WO2019158058A1 - 通信方法、第一终端设备和第二终端设备 - Google Patents

通信方法、第一终端设备和第二终端设备 Download PDF

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Publication number
WO2019158058A1
WO2019158058A1 PCT/CN2019/074900 CN2019074900W WO2019158058A1 WO 2019158058 A1 WO2019158058 A1 WO 2019158058A1 CN 2019074900 W CN2019074900 W CN 2019074900W WO 2019158058 A1 WO2019158058 A1 WO 2019158058A1
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Prior art keywords
terminal device
data packet
interface
layer
pdu
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PCT/CN2019/074900
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English (en)
French (fr)
Inventor
吴义镇
朱元萍
黄亚达
戴明增
王君
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP19754228.5A priority Critical patent/EP3755015A4/en
Publication of WO2019158058A1 publication Critical patent/WO2019158058A1/zh
Priority to US16/991,152 priority patent/US20200374962A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/74—Address processing for routing
    • H04L45/745—Address table lookup; Address filtering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0205—Traffic management, e.g. flow control or congestion control at the air interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/03—Reselecting a link using a direct mode connection
    • H04W36/037—Reselecting a link using a direct mode connection by reducing handover delay, e.g. latency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/23—Manipulation of direct-mode connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H04W4/46—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for vehicle-to-vehicle communication [V2V]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H04W76/16—Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Definitions

  • the present application relates to the field of communications and, more particularly, to a communication method, a first terminal device, and a second terminal device.
  • the Internet of Vehicles uses technologies such as wireless communication to collect information such as vehicles, roads, and the environment. Vehicles and infrastructures are exchanged and shared through vehicle-to-vehicle (V2V) and vehicle-to-route (V2R) information. Intelligent collaboration and cooperation to achieve an integrated network of intelligent traffic management control, vehicle intelligent control and intelligent dynamic information services.
  • V2V vehicle-to-vehicle
  • V2R vehicle-to-route
  • Intelligent collaboration and cooperation to achieve an integrated network of intelligent traffic management control, vehicle intelligent control and intelligent dynamic information services.
  • the vehicle-mounted terminal can transmit sensing information or control messages to the surrounding vehicle-mounted terminals to realize automatic driving or orchestrating of the vehicle.
  • the terminal devices can directly transmit data packets through the direct connection port without the participation of the network device.
  • the performance of transmitting the data packets through the above-mentioned direct connection port is limited, that is, straight.
  • the efficiency with which the connection port transmits data packets limits the performance of the first terminal device transmitting data packets to the second terminal device.
  • the present application provides a communication method, a terminal device, and a network device, which are beneficial to improving the performance of the first terminal device transmitting data packets to the second terminal device.
  • a first aspect provides a communication method, including a first terminal device transmitting, by using a first interface, a first data packet to a second terminal device, where the first interface is the first terminal device and the a communication interface in which the second terminal device directly communicates, or a communication interface in which the first terminal device and the second terminal device communicate directly in the new wireless NR system; the first terminal device passes the second interface to the first interface
  • the second terminal device transmits a second data packet, where the second interface is any one of the following interfaces: a communication interface that the first terminal device communicates with the LTE network device, where the first terminal device communicates with the NR network device a communication interface, a communication interface in which the first terminal device and the second terminal device communicate directly in the LTE system, and a communication interface in which the first terminal device and the second terminal device directly communicate in the NR system, in the LTE system a communication interface in which the first terminal device and the relay terminal device directly communicate, and a communication in which the first terminal device and the relay terminal device communicate directly in the NR
  • the first terminal device is configured to use the second interface to transmit the data packet to the second terminal device, which avoids the prior art, the first terminal device transmits the data packet to the second terminal device through only one interface, and It is beneficial to improve the performance of transmitting data packets between the first terminal device and the second terminal device.
  • the reliability of transmitting the data packet through the communication interface in which the terminal device communicates with the network device is higher than the reliability of transmitting the data packet through the direct connection port communicated between the terminal devices, when the second interface is the first When the terminal device communicates with the LTE network device, or the communication interface between the first terminal device and the NR network device, the reliability of the first terminal device to transmit the data packet to the second terminal device may be further improved.
  • the foregoing first interface may refer to a direct connection port mentioned above for direct communication between terminal devices, for example, a device to device (D2D) interface, or a PC5 interface in a car network.
  • D2D device to device
  • PC5 PC5 interface in a car network.
  • the second interface may be a direct connection mentioned above for direct communication between terminal devices, for example, a D2D interface, or a PC5 interface in a car network.
  • the second interface may be a direct interface that the first terminal device directly communicates with the second terminal device; the second interface may also be that the first terminal device directly communicates with the relay terminal device.
  • the communication interface that is, the first terminal device transmits the data packet to the second terminal device through the direct connection port that communicates with the relay terminal device.
  • the first data packet is a D2D data packet that is transmitted by the first terminal device to the second terminal device.
  • the first data packet and the second data packet are the same data packet in the same data stream.
  • a data packet to be transmitted is copied into two data packets, that is, a first data packet and a second data packet, and are respectively transmitted through the first interface and the second interface, as compared with the prior art.
  • a scheme transmitted only through one interface it is advantageous to improve the reliability of packet transmission.
  • the first data packet and the second data packet are different data packets in the same data stream.
  • different data packets belonging to the same data stream are respectively transmitted through the first interface and the second interface, and the first data packet and the second data packet are transmitted through only one interface in the prior art. It is beneficial to reduce the delay of transmitting the first data packet and the second data packet.
  • the first data packet and the second data packet are aggregated by a same target protocol layer entity in the second terminal device.
  • the first terminal device is configured with a first routing layer, where the first routing layer is located in a packet data convergence protocol PDCP layer of the first terminal device, and Before the first terminal device transmits the second data packet to the second terminal device by using the second interface, the method further includes: a terminal device adds a first routing header to the second protocol data unit PDU in the first routing layer, where the second PDU is a PDU of the second data packet in the PDCP layer of the first terminal device.
  • the first routing header is used to indicate a path for transmitting the second data packet.
  • the second data packet is transmitted by using the routing layer in the first terminal device and the network device, and after receiving the second data packet, the network device may directly forward the second data packet according to the first routing header. Up to the second terminal device, it is advantageous to reduce the delay in generating the second data packet. The network device is prevented from transmitting the second data packet to the core network, resulting in an increase in the delay of transmitting the data packet.
  • the first terminal device is configured with a first adaptation layer, where the first adaptation layer is located at a PDCP layer of the first terminal device, and the first Between the RLC layers of the terminal device, before the first terminal device transmits the first data packet to the second terminal device by using the first interface, the method further includes: the first terminal device is in the first adaptation a layer, the first PDU is added to the first PDU, where the first PDU is the PDU of the first data packet in the PDCP layer of the first terminal device, and the first convergence identifier is used to indicate the target protocol layer The entity performs data aggregation on the first data packet.
  • the first terminal device may add a first convergence identifier to the first PDU at the adaptation layer, so that the second terminal device aggregates the first PDU according to the first convergence identifier, and is configured to be configured by using the network device.
  • the interaction process between the first terminal device and the network device is reduced, and the overhead caused by the transmission signaling is reduced.
  • the method before the transmitting the first data packet to the second terminal device by using the first interface, the method further includes: the first terminal device receiving the The first configuration information is used to configure the first terminal device to transmit the first data packet by using the first interface, and transmit the second data packet by using the second interface.
  • the first terminal device is configured by using the first configuration information, the first data packet is transmitted through the first interface, and the second data packet is transmitted through the second interface, in relation to the first terminal device and the first terminal device.
  • the second terminal device adding the adaptation layer, it is advantageous to reduce the modification of the protocol stack in the first terminal device and the second terminal device.
  • the first configuration information carries at least one of the following: the information indicating that the radio bearer corresponding to the first interface is corresponding to the second interface
  • the radio carries the same indication information; the indication information indicating that the destination address of the first data packet is transmitted through the first interface is the same as the destination address of the second data packet transmitted by using the second interface; And indicating the same information indicating that the logical channel corresponding to the first interface is the same as the logical channel corresponding to the second interface.
  • the first terminal is configured with a first aggregation layer and a second routing layer, and the first terminal device transmits the second terminal to the second terminal by using the second interface.
  • the method further includes: the first terminal device acquiring a third PDU from the first aggregation layer, where the third PDU is the PDU of the second data packet in the first convergence layer.
  • the first terminal device adds a second routing header to the third PDU in the second routing layer, where the third PDU is the PDU of the second data packet in the first convergence layer.
  • the second routing header is configured to indicate a path for transmitting the second data packet; the first terminal device transmits the third PDU carrying the second routing header to a PDCP layer of the first terminal.
  • the aggregation of the third PDU by adding the convergence layer in the first terminal device is beneficial to reducing the processing process of the third PDU by the PDCP layer and reducing the complexity of processing the third PDU by the PDCP layer.
  • the first terminal is configured with a second adaptation layer, before the first terminal device transmits the first data packet to the second terminal by using the first interface,
  • the method further includes: the first terminal device acquiring a fourth PDU from the first aggregation layer, where the fourth PDU is a PDU of the first data packet in the first convergence layer; the first terminal The device adds, at the second adaptation layer, a third convergence identifier to the fourth PDU, where the third convergence identifier is used to indicate a data flow to which the first data packet belongs; the first terminal device will carry The fourth PDU of the second convergence identifier is transmitted to a PDCP layer of the first terminal.
  • the first terminal device may add a third convergence identifier to the fourth PDU in the adaptation layer, so that the second terminal device aggregates the fourth PDU according to the third aggregation identifier, and is configured to be configured by using the network device.
  • the interaction process between the first terminal device and the network device is reduced, and the overhead caused by the transmission signaling is reduced.
  • the method before the transmitting the first data packet to the second terminal by using the first interface, the method further includes: receiving, by the first terminal device, the network device The second configuration information is used to configure the first terminal device to transmit the first data packet by using the first interface, and transmit the second data packet by using the second interface.
  • the first terminal device is configured by using the second configuration information, the first data packet is transmitted through the first interface, and the second data packet is transmitted through the second interface, in relation to the first terminal device and the first terminal device.
  • the second terminal device adding the adaptation layer it is advantageous to reduce the modification of the protocol stack in the first terminal device and the second terminal device.
  • the second configuration information carries at least one of the following: the information indicating that the radio bearer corresponding to the first interface corresponds to the second interface
  • the radio carries the same indication information; the indication information indicating that the destination address of the first data packet is transmitted through the first interface is the same as the destination address of the second data packet transmitted by using the second interface; And indicating the same information indicating that the logical channel corresponding to the first interface is the same as the logical channel corresponding to the second interface.
  • the method before the first terminal device transmits the first data packet to the second terminal device by using the first interface, the method further includes: receiving, by the first terminal device The multi-interface transmission indication information sent by the network device, where the multi-interface transmission indication information is used to instruct the first terminal device to transmit the first data packet and the second data to the second terminal device by using two interfaces.
  • the packet, and/or the multi-interface transmission indication information is further used to indicate whether the data carried in the first data packet and the second data packet are the same.
  • the method before the first terminal device receives the multi-interface transmission indication information sent by the network device, the method further includes: the first terminal device reporting the The network device sends a multi-interface transmission request, and the multi-interface transmission request is used to request the network device to transmit the first data packet and the second data packet to the second terminal device through multiple interfaces.
  • the first terminal device receives the multi-interface transmission indication information sent by the network device, where the first terminal device receives the system information block SIB sent by the network device. And the SIB carries the multi-interface transmission indication information; or the first terminal device receives the dedicated signaling sent by the network device, where the dedicated signaling carries the multi-interface transmission indication information.
  • the second aspect provides a communication method, including: receiving, by the second terminal device, the first data packet sent by the first terminal device by using the first interface, where the first interface is the first terminal device in the Long Term Evolution LTE system and a communication interface directly communicated by the second terminal device, or a communication interface in which the first terminal device and the second terminal device directly communicate in a new wireless NR system; the second terminal device receives the a second data packet sent by the first terminal device, where the second interface is any one of the following interfaces: a communication interface that the first terminal device communicates with an LTE network device, the first terminal device and an NR network device a communication interface for communication, a communication interface in which the first terminal device and the second terminal device directly communicate in the LTE system, and a communication interface in which the first terminal device and the second terminal device directly communicate in the NR system, LTE a communication interface in which the first terminal device and the relay terminal device directly communicate, and the first terminal device and the relay terminal device in the NR system directly A communication interface letter.
  • the first terminal device is configured to use the second interface to transmit the data packet to the second terminal device, which avoids the prior art, the first terminal device transmits the data packet to the second terminal device through only one interface, and It is beneficial to improve the performance of transmitting data packets between the first terminal device and the second terminal device.
  • the reliability of transmitting the data packet through the communication interface in which the terminal device communicates with the network device is higher than the reliability of transmitting the data packet through the direct connection port communicated between the terminal devices, when the second interface is the first When the terminal device communicates with the LTE network device, or the communication interface between the first terminal device and the NR network device, the reliability of the first terminal device to transmit the data packet to the second terminal device may be further improved.
  • the foregoing first interface may refer to a direct connection port mentioned above for direct communication between terminal devices, for example, a device to device (D2D) interface, or a PC5 interface in a car network.
  • D2D device to device
  • PC5 PC5 interface in a car network.
  • the second interface may be a direct connection mentioned above for direct communication between terminal devices, for example, a D2D interface, or a PC5 interface in a car network.
  • the second interface may be a direct interface that the first terminal device directly communicates with the second terminal device; the second interface may also be that the first terminal device directly communicates with the relay terminal device.
  • the communication interface that is, the first terminal device transmits the data packet to the second terminal device through the direct connection port that communicates with the relay terminal device.
  • the first data packet is a D2D data packet that is transmitted by the first terminal device to the second terminal device.
  • the first data packet and the second data packet are the same data packet in the same data stream.
  • a data packet to be transmitted is copied into two data packets, that is, a first data packet and a second data packet, and are respectively transmitted through the first interface and the second interface, as compared with the prior art.
  • a scheme transmitted only through one interface it is advantageous to improve the reliability of packet transmission.
  • the first data packet and the second data packet are different data packets in the same data stream.
  • different data packets belonging to the same data stream are respectively transmitted through the first interface and the second interface, and the first data packet and the second data packet are transmitted through only one interface in the prior art. It is beneficial to reduce the delay of transmitting the first data packet and the second data packet.
  • the first data packet and the second data packet are aggregated by a same target protocol layer entity in the second terminal device.
  • the target protocol layer entity is a packet data convergence protocol PDCP entity
  • the second terminal device is configured with a first routing layer
  • the first routing layer is located in the Between the PDCP layer of the second terminal device and the radio link layer control protocol RLC layer of the second terminal device, the second terminal device receives, by using the second interface, the first terminal device to transmit the second data packet, including The second terminal device decapsulates the second protocol data unit PDU carrying the first routing header at the first routing layer, and transmits the second PDU to the PDCP entity, the second The PDU is a PDU of the second data packet in the PDCP layer of the first terminal device, and the first routing header is used to indicate a path for transmitting the second data packet.
  • the aggregation of the second PDU by the PDCP layer itself in the second terminal device, the repeated detection, the repeated discarding function, and the aggregation of the second PDU are beneficial to reducing the modification of the existing protocol stack.
  • the second data packet is transmitted by using the routing layer in the second terminal device and the network device, and after receiving the second data packet, the network device may directly forward the second data packet according to the first routing header. Up to the second terminal device, it is advantageous to reduce the delay in generating the second data packet. The network device is prevented from transmitting the second data packet to the core network, resulting in an increase in the delay of transmitting the data packet.
  • the second terminal device is configured with a first adaptation layer, where the first adaptation layer is located at a PDCP layer and the second terminal of the second terminal device Between the RLC layers of the terminal device, the second terminal device receives the first data packet sent by the first terminal device by using the first interface, where the second terminal device is in the first adaptation layer, according to the first And transmitting, by the first PDU, the first PDU to the PDCP entity, where the first PDU is a PDU of the first data packet at a PDCP layer of the first terminal device, and a first convergence identifier And configured to indicate that the first data packet is aggregated at the target protocol layer entity.
  • the second terminal device aggregates the first PDU according to the first convergence identifier, and reduces the interaction between the first terminal device and the network device with respect to the solution for configuring the replacement adaptation layer by using the network device.
  • the interaction process reduces the overhead caused by signaling.
  • the method before the second terminal device receives the first data packet sent by the first terminal device by using the first interface, the method further includes: the second terminal device And receiving the first configuration information that is sent by the network device, where the first configuration information is used to configure the first terminal device to transmit the first data packet by using the first interface, and transmit the first data packet by using the second interface Two packets.
  • the second terminal device is configured by using the first configuration information, the first data packet is received by the first interface, and the second data packet is received by the second interface, with respect to the first terminal device and the first terminal device.
  • the second terminal device adding the adaptation layer it is advantageous to reduce the modification of the protocol stack in the first terminal device and the second terminal device.
  • the first configuration information carries at least one of the following: the information indicating that the radio bearer corresponding to the first interface corresponds to the second interface
  • the radio carries the same indication information; the indication information indicating that the destination address of the first data packet is transmitted through the first interface is the same as the destination address of the second data packet transmitted by using the second interface; And indicating the same information indicating that the logical channel corresponding to the first interface is the same as the logical channel corresponding to the second interface.
  • the second terminal device is configured with a first convergence layer and a second routing layer, where the target protocol layer entity is the first convergence entity of the first convergence layer.
  • the third PDU is aggregated by adding an aggregation layer to the second terminal device, which is beneficial to reducing the processing process of the third PDU by the PDCP layer and reducing the complexity of processing the third PDU by the PDCP layer.
  • the second terminal device is configured with a second adaptation layer, where the second terminal device receives the first data packet sent by the first terminal device by using the first interface, The second terminal device acquires a fourth PDU from a PDCP layer of the second terminal device, where the fourth PDU is a PDU of the first data packet at a PDCP layer of the first terminal device; The second terminal device transmits, at the second adaptation layer, the fourth PDU to the first convergence entity according to the third convergence identifier carried by the fourth PDU, where the third convergence identifier is used to indicate the a data stream to which the first data packet belongs; the second terminal device performs data aggregation on the first data packet by the first aggregation entity at the first aggregation layer.
  • the second terminal device may aggregate the fourth PDU according to the third convergence identifier at the adaptation layer, and reduce the first terminal device with respect to the solution for configuring the replacement adaptation layer by using the network device.
  • the interaction process with the network device reduces the overhead caused by the transmission signaling.
  • the method before the receiving, by the first interface, the first terminal device to transmit the first data packet, the method further includes: receiving, by the second terminal device, the network device The second configuration information is used to configure the first terminal device to transmit the first data packet by using the first interface, and transmit the second data packet by using the second interface.
  • the first terminal device is configured by using the second configuration information, the first data packet is transmitted through the first interface, and the second data packet is transmitted through the second interface, in relation to the first terminal device and the first terminal device.
  • the second terminal device adding the adaptation layer it is advantageous to reduce the modification of the protocol stack in the first terminal device and the second terminal device.
  • the second configuration information carries at least one of the following: the information indicating that the radio bearer corresponding to the first interface corresponds to the second interface
  • the radio carries the same indication information; the indication information indicating that the destination address of the first data packet is transmitted through the first interface is the same as the destination address of the second data packet transmitted by using the second interface; And indicating the same information indicating that the logical channel corresponding to the first interface is the same as the logical channel corresponding to the second interface.
  • the third aspect provides a communication method, including: the network device sends the multi-interface transmission indication information to the first terminal device, where the multi-interface transmission indication information is used to indicate that the first terminal device sends the The second terminal device transmits the first data packet and the second data packet, and/or the multi-interface transmission indication information is further used to indicate whether the data carried in the first data packet and the second data packet are the same.
  • the function of transmitting the data packet through the multiple interfaces is configured for the first terminal device by using the network device, which is beneficial to improving the performance of the first terminal device for transmitting the first data packet and the second data packet.
  • the first data packet and the second data packet are the same data packet in the same data stream.
  • the first data packet and the second data packet are different data packets in the same data stream.
  • the method before the network device sends the multi-interface transmission indication information to the first terminal device, the method further includes: the network device receiving, sending, by the first terminal device The multi-interface transmission request is used to request the network device to transmit the first data packet and the second data packet to the second terminal device through multiple interfaces.
  • the network device receives the multi-interface transmission request sent by the first terminal device, where the network device receives the system information block sent by the first terminal device The SIB, the SIB carries the multi-interface transmission indication information; or the network device receives the dedicated signaling sent by the first terminal device, where the dedicated signaling carries the multi-interface transmission indication information.
  • the multiple interface includes a first interface and a second interface
  • the method further includes: first configuration information that is sent by the network device to the first terminal device The first configuration information is used to configure the first terminal device to transmit the first data packet by using the first interface, and transmit the second data packet by using the second interface.
  • the first configuration information carries at least one of the following: the information indicating that the radio bearer corresponding to the first interface corresponds to the second interface
  • the radio carries the same indication information; the indication information indicating that the destination address of the first data packet is transmitted through the first interface is the same as the destination address of the second data packet transmitted by using the second interface; And indicating indication information that the logical channel corresponding to the first interface is the same as the logical channel corresponding to the second interface.
  • a first terminal device comprising a module for performing the first aspect or any of the possible implementations of the first aspect.
  • a second terminal device comprising a module for performing the second aspect or any of the possible implementations of the first aspect.
  • a network device comprising means for performing the third aspect or each of the possible implementations of any of the first aspects.
  • a first terminal device having the function of implementing the terminal device in the method design of the above first aspect.
  • These functions can be implemented in hardware or in software by executing the corresponding software.
  • the hardware or software includes one or more units corresponding to the functions described above.
  • a second terminal device having the function of implementing the terminal device in the method design of the second aspect above.
  • These functions can be implemented in hardware or in software by executing the corresponding software.
  • the hardware or software includes one or more units corresponding to the functions described above.
  • a network device having the function of implementing the network device in the method design of the above third aspect.
  • These functions can be implemented in hardware or in software by executing the corresponding software.
  • the hardware or software includes one or more units corresponding to the functions described above.
  • a first terminal device including a transceiver, a processor, and a memory.
  • the processor is for controlling transceiver transceiver signals for storing a computer program for calling and running the computer program from the memory such that the terminal device performs the method of the first aspect above.
  • a second terminal device including a transceiver, a processor, and a memory.
  • the processor is for controlling transceiver transceiver signals for storing a computer program for calling and running the computer program from the memory such that the terminal device performs the method of the second aspect above.
  • a second terminal device including a transceiver, a processor, and a memory.
  • the processor is for controlling transceiver transceiver signals for storing a computer program for calling and running the computer program from the memory such that the terminal device performs the method of the second aspect above.
  • a network device including a transceiver, a processor, and a memory.
  • the processor is for controlling transceiver transceiver signals for storing a computer program for calling and running the computer program from memory such that the network device performs the method of the third aspect above.
