WO2019219034A1 - 一种通信方法及装置 - Google Patents

一种通信方法及装置 Download PDF

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Publication number
WO2019219034A1
WO2019219034A1 PCT/CN2019/087099 CN2019087099W WO2019219034A1 WO 2019219034 A1 WO2019219034 A1 WO 2019219034A1 CN 2019087099 W CN2019087099 W CN 2019087099W WO 2019219034 A1 WO2019219034 A1 WO 2019219034A1
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Prior art keywords
terminal device
channel
data packet
layer
wireless network
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PCT/CN2019/087099
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English (en)
French (fr)
Inventor
罗海燕
戴明增
彭文杰
吴义镇
王君
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华为技术有限公司
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Priority to EP19802858.1A priority Critical patent/EP3796610A4/en
Priority to AU2019271824A priority patent/AU2019271824B2/en
Publication of WO2019219034A1 publication Critical patent/WO2019219034A1/zh
Priority to US17/098,841 priority patent/US11438941B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/34—Modification of an existing route
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/16—Threshold monitoring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/90—Buffering arrangements
    • H04L49/9057—Arrangements for supporting packet reassembly or resequencing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/26—Special purpose or proprietary protocols or architectures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
    • H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
    • 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
    • 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

Definitions

  • the present application relates to the field of communications technologies, and in particular, to a communication method and apparatus.
  • data transmission can be directly performed between two terminal devices through a direct-connected wireless interface without the participation of network devices.
  • the data packets can be copied or split between the two terminal devices and then transmitted through multiple interfaces.
  • how the receiving end knows that the data packets received through multiple interfaces need to be aggregated, that is, reordering or deduplicating multiple data packets from multiple interfaces, which is to be studied.
  • the present application provides a communication method and apparatus, which enable a receiving end to know which packets of a channel received through which channels need to be aggregated.
  • the embodiment of the present application provides a communication method, including: receiving, by a first terminal device, a first data packet sent by a second terminal device by using a first channel, where the first channel is carried on a first wireless interface,
  • the first wireless interface is a wireless communication interface that directly communicates between the second terminal device and the first terminal device;
  • the first terminal device receives the second data sent by the second terminal device by using the second channel a packet, the second channel is carried on a second wireless interface, the second wireless interface is a communication interface in which the wireless network device communicates with the first terminal device, or the second wireless interface is the second terminal device
  • Another wireless communication interface that is in direct communication with the first terminal device; wherein the first channel has a mapping relationship with the second channel; the first terminal device uses the first data according to the mapping relationship
  • the packet and the second data packet are transmitted to the same aggregation protocol layer entity for data convergence processing.
  • the first terminal device learns that the first channel and the second channel have a mapping relationship, and the mapping relationship indicates that the data packet received by the first channel and the data packet received by the second channel need to be aggregated in the same convergence.
  • the protocol layer entity so that the first terminal device can determine that the data packet received through the first channel and the data packet received through the second channel need to be aggregated in the same convergence protocol layer entity, thereby performing data aggregation processing.
  • the transmission is performed through two different channels respectively, the same convergence protocol layer entity of the first terminal device is finally aggregated.
  • the first channel is determined to have a mapping relationship with the second channel by:
  • the second data packet received by the second channel carries the identifier information of the first channel, determining that the first channel has a mapping relationship with the second channel.
  • the first terminal device learns that the two channels have a mapping relationship by carrying the identification information of the first channel in the second channel, so that the data packets received through the two channels can be subjected to data aggregation processing.
  • the second channel of the first terminal device is configured with a first adaptation layer, and the first adaptation layer is located above the packet data convergence protocol PDCP layer of the second channel, or The first adaptation layer is located between a packet data convergence protocol PDCP layer and a radio link control protocol RLC layer of the second channel; the first adaptation layer of the second data packet carries the first channel Identification information.
  • the above design modifies the existing protocol stack architecture, does not change the functions of other protocol layers, but adds an adaptation layer in the second channel, and the second terminal device as the transmitting end passes the adaptation layer of the second channel.
  • the identification information of the channel is indicated to the first terminal device, so that the first terminal device learns that the two channels have a mapping relationship, and can further perform data aggregation processing on the data packets received through the two channels.
  • the identification information of the first channel is a logical channel identifier of the first channel.
  • the method further includes: the first terminal device acquiring the first indication information, where the first indication information is used to indicate that the first channel of the first terminal device is configured with the first Matching layer.
  • the second terminal device may obtain the first indication information by receiving the first indication information sent by the wireless network device, and may obtain the first indication information by using the first indication information carried by the second data packet.
  • the first adaptation layer is located above the PDCP layer of the second channel, and the first channel and the second channel share a first convergence layer, the first convergence layer
  • the first aggregation layer is the first aggregation layer, and the first aggregation layer entity corresponding to the first aggregation layer is the convergence protocol layer entity; or
  • An adaptation layer is located between the PDCP layer and the RLC layer of the second channel, the first channel and the second channel share the same PDCP layer, and the same PDCP layer is the first convergence layer,
  • the PDCP layer entity corresponding to the same PDCP layer is the convergence protocol layer entity.
  • the first terminal device may also determine that the first channel and the second channel have a mapping relationship by: For example, the first terminal device receives the configuration information sent by the wireless network device, and the configuration information is used to indicate that the first channel has a mapping relationship with the second channel.
  • the configuration information may include a correspondence between the identifier information of the first channel and the identifier information of the second channel, where the identifier information of the first channel is the first channel
  • the logical channel identifier; the identifier information of the second channel includes a logical channel identifier of the second channel and/or a radio bearer identifier of the second channel.
  • the first terminal device may further determine that the first channel has a mapping relationship with the second channel by: if the first data packet is received by the first channel The identifier information of the second channel is determined to have a mapping relationship between the first channel and the second channel.
  • the first terminal device learns that there is a mapping relationship between the two channels by carrying the identification information of the second channel in the first channel, and can further perform data aggregation processing on the data packets received through the two channels.
  • the first terminal device is configured with a second adaptation layer on the first channel, and the second adaptation layer is located on the PDCP layer of the packet data convergence protocol of the first channel, or The second adaptation layer is located between the PDCP layer and the RLC layer of the first channel; the second adaptation layer of the first data packet carries the identification information of the second channel.
  • the above design modifying the existing protocol stack architecture, does not change the functions of other protocol layers, but adds an adaptation layer in the first channel, and the second terminal device as the transmitting end passes the adaptation layer of the first channel to be the second
  • the identification information of the channel is indicated to the first terminal device, so that the first terminal device learns that the two channels have a mapping relationship, and can further perform data aggregation processing on the data packets received through the two channels.
  • the identification information of the second channel includes a logical channel identifier of the second channel and/or a radio bearer identifier of the second channel.
  • the method further includes: the first terminal device acquiring the second indication information, where the second indication information is used to indicate that the second channel is configured in the first channel of the first terminal device Matching layer.
  • the first terminal device may obtain the second indication information by:
  • the first terminal device receives the second indication information that is sent by the wireless network device, where the second indication information is used to indicate that the first wireless interface of the first terminal device is configured with the second adaptation layer.
  • the first data packet carries the second indication information, where the second indication information is used to indicate that the first wireless interface of the first terminal device is configured with the second adaptation layer, so that the first data packet is from the first data packet.
  • the second adaptation layer is located above a packet data convergence protocol PDCP layer of the first radio interface, the first radio interface and the second radio interface share a second convergence.
  • the second convergence layer is located on the second adaptation layer;
  • the convergence protocol layer is the second convergence layer, and the second convergence layer entity corresponding to the second convergence layer is the convergence protocol a layer entity;
  • the second adaptation layer is located between a PDCP layer and an RLC layer of the first radio interface, where the first radio interface and the second radio interface share the same PDCP layer;
  • the PDCP layer entity corresponding to the same PDCP layer is the convergence protocol layer entity.
  • the PDCP layer of the first data packet includes a first convergence identifier
  • the first convergence identifier is used to indicate a data bearer to which the first data packet belongs
  • the PDCP of the second data packet is The layer includes a second convergence identifier, where the second convergence identifier is used to indicate a data bearer to which the second data packet belongs
  • the first terminal device determines that the first channel has a mapping relationship with the second channel by: The first terminal device determines that the first convergence identifier is the same as the second convergence identifier.
  • the third aggregation layer is located above the PDCP layer of the first terminal device.
  • the third aggregation layer of the first data packet includes a third convergence identifier, where the third convergence identifier is used to indicate a data bearer to which the first data packet belongs, and the third convergence layer of the second data packet includes a fourth convergence identifier, where the fourth convergence identifier is used to indicate a data bearer to which the second data packet belongs;
  • the first terminal device determines that the first channel has a mapping relationship with the second channel by:
  • the first terminal device determines that the third convergence identifier is the same as the fourth convergence identifier.
  • the second wireless interface is a communication interface that directly communicates between the second terminal device and the first terminal device
  • the first wireless interface of the first terminal device is configured with a third An adaptation layer
  • the second radio interface of the first terminal device is configured with a fourth adaptation layer
  • the fourth adaptation layer is located above the PDCP layer of the second radio interface
  • the first wireless The interface and the second wireless interface share a fourth convergence layer, where the fourth convergence layer is located on the third adaptation layer and the fourth adaptation layer
  • the third adaptation of the first data packet The layer includes a fifth convergence identifier, where the fifth convergence identifier is used to indicate that data aggregation is performed on the fourth aggregation layer for the first data packet
  • the fourth adaptation layer of the second data packet includes a sixth convergence layer.
  • the sixth aggregation layer identifier is used to indicate that data aggregation is performed on the fourth aggregation layer for the second data packet. Therefore, the first terminal device determines that the fifth convergence identifier of the third adaptation layer and the sixth convergence identifier of the fourth adaptation layer indicate the same fourth convergence layer, thereby determining that the first data packet and the second data packet need to be aggregated. That is, when the first data packet and the second data packet are both transmitted to the fourth aggregation layer, the first terminal device pairs the first data packet and the fourth convergence layer The second data packet is subjected to data aggregation processing.
  • the first data packet carries third indication information, where the third indication information is used to indicate that the third adaptation layer is configured on the first wireless interface;
  • the data packet carries fourth indication information, where the fourth indication information is used to indicate that the fourth adaptation layer is configured on the second wireless interface.
  • the first wireless interface of the first terminal device is configured with a fifth An adaptation layer, where the fifth adaptation layer is located between the PDCP layer and the RLC layer of the first radio interface, and the second radio interface of the first terminal device is configured with a sixth adaptation layer, The sixth adaptation layer is located between the PDCP layer and the RLC layer of the second radio interface, the first radio interface and the second radio interface share the same PDCP layer; the fifth adaptation of the first data packet
  • the layer includes a seventh convergence identifier, where the seventh convergence identifier is used to indicate that data aggregation is performed on the same PDCP layer for the first data packet; and the sixth adaptation layer of the second data packet includes an eighth convergence identifier And the eighth aggregation layer identifier is used to indicate that data aggregation is performed on the same PDCP layer for the second data packet. That is, when the first data packet and the second data packet are both transmitted to
  • the first data packet carries a fifth indication information, where the fifth indication information is used to indicate that the first wireless interface of the first terminal device is configured with the fifth adaptation layer.
  • the second data packet carries the sixth indication information, where the sixth indication information is used to indicate that the second adaptation layer is configured on the second wireless interface of the first terminal device.
  • the first wireless interface and the second wireless interface are communication interfaces that directly communicate with the second terminal device and the first terminal device in different systems;
  • the first channel has a mapping relationship with the second channel: determining that the first channel has a mapping relationship with the second channel according to a pre-configured mapping rule.
  • the embodiment of the present application provides a communication method, including: a second terminal device sends a first data packet to the first terminal device by using a first channel; The first terminal device sends a second data packet, where the second data packet carries the identification information of the first channel; the first channel is carried on a first wireless interface, and the first wireless interface is in the second a wireless communication interface in which the terminal device directly communicates with the first terminal device, the third channel is carried in a third wireless interface, and the third wireless interface is a wireless communication interface in which the wireless network device communicates with the second terminal device Or the third wireless interface is another wireless communication interface in which the first terminal device directly communicates with the second terminal device; wherein the first data packet and the second data packet are A terminal device performs aggregation processing.
  • the second data packet sent by the second terminal device to the first terminal device in the third channel carries the identifier information of the first channel, so that the first terminal device determines that the first data packet and the second data need to perform data. Convergence processing.
  • the identification information of the first channel is a logical channel identifier of the first channel.
  • the third channel of the second terminal device is configured with an adaptation layer
  • the adaptation layer is located above the PDCP layer of the second channel, or the adaptation layer is located in the Between the PDCP layer and the RLC layer of the second channel, the adaptation layer of the first data packet carries the identification information of the first channel.
  • the method further includes: the second terminal device receiving a dual connectivity indication sent by the wireless network device, where the dual connectivity indication is used to indicate that the second terminal device sends the The first terminal device sends a data packet that needs to be aggregated.
  • the second terminal device may be notified by the wireless network device to enable the dual connection indication, so that the second terminal device starts to send the data packet that needs to be aggregated to the first terminal device through the two channels (the first channel and the third channel). .
  • the method further includes: the second terminal device receives a dual-connection open rule sent by the wireless network device; and when the second terminal device determines that the dual-connection open rule is met, the second terminal device opens the pass-through Transmitting, by the first channel and the third channel, the data packet that needs to be aggregated to the first terminal device, where the dual connectivity initiation rule includes any one or more of the following:
  • the short-distance service packet priority PPPP corresponding to the data packet currently transmitted by the second terminal device is smaller than the first threshold
  • the short-distance service packet reliability PPPR corresponding to the data packet currently transmitted by the second terminal device is less than a second threshold
  • the channel busy ratio CBR of the currently adopted interface of the second terminal device is greater than a third threshold
  • the channel busy ratio CBR of one of the interfaces currently not used by the second terminal device is less than a fourth threshold
  • the signal strength of the currently adopted interface of the second terminal device is less than a fifth threshold
  • the signal strength of one of the interfaces currently not used by the second terminal device is higher than a sixth threshold
  • the number of to-be-transmitted data packets of one of the second terminal device or the second terminal device is greater than a seventh threshold.
  • the second terminal device is configured with the dual connection opening rule by the wireless network device, so that the second terminal device decides when to open the dual connection according to the dual connection opening rule.
  • the embodiment of the present application provides a communication method, including: the second terminal device receives configuration information sent by a wireless network device, where the configuration information is used to indicate that the first channel and the third channel have a mapping relationship;
  • the first channel is carried in a first wireless interface
  • the first wireless interface is a wireless communication interface in which the second terminal device directly communicates with the first terminal device
  • the third channel is carried in a third a wireless interface
  • the third wireless interface is a wireless communication interface that the wireless network device communicates with the second terminal device, or the third wireless interface is directly used by the second terminal device and the first terminal device Another wireless communication interface for communication;
  • the mapping relationship between the two channels of the second terminal device is configured by the wireless network device, so that the second terminal device sends the data packet to the first terminal device to be aggregated to the first terminal device based on the mapping relationship.
  • the configuration information includes a correspondence between the identifier information of the first channel and the identifier information of the third channel, where the identifier information of the first channel is the first channel Logical channel identification;
  • the identification information of the third channel includes a logical channel identifier of the third channel and/or a radio bearer identifier of the third channel.
  • the method further includes: the second terminal device receiving a dual connectivity indication sent by the wireless network device, where the dual connectivity indication is used to indicate that the second terminal device sends the The first terminal device sends a data packet that needs to be aggregated.
  • the second terminal device may be notified by the wireless network device to enable the dual connection indication, so that the second terminal device starts to send the data packet that needs to be aggregated to the first terminal device through the two channels (the first channel and the third channel). .
  • the method further includes: the second terminal device receives a dual-connection open rule sent by the wireless network device; and when the second terminal device determines that the dual-connection open rule is met, the second terminal device opens the pass-through Transmitting, by the first channel and the third channel, the data packet that needs to be aggregated to the first terminal device, where the dual connectivity initiation rule includes any one or more of the following:
  • the short-distance service packet priority PPPP corresponding to the data packet currently transmitted by the second terminal device is smaller than the first threshold
  • the short-distance service packet reliability PPPR corresponding to the data packet currently transmitted by the second terminal device is less than a second threshold
  • the channel busy ratio CBR of the currently adopted interface of the second terminal device is greater than a third threshold
  • the channel busy ratio CBR of one of the interfaces currently not used by the second terminal device is less than a fourth threshold
  • the signal strength of the currently adopted interface of the second terminal device is less than a fifth threshold
  • the signal strength of one of the interfaces currently not used by the second terminal device is higher than a sixth threshold
  • the number of to-be-transmitted data packets of one of the second terminal device or the second terminal device is greater than a seventh threshold.
  • the second terminal device is configured with the dual connection opening rule by the wireless network device, so that the second terminal device decides when to open the dual connection according to the dual connection opening rule.
  • the embodiment of the present application provides a communication method, including: a second terminal device sends a first data packet to a first terminal device by using a first channel, where the first data packet carries a convergence identifier, and the convergence identifier a protocol layer entity for indicating that the first terminal device is configured to carry the data packet of the aggregation identifier, or for indicating a radio bearer to which the first data packet belongs; the second terminal device is configured to use the third channel
  • the first terminal device sends a second data packet, where the second data packet carries the convergence identifier, where the first channel is carried on a first wireless interface, and the first wireless interface is a second terminal device and a communication interface that directly communicates with the first terminal device, where the third channel is carried by a third wireless interface, where the third wireless interface is a communication interface that is communicated between the wireless network device and the second terminal device, or the The third wireless interface is a communication interface in which the second terminal device directly communicates with the first terminal device.
  • the two data packets sent by the two channels carry the same convergence identifier, so that the first terminal device determines that the two channels have a mapping relationship, and the two data packets need to be aggregated.
  • the third wireless interface is a communication interface that directly communicates between the second terminal device and the first terminal device
  • the first channel of the second terminal device is configured with a first suitable a third layer of the second terminal device configured with a second adaptation layer
  • the first adaptation layer of the first data packet includes the convergence identifier
  • the second data packet includes the convergence identifier
  • the first adaptation layer is located between the PDCP layer of the first channel and the radio link control protocol RLC layer, and the second adaptation layer is located between the PDCP layer and the RLC layer of the third channel.
  • the first channel and the third channel of the second terminal device share the same PDCP layer; or the first adaptation layer is located on the PDCP layer of the packet data convergence protocol of the first channel, where The second adaptation layer is located above the PDCP layer of the third channel, the first channel and the third channel share the same convergence layer, and the convergence layer is located at the first adaptation layer and the first Above the second adaptation layer.
  • the protocol layer architecture is modified.
  • the same convergence identifier is added to the adaptation layers added to the two channels.
  • the PDCP layer of the first data packet includes the convergence identifier
  • the second data packet includes the convergence identifier
  • the convergence layer is located on the PDCP layer of the second terminal device; the first data The aggregation layer of the packet includes the convergence identifier; the convergence layer of the second data packet includes the convergence identifier.
  • the method further includes: the second terminal device receiving a dual connectivity indication sent by the wireless network device, where the dual connectivity indication is used to indicate that the second terminal device sends the The first terminal device sends a data packet that needs to be aggregated.
  • the second terminal device may be notified by the wireless network device to enable the dual connection indication, so that the second terminal device starts to send the data packet that needs to be aggregated to the first terminal device through the two channels (the first channel and the third channel). .
  • the method further includes: the second terminal device receives a dual-connection open rule sent by the wireless network device; and when the second terminal device determines that the dual-connection open rule is met, the second terminal device opens the pass-through Transmitting, by the first channel and the third channel, the data packet that needs to be aggregated to the first terminal device, where the dual connectivity initiation rule includes any one or more of the following:
  • the short-distance service packet priority PPPP corresponding to the data packet currently transmitted by the second terminal device is smaller than the first threshold
  • the short-distance service packet reliability PPPR corresponding to the data packet currently transmitted by the second terminal device is less than a second threshold
  • the channel busy ratio CBR of the currently adopted interface of the second terminal device is greater than a third threshold
  • the channel busy ratio CBR of one of the interfaces currently not used by the second terminal device is less than a fourth threshold
  • the signal strength of the currently adopted interface of the second terminal device is less than a fifth threshold
  • the signal strength of one of the interfaces currently not used by the second terminal device is higher than a sixth threshold
  • the number of to-be-transmitted data packets of one of the second terminal device or the second terminal device is greater than a seventh threshold.
  • the second terminal device is configured with the dual connection opening rule by the wireless network device, so that the second terminal device decides when to open the dual connection according to the dual connection opening rule.
  • the embodiment of the present application provides a communication method, including: determining, by a wireless network device, a dual connectivity indication; the wireless network device sending a dual connectivity indication to the second terminal device, where the dual connectivity indication is used to indicate The second terminal device sends the data packet that needs to be aggregated to the first terminal device through two channels.
  • the dual-connection indication is sent by the wireless network device to the second terminal device, so that the second terminal device, when receiving the indication, starts to send the first terminal device to the first terminal device through two channels. data pack.
  • the method before the wireless network device sends the dual connectivity indication to the second terminal device, the method further includes: determining, by the wireless network device, that the at least one parameter reported by the second terminal device meets a preset rule .
  • the preset rule includes any one or more of the following:
  • the short-distance service packet priority PPPP corresponding to the data packet currently transmitted by the second terminal device is smaller than the first threshold
  • the short-distance service packet reliability PPPR corresponding to the data packet currently transmitted by the second terminal device is less than a second threshold
  • the channel busy ratio CBR of the currently adopted interface of the second terminal device is greater than a third threshold
  • the channel busy ratio CBR of one of the interfaces currently not used by the second terminal device is less than a fourth threshold
  • the signal strength of the currently adopted interface of the second terminal device is less than a fifth threshold
  • the signal strength of one of the interfaces currently not used by the second terminal device is higher than a sixth threshold
  • the number of to-be-transmitted data packets of one of the second terminal device or the second terminal device is greater than a seventh threshold.
  • the method may further include: the wireless network device receiving the data packet sent by the second terminal device by using the third channel, where the data packet carries the identification information of the first channel, the first channel
  • the first wireless interface is a communication interface that the first terminal device communicates with the second terminal device, the three channels are carried on a third wireless interface, and the third wireless interface is a communication interface that the wireless network device communicates with the second terminal device;
  • the wireless network device receives the destination information sent by the second terminal device; wherein the destination information includes any one or more of the following: Determining the identification information of the first terminal device, the group identifier of the group in which the first terminal device is located, and the service identifier to which the data packet belongs; the wireless network device determining, according to the destination information, the wireless network device and the a second channel communicated by the terminal device; the wireless network device sends the data packet to the first terminal device through the second channel.
  • the wireless network device is configured with an adaptation layer, the adaptation layer is located above a packet data convergence protocol PDCP layer of the wireless network device, or the adaptation layer is located in the wireless Between the PDCP layer of the network device and the radio link control protocol RLC layer; the first adaptation layer of the second data packet carries the identification information of the first channel.
  • the wireless network device receives the first data packet sent by the second terminal device by using the third channel, and the wireless network device receives the destination information sent by the second terminal device, including: the network device And receiving, by the third channel, the data packet sent by the second terminal device, where the adaptation layer of the data packet carries the identifier information of the first channel and the destination information.
  • the embodiment of the present application provides a communication method, including: determining, by a wireless network device, a dual connectivity initiation rule; the wireless network device sending the dual connectivity initiation rule to a second terminal device, the dual connectivity initiation rule And indicating that the second terminal device sends a data packet that needs to be aggregated to the first terminal device by using two channels when determining that the dual-connection open rule is met; wherein the dual-connection open rule includes the following One or more items:
  • the short-distance service packet priority PPPP corresponding to the data packet currently transmitted by the second terminal device is smaller than the first threshold
  • the short-distance service packet reliability PPPR corresponding to the data packet currently transmitted by the second terminal device is less than a second threshold
  • the channel busy ratio CBR of the currently adopted interface of the second terminal device is greater than a third threshold
  • the channel busy ratio CBR of one of the interfaces currently not used by the second terminal device is less than a fourth threshold
  • the signal strength of the currently adopted interface of the second terminal device is less than a fifth threshold
  • the signal strength of one of the interfaces currently not used by the second terminal device is higher than a sixth threshold
  • the number of to-be-transmitted data packets of one of the second terminal device or the second terminal device is greater than a seventh threshold.
