网络设备发送切换请求确认消息时，可以在切换请求确认消息中携带第二进度信息，以使第一网络设备在切换请求确认消息中获取第二进度信息。
S502、第一网络设备根据第一进度信息和第二进度信息，判断是否进行数据反传。
若是，则执行S503-S505。
若否，则执行S506。
第一网络设备根据第一进度信息和第二进度信息，判断第二网络设备对第一业务传输的进度是否大于第一网络设备对第一业务的传输进度，若是，则确定进行数据反传，若否，则确定不进行数据反传。或者，
第一网络设备可以根据第一进度信息和第二进度信息，判断终端设备从第一网络设备切换至第二网络设备之后，是否会出现数据包的丢失，若是，则确定进行数据反传，若否，则确定不进行数据反传。
S503、第一网络设备根据第一进度信息和第二进度信息，确定至少一个第一数据包。
当源网络设备和目标网络设备的传输模式(AM或者UM)不同时，第一网络设备根据第一进度信息和第二进度信息确定至少一个第一数据包的过程不同，以及至少一个第一数据包中包括的内容不同，在下述实施例中进行说明，此处不再进行赘述。
S504、第一网络设备向第二网络设备发送至少一个第一数据包。
S505、第二网络设备向终端设备发送至少一个第一数据包。
需要说明的是，S505的执行过程可以参见S403的执行过程，此处不再进行赘述。
S506、第一网络设备不进行数据反传。
可选的，若第一网络设备不进行数据反传之后，第一网络设备可以执行图3实施例中的S307。
在图5所示的实施例中，第一网络设备可以根据第一网络设备和第二网 络设备发送第一业务的进度信息，确定是否需要进行数据反传，在确定需要进行数据反传时，第一网络设备可以根据第一网络设备和第二网络设备发送第一业务的进度信息，确定网络切换过程中可能丢失的至少一个第一数据包，并向第二网络设备发送至少一个第一数据包，以使终端设备切换至第二网络设备之后，第二网络设备可以向终端设备发送至少一个第一数据包，以减少网络切换过程中数据包的丢失，进而提高网络切换的可靠性。
图6为本申请实施例提供的又一种数据传输方法的流程示意图。请参见图6，该方法可以包括：
S601、第二网络设备获取第一网络设备发送第一业务的第一进度信息、以及第二网络设备发送第一业务的第二进度信息。
第一进度信息和第二进度信息的相关描述可以参见S501，此处不再进行赘述。
第一网络设备在向第二网络设备发送切换请求消息时，可以在切换请求消息中携带第一进度信息，以使第二网络设备可以在切换请求消息中获取第一进度信息。
S602、第二网络设备根据第一进度信息和第二进度信息，确定是否进行数据反传。
若是，则执行S603-S606。
若否，则执行S607-S608。
需要说明的是，S602的执行过程可以参见S601的执行过程，此处不再进行赘述。
S603、第二网络设备向第一网络设备发送第二进度信息。
可选的，第二网络设备可以向第一网络设备发送切换请求确认消息，切换请求确认消息中包括第二进度信息。
S604、第一网络设备根据第一进度信息和第二进度信息，确定至少一个第一数据包。
需要说明的是，S604的执行过程可以参见S503的执行过程，此处不再进行赘述。
S605、第一网络设备向第二网络设备发送至少一个第一数据包。
S606、第二网络设备向终端设备发送至少一个第一数据包。
需要说明的是，S606的执行过程可以参见S403的执行过程，此处不再进 行赘述。
S607、第二网络设备向第一网络设备发送指示信息。
其中，指示信息用于指示第一网络设备不进行数据反传。
可选的，第二网络设备可以向第一网络设备发送切换请求确认消息，切换请求确认消息中包括指示信息。
S608、第一网络设备不进行数据反传。
可选的，若第一网络设备不进行数据反传之后，第一网络设备可以执行图3实施例中的S307。
在图6所示的实施例中，第二网络设备可以根据第一网络设备和第二网络设备发送第一业务的进度信息，确定是否需要进行数据反传，在确定需要进行数据反传时，第二网络设备可以向第一网络设备发送第二网络设备发送第一业务的进度信息，第一网络设备可以根据第一网络设备和第二网络设备发送第一业务的进度信息，确定网络切换过程中可能丢失的至少一个第一数据包，并向第二网络设备发送至少一个第一数据包，以使终端设备切换至第二网络设备之后，第二网络设备可以向终端设备发送至少一个第一数据包，以减少网络切换过程中数据包的丢失，进而提高网络切换的可靠性。
在图5或者图6所示的实施例中，可选的，当确定需要进行数据反传时，还可以由第二网络设备确定至少一个第一数据包。在一个可能的实现方式中，第二网络设备可以向第一网络设备发送至少一个第一数据包的标识，以使第一网络设备根据至少一个第一数据包的标识向第二网络设备发送至少一个第一数据包，第二网络设备再向终端设备发送至少一个第一数据包。在另一种可能的实现方式中，第二网络设备确定得到至少一个第一数据包之后，若第二网络设备中缓存有该至少一个第一数据包，则第二网络设备可以在终端设备切换至第二网络设备之后，向终端设备发送该至少一个第一数据包。
在上述任意一个实施例的基础上，第一网络设备和第二网络设备的传输模式可以为RLC AM或者RLC UM，当第一网络设备和第二网络设备的模式不同时，第一进度信息、第二进度信息、判断是否进行数据反传、以及至少一个第一数据包均可能不同，下面，分别进行说明，可以至少包括如下四种情况：
第一种情况：第一网络设备的传输模式为RLC AM，第二网络设备的传输模式为RLC AM；
第一进度信息包括如下至少一种：第一标识或者第一网络设备已发送的数据包的发送状态，第一标识为第一网络设备已经成功发送的连续数据包的最大标识，发送状态为发送成功或者发送失败。