  • a communication device may be the first terminal device in the above method design or the chip disposed in the terminal device.
  • the communication device includes a memory for storing computer executable program code, a communication interface, and a processor coupled to the memory and the communication interface.
  • the program code stored in the memory includes instructions which, when executed by the processor, cause the communication device to perform the method performed by the terminal device in any of the possible aspects of the first aspect or the first aspect described above.
  • a communication device may be a second terminal device in the above method design, or a chip disposed in the terminal device.
  • the communication device includes a memory for storing computer executable program code, a communication interface, and a processor coupled to the memory and the communication interface.
  • the program code stored in the memory includes instructions which, when executed by the processor, cause the communication device to perform the method performed by the terminal device in any of the possible aspects of the second aspect or the second aspect described above.
  • a communication device may be a network device in the above method design, or a chip disposed in the network device.
  • the communication device includes a memory for storing computer executable program code, a communication interface, and a processor coupled to the memory and the communication interface.
  • the program code stored in the memory includes instructions which, when executed by the processor, cause the communication device to perform the method performed by the network device in any of the possible aspects of the third aspect or the third aspect above.
  • a computer program product comprising: computer program code, causing a computer to perform the method of the above aspects when the computer program code is run on a computer.
  • a computer readable medium storing program code for causing a computer to perform the method of the above aspects when the computer program code is run on a computer.
  • a chip system comprising a processor for implementing, by the first terminal device or the second terminal device, functions involved in the above aspects, for example, generating, receiving, transmitting, or processing the above Data and/or information involved in the method.
  • the chip system further comprises a memory for storing necessary program instructions and data of the terminal device.
  • the chip system can be composed of chips, and can also include chips and other discrete devices.
  • a chip system comprising a processor for supporting a network device to implement the functions involved in the above aspects, for example, generating, receiving, transmitting, or processing data involved in the above method And / or information.
  • the chip system further includes a memory for storing necessary program instructions and data of the network device.
  • the chip system can be composed of chips, and can also include chips and other discrete devices.
  • a twenty-first aspect a communication system, comprising: the first terminal device and the second terminal device.
  • FIG. 1 is a wireless communication system 100 to which an embodiment of the present application is applied.
  • FIG. 2 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • FIG. 3 is a schematic block diagram of a protocol stack architecture in a communication system according to an embodiment of the present application.
  • FIG. 4 is a schematic block diagram of a package structure of a PDU according to an embodiment of the present application.
  • FIG. 5 is a schematic block diagram of a protocol stack architecture in a communication system according to an embodiment of the present application.
  • FIG. 6 is a schematic block diagram showing the architecture of a protocol stack in a communication system according to another embodiment of the present application.
  • FIG. 7 is a schematic block diagram of a protocol stack architecture in a communication system according to another embodiment of the present application.
  • FIG. 8 is a schematic block diagram of a package structure of a PDU according to another embodiment of the present application.
  • FIG. 9 is a schematic block diagram of a protocol stack architecture in a communication system according to an embodiment of the present application.
  • FIG. 10 is a schematic block diagram showing the architecture of a protocol stack in a communication system according to an embodiment of the present application.
  • FIG. 11 is a schematic block diagram of a protocol stack architecture based on a dual direct interface according to an embodiment of the present application.
  • FIG. 12 is a schematic block diagram showing a protocol stack architecture based on a dual direct interface according to another embodiment of the present application.
  • FIG. 13 is a schematic block diagram of a first terminal device according to an embodiment of the present application.
  • FIG. 14 is a schematic block diagram of a first terminal device according to another embodiment of the present application.
  • FIG. 15 is a schematic block diagram of a second terminal device according to an embodiment of the present application.
  • FIG. 16 is a schematic block diagram of a second terminal device according to another embodiment of the present application.
  • FIG. 1 For the sake of understanding, the scenario applicable to the embodiment of the present application is first introduced in conjunction with FIG. 1 .
  • FIG. 1 is a wireless communication system 100 to which an embodiment of the present application is applied.
  • the wireless communication system 100 can include a network device 110 and a terminal device.
  • Network device 110 may be a device that communicates with a terminal device.
  • Network device 110 may provide communication coverage for a particular geographic area and may communicate with terminal devices located within the coverage area.
  • FIG. 1 exemplarily shows one network device and two terminals (a first terminal device 120 and a second terminal device 130).
  • the wireless communication system 100 may include a plurality of network devices and each of the network devices Other numbers of terminals may be included in the coverage, which is not limited in this embodiment of the present application.
  • the wireless communication system 100 may further include other network entities, such as a network controller, a mobility management entity, and the like.
  • network entities such as a network controller, a mobility management entity, and the like.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced Long Term Evolution
  • UMTS Universal Mobile Telecommunication System
  • 5G 5G
  • the terminal may include, but is not limited to, a terminal device applied to the Internet of Vehicles, for example, may be a terminal device connected to the car network, for example, may be an in-vehicle terminal device; Including but not limited to mobile station (Mobile Station, MS), mobile terminal (Mobile Terminal), mobile telephone (Mobile Telephone), user equipment (User Equipment, UE), mobile device (handset) and portable equipment (portable equipment), etc.
  • the terminal device can communicate with one or more core networks via a Radio Access Network (RAN), for example, the terminal device can be a mobile phone (or "cellular" phone), a computer with wireless communication function, etc.
  • the terminal device can also be a portable, pocket-sized, handheld, computer-integrated or in-vehicle mobile device.
  • the network device may be an access network device, for example, may be a base station, a Transmit and Receive Point (TRP) or an access point, and the base station may be a base station in GSM or CDMA (Base Transceiver Station).
  • BTS may also be a base station (NodeB) in WCDMA
  • NodeB may also be an evolved base station (evolved Node B, eNB or e-NodeB) in LTE, or may be an NR or 5G base station (gNB), this application
  • gNB 5G base station
  • the first terminal device 120 can communicate with the second terminal device 130 through a direct connection port, which can be understood as an air interface for direct communication between terminals, for example, D2D interface, or PC5 interface in the car network.
  • a direct connection port can be understood as an air interface for direct communication between terminals, for example, D2D interface, or PC5 interface in the car network.
  • the data transmission between the terminals through the above-mentioned direct connection port can eliminate the network device from participating in the data transmission process, and is beneficial to reducing the delay of data transmission between the terminal devices.
  • the reliability of the data transmission by the direct connection port is not high enough, It is beneficial to improve the reliability of data transmission between terminal devices.
  • the embodiment of the present application provides a communication method, which is beneficial to improving the efficiency of transmitting data packets between terminal devices.
  • FIG. 2 is a schematic flowchart of a communication method according to an embodiment of the present application. It should be understood that the first terminal device shown in FIG. 2 may be the first terminal device shown in FIG. 1 or the chip located on the first terminal device; the second communication device may be the second terminal device shown in FIG. Or a chip located on the second terminal device.
  • the method shown in FIG. 2 includes steps 210 through 240.
  • the first terminal device transmits the first data packet to the second terminal device by using the first interface, where the first interface is a communication interface that is directly communicated between the first terminal device and the second communication device in the long term evolution LTE system. Or a communication interface in which the first terminal device and the second communication device communicate directly in the new wireless NR system.
  • the foregoing first interface may refer to a direct connection port mentioned above for direct communication between terminal devices, for example, a device to device (D2D) interface, or a PC5 interface in a car network.
  • D2D device to device
  • PC5 PC5 interface in a car network.
  • the first data packet is a D2D data packet that is transmitted by the first terminal device to the second terminal device.
  • the first terminal device transmits a second data packet to the second communications device by using a second interface, where the second interface is any one of the following interfaces: the first terminal device communicates with an LTE network device a communication interface, a communication interface in which the first terminal device communicates with the NR network device, a communication interface in which the first terminal device and the second terminal device communicate directly in the LTE system, and the first terminal device in the NR system a communication interface directly communicating with the second terminal device, a communication interface in which the first terminal device and the relay terminal device directly communicate in the LTE system, and the first terminal device and the relay terminal device in the NR system Communication interface for direct communication.
  • the foregoing second interface may be a direct connection port mentioned above for direct communication between terminal devices, for example, a D2D interface, or a PC5 interface in a car network.
  • the second interface may be a direct interface that the first terminal device directly communicates with the second terminal device; the second interface may also be that the first terminal device directly communicates with the relay terminal device.
  • the communication interface that is, the first terminal device transmits the data packet to the second terminal device through the direct connection port that communicates with the relay terminal device.
  • relay terminal device may include one or more terminal devices, which is not specifically limited in this embodiment of the present application.
  • the second interface may also be an interface that the first terminal device communicates with the network device, which is also called a non-direct connection port.
  • the Uu interface For example, the Uu interface. That is, the first terminal device transmits a data packet to the second terminal device through the network device.
  • the second terminal device that receives the second data packet by using the second interface may belong to a terminal device set, that is, the first terminal device transmits the second terminal device.
  • the network device may help the first terminal device to send the second data packet to the terminal device set by multicast or broadcast, where the terminal device set includes the second terminal device.
  • the foregoing first terminal device transmits a data packet to the second terminal device through the network device, and may be specifically classified into the following two communication scenarios.
  • Communication scenario 1 The first terminal device and the second terminal device belong to the same network device.
  • the network device that helps the first terminal device forward the second data packet to the second terminal device is the first terminal device and the second terminal device. Access network equipment.
  • the first terminal device and the second terminal device belong to different network devices.
  • the network device accessed by the first terminal device is referred to as a first network device
  • the network device accessed by the second terminal device is referred to as a second network device.
  • the network device that helps the first terminal device forward the second data packet to the second terminal device may include the first network device and the second network device.
  • the first terminal device is configured to use the second interface to transmit the data packet to the second terminal device, which avoids the prior art, the first terminal device transmits the data packet to the second terminal device through only one interface, and It is beneficial to improve the performance of transmitting data packets between the first terminal device and the second terminal device.
  • the reliability of transmitting the data packet through the communication interface in which the terminal device communicates with the network device is higher than the reliability of transmitting the data packet through the direct connection port communicated between the terminal devices, when the second interface is the first When the terminal device communicates with the LTE network device, or the communication interface between the first terminal device and the NR network device, the reliability of the first terminal device to transmit the data packet to the second terminal device may be further improved.
  • the first data packet and the second data packet are the same data packet in the same data stream.
  • the foregoing first data packet and the second data packet are the same data packet in the same data stream, and the first data packet and the second data packet are originally one data that should be transmitted on the same path through the same interface. package. That is to say, the second data packet can be understood as a data packet generated by copying the first data packet, or the first data packet can be understood as a data packet generated by copying the second data packet.
  • a data packet to be transmitted is copied into two data packets, that is, a first data packet and a second data packet, and are respectively transmitted through the first interface and the second interface, as compared with the prior art.
  • a scheme transmitted only through one interface it is advantageous to improve the reliability of packet transmission.
  • the first data packet and the second data packet are different data packets in the same data stream.
  • the first data packet and the second data packet are different data packets in the same data stream, and it can be understood that the first data packet and the second data packet are originally different data that should be transmitted on the same path through the same interface. package.
  • different data packets belonging to the same data stream are respectively transmitted through the first interface and the second interface, and the first data packet and the second data packet are transmitted through only one interface in the prior art. It is beneficial to reduce the delay of transmitting the first data packet and the second data packet.
  • the first data packet and the second data packet are aggregated by the same target protocol layer entity in the second terminal device. That is to say, in the prior art, the data packets originally transmitted to the same target protocol layer entity through one path are aggregated. In the embodiment of the present application, although the transmission is performed through two different interfaces, the target aggregation layer is finally aggregated. The entity is still the same protocol layer entity.
  • the data packets transmitted through the two interfaces are sent to the same target protocol layer entity for aggregation.
  • the embodiment of the present application improves the existing protocol stack and provides a plurality of different protocol stacks.
  • the architecture of each protocol stack and the manner in which the data packets are transmitted are described in detail below with reference to the accompanying drawings.
  • the first type of protocol stack architecture is applicable to the communication scenario 1 above, and the first interface is a direct connection port for communicating between the first terminal device and the second terminal device, and the second interface is between the first terminal device and the network device.
  • the non-direct connection port of the communication, wherein the protocol stack architecture in the first terminal device, the second terminal device, and the network device is as shown in FIG. 3.
  • FIG. 3 is a schematic block diagram of a protocol stack architecture in a communication system according to an embodiment of the present application.
  • the first terminal device, the second terminal device, and the network device may further include other protocol layers, This embodiment of the present application does not specifically limit this.
  • An adaptation layer (Adaption Layer) is added to the protocol stack structure corresponding to the direct connection port of the first terminal device and the second terminal device, where the adaptation layer can be located in the first terminal device.
  • a routing layer (also referred to as a "first routing layer") is added to the protocol stack structure corresponding to the indirect interface of the first terminal device and the second terminal device.
  • the routing layer may be located between the PDCP layer and the RLC layer of the first terminal device.
  • the network device adds a routing layer to the protocol stack structure corresponding to the indirect interface, where the routing layer in the network device is located at the same location as the routing layer in the first terminal device.
  • the process of transmitting data packets through the first interface and the second interface is described below in conjunction with the protocol stack architecture of the first interface shown in FIG.
  • the specific packet transmission process can be divided into two cases.
  • a protocol data unit (PDU) corresponding to the first data packet is referred to as a “first PDU”
  • a PDU corresponding to the second data packet is referred to as a “second PDU”.
  • Case 1 The first data packet and the second data packet are the same data packet.
  • the first PDU is copied to generate a second PDU, and the second PDU and the first PDU may have the same PDCP sequence number (SN). And transmitting the first PDU to the adaptation layer of the first terminal device, and transmitting the second PDU to the routing layer of the first terminal device.
  • SN PDCP sequence number
  • the protocol layer entity is used to indicate that the first data packet is aggregated.
  • the first routing header is used to indicate a path for transmitting the second data packet
  • the second convergence identifier is used to indicate that data convergence is performed on the second data packet by the target protocol layer entity, or
  • the second convergence identifier is used to indicate a protocol layer entity that aggregates the second data packet.
  • the foregoing adding a first routing header to the second PDU may be understood as encapsulating the second PDU by using a routing-header protocol.
  • the first routing header may include source information (Src Info) and destination information (Dest Info).
  • the first routing header may further include quality of service information (QoS Info). At least one of Time information (Time Info) and Measurement information (Measurement Info), and the specific PDU encapsulation structure can be seen in FIG. 4.
  • the foregoing source information is used to indicate the first terminal device, and specifically may be address information of the first terminal device, such as an Internet Protocol (IP) address, a Media Access Control (MAC) address, and a first Identification information of a terminal device, and the like.
  • the identifier information of the first terminal device may be an International Mobile Subscriber Identification Number (IMSI), or a temporary identifier that may be allocated to the terminal to protect the privacy network, or source terminal location information.
  • IMSI International Mobile Subscriber Identification Number
  • the destination information is used to indicate the second terminal device, and specifically may be the address information of the second terminal device, the second terminal device identifier information, the address information of the terminal device set where the second terminal device is located, or the terminal device where the second terminal device is located. Collection identification information. For example, the IP multicast address corresponding to the terminal device set, the MAC multicast address corresponding to the terminal device set, or the group ID of the terminal device set allocated by the network.
  • the QoS information is used to determine the level of service for transmitting the second PDU, which can be represented by priority.
  • the Time information is used to indicate time information related to the second data packet, for example, the generation time of the second data packet, the expected transmission time of the second data packet, the latest transmission time of the second data packet, and the like.
  • the process of acquiring the destination information by the first terminal device may be indicated by the network device to the first terminal device, or may be obtained by the first terminal device and the second terminal device.
  • the manner in which a terminal device obtains the above-mentioned destination information is not specifically limited.
  • the first PDU carrying the first aggregation identifier and the second PDU carrying the first routing header and the second convergence identifier are respectively transmitted to different RLC entities in the RLC layer of the first terminal device.
  • the network device After receiving the second data packet through the second interface, the network device determines, by using the destination information carried in the second PDU, the second terminal device that receives the second data packet, and the second data packet. Forward to the second terminal device.
  • the second terminal device After receiving the first data packet by using the first interface, the second terminal device decapsulates the first PDU carrying the first aggregation identifier, and transmits the first PDU according to the first convergence identifier to the adaptation layer of the second terminal device A target protocol layer entity that aggregates the first PDU, that is, a PDCP entity.
  • the second terminal device After receiving the second data packet by using the second interface, the second terminal device decapsulates the second PDU carrying the second aggregation identifier at the routing layer of the second terminal device, and transmits the second PDU to the pair according to the second convergence identifier.
  • the target protocol layer entity that the second PDU performs aggregation that is, the PDCP entity.
  • the PDCP entity of the second terminal device aggregates the first PDU and the second PDU.
  • the PDCP entity may discard the first data packet and the first data packet. Any one of the two packets.
  • the protocol stack architecture shown in the embodiment of the present application based on the function of the PDCP layer to aggregate data packets in the existing protocol stack, the first data packet and the second data packet received through the first interface and the second interface are used. Convergence, minor changes to the existing protocol stack.
  • the PDCP layer of the first terminal device two different data packets, the first data packet and the second data packet in the same data stream are respectively transmitted to the adaptation layer and the first terminal device of the first terminal device.
  • the routing layer wherein the sequence number of the first data packet is different from the PDCP sequence number of the second data packet.
  • the process of transmitting a data packet is only slightly different in whether the PDCP layer needs to copy the first data packet to be transmitted.
  • the PDCP layer does not need to execute the data pair again.
  • the process of copying the packet can directly transmit the first data packet and the second data packet to be transmitted.
  • the transmission process is the same, and for the sake of brevity, it will not be described here.
  • the second type of protocol stack architecture is applicable to the communication scenario 2 in the above, and the first interface is a direct connection port for communication between the first terminal device and the second terminal device, and the second interface is communication between the first terminal device and the network device.
  • the protocol stack architecture in the first terminal device, the second terminal device, and the network device is as shown in FIG. 5.
  • FIG. 5 is a schematic block diagram of a protocol stack architecture in a communication system according to an embodiment of the present application. It should be understood that FIG. 5 only shows the protocol layer related to the embodiment of the present application in the first terminal device, the second terminal device, the first network device, and the second network device, the first terminal device, the second terminal device, and the first The network device and the second network device may also include other protocol layers, which are not specifically limited in this embodiment of the present application.
  • the protocol stack architecture shown in Figure 5 is basically the same as the protocol stack architecture shown in Figure 3.
  • the following highlights the difference from the protocol stack shown in Figure 3. That is, the process of transmitting the second data packet through the non-direct connection port between the first terminal device and the first network device.
  • the first terminal device accesses the first network device, and the second terminal device accesses the second network device. Therefore, in the process of transmitting the data packet to the second terminal device by using the second interface, the first terminal device needs to pass through two networks.
  • the device performs forwarding, that is, a routing layer is separately configured on the first network device and the second network device, and is configured to forward the second data packet to the second terminal device.
  • the routing layer of the first terminal device in the process of encapsulating the first routing header for the second PDU, in addition to encapsulating the second terminal device that receives the second data packet, the destination information mentioned above is required to be encapsulated.
  • the identifier information of the second network device is encapsulated in a routing header, and specifically, the identifier information of the first network device may also be encapsulated.
  • the routing device in the process of adding the first routing header to the second PDU, the routable information needs to be added to the first routing header, and the routable information is used to indicate that the first terminal device can be And routing the second data packet to the second terminal device.
  • the routing device may include the first network device and the second network device.
  • the identifier information of the first network device to which the first terminal device belongs and the identifier information of the second network device to which the second terminal device belongs may be obtained through negotiation between the first terminal device and the second terminal device. .
  • the third type of protocol stack architecture implements transmission of data packets in the same data stream through the first interface and the second interface through network device configuration.
  • the third type of protocol stack can be understood as an improvement to the first type of protocol stack and the second type of protocol stack, replacing the adaptation layer by means of network device configuration, and adding the first aggregation identifier or the second convergence identifier in the routing layer.
  • FIG. 6 is a schematic block diagram showing the architecture of a protocol stack in a communication system according to another embodiment of the present application. It should be understood that FIG. 6 only shows the protocol stack architecture in the first terminal device and the second terminal device, because The protocol stack architecture of the network device in the three types of protocol stack architecture is the same as the protocol stack architecture in the network device in the second type of protocol stack and the first type of protocol stack architecture. For brevity, no further details are provided herein.
  • the first terminal device transmits the first PDU acquired from the PDCP layer to the RLC entity corresponding to the first interface, and finally transmits the second RRC entity to the second terminal device through the first interface;
  • the obtained second PDU is transmitted to the routing layer corresponding to the second interface, and the process of adding the first routing header is performed, and then the second PDU carrying the first routing header is transmitted to the RLC entity corresponding to the second interface, and finally passes through the second interface. Transfer to the second terminal device.
  • the method further includes: the first terminal device receiving the first configuration information sent by the network device, where the first configuration information is used to configure the first terminal device to pass the first
  • the interface transmits the first data packet, and transmits the second data packet through the second interface.
  • the network device that sends the first configuration information is the network device to which the first terminal device and the second terminal device belong; the first terminal device The network device that sends the first configuration information is the first network device that is accessed by the first terminal device, when the network device is different from the network device.
  • the first network device and the second network device negotiate to determine that the first terminal device can be used to be the second terminal device.
  • the terminal device transmits the first interface and the second interface of the data packet.
  • the first network device may be configured by the first network device to the first terminal device by using the first configuration information, and configured by the second network device to the second terminal device by using the third configuration information, the third configuration information and the third A configuration information has the same function and can carry the same indication information.
  • the content of the specific indication information is described in detail below.
  • the first configuration information carries at least one of the following indication information: indicating that the radio bearer corresponding to the first interface is the same as the radio bearer corresponding to the second interface; Instructing to transmit, by using the first interface, a destination address of the first data packet and a destination information that is the same as a destination address of the second data packet by using the second interface;
  • the channel and the logical information corresponding to the second interface are the same indication information.
  • the first interface and the second interface are configured to transmit data packets to the second terminal device by using the network device, instead of adding an adaptation layer in the architecture of the protocol stack, which is beneficial to reducing the pair. Improvements to existing protocol stacks reduce the cost of improving the protocol stack.
  • the fourth type of protocol stack architecture is applicable to the communication scenario 1 above, and the first interface is a direct connection port for communicating between the first terminal device and the second terminal device, and the second interface is between the first terminal device and the network device.
  • the non-direct connection port of the communication wherein the protocol stack architecture in the first terminal device, the second terminal device, and the network device is as shown in FIG. 7.
  • the design method provided by the embodiment of the present application is to hope that the first terminal device transmits the data packets through the first interface and the second interface, and the second terminal device passes the Operations such as aggregation of data packets transmitted by the first interface and the second interface are performed on the PDCP layer.