  • the embodiment of the present application provides a communication method, including:
  • the second wireless network device receives the data packet sent by the second terminal device by using the third channel, where the data packet carries the identifier information of the first channel, where the first channel is carried on the first wireless interface, and the first wireless interface a communication interface for the first terminal device to communicate with the second terminal device, the third channel is carried on a third wireless interface, and the third wireless interface is the second wireless network device and the second terminal device a communication interface of the communication; the second wireless network device serves the second terminal device;
  • the first wireless network device Transmitting, by the second wireless network device, the data packet to the first wireless network device by using a user plane forwarding tunnel between the second wireless network device and the first wireless network device; the first wireless network The device serves the first terminal device. Therefore, after receiving the data packet, the first wireless network device determines a second channel that the first wireless network device communicates with the first terminal device, where the second channel is carried on the second wireless interface, and the second wireless interface is a communication interface in which the first wireless network device communicates with the first terminal device.
  • the second wireless network device may obtain the identification information of the first channel by using the identifier information of the first channel as the user plane bearer to be sent to the first wireless network device by using the process of sending the data packet. Then, it is sent to the first wireless network device through the control plane or the user plane.
  • the present application provides a communication device, where the communication device is provided with a function of implementing the first terminal device related to the first aspect, for example, the communication device includes the first terminal device performing the foregoing first aspect.
  • the modules or units or means corresponding to the steps may be implemented by software, or by hardware, or by corresponding software implementation by hardware.
  • the communication device is provided with the function of implementing the second terminal device according to any one of the second aspect to the fourth aspect, or the function of the wireless network device according to the fifth aspect or the seventh aspect.
  • the communication device includes a processing unit, a transceiver unit, and the processing unit, the function performed by the transceiver unit may correspond to the step performed by the first terminal device involved in the first aspect, or the second
  • the steps performed by the second terminal device designed in any aspect of the fourth aspect correspond to the steps performed by the wireless network device of any of the fifth to seventh aspects, and are not described herein.
  • the communication device includes a processor, and may further include a transceiver for transmitting and receiving signals, and the processor executes program instructions to perform the above first aspect and the first aspect.
  • a method performed by the first terminal device in a possible design or implementation, or a method performed by the second terminal device in any of the second to fourth aspects, or wireless in any of the fifth to seventh aspects The method that the network device performs.
  • the communication device may further comprise one or more memories for coupling with the processor, which hold necessary computer program instructions and/or data for implementing the functions of the first terminal device involved in the first aspect above.
  • the one or more memories may be integrated with the processor or may be separate from the processor. This application is not limited.
  • the processor may execute the computer program instructions stored in the memory to complete the first aspect and the method performed by the first terminal device in any possible design or implementation manner of the first aspect, or complete the second to fourth aspects A method performed by a second terminal device in an aspect, or a method performed by a wireless network device in any of the fifth to seventh aspects.
  • the present application provides a chip, the chip may be in communication with a memory, or the chip includes a memory, and the chip executes program instructions stored in the memory to implement the first to seventh aspects described above
  • the corresponding function of the first terminal device or the second terminal device or the wireless network device (including the first wireless network device and the second wireless network device) designed in the aspect.
  • the present application provides a computer storage medium storing computer readable instructions, when the computer readable instructions are executed, such that the first terminal designed in the first to seventh aspects is implemented Corresponding functions of the device or the second terminal device or the wireless network device (including the first wireless network device and the second wireless network device).
  • the present application further provides a computer program product comprising a software program, when executed on a computer, to implement the first terminal device or the second terminal device designed in the first to seventh aspects or wirelessly Corresponding functions of network devices, including the first wireless network device and the second wireless network device.
  • the present application further provides a communication system including the first terminal device involved in the above first to seventh aspects, and/or the second terminal device in the communication system And/or the wireless network device (which may include a first wireless network device and a second wireless network device).
  • FIG. 1 is a schematic diagram of a wireless communication system to which an embodiment of the present application is applied;
  • FIG. 2 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 3 is a schematic block diagram of a first protocol stack architecture provided by an embodiment of the present application.
  • FIG. 4 is a schematic block diagram of a second protocol stack architecture provided by an embodiment of the present application.
  • FIG. 5 is a schematic block diagram of a third protocol stack architecture provided by an embodiment of the present application.
  • FIG. 6 is a schematic block diagram of a fourth protocol stack architecture provided by an embodiment of the present application.
  • FIG. 7 is a schematic block diagram of a fifth protocol stack architecture provided by an embodiment of the present application.
  • FIG. 8 is a schematic block diagram of a sixth protocol stack architecture provided by an embodiment of the present application.
  • FIG. 9 is a schematic block diagram of a seventh protocol stack architecture provided by an embodiment of the present application.
  • 10A is a schematic block diagram of an eighth protocol stack architecture provided by an embodiment of the present application.
  • FIG. 10B is a schematic block diagram of a protocol stack architecture transparent to an adaptation layer by a wireless network device according to an embodiment of the present application.
  • FIG. 11 is a schematic block diagram of a ninth protocol stack architecture provided by an embodiment of the present application.
  • FIG. 12 is a schematic block diagram of a tenth protocol stack architecture provided by an embodiment of the present application.
  • FIG. 13 is a schematic block diagram of an eleventh protocol stack architecture provided by an embodiment of the present application.
  • FIG. 14 is a schematic block diagram of a twelfth protocol stack architecture provided by an embodiment of the present application.
  • FIG. 15 is a schematic structural diagram of a communication device 1500 according to an embodiment of the present application.
  • FIG. 16 is a schematic structural diagram of a communication device 1600 according to an embodiment of the present application.
  • FIG. 17 is a schematic structural diagram of a wireless network device according to an embodiment of the present disclosure.
  • FIG. 18 is a schematic structural diagram of a terminal device according to an embodiment of the present disclosure.
  • 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 .
  • the wireless communication system can include a wireless network device 110 and a terminal device.
  • Wireless network device 110 may be a device that communicates with the terminal device.
  • Wireless network device 110 can provide communication coverage for a particular geographic area and can communicate with terminal devices located within the coverage area.
  • FIG. 1 exemplarily shows one wireless network device 110 and two terminals (a first terminal device 120 and a second terminal device 130).
  • the wireless communication system may include a plurality of wireless network devices, each wireless Other numbers of terminals may be included in the coverage of the network device, which is not limited in this embodiment of the present application.
  • the wireless communication system may also 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.
  • a wireless network device may be referred to as a radio access network (RAN) device, and may be, for example, a base station, a transmit and receive point (TRP), or an access node.
  • the node may be a base station in a global system for mobile communication (GSM) system or a code division multiple access (CDMA) system, or may be a wideband code division multiple access (wideband code division multiple access,
  • GSM global system for mobile communication
  • CDMA code division multiple access
  • a base station (NodeB) in a WCDMA system may also be an evolved base station (evolutional node B, eNB or eNodeB) in an LTE system, or a base station device, a small base station device, and a wireless access node (WiFi AP) in a 5G network.
  • the present invention is not limited in terms of a global interoperability for microwave access base station (WiMAX BS).
  • 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; the terminal may also be referred to as an access device.
  • Terminal user equipment (UE), subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, wireless communication device, user agent or user device.
  • the terminal can be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), and a wireless communication function.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • the second terminal device 130 can communicate with the first terminal device 120 through a direct-connected wireless interface, which can be understood as an air interface for direct communication between the terminal devices.
  • a direct-connected wireless interface which can be understood as an air interface for direct communication between the terminal devices.
  • it may be a PC5 interface in the Internet of Vehicles, including a PC5 interface defined by the LTE system or a PC5 interface defined by the new system New Radio, that is, the NR system, and is collectively referred to as LTE PC5 and NR PC5.
  • the data transmission between the terminals through the direct-connected wireless interface can eliminate the wireless network device from participating in the data transmission process, and is beneficial to reducing the delay of data transmission between the terminal devices.
  • the first terminal device 120 can also communicate with the second terminal device 130 through a non-directly connected wireless interface, which can be understood as a wireless interface and communication between the second terminal device 130 and the wireless network device 110.
  • the wireless interface communicated between the network device 110 and the first terminal device 120 may be a Uu interface, and also includes a Uu interface defined by the LTE system or a Uu interface defined by the new standard NR system, and is collectively referred to as LTE Uu and NR Uu.
  • the 3rd generation partnership project is discussing carrier aggregation (CA) based on carrier aggregation (CA) for LTE PC5 interface, where data offload convergence refers to packet duplication of the sender. Reordering and repeating packet detection at the receiving end.
  • the data split aggregation involved in the implementation of the present application includes two cases: the first case is packet duplication of the sender and the packet split of the packet, and the reordering and repeated packet detection at the receiving end. .
  • the second case is the offloading of the data packet at the transmitting end and the reordering and repeated packet detection at the receiving end. From the perspective of the sender, the replication of the data packet means that the sender replicates the data packet.
  • the splitting of the data packet means that the sending end sends multiple data packets belonging to the same aggregation protocol layer entity to the receiving end through multiple different channels, and the multiple data packets may have the same SN number or different SN numbers.
  • the transmitting end sends the copied multiple identical (that is, the same SN number) data packets to the receiving end through multiple different channels, or multiple different (ie, different SN numbers) that have not been copied.
  • the data packets are sent to the receiving end through a number of different channels.
  • the reordering and repeated packet detection of the data packet means that the data received by the receiving end through different channels is sent to the same aggregation layer entity, and the reordering and repeated packet detection are performed according to the serial number SN of the data packet. .
  • the channel is carried on the radio interface between the transmitting end and the receiving end. For example, one channel is carried on the PC5 interface, and the other channel is carried on the Uu interface.
  • one of the channels carries the PC5 interface under the NR system, and the other channel carries the PC5 interface under the LTE system.
  • both channels are carried on the PC5 interface under the NR system, or both channels are carried on the PC5 interface under the LTE system.
  • the receiving end cannot know which packets are received through which channels need to be aggregated to the same aggregation protocol layer entity.
  • the embodiment of the present application provides a communication method and device, which acquires a mapping relationship between different channels before the receiving end aggregates data packets, thereby determining a data packet received through multiple channels having a mapping relationship. Data aggregation. Therefore, the problem that the existing receiving end does not know which channels are received by the receiving end needs to be aggregated.
  • the term "and/or” herein is merely an association relationship describing an associated object, indicating that there may be three relationships, for example, A and/or B, which may indicate that A exists separately and exists simultaneously. A and B, there are three cases of B alone.
  • the character "/" in this article generally indicates that the contextual object is an "or" relationship.
  • FIG. 2 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • the first terminal device shown in FIG. 2 may be the first terminal device 130 shown in FIG. 1, or a chip located on the first terminal device 130, or a communication module located on the first terminal device 130;
  • the terminal device may be the second terminal device 120 shown in FIG. 1, or a chip located on the second terminal device 120, or a communication module located on the first terminal device 130.
  • the first terminal device receives the first data packet sent by the second terminal device by using the first channel.
  • the second terminal device sends the first data packet to the first terminal device by using the first channel, so that the first terminal device receives the first data packet by using the first channel.
  • the first channel is carried by the first wireless interface, and the first wireless interface is a wireless communication interface that directly communicates between the second terminal device and the first terminal device.
  • the first terminal device receives the second data packet sent by the second terminal device by using the second channel.
  • the second channel is carried on the second wireless interface.
  • the second wireless interface is another wireless communication interface that is directly communicated between the second terminal device and the first terminal device.
  • the above first wireless interface may be the direct wireless interface mentioned above for direct communication between terminal devices, such as a PC5 interface in a vehicle network.
  • the second terminal device sends the first data packet to the first terminal device through the first channel (for example, logical channel 1) of the LTE PC5 or NR PC5 interface.
  • the second wireless interface may be another direct wireless interface for direct communication between the terminal devices.
  • the first wireless interface and the second wireless interface may be direct wireless interfaces in the same communication system, such as wireless interfaces in the NR system, or wireless interfaces in the LTE system.
  • the first wireless interface and the second wireless interface may also be direct wireless interfaces in different communication systems, such as one of the wireless interfaces in the NR system and the other is the wireless interface in the LTE system.
  • the second terminal device transmits the second data packet to the first terminal device through the second channel (for example, logical channel 2) of the LTE PC5 or NR PC5 interface.
  • the second wireless interface is a wireless communication interface that is communicated by the wireless network device with the first terminal device, and is also referred to as a non-directly connected wireless interface, such as a Uu interface.
  • the second terminal device may transmit the data packet to the wireless network device by using the third channel, so that the wireless network device transmits the data packet to the first terminal device by using the second channel that is carried by the second wireless interface.
  • the third channel is carried on the third wireless interface, and the third wireless interface is a wireless communication interface, such as a Uu interface, in which the second terminal device communicates with the wireless network device.
  • the second terminal device sends the second data packet to the wireless network device through the third channel of the LTE Uu or NR Uu interface (for example, logical channel 2 or wireless data bearer 2).
  • the wireless network device transmits the second data packet to the first terminal device through the second channel of the LTE Uu or NR Uu interface (eg, logical channel 3 or wireless data bearer 3).
  • mapping relationship between the first channel and the second channel.
  • the mapping relationship is used to indicate that the data packet received by the first channel and the data packet received by the second channel need to be aggregated in the same convergence protocol layer entity.
  • the first terminal device may be, but is not limited to, determining, by using the following manner, a mapping relationship between the first channel and the second channel.
  • the first channel and the second channel have a mapping relationship.
  • the first terminal device receives the configuration information sent by the wireless network device, where the configuration information is used to indicate that the first channel and the second channel have a mapping relationship.
  • the configuration information may include a correspondence between the identifier information of the first channel and the identifier information of the second channel.
  • the identifier information of the first channel may be a logical channel identifier or a logical channel identifier list of the first channel.
  • the identification information of the second channel may be the logical channel identifier of the second channel and/or the radio bearer identifier of the second channel, that is, the identifier information of the second channel may be the logical channel identifier of the second channel, or the identifier information of the second channel.
  • the radio bearer identifier of the second channel may be used, or the identifier information of the second channel may include a logical channel identifier of the second channel and a radio bearer identifier of the second channel.
  • the convergence identifier carried by the convergence protocol layer of the first data packet is the same as the convergence identifier carried by the convergence protocol layer of the second data packet.
  • the aggregation identifier is used to indicate the wireless data bearer to which the data packet carrying the convergence identifier belongs or the corresponding convergence protocol layer entity.
  • the aggregation protocol layer may be a PDCP protocol layer or a new protocol layer.
  • the new protocol layer is called an aggregation layer.
  • the first channel and the second channel have a mapping relationship.
  • the first terminal device determines that the first channel and the second channel have a mapping relationship according to the pre-configured mapping rule by pre-configuring the mapping rule in the first terminal device.
  • the fifth possible manner is applicable to the case where the first wireless interface and the second wireless interface are direct wireless interfaces.
  • the first terminal device and the second terminal device can determine, in this manner, that the first channel and the second channel have a mapping relationship.
  • the first terminal device transmits the first data packet and the second data packet to a same aggregation protocol layer entity according to the mapping relationship to perform data aggregation processing.
  • the first terminal device that receives the second data packet by using the second channel that is carried by the second wireless interface may be used. It belongs to a set of terminal devices, that is, the second terminal device transmits the second data packet to the wireless network device through the third channel, and after receiving the second data packet, the wireless network device can help the second through multicast or broadcast.
  • the terminal device transmits the second data packet to the terminal device set, the terminal device set including the first terminal device.
  • the first terminal device and the second terminal device may belong to the same wireless network device.
  • the first terminal device and the second terminal device access the same wireless network device.
  • the wireless network device that assists the second terminal device in forwarding the second data packet to the first terminal device mentioned above is the wireless network device to which the first terminal device and the second terminal device access.
  • the first terminal device and the second terminal device may also belong to different wireless network devices.
  • the wireless network device accessed by the first terminal device is referred to as a first wireless network device, and the second terminal device is accessed.
  • a wireless network device is referred to as a second network device.
  • the wireless network device mentioned above that assists the second terminal device to forward the second data packet to the first terminal device includes the first wireless network device and the second wireless network device.
  • the first terminal device as the receiving end can determine the data packet received through the first channel and the data received through the second channel by learning the mapping relationship between the first channel and the second channel.
  • the data packets need to be aggregated in the same aggregation protocol layer entity to perform data aggregation processing.
  • the aggregation is finally concentrated in the same convergence protocol layer entity.
  • the data packets transmitted by the two channels of the two radio interfaces are sent to the same aggregation protocol layer entity for data aggregation.
  • the embodiment of the present application improves the existing protocol stack and provides more Different protocol stacks.
  • the architecture of each protocol stack and the manner of transmitting data packets are described in detail below with reference to the accompanying drawings.
  • the following is a description of the first case of data traffic aggregation.
  • the processing of the first case is similar to the processing of the second case. The only difference is that in the first case, when the transmitting end performs processing, it also includes copying of the data packet, and in the second case, only the flow is performed, and the data packet is not executed. The copy operation is not repeated for the specific process of the second case.
  • the first protocol stack architecture the first wireless interface carrying the first channel is a direct wireless interface in which the second terminal device directly communicates with the first terminal device, and the second wireless interface carrying the second channel is a wireless network device and the first The indirect wireless interface that communicates between the terminal devices, and the third wireless interface that carries the third channel is an indirect wireless interface that communicates between the second terminal device and the wireless network device. Both the first terminal device and the second terminal device belong to the wireless network device.
  • FIG. 3 it is a schematic diagram of a protocol layer architecture in a first terminal device, a second terminal device, and a wireless network device.
  • FIG. 3 only shows a protocol layer related to the embodiment of the present application in the first terminal device, the second terminal device, and the wireless network device.
  • the first terminal device, the second terminal device, and the wireless network device may further include other protocol layers.
  • the application examples are not specifically limited thereto.
  • an adaptation layer is added to the protocol stack architecture corresponding to the second channel and the third channel of the indirectly connected wireless interface between the first terminal device and the second terminal device, where the adaptation layer is added. It can be located between a packet data convergence protocol (PDCP) layer and a radio link control (RLC) layer.
  • PDCP packet data convergence protocol
  • RLC radio link control
  • an adaptation layer is configured between the first terminal device and the PDCP layer and the RLC layer of the second channel of the wireless network device, and the PDCP layer and the RLC of the third channel of the second terminal device and the wireless network device
  • An adaptation layer is disposed between the layers. The first channel and the second channel share the same PDCP layer in the first terminal device, and the first channel and the third channel in the second terminal device share the same PDCP layer.
  • the protocol stack structure shown in FIG. 3 may be applicable to the first possible manner of determining that the first channel and the second channel have a mapping relationship, and the adaptation layer of the second data packet carries the identification information of the first channel.
  • the second terminal device at the PDCP layer, can perform a copy process on the data packet to be sent to obtain a first data packet and a second data packet.
  • the copy processing may be performed by copying the data packet to be sent to obtain the same first data packet and the second data packet, that is, the sequence number of the first data packet is the same as the sequence number of the second data packet. For the case of splitting the first data packet and the second data packet of different serial numbers through different channels, the copy processing may not be performed.
  • the second terminal device adds the identification information of the first channel to the second data packet in the adaptation layer of the third channel. Then, after being processed by the RLC layer of the third channel and each entity under the RLC layer, the third network interface is sent to the wireless network device.
  • the first data packet since the adaptation layer is not configured in the first channel, the first data packet does not pass through the adaptation layer, but directly reaches the RLC layer, passes through the RLC layer of the first channel and under the RLC layer. After being processed by each entity, the first entity device sends the first terminal device.
  • the second terminal device may further add source information (Source Information, Src Info) and destination information (Dest Info) to the second data packet in the adaptation layer of the third channel.
  • Source Information Source Information, Src Info
  • Dest Info destination information
  • the source information is used to indicate the second terminal device, for example, the first wireless interface is used to identify address information of the second terminal device, such as an internet protocol (IP) address, and media access control (media access). Control, MAC) address, for example, the source information may also be identification information or service identification information of the second terminal device.
  • IP internet protocol
  • MAC media access control
  • the identifier information of the second terminal device may be an ID of the second terminal device that is short-range communication, such as a ProSe UE ID, a ProSe layer 2 group ID, and a destination.
  • Destination layer 2 ID may also be an international mobile subscriber identification number (IMSI), or may be allocated for protection of the privacy network
  • IMSI international mobile subscriber identification number
  • the destination information is similar to the source information, and may include the first wireless interface for identifying address information of the first terminal device, such as address information (eg, an IP address, a MAC address, etc.) of the first terminal device, and the first terminal.
  • Device identification information eg, ProSe UE ID, ProSe Layer 2 group ID, destination layer 2 ID, platnoon group ID, IMSI, etc.
  • a service identifier to which the second data packet belongs eg, MBMS session ID, TMGI, etc.
  • the address information of the group in which the terminal device is located or the group identifier of the group in which the second terminal device is located such as the IP multicast address corresponding to the group in which the first terminal device is located, the MAC multicast address corresponding to the group in which the first terminal device is located, or the network allocation
  • the group ID of the group in which the first terminal device is located and the like.
  • the wireless network device When the adaptation layer carries the destination information, the wireless network device directly finds the identifier of the corresponding first terminal device on the second wireless interface by using the destination information. For example, when the destination information is the address information (for example, an IP address, a MAC address, and the like) of the first terminal device, the wireless network device performs matching according to the address information reported by the first terminal device, for example, a cell radio network temporary identifier (cell radio network temporary) If the IP address or MAC address reported by the terminal device corresponding to the user of x is y, the corresponding C-RNTI or other network side identifier can be found according to the IP address or MAC address y.
  • the destination information is the address information (for example, an IP address, a MAC address, and the like) of the first terminal device
  • the wireless network device performs matching according to the address information reported by the first terminal device, for example, a cell radio network temporary identifier (cell radio network temporary) If the IP address or MAC address reported by the terminal device corresponding
  • the wireless network device performs the address information reported by the first terminal device. For example, if the user whose C-RNTI identifier is x reports the ProSe Layer 2 group ID/destination layer 2 ID/IMSI identifier is y, the corresponding C-RNTI or other RAN side identifier may be found according to the address information.
  • the first terminal device identification information for example, the ProSe UE ID, the ProSe Layer 2 group ID, the destination layer 2 ID, the platnoon group ID, the IMSI, etc.
  • the wireless network device performs the address information reported by the first terminal device. For example, if the user whose C-RNTI identifier is x reports the ProSe Layer 2 group ID/destination layer 2 ID/IMSI identifier is y, the corresponding C-RNTI or other RAN side identifier may be found according to the address information.
  • the wireless network device directly determines that the identifier of the first terminal device on the second interface is MBMS. Session ID, TMGI or RAN side group identifier.
  • the process of the destination information obtained by the foregoing wireless network device may be indicated by the second terminal device, for example, the second terminal device indicates the destination information of the wireless network device by using a radio resource control (RRC) message.
  • RRC radio resource control
  • the manner in which the wireless network device obtains the foregoing destination information is not specifically limited in this embodiment of the present application. If the second terminal device indicates the destination information of the wireless network device by using the RRC message, the destination layer does not need to carry the destination information.
  • the identifier information of the first channel may also be carried by other methods, for example, by the MAC sub-header of the third channel.
  • the MAC subheader of the original third channel carries the logical channel identifier of the third channel.
  • the mapping between the first channel and the third channel is determined by additionally adding the identification information of the first channel to the MAC sub-header of the third channel.
  • the wireless network device determines the mapping relationship between the first channel and the second channel.
  • the identification information of the first channel is added in the MAC subheader of the second channel.
  • the receiving end determines that the first channel and the second channel have a mapping relationship according to the logical channel identifier of the second channel carried by the MAC sub-header of the second channel and the identifier information of the first channel.
  • the processing of the first data packet and the second data packet under the RLC layer and the RLC layer may be substantially the same as the process of transmitting the data packet in the prior art, and details are not described herein again.
  • the wireless network device After receiving the second data packet by using the third channel that is carried by the third wireless interface, the wireless network device determines, according to the destination information carried by the adaptation layer in the wireless network device, the first terminal device of the second data packet, Thereby determining a second channel in which the wireless network device communicates with the first terminal device.
  • the wireless network device sends the second data packet carrying the identification information of the first channel to the first terminal device.
  • the wireless network device After determining the second channel in which the wireless network device communicates with the first terminal device, after determining the first terminal device according to the destination information, the wireless network device determines a mapping relationship between the first channel and the second channel, thereby Obtaining a second channel in which the wireless network device communicates with the first terminal device.
  • the wireless network device determines, by the destination node of the second data packet, that the first terminal device is in the identifier of the second wireless interface.
  • the identifier of the first terminal device in the second radio interface is a unique identifier in the cell, such as a C-RNTI or other RAN side identifier.