第一网络设备已成功发送的数据包是指，第一网络设备已接收到成功响应的数据包。即，第一网络设备发送了数据包之后，若接收到终端设备发送的该数据包对应的成功响应，则第一网络设备成功发送该数据包。
例如，假设第一网络设备已发送数据包1、数据包2、数据包3、数据包4和数据包5，且第一网络设备已接收到数据包1、数据包2和数据包5对应的成功响应，则数据包3和数据包4为未成功发送的数据包。在该种情况下，第一进度信息可以包括数据包2的标识，第一进度信息还可以包括上述5个数据包的发送状态或者数据包3、数据包4和数据包5的发送状态。
第二进度信息包括：第二标识，第二标识为第二网络设备已经成功发送的连续数据包的最大标识。
例如，假设第二网络设备已发送13个数据包，且第二网络设备未接收到数据包11和数据包12对应的成功响应，第二网络设备接收到其它11个数据包对应的成功响应，即，第二网络设备已经成功发送连续数据包为数据包1-数据包10，则第二标识为数据包10的标识。
第一网络设备或者第二网络设备可以通过如下方式确定是否进行数据反传：判断第二标识是否大于第一标识；若是，则确定进行数据反传：若否，则确定不进行数据反传。
至少一个第一数据包包括：标识在第一标识范围内且未被第一网络设备成功发送的数据包，第一标识范围为：大于第一标识且小于或等于第二标识的范围。
下面，结合图7，通过具体示例，对第一种情况进行说明。
图7为本申请实施例提供的一种数据传输示意图。请参见图7，第一网络设备的传输模式为AM，第二网络设备的传输模式为AM。第一网络设备向其服务的小区1发送(MRB或者DRB)第一业务的数据包，第二网络设备向其服务的小区2发送(MRB或者DRB)第二业务的数据包。
假设第一网络设备已经向小区1的终端设备(UE)发送数据包1至数据包5，且第一网络设备已经接收到了数据包1、数据包2和数据包5的成功响应，即，第一网络设备已经成功发送数据包1、数据包2和数据包5，第一网 络设备未成功发送数据包3和数据包4。
假设第二网络设备已经向小区2的终端设备(UE)发送数据包1至数据包13，且第一网络设备已经接收到了数据包1至数据包10、以及数据包13的成功响应，即，第一网络设备已经成功发送数据包1至数据包10、以及数据包13，第一网络设备未成功发送数据包11和数据包12。
第一进度信息可以包括：数据包2的标识(SN＝2)(第一网络设备已经成功发送的连续数据包的最大标识)、数据包3的发送状态(发送失败)、数据包4的发送状态(发送失败)、数据包5的状态信息(发送成功)。
第二进度信息可以包括：数据包10的标识(SN＝10)(第二网络设备已经成功发送的连续数据包的最大标识)。
由于第二网络设备已经成功发送的连续数据包的最大标识(SN＝10)，大于第一网络设备已经成功发送的连续数据包的最大标识(SN＝2)，则确定需要进行数据反传，第一网络设备确定至少一个第一数据包包括：数据包3至数据包4，以及数据包6至数据包10，即，至少一个第一数据包的标识包括：3,4,6,7,8,9,10。
第一网络设备可以向第二网络设备发送数据包3至数据包4，以及数据包6至数据包10，在终端设备切换至第二网络设备之后，第二网络设备向终端设备发送数据包3至数据包4，以及数据包6至数据包10。
在上述过程中，在终端设备从第一网络设备切换至第二网络设备的过程中，由于第二网络设备发送第一业务的进度比第一网络设备发送第一业务的进度快，导致网络切换过程中，可能会丢失部分数据包。第一网络设备确定可能丢失的至少一个第一数据包，并向第二网络设备发送至少一个第一数据包，在终端设备切换至第二网络设备之后，第二网络设备可以向终端设备发送至少一个第一数据包，以减少网络切换过程中数据包的丢失，进而提高网络切换的可靠性。
第二种情况：第一网络设备的传输模式为RLC UM，第二网络设备的传输模式为RLC UM；
第一进度信息包括：第三标识，第三标识为第一网络设备已发送的数据包的最大标识。
例如，假设第一网络设备已经发送数据包1至数据包5，则第三标识为数据包5的标识。
第二进度信息包括：第四标识，第四标识为第二网络设备已发送的数据包的最大标识，或者第四标识为第二网络设备的发送缓存中的数据包的最小标识。
例如，假设第二网络设备已发送数据包1至数据包13，发送缓存中缓存的数据包为数据包10至数据包13，则第四标识为数据包13的标识(第二网络设备已发送的数据包的最大标识)，或者第四标识为数据包10的标识(第二网络设备的发送缓存中的数据包的最小标识)。
第一网络设备或者第二网络设备可以通过如下方式确定是否进行数据反传：判断第四标识是否大于第三标识；若是，则确定进行数据反传：若否，则确定不进行数据反传。
至少一个第一数据包包括：标识在第二标识范围内的数据包，第二标识范围为：大于第三标识且小于第四标识的范围。
下面，结合图8，通过具体示例，对第二种情况进行说明。
图8为本申请实施例提供的另一种数据传输示意图。请参见图8，第一网络设备的传输模式为UM，第二网络设备的传输模式为UM。第一网络设备向其服务的小区1发送(MRB或者DRB)第一业务的数据包，第二网络设备向其服务的小区2发送(MRB或者DRB)第二业务的数据包。
假设第一网络设备已经向小区1的终端设备(UE)发送数据包1至数据包5。第二网络设备已经向小区2的终端设备(UE)发送数据包1至数据包13，且第二网络设备的发送缓存中包括数据包10至数据包13。
第一进度信息可以包括：数据包5的标识(SN＝5)(第一网络设备已发送的数据包的最大标识)。
第二进度信息可以包括：数据包13的标识(SN＝13)(第二网络设备已发送的数据包的最大标识)。
由于第二网络设备已发送的数据包的最大标识(SN＝13)大于第一网络设备已发送的数据包的最大标识(SN＝5)，则确定需要进行数据反传，第一网络设备确定至少一个第一数据包包括：数据包6至数据包12。