  • FIG. 7 is a schematic block diagram of a protocol stack architecture in a communication system according to another embodiment of the present application.
  • the first terminal device, the second terminal device, and the network device may further include other protocol layers, This embodiment of the present application does not specifically limit this.
  • a convergence layer (Convergence Layer) is added to the first terminal device and the second terminal device, and the protocol stack structure corresponding to the direct connection port of the first terminal device and the second terminal device is used.
  • An adaptation layer is added.
  • a routing layer is added to the protocol stack structure corresponding to the indirect interface of the first terminal device and the second terminal device, and is also referred to as a “second routing layer”.
  • the network device adds a routing layer to the protocol stack architecture corresponding to the non-direct interface.
  • the adaptation layer and the routing layer in the foregoing first terminal device and the second terminal device may be located between the convergence layer and the PDCP layer, and the aggregation layer, the adaptation layer, and the routing layer may be located in the service data adaptation protocol.
  • SDAP Data Adaptation Protocol
  • the aggregation layer is located between the SDAP layer and the routing layer.
  • the routing layer set in the network device and the routing layer in the first terminal device may provide a peering entity of the routing layer, that is, the routing layer in the network device may be located on the PDCP layer of the network device, and may be located in the network. Between the PDCP layer of the device and the SDAP layer of the network device.
  • PDU protocol data unit
  • Case 1 The first data packet and the second data packet are the same data packet.
  • the third PDU is copied to generate a fourth PDU, and the third PDU and the fourth PDU may be configured to have the same aggregation layer sequence number (SN).
  • SN aggregation layer sequence number
  • the protocol layer entity is used to indicate that the first data packet is aggregated.
  • the fourth PDU is a PDU of the second data packet in the PDCP layer of the first terminal device
  • the first routing header is used to indicate a path for transmitting the second data packet
  • the fourth convergence identifier is used to indicate that data aggregation, or fourth convergence, is performed on the second data packet by the target protocol layer entity.
  • the protocol layer entity is used to indicate that the second data packet is aggregated.
  • the foregoing adding a second routing header to the fourth PDU may be understood as encapsulating the fourth PDU by using a routing-header protocol.
  • the second routing header may include source information (Src Info) and destination information (Dest Info).
  • the second routing header may further include quality of service information (QoS Info).
  • QoS Info quality of service information
  • At least one of Time information (Time Info) and Measurement information (Measurement Info) At least one of Time information (Time Info) and Measurement information (Measurement Info), and the specific PDU encapsulation structure can be seen in FIG. 8.
  • the foregoing source information is used to indicate the first terminal device, and specifically may be address information of the first terminal device, such as an Internet Protocol (IP) address, a Media Access Control (MAC) address, and a first Identification information of a terminal device, and the like.
  • the identifier information of the first terminal device may be an International Mobile Subscriber Identification Number (IMSI), or a temporary identifier that may be allocated to the terminal to protect the privacy network, or source terminal location information.
  • IMSI International Mobile Subscriber Identification Number
  • the destination information is used to indicate the second terminal device, and specifically may be the address information of the second terminal device, the second terminal device identifier information, the address information of the terminal device set where the second terminal device is located, or the terminal device where the second terminal device is located. Collection identification information. For example, the IP multicast address corresponding to the terminal device set, the MAC multicast address corresponding to the terminal device set, or the group ID of the terminal device set allocated by the network.
  • the QoS information is used to determine the level of service for transmitting the fourth PDU, which can be represented by priority.
  • the time information is used to indicate time information related to the second data packet, for example, the generation time of the second data packet, the expected transmission time of the second data packet, the latest transmission time of the second data packet, and the like.
  • the process of acquiring the destination information by the first terminal device may be indicated by the network device to the first terminal device, or may be obtained by the first terminal device and the second terminal device.
  • the manner in which a terminal device obtains the above-mentioned destination information is not specifically limited.
  • the third PDU carrying the third convergence identifier and the fourth PDU carrying the second routing header and the fourth convergence identifier are respectively transmitted to different RLC entities in the RLC layer of the first terminal device.
  • the network device After receiving the second data packet by using the second interface, the network device determines, by using the destination information carried in the fourth PDU, the second terminal device that receives the second data packet, and the second data packet. Forward to the second terminal device.
  • the second terminal device After receiving the first data packet by using the first interface, the second terminal device decapsulates the third PDU carrying the third aggregation identifier, and transmits the third PDU according to the third convergence identifier to the adaptation layer of the second terminal device.
  • the target protocol layer entity that aggregates the third PDU that is, the first convergence entity.
  • the fourth PDU carrying the fourth convergence identifier is decapsulated at the routing layer of the second terminal device, and the fourth PDU is transmitted to the pair according to the fourth convergence identifier.
  • the first aggregation entity of the second terminal device aggregates the third PDU and the fourth PDU.
  • the target convergence layer entity is based on the third PDU and
  • the aggregation layer sequence number carried in the fourth PDU is repeatedly detected and repeated, and any one of the third PDU and the fourth PDU may be discarded.
  • the aggregation layer used for the aggregation of the data packets is separated from the PDCP layer, which is beneficial to reducing the PDCP layer to the data packet.
  • the convergence layer of the first terminal device two different data packets, the first data packet and the second data packet in the same data stream are respectively transmitted to the adaptation layer and the first terminal device of the first terminal device.
  • the routing layer wherein the sequence number of the first data packet is different from the sequence number of the second data packet.
  • the process of transmitting a data packet is only slightly different in whether the aggregation layer needs to copy the first data packet to be transmitted.
  • the aggregation layer does not need to execute the data again.
  • the process of copying the packet can directly transmit the first data packet and the second data packet to be transmitted.
  • the transmission process is the same, and for the sake of brevity, it will not be described here.
  • the fourth type of protocol stack is applicable to the communication scenario 2 in the above, and the first interface is a direct connection port for communication between the first terminal device and the second terminal device, and the second interface is communication between the first terminal device and the network device.
  • the protocol stack architecture in the first terminal device, the second terminal device, and the network device is as shown in FIG. 5.
  • FIG. 9 is a schematic block diagram of a protocol stack architecture in a communication system according to an embodiment of the present application. It should be understood that FIG. 9 only shows the protocol layer related to the embodiment of the present application, the first terminal device, the second terminal device, and the first device in the first terminal device, the second terminal device, the first network device, and the second network device.
  • the network device and the second network device may also include other protocol layers, which are not specifically limited in this embodiment of the present application.
  • the protocol stack architecture shown in Figure 9 is basically the same as the protocol stack architecture shown in Figure 7.
  • the following highlights the difference from the protocol stack shown in Figure 7. That is, the process of transmitting the second data packet through the non-direct connection port between the first terminal device and the first network device.
  • the first terminal device accesses the first network device, and the second terminal device accesses the second network device. Therefore, in the process of transmitting the data packet to the second terminal device by using the second interface, the first terminal device needs to pass through two networks.
  • the device performs forwarding, that is, a routing layer is separately configured on the first network device and the second network device, and is configured to forward the second data packet to the second terminal device.
  • the routing layer of the first terminal device in the process of encapsulating the second routing header for the fourth PDU, in addition to encapsulating the second terminal device that receives the second data packet, the destination information mentioned above is required to be encapsulated.
  • the identifier information of the second network device is encapsulated in the routing header, and the identifier information of the first network device may be specifically encapsulated.
  • the routing device in the process of adding the second routing header to the fourth PDU, the routable information needs to be added to the second routing header, and the routable information is used to indicate that the first terminal device can be And routing the second data packet to the second terminal device.
  • the routing device may include the first network device and the second network device.
  • the identifier information of the first network device to which the first terminal device belongs and the identifier information of the second network device to which the second terminal device belongs may be obtained through negotiation between the first terminal device and the second terminal device. .
  • the sixth type of protocol stack transmits data packets in the same data stream through the first interface and the second interface through network device configuration.
  • the sixth type of protocol stack can be understood as an improvement to the fourth type of protocol stack architecture and the fifth type of protocol stack architecture, replacing the adaptation layer by means of network device configuration, and adding a third convergence identifier or a fourth convergence in the routing layer.
  • the function of the logo. 10 is a schematic block diagram showing the architecture of a protocol stack in a communication system according to an embodiment of the present application. It should be understood that FIG. 10 only shows the protocol stack architecture in the first terminal device and the second terminal device, due to the sixth class.
  • the protocol stack architecture of the network device in the protocol stack architecture is the same as the protocol stack architecture in the network device in the fourth type of protocol stack architecture and the fifth type protocol stack architecture. For brevity, no further details are provided herein.
  • the first terminal device transmits the third PDU acquired from the aggregation layer to the RLC entity corresponding to the first interface, and finally transmits the second RRC entity to the second terminal device through the first interface;
  • the obtained fourth PDU is transmitted to the routing layer corresponding to the second interface, and the process of adding the second routing header is performed, and then the fourth PDU carrying the second routing header is transmitted to the RLC entity corresponding to the second interface, and finally passes through the second interface. Transfer to the second terminal device.
  • the method further includes: the first terminal device receiving the second configuration information sent by the network device, where the second configuration information is used to configure the first terminal device to pass the first
  • the interface transmits the first data packet, and transmits the second data packet through the second interface.
  • the network device that sends the second configuration information is the network device to which the first terminal device and the second terminal device belong; the first terminal device The network device that sends the second configuration information is the first network device that is accessed by the first terminal device, when the network device is different from the network device.
  • the first network device and the second network device negotiate to determine that the first terminal device can be used to be the second terminal device.
  • the terminal device transmits the first interface and the second interface of the data packet.
  • the first network device may be configured by the first network device to the first terminal device by using the first configuration information, and configured by the second network device to the second terminal device by using the fourth configuration information, the fourth configuration information and the first A configuration information has the same function and can carry the same indication information.
  • the content of the specific indication information is described in detail below.
  • the second configuration information carries at least one of the following indication information: indicating that the radio bearer corresponding to the first interface is the same as the radio bearer corresponding to the second interface; Instructing to transmit, by using the first interface, a destination address of the first data packet and a destination information that is the same as a destination address of the second data packet by using the second interface; The channel and the logical information corresponding to the second interface are the same indication information.
  • the first interface and the second interface are configured to transmit data packets to the second terminal device by using the network device, instead of adding an adaptation layer in the architecture of the protocol stack, which is beneficial to reducing the pair. Improvements to existing protocol stacks reduce the cost of improving the protocol stack.
  • the first interface is a direct interface
  • the second interface is a non-direct interface.
  • the first interface and the second interface may be a direct connection port.
  • the first interface is a direct connection port in the LTE system
  • the second interface is a direct connection port in the NR system.
  • the protocol stack architecture corresponding to the two interfaces is the same, and the transmission process corresponding to the data packet is the same.
  • the modified protocol stack architecture based on the above-mentioned first type protocol stack architecture and the above third type protocol stack architecture is mentioned.
  • FIG. 11 is a schematic block diagram of a protocol stack architecture based on a dual direct interface in the protocol stack architecture shown in FIG. 11 , where the protocol stack corresponding to the first interface and the protocol stack corresponding to the second interface are The protocol stack corresponding to the first interface in the first type of protocol stack architecture has the same architecture.
  • For a specific data packet transmission process refer to the process of transmitting a data packet through the first interface in the first type of protocol stack architecture, and details are not described herein for brevity.
  • FIG. 12 is a schematic block diagram of a protocol stack architecture based on a dual direct interface according to another embodiment of the present application.
  • a protocol stack corresponding to the first interface and a protocol corresponding to the second interface The stack has the same architecture as the protocol stack corresponding to the first interface in the third type of protocol stack architecture.
  • For a specific data packet transmission process refer to the process of transmitting a data packet through the first interface in the first type of protocol stack architecture, and details are not described herein for brevity.
  • the network device configuration is adopted.
  • the first interface and the second interface transmit the data packets in the same data stream to replace the functions implemented by the adaptation layer, thereby avoiding the protocol stack of the first terminal device and the protocol stack of the second terminal device brought by the new adaptation layer. improvement of.
  • the method further includes: 230, a configuration process, that is, the network device configures, by the network device, the first data packet and the second data by using multiple interfaces. package.
  • the first terminal device receives the multi-interface transmission indication information sent by the network device, where the multi-interface transmission indication information is used to indicate that the first terminal device transmits to the second terminal device through two interfaces.
  • the first data packet and the second data packet, and/or the multi-interface transmission indication information are further used to indicate whether the data carried in the first data packet and the second data packet are the same.
  • the function that the second terminal device receives the first data packet and the second data packet transmitted by the first terminal device by using multiple interfaces may also be determined by the second terminal device based on the communication protocol, or may be the network device.
  • the configuration of the second terminal device refer to the configuration procedure of the network device configured for the first terminal device.
  • the configuration process shown in the foregoing step 230 may be performed by the network device sending the first configuration information to the first terminal device by using the signaling interaction.
  • the network device may directly send the first configuration to the first terminal device.
  • the information is configured to implement the foregoing configuration process, and configure the first terminal device to transmit the first data packet and the second data packet to the second terminal device by using the first interface and the second interface.
  • the configuration process shown in the foregoing step 230 may also be implemented by the foregoing network device sending the first configuration information to the first terminal device, which is implemented by using two signaling interactions, which is not specifically limited in this embodiment of the present application.
  • the specific transmission mode in which the first terminal device transmits a data packet to the second terminal device may be configured by the network device for the first terminal device, or may be specified by using a communication protocol, which is not used by the embodiment of the present application. Make specific limits.
  • the foregoing first terminal device transmits, by using two interfaces, the transmission manner of the first data packet and the second data packet to the second terminal device, which may be specified by a communication protocol, and the foregoing indication Whether the first data packet to be transmitted and the data carried in the second data packet are the same may be configured by the network device for the first terminal device.
  • the first terminal device transmits, by using the two interfaces, the transmission manner of the first data packet and the second data packet to the second terminal device, where the network device is configured for the first terminal device, and the foregoing indication is to be Whether the transmitted first data packet and the data carried in the second data packet are the same may be specified by a communication protocol.
  • the method further includes: the first terminal device sending the multi-interface transmission to the network device The request, the multi-interface transmission request is used to request, by the network device, to transmit the first data packet and the second data packet to the second terminal device through multiple interfaces.
  • the first data packet and the second data packet may be transmitted by the network device for the first terminal by using the multiple interfaces in a manner that the first terminal device requests the network device.
  • the foregoing multi-interface transmission request carries a measurement report of the first channel and/or a Qos parameter of the first channel, where the first channel is used to directly transmit a data packet between the first terminal device and the second terminal device,
  • the first channel may be a channel corresponding to the above-mentioned direct connection port, for example, a side link (SL) corresponding to the direct connection port.
  • SL side link
  • the first terminal device receives the multi-interface transmission indication information sent by the network device, where the first terminal device receives a system information block (SIB) sent by the network device, where the SIB Carrying the multi-interface transmission indication information; or the first terminal device receiving the dedicated signaling sent by the network device, where the dedicated signaling carries the multi-interface transmission indication information.
  • SIB system information block
  • the method before step 210, further includes: 240, an activation process, configured to activate, by the first interface, the first data packet to be transmitted through the first interface, and the second interface
  • an activation process configured to activate, by the first interface, the first data packet to be transmitted through the first interface, and the second interface
  • the transmission method of transmitting the second data packet can be in two ways.
  • the first type of activation activation by the network device for the first terminal device.
  • the first terminal device receives the first activation indication information that is sent by the network device, where the first activation indication information is used to indicate the A terminal device activates transmission of data packets to the second terminal device through the multiple interfaces.
  • the second terminal device receives the second activation indication information that is sent by the network device, where the second activation indication information is used to instruct the first terminal device to activate to transmit a data packet to the second terminal device through multiple interfaces.
  • the first terminal device accesses the first network device, and the second terminal device accesses the second network device, the first terminal device receives the first activation indication information sent by the first network device, where the first activation indication information is used to indicate The first terminal device activates transmitting a data packet to the second terminal device through multiple interfaces.
  • the second terminal device receives the second activation indication information that is sent by the second network device, where the second activation indication information is used to indicate that the first terminal device activates to transmit the data packet to the second terminal device through multiple interfaces.
  • whether the function of transmitting the data packet between the first terminal device and the second terminal device to the second terminal device through multiple interfaces is activated may be determined through negotiation. .
  • the first terminal device activates the data packet transmission to the second terminal device through the multiple interfaces, and may be a data packet in the same data stream, that is, includes the first data packet and the second data packet.
  • the second activation mode the activation is negotiated by the first terminal device and the second terminal device.
  • the first terminal device sends an activation request to the second terminal device, where the activation request is used to request the second terminal device to transmit the data packet with the first terminal device through the multiple interface; the first terminal device receives the second And a response message sent by the terminal device, where the response message is used to indicate whether the second terminal device agrees to transmit the data packet with the first terminal device by using multiple interfaces.
  • the foregoing second activation mode may be used in the scenario where the first terminal device and the second terminal device belong to the same network device, and may also be applicable to the case where the first terminal device and the second terminal device belong to different network devices.
  • the third activation mode is: forwarding, by the first terminal device, the first activation indication information sent by the first network device to the second terminal device.
  • the first terminal device receives the first activation indication information that is sent by the first network device, where the first activation indication information is used to indicate that the first terminal device activates to transmit a data packet to the second terminal device through multiple interfaces;
  • the first terminal device forwards the first activation indication information to the second terminal device.
  • the foregoing third activation mode may be used in the scenario where the first terminal device and the second terminal device belong to the same network device, and may also be applicable to the case where the first terminal device and the second terminal device belong to different network devices.
  • Embodiments of the present application are described below from the perspective of transmitting signaling from a network device to a terminal device. It should be understood that the functions of the signaling in the method introduced in the embodiment of the present application and the content carried in the signaling may be referred to the above description, and are not specifically described herein for the sake of brevity.
  • Another embodiment of the present application further provides a communication method, where the method includes: the network device sends the multi-interface transmission indication information to the first terminal device, where the multi-interface transmission indication information is used to indicate that the first terminal device passes the multiple interfaces. Transmitting the first data packet and the second data packet to the second terminal device, and/or the multi-interface transmission indication information is further used to indicate that the first data packet and the second data packet are carried Is the data the same?
  • the first data packet and the second data packet are the same data packet in the same data stream.
  • the first data packet and the second data packet are different data packets in the same data stream.
  • the method before the sending, by the network device, the multi-interface transmission indication information to the first terminal device, the method further includes: the network device receiving the multi-interface transmission request sent by the first terminal device The multi-interface transmission request is used to request the network device to transmit the first data packet and the second data packet to the second terminal device through multiple interfaces.
  • the network device receives the multi-interface transmission request sent by the first terminal device, where the network device receives the system information block SIB sent by the first terminal device, where the SIB Carrying the multi-interface transmission indication information; or the network device receiving the dedicated signaling sent by the first terminal device, where the dedicated signaling carries the multi-interface transmission indication information.
  • the multiple interface includes a first interface and a second interface
  • the method further includes: first configuration information that is sent by the network device to the first terminal device, the first The configuration information is used to configure the first terminal device to transmit the first data packet by using the first interface, and transmit the second data packet by using the second interface.
  • the first configuration information carries at least one of the following: the information indicating that the radio bearer corresponding to the first interface is the same as the radio bearer corresponding to the second interface. And indication information indicating that the destination address of the first data packet is transmitted through the first interface is the same as the destination address of the second data packet transmitted by using the second interface; The logical channel corresponding to the first interface and the logical channel corresponding to the second interface are the same indication information.
  • the communication method of the embodiment of the present application is described in detail above with reference to FIG. 1 to FIG. 13.
  • the apparatus of the embodiment of the present application is described in detail below with reference to FIG. 14 to FIG. It should be understood that the apparatus shown in FIG. 14 to FIG. 16 can implement the various steps in FIG. 2, and therefore, the specific details can be referred to the description in the foregoing embodiment. To avoid repetition, details are not described herein again.
  • FIG. 13 is a schematic block diagram of a first terminal device according to an embodiment of the present application.
  • the first terminal device 1300 shown in FIG. 13 includes a sending module 1310 and a first receiving module 1320.
  • a sending module configured to transmit, by using the first interface, a first data packet to the second terminal device, where the first interface is a communication interface that is directly communicated by the first terminal device and the second terminal device in the Long Term Evolution (LTE) system, Or a communication interface in which the first terminal device and the second terminal device communicate directly in the new wireless NR system;
  • LTE Long Term Evolution
  • the sending module is further configured to transmit, by using the second interface, the second data packet to the second terminal device, where the second interface is any one of the following interfaces: the first terminal device communicates with the LTE network device a communication interface, a communication interface in which the first terminal device communicates with the NR network device, a communication interface in which the first terminal device and the second terminal device communicate directly in the LTE system, and the first terminal device in the NR system a communication interface directly communicating with the second terminal device, a communication interface in which the first terminal device and the relay terminal device directly communicate in the LTE system, and the first terminal device and the relay terminal device in the NR system Communication interface for direct communication.
  • the first data packet and the second data packet are the same data packet in the same data stream.
  • the first data packet and the second data packet are different data packets in the same data stream.
  • the first data packet and the second data packet are aggregated by the same target protocol layer entity in the second terminal device.
  • the first terminal device is configured with a first routing layer, where the first routing layer is located in a packet data convergence protocol PDCP layer of the first terminal device and the first terminal device Between the RLC layer of the radio link layer control protocol, the first terminal device further includes: a routing entity of the first routing layer, configured to add a first routing header, the second PDU, to the second protocol data unit PDU. And the first routing header is used to indicate a path for transmitting the second data packet, where the second data packet is in a PDU of a PDCP layer of the first terminal device.
  • the first terminal device is configured with a first adaptation layer, where the first adaptation layer is located at a PDCP layer of the first terminal device and an RLC layer of the first terminal device
  • the first terminal device further includes: an adaptation entity of the first adaptation layer, configured to add a first convergence identifier to the first PDU, where the first PDU is the first data packet A PDU of a PDCP layer of the first terminal device, where the first convergence identifier is used to indicate that data aggregation is performed on the first data packet by the target protocol layer entity.
  • the first terminal device before the transmitting the first data packet to the second terminal device by using the first interface, the first terminal device further includes: a first receiving module, configured to receive, sent by the network device The first configuration information is used to configure the first terminal device to transmit the first data packet by using the first interface, and transmit the second data packet by using the second interface.
  • a first receiving module configured to receive, sent by the network device
  • the first configuration information is used to configure the first terminal device to transmit the first data packet by using the first interface, and transmit the second data packet by using the second interface.
  • the first configuration information carries at least one of the following: the information indicating that the radio bearer corresponding to the first interface is the same as the radio bearer corresponding to the second interface.
  • the indication information is used to indicate that the destination address of the first data packet is transmitted through the first interface is the same as the destination address that is used to transmit the second data packet by using the second interface;
  • the logical channel corresponding to the interface and the logical channel corresponding to the second interface are the same indication information.