  • the destination node is a multi-node, that is, the multicast, that is, the destination node of the second data packet is a plurality of first terminal devices, and the identifier of the first terminal device on the second radio interface is a group identifier.
  • the wireless network device may perform any processing on the adaptation layer or delete other information except the first channel identification information, and directly send the second data packet carrying the adaptation layer to the RLC layer of the second channel, and pass through the second channel. After processing, the RLC layer and each entity under the RLC layer are sent to the first terminal device through the second radio interface.
  • the first terminal device After receiving the second data packet by using the second channel, the first terminal device determines that the adaptation layer of the second data packet carries the identifier information of the first channel, thereby determining the first channel and the second channel.
  • the first terminal device transmits the first data packet received through the first channel and the second data packet received through the second channel to the same convergence protocol layer entity for data aggregation processing. That is, data aggregation is performed in the same PDCP layer entity.
  • the data aggregation process includes reordering and repeated packet detection, specifically, sorting according to the PDCP SN number. When a packet of a specific PDCP SN number is repeatedly present, the recurring packet is deleted, and only one packet corresponding to the PDCP SN number is reserved.
  • the first terminal device needs to know the existence of the adaptation layer, so that the second terminal can be obtained from the second
  • the adaptation layer of the data packet acquires the identification information of the first channel.
  • a method for obtaining the presence of the adaptation layer is that the wireless network device sends the indication information to the first terminal device, where the indication information is used to indicate that the second channel of the second wireless interface of the first terminal device is configured with an adaptation layer.
  • the wireless network device may carry the indication information in an RRC message, or include the indication information in Downlink Control Information (DCI), or indicate at other protocol layers, for example, an RLC header or a MAC subheader. The presence of the layer.
  • DCI Downlink Control Information
  • Another way of obtaining the adaptation layer is to carry the indication information in the MAC layer of the second data packet when the wireless network device forwards the second data packet to the first terminal device.
  • Another way of knowing that the adaptation layer exists is that if the first channel of the first radio interface is preferentially established and then the second channel of the second radio interface is established, the base station can establish the second channel of the second radio interface, ie The second channel configured to the first terminal device has an adaptation layer. If the second channel of the second radio interface is preferentially established, the base station may reconfigure the second channel in the RRC message, that is, indicate the presence of the adaptation layer.
  • the PDCP entity of the first terminal device performs data aggregation on the first data packet and the second data packet, where the first data packet and the second data packet are generated based on the same data packet, that is, the first data packet is the second data packet.
  • the copy of the data packet, or the second data packet is a copy of the first data packet, and the PDCP entity may discard any of the first data packet and the second data packet. If the first data packet and the second data packet are not generated based on the same data packet, that is, the sequence numbers of the first data packet and the second data packet are different, the PDCP entity of the first terminal device pairs the first data packet and the first data packet The second packet is reordered.
  • 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 channel and the second channel are used. The aggregation is performed, and the changes to the existing protocol stack are small. The detailed aggregation process is not described here.
  • the second terminal device obtains the first data packet and the second data packet by performing a replication process on the PDCP layer, and the first data packet is sent by using the first channel and the third channel of the second terminal device respectively. And the second packet is sent.
  • the second terminal device can learn that the first channel and the third channel have a mapping relationship by any of the following methods:
  • Possible mode 1 The mapping relationship between the first channel carried on the first wireless interface and the third channel carried on the third wireless interface is configured by the wireless network device.
  • the wireless network device sends the first configuration information to the second terminal device, where the first configuration information is used to indicate that the first channel and the third channel have a mapping relationship.
  • the first configuration information may include a correspondence between the identifier information of the first channel and the identifier information of the second channel, where the identifier information of the first channel may be a logical channel identifier of the first channel, or a logic A channel identifier list, where the logical channel identifier list includes a logical channel identifier of the first channel.
  • the identification information of the third channel includes a logical channel identifier of the third channel and/or a radio bearer identifier of the third channel.
  • the identification information of the first channel is PC5 LCID (PC5 LCID list), and the identification information of the third channel is Uu LCID/Uu DRB ID.
  • the wireless network device provides the Uu LCID/DRB ID and the corresponding PC5LCID (or PC5 LCID list) in the first configuration information.
  • the first configuration information may further include destination information of the receiving end corresponding to the PC5 LCID (or PC5 LCID list) (for details, refer to the foregoing details), so that the sending end (second terminal device) identifies the second terminal device and Which of the PC5 interface channels between the receivers (here, the first terminal device) is bound to which channel of the Uu interface.
  • the wireless network device may send the first configuration information to the second terminal device by using an RRC message or a broadcast message or a MAC control unit (CE) CE.
  • RRC message or a broadcast message or a MAC control unit (CE) CE.
  • CE MAC control unit
  • Possible mode 2 When the second terminal device determines to send the data packet to be aggregated to the first terminal device through the two channels, it is determined by itself which channel of the first wireless interface and which channel of the third wireless interface have a mapping relationship. .
  • the second terminal device when the second terminal device determines to initiate the dual connection based on the dual connection opening rule, the second terminal device may Determine which channel of the PC5 interface is bound to which channel of the Uu interface. Specifically, how to determine which two channels have a mapping relationship by using dual connectivity, refer to the detailed description when describing the dual connectivity opening rule.
  • the second protocol stack architecture, the first wireless interface carrying the first channel is a direct wireless interface in which the second terminal device directly communicates with the first terminal device, and the second wireless interface carrying the second channel is the first wireless network device and
  • the indirect wireless interface that communicates between the first terminal devices, and the third wireless interface that carries the third channel is a non-directly connected wireless interface that communicates between the second terminal device and the second wireless network device.
  • the first terminal device belongs to the first wireless network device, and the second terminal device belongs to the second wireless network device.
  • the protocol stack architecture in the first terminal device, the second terminal device, and the first wireless network device and the second wireless network device is as shown in FIG. 4 .
  • the protocol stack architecture shown in Figure 4 is basically the same as the protocol stack architecture shown in Figure 3.
  • the first terminal device accesses the first wireless network device
  • the second terminal device accesses the second wireless network device. Therefore, in the process of transmitting the second data packet to the first terminal device, the second terminal device needs to pass two wireless devices.
  • the network device forwards.
  • the second wireless network device may forward the tunnel through the user plane established between the second wireless network device and the first wireless network device, and carry the adaptation
  • the second data packet of the layer (including the identification information of the first channel) is sent to the first wireless network device, so that the first wireless network device determines the first terminal device according to the destination information included in the adaptation layer carried by the second data packet,
  • the second data packet carrying the adaptation layer is sent to the first terminal device by using the second channel of the second wireless interface.
  • the second wireless network device may be in the GPRS (GPRS is the abbreviation of general packet radio service) tunneling protocol header (GPRS Tunnelling Protocol) of the user plane carrying the second data packet.
  • GPRS general packet radio service
  • the GTP-U header notifying the first wireless network device that the second data packet carries an adaptation layer, and after receiving the notification, the first wireless network device notifies the first terminal device, so that the first terminal device
  • an adaptation layer is configured in the second channel.
  • the first wireless network device may carry the indication information by using an RRC message or Downlink Control Information (DCI), or the RLC header or the MAC sub-header carries the indication information, where the indication information is used to indicate the first terminal.
  • the second channel of the device device is configured with an adaptation layer.
  • the second terminal device can learn that the first channel and the third channel have a mapping relationship by using the possible mode 1 described in the protocol stack architecture of FIG. 3, and details are not described herein again.
  • the second wireless network device may determine, by using the following manner, that the wireless network device that is accessed by the first terminal device is the first wireless network device, so as to determine which wireless network the second data packet received by the second wireless network device is forwarded to.
  • Device The destination node for the second data packet is a single node, that is, a unicast situation.
  • the device may send the wireless network device to the neighboring area.
  • Initiating an inquiry for example, based on the destination information corresponding to the second data packet (eg, the L2 ID of the first terminal device on the first wireless interface, including but not limited to an IP address, a MAC address, a ProSe UE ID, a ProSe Layer 2 group ID, a destination layer 2 ID, platnoon group ID, etc.)
  • the destination information corresponding to the second data packet eg, the L2 ID of the first terminal device on the first wireless interface, including but not limited to an IP address, a MAC address, a ProSe UE ID, a ProSe Layer 2 group ID, a destination layer 2 ID, platnoon group ID, etc.
  • the second wireless network device may determine, according to the L2 ID provided by the first wireless network device, Whether the L2 ID of the first wireless interface corresponding to the second data packet is governed by the first wireless network device.
  • the destination node for the second data packet is a multi-node, that is, a multicast situation
  • the second wireless network device may be based on a service identifier (eg, MBMS session ID, TMGI, etc.) that interacts with the first wireless network device in advance, and the second The service identifier carried by the data packet or the service identifier associated with the wireless data bearer carrying the second data packet (for example, when the wireless data bearer is established, the wireless data bearer and the service identifier are in one-to-one correspondence) are matched.
  • the second wireless network device forwards the second data packet to the first wireless network device, and then the second wireless network device performs multicast according to the service identifier.
  • the third protocol stack architecture the first wireless interface carrying the first channel is a direct wireless interface in which the second terminal device directly communicates with the first terminal device, and the second wireless interface carrying the second channel is a wireless network device and the first A wireless interface for communication between the terminal devices, and a third wireless interface carrying the third channel is a wireless interface for communication between the second terminal device and the wireless network device. Both the first terminal device and the second terminal device belong to the wireless network device.
  • FIG. 5 it is a schematic diagram of a protocol layer architecture in a first terminal device, a second terminal device, and a wireless network device.
  • FIG. 5 only shows a protocol layer related to the embodiment of the present application in the first terminal device, the second terminal device, and the wireless network device.
  • the first terminal device, the second terminal device, and the wireless network device may further include other protocol layers.
  • the application examples are not specifically limited thereto.
  • the first protocol device and the second terminal device in the first terminal device share the same PDCP layer, and the first channel and the third channel in the second terminal device share the same PDCP layer.
  • the same PDCP layer The same PDCP layer.
  • the protocol stack structure shown in FIG. 5 may be applicable to the second possible manner of determining that the first channel and the second channel have a mapping relationship, that is, the first terminal device receives the second configuration information sent by the wireless network device, and the second The configuration information is used to indicate that there is a mapping relationship between the first channel and the second channel.
  • the second configuration information may include a correspondence between the identification information of the first channel (for example, LTE PC5 LCID or NR PC5 LCID) and the identification information of the second channel (for example, LTE Uu LCID/DRB ID, or NR Uu LCID/DRB ID).
  • the third protocol stack can be understood as an improvement to the first protocol stack and the second protocol stack, and the first layer device and the second channel are notified to the first terminal device by means of the wireless network device configuration instead of the adaptation layer. Mapping relations.
  • the method may further include: the first terminal device receiving second configuration information sent by the wireless network device, where the second configuration information is used to indicate that the first channel and the second channel have Mapping relations.
  • the wireless network device that sends the second configuration information is the wireless network device to which the first terminal device and the second terminal device belong;
  • the wireless network device that sends the second configuration information is the first wireless network device that is accessed by the first terminal device.
  • the second wireless network device accessed by the second terminal device may forward the tunnel protocol header through the control plane signaling or through the user plane (for example, the GTP-U protocol) And transmitting, to the first wireless network device, the identifier information, the source information, and the destination information of the first channel, so that the first wireless network device determines the receiving end (the first terminal device) according to the destination information, and then determines that the mapping with the first channel is performed.
  • the second channel of the relationship thereby notifying the first terminal device of the determined mapping relationship between the first channel and the second channel.
  • the second terminal device can learn that the first channel and the third channel have a mapping relationship by using the possible mode 1 described in the protocol stack architecture of FIG. 3, and details are not described herein again.
  • the mapping relationship between the first channel and the second channel is configured by the wireless network device, instead of adding an adaptation layer in the architecture of the protocol stack, which is beneficial to reducing the improvement of the existing protocol stack. Reduce the cost of improving the protocol stack.
  • the protocol stack architecture shown in FIG. 5 is also applicable to the third possible manner of determining that the first channel and the second channel have a mapping relationship, and the convergence identifier carried by the convergence protocol layer of the first data packet and the second data packet.
  • the aggregation protocol layer carries the same aggregation identifier.
  • the aggregation identifier is used to indicate the data bearer to which the data packet carrying the aggregation identifier belongs.
  • the convergence protocol layer is a PDCP layer.
  • the second terminal device obtains the first data packet and the second data packet after performing copy processing on the data packet to be transmitted at the PDCP layer.
  • the PDCP layer of the first data packet includes a first aggregation identifier, where the first convergence identifier is used to indicate a wireless data bearer or a PDCP entity to which the first data packet belongs, and the PDCP layer of the second data packet includes a second convergence. And a second convergence identifier is used to indicate a wireless data bearer or a PDCP entity to which the second data packet belongs. If the first convergence identifier and the second convergence identifier are the same, the first channel has a mapping relationship with the second channel. When the first aggregation identifier and the second convergence identifier are the same, the identifiers of the PDCP layer used for aggregation may be the same, or the same radio bearer identifier (such as a DRB ID).
  • the second terminal device sends the first data packet to the first terminal device through the first channel, and sends the second data packet to the wireless network device by using the third channel, and after receiving the second data packet, the wireless network device passes the PHY/MAC.
  • /RLC layer processing no processing is done on the PDCP layer, that is, the PDCP layer is transparently transmitted to the wireless network device.
  • the second data packet carrying the PDCP layer is sent to the RLC/MAC/PHY layer for processing, and then the second data packet is sent to the first terminal device by using the second channel.
  • the first terminal device After receiving the first data packet and the second data packet, the first terminal device determines that the first convergence identifier carried by the PDCP layer of the first data packet is the same as the second convergence identifier carried by the PDCP layer of the second data packet, thereby Data packets are aggregated at the same PDCP layer.
  • the second terminal device can learn that the first channel and the third channel have a mapping relationship by using the possible mode 1 described in the protocol stack architecture of FIG. 3, and details are not described herein again.
  • the fourth protocol stack architecture the first wireless interface carrying the first channel is a direct wireless interface in which the second terminal device directly communicates with the first terminal device, and the second wireless interface carrying the second channel is a wireless network device and the first A wireless interface for communication between the terminal devices, and a third wireless interface carrying the third channel is a wireless interface for communication between the second terminal device and the wireless network device. Both the first terminal device and the second terminal device belong to the wireless network device.
  • FIG. 6 a schematic diagram of a protocol layer architecture in a first terminal device, a second terminal device, and a wireless network device is shown.
  • FIG. 6 only shows a protocol layer related to the embodiment of the present application in the first terminal device, the second terminal device, and the wireless network device.
  • the first terminal device, the second terminal device, and the wireless network device may further include other protocol layers.
  • the application examples are not specifically limited thereto.
  • an adaptation layer is added to the protocol stack architecture corresponding to the first channel of the direct-connected wireless interface between the first terminal device and the second terminal device, where the adaptation layer can be located in the packet data aggregation.
  • the adaptation layer can be located in the packet data aggregation.
  • PDCP packet data convergence protocol
  • RLC radio link control
  • an adaptation layer is configured between the PDCP layer and the RLC layer of the first channel of the first terminal device and the second terminal device.
  • the first channel and the second channel share the same PDCP layer in the first terminal device, and the first channel and the third channel in the second terminal device share the same PDCP layer.
  • the protocol stack architecture shown in FIG. 6 may be applicable to the fourth possible manner of determining that the first channel and the second channel have a mapping relationship, that is, the adaptation layer of the first data packet carries the identification information of the second channel.
  • the second terminal device obtains the first data packet and the second data packet after performing copy processing on the data packet to be transmitted at the PDCP layer.
  • the second terminal device adds the identification information of the second channel to the first data packet in the adaptation layer of the first channel.
  • the second data packet since the adaptation layer is not configured in the second channel and the third channel, the second data packet does not pass through the adaptation layer, but directly reaches the RLC layer, passes through the RLC layer of the third channel, and the RLC.
  • each entity under the layer is sent to the wireless network device through the third wireless interface, so that the wireless network device is sent to the first terminal device through the second channel of the second wireless interface.
  • the wireless network device determines the identifier information of the second channel of the second wireless interface, Sending the identification information of the second channel to the second terminal device.
  • the wireless network device includes a first wireless network device accessed by the first terminal device and a second wireless network device accessed by the second terminal device. After determining the identifier information of the second channel of the second radio interface, the first radio network device that is accessed by the first terminal device sends the identifier information of the second channel and the address information of the first terminal device to the second terminal device for access. The second wireless network device.
  • the second wireless network device After receiving the identification information of the second channel and the address information of the first terminal device, the second wireless network device, according to the address information of the first terminal device and the association relationship between the first terminal device and the second terminal device retained by the second terminal device, Sending the identifier information of the second channel to the second terminal device corresponding to the first terminal device.
  • the destination information of the first terminal device refer to the corresponding embodiment in FIG. 3, and details are not described herein again.
  • the second terminal device transmits the first data packet carrying the identification information of the second channel to the RLC entity in the RLC layer of the first channel of the second terminal device, and passes through the RLC layer of the first channel and the RLC layer.
  • the first entity device After being processed by each entity, the first entity device sends the first terminal device.
  • the processing of the first data packet and the second data packet under the RLC layer and the RLC layer may be substantially the same as the process of transmitting the data packet in the prior art, and details are not described herein again.
  • the first terminal device After receiving the first data packet by using the first channel, the first terminal device determines that the adaptation layer of the first data packet carries the identifier information of the second channel, thereby determining the first channel and the second channel.
  • the first terminal device transmits the first data packet received through the first channel and the second data packet received through the second channel to the same convergence protocol layer entity for data aggregation processing. That is, data aggregation is performed in the same PDCP layer entity.
  • the first terminal device needs to know the existence of the adaptation layer, so that the first The adaptation layer of the data packet acquires the identification information of the second channel.
  • a method for obtaining the presence of the adaptation layer is that the wireless network device sends the indication information to the first terminal device, where the indication information is used to indicate that the first channel of the first wireless interface of the first terminal device is configured with an adaptation layer.
  • the wireless network device may carry the indication information in the RRC message, or include the indication information in the downlink control information (Downlink Control Information, DCI.
  • the adaptation layer exists in the wireless network device
  • the indication information is carried in the RLC header or the MAC sub-header of the second data packet.
  • the wireless network device can be in the first direction.
  • the terminal device sends the first channel of the first wireless interface
  • the first channel of the first terminal device is configured to have an adaptation layer.
  • the PDCP entity of the first terminal device performs data aggregation on the first data packet and the second data packet, where the first data packet and the second data packet are generated based on the same data packet, that is, the first data packet is the second data packet.
  • the copy of the data packet, or the second data packet is a copy of the first data packet, and the PDCP entity may discard any of the first data packet and the second data packet. If the first data packet and the second data packet are not generated based on the same data packet, that is, the sequence numbers of the first data packet and the second data packet are different, the PDCP entity of the first terminal device pairs the first data packet and the first data packet The second packet is reordered.
  • 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 channel and the second channel are used. The aggregation is performed, and the changes to the existing protocol stack are small. The detailed aggregation process is not described here.
  • the second terminal device can learn that the first channel and the third channel have a mapping relationship by using the possible mode 1 described in the protocol stack architecture of FIG. 3, and details are not described herein again.
  • application layer encryption can be used between the transmitting end and the receiving end. Based on this, the PC5 interface and the Uu interface are not encrypted, or both the PC5 interface and the Uu interface are encrypted, for example, the encryption mechanism of the PC5 port is uniformly used.
  • the protocol can specify whether the PDCP layer of the PC5 interface and the Uu interface needs to be encrypted when the transmitting end transmits the data packet to the receiving end.
  • the wireless network device can configure the sender and the receiver through the RRC message, whether the PDCP layer of the two interfaces needs to be encrypted or decrypted, for example, the PDCP layer security switch of the UE granularity or DRB granularity, or the PDCP guarantee switch (completed) Refers to data integrity protection) and PDCP layer encryption switch.
  • the switch (safety switch or maintenance switch or encryption switch) can be indicated by 0 or 1, for example, 0 means not turned on, 1 means off, and vice versa.
  • the switch may also carry the indication information when the switch is turned on (used to indicate that the switch is in an open state), and does not carry the indication information when the switch is not turned on.
  • the PDCP layer is generally not encrypted.
  • the LTE-Uu interface uses the existing air interface security mechanism, that is, PDCP layer encryption. That is to say, when the data packet is transmitted by using the PC5 interface + Uu interface, the security mechanisms of the channels corresponding to the two interfaces may be different.
  • an additional protocol layer is added to the PDCP layer, and the protocol layer may be referred to as an aggregation layer or a convergence layer. Specifically limited. The following describes the protocol stack architecture for increasing the aggregation layer.
  • the new aggregation layer has the following functions: 1) For the sender, add the aggregation layer protocol header, which contains the aggregation layer sequence number; 2) For the sender, after adding the aggregation layer protocol header, the data packet is Copy (optional function); 3) For the sender, the processed packets are sent to one or more associated PDCP entities. In particular, if the copy processing is experienced, the sender sends the data packets with the same SN number to two or more associated PDCP entities respectively; 4) For the receiving end, the received data packets are reordered. Function; 5) For the receiving end, repeat packet detection function for the received data packet. When a packet of a specific SN number is repeatedly generated, the recurring packet is deleted, and only one packet corresponding to the SN number is reserved.
  • the fifth protocol stack architecture can be understood as an improvement to the first protocol stack architecture.
  • the first terminal device and the second terminal device both add an aggregation layer for data offload aggregation.
  • the fifth protocol stack architecture differs from the first protocol stack architecture in that the adaptation layer can be located above the PDCP layer.
  • the adaptation layer can be located above the PDCP layer.
  • an adaptation layer is configured on the PDCP layer of the second channel of the first terminal device and the wireless network device, and the PDCP layer of the third channel of the second terminal device and the wireless network device is configured.
  • An adaptation layer is configured on both.
  • the first channel and the second channel share the same aggregation layer in the first terminal device, and the aggregation layer is newly added on the basis of the original protocol stack, and the first channel and the third channel in the second terminal device also share the same convergence.
  • the convergence layer is located above the adaptation layer.
  • the aggregation layer is located above the PDCP layer.
  • the aggregation layer is located between the Service Data Adaptation Protocol (SDAP) layer and the PDCP layer.
  • SDAP Service Data Adaptation Protocol
  • the aggregation protocol layer responsible for traffic distribution data is no longer the PDCP layer, but is implemented by a new aggregation layer.
  • the aggregation layer is configured to carry specific functions, and the function of copying data packets is added at the aggregation layer of the transmitting end, and the copied or unreplicated data packets are distributed through different channels; and the function of converging data packets is added at the convergence layer of the receiving end. .
  • the fifth protocol stack architecture shown in FIG. 7 is also applicable to the first possible manner of determining that the first channel and the second channel have a mapping relationship, and the adaptation layer of the second data packet carries the first channel. Identification information.
  • the second terminal device obtains the first data packet and the second data packet after performing the copy processing on the data packet to be sent at the aggregation layer.
  • the second terminal device adds the identification information of the first channel to the second data packet in the adaptation layer of the second channel.
  • the second terminal device may further add source information, destination information, to the second data packet in the adaptation layer of the second channel.
  • the second terminal device transmits the second data packet carrying the identification information of the first channel to the PDCP layer entity in the PDCP layer of the third channel of the second terminal device, and passes through the PDCP layer of the third channel and the PDCP layer. After processing by each entity, it is sent to the wireless network device through the third wireless interface.
  • the processing of the first data packet and the second data packet under the PDCP layer and the PDCP layer may be substantially the same as the process of transmitting the data packet in the prior art, and details are not described herein again.
  • the wireless network device After receiving the second data packet by using the third channel that is carried by the third wireless interface, the wireless network device determines, according to the destination information carried by the adaptation layer in the wireless network device, the first terminal device of the second data packet, Thereby determining a second channel in which the wireless network device communicates with the first terminal device.
  • the wireless network device sends the second data packet carrying the identification information of the first channel to the first terminal device.
  • the wireless network device After determining the second channel in which the wireless network device communicates with the first terminal device, after determining the first terminal device according to the destination information, the wireless network device determines a mapping relationship between the first channel and the second channel, thereby Obtaining a second channel in which the wireless network device communicates with the first terminal device.
  • the first terminal device After receiving the second data packet by using the second channel, the first terminal device determines that the adaptation layer of the second data packet carries the identifier information of the first channel, thereby determining the first channel and the second channel.
  • the first terminal device transmits the first data packet received through the first channel and the second data packet received through the second channel to the same convergence protocol layer entity for data aggregation processing. That is, data aggregation is performed at the same aggregation layer entity.