第一网络设备可以向第二网络设备发送数据包6至数据包12，在终端设备切换至第二网络设备之后，第二网络设备向终端设备发送数据包6至数据包12。
在上述过程中，在终端设备从第一网络设备切换至第二网络设备的过程 中，由于第二网络设备发送第一业务的进度比第一网络设备发送第一业务的进度快，导致网络切换过程中，可能会丢失部分数据包。第一网络设备确定可能丢失的至少一个第一数据包，并向第二网络设备发送至少一个第一数据包，在终端设备切换至第二网络设备之后，第二网络设备可以向终端设备发送至少一个第一数据包，以减少网络切换过程中数据包的丢失，进而提高网络切换的可靠性。
第三种情况：第一网络设备的传输模式为RLC UM，第二网络设备的传输模式为RLC AM；
第一进度信息包括：第三标识，第三标识为第一网络设备已发送的数据包的最大标识。
在该种情况下，第一进度信息可以参见第二种情况中第一进度信息的描述，此处不再进行赘述。
第二进度信息包括：所述第二标识为所述第二网络设备已经成功发送的连续数据包的最大标识。
在该种情况下，第二进度信息可以参见第一种情况中第二进度信息的描述，此处不再进行赘述。
第一网络设备或者第二网络设备可以通过如下方式确定是否进行数据反传：判断第二标识是否大于第三标识；若是，则确定进行数据反传：若否，则确定不进行数据反传。
至少一个第一数据包包括：标识在第三标识范围内的数据包，第三标识范围为：大于第三标识且小于或等于第二标识的范围。
下面，结合图9，通过具体示例，对第三种情况进行说明。
图9为本申请实施例提供的又一种数据传输示意图。请参见图9，第一网络设备的传输模式为UM，第二网络设备的传输模式为AM。第一网络设备向其服务的小区1发送(MRB或者DRB)第一业务的数据包，第二网络设备向其服务的小区2发送(MRB或者DRB)第二业务的数据包。
假设第一网络设备已经向小区1的终端设备(UE)发送数据包1至数据包5。
假设第二网络设备已经向小区2的终端设备(UE)发送数据包1至数据包13，且第一网络设备已经接收到了数据包1至数据包10、以及数据包13的成功响应，即，第一网络设备已经成功发送数据包1至数据包10、以及数 据包13，第一网络设备未成功发送数据包11和数据包12。
第一进度信息可以包括：数据包5的标识(SN＝5)(第一网络设备已发送的数据包的最大标识)。
第二进度信息可以包括：数据包10的标识(SN＝10)(第二网络设备已经成功发送的连续数据包的最大标识)。
由于所第二网络设备已经成功发送的连续数据包的最大标识(SN＝10)，大于第一网络设备已发送的数据包的最大标识(SN＝5)，则确定需要进行数据反传，第一网络设备确定至少一个第一数据包包括：数据包6至数据包10，即，至少一个第一数据包的标识包括：6,7,8,9,10。
第一网络设备可以向第二网络设备发送数据包6至数据包10，在终端设备切换至第二网络设备之后，第二网络设备向终端设备发送数据包6至数据包10。
在上述过程中，在终端设备从第一网络设备切换至第二网络设备的过程中，由于第二网络设备发送第一业务的进度比第一网络设备发送第一业务的进度快，导致网络切换过程中，可能会丢失部分数据包。第一网络设备确定可能丢失的至少一个第一数据包，并向第二网络设备发送至少一个第一数据包，在终端设备切换至第二网络设备之后，第二网络设备可以向终端设备发送至少一个第一数据包，以减少网络切换过程中数据包的丢失，进而提高网络切换的可靠性。
第四种情况：第一网络设备的传输模式RLC AM，第二网络设备的传输模式为RLC UM；
第一进度信息包括如下至少一种：第一标识或者第一网络设备已发送的数据包的发送状态，第一标识为第一网络设备已经成功发送的连续数据包的最大标识，发送状态为发送成功或者发送失败。
在该种情况下，第一进度信息可以参见第一种情况中第一进度信息的描述，此处不再进行赘述。
第二进度信息包括：第四标识，第四标识为第二网络设备已发送的数据包的最大标识，或者第四标识为第二网络设备的发送缓存中的数据包的最小标识。
在该种情况下，第二进度信息可以参见第二种情况中第二进度信息的描述，此处不再进行赘述。
第一网络设备或者第二网络设备可以通过如下方式确定是否进行数据反传：判断第四标识是否大于第一标识；若是，则确定进行数据反传：若否，则确定不进行数据反传。
至少一个第一数据包包括：标识在第四标识范围内且未被第一网络设备成功发送的数据包，第四标识范围为：大于第一标识且小于第四标识的范围。
下面，结合图10，通过具体示例，对第三种情况进行说明。
图10为本申请实施例提供的再一种数据传输示意图。请参见图10，第一网络设备的传输模式为AM，第二网络设备的传输模式为UM。第一网络设备向其服务的小区1发送(MRB或者DRB)第一业务的数据包，第二网络设备向其服务的小区2发送(MRB或者DRB)第二业务的数据包。
假设第一网络设备已经向小区1的终端设备(UE)发送数据包1至数据包5，且第一网络设备已经接收到了数据包1、数据包2和数据包5的成功响应，即，第一网络设备已经成功发送数据包1、数据包2和数据包5，第一网络设备未成功发送数据包3和数据包4。
假设第二网络设备已经向小区2的终端设备(UE)发送数据包1至数据包13，且第二网络设备的发送缓存中包括数据包10至数据包13。
第一进度信息可以包括：数据包2的标识(SN＝2)(第一网络设备已成功发送的连续数据包的最大标识)、数据包3的状态(发送失败)、数据包4的发送状态(发送失败)、数据包5的状态信息(发送成功)。
第二进度信息可以包括：数据包13的标识(SN＝13)(第二网络设备已发送的数据包的最大标识)。