  • the first terminal is configured with a first aggregation layer and a second routing layer
  • the first terminal device further includes: a routing entity of the second routing layer
  • the first aggregation layer acquires a third PDU, where the third PDU is the PDU of the second data packet in the first convergence layer; the routing entity of the second routing layer is further used to be the third PDU.
  • the third PDU is a PDU of the second data packet in the first aggregation layer, and the second routing header is used to indicate a path for transmitting the second data packet;
  • the routing entity of the second routing layer is further configured to transmit the third PDU carrying the second routing header to the PDCP layer of the first terminal.
  • the first terminal is configured with a second adaptation layer
  • the first terminal device further includes: an adaptation entity of the second adaptation layer, configured to use the first
  • the aggregation layer acquires a fourth PDU, where the fourth PDU is the PDU of the first data packet in the first convergence layer, and the adaptation entity of the second adaptation layer is further used to be the fourth PDU.
  • the adaptation entity of the second adaptation layer is further configured to carry the second convergence identifier
  • the fourth PDU is transmitted to the PDCP layer of the first terminal.
  • the first terminal device further includes: a second receiving module, configured to receive second configuration information that is sent by the network device, where the second configuration information is used to configure the first terminal device Transmitting the first data packet by using the first interface, and transmitting the second data packet by using the second interface.
  • a second receiving module configured to receive second configuration information that is sent by the network device, where the second configuration information is used to configure the first terminal device Transmitting the first data packet by using the first interface, and transmitting the second data packet by using the second interface.
  • the second configuration information carries at least one of the following: the information indicating that the radio bearer corresponding to the first interface is the same as the radio bearer corresponding to the second interface
  • the indication information is used to indicate that the destination address of the first data packet is transmitted through the first interface is the same as the destination address that is used to transmit the second data packet by using the second interface;
  • the logical channel corresponding to the interface and the logical channel corresponding to the second interface are the same indication information.
  • the first terminal device further includes: a third receiving module, configured to receive, by the network device, multi-interface transmission indication information, where the multi-interface transmission indication information is used to indicate the Transmitting, by the terminal device, the first data packet and the second data packet to the second terminal device by using two interfaces, and/or the multi-interface transmission indication information is further used to indicate the first data packet and the Whether the data carried in the second data packet is the same.
  • a third receiving module configured to receive, by the network device, multi-interface transmission indication information, where the multi-interface transmission indication information is used to indicate the Transmitting, by the terminal device, the first data packet and the second data packet to the second terminal device by using two interfaces, and/or the multi-interface transmission indication information is further used to indicate the first data packet and the Whether the data carried in the second data packet is the same.
  • the sending module is further configured to send, to the network device, a multi-interface transmission request, where the multi-interface transmission request is used to request, from the network device, to the second terminal device by using multiple interfaces. Transmitting the first data packet and the second data packet.
  • the third receiving module is specifically configured to: receive a system information block SIB sent by the network device, where the SIB carries the multi-interface transmission indication information; or receive the network device to send Dedicated signaling, the dedicated signaling carrying the multi-interface transmission indication information.
  • the sending module 1310 and the first receiving module 1320 may be the transceiver 1440, where the protocol layer entity may be the processor 1420, where the protocol layer entity may be a routing entity, an adaptation entity, and a first aggregation. Entity, etc.
  • the protocol layer in the first terminal device may be a program module stored in the memory 1410 of the first terminal device, where the protocol layer includes a first routing layer, a second routing layer, a first adaptation layer, and a second suitable The layer and the first convergence layer and the like.
  • the first terminal device may further include an input/output interface 1430, as shown in FIG.
  • FIG. 14 is a schematic block diagram of a first terminal device according to another embodiment of the present application.
  • the first terminal device 1400 shown in FIG. 14 may include a memory 1410, a processor 1420, an input/output interface 1430, and a transceiver 1440.
  • the memory 1410, the processor 1420, the input/output interface 1430 and the transceiver 1440 are connected by an internal connection path for storing instructions for executing the instructions stored by the memory 1420 to control the input/
  • the output interface 1430 receives the input data and information, outputs data such as the operation result, and controls the transceiver 1440 to transmit a signal.
  • the transceiver 1440 is configured to transmit, by using a first interface, a first data packet to a second terminal device, where the first interface is directly communicated by the first terminal device and the second terminal device in a long term evolution LTE system. a communication interface, or a communication interface in which the first terminal device and the second terminal device communicate directly in the new wireless NR system;
  • the second interface is any one of the following interfaces: a communication interface that the first terminal device communicates with the LTE network device, the first a communication interface in which the terminal device communicates with the NR network device, a communication interface in which the first terminal device and the second terminal device communicate directly in the LTE system, and the first terminal device and the second terminal device in the NR system directly A communication interface for communication, a communication interface in which the first terminal device and the relay terminal device directly communicate in the LTE system, and a communication interface in which the first terminal device and the relay terminal device communicate directly in the NR system.
  • the processor 1420 may be a general-purpose central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), or one or more.
  • CPU central processing unit
  • ASIC application specific integrated circuit
  • transceiver 1440 also known as a communication interface, utilizes transceivers such as, but not limited to, transceivers to enable communication between terminal 1400 and other devices or communication networks.
  • the memory 1410 can include read only memory and random access memory and provides instructions and data to the processor 1420.
  • a portion of processor 1420 may also include a non-volatile random access memory.
  • the processor 1420 can also store information of the device type.
  • each step of the above method may be completed by an integrated logic circuit of hardware in the processor 1420 or an instruction in a form of software.
  • the communication method disclosed in the embodiment of the present application may be directly implemented as a hardware processor execution completion, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in memory 1410, and processor 1420 reads the information in memory 1414 and, in conjunction with its hardware, performs the steps of the above method. To avoid repetition, it will not be described in detail here.
  • the processor may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSPs), and dedicated integration.
  • DSPs digital signal processors
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • FIG. 15 is a schematic block diagram of a second terminal device according to an embodiment of the present application.
  • the second terminal device 1500 shown in FIG. 15 includes a first receiving module 1510 and a second receiving module 1520.
  • a first receiving module configured to receive, by using the first interface, a first data packet sent by the first terminal device, where the first interface is directly communicated by the first terminal device and the second terminal device in a long term evolution LTE system a communication interface, or a communication interface in which the first terminal device and the second terminal device communicate directly in the new wireless NR system;
  • the first receiving module is further configured to receive, by using the second interface, the second data packet sent by the first terminal device, where the second interface is any one of the following interfaces: the first terminal device and the LTE a communication interface for communicating with the network device, a communication interface for communicating between the first terminal device and the NR network device, a communication interface for directly communicating between the first terminal device and the second terminal device in the LTE system, and the first terminal in the NR system a communication interface directly communicating between the device and the second terminal device, a communication interface in which the first terminal device and the relay terminal device directly communicate in the LTE system, and the first terminal device and the relay terminal in the NR system The communication interface through which the device communicates directly.
  • the first data packet and the second data packet are the same data packet in the same data stream.
  • the first data packet and the second data packet are different data packets in the same data stream.
  • the first data packet and the second data packet are aggregated by the same target protocol layer entity in the second terminal device.
  • the target protocol layer entity is a packet data convergence protocol PDCP entity
  • the second terminal device is configured with a first routing layer
  • the first routing layer is located at the second terminal device.
  • the second terminal device further includes: a routing layer entity of the first routing layer, configured to carry the first routing header
  • the second protocol data unit PDU is decapsulated, and the second PDU is transmitted to the PDCP entity, where the second PDU is a PDU of the second data packet in the PDCP layer of the first terminal device.
  • the first routing header is used to indicate a path for transmitting the second data packet.
  • the second terminal device is configured with a first adaptation layer, where the first adaptation layer is located at a PDCP layer of the second terminal device and an RLC layer of the second terminal device
  • the second terminal device further includes: an adaptation entity of the first adaptation layer, configured to transmit the first PDU to the PDCP entity according to the first convergence identifier carried by the first PDU,
  • the first PDU is a PDU of the first data packet in the PDCP layer of the first terminal device, and the first convergence identifier is used to indicate that the first data packet is aggregated in the target protocol layer entity.
  • the second terminal device before the second terminal device receives the first data packet sent by the first terminal device by using the first interface, the second terminal device further includes: a second receiving module, configured to receive First configuration information sent by the network device, where the first configuration information is used to configure the first terminal device to transmit the first data packet by using the first interface, and to transmit the second data by using the second interface data pack.
  • a second receiving module configured to receive First configuration information sent by the network device, where the first configuration information is used to configure the first terminal device to transmit the first data packet by using the first interface, and to transmit the second data by using the second interface data pack.