  • the identification information of the first channel may also be carried by other means, for example, by the MAC subheader of the third channel.
  • the MAC subheader of the original third channel carries the logical channel identifier of the third channel.
  • the mapping between the first channel and the third channel is determined by additionally adding the identification information of the first channel to the MAC sub-header of the third channel.
  • the wireless network device determines the mapping relationship between the first channel and the second channel.
  • the identification information of the first channel is added in the MAC subheader of the second channel.
  • the receiving end determines that the first channel and the second channel have a mapping relationship according to the logical channel identifier of the second channel carried by the MAC sub-header of the second channel and the identifier information of the first channel.
  • the sixth protocol stack architecture is basically the same as the fifth protocol stack architecture shown in FIG. 7.
  • the fifth protocol stack is different in that the second terminal device forwards the second data packet to the first terminal device through the third channel and the second channel, and forwards the second wireless network device and the first wireless network device.
  • the second terminal device forwards the second data packet to the first terminal device through the third channel and the second channel, and forwards the second wireless network device and the first wireless network device.
  • the seventh protocol stack architecture can be understood as an improvement to the third protocol stack architecture in which an aggregation layer is added to the first terminal device and the second terminal device.
  • the convergence layer is located above the PDCP layer.
  • the first channel and the second channel share the same convergence layer in the first terminal device, and the first channel and the third channel in the second terminal device share the same convergence layer.
  • the seventh protocol stack architecture shown in FIG. 9 may be applicable to the second possible manner of determining that the first channel and the second channel have a mapping relationship, that is, the first terminal device receives configuration information sent by the wireless network device, and the configuration is The information is used to indicate that there is a mapping relationship between the first channel and the second channel.
  • the configuration information may include a correspondence between the identifier information of the first channel and the identifier information of the second channel.
  • FIG. 9 only shows the protocol stack architecture in the first terminal device and the second terminal device. Since the protocol stack architecture of the wireless network device in the seventh protocol stack architecture is the same as the existing protocol stack architecture, Let me repeat.
  • the only difference between the seventh protocol stack architecture shown in FIG. 9 and the third protocol stack architecture shown in FIG. 5 is that the second terminal device performs replication and/or offload processing on the newly transmitted aggregation packet. And the first terminal device performs data aggregation processing on the first data packet and the second data packet at the newly added aggregation layer, and the other processing methods are similar to the processing method in the third protocol stack architecture shown in FIG. 5, where I won't go into details here.
  • the eighth protocol stack architecture can be understood as an improvement to the fourth protocol stack architecture, where the aggregation is increased in the first terminal device and the second terminal device.
  • Floor The convergence layer is located above the PDCP layer.
  • the first channel and the second channel share the same convergence layer in the first terminal device, and the first channel and the third channel in the second terminal device share the same convergence layer.
  • the eighth protocol stack architecture shown in FIG. 10A can also be applied to the fourth possible manner of determining that the first channel and the second channel have a mapping relationship.
  • the only difference between the eighth protocol stack architecture shown in FIG. 10A and the fourth protocol stack architecture shown in FIG. 6 is that the second terminal device performs replication and/or offload processing on the newly transmitted aggregation packet. And the first terminal device performs data aggregation processing on the first data packet and the second data packet in the newly added aggregation layer, and the other processing methods are similar to the processing method in the fourth protocol stack architecture shown in FIG. I won't go into details here.
  • the air interface may only include the RLC/MAC/PHY protocol layer, and does not need to include the PDCP layer.
  • the PDCP protocol layer is not included between the first terminal device and the wireless network device (or the first wireless network device).
  • the adaptation layer added by the protocol stack may be transparently transmitted to the wireless network device. That is, the adaptation layer exists only on the first terminal device and the second terminal device.
  • the adaptation layer may not be configured on the wireless network device, as shown in FIG. 10B, between the second terminal device and the wireless network device, the first terminal device, and the wireless network. There is no adaptation layer between the devices (or the first wireless network device).
  • the protocol stack architecture shown in FIG. 4 or FIG. 7 or FIG. 8 is also applicable, and details are not described herein again.
  • the first wireless interface is a direct connection port
  • the second wireless interface is a non-directly connected wireless interface.
  • the first wireless interface and the second wireless interface may be directly connected wireless interfaces, for example, the first wireless interface is a direct wireless interface in the LTE system, and the second wireless interface is a straight in the NR system. With wireless interface.
  • the protocol stack architecture corresponding to the channels carried on the two interfaces is the same.
  • FIG. 11 is a schematic block diagram of a ninth protocol stack architecture of an embodiment of the present application, where two wireless interfaces are direct wireless interfaces.
  • An adaptation layer is added to the protocol stack architecture corresponding to the channel of one of the wireless interfaces, and the adaptation layer is located between the PDCP layer and the RLC layer.
  • an adaptation layer is added to the protocol stack structure corresponding to the first channel of the first radio interface as an example.
  • the first channel and the second channel in the first terminal device and the second terminal device share the same PDCP layer.
  • the protocol stack structure shown in FIG. 11 may be applicable to the first possible manner of determining that the first channel and the second channel have a mapping relationship, and the adaptation layer of the first data packet on the first channel carries the second Identification information of the channel.
  • the identification information of the first channel may be carried in the adaptation layer of the second data packet of the second channel.
  • the second terminal device obtains the first data packet and the second data packet after performing copy processing on the data packet to be transmitted at the PDCP layer.
  • the second terminal device adds the identification information of the second channel to the first data packet in the adaptation layer of the first channel. For the second data packet, since the adaptation layer is not configured in the second channel, the second data packet does not pass through the adaptation layer, but directly reaches the RLC layer, passes through the RLC layer of the second channel and under the RLC layer. After being processed by each entity, it is sent to the first terminal device through the second wireless interface.
  • the second terminal device transmits the first data packet carrying the identification information of the second channel to the RLC entity in the RLC layer of the first channel of the second terminal device, and passes through the RLC layer of the first channel and the RLC layer.
  • the first entity device After being processed by each entity, the first entity device sends the first terminal device.
  • the processing of the first data packet and the second data packet under the RLC layer and the RLC layer is substantially the same as the process of transmitting the data packet in the prior art, and details are not described herein again.
  • the first terminal device After receiving the first data packet by using the first channel, and receiving the second data packet by using the second channel, the first terminal device determines that the identifier information of the second channel is carried in the adaptation layer of the first data packet, thereby Determining a mapping relationship between the first channel and the second channel, where the first terminal device receives the first data packet received through the first channel and the second data packet received through the second channel Data is transmitted to the same aggregation protocol layer entity for data aggregation, that is, data aggregation is performed on the same PDCP layer entity.
  • the first terminal device needs to know the existence of the adaptation layer, so that the first The adaptation layer of the data packet acquires the identification information of the second channel.
  • the method includes: the wireless network device sends the indication information to the first terminal device, where the indication information is used to indicate that the first channel of the first wireless interface of the first terminal device is configured with an adaptation layer.
  • the wireless network device may carry the indication information in the RRC message, or include the indication information in Downlink Control Information (DCI), or the second terminal device directly in the physical bypass control channel (Physical Sidelink)
  • DCI Downlink Control Information
  • SCI bypass control information
  • the PDCP entity of the first terminal device performs data aggregation on the first data packet and the second data packet, where the first data packet and the second data packet are generated based on the same data packet, that is, the first data packet is the second data packet.
  • the copy of the data packet, or the second data packet is a copy of the first data packet, and the PDCP entity may discard any of the first data packet and the second data packet. If the first data packet and the second data packet are not generated based on the same data packet, that is, the sequence numbers of the first data packet and the second data packet are different, the PDCP entity of the first terminal device pairs the first data packet and the first data packet The second packet is reordered.
  • 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 channel and the second channel are used. The aggregation is performed, and the changes to the existing protocol stack are small. The detailed aggregation process is not described here.
  • the second terminal device may learn that the first channel and the second channel have a mapping relationship by using the possible mode 1 or the possible mode 2 in the protocol stack architecture described in FIG. 3, and details are not described herein again. .
  • FIG. 12 is a schematic block diagram of a tenth protocol stack architecture of the embodiment of the present application.
  • the tenth protocol stack architecture can be understood as an improvement to the ninth protocol stack architecture.
  • the tenth protocol stack architecture is different from the ninth protocol stack architecture in that the adaptation layer can be located on the PDCP layer, and the first channel and the second channel in the first terminal device and the second terminal device share the same convergence.
  • Layer, the aggregation layer is added on the basis of the original protocol stack.
  • the convergence layer is located above the adaptation layer.
  • the aggregation layer is located above the PDCP layer.
  • the convergence layer is located between the SDAP layer and the PDCP layer.
  • the NR system is taken as an example in FIG.
  • the aggregation protocol layer responsible for offloading the aggregated data is no longer the PDCP layer, but is implemented by a new aggregation layer. The process of sending data packets through two channels will not be described here.
  • FIG. 13 is a schematic block diagram showing an eleventh protocol stack architecture of the embodiment of the present application.
  • the protocol stack corresponding to the first channel of the first wireless interface and the second wireless interface are The protocol stack corresponding to the second channel has the same architecture as the protocol stack corresponding to the first channel in the ninth protocol stack architecture shown in FIG.
  • the protocol stack structure shown in FIG. 13 may be applicable to the third possible manner of determining that the first channel and the second channel have a mapping relationship, and the adaptation layer of the first data packet on the first channel carries the first convergence identifier.
  • the adaptation layer of the second data packet on the second channel carries the second aggregation identifier, where the convergence identifier is used to indicate the data bearer to which the data packet carrying the convergence identifier belongs.
  • the convergence protocol layer is a PDCP layer. It can be seen that, in the protocol stack architecture shown in FIG. 13 , the protocol stack corresponding to the first channel of the first wireless interface and the protocol stack corresponding to the second channel of the second wireless interface are the first in the fourth protocol stack architecture.
  • the protocol stack corresponding to the first channel of the wireless interface has the same architecture. For a specific data packet transmission process, refer to the process of transmitting a data packet through the first channel of the first radio interface in the tenth protocol stack architecture, and details are not described herein again.
  • FIG. 14 shows a schematic block diagram of a twelfth protocol stack architecture of the present application.
  • the twelfth protocol stack architecture can be understood as an improvement to the eleventh protocol stack architecture.
  • the twelfth protocol stack architecture is different from the eleventh protocol stack architecture in that the adaptation layer can be located on the PDCP layer, and the first channel and the second channel in the first terminal device and the second terminal device are shared. The same aggregation layer, the aggregation layer is added on the basis of the original protocol stack.
  • the convergence layer is located above the adaptation layer.
  • the convergence layer is located above the PDCP layer.
  • the convergence layer is located between the SDAP layer and the PDCP layer.
  • the NR system is taken as an example in FIG.
  • the aggregation protocol layer responsible for offloading the aggregated data is no longer the PDCP layer, but is implemented by a new aggregation layer.
  • the process of sending data packets through two channels will not be described here. It can be seen that, in the protocol stack architecture shown in FIG. 14, the protocol stack corresponding to the first channel of the first wireless interface and the protocol stack corresponding to the second channel of the second wireless interface are the first in the tenth protocol stack architecture.
  • the protocol stack corresponding to the first channel of the wireless interface has the same architecture.
  • For a specific data packet transmission process refer to the process of transmitting a data packet through the first channel of the first radio interface in the tenth protocol stack architecture, and details are not described herein again.
  • the second terminal device needs to send a data packet that needs to be aggregated to the first terminal device through multiple channels, and one mode is indicated by the wireless network device to the second terminal device, and the second terminal device is turned on when receiving the indication, and the other One way is by the second terminal device to decide when to start.
  • the second terminal device is notified by the wireless network device, and the specific process includes the following:
  • a dual connection indication sent by the wireless network device to the second terminal where the dual connection indication is used to instruct the second terminal device to send the data packet that needs to be aggregated to the first terminal device by using multiple channels.
  • the second terminal device After receiving the dual connectivity indication, the second terminal device sends the first data packet to the first terminal device through the first channel, and sends the second data packet to the first terminal device through the second channel (or the third channel).
  • the mapping between the first channel and the second channel (or the first channel and the third channel) may adopt the foregoing possible mode 1 and possible mode 2, and details are not described herein again.
  • the wireless network device may send the first configuration information and the dual connectivity indication to the second terminal device by using a message, where the first configuration information is used to indicate that the first channel and the third channel have a mapping relationship.
  • the first configuration information and the dual connectivity indication may also be sent to the second terminal device through different messages.
  • the wireless network device combines the first configuration information and the dual-connection indication into one piece of information, that is, the first configuration information is sent to indicate that the second terminal device can send the data packet that needs to be aggregated to the first terminal device through multiple channels.
  • the corresponding DRB ID or the aggregation layer identifier or the PDCP layer identifier is used regardless of the LCID of the Uu interface or the LCID of the PC5 interface.
  • the LCID of the Uu interface, the LCID of the PC5 interface, and the same DRB ID or the aggregation layer identifier or the PDCP layer identifier on the other hand, the channel indicating the LCID identifier of the Uu interface and the channel identified by the LCID of the PC5 interface have a mapping relationship. Indicates a double connection.
  • the first configuration information includes a Uu interface LCID and a corresponding DRB identifier (served Radio bearer), an LCID of the PC5 interface, and a corresponding served Radio bearer. If the two correspond to the same DRB identifier, the dual connection is indicated on the one hand, and the LCID of the Uu interface and the LCID of the PC5 interface are mapped on the other hand.
  • DRB identifier serving Radio bearer
  • the dual connection is indicated on the one hand, and the LCID of the Uu interface and the LCID of the PC5 interface are mapped on the other hand.
  • the first configuration information includes the LCID of the Uu interface and the LCID of the PC5 interface (or the LCID list of the PC5 interface).
  • the LCID of the Uu interface has a corresponding DRB ID or an aggregation layer identifier or a PDCP layer identifier.
  • the connection indicates that the LCID of the Uu interface and the LCID of the PC5 interface have a corresponding relationship.
  • the first configuration information includes an LCID of the Uu interface, a PC5 interface LCID, and a served Radio bearer (DRB identifier).
  • the wireless network device may only send a dual connection indication to the second terminal device, and then the second terminal device determines the PC5.
  • the channel has a mapping relationship with the channel of the Uu interface.
  • the wireless network device may also send the first configuration information and/or the dual connection indication in the foregoing manner, and details are not described herein again.
  • the wireless network device may send the dual connectivity indication to the second terminal device by means of an RRC message or a broadcast.
  • the wireless network device sends a dual connectivity indication to the second terminal device when the at least one parameter reported by the second terminal device meets the preset rule.
  • the preset rule includes, but is not limited to, at least one of the following 1) to 7), and specifically may be any one of the following 1) to 7), or any two, or any three, or any four , or any five, or any six, or seven items, or may be other rules.
  • PPPP ProSe Packet Priority
  • the ProSe Per-Packet Reliability (PPPR) corresponding to the data packet currently transmitted by the second terminal device is less than a second threshold
  • CBR channel busy ratio
  • the CBR of one of the interfaces currently not used by the second terminal device is less than a fourth threshold
  • the signal strength of the currently adopted interface of the second terminal device is less than a fifth threshold
  • the signal strength of one of the interfaces of the second terminal device that is not used is higher than a sixth threshold
  • the number of to-be-transmitted data packets of one of the second terminal device or the second terminal device is greater than a seventh threshold.
  • the wireless network device may send a close dual connectivity indication to the second terminal device when determining that the second terminal device does not meet the preset rule. For example, when the preset rule includes one of the foregoing, if it is determined that the second terminal device does not satisfy the condition in the item, the second dual terminal connection indication is sent to the second terminal device, and the preset rule includes the foregoing two items. When it is determined that the second terminal device does not satisfy any one of the two items, sending a dual dual connection indication to the second terminal device, or determining that the second terminal device does not satisfy the two conditions, The second terminal device sends a close dual connection indication.
  • the specific process includes the following:
  • the wireless network device can be pre-configured to the second terminal device dual connection opening rule, so that when the second terminal device determines that the dual connection opening rule is met, the second terminal device opens the data packet that needs to be aggregated to the first terminal device through multiple channels.
  • the wireless network device determines a dual-connection open rule; the wireless network device sends the dual-connection open rule to the second terminal device, where the dual-connection open rule is used to indicate that the second terminal device is determined to be satisfied
  • the dual-connection open rule is used to indicate that the second terminal device is determined to be satisfied
  • the data packet that needs to be aggregated is sent to the first terminal device through two channels.
  • the dual connection opening rule includes any one or any of the following:
  • the short-distance service packet priority PPPP corresponding to the data packet currently transmitted by the second terminal device is smaller than the first threshold
  • the short-distance service packet reliability PPPR corresponding to the data packet currently transmitted by the second terminal device is less than a second threshold
  • the channel busy ratio CBR of the currently adopted interface of the second terminal device is greater than a third threshold
  • the channel busy ratio CBR of one of the interfaces currently not used by the second terminal device is less than a fourth threshold
  • the signal strength of the currently adopted interface of the second terminal device is less than a fifth threshold
  • the signal strength of one of the interfaces currently not used by the second terminal device is higher than a sixth threshold
  • the number of to-be-transmitted data packets of one of the second terminal device or the second terminal device is greater than a seventh threshold.
  • the wireless network device may also be pre-configured to the second terminal device dual-connection closing rule, so that after the second terminal device determines that the dual-connection closing rule is met after the dual-connection is enabled, the dual-connection is closed.
  • the double-connection closing rule may correspond to the dual-connection opening rule.
  • the dual-connection opening rule includes one of the above
  • the dual connection is closed, for example, in the double
  • the connection rule includes two of the above
  • the dual connection indication is turned off, or the second terminal device determines that the conditions of the two items are not met. Sending a close dual connection indication to the second terminal device.
  • the second terminal device may Determine which channel of the PC5 interface is bound to which channel of the Uu interface.
  • the second terminal device can also determine which channel of the LTE PC5 interface and which channel of the NR PC5 interface are bound when determining to initiate the dual connection. For example, determining that the signal strength of the currently used interface is less than the fifth threshold, and the signal strength of the unused interface is higher than the sixth threshold, so that the second terminal device can determine one of the currently adopted interfaces and the unused one.
  • One of the channels of an interface has a mapping relationship.
  • the CBR of the interface currently used by the second terminal device is greater than the third threshold, and the CBR of the interface that is not currently used by the second terminal device is less than the fourth threshold, so that the second terminal device can determine One of the currently adopted interfaces has a mapping relationship with a certain channel of an unused interface.
  • the channels corresponding to the two wireless interfaces have a mapping relationship.
  • the two communication interfaces between the second terminal device and the first terminal device are a direct wireless interface and an indirect wireless interface, respectively, the third protocol stack architecture shown in FIG. 3 may be adopted.
  • the processing manner described may also adopt the processing manner described in the third protocol stack architecture shown in FIG. 5, adopt the processing manner described in the fifth protocol stack architecture shown in FIG. 7, or adopt the processing manner shown in FIG.
  • the processing described in the seventh protocol stack architecture If the two communication interfaces between the second terminal device and the first terminal device are directly connected wireless interfaces, the processing manner described in the ninth protocol stack structure shown in FIG. 11 may be adopted, or the method described in FIG. 12 may be used.
  • the processing described by the tenth protocol stack architecture. I will not repeat them here.
  • the second terminal device when the second terminal device sends the data packet that needs to be aggregated to the first terminal device by using multiple channels, the second terminal device may obtain the transmission resource corresponding to the multiple channels, for example, the channel for the PC5 interface.
  • the acquisition of the transmission resource if the mode adopted by the second terminal device is mode 3, and the mode 3 refers to the wireless network device supporting the terminal device to apply for the transmission resource, the second terminal device may separately apply to the LTE standard wireless network device/NR system. Wireless network device application. If the mode adopted by the second terminal device is mode 4, the mode 4 indicates that the wireless network device does not support the terminal device to apply for the transmission resource, so the terminal device needs to select the transmission resource by itself, and the second terminal device can be in the LTE system and the NR system.
  • the resource pool (resource pool) provided by the wireless network device separately selects the transmission resource. Or when the second terminal device adopts the mode 3 in one system and the mode 4 in the other system.
  • the second terminal device is mode3 in the LTE system and mode4 in the NR system.
  • the second terminal device may apply for transmission resources to the LTE system, and select the resource pool provided by the wireless network device in the NR system.
  • the present application further provides a communication device 500, which may include a transceiver unit 1501 and a processing unit 1502.
  • the communication device 1500 is applicable to the first terminal device, and the transceiver unit 1501 is configured to receive the first data packet and the second data from the second terminal device by using the first channel and the second channel.
  • the communication device 1500 is applicable to the second terminal device, and the processing unit 1502 is configured to generate a data packet and add information in a corresponding layer of the data packet, which may be used to implement the foregoing FIG.
  • the communication device 1500 is applicable to a wireless network device
  • the transceiver unit 1501 is configured to receive a second data packet from the second terminal device
  • the processing unit 1502 is configured to process the second data packet
  • the processing unit 1502 processes the second data packet, and then sends the second data packet to the first terminal device through the transceiver unit 1501.
  • a communication device 1600 provided by the present application.
  • the communication device 1600 can be applied to the first terminal device, and the specific communication device 1600 can be the first terminal device, or can be a device capable of supporting the first terminal device to implement the function of the first terminal device in the method of FIG. 2-14.
  • the communication device 1600 can be applied to the second terminal device, and the specific communication device 1600 can be the second terminal device, or can be a device capable of supporting the second terminal device to implement the function of the second terminal device in the method of FIG. 2-14. .
  • the communication device 1600 can be applied to a wireless network device, and the specific communication device 1600 can be a wireless network device (or a first wireless network device or a second wireless network device), or can support the wireless network device to implement FIG. 2 to FIG. A method of functioning a wireless network device.
  • communication device 1600 can be a chip or chip system.
  • the chip system may be composed of a chip, and may also include a chip and other discrete devices.
  • the communication device 1600 includes at least one processor 1610 for implementing the functions of the first terminal device or the second terminal device or the wireless network device in the communication method provided by the embodiment of the present application.
  • the apparatus can also include at least one memory 1620 for storing program instructions and/or data.
  • Memory 1620 is coupled to processor 1610.
  • the coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units or modules, and may be in an electrical, mechanical or other form for information interaction between devices, units or modules.
  • Processor 1610 may operate in conjunction with memory 1620.
  • Processor 1610 may execute program instructions stored in memory 1620.
  • at least one of the at least one memory 1620 can be included in the processor 1610.
  • the communication device 1600 can also include a communication interface 1630 through which the communication device 1600 can interact with other devices.
  • Communication interface 1630 can be a circuit, bus, transceiver, or any other device that can be used to interact with information.
  • connection medium between the communication interface 1630, the processor 1610, and the memory 1620 is not limited in the embodiment of the present application.
  • the embodiment of the present application is connected by a bus between the memory 1620, the processor 1610, and the communication interface 1630 in FIG. 16, and the bus is indicated by a thick line in FIG. 16, and the connection manner between other components is only schematically illustrated. Not limited to limits.
  • the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 16, but it does not mean that there is only one bus or one type of bus.
  • the processor may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or a transistor logic device, a discrete hardware component, or may be implemented or The methods, steps, and logical block diagrams disclosed in the embodiments of the present application are performed.
  • a general purpose processor can be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the memory may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), or may be a volatile memory, such as Random-access memory (RAM).
  • the memory may also be any other medium that can be used to carry or store the desired program code in the form of an instruction or data structure and can be accessed by a computer, but is not limited thereto.
  • the memory in the embodiment of the present application may also be a circuit or any other device capable of implementing a storage function for storing program instructions and/or data.
  • the embodiment of the present invention further provides a schematic structural diagram of a wireless network device, such as a base station.
  • the base station can be applied to the scenario of the communication system as shown in FIG.
  • the base station 1700 includes one or more radio frequency units, such as a remote radio unit (RRU) 1701 and one or more baseband units (BBUs) (also referred to as digital units, DUs) 1702. .
  • the RRU 1701 may be referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., which may include at least one antenna 17011 and a radio frequency unit 17012.
  • the RRU 1701 portion can be used for transceiving radio frequency signals and converting radio frequency signals with baseband signals, for example, for transmitting signaling indications and/or reference signals described in the above embodiments to a terminal device.
  • the BBU 1702 portion can be used for baseband processing, base station control, and the like.
  • the RRU 1701 and the BBU 1702 may be physically disposed together or physically separated, that is, distributed base stations.
  • the BBU 1702 is a control center of a base station, which may also be referred to as a processing unit, and can be used to perform baseband processing functions such as channel coding, multiplexing, modulation, spread spectrum, and the like.