由于第二网络设备已发送的数据包的最大标识大于第一网络设备已成功发送的连续数据包的最大标识，则确定需要进行数据反传，由于数据包4发送失败，数据包5发送失败，因此，可以确定至少一个数据包包括：数据包3-数据包4，以及数据包6-数据包12。
第一网络设备可以向第二网络设备发送数据包3-数据包4，以及数据包6-数据包12，在终端设备切换至第二网络设备之后，第二网络设备向终端设备发送数据包3-数据包4，以及数据包6-数据包12。
在上述过程中，在终端设备从第一网络设备切换至第二网络设备的过程中，由于第二网络设备发送第一业务的进度比第一网络设备发送第一业务的进度快，导致网络切换过程中，可能会丢失部分数据包。第一网络设备确定 可能丢失的至少一个第一数据包，并向第二网络设备发送至少一个第一数据包，在终端设备切换至第二网络设备之后，第二网络设备可以向终端设备发送至少一个第一数据包，以减少网络切换过程中数据包的丢失，进而提高网络切换的可靠性。
图11为本申请实施例提供的一种数据传输装置的结构示意图。该数据处理装置10可以设置在第一网络设备中。请参见图11，该数据处理装置10可以包括：处理模块11和发送模块12，其中，
所述处理模块11用于，获取第一业务的至少一个第一数据包，所述至少一个第一数据包为根据第一网络设备和第二网络设备发送所述第一业务的进度信息确定得到的，所述第一网络设备为所述终端设备网络切换前接入的网络设备，所述第二网络设备为所述终端设备网络切换后接入的网络设备；
所述发送模块12用于，向所述第二网络设备发送所述至少一个第一数据包，所述至少一个数据包为所述第二网络设备待向所述终端设备发送的数据包。
本申请实施例提供的数据处理装置可以执行上述方法实施例所示的技术方案，其实现原理以及有益效果类似，此处不再进行赘述。
在一种可能的实施方式中，所述至少一个第一数据包包括：
在所述第一网络设备向所述第二网络设备发送切换请求消息之前，所述第一网络设备未成功发送、且所述第二网络设备已成功发送的数据包。
在一种可能的实施方式中，所述处理模块11具体用于：
获取所述第一网络设备发送所述第一业务的第一进度信息、以及所述第二网络设备发送所述第一业务的第二进度信息；
根据所述第一进度信息和所述第二进度信息，确定是否进行数据反传；
在确定进行数据反传时，根据所述第一网络设备根据所述第一进度信息和所述第二进度信息，获取所述至少一个第一数据包。
在一种可能的实施方式中，
在一种可能的实施方式中，所述第一网络设备的传输模式为无线链路控制RLC确认模式AM，所述第二网络设备的传输模式为RLC AM；
所述第一进度信息包括如下至少一种：第一标识或者所述第一网络设备已发送的数据包的发送状态，所述第一标识为所述第一网络设备已经成功发送的连续数据包的最大标识，所述发送状态为发送成功或者发送失败；
所述第二进度信息包括：第二标识，所述第二标识为所述第二网络设备已经成功发送的连续数据包的最大标识。
在一种可能的实施方式中，所述处理模块11具体用于：
判断所述第二标识是否大于所述第一标识；
若是，则确定进行数据反传：
若否，则确定不进行数据反传。
在一种可能的实施方式中，所述至少一个第一数据包包括：
标识在第一标识范围内且未被所述第一网络设备成功发送的数据包，所述第一标识范围为：大于所述第一标识且小于或等于所述第二标识的范围。
在一种可能的实施方式中，所述第一网络设备的传输模式为RLC非确认模式UM，所述第二网络设备的传输模式为RLC UM；
所述第一进度信息包括：第三标识，所述第三标识为所述第一网络设备已发送的数据包的最大标识；
所述第二进度信息包括：第四标识，所述第四标识为所述第二网络设备已发送的数据包的最大标识，或者所述第四标识为所述第二网络设备的发送缓存中的数据包的最小标识。
在一种可能的实施方式中，所述处理模块11具体用于：
判断所述第四标识是否大于所述第三标识；
若是，则确定进行数据反传：
若否，则确定不进行数据反传。
在一种可能的实施方式中，所述至少一个第一数据包包括：
标识在第二标识范围内的数据包，所述第二标识范围为：大于所述第三标识且小于所述第四标识的范围。
在一种可能的实施方式中，所述第一网络设备的传输模式为RLC UM，所述第二网络设备的传输模式为RLC AM；
所述第一进度信息包括：第三标识，所述第三标识为所述第一网络设备已发送的数据包的最大标识；
所述第二进度信息包括：第二标识，所述第二标识为所述第二网络设备已经成功发送的连续数据包的最大标识。
在一种可能的实施方式中，所述处理模块11具体用于：
判断所述第二标识是否大于第三标识；
若是，则确定进行数据反传：
若否，则确定不进行数据反传。
在一种可能的实施方式中，所述至少一个第一数据包包括：
标识在第三标识范围内的数据包，所述第三标识范围为：大于所述第三标识且小于或等于所述第二标识的范围。
在一种可能的实施方式中，所述第一网络设备的传输模式为RLC AM，所述第二网络设备的传输模式为RLC UM；
所述第一进度信息包括如下至少一种：第一标识或者所述第一网络设备已发送的数据包的发送状态，所述第一标识为所述第一网络设备已经成功发送的连续数据包的最大标识，所述发送状态为发送成功或者发送失败；
所述第二进度信息包括：第四标识，所述第四标识为所述第二网络设备已发送的数据包的最大标识，或者所述第四标识为所述第二网络设备的发送缓存中的数据包的最小标识。
在一种可能的实施方式中，所述处理模块11具体用于：
判断所述第四标识是否大于所述第一标识；
若是，则确定进行数据反传：
若否，则确定不进行数据反传。
在一种可能的实施方式中，所述至少一个第一数据包包括：
标识在第四标识范围内且未被所述第一网络设备成功发送的数据包，所述第四标识范围为：大于所述第一标识且小于所述第四标识的范围。