  • the first configuration information carries at least one of the following: the information indicating that the radio bearer corresponding to the first interface is the same as the radio bearer corresponding to the second interface.
  • the indication information is used to indicate that the destination address of the first data packet is transmitted through the first interface is the same as the destination address that is used to transmit the second data packet by using the second interface;
  • the logical channel corresponding to the interface and the logical channel corresponding to the second interface are the same indication information.
  • the second terminal device is configured with a first convergence layer and a second routing layer, where the target protocol layer entity is a first convergence entity of the first convergence layer, and the second a routing entity of the routing layer, configured to acquire a third PDU from a PDCP layer of the second terminal device, where the third PDU is a PDU of the second data packet at a PDCP layer of the first terminal device;
  • the routing entity of the second routing layer is further configured to decapsulate the third PDU carrying the second routing header, and transmit the third PDU to the first aggregation entity, where the second routing header is used to indicate Transmitting a path of the second data packet; the first aggregation entity, configured to aggregate the second data packet.
  • the second terminal device is configured with a second adaptation layer, where the second terminal device includes: an adaptation entity of the second adaptation layer, for the second The PDCP layer of the terminal device acquires a fourth PDU, where the fourth PDU is a PDU of the first data packet at a PDCP layer of the first terminal device, and an adaptation entity of the second adaptation layer is configured to a third aggregation identifier carried by the fourth PDU, the fourth PDU is transmitted to the first aggregation entity, and a third convergence identifier is used to indicate a data flow to which the first data packet belongs; the first convergence An entity, configured to perform data aggregation on the first data packet.
  • the second terminal device further includes: a third receiving module, configured to receive second configuration information that is sent by the network device, where the second configuration information is used to configure the first terminal device Transmitting the first data packet by using the first interface, and transmitting the second data packet by using the second interface.
  • a third receiving module configured to receive second configuration information that is sent by the network device, where the second configuration information is used to configure the first terminal device Transmitting the first data packet by using the first interface, and transmitting the second data packet by using the second interface.
  • the second configuration information carries at least one of the following: the information indicating that the radio bearer corresponding to the first interface is the same as the radio bearer corresponding to the second interface
  • the indication information is used to indicate that the destination address of the first data packet is transmitted through the first interface is the same as the destination address that is used to transmit the second data packet by using the second interface;
  • the logical channel corresponding to the interface and the logical channel corresponding to the second interface are the same indication information.
  • the first receiving module 1510 and the second receiving module 1520 may be the transceiver 1640, where the protocol layer entity may be the processor 1620, where the protocol layer entity may be a routing entity, an adaptation entity, and a A convergence entity, etc.
  • the protocol layer in the foregoing second terminal device may be a program module stored in the memory 1610 of the second terminal device, where the protocol layer includes a first routing layer, a second routing layer, a first adaptation layer, and a second suitable The layer and the first convergence layer and the like.
  • the second terminal device may further include an input/output interface 1630, as shown in FIG.
  • FIG. 16 is a schematic block diagram of a second terminal device according to another embodiment of the present application.
  • the second terminal device 1600 shown in FIG. 16 may include a memory 1610, a processor 1620, an input/output interface 1630, and a transceiver 1640.
  • the memory 1610, the processor 1620, the input/output interface 1630, and the transceiver 1640 are connected by an internal connection path.
  • the memory 1610 is configured to store instructions for executing the instructions stored by the memory 1620 to control input/
  • the output interface 1630 receives the input data and information, outputs data such as the operation result, and controls the transceiver 1640 to transmit a signal.
  • the transceiver 1640 is configured to receive, by using a first interface, a first data packet that is transmitted by the first terminal device, where the first interface is a direct communication between the first terminal device and the second terminal device in a long term evolution LTE system.
  • Communication interface or a communication interface in which the first terminal device and the second terminal device communicate directly in the new wireless NR system;
  • the second interface receives, by the second interface, the second data packet that is sent by the first terminal device, where the second interface is any one of the following interfaces: a communication interface that is communicated between the first terminal device and an LTE network device, where a communication interface in which a terminal device communicates with an NR network device, a communication interface in which the first terminal device and the second terminal device directly communicate in the LTE system, and the first terminal device and the second terminal device in the NR system directly communicate The communication interface, the communication interface in which the first terminal device and the relay terminal device directly communicate in the LTE system, and the communication interface in which the first terminal device and the relay terminal device communicate directly in the NR system.
  • the processor 1620 may be a general-purpose central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), or one or more.
  • CPU central processing unit
  • ASIC application specific integrated circuit
  • transceiver 1640 also known as a communication interface, utilizes transceivers such as, but not limited to, transceivers to enable communication between terminal 1600 and other devices or communication networks.
  • the memory 1610 can include read only memory and random access memory and provides instructions and data to the processor 1620.
  • a portion of processor 1620 may also include a non-volatile random access memory.
  • processor 1620 can also store information of the type of device.
  • each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 1620 or an instruction in a form of software.
  • the communication method disclosed in the embodiment of the present application may be directly implemented as a hardware processor execution completion, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 1610, and the processor 1620 reads the information in the memory 1616 and, in conjunction with its hardware, performs the steps of the above method. To avoid repetition, it will not be described in detail here.
  • the processor may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSPs), and dedicated integration.
  • DSPs digital signal processors
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • B corresponding to A means that B is associated with A, and B can be determined according to A.
  • determining B from A does not mean that B is only determined based on A, and that B can also be determined based on A and/or other information.
  • the size of the sequence numbers of the foregoing processes does not mean the order of execution sequence, and the order of execution of each process should be determined by its function and internal logic, and should not be applied to the embodiment of the present application.
  • the implementation process constitutes any limitation.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the computer program product includes one or more computer instructions.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transmission to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer readable storage medium can be any available media that can be read by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
  • the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a Digital Video Disc (DVD)), or a semiconductor medium (eg, a Solid State Disk (SSD)). )Wait.
  • a magnetic medium eg, a floppy disk, a hard disk, a magnetic tape
  • an optical medium eg, a Digital Video Disc (DVD)
  • DVD Digital Video Disc
  • SSD Solid State Disk

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Abstract

本申请提供了一种通信方法、第一终端设备和第二终端设备，该方法包括第一终端设备通过第一接口向第二终端设备传输第一数据包，第一接口为第一终端设备和第二终端设备直接通信的接口；第一终端设备通过第二接口向第二终端设备传输第二数据包，第二接口为下列接口中的任意一种：第一终端设备与LTE网络设备通信的接口，第一终端设备与NR网络设备通信的接口，第一终端设备和第二终端设备直接通信的接口，LTE制式中第一终端设备和中继终端设备直接通信的接口，以及NR制式中第一终端设备和中继终端设备直接通信的接口。有利于提高第一终端设备和第二终端设备之间传输数据包的性能。

Description

通信方法、第一终端设备和第二终端设备
本申请要求于2018年2月13日提交中国专利局、申请号为201810150307.8、申请名称为“通信方法、第一终端设备和第二终端设备”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
本申请涉及通信领域，并且更具体地，涉及通信方法、第一终端设备和第二终端设备。
背景技术
在通信系统中，为了进一步提高用户体验，在提高传输数据包的性能方面提出了更高的要求。例如，在支持V2X(Vehicle to Everything)通信的车联网中，对提高数据包的传输性能显得尤为重要。
车联网是使用无线通信等技术收集车辆、道路、环境等信息，通过车-车(Vehicle to vehicle，V2V)、车-路(Vehicle to route，V2R)信息交互和共享，使车和基础设施之间智能协同与配合，从而实现智能交通管理控制、车辆智能化控制和智能动态信息服务的一体化网络。通过车联网，车载终端可以向周边车载终端发送传感信息或者控制消息，实现车辆自动驾驶或者编排行驶。
在车联网等其他通信系统中，终端设备间可以直接通过直连接口进行数据包的传输，而无需网络设备的参与，然而，通过上述直连接口传输数据包的性能有限，也就是说，直连接口传输数据包的效率限制了第一终端设备向第二终端设备传输数据包的性能。
发明内容
本申请提供一种通信方法、终端设备及网络设备，有利于提高第一终端设备向第二终端设备传输数据包的性能。
第一方面，提供了一种通信方法，包括第一终端设备通过第一接口向第二终端设备传输第一数据包，所述第一接口为长期演进LTE制式中所述第一终端设备和所述第二终端设备直接通信的通信接口，或新无线NR制式中所述第一终端设备和所述第二终端设备直接通信的通信接口；所述第一终端设备通过第二接口向所述第二终端设备传输第二数据包，所述第二接口为下列接口中的任意一种：所述第一终端设备与LTE网络设备通信的通信接口，所述第一终端设备与NR网络设备通信的通信接口，LTE制式中所述第一终端设备和所述第二终端设备直接通信的通信接口，NR制式中所述第一终端设备和所述第二终端设备直接通信的通信接口，LTE制式中所述第一终端设备和中继终端设备直接通信的通信接口，以及NR制式中所述第一终端设备和所述中继终端设备直接通信的通信接口。
在本申请实施例中，通过第二接口帮助第一终端设备向第二终端设备传输数据包，避免了现有技术中，第一终端设备仅通过一个接口向第二终端设备传输数据包，有利于提高 第一终端设备和第二终端设备之间传输数据包的性能。
进一步地，由于通过终端设备与网络设备通信的通信接口传输数据包的可靠性，高于通过终端设备之间通信的直连接口传输数据包的可靠性，因此，当上述第二接口为第一终端设备与LTE网络设备通信的通信接口，或者第一终端设备与NR网络设备通信的通信接口时，可以进一步提升第一终端设备向第二终端设备传输数据包的可靠性。
可选地，上述第一接口可以指上文中提到的用于终端设备之间直接通信的直连接口，例如，设备到设备(Device to device，D2D)接口，或者车联网中的PC5接口。
上述第二接口可以是上文中提到的用于终端设备之间直接通信的直连接口，例如，D2D接口，或者车联网中的PC5接口。在第二接口为直连接口的情况下，第二接口可以是第一终端设备与第二终端设备直接通信的直连接口；第二接口还可以是第一终端设备与中继终端设备直接通信的通信接口，也就是说，第一终端设备通过与中继终端设备通信的直连接口，向第二终端设备传输数据包。
可选地，上述第一数据包为第一终端设备向第二终端设备传输的D2D数据包。
结合第一方面，在一种可能的实现方式中，所述第一数据包和所述第二数据包为同一数据流中的相同数据包。
在本申请实施例中，将一个待传输的数据包复制为两个数据包，即第一数据包和第二数据包，并分别通过第一接口和第二接口传输，相对于现有技术中只通过一个接口传输的方案而言，有利于提高数据包传输的可靠性。
结合第一方面，在一种可能的实现方式中，所述第一数据包和所述第二数据包为同一数据流中的不同数据包。
在本申请实施例中，通过第一接口和第二接口分别传输属于同一数据流的不同数据包，相对于现有技术中仅通过一个接口传输第一数据包和第二数据包而言，有利于降低传输第一数据包和第二数据包的时延。
结合第一方面，在一种可能的实现方式中，所述第一数据包和所述第二数据包被所述第二终端设备中的同一目标协议层实体汇聚。
结合第一方面，在一种可能的实现方式中，所述第一终端设备设置有第一路由层，所述第一路由层位于所述第一终端设备的分组数据汇聚协议PDCP层和所述第一终端设备的无线链路层控制协议RLC层之间，在所述第一终端设备通过第二接口向所述第二终端设备传输第二数据包之前，所述方法还包括：所述第一终端设备在所述第一路由层，为第二协议数据单元PDU添加第一路由头，所述第二PDU为所述第二数据包在所述第一终端设备的PDCP层的PDU，所述第一路由头用于指示传输所述第二数据包的路径。
在本申请实施例中，通过在第一终端设备和网络设备中的路由层，传输第二数据包，网络设备在接收第二数据包后可以根据第一路由头，直接将第二数据包转发至第二终端设备，有利于减少传输第二数据包的产生的时延。避免网络设备将第二数据包传输至核心网，导致增加传输数据包的时延。
另一方面，通过基于现有协议中的PDCP层本身的功能，对第一PDU进行汇聚，有利于降低对现有协议栈的改动。
结合第一方面，在一种可能的实现方式中，所述第一终端设备设置有第一适配层，所述第一适配层位于所述第一终端设备的PDCP层和所述第一终端设备的RLC层之间，在 所述第一终端设备通过第一接口向第二终端设备传输第一数据包之前，所述方法还包括：所述第一终端设备在所述第一适配层，为第一PDU添加第一汇聚标识，所述第一PDU为所述第一数据包在所述第一终端设备的PDCP层的PDU，第一汇聚标识用于指示在所述目标协议层实体对所述第一数据包进行数据汇聚。
在本申请实施例中，第一终端设备可以在适配层为第一PDU添加第一汇聚标识，以便于第二终端设备根据第一汇聚标识对第一PDU进行汇聚，相对于通过网络设备配置替代适配层的方案而言，减少了第一终端设备与网络设备之间的交互过程，降低传输信令带来的开销。
结合第一方面，在一种可能的实现方式中，在所述通过第一接口向第二终端设备传输第一数据包之前，所述方法还包括：所述第一终端设备接收网络设备发送的第一配置信息，所述第一配置信息用于配置所述第一终端设备通过所述第一接口传输所述第一数据包，且通过所述第二接口传输所述第二数据包。
在本申请实施例中，基于网络设备通过第一配置信息配置第一终端设备，通过第一接口传输第一数据包，通过第二接口传输第二数据包，相对于在第一终端设备和第二终端设备增加适配层的方案而言，有利于减少对第一终端设备和第二终端设备中的协议栈的改动。
结合第一方面，在一种可能的实现方式中，所述第一配置信息携带下述指示信息中的至少一种：用于指示所述第一接口对应的无线承载和所述第二接口对应的无线承载相同的指示信息；用于指示通过所述第一接口传输所述第一数据包的目的地址与通过所述第二接口传输所述第二数据包的目的地址相同的指示信息；用于指示所述第一接口对应的逻辑信道和所述第二接口对应的逻辑信道相同的指示信息。
结合第一方面，在一种可能的实现方式中，所述第一终端设置有第一汇聚层和第二路由层，在所述第一终端设备通过第二接口向所述第二终端传输第二数据包之前，所述方法还包括：所述第一终端设备从所述第一汇聚层获取第三PDU，所述第三PDU为所述第二数据包在所述第一汇聚层的PDU；所述第一终端设备在所述第二路由层，为所述第三PDU添加第二路由头，所述第三PDU为所述第二数据包在所述第一汇聚层的PDU，所述第二路由头用于指示传输所述第二数据包的路径；所述第一终端设备将携带所述第二路由头的所述第三PDU传输至所述第一终端的PDCP层。
在本申请实施例中，通过在第一终端设备中增加汇聚层对第三PDU进行汇聚，有利于减少PDCP层对第三PDU的处理过程，降低PDCP层对第三PDU进行处理的复杂度。