  • the BBU processing unit
  • the BBU can be used to control the method by which the base station performs the wireless network device execution shown in any of Figures 2-14.
  • the BBU 1702 may be configured by one or more boards, and multiple boards may jointly support a single access standard radio access network (such as an LTE network), or may support different access modes of the wireless connection. Network access.
  • the BBU 1702 also includes a memory 17021 and a processor 17022.
  • the memory 17021 is used to store the necessary instructions and data.
  • the memory 17021 stores the correspondence between the information of the transmission delay difference and the transmission delay difference in the above embodiment.
  • the processor 17022 is configured to control the base station to perform necessary actions.
  • the memory 17021 and the processor 17022 can serve one or more boards. That is, the memory and processor can be individually set on each board. It is also possible that multiple boards share the same memory and processor.
  • the necessary circuits can be set on each board.
  • FIG. 18 provides a schematic structural diagram of a terminal device, and FIG. 18 exemplifies a communication device in a vehicle.
  • FIG. 18 shows only the main components of the terminal device.
  • the terminal device 1800 can be applied to the first terminal device or the second terminal device described in any of the foregoing embodiments of the present application.
  • the terminal device 1800 can include a processor, a memory, a control circuit, and optionally, an antenna and/or an input and output device.
  • the processor can be used to process communication protocols and communication data, as well as to control terminal devices, execute software programs, and process data of software programs.
  • the memory can be used to store software programs and/or data.
  • the control circuit can be used for the conversion of baseband signals and radio frequency signals as well as the processing of radio frequency signals.
  • the control circuit together with the antenna can also be called a transceiver, which can be used to transmit and receive RF signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, keyboards, etc., can be used to receive data input by the user and output data to the user.
  • the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program.
  • the processor performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal, and then sends the radio frequency signal to the outside through the antenna in the form of electromagnetic waves.
  • the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes the data.
  • FIG. 18 shows only one memory and processor for ease of illustration. In an actual terminal device, there may be multiple processors and memories.
  • the memory may also be referred to as a storage medium or a storage device, and the like.
  • the processor may include a baseband processor and a central processing unit, the baseband processor may be configured to process the communication protocol and the communication data, and the central processor may be used to control the entire terminal device and execute the software program. , processing data from software programs.
  • the processor in FIG. 18 integrates the functions of the baseband processor and the central processing unit.
  • the baseband processor and the central processing unit can also be independent processors and interconnected by technologies such as a bus.
  • the terminal device may include a plurality of baseband processors to accommodate different network standards, and the terminal device may include a plurality of central processors to enhance its processing capabilities, and various components of the terminal devices may be connected through various buses.
  • the baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip.
  • the central processing unit can also be expressed as a central processing circuit or a central processing chip.
  • the functions of processing the communication protocol and the communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to implement the baseband processing function.
  • an antenna and control circuit having a transceiving function can be regarded as a transceiving unit 1801 of the terminal device 1800, and a processor having a processing function can be regarded as a processing unit 1802 of the terminal device 1800.
  • the terminal device 1800 may include a transceiving unit 1801 and a processing unit 1802.
  • the transceiver unit can also be referred to as a transceiver, a transceiver, a transceiver, and the like.
  • the device for implementing the receiving function in the transceiver unit 1801 can be regarded as a receiving unit, and the device for implementing the sending function in the transceiver unit 1801 is regarded as a sending unit, that is, the transceiver unit 1801 includes a receiving unit and a sending unit.
  • the receiving unit may also be referred to as a receiver, a receiver, a receiving circuit, etc.
  • the transmitting unit may be referred to as a transmitter, a transmitter, or a transmitting circuit.
  • the embodiment of the present invention further provides a communication system, which includes one or more of the foregoing first terminal device, second terminal device, and wireless network device.
  • the embodiment of the present application further provides a computer storage medium, where the software program stores a software program, and the software program can implement any one or more of the foregoing when being read and executed by one or more processors.
  • the computer storage medium may include various media that can store program codes, such as a USB flash drive, a removable hard disk, a read only memory, a random access memory, a magnetic disk, or an optical disk.
  • the embodiment of the present application further provides a chip, where the chip includes a processor, for implementing functions related to any one or more of the foregoing embodiments, for example, acquiring or processing information involved in the foregoing method or Message.
  • the chip further includes a memory for the processor to execute necessary program instructions and data.
  • the chip can be composed of a chip, and can also include a chip and other discrete devices.
  • embodiments of the present application can be provided as a method, system, or computer program product.
  • the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware.
  • the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

本申请提供一种通信方法及装置，实现接收端能够获知通过哪几个接口的通道接收到的数据包需要汇聚。方法包括：第一终端设备通过第一通道接收由第二终端设备发送的第一数据包，第一通道承载在第一无线接口，第一无线接口为第二终端设备和第一终端设备直接通信的无线通信接口；第一终端设备通过第二通道接收由第二终端设备发送的第二数据包，第二通道承载在第二无线接口，第二无线接口为无线网络设备与第一终端设备通信的通信接口，或者第二无线接口为第二终端设备和第一终端设备直接通信的另一无线通信接口；其中，第一通道与第二通道具有映射关系；第一终端设备根据映射关系将第一数据包与第二数据包传输至同一汇聚协议层实体进行数据汇聚处理。

Description

一种通信方法及装置
本申请要求在2018年05月17日提交中国专利局、申请号为201810476295.8、发明名称为“一种通信方法及装置”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
本申请涉及通信技术领域，尤其涉及一种通信方法及装置。
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。
在车联网等其他通信系统中，两个终端设备间可以直接通过直连无线接口进行数据包的传输，而无需网络设备的参与。为了提高数据包的传输性能，两个终端设备间可以将数据包复制或者将数据包拆分，然后通过多个接口传输。但是接收端如何获知通过多个接口接收到的数据包需要汇聚，即对来自多个接口的多个数据包进行重排序或者去重，有待研究。
发明内容
本申请提供一种通信方法及装置，实现接收端能够获知通过哪几个接口的通道接收到的数据包需要汇聚。
第一方面，本申请实施例提供了一种通信方法，包括：第一终端设备通过第一通道接收由第二终端设备发送的第一数据包，所述第一通道承载在第一无线接口，所述第一无线接口为所述第二终端设备和所述第一终端设备直接通信的无线通信接口；所述第一终端设备通过第二通道接收由所述第二终端设备发送的第二数据包，所述第二通道承载在第二无线接口，所述第二无线接口为无线网络设备与所述第一终端设备通信的通信接口，或者所述第二无线接口为所述第二终端设备和所述第一终端设备直接通信的另一无线通信接口；其中，所述第一通道与所述第二通道具有映射关系；所述第一终端设备根据所述映射关系将所述第一数据包与所述第二数据包传输至同一汇聚协议层实体进行数据汇聚处理。
在本申请实施例中，第一终端设备获知到第一通道和第二通道具有映射关系，而映射关系指示由第一通道接收的数据包和由第二通道接收的数据包需要汇聚在同一汇聚协议层实体，从而第一终端设备能够确定通过第一通道接收到的数据包和通过第二通道接收到的数据包需要汇聚在同一汇聚协议层实体，进而执行数据汇聚处理。在本申请实施例中，虽然分别通过两个不同的通道进行传输，但是最终汇聚在第一终端设备的同一汇聚协议层实体。
在一种可能的设计中，通过如下方式确定所述第一通道与所述第二通道具有映射关系：
若通过所述第二通道接收的所述第二数据包携带所述第一通道的标识信息，则确定所述第一通道与所述第二通道具有映射关系。
上述设计，通过在第二通道携带第一通道的标识信息，从而第一终端设备获知该两个通道之间具有映射关系，进而能够将通过该两个通道接收到的数据包进行数据汇聚处理。
在一种可能的设计中，所述第一终端设备的第二通道配置有第一适配层，所述第一适配层位于所述第二通道的分组数据汇聚协议PDCP层之上，或者所述第一适配层位于第二通道的分组数据汇聚协议PDCP层和无线链路控制协议RLC层之间；所述第二数据包的所述第一适配层携带所述第一通道的标识信息。
上述设计，修改现有的协议栈架构，不改变其它的协议层的功能，而是在第二通道增加一个适配层，作为发送端的第二终端设备通过第二通道的适配层将第一通道的标识信息指示给第一终端设备，从而第一终端设备获知该两个通道之间具有映射关系，进而能够将通过该两个通道接收到的数据包进行数据汇聚处理。
在一种可能的设计中，所述第一通道的标识信息为所述第一通道的逻辑信道标识。
在一种可能的设计中，还包括：所述第一终端设备获取第一指示信息，所述第一指示信息用于指示在所述第一终端设备的第二通道配置有所述第一适配层。
上述设计中，第二终端设备可以通过接收无线网络设备发送的第一指示信息来获取该第一指示信息，还可以通过第二数据包携带的该第一指示信息来获取该第一指示信息。
在一种可能的设计中，所述第一适配层位于所述第二通道的PDCP层之上，所述第一通道和所述第二通道共用第一汇聚层，所述第一汇聚层位于所述第一适配层之上，所述汇聚协议层为所述第一汇聚层，所述第一汇聚层对应的第一汇聚层实体为所述汇聚协议层实体；或者，所述第一适配层位于所述第二通道的PDCP层与RLC层之间，所述第一通道和所述第二通道共用同一PDCP层，所述同一PDCP层为所述第一汇聚层，所述同一PDCP层对应的PDCP层实体为所述汇聚协议层实体。
上述设计中，提供两个协议栈架构，并说明第一终端设备在哪个协议层进行数据汇聚。
在一种可能的设计中，第一终端设备还可以通过如下方式确定第一通道和第二通道具有映射关系。示例性的，所述第一终端设备接收所述无线网络设备发送的配置信息，所述配置信息用于指示所述第一通道与所述第二通道具有映射关系。
在一种可能的设计中，所述配置信息中可以包括所述第一通道的标识信息与第二通道的标识信息的对应关系；其中，所述第一通道的标识信息为所述第一通道的逻辑信道标识；所述第二通道的标识信息包括所述第二通道的逻辑信道标识和/或所述第二通道的无线承载标识。
在一种可能的设计中，第一终端设备还可以通过如下方式确定所述第一通道与所述第二通道具有映射关系：若通过所述第一通道接收的所述第一数据包携带所述第二通道的标识信息，则确定所述第一通道与所述第二通道具有映射关系。
上述设计，通过在第一通道携带第二通道的标识信息，从而第一终端设备获知该两个通道之间具有映射关系，进而能够将通过该两个通道接收到的数据包进行数据汇聚处理。
在一种可能的设计中，所述第一终端设备在第一通道配置有第二适配层，所述第二适配层位于所述第一通道的分组数据汇聚协议PDCP层之上，或者所述第二适配层位于所述第一通道的PDCP层和RLC层之间；所述第一数据包的所述第二适配层携带所述第二通道的标识信息。
上述设计，修改现有的协议栈架构，不改变其它的协议层的功能，而是在第一通道增加一个适配层，作为发送端的第二终端设备通过第一通道的适配层将第二通道的标识信息 指示给第一终端设备，从而第一终端设备获知该两个通道之间具有映射关系，进而能够将通过该两个通道接收到的数据包进行数据汇聚处理。
在一种可能的设计中，所述第二通道的标识信息包括所述第二通道的逻辑信道标识和/或所述第二通道的无线承载标识。
在一种可能的设计中，还包括：所述第一终端设备获取第二指示信息，所述第二指示信息用于指示在所述第一终端设备的第一通道配置有所述第二适配层。
示例性的，所述第一终端设备可以通过如下方式获取第二指示信息：
所述第一终端设备接收无线网络设备发送的第二指示信息，所述第二指示信息用于指示在所述第一终端设备的第一无线接口配置有所述第二适配层。或者所述第一数据包携带第二指示信息，所述第二指示信息用于指示所述第一终端设备的第一无线接口配置有所述第二适配层，从而从第一数据包中获取第二指示信息。
在一种可能的设计中，若所述第二适配层位于所述第一无线接口的分组数据汇聚协议PDCP层之上，所述第一无线接口和所述第二无线接口共用第二汇聚层，所述第二汇聚层位于所述第二适配层之上；所述汇聚协议层为所述第二汇聚层，所述第二汇聚层对应的第二汇聚层实体为所述汇聚协议层实体；或者，所述第二适配层位于第一无线接口的PDCP层与RLC层之间，所述第一无线接口和所述第二无线接口共用同一PDCP层；所述汇聚协议层为所述同一PDCP层，所述同一PDCP层对应的PDCP层实体为所述汇聚协议层实体。
在一种可能的设计中，若所述第一数据包的PDCP层包括第一汇聚标识，第一汇聚标识用于指示所述第一数据包所属的数据承载；所述第二数据包的PDCP层包括第二汇聚标识，第二汇聚标识用于指示所述第二数据包所属的数据承载；则所述第一终端设备通过如下方式确定所述第一通道与所述第二通道具有映射关系：所述第一终端设备确定所述第一汇聚标识与所述第二汇聚标识相同。
在一种可能的设计中，若所述第一终端设备的第一无线接口和第二无线接口共用同一第三汇聚层，所述第三汇聚层位于所述第一终端设备的PDCP层之上，所述第一数据包的所述第三汇聚层包括第三汇聚标识，第三汇聚标识用于指示所述第一数据包所属的数据承载；所述第二数据包的第三汇聚层包括第四汇聚标识，第四汇聚标识用于指示所述第二数据包所属的数据承载；所述第一终端设备通过如下方式确定所述第一通道与所述第二通道具有映射关系：所述第一终端设备确定所述第三汇聚标识与所述第四汇聚标识相同。
在一种可能的设计中，若所述第二无线接口为所述第二终端设备和所述第一终端设备直接通信的通信接口，所述第一终端设备的第一无线接口配置有第三适配层，所述第一终端设备的所述第二无线接口配置有第四适配层，所述第四适配层位于所述第二无线接口的PDCP层之上，所述第一无线接口和所述第二无线接口共用第四汇聚层，所述第四汇聚层位于所述第三适配层以及所述第四适配层之上；所述第一数据包的第三适配层包括第五汇聚标识，所述第五汇聚标识用于指示针对所述第一数据包在所述第四汇聚层进行数据汇聚；所述第二数据包的第四适配层包括第六汇聚标识，所述第六汇聚层标识用于指示针对所述第二数据包在所述第四汇聚层进行数据汇聚。从而第一终端设备确定第三适配层的第五汇聚标识与第四适配层的第六汇聚标识指示同一第四汇聚层，从而确定第一数据包和第二数据包需要进行汇聚处理。即在所述第一数据包与所述第二数据包均被传输到所述第四汇聚层时，所述第一终端设备在所述第四汇聚层对所述第一数据包和所述第二数据包进行数据汇聚处理。
在一种可能的设计中，所述第一数据包携带第三指示信息，所述第三指示信息用于指示在所述第一无线接口配置有所述第三适配层；所述第二数据包携带第四指示信息，所述第四指示信息用于指示在所述第二无线接口配置有所述第四适配层。
在一种可能的设计中，若所述第二无线接口为所述第二终端设备和所述第一终端设备直接通信的通信接口，所述第一终端设备的第一无线接口配置有第五适配层，所述第五适配层位于所述第一无线接口的PDCP层和RLC层之间，所述第一终端设备的所述第二无线接口配置有第六适配层，所述第六适配层位于所述第二无线接口的PDCP层和RLC层之间，所述第一无线接口与所述第二无线接口共用同一PDCP层；所述第一数据包的第五适配层包括第七汇聚标识，所述第七汇聚标识用于指示针对所述第一数据包在所述同一PDCP层进行数据汇聚；所述第二数据包的第六适配层包括第八汇聚标识，所述第八汇聚层标识用于指示针对所述第二数据包在所述同一PDCP层进行数据汇聚。即所述第一数据包与所述第二数据包均被传输到所述同一PDCP层时，所述第一终端设备在所述同一PDCP层对所述第一数据包与所述第二数据包进行数据汇聚处理。
在一种可能的设计中，所述第一数据包携带第五指示信息，所述第五指示信息用于指示在所述第一终端设备的第一无线接口配置有所述第五适配层；所述第二数据包携带第六指示信息，所述第六指示信息用于指示在所述第一终端设备的第二无线接口配置有所述第六适配层。
在一种可能的设计中，所述第一无线接口和所述第二无线接口为在不同的制式下所述第二终端设备和所述第一终端设备直接通信的通信接口；通过如下方式确定所述第一通道与所述第二通道具有映射关系：根据预配置的映射规则确定所述第一通道与所述第二通道具有映射关系。
第二方面，本申请实施例提供了一种通信方法，包括：第二终端设备通过第一通道向所述第一终端设备发送第一数据包；所述第二终端设备通过第三通道向所述第一终端设备发送第二数据包，所述第二数据包携带所述第一通道的标识信息；所述第一通道承载在第一无线接口，所述第一无线接口为所述第二终端设备与第一终端设备直接通信的无线通信接口，所述第三通道承载在第三无线接口，所述第三无线接口为所述无线网络设备和所述第二终端设备通信的无线通信接口，或者所述第三无线接口为所述第一终端设备与所述第二终端设备直接通信的另一无线通信接口；其中，所述第一数据包和所述第二数据包由所述第一终端设备进行汇聚处理。
本申请实施例中，第二终端设备在第三通道向第一终端设备发送的第二数据包携带第一通道的标识信息，从而第一终端设备确定第一数据包和第二数据需要进行数据汇聚处理。