图12为本申请实施例提供的另一种数据传输装置的结构示意图。在图11所示实施例的基础上，请参见图12，数据处理装置10还可以包括接收模块13，其中，
所述接收模块13用于，接收所述第二网络设备发送的所述至少一个第一数据包的标识；
所述处理模块11用于，根据所述至少一个第一数据包的标识，获取所述至少一个第一数据包。
本申请实施例提供的数据处理装置可以执行上述方法实施例所示的技术方案，其实现原理以及有益效果类似，此处不再进行赘述。
图13为本申请实施例提供的再一种数据传输装置的结构示意图。该数据处理装置20可以设置在第二网络设备中。请参见图13，该数据处理装置20 可以包括：接收模块21和发送模块22，其中，
所述接收模块21用于，接收第一网络设备发送的至少一个第一数据包，所述至少一个第一数据包为根据所述第一网络设备和第二网络设备发送第一业务的进度信息确定得到的，所述第一网络设备为所述终端设备网络切换前接入的网络设备，所述第二网络设备为所述终端设备网络切换后接入的网络设备；
所述发送模块22用于，向终端设备发送所述至少一个第一数据包。
本申请实施例提供的数据传输装置可以执行上述方法实施例所示的技术方案，其实现原理以及有益效果类似，此处不再进行赘述。
在一种可能的实施方式中，所述第一数据包包括：
在所述第一网络设备向所述第二网络设备发送切换请求消息之前，所述第一网络设备未成功发送、且所述第二网络设备已成功发送的数据包。
图14为本申请实施例提供的又一种数据传输装置的结构示意图。在图13所示实施例的基础上，请参见图14，数据处理装置20还包括处理模块23，所述处理模块23用于：
在所述接收模块21接收第一网络设备发送的至少一个第一数据包之前，获取所述第一网络设备发送所述第一业务的第一进度信息、以及所述第二网络设备发送所述第一业务的第二进度信息；
根据所述第一进度信息和所述第二进度信息，确定进行数据反传。
在一种可能的实施方式中，所述第一网络设备的传输模式无线链路控制RLC确认模式AM，所述第二网络设备的传输模式为RLC AM；
所述第一进度信息包括如下至少一种：第一标识或者所述第一网络设备已发送的数据包的发送状态，所述第一标识为所述第一网络设备已经成功发送的连续数据包的最大标识，所述发送状态为发送成功或者发送失败；
所述第二进度信息包括：第二标识，所述第二标识为所述第二网络设备已经成功发送的连续数据包的最大标识。
在一种可能的实施方式中，所述处理模块23用于：
判断所述第二标识是否大于所述第一标识；
若是，则确定进行数据反传。
在一种可能的实施方式中，所述至少一个第一数据包包括：
标识在第一标识范围内且未被所述第一网络设备成功发送的数据包，所 述第一标识范围为：大于所述第一标识且小于或等于所述第二标识的范围。
在一种可能的实施方式中，所述第一网络设备的传输模式为RLC非确认模式UM，所述第二网络设备的传输模式为RLC UM；
所述第一进度信息包括：第三标识，所述第三标识为所述第一网络设备已发送的数据包的最大标识；
所述第二进度信息包括：第四标识，所述第四标识为所述第二网络设备已发送的数据包的最大标识，或者所述第四标识为所述第二网络设备的发送缓存中的数据包的最小标识。
在一种可能的实施方式中，所述处理模块23具体用于：
判断所述第四标识是否大于所述第三标识；
若是，则确定进行数据反传。
在一种可能的实施方式中，所述至少一个第一数据包包括：
标识在第二标识范围内的数据包，所述第二标识范围为：大于所述第三标识且小于所述第四标识的范围。
在一种可能的实施方式中，所述第一网络设备的传输模式为RLC UM，所述第二网络设备的传输模式为RLC AM；
所述第一进度信息包括：第三标识，所述第三标识为所述第一网络设备已发送的数据包的最大标识；
所述第二进度信息包括：第二标识，所述第二标识为所述第二网络设备已经成功发送的连续数据包的最大标识。
在一种可能的实施方式中，所述处理模块23具体用于：
判断所述第二标识是否大于第三标识；
若是，则确定进行数据反传。
在一种可能的实施方式中，所述至少一个第一数据包包括：
标识在第三标识范围内的数据包，所述第三标识范围为：大于所述第三标识且小于或等于所述第二标识的范围。
在一种可能的实施方式中，所述第一网络设备的传输模式为RLC AM，所述第二网络设备的传输模式为RLC UM；
所述第一进度信息包括如下至少一种：第一标识或者所述第一网络设备已发送的数据包的发送状态，所述第一标识为所述第一网络设备已经成功发送的连续数据包的最大标识，所述发送状态为发送成功或者发送失败；
所述第二进度信息包括：第四标识，所述第四标识为所述第二网络设备已发送的数据包的最大标识，或者所述第四标识为所述第二网络设备的发送缓存中的数据包的最小标识。
在一种可能的实施方式中，所述处理模块23具体用于：
判断所述第四标识是否大于所述第一标识；
若是，则确定进行数据反传。
在一种可能的实施方式中，所述至少一个第一数据包包括：
标识在第四标识范围内且未被所述第一网络设备成功发送的数据包，所述第四标识范围为：大于所述第一标识且小于所述第四标识的范围。
在一种可能的实施方式中，所述第二网络设备为组播广播方式的无线承载MRB；所述发送模块具体用于：
通过所述MRB对应的单播方式的无线承载DRB向所述终端设备发送所述至少一个第一数据包；或者，
通过MRB的临时传输资源向所述终端设备发送所述至少一个第一数据包。
本申请实施例提供的数据传输装置可以执行上述方法实施例所示的技术方案，其实现原理以及有益效果类似，此处不再进行赘述。
图15为本申请实施例提供的一种网络设备的结构示意图。请参见图15网络设备30可以包括：收发器31、存储器32、处理器33。收发器31可包括：发射器和/或接收器。该发射器还可称为发送器、发射机、发送端口或发送接口等类似描述，接收器还可称为接收器、接收机、接收端口或接收接口等类似描述。示例性地，收发器31、存储器32、处理器33，各部分之间通过总线34相互连接。