结合第一方面，在一种可能的实现方式中，所述第一终端设置有第二适配层，在所述第一终端设备通过第一接口向第二终端传输第一数据包之前，所述方法还包括：所述第一终端设备从所述第一汇聚层获取第四PDU，所述第四PDU为所述第一数据包在所述第一汇聚层的PDU；所述第一终端设备在所述第二适配层，为所述第四PDU添加第三汇聚标识，所述第三汇聚标识用于指示所述第一数据包所属的数据流；所述第一终端设备将携带所述第二汇聚标识的所述第四PDU传输至所述第一终端的PDCP层。
在本申请实施例中，第一终端设备可以在适配层为第四PDU添加第三汇聚标识，以便于第二终端设备根据第三汇聚标识对第四PDU进行汇聚，相对于通过网络设备配置替代适配层的方案而言，减少了第一终端设备与网络设备之间的交互过程，降低传输信令带 来的开销。
结合第一方面，在一种可能的实现方式中，在所述通过第一接口向第二终端传输第一数据包之前，所述方法还包括：所述第一终端设备接收网络设备发送的第二配置信息，所述第二配置信息用于配置所述第一终端设备通过所述第一接口传输所述第一数据包，且通过所述第二接口传输所述第二数据包。
在本申请实施例中，基于网络设备通过第二配置信息配置第一终端设备，通过第一接口传输第一数据包，通过第二接口传输第二数据包，相对于在第一终端设备和第二终端设备增加适配层的方案而言，有利于减少对第一终端设备和第二终端设备中的协议栈的改动。
结合第一方面，在一种可能的实现方式中，所述第二配置信息携带下述指示信息中的至少一种：用于指示所述第一接口对应的无线承载和所述第二接口对应的无线承载相同的指示信息；用于指示通过所述第一接口传输所述第一数据包的目的地址与通过所述第二接口传输所述第二数据包的目的地址相同的指示信息；用于指示所述第一接口对应的逻辑信道和所述第二接口对应的逻辑信道相同的指示信息。
结合第一方面，在一种可能的实现方式中，在所述第一终端设备通过第一接口向第二终端设备传输第一数据包之前，所述方法还包括：所述第一终端设备接收所述网络设备发送的多接口传输指示信息，所述多接口传输指示信息用于指示所述第一终端设备通过两个接口向所述第二终端设备传输所述第一数据包和第二数据包，和/或所述多接口传输指示信息还用于指示所述第一数据包和所述第二数据包中携带的数据是否相同。
结合第一方面，在一种可能的实现方式中，在所述第一终端设备接收所述网络设备发送的多接口传输指示信息之前，所述方法还包括：所述第一终端设备向所述网络设备发送多接口传输请求，所述多接口传输请求用于向网络设备请求通过多接口向所述第二终端设备传输所述第一数据包和所述第二数据包。
结合第一方面，在一种可能的实现方式中，所述第一终端设备接收网络设备发送的多接口传输指示信息，包括：所述第一终端设备接收所述网络设备发送的系统信息块SIB，所述SIB携带所述多接口传输指示信息；或所述第一终端设备接收所述网络设备发送的专用信令，所述专用信令携带所述多接口传输指示信息。
第二方面，提供一种通信方法，包括：第二终端设备通过第一接口接收第一终端设备发送的第一数据包，所述第一接口为长期演进LTE制式中所述第一终端设备和所述第二终端设备直接通信的通信接口，或新无线NR制式中所述第一终端设备和所述第二终端设备直接通信的通信接口；所述第二终端设备通过第二接口接收所述第一终端设备发送的第二数据包，所述第二接口为下列接口中的任意一种：所述第一终端设备与LTE网络设备通信的通信接口，所述第一终端设备与NR网络设备通信的通信接口，LTE制式中所述第一终端设备和所述第二终端设备直接通信的通信接口，NR制式中所述第一终端设备和所述第二终端设备直接通信的通信接口，LTE制式中所述第一终端设备和中继终端设备直接通信的通信接口，以及NR制式中所述第一终端设备和所述中继终端设备直接通信的通信接口。
在本申请实施例中，通过第二接口帮助第一终端设备向第二终端设备传输数据包，避免了现有技术中，第一终端设备仅通过一个接口向第二终端设备传输数据包，有利于提高 第一终端设备和第二终端设备之间传输数据包的性能。
进一步地，由于通过终端设备与网络设备通信的通信接口传输数据包的可靠性，高于通过终端设备之间通信的直连接口传输数据包的可靠性，因此，当上述第二接口为第一终端设备与LTE网络设备通信的通信接口，或者第一终端设备与NR网络设备通信的通信接口时，可以进一步提升第一终端设备向第二终端设备传输数据包的可靠性。
可选地，上述第一接口可以指上文中提到的用于终端设备之间直接通信的直连接口，例如，设备到设备(Device to device，D2D)接口，或者车联网中的PC5接口。
上述第二接口可以是上文中提到的用于终端设备之间直接通信的直连接口，例如，D2D接口，或者车联网中的PC5接口。在第二接口为直连接口的情况下，第二接口可以是第一终端设备与第二终端设备直接通信的直连接口；第二接口还可以是第一终端设备与中继终端设备直接通信的通信接口，也就是说，第一终端设备通过与中继终端设备通信的直连接口，向第二终端设备传输数据包。
可选地，上述第一数据包为第一终端设备向第二终端设备传输的D2D数据包。
结合第二方面，在一种可能的实现方式中，所述第一数据包和所述第二数据包为同一数据流中的相同数据包。
在本申请实施例中，将一个待传输的数据包复制为两个数据包，即第一数据包和第二数据包，并分别通过第一接口和第二接口传输，相对于现有技术中只通过一个接口传输的方案而言，有利于提高数据包传输的可靠性。
结合第二方面，在一种可能的实现方式中，所述第一数据包和所述第二数据包为同一数据流中的不同数据包。
在本申请实施例中，通过第一接口和第二接口分别传输属于同一数据流的不同数据包，相对于现有技术中仅通过一个接口传输第一数据包和第二数据包而言，有利于降低传输第一数据包和第二数据包的时延。
结合第二方面，在一种可能的实现方式中，所述第一数据包和所述第二数据包被所述第二终端设备中的同一目标协议层实体汇聚。
结合第二方面，在一种可能的实现方式中，所述目标协议层实体为分组数据汇聚协议PDCP实体，所述第二终端设备设置有第一路由层，所述第一路由层位于所述第二终端设备的PDCP层和所述第二终端设备的无线链路层控制协议RLC层之间，所述第二终端设备通过第二接口接收所述第一终端设备传输第二数据包，包括：所述第二终端设备在所述第一路由层，对携带第一路由头的第二协议数据单元PDU进行解封装，并将所述第二PDU传输至所述PDCP实体，所述第二PDU为所述第二数据包在所述第一终端设备的PDCP层的PDU，所述第一路由头用于指示传输所述第二数据包的路径。
在本申请实施例中，通过在第二终端设备中的PDCP层本身对第二PDU的汇聚，重复检测，重复丢弃功能，对第二PDU进行汇聚，有利于降低对现有协议栈的改动。
在本申请实施例中，通过在第二终端设备和网络设备中的路由层，传输第二数据包，网络设备在接收第二数据包后可以根据第一路由头，直接将第二数据包转发至第二终端设备，有利于减少传输第二数据包的产生的时延。避免网络设备将第二数据包传输至核心网，导致增加传输数据包的时延。
结合第二方面，在一种可能的实现方式中，所述第二终端设备设置有第一适配层，所 述第一适配层位于所述第二终端设备的PDCP层和所述第二终端设备的RLC层之间，所述第二终端设备通过第一接口接收第一终端设备发送的第一数据包，包括：所述第二终端设备在所述第一适配层，根据第一PDU携带的第一汇聚标识，将所述第一PDU传输至所述PDCP实体，所述第一PDU为所述第一数据包在所述第一终端设备的PDCP层的PDU，第一汇聚标识用于指示在所述目标协议层实体对所述第一数据包进行汇聚。
在本申请实施例中，第二终端设备根据第一汇聚标识对第一PDU进行汇聚，相对于通过网络设备配置替代适配层的方案而言，减少了第一终端设备与网络设备之间的交互过程，降低传输信令带来的开销。
结合第二方面，在一种可能的实现方式中，在所述第二终端设备通过第一接口接收第一终端设备发送的第一数据包之前，所述方法还包括：所述第二终端设备接收网络设备发送的第一配置信息，所述第一配置信息用于配置所述第一终端设备通过所述第一接口传输所述第一数据包，且通过所述第二接口传输所述第二数据包。
在本申请实施例中，基于网络设备通过第一配置信息配置第二终端设备，通过第一接口接收第一数据包，通过第二接口接收第二数据包，相对于在第一终端设备和第二终端设备增加适配层的方案而言，有利于减少对第一终端设备和第二终端设备中的协议栈的改动。
结合第二方面，在一种可能的实现方式中，所述第一配置信息携带下述指示信息中的至少一种：用于指示所述第一接口对应的无线承载和所述第二接口对应的无线承载相同的指示信息；用于指示通过所述第一接口传输所述第一数据包的目的地址与通过所述第二接口传输所述第二数据包的目的地址相同的指示信息；用于指示所述第一接口对应的逻辑信道和所述第二接口对应的逻辑信道相同的指示信息。
结合第二方面，在一种可能的实现方式中，所述第二终端设备设置有第一汇聚层和第二路由层，所述目标协议层实体为所述第一汇聚层的第一汇聚实体，所述第二终端设备通过第二接口接收所述第一终端设备传输第二数据包，包括：所述第二终端设备从所述第二终端设备的PDCP层获取第三PDU，所述第三PDU为所述第二数据包在所述第一终端设备的PDCP层的PDU；所述第二终端设备在所述第二路由层，对携带第二路由头的第三PDU进行解封装，并将所述第三PDU传输至所述第一汇聚实体，所述第二路由头用于指示传输所述第二数据包的路径；所述第二终端设备在所述第一汇聚层，通过所述第一汇聚实体对所述第二数据包进行汇聚。
在本申请实施例中，通过在第二终端设备中增加汇聚层对第三PDU进行汇聚，有利于减少PDCP层对第三PDU的处理过程，降低PDCP层对第三PDU进行处理的复杂度。
结合第二方面，在一种可能的实现方式中，所述第二终端设备设置有第二适配层，所述第二终端设备通过第一接口接收第一终端设备发送的第一数据包，包括：所述第二终端设备从所述第二终端设备的PDCP层获取第四PDU，所述第四PDU为所述第一数据包在所述第一终端设备的PDCP层的PDU；所述第二终端设备在所述第二适配层，根据所述第四PDU携带的第三汇聚标识，将所述第四PDU传输至所述第一汇聚实体，第三汇聚标识用于指示所述第一数据包所属的数据流；所述第二终端设备在所述第一汇聚层，通过所述第一汇聚实体对所述第一数据包进行数据汇聚。
在本申请实施例中，第二终端设备可以在适配层，根据第三汇聚标识对第四PDU进 行汇聚，相对于通过网络设备配置替代适配层的方案而言，减少了第一终端设备与网络设备之间的交互过程，降低传输信令带来的开销。
结合第二方面，在一种可能的实现方式中，在所述通过第一接口接收第一终端设备传输第一数据包之前，所述方法还包括：所述第二终端设备接收网络设备发送的第二配置信息，所述第二配置信息用于配置所述第一终端设备通过所述第一接口传输所述第一数据包，且通过所述第二接口传输所述第二数据包。
在本申请实施例中，基于网络设备通过第二配置信息配置第一终端设备，通过第一接口传输第一数据包，通过第二接口传输第二数据包，相对于在第一终端设备和第二终端设备增加适配层的方案而言，有利于减少对第一终端设备和第二终端设备中的协议栈的改动。
结合第二方面，在一种可能的实现方式中，所述第二配置信息携带下述指示信息中的至少一种：用于指示所述第一接口对应的无线承载和所述第二接口对应的无线承载相同的指示信息；用于指示通过所述第一接口传输所述第一数据包的目的地址与通过所述第二接口传输所述第二数据包的目的地址相同的指示信息；用于指示所述第一接口对应的逻辑信道和所述第二接口对应的逻辑信道相同的指示信息。
第三方面，提供了一种通信方法，包括：网络设备向第一终端设备发送多接口传输指示信息，所述多接口传输指示信息用于指示所述第一终端设备通过多接口向所述第二终端设备传输所述第一数据包和第二数据包，和/或所述多接口传输指示信息还用于指示所述第一数据包和所述第二数据包中携带的数据是否相同。
在本申请实施例中，通过网络设备为第一终端设备配置通过多接口传输数据包的功能，有利于提高第一终端设备传输第一数据包和第二数据包的性能。
可选地，所述第一数据包和所述第二数据包为同一数据流中的相同数据包。
可选地，所述第一数据包和所述第二数据包为同一数据流中的不同数据包。
结合第三方面，在一种可能的实现方式中，在所述网络设备向第一终端设备发送多接口传输指示信息之前，所述方法还包括：所述网络设备接收所述第一终端设备发送的多接口传输请求，所述多接口传输请求用于向所述网络设备请求通过多接口向所述第二终端设备传输所述第一数据包和所述第二数据包。
结合第三方面，在一种可能的实现方式中，所述网络设备接收所述第一终端设备发送的多接口传输请求，包括：所述网络设备接收所述第一终端设备发送的系统信息块SIB，所述SIB携带所述多接口传输指示信息；或所述网络设备接收所述第一终端设备发送的专用信令，所述专用信令携带所述多接口传输指示信息。
结合第三方面，在一种可能的实现方式中，所述多接口包括第一接口和第二接口，所述方法还包括：所述网络设备向所述第一终端设备发送的第一配置信息，所述第一配置信息用于配置所述第一终端设备通过所述第一接口传输所述第一数据包，且通过所第二接口传输所述第二数据包。
结合第三方面，在一种可能的实现方式中，所述第一配置信息携带下述指示信息中的至少一种：用于指示所述第一接口对应的无线承载和所述第二接口对应的无线承载相同的指示信息；用于指示通过所述第一接口传输所述第一数据包的目的地址与通过所述第二接口传输所述第二数据包的目的地址相同的指示信息；以及用于指示所述第一接口对应的逻 辑信道和所述第二接口对应的逻辑信道相同的指示信息。
第四方面，提供了一种第一终端设备，所述第一终端设备包括用于执行第一方面或第一方面任一种可能实现方式中的各个模块。
第五方面，提供了一种第二终端设备，所述第二终端设备包括用于执行第二方面或第一方面任一种可能实现方式中的各个模块。
第六方面，提供了一种网络设备，所述网络设备包括用于执行第三方面或第一方面任一种可能实现方式中的各个模块。
第七方面，提供了一种第一终端设备，所述终端设备具有实现上述第一方面的方法设计中的终端设备的功能。这些功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元。
第八方面，提供了一种第二终端设备，所述终端设备具有实现上述第二方面的方法设计中的终端设备的功能。这些功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元。
第九方面，提供了一种网络设备，所述网络设备具有实现上述第三方面的方法设计中的网络设备的功能。这些功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元。
第十方面，提供了一种第一终端设备，包括收发器、处理器和存储器。该处理器用于控制收发器收发信号，该存储器用于存储计算机程序，该处理器用于从存储器中调用并运行该计算机程序，使得该终端设备执行上述第一方面中的方法。
第十一方面，提供了一种第二终端设备，包括收发器、处理器和存储器。该处理器用于控制收发器收发信号，该存储器用于存储计算机程序，该处理器用于从存储器中调用并运行该计算机程序，使得该终端设备执行上述第二方面中的方法。
第十二方面，提供了一种第二终端设备，包括收发器、处理器和存储器。该处理器用于控制收发器收发信号，该存储器用于存储计算机程序，该处理器用于从存储器中调用并运行该计算机程序，使得该终端设备执行上述第二方面中的方法。
第十三方面，提供了一种网络设备，包括收发器、处理器和存储器。该处理器用于控制收发器收发信号，该存储器用于存储计算机程序，该处理器用于从存储器中调用并运行该计算机程序，使得该网络设备执行上述第三方面中的方法。
第十四方面，提供一种通信装置。该通信装置可以为上述方法设计中的第一终端设备，或者为设置在终端设备中的芯片。该通信装置包括：存储器，用于存储计算机可执行程序代码；通信接口，以及处理器，处理器与存储器、通信接口耦合。其中存储器所存储的程序代码包括指令，当处理器执行所述指令时，使通信装置执行上述第一方面或第一方面的任意一种可能的设计中终端设备所执行的方法。
第十五方面，提供一种通信装置。该通信装置可以为上述方法设计中的第二终端设备，或者为设置在终端设备中的芯片。该通信装置包括：存储器，用于存储计算机可执行程序代码；通信接口，以及处理器，处理器与存储器、通信接口耦合。其中存储器所存储的程序代码包括指令，当处理器执行所述指令时，使通信装置执行上述第二方面或第二方面的任意一种可能的设计中终端设备所执行的方法。
第十六方面，提供一种通信装置。该通信装置可以为上述方法设计中的网络设备，或 者为设置在网络设备中的芯片。该通信装置包括：存储器，用于存储计算机可执行程序代码；通信接口，以及处理器，处理器与存储器、通信接口耦合。其中存储器所存储的程序代码包括指令，当处理器执行所述指令时，使通信装置执行上述第三方面或第三方面的任意一种可能的设计中网络设备所执行的方法。
第十七方面，提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码在计算机上运行时，使得计算机执行上述各方面中的方法。
第十八方面，提供了一种计算机可读介质，所述计算机可读介质存储有程序代码，当所述计算机程序代码在计算机上运行时，使得计算机执行上述各方面中的方法。
第十九方面，提供了一种芯片系统，该芯片系统包括处理器，用于第一终端设备或第二终端设备实现上述方面中所涉及的功能，例如，生成，接收，发送，或处理上述方法中所涉及的数据和/或信息。在一种可能的设计中，所述芯片系统还包括存储器，所述存储器，用于保存终端设备必要的程序指令和数据。该芯片系统，可以由芯片构成，也可以包括芯片和其他分立器件。
第二十方面，提供了一种芯片系统，该芯片系统包括处理器，用于支持网络设备实现上述方面中所涉及的功能，例如，生成，接收，发送，或处理上述方法中所涉及的数据和/或信息。在一种可能的设计中，所述芯片系统还包括存储器，所述存储器，用于保存网络设备必要的程序指令和数据。该芯片系统，可以由芯片构成，也可以包括芯片和其他分立器件。
第二十一方面，一种通信系统，所述通信系统包括上述第一终端设备和第二终端设备。
附图说明
图1是本申请实施例应用的无线通信系统100。
图2是本申请实施例的通信方法的示意性流程图。
图3是本申请实施例的通信系统中协议栈架构的示意性框图。
图4是本申请实施例的PDU的封装结构的示意性框图。
图5是本申请实施例的通信系统中协议栈架构的示意性框图。
图6示出了本申请另一实施例的通信系统中协议栈的架构的示意性框图。
图7是本申请另一实施例的通信系统中协议栈架构的示意性框图。
图8是本申请另一实施例的PDU的封装结构的示意性框图。
图9是本申请实施例的通信系统中协议栈架构的示意性框图。
图10示出了本申请实施例的通信系统中协议栈的架构的示意性框图。
图11示出了本申请实施例的基于双直连接口的协议栈架构的示意性框图。
图12示出了本申请另一实施例的基于双直连接口的协议栈架构的示意性框图。
图13是本申请实施例的第一终端设备的示意性框图。
图14是本申请另一实施例的第一终端设备的示意性框图。
图15是本申请实施例的第二终端设备的示意性框图。
图16是本申请另一实施例的第二终端设备的示意性框图。
具体实施方式
为了便于理解，先结合图1介绍本申请实施例适用的场景。
图1是本申请实施例应用的无线通信系统100。该无线通信系统100可以包括网络设备110和终端设备。网络设备110可以是与终端设备通信的设备。网络设备110可以为特定的地理区域提供通信覆盖，并且可以与位于该覆盖区域内的终端设备进行通信。
图1示例性地示出了一个网络设备和两个终端(第一终端设备120和第二终端设备130)，可选地，该无线通信系统100可以包括多个网络设备并且每个网络设备的覆盖范围内可以包括其它数量的终端，本申请实施例对此不做限定。
可选地，该无线通信系统100还可以包括网络控制器、移动管理实体等其他网络实体，本申请实施例对此不作限定。
应理解，本申请的技术方案可以应用于各种通信系统，例如：全球移动通讯(Global System of Mobile communication，GSM)系统、码分多址(Code Division Multiple Access，CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统、通用分组无线业务(General Packet Radio Service，GPRS)、长期演进(Long Term Evolution，LTE)系统、先进的长期演进(Advanced long term evolution，LTE-A)系统、通用移动通信系统(Universal Mobile Telecommunication System，UMTS)、新空口(New Radio Access Technology，NR)、5G等。
还应理解，在本申请实施例中，终端可以包括但不限于应用于车联网中的终端设备，例如，可以是接入车联网的终端设备，例如，可以是车载终端设备；该终端还可以包括但不限于移动台(Mobile Station，MS)、移动终端(Mobile Terminal)、移动电话(Mobile Telephone)、用户设备(User Equipment，UE)、手机(handset)及便携设备(portable equipment)等，该终端设备可以经无线接入网(Radio Access Network，RAN)与一个或多个核心网进行通信，例如，终端设备可以是移动电话(或称为“蜂窝”电话)、具有无线通信功能的计算机等，终端设备还可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置。
本申请实施例中，网络设备可以是接入网设备，例如可以是基站、发射和接收点(Transmit and Receive Point，TRP)或接入点，基站可以是GSM或CDMA中的基站(Base Transceiver Station，BTS)，也可以是WCDMA中的基站(NodeB)，还可以是LTE中的演进型基站(evolved Node B，eNB或e-NodeB)，还可以是NR或5G的基站(gNB)，本申请实施例对此不作具体限定。
在图1所示的通信系统中，第一终端设备120可以通过直连接口与第二终端设备130进行通信，该直连接口可以理解为用于终端之间直接通信的空口，例如，可以是D2D接口，或者车联网中的PC5接口。通过上述直连接口在终端之间进行数据传输，可以无需网络设备参与数据的传输过程，有利于降低终端设备间传输数据的时延，但是，由于直连接口传输数据的可靠性不够高，不利于提高终端设备间传输数据的可靠性。
为了提高终端设备间传输数据的可靠性，本申请实施例提供了一种通信方法，有利于提高终端设备间传输数据包的效率。
下面结合附图，对本申请实施例的方法进行描述。
图2是本申请实施例的通信方法的示意性流程图。应理解，图2所示的第一终端设备可以是图1所示的第一终端设备，或者位于第一终端设备上的芯片；第二通信装置可以是 图1所示的第二终端设备，或者位于第二终端设备上的芯片。图2所示的方法包括步骤210至步骤240。
210，第一终端设备通过第一接口向第二终端设备传输第一数据包，所述第一接口为长期演进LTE制式中所述第一终端设备和所述第二通信装置直接通信的通信接口，或新无线NR制式中所述第一终端设备和所述第二通信装置直接通信的通信接口。
具体地，上述第一接口可以指上文中提到的用于终端设备之间直接通信的直连接口，例如，设备到设备(Device to device，D2D)接口，或者车联网中的PC5接口。
可选地，上述第一数据包为第一终端设备向第二终端设备传输的D2D数据包。
220，所述第一终端设备通过第二接口向所述第二通信装置传输第二数据包，所述第二接口为下列接口中的任意一种：所述第一终端设备与LTE网络设备通信的通信接口，所述第一终端设备与NR网络设备通信的通信接口，LTE制式中所述第一终端设备和所述第二终端设备直接通信的通信接口，NR制式中所述第一终端设备和所述第二终端设备直接通信的通信接口，LTE制式中所述第一终端设备和中继终端设备直接通信的通信接口，以及NR制式中所述第一终端设备和所述中继终端设备直接通信的通信接口。
具体地，上述第二接口可以是上文中提到的用于终端设备之间直接通信的直连接口，例如，D2D接口，或者车联网中的PC5接口。
在第二接口为直连接口的情况下，第二接口可以是第一终端设备与第二终端设备直接通信的直连接口；第二接口还可以是第一终端设备与中继终端设备直接通信的通信接口，也就是说，第一终端设备通过与中继终端设备通信的直连接口，向第二终端设备传输数据包。
需要说明的是，上述中继终端设备可以包括一个或多个终端设备，本申请实施例对此不作具体限定。
上述第二接口还可以是第一终端设备与网络设备通信的接口，又称非直连接口。例如，Uu接口。也就是说，第一终端设备通过网络设备向第二终端设备传输数据包。
可选地，当上述第二接口为非直连接口时，通过第二接口接收第二数据包的第二终端设备可以属于一个终端设备集合，也就是说，第一终端设备通过第二接口传输第二数据包的过程中，网络设备可以通过组播或广播的方式帮助第一终端设备将第二数据包发送至终端设备集合，该终端设备集合包括第二终端设备。
需要说明的是，上述第一终端设备通过网络设备向第二终端设备传输数据包，具体可以分为以下两种通信场景。
通信场景一：第一终端设备和第二终端设备属于同一个网络设备。也就是说第一终端设备和第二终端设备接入同一个网络设备时，上文中帮助第一终端设备向第二终端设备转发第二数据包的网络设备为第一终端设备和第二终端设备接入的网络设备。
通信场景二：第一终端设备和第二终端设备属于不同的网络设备。为了便于区分，将第一终端设备接入的网络设备称为第一网络设备，将第二终端设备接入的网络设备称为第二网络设备。此时，上文中帮助第一终端设备向第二终端设备转发第二数据包的网络设备，可以包括第一网络设备和第二网络设备。
在本申请实施例中，通过第二接口帮助第一终端设备向第二终端设备传输数据包，避免了现有技术中，第一终端设备仅通过一个接口向第二终端设备传输数据包，有利于提高 第一终端设备和第二终端设备之间传输数据包的性能。
进一步地，由于通过终端设备与网络设备通信的通信接口传输数据包的可靠性，高于通过终端设备之间通信的直连接口传输数据包的可靠性，因此，当上述第二接口为第一终端设备与LTE网络设备通信的通信接口，或者第一终端设备与NR网络设备通信的通信接口时，可以进一步提升第一终端设备向第二终端设备传输数据包的可靠性。
可选地，作为一个实施例，所述第一数据包和所述第二数据包为同一数据流中相同的数据包。
具体地，上述第一数据包和第二数据包为同一数据流中相同的数据包可以理解为，第一数据包和第二数据包原本是应该通过同一接口，在同一路径上传输的一个数据包。也就是说，可以将第二数据包理解为对第一数据包进行复制生成的数据包，或者将第一数据包理解为对第二数据包进行复制生成的数据包。
在本申请实施例中，将一个待传输的数据包复制为两个数据包，即第一数据包和第二数据包，并分别通过第一接口和第二接口传输，相对于现有技术中只通过一个接口传输的方案而言，有利于提高数据包传输的可靠性。
可选地，作为一个实施例，所述第一数据包和所述第二数据包为同一数据流中的不同数据包。
具体地，上述第一数据包和第二数据包为同一数据流中的不同数据包，可以理解为第一数据包和第二数据包原本是应该通过同一接口，在同一路径上传输的不同数据包。
在本申请实施例中，通过第一接口和第二接口分别传输属于同一数据流的不同数据包，相对于现有技术中仅通过一个接口传输第一数据包和第二数据包而言，有利于降低传输第一数据包和第二数据包的时延。
可选地，作为一个实施例，所述第一数据包和所述第二数据包被所述第二终端设备中的同一目标协议层实体汇聚。也就是说，现有技术中原本通过一个路径传输至同一目标协议层实体进行汇聚的数据包，在本申请实施例中，虽然分别通过两个不同的接口进行传输，但是最终汇聚的目标协议层实体仍然是相同的协议层实体。
为了实现上述将分别通过两个接口传输的数据包，发送至同一个目标协议层实体进行汇聚，本申请实施例对现有的协议栈进行了改进，提供了多种不同的协议栈。下文结合附图，详细说明每种协议栈的架构，以及传输数据包的方式。
第一类协议栈架构：适用于上文的通信场景一，且第一接口为上述第一终端设备和第二终端设备通信的直连接口，第二接口为第一终端设备与网络设备之间通信的非直连接口，其中，第一终端设备、第二终端设备、以及网络设备中的协议栈架构如图3所示。
图3是本申请实施例的通信系统中协议栈架构的示意性框图。应理解，图3仅仅示出第一终端设备、第二终端设备以及网络设备中与本申请实施例相关的协议层，第一终端设备、第二终端设备以及网络设备还可以包括其他协议层，本申请实施例对此不作具体限定。
从图3所示的协议栈架构中，第一终端设备和第二终端设备的直连接口对应的协议栈架构中添加了适配层(Adaption Layer)，其中适配层可以位于第一终端设备的PDCP层和RLC层之间。第一终端设备和第二终端设备的非直连接口对应的协议栈架构中添加了路由层(Routing Layer)，又称“第一路由层”。其中路由层可以位于第一终端设备的PDCP层和RLC层之间。网络设备在非直连接口对应的协议栈架构中添加了路由层(Routing  Layer)，其中网路设备中的路由层的位置与第一终端设备中路由层的位置相同。
下文结合图3所示的第一接口的协议栈架构，介绍通过第一接口和第二接口传输数据包的过程。具体的数据包传输过程可以分为两种情况。为了便于说明，将第一数据包对应的协议数据单元(Protocol Data Unit，PDU)称为“第一PDU”，将第二数据包对应的PDU称为“第二PDU”。
情况一：第一数据包和第二数据包为相同的数据包。
在第一终端设备的PDCP层，对第一PDU进行复制生成第二PDU，第二PDU和第一PDU可以具有相同的PDCP序列号(Sequence Number，SN)。并将第一PDU传输至第一终端设备的适配层，将第二PDU传输至第一终端设备的路由层。
在第一终端设备的适配层，为第一PDU添加第一汇聚标识，第一汇聚标识用于指示在所述目标协议层实体对所述第一数据包进行数据汇聚，或者说第一汇聚标识用于指示对第一数据包进行汇聚的协议层实体。