在一种可能的设计中，所述第一通道的标识信息为所述第一通道的逻辑信道标识。
在一种可能的设计中，所述第二终端设备的第三通道配置有适配层，所述适配层位于所述第二通道的PDCP层之上，或者所述适配层位于所述第二通道的PDCP层和RLC层之间，在所述第一数据包的所述适配层携带所述第一通道的标识信息。
在一种可能的设计中，还包括：所述第二终端设备接收所述无线网络设备发送的双连接指示，所述双连接指示用于指示所述第二终端设备通过两个通道向所述第一终端设备发送需要汇聚的数据包。
上述设计中，可以由无线网络设备通知第二终端设备开启双连接指示，从而第二终端设备开始执行通过两个通道(第一通道和第三通道)向第一终端设备发送需要汇聚的数据 包。
在一种可能的设计中，还包括：所述第二终端设备接收所述无线网络设备发送的双连接开启规则；所述第二终端设备在确定满足所述双连接开启规则时，开启通过所述第一通道和第三通道向所述第一终端设备发送需要汇聚的数据包；其中，所述双连接开启规则包括如下任一项或任几项：
所述第二终端设备当前传输的数据包对应的近距离服务包优先级PPPP小于第一阈值；
所述第二终端设备当前传输的数据包对应的近距离服务包可靠性PPPR小于第二阈值；
所述第二终端设备的当前采用的接口的信道忙比例CBR大于第三阈值；
所述第二终端设备的当前未采用的其中一接口的信道忙比例CBR小于第四阈值；
所述第二终端设备的当前采用的接口的信号强度小于第五阈值；
所述第二终端设备的当前未采用的其中一接口的信号强度高于第六阈值；
所述第二终端设备或第二终端设备的其中一通道的待传数据包数量大于第七阈值。
上述设计中，由无线网络设备给第二终端设备配置双连接开启规则，从而第二终端设备根据双连接开启规则来决策什么时候开启双连接。
第三方面，本申请实施例提供一种通信方法，包括：所述第二终端设备接收无线网络设备发送的配置信息，所述配置信息用于表征第一通道和第三通道具有映射关系；
其中，所述第一通道承载在第一无线接口，所述第一无线接口为所述第二终端设备和所述第一终端设备直接通信的无线通信接口，所述第三通道承载在第三无线接口，所述第三无线接口为所述无线网络设备与所述第二终端设备通信的无线通信接口，或者所述第三无线接口为所述第二终端设备和所述第一终端设备直接通信的另一无线通信接口；
所述第二终端设备根据所述配置信息分别通过所述第一通道和所述第三通道向所述第一终端设备发送需要汇聚的数据包。
上述设计，由无线网络设备配置第二终端设备的两个通道的映射关系，从而第二终端设备基于映射关系来向第一终端设备发送给需要在第一终端设备汇聚的数据包。
在一种可能的设计中，所述配置信息中包括所述第一通道的标识信息与第三通道的标识信息的对应关系；其中，所述第一通道的标识信息为所述第一通道的逻辑信道标识；
所述第三通道的标识信息包括所述第三通道的逻辑信道标识和/或所述第三通道的无线承载标识。
在一种可能的设计中，还包括：所述第二终端设备接收所述无线网络设备发送的双连接指示，所述双连接指示用于指示所述第二终端设备通过两个通道向所述第一终端设备发送需要汇聚的数据包。
上述设计中，可以由无线网络设备通知第二终端设备开启双连接指示，从而第二终端设备开始执行通过两个通道(第一通道和第三通道)向第一终端设备发送需要汇聚的数据包。
在一种可能的设计中，还包括：所述第二终端设备接收所述无线网络设备发送的双连接开启规则；所述第二终端设备在确定满足所述双连接开启规则时，开启通过所述第一通道和第三通道向所述第一终端设备发送需要汇聚的数据包；其中，所述双连接开启规则包括如下任一项或任几项：
所述第二终端设备当前传输的数据包对应的近距离服务包优先级PPPP小于第一阈值；
所述第二终端设备当前传输的数据包对应的近距离服务包可靠性PPPR小于第二阈值；
所述第二终端设备的当前采用的接口的信道忙比例CBR大于第三阈值；
所述第二终端设备的当前未采用的其中一接口的信道忙比例CBR小于第四阈值；
所述第二终端设备的当前采用的接口的信号强度小于第五阈值；
所述第二终端设备的当前未采用的其中一接口的信号强度高于第六阈值；
所述第二终端设备或第二终端设备的其中一通道的待传数据包数量大于第七阈值。
上述设计中，由无线网络设备给第二终端设备配置双连接开启规则，从而第二终端设备根据双连接开启规则来决策什么时候开启双连接。
第四方面，本申请实施例提供了一种通信方法，包括：第二终端设备通过第一通道向第一终端设备发送第一数据包，所述第一数据包携带汇聚标识，所述汇聚标识用于指示第一终端设备承载所述汇聚标识的数据包所汇聚的协议层实体，或者用于指示所述第一数据包所属的无线承载；所述第二终端设备通过第三通道向所述第一终端设备发送第二数据包，所述第二数据包携带所述汇聚标识；其中，所述第一通道承载在第一无线接口，所述第一无线接口为所述第二终端设备和所述第一终端设备直接通信的通信接口，所述第三通道承载在第三无线接口，所述第三无线接口为无线网络设备与所述第二终端设备通信的通信接口，或者所述第三无线接口为所述第二终端设备和所述第一终端设备直接通信的通信接口。
本申请实施例中，通过两个通道发送的两个数据包携带相同的汇聚标识，从而第一终端设备确定该两个通道具有映射关系，需要将该两个数据包进行汇聚处理。
在一种可能的设计中，若所述第三无线接口为所述第二终端设备和所述第一终端设备直接通信的通信接口，所述第二终端设备的第一通道配置有第一适配层，所述第二终端设备的第三通道配置有第二适配层；所述第一数据包的所述第一适配层包括所述汇聚标识；所述第二数据包的所述第二适配层包括所述汇聚标识。
其中，所述第一适配层位于所述第一通道的PDCP层和无线链路控制协议RLC层之间，所述第二适配层位于所述第三通道的PDCP层和RLC层之间，所述第二终端设备的所述第一通道和所述第三通道共用同一PDCP层；或者，所述第一适配层位于所述第一通道的分组数据汇聚协议PDCP层之上，所述第二适配层位于所述第三通道的PDCP层之上，所述第一通道和所述第三通道共用同一汇聚层，所述汇聚层位于所述第一适配层和所述第二适配层之上。
上述设计中，修改协议层架构，通过在两个通道均增加适配层，在两个通道增加的适配层上均添加相同的汇聚标识。
在一种可能的设计中，若所述第二终端设备的第一通道和第三通道共用同一PDCP层；所述第一数据包的PDCP层包括所述汇聚标识；所述第二数据包的PDCP层包括所述汇聚标识。
在一种可能的设计中，若所述第二终端设备的第一通道和第三通道共用同一汇聚层，所述汇聚层位于所述第二终端设备的PDCP层之上；所述第一数据包的所述汇聚层包括所述汇聚标识；所述第二数据包的所述汇聚层包括所述汇聚标识。
在一种可能的设计中，还包括：所述第二终端设备接收所述无线网络设备发送的双连接指示，所述双连接指示用于指示所述第二终端设备通过两个通道向所述第一终端设备发送需要汇聚的数据包。
上述设计中，可以由无线网络设备通知第二终端设备开启双连接指示，从而第二终端设备开始执行通过两个通道(第一通道和第三通道)向第一终端设备发送需要汇聚的数据 包。
在一种可能的设计中，还包括：所述第二终端设备接收所述无线网络设备发送的双连接开启规则；所述第二终端设备在确定满足所述双连接开启规则时，开启通过所述第一通道和第三通道向所述第一终端设备发送需要汇聚的数据包；其中，所述双连接开启规则包括如下中任一项或任几项：
所述第二终端设备当前传输的数据包对应的近距离服务包优先级PPPP小于第一阈值；
所述第二终端设备当前传输的数据包对应的近距离服务包可靠性PPPR小于第二阈值；
所述第二终端设备的当前采用的接口的信道忙比例CBR大于第三阈值；
所述第二终端设备的当前未采用的其中一接口的信道忙比例CBR小于第四阈值；
所述第二终端设备的当前采用的接口的信号强度小于第五阈值；
所述第二终端设备的当前未采用的其中一接口的信号强度高于第六阈值；
所述第二终端设备或第二终端设备的其中一通道的待传数据包数量大于第七阈值。
上述设计中，由无线网络设备给第二终端设备配置双连接开启规则，从而第二终端设备根据双连接开启规则来决策什么时候开启双连接。
第五方面，本申请实施例提供一种通信方法，包括：无线网络设备确定双连接指示；所述无线网络设备向所述第二终端设备发送双连接指示，所述双连接指示用于指示所述第二终端设备通过两个通道向第一终端设备发送需要汇聚的数据包。
本申请实施例中，由无线网络设备向第二终端设备发送双连接指示，从而第二终端设备在接收到指示，才开启通过两个通道向第一终端设备发送需要在第一终端设备汇聚的数据包。
在一种可能的设计中，所述无线网络设备向所述第二终端设备发送双连接指示之前，还包括：所述无线网络设备确定所述第二终端设备上报的至少一个参数满足预设规则。
其中，所述预设规则包括如下中任一项或任几项：
所述第二终端设备当前传输的数据包对应的近距离服务包优先级PPPP小于第一阈值；
所述第二终端设备当前传输的数据包对应的近距离服务包可靠性PPPR小于第二阈值；
所述第二终端设备的当前采用的接口的信道忙比例CBR大于第三阈值；
所述第二终端设备的当前未采用的其中一接口的信道忙比例CBR小于第四阈值；
所述第二终端设备的当前采用的接口的信号强度小于第五阈值；
所述第二终端设备的当前未采用的其中一接口的信号强度高于第六阈值；
所述第二终端设备或第二终端设备的其中一通道的待传数据包数量大于第七阈值。
在一种可能的设计中，所述方法还可以包括：无线网络设备通过第三通道接收第二终端设备发送的数据包，所述数据包中携带第一通道的标识信息，所述第一通道承载在第一无线接口，所述第一无线接口为第一终端设备与所述第二终端设备通信的通信接口，所述三通道承载在第三无线接口，所述第三无线接口为所述无线网络设备与所述第二终端设备通信的通信接口；所述无线网络设备接收所述第二终端设备发送的目的信息；其中，所述目的信息包括如下中任一项或任几项：所述第一终端设备的标识信息、所述第一终端设备所在组的组标识、所述数据包所属的业务标识；所述无线网络设备根据所述目的信息确定所述无线网络设备与所述第一终端设备通信的第二通道；所述无线网络设备通过所述第二通道向所述第一终端设备发送给所述数据包。
在一种可能的设计中，所述无线网络设备配置有适配层，所述适配层位于所述无线网 络设备的分组数据汇聚协议PDCP层之上，或者所述适配层位于所述无线网络设备的PDCP层和无线链路控制协议RLC层之间；所述第二数据包的所述第一适配层携带所述第一通道的标识信息。
在一种可能的设计中，所述无线网络设备通过第三通道接收第二终端设备发送的第一数据包，所述无线网络设备接收第二终端设备发送的目的信息，包括：所述网络设备通过第三通道接收所述第二终端设备发送的所述数据包，所述数据包的适配层携带所述第一通道的标识信息以及所述目的信息。
第六方面，本申请实施例提供一种通信方法，包括：无线网络设备确定双连接开启规则；所述无线网络设备将所述双连接开启规则发送给第二终端设备，所述双连接开启规则用于指示所述第二终端设备在确定满足所述双连接开启规则时，开启通过两个通道向所述第一终端设备发送需要汇聚的数据包；其中，所述双连接开启规则包括如下任一项或任几项：
所述第二终端设备当前传输的数据包对应的近距离服务包优先级PPPP小于第一阈值；
所述第二终端设备当前传输的数据包对应的近距离服务包可靠性PPPR小于第二阈值；
所述第二终端设备的当前采用的接口的信道忙比例CBR大于第三阈值；
所述第二终端设备的当前未采用的其中一接口的信道忙比例CBR小于第四阈值；
所述第二终端设备的当前采用的接口的信号强度小于第五阈值；
所述第二终端设备的当前未采用的其中一接口的信号强度高于第六阈值；
所述第二终端设备或第二终端设备的其中一通道的待传数据包数量大于第七阈值。
第七方面，本申请实施例提供一种通信方法，包括：
第二无线网络设备通过第三通道接收第二终端设备发送的数据包，所述数据包中携带第一通道的标识信息，所述第一通道承载在第一无线接口，所述第一无线接口为第一终端设备与所述第二终端设备通信的通信接口，所述第三通道承载在第三无线接口，所述第三无线接口为所述第二无线网络设备与所述第二终端设备通信的通信接口；所述第二无线网络设备服务于所述第二终端设备；
所述第二无线网络设备通过所述第二无线网络设备与所述第一无线网络设备之间的用户面转发隧道，将所述数据包发送给第一无线网络设备；所述第一无线网络设备服务于所述第一终端设备。从而第一无线网络设备在接收到该数据包后，确定第一无线网络设备与所述第一终端设备通信的第二通道，第二通道承载在第二无线接口，所述第二无线接口为所述第一无线网络设备与所述第一终端设备通信的通信接口。
本申请实施例中，第二无线网络设备除了通过上述在发送数据包的过程将第一通道的标识信息作为用户面承载发送给第一无线网络设备，还可以在获取到第一通道的标识信息后，通过控制面或者用户面发送给第一无线网络设备。
第八方面，本申请提供一种通信装置，所述通信装置具备实现上述第一方面涉及的第一终端设备的功能，比如，所述通信装置包括所述第一终端设备执行上述第一方面中涉及步骤所对应的模块或单元或手段(means)，所述功能或单元或手段(means)可以通过软件实现，或者通过硬件实现，也可以通过硬件执行相应的软件实现。或者所述通信装置具备实现上述第二方面至第四方面中任一方面涉及的第二终端设备的功能，或者具备第五方面或第七方面涉及的无线网络设备的功能。
在一种可能的设计中，所述通信装置包括处理单元、收发单元，处理单元、收发单元 执行的功能可以和上述第一方面涉及的第一终端设备执行的步骤相对应，或者和上述第二方面至第四方面任一方面设计的第二终端设备执行的步骤相对应，或者和上述第五方面至第七方面的任一方面的无线网络设备执行的步骤相对应，在此不予赘述。
在另一种可能的设计中，所述通信装置包括处理器，还可以包括收发器，所述收发器用于收发信号，所述处理器执行程序指令，以完成上述第一方面以及第一方面任意可能的设计或实现方式中第一终端设备执行的方法，或者完成第二方面至第四方面任一方面中第二终端设备执行的方法，或者完成第五方面至第七方面任一方面中无线网络设备执行的方法。
其中，所述通信装置还可以包括一个或多个存储器，所述存储器用于与处理器耦合，其保存实现上述第一方面涉及的第一终端设备的功能的必要计算机程序指令和/或数据。所述一个或多个存储器可以和处理器集成在一起，也可以与处理器分离设置。本申请并不限定。所述处理器可执行所述存储器存储的计算机程序指令，完成上述第一方面以及第一方面任意可能的设计或实现方式中第一终端设备执行的方法，或者完成第二方面至第四方面任一方面中第二终端设备执行的方法，或者完成第五方面至第七方面任一方面中无线网络设备执行的方法。
第九方面，本申请提供一种芯片，所述芯片可以与存储器相通信，或者所述芯片中包括存储器，所述芯片执行所述存储器中存储的程序指令，以实现上述第一方面至第七方面中设计的第一终端设备或者第二终端设备或者无线网络设备(包括第一无线网络设备和第二无线网络设备)的相应功能。
第十方面，本申请提供一种计算机存储介质，所述计算机存储介质存储有计算机可读指令，所述计算机可读指令被执行时，使得实现第一方面至第七方面中设计的第一终端设备或者第二终端设备或者无线网络设备(包括第一无线网络设备和第二无线网络设备)的相应功能。
第十一方面，本申请还提供一种包含软件程序的计算机程序产品，当其在计算机上运行时，使得实现第一方面至第七方面中设计的第一终端设备或者第二终端设备或者无线网络设备(包括第一无线网络设备和第二无线网络设备)的相应功能。
第十二方面，本申请还提供一种通信系统，在所述通信系统中包括上述第一方面至第七方面中所涉及的所述第一终端设备，和/或，所述第二终端设备，和/或，所述无线网络设备(可以包括第一无线网络设备和第二无线网络设备)。
附图说明
图1是本申请实施例应用的无线通信系统示意图；
图2是本申请实施例提供的通信方法的示意性流程图；
图3是本申请实施例提供的第一种协议栈架构的示意性框图；
图4是本申请实施例提供的第二种协议栈架构的示意性框图；
图5是本申请实施例提供的第三种协议栈架构的示意性框图；
图6是本申请实施例提供的第四种协议栈架构的示意性框图；
图7是本申请实施例提供的第五种协议栈架构的示意性框图；
图8是本申请实施例提供的第六种协议栈架构的示意性框图；
图9是本申请实施例提供的第七种协议栈架构的示意性框图；
图10A是本申请实施例提供的第八种协议栈架构的示意性框图；
图10B是本申请实施例提供的无线网络设备对适配层透明的协议栈架构示意框图；
图11是本申请实施例提供的第九种协议栈架构的示意性框图；
图12是本申请实施例提供的第十种协议栈架构的示意性框图；
图13是本申请实施例提供的第十一种协议栈架构的示意性框图；
图14是本申请实施例提供的第十二种协议栈架构的示意性框图；
图15为本申请实施例提供的通信装置1500的一结构示意图；
图16为本申请实施例提供的通信装置1600的一结构示意图；
图17为本申请实施例提供的无线网络设备的一结构示意图；
图18为本申请实施例提供的终端设备的一结构示意图。
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。该无线通信系统可以包括无线网络设备110和终端设备。无线网络设备110可以是与终端设备通信的设备。无线网络设备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无线网络设备110和两个终端(第一终端设备120和第二终端设备130)，可选地，该无线通信系统可以包括多个无线网络设备，每个无线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。
在申请实施例中，无线网络设备，可以称为无线接入网(radio access network，RAN)设备，例如可以是基站、发射和接收点(transmit and receive point，TRP)或接入节点，接入节点具体可以是全球移动通信(global system for mobile communication，GSM)系统或码分多址(code division multiple access，CDMA)系统中的基站，也可以是宽带码分多址(wideband code division multiple access，WCDMA)系统中的基站(NodeB)，还可以是LTE系统中的演进型基站(evolutional node B，eNB或eNodeB)，或者是5G网络中的基站设备、小基站设备、无线访问节点(WiFi AP)、无线互通微波接入基站(worldwide interoperability for microwave access base station，WiMAX BS)等，本申请对此并不限定。
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；终端，也可称为接入终端、用户设备(user equipment，UE)，用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、无线通信设备、用户代理或用户装置等。终端可以是蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字处理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备、物联网终端设备，比如火灾检测传感器、智能水表/电表、工厂监控设备等等，或者车联网终端设备。
在图1所示的无线通信系统中，第二终端设备130可以通过直连无线接口与第一终端设备120进行通信，该直连无线接口可以理解为用于终端设备之间直接通信的空口，例如， 可以是车联网中的PC5接口，包括LTE系统定义的PC5接口或者新制式New Radio即NR系统定义的PC5接口，后续统一称为LTE PC5和NR PC5。通过上述直连无线接口在终端之间进行数据传输，可以无需无线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。第一终端设备120也可以通过非直连无线接口与第二终端设备130进行通信，该非直连无线接口可以理解为第二终端设备130和无线网络设备110之间的通信的无线接口以及无线网络设备110与第一终端设备120之间通信的无线接口，例如可以是Uu接口，同样包括LTE系统定义的Uu接口或者新制式NR系统定义的Uu接口，后续统一称为LTE Uu和NR Uu。
目前第三代合作伙伴计划(3rd generation partnership project，3GPP)正在讨论LTE PC5接口基于载波聚合(carrier aggregation，CA)的数据分流汇聚，其中数据分流汇聚特指发送端的数据包的复制(packet duplication)和接收端的重排序和重复包检测。而本申请实施中涉及到的数据分流汇聚包括两种情况：第一种情况是发送端的数据包的复制(packet duplication)和数据包的分流(packet split)，以及接收端的重排序和重复包检测。第二种情况是发送端的数据包的分流和接收端的重排序和重复包检测。从发送端的角度出发，数据包的复制是指，发送端对数据包进行复制。数据包的分流是指，发送端将属于同一个汇聚协议层实体的多个数据包通过多个不同的通道发送给接收端，所述多个数据包可以具有相同的SN号或不同的SN号。例如，发送端将经过复制后的多个相同(即有相同SN号)的数据包通过多个不同的通道发送给接收端，或者将未经过复制的多个不同的(即有不同SN号)的数据包通过多个不同的通道发送给接收端。从接收端的角度出发，数据包的重排序和重复包检测是指，接收端通过不同通道接收到的数据，送到相同的汇聚层实体，根据数据包的序列号SN进行重排序和重复包检测。重复包检测指的是当汇聚层实体发现某个序列号SN＝2重复出现时，只保留一个序列号SN＝2的数据包，删除序列号SN＝2的其他数据包。其中，上述通道是承载在发送端与接收端之间的传输的无线接口上的，比如其中一个通道承载在PC5接口，另一个通道承载在Uu接口。再比如其中一个通道承载在NR制式下的PC5接口，另一个通道承载在LTE制式下的PC5接口。再比如两个通道均承载在NR制式下的PC5接口，或者两个通道均承载在LTE制式下的PC5接口。
但是，接收端无法获知通过哪几个通道接收到的数据包需要汇聚到同一个汇聚协议层实体。
有鉴于此，本申请实施例提供了一种通信方法及装置，在接收端汇聚数据包之前，获取不同通道之间的映射关系，从而确定通过多个具有映射关系的通道接收到的数据包需要进行数据汇聚。从而解决了现有存在的接收端不知道通过哪几个通道接收到的数据包需要汇聚的问题。
另外，示例性的，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。
参见图2所示，为本申请实施例提供的通信方法流程示意图。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130，或者位于第一终端设备130上的芯片，或者位于第一终端设备130上的通信模块；第二终端设备可以是图1所示的第二终端设备120，或者位于第二终端设备120上的芯片，或者位于第一终端设备130上的通信模块。
S201，第一终端设备通过第一通道接收由第二终端设备发送的第一数据包。
示例性的，第二终端设备通过第一通道向第一终端设备发送第一数据包，从而第一终端设备通过第一通道接收第一数据包。
其中，第一通道承载在第一无线接口，所述第一无线接口为所述第二终端设备和所述第一终端设备直接通信的无线通信接口。
S202，第一终端设备通过第二通道接收由第二终端设备发送的第二数据包。
其中，所述第二通道承载在第二无线接口。
在第一种可能的实现方式中，所述第二无线接口为所述第二终端设备和所述第一终端设备直接通信的另一无线通信接口。
示例性的，上述第一无线接口可以是上文提及的用于终端设备之间直接通信的直连无线接口，比如车辆网中的PC5接口。例如第二终端设备通过LTE PC5或NR PC5接口的第一通道(例如逻辑信道1)向第一终端设备发送第一数据包。第二无线接口可以是用于终端设备之间直接通信的另一直连无线接口。第一无线接口和第二无线接口可以是同一通信制式下的直连无线接口，比如均为NR制式下的无线接口，或者均为LTE制式下的无线接口。第一无线接口和第二无线接口也可以是不同通信制式下的直连无线接口，比如其中一个是NR制式下的无线接口，则另一个是LTE制式下的无线接口。例如第二终端设备通过LTE PC5或NR PC5接口的第二通道(例如逻辑信道2)向第一终端设备发送第二数据包。
在第二种可能的实现方式中，所述第二无线接口为无线网络设备与所述第一终端设备通信的无线通信接口，又称为非直连无线接口，例如Uu接口。示例性的，第二终端设备可以通过第三通道传输数据包给无线网络设备，从而无线网络设备通过承载在第二无线接口的第二通道向第一终端设备传输数据包。其中第三通道承载在第三无线接口，第三无线接口是第二终端设备与无线网络设备通信的无线通信接口，例如Uu接口。例如第二终端设备通过LTE Uu或NR Uu接口的第三通道(例如逻辑信道2或无线数据承载2)向无线网络设备发送第二数据包。无线网络设备通过LTE Uu或NR Uu接口的第二通道(例如逻辑信道3或无线数据承载3)向第一终端设备发送第二数据包。
上述第一通道和上述第二通道之间具有映射关系。其中，映射关系用于指示由第一通道接收的数据包和由第二通道接收的数据包需要汇聚在同一汇聚协议层实体。
本申请实施例中，第一终端设备可以但不仅限于通过如下方式确定第一通道和第二通道之间具有映射关系。
第一种可能的方式，若通过第二通道接收的第二数据包中携带第一通道的标识信息，则第一通道和第二通道之间具有映射关系。
第二种可能的方式，第一终端设备接收无线网络设备发送的配置信息，该配置信息用于指示第一通道和第二通道之间具有映射关系。配置信息中可以包括第一通道的标识信息和第二通道的标识信息的对应关系。
在本申请实施例中，第一通道的标识信息可以为第一通道的逻辑信道标识或者逻辑信道标识列表。第二通道的标识信息可以为第二通道的逻辑信道标识和/或第二通道的无线承载标识，即第二通道的标识信息可以为第二通道的逻辑信道标识，或者第二通道的标识信息可以为第二通道的无线承载标识，或者第二通道的标识信息可以包括第二通道的逻辑信道标识和第二通道的无线承载标识。
第三种可能的方式，第一数据包的汇聚协议层携带的汇聚标识和第二数据包的汇聚协议层携带的汇聚标识相同。汇聚标识用于指示携带该汇聚标识的数据包所属的无线数据承 载或对应的汇聚协议层实体。其中汇聚协议层可以是PDCP协议层，也可以是新增的协议层，后续为了描述方便，将新增的协议层称为汇聚层。
第四种可能的方式，若通过第一通道接收的第一数据包中携带第二通道的标识信息，则第一通道和第二通道之间具有映射关系。
第五种可能的方式，通过在第一终端设备预配置映射规则，从而第一终端设备根据预配置的映射规则确定第一通道和第二通道具有映射关系。
可选的，该第五种可能的方式适用于第一无线接口和第二无线接口均为直连无线接口的情况。比如当第二终端设备先建立LTE PC5接口，则采用LTE PC5接口的通道的逻辑信道标识(logical channel identify，LCID)＝1～10；当后建立NR PC5接口时，则采用NR PC5LCID＝11～20。其中LTE PC5 LCID＝1和NR PC5 LCID＝11具有映射关系，LTE PC5 LCID＝2和NR PC5 LCID＝12具有映射关系，以此类推。或者反之亦可。
在该第五种可能的方式下，第一终端设备和第二终端设备均可以采用该方式确定第一通道和第二通道具有映射关系。
S203，第一终端设备根据所述映射关系将所述第一数据包与所述第二数据包传输至同一汇聚协议层实体进行数据汇聚处理。