存储器32用于存储程序指令；
处理器33用于执行该存储器所存储的程序指令，用以使得网络设备30执行上述任一所示的数据处理方法。
收发器31用于执行上述数据处理方法中网络设备30的收发功能。
本申请实施例提供一种计算机可读存储介质，所述计算机可读存储介质中存储有计算机执行指令，当所述计算机执行指令被处理器执行时用于实现上述数据处理方法。
本申请实施例还可提供一种计算机程序产品，该计算机程序产品可以由 处理器执行，在计算机程序产品被执行时，可实现上述任一所示的网络设备执行的数据处理方法。
本申请实施例的网络设备、计算机可读存储介质及计算机程序产品，可执行上述数据处理方法，其具体的实现过程及有益效果参见上述，在此不再赘述。
实现上述各方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成。前述的程序可以存储于一可读取存储器中。该程序在执行时，执行包括上述各方法实施例的步骤；而前述的存储器(存储介质)包括：只读存储器(英文：read-only memory，缩写：ROM)、RAM、快闪存储器、硬盘、固态硬盘、磁带(英文：magnetic tape)、软盘(英文：floppy disk)、光盘(英文：optical disc)及其任意组合。
本申请实施例是参照根据本申请实施例的方法、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。应理解可由计算机程序指令实现流程图和/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。可提供这些计算机程序指令到通用计算机、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单元以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理单元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。
这些计算机程序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计算机可读存储器中，使得存储在该计算机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。
这些计算机程序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申请实施例进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请实施例的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。
在本申请中，术语“包括”及其变形可以指非限制性的包括；术语“或”及其变形可以指“和/或”。本本申请中术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。本申请中，“多个”是指两个或两个以上。“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。

Claims (37)

  1. 一种数据传输方法，其特征在于，包括：
    第一网络设备获取第一业务的至少一个第一数据包，所述至少一个第一数据包为根据所述第一网络设备和第二网络设备发送所述第一业务的进度信息确定得到的，所述第一网络设备为终端设备网络切换前接入的网络设备，所述第二网络设备为所述终端设备网络切换后接入的网络设备；
    所述第一网络设备向所述第二网络设备发送所述至少一个第一数据包，所述至少一个数据包为所述第二网络设备待向所述终端设备发送的数据包。
  2. 根据权利要求1所述的方法，其特征在于，所述至少一个第一数据包包括：
    在所述第一网络设备向所述第二网络设备发送切换请求消息之前，所述第一网络设备未成功发送、且所述第二网络设备已成功发送的数据包。
  3. 根据权利要求1或2所述的方法，其特征在于，所述第一网络设备获取至少一个第一数据包，包括：
    第一网络设备获取所述第一网络设备发送所述第一业务的第一进度信息、以及所述第二网络设备发送所述第一业务的第二进度信息；
    所述第一网络设备根据所述第一进度信息和所述第二进度信息，确定是否进行数据反传；
    在所述第一网络设备确定进行数据反传时，所述第一网络设备根据所述第一网络设备根据所述第一进度信息和所述第二进度信息，获取所述至少一个第一数据包。
  4. 根据权利要求3所述的方法，其特征在于，所述第一网络设备的传输模式为无线链路控制RLC确认模式AM，所述第二网络设备的传输模式为RLC AM；
    所述第一进度信息包括如下至少一种：第一标识或者所述第一网络设备已发送的数据包的发送状态，所述第一标识为所述第一网络设备已经成功发送的连续数据包的最大标识，所述发送状态为发送成功或者发送失败；
    所述第二进度信息包括：第二标识，所述第二标识为所述第二网络设备已经成功发送的连续数据包的最大标识。
  5. 根据权利要求4所述的方法，其特征在于，所述第一网络设备根据所 述第一进度信息和所述第二进度信息，确定是否进行数据反传，包括：
    所述第一网络设备判断所述第二标识是否大于所述第一标识；
    若是，则所述第一网络设备确定进行数据反传：
    若否，则所述第一网络设备确定不进行数据反传。