在第一终端设备的路由层，为第二协议数据单元PDU添加第一路由头以及第二汇聚标识，所述第二PDU为所述第二数据包在所述第一终端设备的PDCP层的PDU，所述第一路由头用于指示传输所述第二数据包的路径，所述第二汇聚标识用于指示在所述目标协议层实体对所述第二数据包进行数据汇聚，或者说第二汇聚标识用于指示对第二数据包进行汇聚的协议层实体。
可选地，上述为第二PDU添加第一路由头，可以理解为以基于路由头(Routing-header)协议对第二PDU进行封装。第一路由头可以包括源信息(Source Information，Src Info)，目的信息(destination Information，Dst Info)，可选地，上述第一路由头还可以包括服务质量要求信息(Quality of Service Information，QoS Info)、时间信息(Time information，Time Info)以及测量信息(Measurement information，Measurement Info)中的至少一种，具体地的PDU封装结构可以参见图4。
具体地，上述源信息用于指示第一终端设备，具体地可以是第一终端设备的地址信息，例如互联网协议(Internet Protocol，IP)地址，媒体访问控制(Media Access Control，MAC)地址，第一终端设备的标识信息等。其中，第一终端设备的标识信息可以是国际移动用户识别码(International Mobile Subscriber Identification Number，IMSI)，或者为了保护隐私网络可能分配给终端的临时标识，或者源终端位置信息等。
目的信息用于指示第二终端设备，具体地可以是第二终端设备的地址信息、第二终端设备标识信息、第二终端设备所在的终端设备集合的地址信息或第二终端设备所在的终端设备集合标识信息。如终端设备集合对应的IP组播地址，终端设备集合对应的MAC组播地址、或者网络分配的终端设备集合的群组ID等。
QoS信息用于确定传输第二PDU的服务等级，可以通过优先级表示。
Time信息用于表示与第二数据包相关的时间信息，例如，第二数据包的产生时间，第二数据包的预期发送时间、第二数据包的最晚发送时间等。
需要说明的是，上述第一终端设备获取目的信息的过程可以是由网络设备向第一终端设备指示的，也可以是第一终端设备和第二终端设备协商获取的，本申请实施例对第一终端设备获取上述目的信息的方式不做具体限定。
之后，将携带第一汇聚标识的第一PDU，以及携带第一路由头和第二汇聚标识的第 二PDU分别传输至第一终端设备的RLC层中不同的RLC实体。
需要说明的是，第一PDU和第二PDU在RLC层及RLC层之下的PDU处理过程，与现有技术中，传输PDU的过程基本相同，为了简洁，在此不再赘述。
网络设备在通过第二接口接收到第二数据包后，在网络设备中的路由层，通过第二PDU携带的目的信息，确定接收第二数据包的第二终端设备，并将第二数据包转发至第二终端设备。
第二终端设备通过第一接口接收第一数据包之后，在第二终端设备的适配层，对携带第一汇聚标识的第一PDU进行解封装，根据第一汇聚标识将第一PDU传输至对第一PDU进行汇聚的目标协议层实体，即PDCP实体。
第二终端设备通过第二接口接收第二数据包之后，在第二终端设备的路由层，对携带第二汇聚标识的第二PDU进行解封装，根据第二汇聚标识将第二PDU传输至对第二PDU进行汇聚的目标协议层实体，即PDCP实体。
第二终端设备的PDCP实体对第一PDU和第二PDU进行汇聚，在第一数据包和第二数据包是基于同一个数据包生成的情况下，PDCP实体可以丢弃上述第一数据包和第二数据包中的任意一个。
需要说明的是，上述情况一仅仅说明了第二数据包是基于第一数据包复制的情况，也可以是第一数据包是基于第二数据包进行复制生成的，具体地的其他传输过程与上文中描述的基本相同，为了简洁，在此不再赘述。
在本申请实施例所示的协议栈架构中，基于现有的协议栈中PDCP层对数据包进行汇聚的功能，对通过第一接口和第二接口接收的第一数据包和第二数据包进行汇聚，对现有的协议栈的改动较小。
情况二，第一数据包和第二数据包为不同的数据包。
具体地，在第一终端设备的PDCP层，将同一数据流中不同的两个数据包，第一数据包和第二数据包，分别传输至第一终端设备的适配层和第一终端设备的路由层，其中第一数据包的序列号和第二数据包的PDCP序列号不同。
需要说明的是，上述情况一和情况二中传输数据包过程，仅仅是在PDCP层是否需要对待传输的第一数据包进行复制的步骤略微不同，在情况二中，PDCP层无需再执行对数据包进行复制的过程，可以直接传输待传输的第一数据包和第二数据包。其中，第一数据包在第一接口对应的协议栈中的传输过程，与第二数据包在第二接口对应的协议栈中的传输过程与上述情况一中描述的数据包在协议栈中的传输过程相同，为了简洁，在此不在赘述。
第二类协议栈架构，适用于上文中的通信场景二，且第一接口为第一终端设备和第二终端设备通信的直连接口，第二接口为第一终端设备与网络设备之间通信的非直连接口。其中，第一终端设备、第二终端设备以及网络设备中的协议栈架构如图5所示。
图5是本申请实施例的通信系统中协议栈架构的示意性框图。应理解，图5仅仅示出第一终端设备、第二终端设备、第一网络设备和第二网络设备中与本申请实施例相关的协议层，第一终端设备、第二终端设备、第一网络设备和第二网络设备还可以包括其他协议层，本申请实施例对此不作具体限定。
图5所示的协议栈架构与图3所示的协议栈的架构基本相同，详细的介绍可以参见上 文中关于第一类协议栈的介绍，下文重点介绍与图3所示的协议栈的区别，即通过第一终端设备与第一网络设备之间的非直连接口传输第二数据包的过程。
由于第一终端设备接入第一网络设备，第二终端设备接入第二网络设备，因此在第一终端设备通过第二接口向第二终端设备传输数据包的过程中，需要通过两个网络设备进行转发，即在第一网络设备和第二网络设备上需要分别设置有路由层，用于将第二数据包转发至第二终端设备。
在第一终端设备的路由层，对第二PDU封装第一路由头的过程中，除了需要封装上文中提到的目的信息指示接收第二数据包的第二终端设备之外，还需要在第一路由头中封装第二网络设备的标识信息，具体地还可以封装第一网络设备的标识信息。换句话说，在第一终端设备的路由层，为第二PDU添加第一路由头的过程中，需要在第一路由头中添加可路由信息，可路由信息用于指示可以为第一终端设备向第二终端设备转发第二数据包的路由设备，具体地，路由设备可以包括第一网络设备和第二网络设备。
需要说明的是，上述第一终端设备所属的第一网络设备的标识信息和第二终端设备所属的第二网络设备的标识信息，可以通过第一终端设备和第二终端设备之间的协商获取。
第三类协议栈架构，通过网络设备配置实现通过第一接口和第二接口传输同一数据流中的数据包。
第三类协议栈可以理解为对上述第一类协议栈和第二类协议栈进行改进，通过网络设备配置的方式替代适配层，以及路由层中添加第一汇聚标识或第二汇聚标识的功能。图6示出了本申请另一实施例的通信系统中协议栈的架构的示意性框图，应理解，图6仅仅示出了第一终端设备和第二终端设备中协议栈架构，由于在第三类协议栈架构中网络设备的协议栈架构同上述第二类协议栈和第一类协议栈架构中网络设备中的协议栈架构，为了简洁，在此不再赘述。
在图6所示的协议栈架构中，第一终端设备将从PDCP层获取的第一PDU传输至第一接口对应的RLC实体，最终通过第一接口传输至第二终端设备；将从PDCP层获取的第二PDU传输至第二接口对应的路由层，进行添加第一路由头的处理，然后将携带第一路由头的第二PDU传输至第二接口对应的RLC实体，最终通过第二接口传输至第二终端设备。
具体地，在步骤210之前，所述方法还包括：所述第一终端设备接收网络设备发送的第一配置信息，所述第一配置信息用于配置所述第一终端设备通过所述第一接口传输所述第一数据包，且通过所述第二接口传输所述第二数据包。
需要说明的是，上述第一终端设备和第二终端设备所属的网络设备相同时，上述发送第一配置信息的网络设备为第一终端设备和第二终端设备所属的网络设备；第一终端设备和第二终端设备所述的网络设备不同时，上述发送第一配置信息的网络设备为第一终端设备接入的第一网络设备。
还应理解，上述第一终端设备接入第一网络设备，第二终端设备接入第二网络设备时，第一网络设备和第二网络设备协商确定可以用于为第一终端设备向第二终端设备传输数据包的第一接口和第二接口。最终，可以由第一网络设备向第一终端设备通过第一配置信息为第一终端设备进行配置，由第二网络设备向第二终端设备通过第三配置信息进行配置，第三配置信息与第一配置信息的功能相同，可以携带相同的指示信息，具体指示信息 的内容见下文详细描述。
可选地，所述第一配置信息携带下述指示信息中的至少一种：用于指示所述第一接口对应的无线承载和所述第二接口对应的无线承载相同的指示信息；用于指示通过所述第一接口传输所述第一数据包的目的地址与通过所述第二接口传输所述第二数据包的目的地址相同的指示信息；用于指示所述第一接口对应的逻辑信道和所述第二接口对应的逻辑信道相同的指示信息。
在本申请实施例中，通过网络设备配置第一接口和第二接口为第一终端设备向第二终端设备传输数据包，替代在协议栈的架构中新增适配层，有利于减小对现有协议栈的改进，减小改进协议栈所需的成本。
第四类协议栈架构：适用于上文的通信场景一，且第一接口为上述第一终端设备和第二终端设备通信的直连接口，第二接口为第一终端设备与网络设备之间通信的非直连接口，其中，第一终端设备、第二终端设备、以及网络设备中的协议栈架构如图7所示。相对于前三类协议栈架构而言，本申请实施例提供的设计思路是希望将第一终端设备中对通过第一接口和第二接口传输数据包的分流，以及第二终端设备中对通过第一接口和第二接口传输数据包的汇聚等操作，放在PDCP层之上进行。
图7是本申请另一实施例的通信系统中协议栈架构的示意性框图。应理解，图7仅仅示出第一终端设备、第二终端设备以及网络设备中与本申请实施例相关的协议层，第一终端设备、第二终端设备以及网络设备还可以包括其他协议层，本申请实施例对此不作具体限定。
从图7所示的协议栈架构中，第一终端设备和第二终端设备中添加了汇聚层(Convergence Layer)，在第一终端设备和第二终端设备的直连接口对应的协议栈架构中添加了适配层(Adaption Layer)，第一终端设备和第二终端设备的非直连接口对应的协议栈架构中添加了路由层(Routing Layer)，又称“第二路由层”。网络设备在非直连接口对应的协议栈架构中添加了路由层(Routing Layer)。具体地，上述第一终端设备和第二终端设备中的适配层和路由层可以位于汇聚层与PDCP层之间，汇聚层、适配层和路由层可以整体位于业务数据适配协议(Service Data Adaptation Protocol，SDAP)层和PDCP层之间，也就是说，汇聚层位于SDAP层和路由层之间。
网络设备中设置的路由层和第一终端设备中的路由层可以提供路由层的对等实体，也就是说，网络设备中的路由层可以位于网络设备的PDCP层之上，具体的可以位于网络设备的PDCP层和网络设备的SDAP层之间。
下文结合图7所示的第一接口的协议栈架构，介绍通过第一接口和第二接口传输数据包的过程。具体的数据包传输过程可以分为两种情况。为了便于说明，将第一数据包对应的协议数据单元(Protocol Data Unit，PDU)称为“第三PDU”，将第二数据包对应的PDU称为“第四PDU”。
情况一：第一数据包和第二数据包为相同的数据包。
在第一终端设备的汇聚层，对第三PDU进行复制生成第四PDU，第三PDU和第四PDU可以被配置具有相同的汇聚层序列号(Sequence Number，SN)。并将第三PDU传输至第一终端设备的适配层，将第四PDU传输至第一终端设备的路由层，其中汇聚层序列号的作用与现有技术中PDCP序列号的功能相似，例如可以指示对数据包进行汇聚的顺 序，还可以用于重复检测，重复丢弃等。
在第一终端设备的适配层，为第三PDU添加第三汇聚标识，第三汇聚标识用于指示在所述目标协议层实体对所述第一数据包进行数据汇聚，或者说第三汇聚标识用于指示对第一数据包进行汇聚的协议层实体。
在第一终端设备的路由层，为第四PDU添加第二路由头以及第四汇聚标识，所述第四PDU为所述第二数据包在所述第一终端设备的PDCP层的PDU，所述第一路由头用于指示传输所述第二数据包的路径，所述第四汇聚标识用于指示在所述目标协议层实体对所述第二数据包进行数据汇聚，或者说第四汇聚标识用于指示对第二数据包进行汇聚的协议层实体。
可选地，上述为第四PDU添加第二路由头，可以理解为以基于路由头(Routing-header)协议对第四PDU进行封装。第二路由头可以包括源信息(Source Information，Src Info)，目的信息(destination Information，Dst Info)，可选地，上述第二路由头还可以包括服务质量要求信息(Quality of Service Information，QoS Info)、时间信息(Time information，Time Info)以及测量信息(Measurement information，Measurement Info)中的至少一种，具体地的PDU封装结构可以参见图8。
具体地，上述源信息用于指示第一终端设备，具体地可以是第一终端设备的地址信息，例如互联网协议(Internet Protocol，IP)地址，媒体访问控制(Media Access Control，MAC)地址，第一终端设备的标识信息等。其中，第一终端设备的标识信息可以是国际移动用户识别码(International Mobile Subscriber Identification Number，IMSI)，或者为了保护隐私网络可能分配给终端的临时标识，或者源终端位置信息等。
目的信息用于指示第二终端设备，具体地可以是第二终端设备的地址信息、第二终端设备标识信息、第二终端设备所在的终端设备集合的地址信息或第二终端设备所在的终端设备集合标识信息。如终端设备集合对应的IP组播地址，终端设备集合对应的MAC组播地址、或者网络分配的终端设备集合的群组ID等。
QoS信息用于确定传输第四PDU的服务等级，可以通过优先级表示。
时间信息用于表示与第二数据包相关的时间信息，例如，第二数据包的产生时间，第二数据包的预期发送时间、第二数据包的最晚发送时间等。
需要说明的是，上述第一终端设备获取目的信息的过程可以是由网络设备向第一终端设备指示的，也可以是第一终端设备和第二终端设备协商获取的，本申请实施例对第一终端设备获取上述目的信息的方式不做具体限定。
之后，将携带第三汇聚标识的第三PDU，以及携带第二路由头和第四汇聚标识的第四PDU分别传输至第一终端设备的RLC层中不同的RLC实体。
需要说明的是，第三PDU和第四PDU在RLC层及RLC层之下的PDU处理过程，与现有技术中传输PDU的过程基本相同，为了简洁，在此不再赘述。
网络设备在通过第二接口接收到第二数据包后，在网络设备中的路由层，通过第四PDU携带的目的信息，确定接收第二数据包的第二终端设备，并将第二数据包转发至第二终端设备。
第二终端设备通过第一接口接收第一数据包之后，在第二终端设备的适配层，对携带第三汇聚标识的第三PDU进行解封装，根据第三汇聚标识将第三PDU传输至对第三PDU 进行汇聚的目标协议层实体，即第一汇聚实体。
第二终端设备通过第二接口接收第二数据包之后，在第二终端设备的路由层，对携带第四汇聚标识的第四PDU进行解封装，根据第四汇聚标识将第四PDU传输至对第四PDU进行汇聚的目标协议层实体，即第一汇聚实体。
第二终端设备的第一汇聚实体对第三PDU和第四PDU进行汇聚，在第一数据包和第二数据包是基于同一个数据包生成的情况下，目标汇聚层实体基于第三PDU和第四PDU携带的汇聚层序列号进行重复检测、重复丢包，可以丢弃上述第三PDU和第四PDU中的任意一个。
需要说明的是，上述情况一仅仅说明了第二数据包是基于第一数据包复制的情况，也可以是第一数据包是基于第二数据包进行复制生成的，具体地的其他传输过程与上文中描述的基本相同，为了简洁，在此不再赘述。
在本申请实施例所示的协议栈架构中，相对于前三种实施例而言，将用于对数据包进行汇聚的汇聚层从PDCP层中分离出来，有利于降低PDCP层对数据包进行处理的复杂度。
情况二，第一数据包和第二数据包为不同的数据包。
具体地，在第一终端设备的汇聚层，将同一数据流中不同的两个数据包，第一数据包和第二数据包，分别传输至第一终端设备的适配层和第一终端设备的路由层，其中第一数据包的序列号和第二数据包的序列号不同。
需要说明的是，上述情况一和情况二中传输数据包过程，仅仅是在汇聚层是否需要对待传输的第一数据包进行复制的步骤略微不同，在情况二中，汇聚层无需再执行对数据包进行复制的过程，可以直接传输待传输的第一数据包和第二数据包。其中，第一数据包在第一接口对应的协议栈中的传输过程，与第二数据包在第二接口对应的协议栈中的传输过程与上述情况一中描述的数据包在协议栈中的传输过程相同，为了简洁，在此不在赘述。
第四类协议栈，适用于上文中的通信场景二，且第一接口为第一终端设备和第二终端设备通信的直连接口，第二接口为第一终端设备与网络设备之间通信的非直连接口。其中，第一终端设备、第二终端设备以及网络设备中的协议栈架构如图5所示。
图9是本申请实施例的通信系统中协议栈架构的示意性框图。应理解，图9仅仅示出第一终端设备、第二终端设备、第一网络设备和第二网络设备中与本申请实施例相关的协议层，第一终端设备、第二终端设备、第一网络设备和第二网络设备还可以包括其他协议层，本申请实施例对此不作具体限定。
图9所示的协议栈架构与图7所示的协议栈的架构基本相同，详细的介绍可以参见上文中关于第一类协议栈的介绍，下文重点介绍与图7所示的协议栈的区别，即通过第一终端设备与第一网络设备之间的非直连接口传输第二数据包的过程。
由于第一终端设备接入第一网络设备，第二终端设备接入第二网络设备，因此在第一终端设备通过第二接口向第二终端设备传输数据包的过程中，需要通过两个网络设备进行转发，即在第一网络设备和第二网络设备上需要分别设置有路由层，用于将第二数据包转发至第二终端设备。
在第一终端设备的路由层，对第四PDU封装第二路由头的过程中，除了需要封装上文中提到的目的信息指示接收第二数据包的第二终端设备之外，还需要在第二路由头中封装第二网络设备的标识信息，具体地还可以封装第一网络设备的标识信息。换句话说，在 第一终端设备的路由层，为第四PDU添加第二路由头的过程中，需要在第二路由头中添加可路由信息，可路由信息用于指示可以为第一终端设备向第二终端设备转发第二数据包的路由设备，具体地，路由设备可以包括第一网络设备和第二网络设备。
需要说明的是，上述第一终端设备所属的第一网络设备的标识信息和第二终端设备所属的第二网络设备的标识信息，可以通过第一终端设备和第二终端设备之间的协商获取。
第六类协议栈，通过网络设备配置实现通过第一接口和第二接口传输同一数据流中的数据包。
第六类协议栈可以理解为对上述第四类协议栈架构和第五类协议栈架构进行改进，通过网络设备配置的方式替代适配层，以及路由层中添加第三汇聚标识或第四汇聚标识的功能。图10示出了本申请实施例的通信系统中协议栈的架构的示意性框图，应理解，图10仅仅示出了第一终端设备和第二终端设备中协议栈架构，由于在第六类协议栈架构中网络设备的协议栈架构同上述第四类协议栈架构和第五类协议栈架构中网络设备中的协议栈架构，为了简洁，在此不再赘述。
在图10所示的协议栈架构中，第一终端设备将从汇聚层获取的第三PDU传输至第一接口对应的RLC实体，最终通过第一接口传输至第二终端设备；将从汇聚层获取的第四PDU传输至第二接口对应的路由层，进行添加第二路由头的处理，然后将携带第二路由头的第四PDU传输至第二接口对应的RLC实体，最终通过第二接口传输至第二终端设备。
具体地，在步骤210之前，所述方法还包括：所述第一终端设备接收网络设备发送的第二配置信息，所述第二配置信息用于配置所述第一终端设备通过所述第一接口传输所述第一数据包，且通过所述第二接口传输所述第二数据包。
需要说明的是，上述第一终端设备和第二终端设备所属的网络设备相同时，上述发送第二配置信息的网络设备为第一终端设备和第二终端设备所属的网络设备；第一终端设备和第二终端设备所述的网络设备不同时，上述发送第二配置信息的网络设备为第一终端设备接入的第一网络设备。
还应理解，上述第一终端设备接入第一网络设备，第二终端设备接入第二网络设备时，第一网络设备和第二网络设备协商确定可以用于为第一终端设备向第二终端设备传输数据包的第一接口和第二接口。最终，可以由第一网络设备向第一终端设备通过第一配置信息为第一终端设备进行配置，由第二网络设备向第二终端设备通过第四配置信息进行配置，第四配置信息与第一配置信息的功能相同，可以携带相同的指示信息，具体指示信息的内容见下文详细描述。
可选地，所述第二配置信息携带下述指示信息中的至少一种：用于指示所述第一接口对应的无线承载和所述第二接口对应的无线承载相同的指示信息；用于指示通过所述第一接口传输所述第一数据包的目的地址与通过所述第二接口传输所述第二数据包的目的地址相同的指示信息；用于指示所述第一接口对应的逻辑信道和所述第二接口对应的逻辑信道相同的指示信息。
在本申请实施例中，通过网络设备配置第一接口和第二接口为第一终端设备向第二终端设备传输数据包，替代在协议栈的架构中新增适配层，有利于减小对现有协议栈的改进，减小改进协议栈所需的成本。
在上文中介绍的第一类协议栈架构至第六类协议栈架构中，都是基于第一接口为直连 接口，第二接口为非直连接口的方式介绍的，在本申请实施例中，上述第一接口和第二接口都可以为直连接口，例如第一接口为LTE制式中的直连接口，第二接口为NR制式中的直连接口。
当第一接口为LTE制式中的直连接口，第二接口为NR制式中的直连接口时，两个接口对应的协议栈架构是相同的，数据包对应的传输过程也是相同的。为了简洁，不在一一介绍，仅举出基于上述第一类协议栈架构和上述第三类协议栈架构进行变形后的协议栈架构。
图11示出了本申请实施例的基于双直连接口的协议栈架构的示意性框图，在图11所示的协议栈架构中第一接口对应的协议栈和第二接口对应的协议栈，与第一类协议栈架构中第一接口对应的协议栈的架构相同。具体的数据包传输过程可以参见第一类协议栈架构中关于通过第一接口传输数据包的过程，为了简洁在此不再赘述。
图12示出了本申请另一实施例的基于双直连接口的协议栈架构的示意性框图，在图12所示的协议栈架构中第一接口对应的协议栈和第二接口对应的协议栈，与第三类协议栈架构中第一接口对应的协议栈的架构相同。具体的数据包传输过程可以参见第一类协议栈架构中关于通过第一接口传输数据包的过程，为了简洁在此不再赘述。
需要说明的是，还可以基于图11和图12所示的协议栈的架构进行变形，例如，如第二类协议栈架构和第四类协议栈架构的描述，通过网络设备配置的方式实现通过第一接口和第二接口传输同一数据流中的数据包，以替代适配层实现的功能，从而避免新增适配层带来的对第一终端设备的协议栈以及二终端设备的协议栈的改进。
可选地，作为一个实施例，在步骤210之前，所述方法还包括：230，配置过程，即网络设备为第一终端设备配置通过多接口传输所述第一数据包和所述第二数据包。
具体地，所述第一终端设备接收所述网络设备发送的多接口传输指示信息，所述多接口传输指示信息用于指示所述第一终端设备通过两个接口向所述第二终端设备传输所述第一数据包和第二数据包，和/或所述多接口传输指示信息还用于指示所述第一数据包和所述第二数据包中携带的数据是否相同。
相应地，第二终端设备通过多接口接收第一终端设备传输的第一数据包和第二数据包的功能，也可以由第二终端设备基于通信协议规定好的，也可以是网络设备为第二终端设备进行配置的，具体的配置方式参见网络设备为第一终端设备配置的配置过程。
应理解，上述步骤230所示的配置过程可以与上文中网络设备向第一终端设备发送第一配置信息，通过一次信令交互实现，例如，网络设备可以直接向第一终端设备发送第一配置信息，同时实现上述配置过程，并配置第一终端设备通过第一接口和第二接口向第二终端设备传输第一数据包和第二数据包。上述步骤230所示的配置过程也可以与上文中网络设备向第一终端设备发送第一配置信息，通过两次信令交互的方式实现，本申请实施例对此不作具体限定。
需要说明的是，上述第一终端设备向第二终端设备传输数据包的具体传输方式可以由网络设备为第一终端设备配置，还可以是通过通信协议规定好的，本申请实施例对此不做具体限定。
还应理解，上述所述第一终端设备通过两个接口向所述第二终端设备传输所述第一数据包和第二数据包的传输方式，可以是通过通信协议规定好的，而上述指示待传输的第一 数据包和第二数据包中携带的数据是否相同的传输方式可以由网络设备为第一终端设备配置。或者上述所述第一终端设备通过两个接口向所述第二终端设备传输所述第一数据包和第二数据包的传输方式，可以由网络设备为第一终端设备配置，而上述指示待传输的第一数据包和第二数据包中携带的数据是否相同的传输方式可以是通过通信协议规定好的。
可选地，作为一个实施例，所述第一终端设备接收所述网络设备发送的多接口传输指示信息之前，所述方法还包括：所述第一终端设备向所述网络设备发送多接口传输请求，所述多接口传输请求用于向网络设备请求通过多接口向所述第二终端设备传输所述第一数据包和所述第二数据包。
也就是说，可以通过第一终端设备向网络设备请求的方式，由网络设备为第一终端配置通过多接口传输第一数据包和第二数据包。
可选地，上述多接口传输请求携带第一信道的测量报告和/或第一信道的Qos参数，其中所述第一信道用于第一终端设备与第二终端设备之间直接传输数据包，或者说，可以是上述直连接口对应的信道，例如，直连接口对应的副链路(sidelink，SL)。
可选地，所述第一终端设备接收网络设备发送的多接口传输指示信息，包括：所述第一终端设备接收所述网络设备发送的系统信息块(System Information Block，SIB)，所述SIB携带所述多接口传输指示信息；或所述第一终端设备接收所述网络设备发送的专用信令，所述专用信令携带所述多接口传输指示信息。
可选地，作为一个实施例，在步骤210之前，所述方法还包括：240，激活过程，该激活过程用于为第一终端设备激活通过第一接口传输第一数据包，通过第二接口传输第二数据包的传输方式。具体地，上述激活方式可以有两种方式。
第一种激活方式：由网络设备为第一终端设备激活。
具体地，第一终端设备和第二终端设备接入相同的网络设备时，第一终端设备接收所述网络设备发送的第一激活指示信息，所述第一激活指示信息用于指示所述第一终端设备激活通过多接口向第二终端设备传输数据包。第二终端设备接收所述网络设备发送的第二激活指示信息，所述第二激活指示信息用于指示所述第一终端设备激活通过多接口向第二终端设备传输数据包。
第一终端设备接入第一网络设备，第二终端设备接入第二网络设备时，第一终端设备接收第一网络设备发送的第一激活指示信息，所述第一激活指示信息用于指示所述第一终端设备激活通过多接口向第二终端设备传输数据包。第二终端设备接收第二网络设备发送的第二激活指示信息，所述第二激活指示信息用于指示所述第一终端设备激活通过多接口向第二终端设备传输数据包。
需要说明的是，上述第一网络设备和第二网络设备之间可以通过协商的方式，确定是否激活第一终端设备和第二终端设备之间通过多接口向第二终端设备传输数据包的功能。
还应理，上述第一终端设备激活通过多接口向第二终端设备传输数据包，可以是同一数据流中的数据包，即包括上述第一数据包和第二数据包。
第二种激活方式：由第一终端设备和第二终端设备协商激活。
具体地，第一终端设备向第二终端设备发送激活请求，所述激活请求用于请求第二终端设备通过多接口与第一终端设备传输数据包；所述第一终端设备接收所述第二终端设备发送的响应消息，所述响应消息用于指示所述第二终端设备是否同意通过多接口与第一终 端设备传输数据包。
需要说明的是，上述第二种激活方式可以用于第一终端设备和第二终端设备属于同一网络设备的场景，还可以适用第一终端设备和第二终端设备属于不同网络设备的情况。
第三种激活方式：由第一终端设备向第二终端设备转发第一网络设备发送的第一激活指示信息。
具体地，第一终端设备接收第一网络设备发送的第一激活指示信息，所述第一激活指示信息用于指示所述第一终端设备激活通过多接口向第二终端设备传输数据包；所述第一终端设备向所述第二终端设备转发所述第一激活指示信息。
需要说明的是，上述第三种激活方式可以用于第一终端设备和第二终端设备属于同一网络设备的场景，还可以适用第一终端设备和第二终端设备属于不同网络设备的情况。
下文从网络设备向终端设备传输信令的角度介绍本申请实施例。应理解，本申请实施例介绍的方法中的信令的功能，以及信令中携带的内容可以参见上文的介绍，为了简洁，在此不作具体介绍。本申请另一实施例还提供一种通信方法，该方法包括：网络设备向第一终端设备发送多接口传输指示信息，所述多接口传输指示信息用于指示所述第一终端设备通过多接口向所述第二终端设备传输所述第一数据包和第二数据包，和/或所述多接口传输指示信息还用于指示所述第一数据包和所述第二数据包中携带的数据是否相同。
可选地，所述第一数据包和所述第二数据包为同一数据流中的相同数据包。
可选地，所述第一数据包和所述第二数据包为同一数据流中的不同数据包。
可选地，作为一个实施例，在所述网络设备向第一终端设备发送多接口传输指示信息之前，所述方法还包括：所述网络设备接收所述第一终端设备发送的多接口传输请求，所述多接口传输请求用于向所述网络设备请求通过多接口向所述第二终端设备传输所述第一数据包和所述第二数据包。
可选地，作为一个实施例，所述网络设备接收所述第一终端设备发送的多接口传输请求，包括：所述网络设备接收所述第一终端设备发送的系统信息块SIB，所述SIB携带所述多接口传输指示信息；或所述网络设备接收所述第一终端设备发送的专用信令，所述专用信令携带所述多接口传输指示信息。
可选地，作为一个实施例，所述多接口包括第一接口和第二接口，所述方法还包括：所述网络设备向所述第一终端设备发送的第一配置信息，所述第一配置信息用于配置所述第一终端设备通过所述第一接口传输所述第一数据包，且通过所第二接口传输所述第二数据包。
可选地，作为一个实施例，所述第一配置信息携带下述指示信息中的至少一种：用于指示所述第一接口对应的无线承载和所述第二接口对应的无线承载相同的指示信息；用于指示通过所述第一接口传输所述第一数据包的目的地址与通过所述第二接口传输所述第二数据包的目的地址相同的指示信息；以及用于指示所述第一接口对应的逻辑信道和所述第二接口对应的逻辑信道相同的指示信息。