可选地，在第二种可能的实现方式下，当上述第二无线接口为非直连无线接口时，通过承载在第二无线接口的第二通道接收第二数据包的第一终端设备可以属于一个终端设备集合，也就是说，第二终端设备通过第三通道传输第二数据包给无线网络设备，无线网络设备接收到第二数据包后，可以通过组播或广播的方式帮助第二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一终端设备。
在第二种可能的实现方式下，第一终端设备和第二终端设备可以属于同一无线网络设备管辖。换句话说第一终端设备和第二终端设备接入同一无线网络设备。在上文中提及的帮助第二终端设备向第一终端设备转发第二数据包的无线网络设备为第一终端设备和第二终端设备接入的无线网络设备。第一终端设备和第二终端设备还可以属于不同的无线网络设备管辖，为了方便区分，将第一终端设备接入的无线网络设备称为第一无线网络设备，将第二终端设备接入的无线网络设备称为第二网络设备。在该情况下，上文中提及的帮助第二终端设备向第一终端设备转发第二数据包的无线网络设备包括第一无线网络设备和第二无线网络设备。
在本申请实施例中，作为接收端的第一终端设备，通过获知第一通道与第二通道之间的映射关系，从而能够确定通过第一通道接收到的数据包和通过第二通道接收到的数据包需要汇聚在同一汇聚协议层实体，进而执行数据汇聚处理。在本申请实施例中，虽然分别通过两个不同的通道进行传输，但是最终汇聚在同一汇聚协议层实体。
为了实现上述将分别通过承载在两个无线接口的两个通道传输的数据包，发送至同一个汇聚协议层实体进行数据汇聚，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。以下结合附图，详细说明每种协议栈的架构，以及传输数据包的方式，以下以数据分流汇聚的第一种情况为例进行说明。第一种情况的处理过程与第二种情况的处理过程类似，区别仅在于，第一种情况中发送端进行处理时，还包括数据包的复制，第二种情况仅分流，不对数据包执行复制操作，针对第二种情况的具体过程不再重复赘述。
第一种协议栈架构，承载第一通道的第一无线接口为第二终端设备和第一终端设备直接通信的直连无线接口，承载第二通道的第二无线接口为无线网络设备和第一终端设备之 间通信的非直连无线接口，承载第三通道的第三无线接口为第二终端设备与无线网络设备之间通信的非直连无线接口。第一终端设备和第二终端设备均属于该无线网络设备管辖。
参见图3所示，为第一终端设备、第二终端设备以及无线网络设备中的协议层架构示意图。图3仅仅示出第一终端设备、第二终端设备以及无线网络设备中与本申请实施例相关的协议层，第一终端设备、第二终端设备以及无线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。
在图3中，第一终端设备和第二终端设备之间承载在非直连无线接口的第二通道和第三通道对应的协议栈架构中增加适配层(adaption layer)，其中适配层可以位于分组数据汇聚协议(packet data convergence protocol，PDCP)层和无线链路控制协议(radio link control，RLC)层之间。示例性的，在第一终端设备以及无线网络设备的第二通道的PDCP层和RLC层之间均配置有适配层，在第二终端设备以及无线网络设备的第三通道的PDCP层和RLC层之间均配置有适配层。其中，第一终端设备中第一通道和第二通道共用同一PDCP层，第二终端设备中的第一通道和第三通道共用同一PDCP层。
图3所示的协议栈架构可以适用于上述确定第一通道和第二通道具有映射关系的第一种可能的方式，则第二数据包的适配层携带所述第一通道的标识信息。
以下，在第一种可能的方式下，对通过三个通道传输数据包的过程进行详细说明。
第二终端设备在PDCP层，可以对待发送数据包进行复制处理后得到第一数据包和第二数据包。其中复制处理可以是将待发送的数据包进行复制后得到相同的第一数据包和第二数据包，即第一数据包的序列号和第二数据包的序列号相同。对于通过不同通道分流不同序列号的第一数据包和第二数据包的情况，可以不进行复制处理。
第二终端设备在第三通道的适配层为第二数据包添加第一通道的标识信息。之后经过第三通道的RLC层以及RLC层之下的各个实体处理后，通过第三无线接口发送给无线网络设备。
针对第一数据包，由于在第一通道未配置适配层，从而针对第一数据包不会经过适配层，而是直接到达RLC层，经过第一通道的RLC层以及RLC层之下的各个实体处理后，通过第一无线接口发送给第一终端设备。
可选地，第二终端设备还可以在第三通道的适配层为第二数据包添加源信息(Source Information，Src Info)，目的信息(destination Information，Dst Info)。
具体地，上述源信息用于指示第二终端设备，比如，所述第一无线接口用于识别第二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，示例性的，源信息还可以是第二终端设备的标识信息或业务标识信息等。其中，第二终端设备的标识信息可以是近距离通信的第二终端设备的ID，例如近距离服务层用户标识(ProSe UE ID)，近距离服务层2组标识(ProSe layer 2group ID)，目的层2标识(destination layer 2 ID)，车队platoon组标识(platnoon group ID)，多媒体广播和组播服务会话(multimedia broadcast and multicast service session,MBMS session)标识，临时移动组标识(temporary mobile group identity,TMGI)，无线网络设备为特定业务唯一分配的RAN侧组标识(G-RNTI)或其他标识；还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该第二终端设备的临时标识，或者该第二终端设备的位置信息等。
具体地，目的信息和源信息类似，可以包括所述第一无线接口用于识别第一终端设备 的地址信息，例如第一终端设备的地址信息(例如IP地址、MAC地址等)、第一终端设备标识信息(例如ProSe UE ID、ProSe Layer 2 group ID、destination layer 2 ID、platnoon group ID、IMSI等)，或者所述第二数据包所属的业务标识(例如MBMS session ID，TMGI等)，第一终端设备所在组的地址信息或第二终端设备所在的组的组标识，比如第一终端设备所在组对应的IP组播地址，第一终端设备所在组对应的MAC组播地址、或者网络分配的第一终端设备所在组的群组ID等。
当适配层携带目的信息时，无线网络设备直接通过目的信息找到对应的第一终端设备在第二无线接口的标识。例如当目的信息为第一终端设备的地址信息(例如IP地址、MAC地址等)时，无线网络设备根据之前第一终端设备上报的地址信息进行匹配，例如小区无线网络临时标识(cell radio network temporary identifier，C-RNTI)为x的用户对应的终端设备上报的IP地址或MAC地址为y，则可以根据IP地址或MAC地址y找到对应的C-RNTI或其他网络侧标识。例如当目的信息为第一终端设备标识信息(例如ProSe UE ID、ProSe Layer 2 group ID、destination layer 2 ID、platnoon group ID、IMSI等)，无线网络设备根据之前第一终端设备上报的地址信息进行匹配，例如C-RNTI标识为x的用户上报ProSe Layer 2 group ID/destination layer 2 ID/IMSI标识为y，则可以根据所述地址信息找到对应的C-RNTI或其他RAN侧标识。例如当目的信息为携带所述目的信息的数据包所属的业务标识(例如MBMS session ID，TMGI等)或RAN侧组标识时，无线网络设备直接确定第一终端设备在第二接口的标识为MBMS session ID，TMGI或RAN侧组标识。
可选的，上述无线网络设备获取的目的信息的过程还可以是由第二终端设备指示的，比如第二终端设备通过无线资源控制(radio resource control，RRC)消息指示无线网络设备所述目的信息，本申请实施例对无线网络设备获取上述目的信息的方式不做具体限定。如果第二终端设备通过RRC消息指示无线网络设备所述目的信息，则在上述适配层就不需要携带所述目的信息。
此外，上述第一通道的标识信息也可以通过其他方式携带，例如通过第三通道的MAC子头携带。原本第三通道的MAC子头携带了第三通道的逻辑信道标识。通过在第三通道MAC子头额外增加第一通道的标识信息，确定第一通道和第三通道具有映射关系。无线网络设备获取第一通道和第三通道的映射关系后，再决定第一通道和第二通道的映射关系。将所述第一通道的标识信息增加在第二通道的MAC子头中。接收端根据第二通道的MAC子头携带的第二通道的逻辑信道标识和第一通道的标识信息，确定第一通道和第二通道存在映射关系。
可选的，第一数据包和第二数据包在RLC层及RLC层之下的处理过程，可以与现有技术中传输数据包的过程基本相同，在此不再赘述。
无线网络设备在通过承载在第三无线接口的第三通道接收到所述第二数据包后，根据无线网络设备中的适配层携带的目的信息，确定第二数据包的第一终端设备，从而确定所述无线网络设备与所述第一终端设备通信的第二通道。所述无线网络设备将携带第一通道的标识信息的第二数据包发送给第一终端设备。在确定所述无线网络设备与所述第一终端设备通信的第二通道时，无线网络设备在根据目的信息确定第一终端设备后，决定第一通道与第二通道之间的映射关系，从而获得所述无线网络设备与所述第一终端设备通信的第二通道。具体地，无线网络设备接收第二数据包后，确定所述第二数据包的目的节点即第一终端设备在第二无线接口的标识。针对第二数据包的目的节点为单节点，即单播的情况， 所述第一终端设备在第二无线接口的标识为小区内唯一标识，例如C-RNTI或其他RAN侧标识。针对第二数据包的目的节点为多节点，即组播的情况，即第二数据包的目的节点为多个第一终端设备，所述第一终端设备在第二无线接口的标识为组标识(例如Platnoon group ID等)或业务标识(例如MBMS session ID，TMGI等)或为业务唯一分配的RAN侧组标识(例如Group Radio Network Temporary Identifier,G-RNTI等)。无线网络设备可以对所述适配层不做任何处理或者删除除了第一通道标识信息的其他信息，直接将携带适配层的第二数据包送往第二通道的RLC层，经过第二通道的RLC层以及RLC层之下的各个实体处理后，通过第二无线接口发送给第一终端设备。
第一终端设备在通过第二通道接收到第二数据包后，确定第二数据包的适配层中携带所述第一通道的标识信息，从而确定所述第一通道和所述第二通道之间具有映射关系，进而所述第一终端设备将通过第一通道接收到的第一数据包和通过第二通道接收到的第二数据包均传输至同一汇聚协议层实体进行数据汇聚处理，即在同一PDCP层实体进行数据汇聚。数据汇聚处理包括重排序和重复包检测，具体地，根据PDCP SN号进行排序。当特定PDCP SN号的数据包重复出现时，删除重复出现的数据包，只保留一份所述PDCP SN号对应的数据包。
可选的，在采用适配层来通知第一终端设备所述第一通道和第所述二通道具有映射关系的情况下，第一终端设备需要获知适配层的存在，从而能够从第二数据包的适配层获取第一通道的标识信息。一种获知适配层存在的方式是：无线网络设备向第一终端设备发送指示信息，指示信息用于指示第一终端设备的第二无线接口的第二通道配置有适配层。示例性的，无线网络设备可以在RRC消息中携带该指示信息，或者将该指示信息包括在下行控制信息(Downlink Control Information，DCI)，或者在其他协议层指示例如RLC头或MAC子头指示适配层的存在。另一种获知适配层存在的方式是：在无线网络设备转发第二数据包给第一终端设备时，在第二数据包的MAC层中携带该指示信息。再一种获知适配层存在的方式是：如果第一无线接口的第一通道优先建立，然后建立第二无线接口的第二通道，则基站可以在建立第二无线接口的第二通道，即配置给第一终端设备第二通道有适配层。如果第二无线接口的第二通道优先建立，则基站可以在RRC消息中对第二通道进行重新配置，即指示适配层的存在。
第一终端设备的PDCP实体对第一数据包和第二数据包进行数据汇聚，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，即第一数据包是第二数据包的复制，或者第二数据包是第一数据包的复制，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。若第一数据包和第二数据包不是基于同一数据包生成的，即第一数据包和第二数据包的序列号不同，则第一终端设备的PDCP实体对所述第一数据包和第二数据包进行重排序处理。
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，对通过第一通道和第二通道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，详细汇聚过程，此处不再赘述。
可选的，第二终端设备在PDCP层，对待发送数据包进行复制处理后得到第一数据包和第二数据包，分别通过第二终端设备的第一通道和第三通道将第一数据包和第二数据包发出。
示例性的，第二终端设备可以通过如下任一方式获知第一通道和第三通道具有映射关 系：
可能的方式1：由无线网络设备配置承载在第一无线接口的第一通道和承载在第三无线接口的第三通道之间的映射关系。
示例性的，无线网络设备向第二终端设备发送第一配置信息，第一配置信息用于指示第一通道和第三通道具有映射关系。其中，第一配置信息中可以包括第一通道的标识信息和第二通道的标识信息之间的对应关系，所述第一通道的标识信息可以为所述第一通道的逻辑信道标识，或者逻辑信道标识列表，逻辑信道标识列表中包括第一通道的逻辑信道标识。所述第三通道的标识信息包括所述第三通道的逻辑信道标识和/或所述第三通道的无线承载标识。
比如第一通道的标识信息为PC5 LCID(PC5 LCID list)，第三通道的标识信息为Uu LCID/Uu DRB ID。无线网络设备在第一配置信息中提供Uu LCID/DRB ID和对应的PC5LCID(或PC5 LCID list)。可选地，第一配置信息还可以包括PC5 LCID(或PC5 LCID list)对应的接收端的目的信息(具体内容参见前面详述)，以便发送端(第二终端设备)识别是第二终端设备和哪个接收端(此处为第一终端设备)之间的哪个/哪些PC5接口的通道，具体要和哪个/哪些Uu接口的通道绑定。
可选地，无线网络设备可以通过RRC消息或者广播消息或者MAC控制单元(control element，CE)CE向第二终端设备发送第一配置信息。
可能的方式2：在第二终端设备确定通过两个通道向第一终端设备发送需要汇聚的数据包时，自行确定第一无线接口的哪个/哪些通道和第三无线接口的哪个通道具有映射关系。
在一种可能的实现方式中，在上述确定第一通道和第三通道具有映射关系的可能方式2中，在第二终端设备基于双连接开启规则，确定启动双连接时，第二终端设备可以自行确定PC5接口的哪个通道和Uu接口的哪个通道绑定。具体的，如何在采用双连接自行确定哪两个通道具有映射关系，可参考后续在描述双连接开启规则时的详细描述。
第二种协议栈架构，承载第一通道的第一无线接口为第二终端设备和第一终端设备直接通信的直连无线接口，承载第二通道的第二无线接口为第一无线网络设备和第一终端设备之间通信的非直连无线接口，承载第三通道的第三无线接口为第二终端设备与第二无线网络设备之间通信的非直连无线接口。第一终端设备属于第一无线网络设备管辖，第二终端设备属于第二无线网络设备管辖。其中，第一终端设备、第二终端设备以及第一无线网络设备、第二无线网络设备中的协议栈架构如图4所示。
图4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种协议栈架构的介绍，下文重点介绍与图3所示的协议栈的区别。
由于第一终端设备接入第一无线网络设备，第二终端设备接入第二无线网络设备，因此在第二终端设备向第一终端设备传输第二数据包的过程中，需要通过两个无线网络设备进行转发。第二无线网络设备在通过第三通道接收到第二终端设备发送的第二数据包时，可以通过第二无线网络设备与第一无线网络设备之间建立的用户面转发隧道，将携带适配层(包含第一通道的标识信息)的第二数据包发送给第一无线网络设备，从而第一无线网络设备根据第二数据包的携带的适配层包括的目的信息确定第一终端设备，进而通过第二无线接口的第二通道将所述携带适配层的第二数据包发送给第一终端设备，其它的处理过程可以参见图3所示的协议栈中的描述，此处不再赘述。
在图4所示的协议栈下，第二无线网络设备可以在承载第二数据包的用户面的GPRS(GPRS是通用分组无线业务(general packet radio service)的简称)隧道协议头(GPRS Tunnelling Protocol for the user plane，GTP-U header)中通知第一无线网络设备所述第二数据包携带适配层，第一无线网络设备接收到通知后，通知给第一终端设备，从而第一终端设备获知到在第二通道配置有适配层。示例性的，第一无线网络设备可以通过RRC消息，或者下行控制信息(Downlink Control Information，DCI)携带指示信息，或者RLC头或MAC子头携带指示信息，所述指示信息用于指示第一终端设备设备的第二通道配置有适配层。
可选地，第二终端设备可以通过图3所述的协议栈架构下中所述的可能的方式1来获知第一通道和第三通道具有映射关系，此处不再赘述。
可选的，第二无线网络设备可以通过如下方式确定第一终端设备接入的无线网络设备是第一无线网络设备，从而确定第二无线网络设备接收到的第二数据包转发到哪个无线网络设备：针对第二数据包的目的节点为单节点，即单播情况，一方面，第二无线网络设备确定第一终端设备未在本无线网络设备的覆盖范围时，可以向邻区无线网络设备发起询问，比如基于第二数据包对应的目的信息(例如第一终端设备在第一无线接口的L2 ID，包括但不限于IP地址，MAC地址，ProSe UE ID，ProSe Layer 2 group ID，destination Layer 2 ID，platnoon group ID等)确定第一终端设备是否在其覆盖范围内。根据邻区无线网络设备反馈的信息确定第一终端设备在哪个无线网络设备的覆盖范围内。另一方面，邻近的无线网络设备之间事先交互两者覆盖下的终端设备在第一无线接口的L2 ID，则第二无线网络设备可以根据第一无线网络设备提供的L2 ID，判断所述第二数据包对应的第一无线接口的L2 ID是否为第一无线网络设备管辖。针对第二数据包的目的节点为多节点，即多播情况，第二无线网络设备可以根据事先和第一无线网络设备交互的业务标识(例如MBMS session ID，TMGI等)，和所述第二数据包携带的业务标识或承载所述第二数据包的无线数据承载所关联的业务标识(例如在建立无线数据承载时，无线数据承载和业务标识一一对应)，进行匹配。当匹配时，第二无线网络设备将所述第二数据包转发给第一无线网络设备，之后第二无线网络设备根据所述业务标识进行组播。
第三种协议栈架构，承载第一通道的第一无线接口为第二终端设备和第一终端设备直接通信的直连无线接口，承载第二通道的第二无线接口为无线网络设备和第一终端设备之间通信的无线接口，承载第三通道的第三无线接口为第二终端设备与无线网络设备之间通信的无线接口。第一终端设备和第二终端设备均属于该无线网络设备管辖。
参见图5所示，为第一终端设备、第二终端设备以及无线网络设备中的协议层架构示意图。图5仅仅示出第一终端设备、第二终端设备以及无线网络设备中与本申请实施例相关的协议层，第一终端设备、第二终端设备以及无线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。
在该协议栈架构下无需增加任何协议层。第一终端设备和第二终端设备中的汇聚协议层PDCP层，即第一终端设备中的第一通道和第二通道共用同一PDCP层，第二终端设备中的第一通道和第三通道共用同一PDCP层。
图5所示的协议栈架构可以适用于上述确定第一通道和第二通道具有映射关系的第二种可能的方式，即第一终端设备接收无线网络设备发送的第二配置信息，该第二配置信息用于指示第一通道和第二通道之间具有映射关系。第二配置信息中可以包括第一通道的标 识信息(例如LTE PC5 LCID或NR PC5 LCID)和第二通道的标识信息(例如LTE Uu LCID/DRB ID，或NR Uu LCID/DRB ID)的对应关系。
第三种协议栈可以理解为对上述第一种协议栈和第二种协议栈进行改进，通过无线网络设备配置的方式替代适配层通知第一终端设备所述第一通道和第二通道的映射关系。
可选的，在S201之前，所述方法还可以包括：所述第一终端设备接收无线网络设备发送的第二配置信息，该第二配置信息用于指示第一通道和第二通道之间具有映射关系。
可选的，上述第一终端设备和第二终端设备分别所属的无线网络设备相同时，上述发送第二配置信息的无线网络设备为第一终端设备和第二终端设备所属的无线网络设备；第一终端设备和第二终端设备分别所属的无线网络设备不同时，上述发送第二配置信息的无线网络设备为第一终端设备接入的第一无线网络设备。
第一终端设备和第二终端设备所属的无线网络设备不同时，第二终端设备接入的第二无线网络设备可以通过控制面信令或者通过用户面转发隧道的协议头(例如GTP-U协议头)将第一通道的标识信息、源信息和目的信息发送给第一无线网络设备，从而第一无线网络设备根据目的信息确定接收端(第一终端设备)，接着确定和第一通道具有映射关系的第二通道，从而将确定的第一通道和第二通道的映射关系通知第一终端设备。
可选地，第二终端设备可以通过图3所述的协议栈架构下中所述的可能的方式1来获知第一通道和第三通道具有映射关系，此处不再赘述。
在本申请实施例中，通过无线网络设备配置第一通道和第二通道之间的映射关系，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。
图5所示的协议栈架构还可以适用于上述确定第一通道和第二通道具有映射关系的第三种可能的方式，第一数据包的汇聚协议层携带的汇聚标识和第二数据包的汇聚协议层携带的汇聚标识相同。汇聚标识用于指示携带该汇聚标识的数据包所属的数据承载。其中，汇聚协议层为PDCP层。
第二终端设备在PDCP层，对待发送数据包进行复制处理后得到第一数据包和第二数据包。其中，第一数据包的PDCP层包括第一汇聚标识，第一汇聚标识用于指示所述第一数据包所属的无线数据承载或PDCP实体；所述第二数据包的PDCP层包括第二汇聚标识，第二汇聚标识用于指示所述第二数据包所属的无线数据承载或PDCP实体。若第一汇聚标识和第二汇聚标识相同时，所述第一通道与所述第二通道具有映射关系。其中第一汇聚标识和第二汇聚标识相同时，可以均为用于汇聚的PDCP层的标识，或者为相同的无线承载标识(比如DRB ID)。
第二终端设备将第一数据包通过第一通道发送给第一终端设备，将第二数据包通过第三通道发送给无线网络设备，无线网络设备接收到第二数据包后，经过PHY/MAC/RLC层处理，对PDCP层不做任何处理，即PDCP层对于无线网络设备透传。接着根据第二通道的配置，将所述携带PDCP层的第二数据包送入RLC/MAC/PHY层处理后，通过第二通道将第二数据包发送给第一终端设备。
第一终端设备在接收到第一数据包和第二数据包后，确定第一数据包的PDCP层携带的第一汇聚标识和第二数据包的PDCP层携带的第二汇聚标识相同，从而两个数据包在同一PDCP层进行数据汇聚处理。
可选地，第二终端设备可以通过图3所述的协议栈架构下中所述的可能的方式1来获知第一通道和第三通道具有映射关系，此处不再赘述。
第四种协议栈架构，承载第一通道的第一无线接口为第二终端设备和第一终端设备直接通信的直连无线接口，承载第二通道的第二无线接口为无线网络设备和第一终端设备之间通信的无线接口，承载第三通道的第三无线接口为第二终端设备与无线网络设备之间通信的无线接口。第一终端设备和第二终端设备均属于该无线网络设备管辖。
参见图6所示，为第一终端设备、第二终端设备以及无线网络设备中的协议层架构示意图。图6仅仅示出第一终端设备、第二终端设备以及无线网络设备中与本申请实施例相关的协议层，第一终端设备、第二终端设备以及无线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。
在图6中，第一终端设备和第二终端设备之间承载在直连无线接口的第一通道对应的协议栈架构中增加适配层(adaption layer)，其中适配层可以位于分组数据汇聚协议(packet data convergence protocol，PDCP)层和无线链路控制协议(radio link control，RLC)层之间。可选的，在第一终端设备以及第二终端设备的第一通道的PDCP层和RLC层之间均配置有适配层。其中，第一终端设备中第一通道和第二通道共用同一PDCP层，第二终端设备中的第一通道和第三通道共用同一PDCP层。
图6所示的协议栈架构可以适用于上述确定第一通道和第二通道具有映射关系的第四种可能的方式，即第一数据包的适配层携带所述第二通道的标识信息。
以下，在第一种可能的方式下，对通过三个通道传输数据包的过程进行详细说明。
第二终端设备在PDCP层，对待发送数据包进行复制处理后得到第一数据包和第二数据包。
第二终端设备在第一通道的适配层为第一数据包添加第二通道的标识信息。针对第二数据包，由于在第二通道和第三通道未配置适配层，从而针对第二数据包不会经过适配层，而是直接到达RLC层，经过第三通道的RLC层以及RLC层之下的各个实体处理后，通过第三无线接口发送给无线网络设备，从而无线网络设备通过第二无线接口的第二通道发送给第一终端设备。
可选地，第一终端设备和第二终端设备所属的无线网络设备相同时，在第二终端设备发送第一数据包之前，无线网络设备确定第二无线接口的第二通道的标识信息后，将第二通道的标识信息发送给第二终端设备。第一终端设备和第二终端设备所属的无线网络设备不同时，上述无线网络设备包括第一终端设备接入的第一无线网络设备以及第二终端设备接入的第二无线网络设备。第一终端设备接入的第一无线网络设备在确定第二无线接口的第二通道的标识信息后，将第二通道的标识信息和第一终端设备的地址信息发送给第二终端设备接入的第二无线网络设备。第二无线网络设备在接收到该第二通道的标识信息和第一终端设备的地址信息后，根据第一终端设备的地址信息以及自身保留的第一终端设备和第二终端设备的关联关系，将所述第二通道的标识信息发送给第一终端设备对应的第二终端设备。针对第一终端设备的目的信息的描述具体参见图3所对应的实施例，此处不再赘述。
之后，第二终端设备将携带第二通道的标识信息的第一数据包传输至第二终端设备的第一通道的RLC层中的RLC实体，经过第一通道的RLC层以及RLC层之下的各个实体 处理后，通过第一无线接口发送给第一终端设备。
可选的，第一数据包和第二数据包在RLC层及RLC层之下的处理过程，可与现有技术中，传输数据包的过程基本相同，在此不再赘述。
第一终端设备在通过第一通道接收到第一数据包后，确定第一数据包的适配层中携带所述第二通道的标识信息，从而确定所述第一通道和所述第二通道之间具有映射关系，进而所述第一终端设备将通过第一通道接收到的第一数据包和通过第二通道接收到的第二数据包均传输至同一汇聚协议层实体进行数据汇聚处理，即在同一PDCP层实体进行数据汇聚。