  6. 根据权利要求4或5所述的方法，其特征在于，所述至少一个第一数据包包括：
    标识在第一标识范围内且未被所述第一网络设备成功发送的数据包，所述第一标识范围为：大于所述第一标识且小于或等于所述第二标识的范围。
  7. 根据权利要求3所述的方法，其特征在于，所述第一网络设备的传输模式为RLC非确认模式UM，所述第二网络设备的传输模式为RLC UM；
    所述第一进度信息包括：第三标识，所述第三标识为所述第一网络设备已发送的数据包的最大标识；
    所述第二进度信息包括：第四标识，所述第四标识为所述第二网络设备已发送的数据包的最大标识，或者所述第四标识为所述第二网络设备的发送缓存中的数据包的最小标识。
  8. 根据权利要求7所述的方法，其特征在于，所述第一网络设备根据所述第一进度信息和所述第二进度信息，确定是否进行数据反传，包括：
    所述第一网络设备判断所述第四标识是否大于所述第三标识；
    若是，则所述第一网络设备确定进行数据反传：
    若否，则所述第一网络设备确定不进行数据反传。
  9. 根据权利要求7或8所述的方法，其特征在于，所述至少一个第一数据包包括：
    标识在第二标识范围内的数据包，所述第二标识范围为：大于所述第三标识且小于所述第四标识的范围。
  10. 根据权利要求3所述的方法，其特征在于，所述第一网络设备的传输模式为RLC UM，所述第二网络设备的传输模式为RLC AM；
    所述第一进度信息包括：第三标识，所述第三标识为所述第一网络设备已发送的数据包的最大标识；
    所述第二进度信息包括：第二标识，所述第二标识为所述第二网络设备已经成功发送的连续数据包的最大标识。
  11. 根据权利要求10所述的方法，其特征在于，所述第一网络设备根据 所述第一进度信息和所述第二进度信息，确定是否进行数据反传，包括：
    所述第一网络设备判断所述第二标识是否大于第三标识；
    若是，则所述第一网络设备确定进行数据反传：
    若否，则所述第一网络设备确定不进行数据反传。
  12. 根据权利要求11所述的方法，其特征在于，所述至少一个第一数据包包括：
    标识在第三标识范围内的数据包，所述第三标识范围为：大于所述第三标识且小于或等于所述第二标识的范围。
  13. 根据权利要求3所述的方法，其特征在于，所述第一网络设备的传输模式为RLC AM，所述第二网络设备的传输模式为RLC UM；
    所述第一进度信息包括如下至少一种：第一标识或者所述第一网络设备已发送的数据包的发送状态，所述第一标识为所述第一网络设备已经成功发送的连续数据包的最大标识，所述发送状态为发送成功或者发送失败；
    所述第二进度信息包括：第四标识，所述第四标识为所述第二网络设备已发送的数据包的最大标识，或者所述第四标识为所述第二网络设备的发送缓存中的数据包的最小标识。
  14. 根据权利要求13所述的方法，其特征在于，所述第一网络设备根据所述第一进度信息和所述第二进度信息，确定是否进行数据反传，包括：
    所述第一网络设备判断所述第四标识是否大于所述第一标识；
    若是，则所述第一网络设备确定进行数据反传：
    若否，则所述第一网络设备确定不进行数据反传。
  15. 根据权利要求14所述的方法，其特征在于，所述至少一个第一数据包包括：
    标识在第四标识范围内且未被所述第一网络设备成功发送的数据包，所述第四标识范围为：大于所述第一标识且小于所述第四标识的范围。
  16. 根据权利要求1或2所述的方法，其特征在于，所述第一网络设备获取至少一个第一数据包，包括：
    所述第一网络设备接收所述第二网络设备发送的所述至少一个第一数据包的标识；
    所述第一网络设备根据所述至少一个第一数据包的标识，获取所述至少一个第一数据包。
  17. 一种数据传输方法，其特征在于，包括：
    第二网络设备接收第一网络设备发送的至少一个第一数据包，所述至少一个第一数据包为根据所述第一网络设备和第二网络设备发送第一业务的进度信息确定得到的，所述第一网络设备为终端设备网络切换前接入的网络设备，所述第二网络设备为所述终端设备网络切换后接入的网络设备；
    所述第二网络设备向终端设备发送所述至少一个第一数据包。
  18. 根据权利要求17所述的方法，其特征在于，所述第一数据包包括：
    在所述第一网络设备向所述第二网络设备发送切换请求消息之前，所述第一网络设备未成功发送、且所述第二网络设备已成功发送的数据包。
  19. 根据权利要求17或18所述的方法，其特征在于，所述第二网络设备接收第一网络设备发送的至少一个第一数据包之前，还包括：
    所述第二网络获取所述第一网络设备发送所述第一业务的第一进度信息、以及所述第二网络设备发送所述第一业务的第二进度信息；
    所述第二网络设备根据所述第一进度信息和所述第二进度信息，确定进行数据反传。
  20. 根据权利要求19所述的方法，其特征在于，所述第一网络设备的传输模式无线链路控制RLC确认模式AM，所述第二网络设备的传输模式为RLC AM；
    所述第一进度信息包括如下至少一种：第一标识或者所述第一网络设备已发送的数据包的发送状态，所述第一标识为所述第一网络设备已经成功发送的连续数据包的最大标识，所述发送状态为发送成功或者发送失败；
    所述第二进度信息包括：第二标识，所述第二标识为所述第二网络设备已经成功发送的连续数据包的最大标识。
  21. 根据权利要求20所述的方法，其特征在于，所述第二网络设备根据所述第一进度信息和所述第二进度信息，确定进行数据反传，包括：
    所述第二网络设备判断所述第二标识是否大于所述第一标识；