上文结合图1至图13详细的描述了本申请实施例的通信方法，下面结合图14至图16，详细描述本申请实施例的装置。应理解，图14至图16所示的装置能够实现图2中的各个步骤，因此，其具体细节可以参照上述实施例中的描述，为避免重复，在此不再详细赘述。
图13是本申请实施例的第一终端设备的示意性框图，图13所示的第一终端设备1300包括发送模块1310和第一接收模块1320。
发送模块，用于通过第一接口向第二终端设备传输第一数据包，所述第一接口为长期演进LTE制式中所述第一终端设备和所述第二终端设备直接通信的通信接口，或新无线NR制式中所述第一终端设备和所述第二终端设备直接通信的通信接口；
所述发送模块，还用于通过第二接口向所述第二终端设备传输第二数据包，所述第二接口为下列接口中的任意一种：所述第一终端设备与LTE网络设备通信的通信接口，所述第一终端设备与NR网络设备通信的通信接口，LTE制式中所述第一终端设备和所述第二终端设备直接通信的通信接口，NR制式中所述第一终端设备和所述第二终端设备直接通信的通信接口，LTE制式中所述第一终端设备和中继终端设备直接通信的通信接口，以及NR制式中所述第一终端设备和所述中继终端设备直接通信的通信接口。
可选地，作为一个实施例，所述第一数据包和所述第二数据包为同一数据流中的相同数据包。
可选地，作为一个实施例，所述第一数据包和所述第二数据包为同一数据流中的不同数据包。
可选地，作为一个实施例，所述第一数据包和所述第二数据包被所述第二终端设备中的同一目标协议层实体汇聚。
可选地，作为一个实施例，所述第一终端设备设置有第一路由层，所述第一路由层位于所述第一终端设备的分组数据汇聚协议PDCP层和所述第一终端设备的无线链路层控制协议RLC层之间，所述第一终端设备还包括：所述第一路由层的路由实体，用于为第二协议数据单元PDU添加第一路由头，所述第二PDU为所述第二数据包在所述第一终端设备的PDCP层的PDU，所述第一路由头用于指示传输所述第二数据包的路径。
可选地，作为一个实施例，所述第一终端设备设置有第一适配层，所述第一适配层位于所述第一终端设备的PDCP层和所述第一终端设备的RLC层之间，所述第一终端设备还包括：所述第一适配层的适配实体，用于为第一PDU添加第一汇聚标识，所述第一PDU为所述第一数据包在所述第一终端设备的PDCP层的PDU，第一汇聚标识用于指示在所述目标协议层实体对所述第一数据包进行数据汇聚。
可选地，作为一个实施例，在所述通过第一接口向第二终端设备传输第一数据包之前，所述第一终端设备还包括：第一接收模块，还用于接收网络设备发送的第一配置信息，所述第一配置信息用于配置所述第一终端设备通过所述第一接口传输所述第一数据包，且通过所述第二接口传输所述第二数据包。
可选地，作为一个实施例，所述第一配置信息携带下述指示信息中的至少一种：用于指示所述第一接口对应的无线承载和所述第二接口对应的无线承载相同的指示信息；用于指示通过所述第一接口传输所述第一数据包的目的地址与通过所述第二接口传输所述第二数据包的目的地址相同的指示信息；用于指示所述第一接口对应的逻辑信道和所述第二接口对应的逻辑信道相同的指示信息。
可选地，作为一个实施例，所述第一终端设置有第一汇聚层和第二路由层，所述第一终端设备还包括：所述第二路由层的路由实体，用于从所述第一汇聚层获取第三PDU，所述第三PDU为所述第二数据包在所述第一汇聚层的PDU；所述第二路由层的路由实体， 还用于为所述第三PDU添加第二路由头，所述第三PDU为所述第二数据包在所述第一汇聚层的PDU，所述第二路由头用于指示传输所述第二数据包的路径；所述第二路由层的路由实体，还用于将携带所述第二路由头的所述第三PDU传输至所述第一终端的PDCP层。
可选地，作为一个实施例，所述第一终端设置有第二适配层，所述第一终端设备还包括：所述第二适配层的适配实体，用于从所述第一汇聚层获取第四PDU，所述第四PDU为所述第一数据包在所述第一汇聚层的PDU；所述第二适配层的适配实体，还用于为所述第四PDU添加第三汇聚标识，所述第三汇聚标识用于指示所述第一数据包所属的数据流；所述第二适配层的适配实体，还用于将携带所述第二汇聚标识的所述第四PDU传输至所述第一终端的PDCP层。
可选地，作为一个实施例，所述第一终端设备还包括：第二接收模块，用于接收网络设备发送的第二配置信息，所述第二配置信息用于配置所述第一终端设备通过所述第一接口传输所述第一数据包，且通过所述第二接口传输所述第二数据包。
可选地，作为一个实施例，所述第二配置信息携带下述指示信息中的至少一种：用于指示所述第一接口对应的无线承载和所述第二接口对应的无线承载相同的指示信息；用于指示通过所述第一接口传输所述第一数据包的目的地址与通过所述第二接口传输所述第二数据包的目的地址相同的指示信息；用于指示所述第一接口对应的逻辑信道和所述第二接口对应的逻辑信道相同的指示信息。
可选地，作为一个实施例，所述第一终端设备还包括：第三接收模块，还用于接收网络设备发送的多接口传输指示信息，所述多接口传输指示信息用于指示所述第一终端设备通过两个接口向所述第二终端设备传输所述第一数据包和第二数据包，和/或所述多接口传输指示信息还用于指示所述第一数据包和所述第二数据包中携带的数据是否相同。
可选地，作为一个实施例，所述发送模块，还用于向所述网络设备发送多接口传输请求，所述多接口传输请求用于向网络设备请求通过多接口向所述第二终端设备传输所述第一数据包和所述第二数据包。
可选地，作为一个实施例，所述第三接收模块具体用于：接收所述网络设备发送的系统信息块SIB，所述SIB携带所述多接口传输指示信息；或接收所述网络设备发送的专用信令，所述专用信令携带所述多接口传输指示信息。
在可选的实施例中，上述发送模块1310和第一接收模块1320可以为收发机1440，上述协议层实体可以为处理器1420，其中协议层实体可以是路由实体、适配实体和第一汇聚实体等。上述第一终端设备中的协议层可以是存储在所述第一终端设备的存储器1410中的程序模块，上述协议层包括第一路由层、第二路由层、第一适配层、第二适配层和第一汇聚层等。所述第一终端设备还可以包括输入/输出接口1430，具体如图14所示。
图14是本申请另一实施例的第一终端设备的示意性框图。图14所示的第一终端设备1400可以包括：存储器1410、处理器1420、输入/输出接口1430、收发机1440。其中，存储器1410、处理器1420、输入/输出接口1430和收发机1440通过内部连接通路相连，该存储器1410用于存储指令，该处理器1420用于执行该存储器1420存储的指令，以控制输入/输出接口1430接收输入的数据和信息，输出操作结果等数据，并控制收发机1440发送信号。
所述收发机1440，用于通过第一接口向第二终端设备传输第一数据包，所述第一接口为长期演进LTE制式中所述第一终端设备和所述第二终端设备直接通信的通信接口，或新无线NR制式中所述第一终端设备和所述第二终端设备直接通信的通信接口；
通过第二接口向所述第二终端设备传输第二数据包，所述第二接口为下列接口中的任意一种：所述第一终端设备与LTE网络设备通信的通信接口，所述第一终端设备与NR网络设备通信的通信接口，LTE制式中所述第一终端设备和所述第二终端设备直接通信的通信接口，NR制式中所述第一终端设备和所述第二终端设备直接通信的通信接口，LTE制式中所述第一终端设备和中继终端设备直接通信的通信接口，以及NR制式中所述第一终端设备和所述中继终端设备直接通信的通信接口。
应理解，在本申请实施例中，该处理器1420可以采用通用的中央处理器(Central Processing Unit，CPU)，微处理器，应用专用集成电路(Application Specific Integrated Circuit，ASIC)，或者一个或多个集成电路，用于执行相关程序，以实现本申请实施例所提供的技术方案。
还应理解，收发机1440又称通信接口，使用例如但不限于收发器一类的收发装置，来实现终端1400与其他设备或通信网络之间的通信。
该存储器1410可以包括只读存储器和随机存取存储器，并向处理器1420提供指令和数据。处理器1420的一部分还可以包括非易失性随机存取存储器。例如，处理器1420还可以存储设备类型的信息。
在实现过程中，上述方法的各步骤可以通过处理器1420中的硬件的集成逻辑电路或者软件形式的指令完成。结合本申请实施例所公开的通信方法可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器1410，处理器1420读取存储器1414中的信息，结合其硬件完成上述方法的步骤。为避免重复，这里不再详细描述。
应理解，本申请实施例中，该处理器可以为中央处理单元(central processing unit，CPU)，该处理器还可以是其他通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
图15是本申请实施例的第二终端设备的示意性框图。图15所示的第二终端设备1500包括：第一接收模块1510和第二接收模块1520。
第一接收模块，用于通过第一接口接收第一终端设备发送的第一数据包，所述第一接口为长期演进LTE制式中所述第一终端设备和所述第二终端设备直接通信的通信接口，或新无线NR制式中所述第一终端设备和所述第二终端设备直接通信的通信接口；
所述第一接收模块，还用于通过第二接口接收所述第一终端设备发送的第二数据包，所述第二接口为下列接口中的任意一种：所述第一终端设备与LTE网络设备通信的通信接口，所述第一终端设备与NR网络设备通信的通信接口，LTE制式中所述第一终端设备和第二终端设备直接通信的通信接口，NR制式中所述第一终端设备和所述第二终端设备 直接通信的通信接口，LTE制式中所述第一终端设备和中继终端设备直接通信的通信接口，以及NR制式中所述第一终端设备和所述中继终端设备直接通信的通信接口。
可选地，作为一个实施例，所述第一数据包和所述第二数据包为同一数据流中的相同数据包。
可选地，作为一个实施例，所述第一数据包和所述第二数据包为同一数据流中的不同数据包。
可选地，作为一个实施例，所述第一数据包和所述第二数据包被所述第二终端设备中的同一目标协议层实体汇聚。
可选地，作为一个实施例，所述目标协议层实体为分组数据汇聚协议PDCP实体，所述第二终端设备设置有第一路由层，所述第一路由层位于所述第二终端设备的PDCP层和所述第二终端设备的无线链路层控制协议RLC层之间，所述第二终端设备还包括：所述第一路由层的路由层实体，用于对携带第一路由头的第二协议数据单元PDU进行解封装，并将所述第二PDU传输至所述PDCP实体，所述第二PDU为所述第二数据包在所述第一终端设备的PDCP层的PDU，所述第一路由头用于指示传输所述第二数据包的路径。
可选地，作为一个实施例，所述第二终端设备设置有第一适配层，所述第一适配层位于所述第二终端设备的PDCP层和所述第二终端设备的RLC层之间，所述第二终端设备还包括：所述第一适配层的适配实体，用于根据第一PDU携带的第一汇聚标识，将所述第一PDU传输至所述PDCP实体，所述第一PDU为所述第一数据包在所述第一终端设备的PDCP层的PDU，第一汇聚标识用于指示在所述目标协议层实体对所述第一数据包进行汇聚。
可选地，作为一个实施例，在所述第二终端设备通过第一接口接收第一终端设备发送的第一数据包之前，所述第二终端设备还包括：第二接收模块，用于接收网络设备发送的第一配置信息，所述第一配置信息用于配置所述第一终端设备通过所述第一接口传输所述第一数据包，且通过所述第二接口传输所述第二数据包。
可选地，作为一个实施例，所述第一配置信息携带下述指示信息中的至少一种：用于指示所述第一接口对应的无线承载和所述第二接口对应的无线承载相同的指示信息；用于指示通过所述第一接口传输所述第一数据包的目的地址与通过所述第二接口传输所述第二数据包的目的地址相同的指示信息；用于指示所述第一接口对应的逻辑信道和所述第二接口对应的逻辑信道相同的指示信息。
可选地，作为一个实施例，所述第二终端设备设置有第一汇聚层和第二路由层，所述目标协议层实体为所述第一汇聚层的第一汇聚实体，所述第二路由层的路由实体，用于从所述第二终端设备的PDCP层获取第三PDU，所述第三PDU为所述第二数据包在所述第一终端设备的PDCP层的PDU；所述第二路由层的路由实体，还用于对携带第二路由头的第三PDU进行解封装，并将所述第三PDU传输至所述第一汇聚实体，所述第二路由头用于指示传输所述第二数据包的路径；所述第一汇聚实体，用于对所述第二数据包进行汇聚。
可选地，作为一个实施例，所述第二终端设备设置有第二适配层，所述第二终端设备包括：所述第二适配层的适配实体，用于从所述第二终端设备的PDCP层获取第四PDU，所述第四PDU为所述第一数据包在所述第一终端设备的PDCP层的PDU；所述第二适配 层的适配实体，用于根据所述第四PDU携带的第三汇聚标识，将所述第四PDU传输至所述第一汇聚实体，第三汇聚标识用于指示所述第一数据包所属的数据流；所述第一汇聚实体，用于对所述第一数据包进行数据汇聚。
可选地，作为一个实施例，所述第二终端设备还包括：第三接收模块，用于接收网络设备发送的第二配置信息，所述第二配置信息用于配置所述第一终端设备通过所述第一接口传输所述第一数据包，且通过所述第二接口传输所述第二数据包。
可选地，作为一个实施例，所述第二配置信息携带下述指示信息中的至少一种：用于指示所述第一接口对应的无线承载和所述第二接口对应的无线承载相同的指示信息；用于指示通过所述第一接口传输所述第一数据包的目的地址与通过所述第二接口传输所述第二数据包的目的地址相同的指示信息；用于指示所述第一接口对应的逻辑信道和所述第二接口对应的逻辑信道相同的指示信息。
在可选的实施例中，上述第一接收模块1510和第二接收模块1520可以为收发机1640，上述协议层实体可以为处理器1620，其中协议层实体可以是路由实体、适配实体和第一汇聚实体等。上述第二终端设备中的协议层可以是存储在所述第二终端设备的存储器1610中的程序模块，上述协议层包括第一路由层、第二路由层、第一适配层、第二适配层和第一汇聚层等。所述第二终端设备还可以包括输入/输出接口1630，具体如图16所示。
图16是本申请另一实施例的第二终端设备的示意性框图。图16所示的第二终端设备1600可以包括：存储器1610、处理器1620、输入/输出接口1630、收发机1640。其中，存储器1610、处理器1620、输入/输出接口1630和收发机1640通过内部连接通路相连，该存储器1610用于存储指令，该处理器1620用于执行该存储器1620存储的指令，以控制输入/输出接口1630接收输入的数据和信息，输出操作结果等数据，并控制收发机1640发送信号。
所述收发机1640，用于通过第一接口接收第一终端设备传输的第一数据包，所述第一接口为长期演进LTE制式中所述第一终端设备和所述第二终端设备直接通信的通信接口，或新无线NR制式中所述第一终端设备和所述第二终端设备直接通信的通信接口；
通过第二接口接收所述第一终端设备传输的第二数据包，所述第二接口为下列接口中的任意一种：所述第一终端设备与LTE网络设备通信的通信接口，所述第一终端设备与NR网络设备通信的通信接口，LTE制式中所述第一终端设备和第二终端设备直接通信的通信接口，NR制式中所述第一终端设备和所述第二终端设备直接通信的通信接口，LTE制式中所述第一终端设备和中继终端设备直接通信的通信接口，以及NR制式中所述第一终端设备和所述中继终端设备直接通信的通信接口。
应理解，在本申请实施例中，该处理器1620可以采用通用的中央处理器(Central Processing Unit，CPU)，微处理器，应用专用集成电路(Application Specific Integrated Circuit，ASIC)，或者一个或多个集成电路，用于执行相关程序，以实现本申请实施例所提供的技术方案。
还应理解，收发机1640又称通信接口，使用例如但不限于收发器一类的收发装置，来实现终端1600与其他设备或通信网络之间的通信。
该存储器1610可以包括只读存储器和随机存取存储器，并向处理器1620提供指令和数据。处理器1620的一部分还可以包括非易失性随机存取存储器。例如，处理器1620还 可以存储设备类型的信息。
在实现过程中，上述方法的各步骤可以通过处理器1620中的硬件的集成逻辑电路或者软件形式的指令完成。结合本申请实施例所公开的通信方法可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器1610，处理器1620读取存储器1616中的信息，结合其硬件完成上述方法的步骤。为避免重复，这里不再详细描述。
应理解，本申请实施例中，该处理器可以为中央处理单元(central processing unit，CPU)，该处理器还可以是其他通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
应理解，在本申请实施例中，“与A相应的B”表示B与A相关联，根据A可以确定B。但还应理解，根据A确定B并不意味着仅仅根据A确定B，还可以根据A和/或其它信息确定B。
应理解，本文中术语“和/或”，仅仅是一种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。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算 机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(Digital Subscriber Line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够读取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，数字通用光盘(Digital Video Disc，DVD))或者半导体介质(例如，固态硬盘(Solid State Disk，SSD))等。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (30)

  1. 一种通信方法，其特征在于，包括：
    第一终端设备通过第一接口向第二终端设备传输第一数据包，所述第一接口为长期演进LTE制式中所述第一终端设备和所述第二终端设备直接通信的通信接口，或新无线NR制式中所述第一终端设备和所述第二终端设备直接通信的通信接口；
    所述第一终端设备通过第二接口向所述第二终端设备传输第二数据包，所述第二接口为下列接口中的任意一种：所述第一终端设备与LTE网络设备通信的通信接口，所述第一终端设备与NR网络设备通信的通信接口，LTE制式中所述第一终端设备和所述第二终端设备直接通信的通信接口，NR制式中所述第一终端设备和所述第二终端设备直接通信的通信接口，LTE制式中所述第一终端设备和中继终端设备直接通信的通信接口，以及NR制式中所述第一终端设备和所述中继终端设备直接通信的通信接口。
  2. 如权利要求1所述的方法，其特征在于，所述第一数据包和所述第二数据包为同一数据流中的相同数据包。
  3. 如权利要求1所述的方法，其特征在于，所述第一数据包和所述第二数据包为同一数据流中的不同数据包。
  4. 如权利要求1-3中任一项所述的方法，其特征在于，所述第一数据包和所述第二数据包被所述第二终端设备中的同一目标协议层实体汇聚。
  5. 如权利要求1-4中任一项所述的方法，其特征在于，所述第一终端设备设置有第一路由层，所述第一路由层位于所述第一终端设备的分组数据汇聚协议PDCP层和所述第一终端设备的无线链路层控制协议RLC层之间，
    在所述第一终端设备通过第二接口向所述第二终端设备传输第二数据包之前，所述方法还包括：
    所述第一终端设备在所述第一路由层，为第二协议数据单元PDU添加第一路由头，所述第二PDU为所述第二数据包在所述第一终端设备的PDCP层的PDU，所述第一路由头用于指示传输所述第二数据包的路径。
  6. 如权利要求5所述的方法，其特征在于，所述第一终端设备设置有第一适配层，所述第一适配层位于所述第一终端设备的PDCP层和所述第一终端设备的RLC层之间，
    在所述第一终端设备通过第一接口向第二终端设备传输第一数据包之前，所述方法还包括：
    所述第一终端设备在所述第一适配层，为第一PDU添加第一汇聚标识，所述第一PDU为所述第一数据包在所述第一终端设备的PDCP层的PDU，第一汇聚标识用于指示在所述目标协议层实体对所述第一数据包进行数据汇聚。
  7. 如权利要求1-5中任一项所述的方法，其特征在于，在所述通过第一接口向第二终端设备传输第一数据包之前，所述方法还包括：
    所述第一终端设备接收网络设备发送的第一配置信息，所述第一配置信息用于配置所述第一终端设备通过所述第一接口传输所述第一数据包，且通过所述第二接口传输所述第二数据包。
  8. 如权利要求7所述的方法，其特征在于，所述第一配置信息携带下述指示信息中的至少一种：
    用于指示所述第一接口对应的无线承载和所述第二接口对应的无线承载相同的指示信息；
    用于指示通过所述第一接口传输所述第一数据包的目的地址与通过所述第二接口传输所述第二数据包的目的地址相同的指示信息；
    用于指示所述第一接口对应的逻辑信道和所述第二接口对应的逻辑信道相同的指示信息。
  9. 如权利要求1-4中任一项所述的方法，其特征在于，所述第一终端设置有第一汇聚层和第二路由层，
    在所述第一终端设备通过第二接口向所述第二终端传输第二数据包之前，所述方法还包括：
    所述第一终端设备从所述第一汇聚层获取第三PDU，所述第三PDU为所述第二数据包在所述第一汇聚层的PDU；
    所述第一终端设备在所述第二路由层，为所述第三PDU添加第二路由头，所述第三PDU为所述第二数据包在所述第一汇聚层的PDU，所述第二路由头用于指示传输所述第二数据包的路径；
    所述第一终端设备将携带所述第二路由头的所述第三PDU传输至所述第一终端的PDCP层。
  10. 如权利要求9所述的方法，其特征在于，所述第一终端设置有第二适配层，
    在所述第一终端设备通过第一接口向第二终端传输第一数据包之前，所述方法还包括：
    所述第一终端设备从所述第一汇聚层获取第四PDU，所述第四PDU为所述第一数据包在所述第一汇聚层的PDU；
    所述第一终端设备在所述第二适配层，为所述第四PDU添加第三汇聚标识，所述第三汇聚标识用于指示所述第一数据包所属的数据流；
    所述第一终端设备将携带所述第二汇聚标识的所述第四PDU传输至所述第一终端的PDCP层。
  11. 如权利要求9所述的方法，其特征在于，在所述通过第一接口向第二终端传输第一数据包之前，所述方法还包括：
    所述第一终端设备接收网络设备发送的第二配置信息，所述第二配置信息用于配置所述第一终端设备通过所述第一接口传输所述第一数据包，且通过所述第二接口传输所述第二数据包。
  12. 如权利要求11所述的方法，其特征在于，所述第二配置信息携带下述指示信息中的至少一种：
    用于指示所述第一接口对应的无线承载和所述第二接口对应的无线承载相同的指示信息；
    用于指示通过所述第一接口传输所述第一数据包的目的地址与通过所述第二接口传输所述第二数据包的目的地址相同的指示信息；
    用于指示所述第一接口对应的逻辑信道和所述第二接口对应的逻辑信道相同的指示信息。
  13. 如权利要求1-12中任一项所述的方法，其特征在于，在所述第一终端设备通过第一接口向第二终端设备传输第一数据包之前，所述方法还包括：
    所述第一终端设备接收所述网络设备发送的多接口传输指示信息，所述多接口传输指示信息用于指示所述第一终端设备通过两个接口向所述第二终端设备传输所述第一数据包和第二数据包，和/或
    所述多接口传输指示信息还用于指示所述第一数据包和所述第二数据包中携带的数据是否相同。
  14. 如权利要求13所述的方法，其特征在于，在所述第一终端设备接收所述网络设备发送的多接口传输指示信息之前，所述方法还包括：
    所述第一终端设备向所述网络设备发送多接口传输请求，所述多接口传输请求用于向网络设备请求通过多接口向所述第二终端设备传输所述第一数据包和所述第二数据包。
  15. 如权利要求13所述的方法，其特征在于，所述第一终端设备接收网络设备发送的多接口传输指示信息，包括：
    所述第一终端设备接收所述网络设备发送的系统信息块SIB，所述SIB携带所述多接口传输指示信息；或
    所述第一终端设备接收所述网络设备发送的专用信令，所述专用信令携带所述多接口传输指示信息。
  16. 一种通信方法，其特征在于，包括：
    第二终端设备通过第一接口接收第一终端设备发送的第一数据包，所述第一接口为长期演进LTE制式中所述第一终端设备和所述第二终端设备直接通信的通信接口，或新无线NR制式中所述第一终端设备和所述第二终端设备直接通信的通信接口；
    所述第二终端设备通过第二接口接收所述第一终端设备发送的第二数据包，所述第二接口为下列接口中的任意一种：所述第一终端设备与LTE网络设备通信的通信接口，所述第一终端设备与NR网络设备通信的通信接口，LTE制式中所述第一终端设备和所述第二终端设备直接通信的通信接口，NR制式中所述第一终端设备和所述第二终端设备直接通信的通信接口，LTE制式中所述第一终端设备和中继终端设备直接通信的通信接口，以及NR制式中所述第一终端设备和所述中继终端设备直接通信的通信接口。
  17. 如权利要求16所述的方法，其特征在于，所述第一数据包和所述第二数据包为同一数据流中的相同数据包。
  18. 如权利要求16或17所述的方法，其特征在于，所述第一数据包和所述第二数据包为同一数据流中的不同数据包。
  19. 如权利要求16-18中任一项所述的方法，其特征在于，所述第一数据包和所述第二数据包被所述第二终端设备中的同一目标协议层实体汇聚。
  20. 如权利要求19所述的方法，其特征在于，所述目标协议层实体为分组数据汇聚协议PDCP实体，所述第二终端设备设置有第一路由层，所述第一路由层位于所述第二终端设备的PDCP层和所述第二终端设备的无线链路层控制协议RLC层之间，
    所述第二终端设备通过第二接口接收所述第一终端设备传输第二数据包，包括：
    所述第二终端设备在所述第一路由层，对携带第一路由头的第二协议数据单元PDU进行解封装，并将所述第二PDU传输至所述PDCP实体，所述第二PDU为所述第二数据包在所述第一终端设备的PDCP层的PDU，所述第一路由头用于指示传输所述第二数据包的路径。
  21. 如权利要求20所述的方法，其特征在于，所述第二终端设备设置有第一适配层，所述第一适配层位于所述第二终端设备的PDCP层和所述第二终端设备的RLC层之间，
    所述第二终端设备通过第一接口接收第一终端设备发送的第一数据包，包括：
    所述第二终端设备在所述第一适配层，根据第一PDU携带的第一汇聚标识，将所述第一PDU传输至所述PDCP实体，所述第一PDU为所述第一数据包在所述第一终端设备的PDCP层的PDU，第一汇聚标识用于指示在所述目标协议层实体对所述第一数据包进行汇聚。
  22. 如权利要求16-20中任一项所述的方法，其特征在于，在所述第二终端设备通过第一接口接收第一终端设备发送的第一数据包之前，所述方法还包括：
    所述第二终端设备接收网络设备发送的第一配置信息，所述第一配置信息用于配置所述第一终端设备通过所述第一接口传输所述第一数据包，且通过所述第二接口传输所述第二数据包。
  23. 如权利要求19所述的方法，其特征在于，所述第二终端设备设置有第一汇聚层和第二路由层，所述目标协议层实体为所述第一汇聚层的第一汇聚实体，
    所述第二终端设备通过第二接口接收所述第一终端设备传输第二数据包，包括：
    所述第二终端设备从所述第二终端设备的PDCP层获取第三PDU，所述第三PDU为所述第二数据包在所述第一终端设备的PDCP层的PDU；
    所述第二终端设备在所述第二路由层，对携带第二路由头的第三PDU进行解封装，并将所述第三PDU传输至所述第一汇聚实体，所述第二路由头用于指示传输所述第二数据包的路径；
    所述第二终端设备在所述第一汇聚层，通过所述第一汇聚实体对所述第二数据包进行汇聚。
  24. 如权利要求23所述的方法，其特征在于，所述第二终端设备设置有第二适配层，
    所述第二终端设备通过第一接口接收第一终端设备发送的第一数据包，包括：
    所述第二终端设备从所述第二终端设备的PDCP层获取第四PDU，所述第四PDU为所述第一数据包在所述第一终端设备的PDCP层的PDU；
    所述第二终端设备在所述第二适配层，根据所述第四PDU携带的第三汇聚标识，将所述第四PDU传输至所述第一汇聚实体，第三汇聚标识用于指示所述第一数据包所属的数据流；
    所述第二终端设备在所述第一汇聚层，通过所述第一汇聚实体对所述第一数据包进行数据汇聚。
  25. 如权利要求23所述的方法，其特征在于，在所述通过第一接口接收第一终端设备传输第一数据包之前，所述方法还包括：
    所述第二终端设备接收网络设备发送的第二配置信息，所述第二配置信息用于配置所述第一终端设备通过所述第一接口传输所述第一数据包，且通过所述第二接口传输所述第 二数据包。
  26. 一种第一终端设备，其特征在于，包括用于执行如权利要求1-15中任一项所述方法的各个模块。
  27. 一种第二终端设备，其特征在于，包括用于执行如权利要求16-25中任一项所述方法的各个模块。
  28. 一种通信设备，其特征在于，所述通信设备包括：至少一个处理器和通信接口，所述通信接口用于所述通信设备与其他通信设备进行信息交互，当程序指令在所述至少一个处理器中执行时，使得所述通信设备实现如权利要求1-25中任一所述的方法中在第一终端设备或第二终端设备上的功能。
  29. 一种计算机程序存储介质，其特征在于，所述计算机程序存储介质具有程序指令，当所述程序指令被直接或者间接执行时，使得如权利要求1-25中任一所述的方法中在第一终端设备或第二终端设备上的功能得以实现。
  30. 一种芯片系统，其特征在于，所述芯片系统包括至少一个处理器，当程序指令在所述至少一个处理器中执行时，使得如权利要求1-25中任一所述的方法中在第一终端设备或第二终端设备上的功能得以实现。
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