    若是，则所述第二网络设备确定进行数据反传。
  22. 根据权利要求20或21所述的方法，其特征在于，所述至少一个第一数据包包括：
    标识在第一标识范围内且未被所述第一网络设备成功发送的数据包，所述第一标识范围为：大于所述第一标识且小于或等于所述第二标识的范围。
  23. 根据权利要求19所述的方法，其特征在于，所述第一网络设备的传输模式为RLC非确认模式UM，所述第二网络设备的传输模式为RLC UM；
    所述第一进度信息包括：第三标识，所述第三标识为所述第一网络设备已发送的数据包的最大标识；
    所述第二进度信息包括：第四标识，所述第四标识为所述第二网络设备已发送的数据包的最大标识，或者所述第四标识为所述第二网络设备的发送缓存中的数据包的最小标识。
  24. 根据权利要求23所述的方法，其特征在于，所述第二网络设备根据所述第一进度信息和所述第二进度信息，确定进行数据反传，包括：
    所述第二网络设备判断所述第四标识是否大于所述第三标识；
    若是，则所述第二网络设备确定进行数据反传。
  25. 根据权利要求23或24所述的方法，其特征在于，所述至少一个第一数据包包括：
    标识在第二标识范围内的数据包，所述第二标识范围为：大于所述第三标识且小于所述第四标识的范围。
  26. 根据权利要求19所述的方法，其特征在于，所述第一网络设备的传输模式为RLC UM，所述第二网络设备的传输模式为RLC AM；
    所述第一进度信息包括：第三标识，所述第三标识为所述第一网络设备已发送的数据包的最大标识；
    所述第二进度信息包括：第二标识，所述第二标识为所述第二网络设备已经成功发送的连续数据包的最大标识。
  27. 根据权利要求26所述的方法，其特征在于，所述第二网络设备根据所述第一进度信息和所述第二进度信息，确定进行数据反传，包括：
    所述第二网络设备判断所述第二标识是否大于第三标识；
    若是，则所述第二网络设备确定进行数据反传。
  28. 根据权利要求26或27所述的方法，其特征在于，所述至少一个第一数据包包括：
    标识在第三标识范围内的数据包，所述第三标识范围为：大于所述第三标识且小于或等于所述第二标识的范围。
  29. 根据权利要求19所述的方法，其特征在于，所述第一网络设备的传输模式为RLC AM，所述第二网络设备的传输模式为RLC UM；
    所述第一进度信息包括如下至少一种：第一标识或者所述第一网络设备已发送的数据包的发送状态，所述第一标识为所述第一网络设备已经成功发送的连续数据包的最大标识，所述发送状态为发送成功或者发送失败；
    所述第二进度信息包括：第四标识，所述第四标识为所述第二网络设备已发送的数据包的最大标识，或者所述第四标识为所述第二网络设备的发送缓存中的数据包的最小标识。
  30. 根据权利要求29所述的方法，其特征在于，所述第二网络设备根据所述第一进度信息和所述第二进度信息，确定进行数据反传，包括：
    所述第二网络设备判断所述第四标识是否大于所述第一标识；
    若是，则所述第二网络设备确定进行数据反传。
  31. 根据权利要求29或30所述的方法，其特征在于，所述至少一个第一数据包包括：
    标识在第四标识范围内且未被所述第一网络设备成功发送的数据包，所述第四标识范围为：大于所述第一标识且小于所述第四标识的范围。
  32. 根据权利要求17-31任一项所述的方法，其特征在于，所述第二网络设备为组播广播方式的无线承载MRB；所述第二网络设备向终端设备发送所述至少一个第一数据包，包括：
    所述第二网络设备通过所述MRB对应的单播方式的无线承载DRB向所述终端设备发送所述至少一个第一数据包；或者，
    所述第二网络设备通过MRB的临时传输资源向所述终端设备发送所述至少一个第一数据包。
  33. 一种数据传输装置，其特征在于，包括：处理模块和发送模块，其中，
    所述处理模块用于，获取第一业务的至少一个第一数据包，所述至少一个第一数据包为根据第一网络设备和第二网络设备发送所述第一业务的进度信息确定得到的，所述第一网络设备为终端设备网络切换前接入的网络设备，所述第二网络设备为所述终端设备网络切换后接入的网络设备；
    所述发送模块用于，向所述第二网络设备发送所述至少一个第一数据包，所述至少一个数据包为所述第二网络设备待向所述终端设备发送的数据包。
  34. 一种数据传输装置，其特征在于，包括：接收模块和发送模块，其中，
    所述接收模块用于，接收第一网络设备发送的至少一个第一数据包，所述至少一个第一数据包为根据所述第一网络设备和第二网络设备发送第一业务的进度信息确定得到的，所述第一网络设备为终端设备网络切换前接入的网络设备，所述第二网络设备为所述终端设备网络切换后接入的网络设备；
    所述发送模块用于，向终端设备发送所述至少一个第一数据包。
  35. 一种网络设备，其特征在于，包括：收发器、处理器、存储器；
    所述存储器存储计算机执行指令；
    所述处理器执行所述存储器存储的计算机执行指令，使得所述处理器执行如权利要求1至32任一项所述的数据处理方法。
  36. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有计算机执行指令，当所述计算机执行指令被处理器执行时用于实现权利要求1至32任一项所述的数据处理方法。
  37. 一种计算机程序产品，其特征在于，包括计算机程序，该计算机程序被处理器执行时实现权利要求1至32任一项所述的数据处理方法。
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