可选的，在采用适配层来通知第一终端设备所述第一通道和第所述二通道具有映射关系的情况下，第一终端设备需要获知适配层的存在，从而能够从第一数据包的适配层获取第二通道的标识信息。一种获知适配层存在的方式是：无线网络设备向第一终端设备发送指示信息，指示信息用于指示第一终端设备的第一无线接口的第一通道配置有适配层。示例性的，无线网络设备可以在RRC消息中携带该指示信息，或者将该指示信息包括在下行控制信息(Downlink Control Information，DCI。另一种获知适配层存在的方式是：在无线网络设备转发第二数据包给第一终端设备时，在第二数据包的RLC头或MAC子头中携带该指示信息。再一种获知适配层存在的方式是：无线网络设备可以在向第一终端设备发送第一无线接口的第一通道时，即配置第一终端设备第一通道有适配层。
第一终端设备的PDCP实体对第一数据包和第二数据包进行数据汇聚，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，即第一数据包是第二数据包的复制，或者第二数据包是第一数据包的复制，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。若第一数据包和第二数据包不是基于同一数据包生成的，即第一数据包和第二数据包的序列号不同，则第一终端设备的PDCP实体对所述第一数据包和第二数据包进行重排序处理。
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，对通过第一通道和第二通道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，详细汇聚过程，此处不再赘述。
可选地，第二终端设备可以通过图3所述的协议栈架构下中所述的可能的方式1来获知第一通道和第三通道具有映射关系，此处不再赘述。
在通信标准R14V2X中，发送端和接收端之间可以采用应用层加密。基于此，在PC5接口和Uu口接口都不加密，或者PC5接口和Uu接口都加密，例如统一使用PC5口的加密机制。目前，协议可以规定发送端向接收端传输数据包时，PC5接口和Uu接口的PDCP层是否需要加密。或者无线网络设备可以通过RRC消息配置发送端和接收端，两个接口的PDCP层是否需要加密或者解密，例如可以是UE粒度或DRB粒度的PDCP层安全开关，或者包含PDCP完保开关(完保是指数据的完整性保护)和PDCP层加密开关。开关(安全开关或者完保开关或者加密开关)可以通过0或1指示，比如0表示未开启，1表示关闭，相反亦可以。开关也可以是开启的时候携带指示信息(用于指示开关为开启状态)，不开启的时候不携带该指示信息。
另外，需要说明的是，采用PC5接口进行通信时，一般PDCP层不加密。而采用LTE或NR空口时，例如LTE-Uu接口则使用现有的空口安全机制即PDCP层加密。也就是说，采用PC5接口+Uu接口传输数据包时，可能两个接口对应的通道的安全机制不同。基于此， 本申请实施例中考虑在PDCP层之上额外增加一个协议层，该协议层可以称为汇聚层(aggregation layer或者convergence layer)，当然可以采用其他的名称，本申请实施例对此不作具体限定。以下针对增加汇聚层的协议栈架构进行描述。
新增的汇聚层具有如下功能：1)对于发送端而言，增加汇聚层协议头，里面包含汇聚层序列号；2)对于发送端而言，在增加汇聚层协议头之后，对数据包进行复制(可选功能)；3)对于发送端而言，将经过处理的数据包分别送往一个或多个关联的PDCP实体。特别地，如果经历了复制处理，则发送端将具有相同SN号的数据包分别送往两个或多个关联的PDCP实体；4)对于接收端而言，对接收到的数据包进行重排序功能；5)对于接收端而言，对接收到的数据包进行重复包检测功能。当特定SN号的数据包重复出现时，删除重复出现的数据包，只保留一份所述SN号对应的数据包。
第五种协议栈架构可以理解为是针对第一种协议栈架构的改进，第五种协议栈架构中第一终端设备和第二终端设备均增加用于数据分流汇聚的汇聚层。在第五种协议栈架构与第一种协议栈架构不同的是：适配层可以位于PDCP层之上。示例性的，参见图7所示，在第一终端设备以及无线网络设备的第二通道的PDCP层上均配置有适配层，在第二终端设备以及无线网络设备的第三通道的PDCP层上均配置有适配层。其中，第一终端设备中第一通道和第二通道共用同一汇聚层，该汇聚层是在原有协议栈基础上新增的，第二终端设备中的第一通道和第三通道同样共用同一汇聚层。其中汇聚层位于适配层之上。针对LTE系统来说，汇聚层位于PDCP层之上，针对NR系统来说，汇聚层位于服务数据适配协议(Service Data Adaptation Protocol，SDAP)层和PDCP层之间，图7中以NR系统为例进行说明。
相比图3所示的协议栈架构来说，不仅仅是适配层的位置进行了变更，而负责分流汇聚数据的汇聚协议层不再是PDCP层，而是由新增的汇聚层来实现。汇聚层是为承载特定的，在发送端的汇聚层增加了复制数据包的功能，并将复制或未经复制的数据包通过不同的通道分发；并在接收端的汇聚层增加了汇聚数据包的功能。
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，其它部分可以参见对图3所示的协议栈中的说明，此处不再赘述。
图7所示的第五种协议栈架构也可以适用于上述确定第一通道和第二通道具有映射关系的第一种可能的方式，则第二数据包的适配层携带所述第一通道的标识信息。
第二终端设备在汇聚层，对待发送数据包进行复制处理后得到第一数据包和第二数据包。
第二终端设备在第二通道的适配层为第二数据包添加第一通道的标识信息。
可选地，第二终端设备还可以在第二通道的适配层为第二数据包添加源信息，目的信息。
之后，第二终端设备将携带第一通道的标识信息的第二数据包传输至第二终端设备的第三通道的PDCP层中的PDCP层实体，经过第三通道的PDCP层以及PDCP层之下的各个实体处理后，通过第三无线接口发送给无线网络设备。
可选的，第一数据包和第二数据包在PDCP层及PDCP层之下的处理过程，可与现有技术中，传输数据包的过程基本相同，在此不再赘述。
无线网络设备在通过承载在第三无线接口的第三通道接收到所述第二数据包后，根据 无线网络设备中的适配层携带的目的信息，确定第二数据包的第一终端设备，从而确定所述无线网络设备与所述第一终端设备通信的第二通道。所述无线网络设备将携带第一通道的标识信息的第二数据包发送给第一终端设备。在确定所述无线网络设备与所述第一终端设备通信的第二通道时，无线网络设备在根据目的信息确定第一终端设备后，决定第一通道与第二通道之间的映射关系，从而获得所述无线网络设备与所述第一终端设备通信的第二通道。
第一终端设备在通过第二通道接收到第二数据包后，确定第二数据包的适配层中携带所述第一通道的标识信息，从而确定所述第一通道和所述第二通道之间具有映射关系，进而所述第一终端设备将通过第一通道接收到的第一数据包和通过第二通道接收到的第二数据包均传输至同一汇聚协议层实体进行数据汇聚处理，即在同一汇聚层实体进行数据汇聚。
类似图3所示的方法，上述第一通道的标识信息也可以通过其他方式携带，例如通过第三通道的MAC子头携带。原本第三通道的MAC子头携带了第三通道的逻辑信道标识。通过在第三通道MAC子头额外增加第一通道的标识信息，确定第一通道和第三通道存在映射关系。无线网络设备获取第一通道和第三通道的映射关系后，再决定第一通道和第二通道的映射关系。将所述第一通道的标识信息增加在第二通道的MAC子头中。接收端根据第二通道的MAC子头携带的第二通道的逻辑信道标识和第一通道的标识信息，确定第一通道和第二通道存在映射关系。
参见图8所示，第六种协议栈架构与图7所示的第五种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六种协议栈架构的介绍，与图7所示的第五种协议栈的区别在于第二终端设备在通过第三通道以及第二通道向第一终端设备发送第二数据包的过程中，经过第二无线网络设备以及第一无线网络设备的转发。具体的转发流程可以参见图4所示的实施例中的说明，此处不再赘述。
第七种协议栈架构可以理解为是对于第三种协议栈架构的进行了改进，该第七种协议栈架构中在第一终端设备和第二终端设备中增加了汇聚层。汇聚层位于PDCP层之上。第一终端设备中第一通道和第二通道共用同一汇聚层，第二终端设备中的第一通道和第三通道共用同一汇聚层。
图9所示的第七种协议栈架构可以适用于上述确定第一通道和第二通道具有映射关系的第二种可能的方式，即第一终端设备接收无线网络设备发送的配置信息，该配置信息用于指示第一通道和第二通道之间具有映射关系。配置信息中可以包括第一通道的标识信息和第二通道的标识信息的对应关系。
应理解，图9仅仅示出了第一终端设备和第二终端设备中协议栈架构，由于在第七种协议栈架构中无线网络设备的协议栈架构同现有的协议栈架构，在此不再赘述。
图9所示的第七种协议栈架构与图5所示的第三种协议栈架构唯一不同的是：第二终端设备在新增的汇聚层对待发送的数据包进行复制和/或分流处理，进而第一终端设备在新增的汇聚层对第一数据包和第二数据包进行数据汇聚处理，其它的处理方法与图5所示的第三种协议栈架构下的处理方法类似，此处不再赘述。
参见图10A所示，第八种协议栈架构可以理解为是对于第四种协议栈架构的进行了改 进，该第八种协议栈架构中在第一终端设备和第二终端设备中增加了汇聚层。汇聚层位于PDCP层之上。第一终端设备中第一通道和第二通道共用同一汇聚层，第二终端设备中的第一通道和第三通道共用同一汇聚层。
图10A所示的第八种协议栈架构也可以适用于上述确定第一通道和第二通道具有映射关系的第四种可能的方式。
图10A所示的第八种协议栈架构与图6所示的第四种协议栈架构唯一不同的是：第二终端设备在新增的汇聚层对待发送的数据包进行复制和/或分流处理，进而第一终端设备在新增的汇聚层对第一数据包和第二数据包进行数据汇聚处理，其它的处理方法与图6所示的第四种协议栈架构下的处理方法类似，此处不再赘述。
另外，需要说明的是，当无线网络设备通过组播方式将所述第二数据包发送给多个第一终端设备时，空口可以只包含RLC/MAC/PHY协议层，而不需要包含PDCP层。例如图7或图8或图9或图10A中，在第一终端设备和无线网络设备(或第一无线网络设备)之间不包含PDCP协议层。
特别地，当仅在第二通道和第三通道配置适配层时，即适配层只包含第二通道的标识信息时，协议栈增加的所述适配层可以对无线网络设备透传，即适配层只存在于第一终端设备和第二终端设备上。比如，针对图3所示第一种协议栈架构，可以在无线网络设备上不配置适配层，如图10B所示，第二终端设备和无线网络设备之间，第一终端设备和无线网络设备(或第一无线网络设备)之间，不存在适配层。同理，针对图4或者图7或者图8所示的协议栈架构也同样适用，此处不再赘述。
在上文介绍的第一种协议栈架构至第八种协议栈架构中，都是基于第一无线接口为直连接口，第二无线接口为非直连无线接口的方式介绍的。在本申请实施例中，上述第一无线接口和第二无线接口都可以为直连无线接口，比如第一无线接口为LTE制式中的直连无线接口，第二无线接口为NR制式中的直连无线接口。
当第一无线接口为LTE制式中的直连无线接口，第二无线接口为NR制式中的直连无线接口时，承载在两个接口上的通道对应的协议栈架构是相同的。
图11示出了本申请实施例的第九种协议栈架构的示意性框图，两个无线接口均为直连无线接口。承载在其中一个无线接口的通道对应的协议栈架构中增加适配层，适配层位于PDCP层和RLC层之间。图11中以第一无线接口的第一通道对应的协议栈架构中增加适配层为例。其中，第一终端设备和第二终端设备中的第一通道和第二通道均共用同一PDCP层。
图11所示的协议栈架构可以适用于上述确定第一通道和第二通道具有映射关系的第一种可能的方式，则第一通道上的第一数据包的适配层携带所述第二通道的标识信息。
当然，若在承载在第二无线接口的第二通道增加适配层，则可以在第二通道的第二数据包的适配层携带第一通道的标识信息。
以下对通过两个通道传输数据包的过程进行详细说明。
第二终端设备在PDCP层，对待发送数据包进行复制处理后得到第一数据包和第二数据包。
第二终端设备在第一通道的适配层为第一数据包添加第二通道的标识信息。针对第二数据包，由于在第二通道未配置适配层，从而针对第二数据包不会经过适配层，而是直接 到达RLC层，经过第二通道的RLC层以及RLC层之下的各个实体处理后，通过第二无线接口发送给第一终端设备。
之后，第二终端设备将携带第二通道的标识信息的第一数据包传输至第二终端设备的第一通道的RLC层中的RLC实体，经过第一通道的RLC层以及RLC层之下的各个实体处理后，通过第一无线接口发送给第一终端设备。
可选的，第一数据包和第二数据包在RLC层及RLC层之下的处理过程，与现有技术中，传输数据包的过程基本相同，在此不再赘述。
第一终端设备在通过第一通道接收到第一数据包，以及通过第二通道接收到第二数据包后，确定第一数据包的适配层中携带所述第二通道的标识信息，从而确定所述第一通道和所述第二通道之间具有映射关系，进而所述第一终端设备将通过第一通道接收到的第一数据包和通过第二通道接收到的第二数据包均传输至同一汇聚协议层实体进行数据汇聚处理，即在同一PDCP层实体进行数据汇聚。
可选的，在采用适配层来通知第一终端设备所述第一通道和第所述二通道具有映射关系的情况下，第一终端设备需要获知适配层的存在，从而能够从第一数据包的适配层获取第二通道的标识信息。获知适配层存在的方式，包括：无线网络设备向第一终端设备发送指示信息，指示信息用于指示第一终端设备的第一无线接口的第一通道配置有适配层。示例性的，无线网络设备可以在RRC消息中携带该指示信息，或者将该指示信息包括在下行控制信息(Downlink Control Information，DCI)，或者第二终端设备直接在物理旁路控制信道(Physical Sidelink Control Channel，PSCCH)包含的旁路控制信息(sidelink control information，SCI)中携带所述指示。
第一终端设备的PDCP实体对第一数据包和第二数据包进行数据汇聚，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，即第一数据包是第二数据包的复制，或者第二数据包是第一数据包的复制，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。若第一数据包和第二数据包不是基于同一数据包生成的，即第一数据包和第二数据包的序列号不同，则第一终端设备的PDCP实体对所述第一数据包和第二数据包进行重排序处理。
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，对通过第一通道和第二通道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，详细汇聚过程，此处不再赘述。
可选地，第二终端设备可以通过图3所述的协议栈架构下中所述的可能的方式1或者可能的方式2来获知第一通道和第二通道具有映射关系，此处不再赘述。
图12示出了本申请实施例的第十种协议栈架构的示意性框图，第十种协议栈架构可以理解为是对第九种协议栈架构的改进。在第十种协议栈架构与第九种协议栈架构不同的是：适配层可以位于PDCP层之上，另外，第一终端设备和第二终端设备中第一通道和第二通道共用同一汇聚层，该汇聚层是在原有协议栈基础上新增的。其中汇聚层位于适配层之上。针对LTE系统来说，汇聚层位于PDCP层之上，针对NR系统来说，汇聚层位于SDAP层和PDCP层之间，图12中以NR系统为例进行说明。相比第九种协议栈架构来说，负责分流汇聚数据的汇聚协议层不再是PDCP层，而是由新增的汇聚层来实现。针对通过两个通道发送数据包的过程此处不再赘述。
图13示出了本申请实施例的第十一种协议栈架构的示意性框图，在图13所示的协议 栈架构中第一无线接口的第一通道对应的协议栈和第二无线接口的第二通道对应的协议栈，与图11所示的第九种协议栈架构中第一通道对应的协议栈的架构相同。图13所示的协议栈架构可以适用于上述确定第一通道和第二通道具有映射关系的第三种可能的方式，则第一通道上的第一数据包的适配层携带第一汇聚标识，第二通道上的第二数据包的适配层携带第二汇聚标识，汇聚标识用于指示携带该汇聚标识的数据包所属的数据承载。其中，汇聚协议层为PDCP层。可以看出，在图13所示的协议栈架构中第一无线接口的第一通道对应的协议栈和第二无线接口的第二通道对应的协议栈，与第四种协议栈架构中第一无线接口的第一通道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十种协议栈架构中关于通过第一无线接口的第一通道传输数据包的过程，在此不再赘述。
图14示出了本申请第十二种协议栈架构的示意性框图，第十二种协议栈架构可以理解为是对第十一种协议栈架构的改进。在第十二种协议栈架构与第十一种协议栈架构不同的是：适配层可以位于PDCP层之上，另外，第一终端设备和第二终端设备中第一通道和第二通道共用同一汇聚层，该汇聚层是在原有协议栈基础上新增的。其中汇聚层位于适配层之上。针对LTE系统来说，汇聚层位于PDCP层之上，针对NR系统来说，汇聚层位于SDAP层和PDCP层之间，图14中以NR系统为例进行说明。相比第十一种协议栈架构来说，负责分流汇聚数据的汇聚协议层不再是PDCP层，而是由新增的汇聚层来实现。针对通过两个通道发送数据包的过程此处不再赘述。可以看出，在图14所示的协议栈架构中第一无线接口的第一通道对应的协议栈和第二无线接口的第二通道对应的协议栈，与第十种协议栈架构中第一无线接口的第一通道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十种协议栈架构中关于通过第一无线接口的第一通道传输数据包的过程，在此不再赘述。
第二终端设备启动通过多个通道向第一终端设备发送需要汇聚的数据包需要时机，一种方式是由无线网络设备指示给第二终端设备，第二终端设备接收到指示时开启，另一种方式是由第二终端设备自行决策什么时候启动。
针对由无线网络设备决策，通知第二终端设备，具体过程包括如下：
无线网络设备向第二终端发送的双连接指示，该双连接指示用于指示第二终端设备通过多个通道向第一终端设备发送需要汇聚的数据包。第二终端设备在接收到双连接指示后，执行分别通过第一通道向第一终端设备发送第一数据包，和通过第二通道(或者第三通道)向第一终端设备发送第二数据包。其中第一通道和第二通道(或者第一通道和第三通道)之间的映射关系可以采用上述可能的方式1和可能的方式2，此处不再赘述。另外，在采用可能的方式1时，无线网络设备可以通过一条消息将第一配置信息和双连接指示发送给第二终端设备，第一配置信息用于指示第一通道和第三通道具有映射关系；也可以通过不同的消息将第一配置信息和双连接指示发送给第二终端设备。
当然无线网络设备将第一配置信息和双连接指示合并为一条信息，即发送第一配置信息即指示第二终端设备可以通过多个通道向第一终端设备发送需要汇聚的数据包。由于无论Uu接口的LCID还是PC5接口的LCID，都有对应的DRB ID或汇聚层标识或PDCP层标识。例如Uu接口的LCID，PC5接口的LCID，对应相同的DRB ID或汇聚层标识或PDCP层标识，则一方面，指示Uu接口LCID标识的通道和PC5接口LCID标识的通道具有映射关系，另一方面指示双连接。
比如，第一配置信息包括Uu接口LCID以及对应的DRB标识(served Radio bearer)， PC5接口的LCID以及对应的served Radio bearer。如果两者对应相同的DRB标识，则一方面指示双连接，另一方面指示Uu接口LCID和PC5接口的LCID具有映射关系。
再比如，第一配置信息中包括Uu接口的LCID和PC5接口的LCID(或PC5接口的LCID list)，该Uu接口LCID存在对应的DRB ID或汇聚层标识或PDCP层标识，则一方面指示双连接，另一方面指示Uu接口LCID和PC5接口的LCID具有对应关系。再比如，第一配置信息中包含Uu接口的LCID，PC5接口LCID以及served Radio bearer(DRB标识)。
或者除了上述方式之外，针对只有1条Uu接口的通道和1条PC5接口的通道的情况，无线网络设备可以仅向第二终端设备发送双连接指示，则第二终端设备则确定该PC5的通道和Uu接口的通道具有映射关系。
同理，针对两个通道均承载在PC5接口的情况，无线网络设备也可以按照上述方式发送第一配置信息和/或双连接指示，此处不再赘述。
可选地，无线网络设备可以通过RRC消息或者广播的方式将双连接指示发送给第二终端设备。
可选的，所述无线网络设备确定所述第二终端设备上报的至少一个参数满足预设规则时，向第二终端设备发送双连接指示。
其中，所述预设规则包括但不仅限于如下1)至7)中至少一项，具体可以是如下1)至7)中任一项，或者任两项，或者任三项，或者任四项，或者任五项，或者任六项，或者七项全包括，或者还可以为其它的规则。
1)、所述第二终端设备当前传输的数据包对应的近距离服务包优先级(ProSe per Packet Priority，PPPP)小于第一阈值；
2)、所述第二终端设备当前传输的数据包对应的近距离服务包可靠性(ProSe Per-Packet Reliability，PPPR)小于第二阈值；
3)、所述第二终端设备的当前采用的接口的信道忙比例(Channel busy Ratio，CBR)大于第三阈值；
4)、所述第二终端设备的当前未采用的其中一接口的CBR小于第四阈值；
5)、所述第二终端设备的当前采用的接口的信号强度小于第五阈值；
6)、所述第二终端设备的未采用的其中一接口的信号强度高于第六阈值；
7)、所述第二终端设备或第二终端设备的其中一通道的待传数据包数量大于第七阈值。
可选地，无线网络设备可以在确定第二终端设备不满足预设规则时，向第二终端设备发送关闭双连接指示。比如在预设规则包括上述其中一项时，则确定第二终端设备不满足该项中的条件时，则向第二终端设备发送关闭双连接指示，再比如在预设规则包括上述其中两项时，则确定第二终端设备不满足该两项中其中任一项时，则向第二终端设备发送关闭双连接指示，或者在确定第二终端设备不满足该两项的条件时，才向第二终端设备发送关闭双连接指示。
针对由第二终端设备自行决策什么时候启动，具体过程包括如下：
无线网络设备可以预先配置给第二终端设备双连接开启规则，从而第二终端设备在确定满足双连接开启规则时，开启通过多个通道向第一终端设备发送需要汇聚的数据包。
可选的，无线网络设备确定双连接开启规则；所述无线网络设备将所述双连接开启规 则发送给第二终端设备，所述双连接开启规则用于指示所述第二终端设备在确定满足所述双连接开启规则时，开启通过两个通道向所述第一终端设备发送需要汇聚的数据包。
其中，所述双连接开启规则包括如下任一项或任意多项：
所述第二终端设备当前传输的数据包对应的近距离服务包优先级PPPP小于第一阈值；
所述第二终端设备当前传输的数据包对应的近距离服务包可靠性PPPR小于第二阈值；
所述第二终端设备的当前采用的接口的信道忙比例CBR大于第三阈值；
所述第二终端设备的当前未采用的其中一接口的信道忙比例CBR小于第四阈值；
所述第二终端设备的当前采用的接口的信号强度小于第五阈值；
所述第二终端设备的当前未采用的其中一接口的信号强度高于第六阈值；
所述第二终端设备或第二终端设备的其中一通道的待传数据包数量大于第七阈值。
可选地，无线网络设备还可以预先配置给第二终端设备双连接关闭规则，从而第二终端设备在开启双连接后，确定满足双连接关闭规则时，则关闭双连接。
双连接关闭规则，可以与双连接开启规则相对应，比如双连接开启规则包括上述其中一项时，则第二终端设备确定不满足该项中的条件时，则关闭双连接，再比如在双连接规则包括上述其中两项时，则第二终端设备确定不满足该两项中其中任一项时，则关闭双连接指示，或者第二终端设备在确定不满足该两项的条件时，才向第二终端设备发送关闭双连接指示。
在一种可能的实现方式中，在上述确定第一通道和第三通道具有映射关系的可能方式2中，在第二终端设备基于双连接开启规则，确定启动双连接时，第二终端设备可以自行确定PC5接口的哪个通道和Uu接口的哪个通道绑定。在两个无线接口均为直连接口的情况下，第二终端设备在确定启动双连接时，还可以自行确定LTE PC5接口的哪个通道和NR PC5接口的哪个通道绑定。比如，确定当前采用的接口的信号强度小于第五阈值，而未采用的某一接口的信号强度高于第六阈值，从而第二终端设备可以确定该当前采用的接口其中一通道和未采用的某一接口的其中一通道具有映射关系。再比如，所述第二终端设备的当前采用的接口的CBR大于第三阈值，而所述第二终端设备的当前未采用的某一接口的CBR小于第四阈值，从而第二终端设备可以确定该当前采用的接口其中一通道和未采用的某一接口的某一通道具有映射关系。另外，如果第二终端设备和第一终端设备之间存在的两个无线接口均只有一个通道，则确定该两个无线接口分别对应的通道之间具有映射关系。在此情况下，若第二终端设备与第一终端设备之间两个通信接口分别为直连无线接口和非直连无线接口时，则可以采用图3所示的第三种协议栈架构所描述的处理方式，还可以采用图5所示的第三种协议栈架构所描述的处理方式，采用图7所示的第五种协议栈架构所描述的处理方式，或者采用图9所示的第七种协议栈架构所描述的处理方式。若第二种终端设备和第一终端设备之间两个通信接口均为直连无线接口，则可以采用图11所示的第九种协议栈架构所描述的处理方式，或者采用图12所述的第十种协议栈架构所描述的处理方式。此处不再赘述。
在一种可能的实施方式中，第二终端设备在开启通过多个通道向第一终端设备发送需要汇聚的数据包时，可以获取该多个通道对应的传输资源，比如，对于PC5接口的通道的传输资源的获取，如果第二终端设备采用的模式是mode 3，mode3指的是无线网络设备支持终端设备申请传输资源，则第二终端设备可以分别向LTE制式的无线网络设备/NR制式的无线网络设备申请。如果第二终端设备采用的模式是mode 4，mode4指的是无线网络设 备不支持终端设备申请传输资源，因此终端设备需要自己选择传输资源，则第二终端设备可以在LTE制式下和NR制式下无线网络设备分别提供的资源池(resource pool)中自行选择传输资源。或者当第二终端设备在一个制式下采用的模式是mode 3，另一个制式下采用的模式是mode 4。例如第二终端设备在LTE制式下是mode3，在NR制式下是mode4。则第二终端设备可以向LTE制式申请传输资源，在NR制式下无线网络设备给出的资源池中自行选择。
基于与上述方法实施例同样的发明构思，如图15所示，本申请还提供一种通信装置500，可包括收发单元1501和处理单元1502。
在一种可能的实施方式中，该通信装置1500可应用于第一终端设备，收发单元1501，可用于通过第一通道和第二通道接收来自第二终端设备的第一数据包和第二数据包，或者，该接收来自无线网络设备的配置信息等；处理单元1502，可用于对第一数据包和第二数据包进行处理，比如数据汇聚处理，具体处理单元1502可用于实现上述图2-图14任一实施例所述第一终端设备所执行的功能。
在一种可能的实施方式中，该通信装置1500可应用于第二终端设备，处理单元1502，可用于产生数据包以及在数据包的相应的层添加信息，具体可以用于实现上述图2-图14中任一实施例所述的第二终端设备所执行的功能；收发单元1501，可用于通过两个不同的通道向第一终端设备发送该第一数据包和第二数据包。
在一种可能的实施方式中，该通信装置1500可应用于无线网络设备，收发单元1501可用于接收来自第二终端设备的第二数据包，处理单元1502可用于针对第二数据包进行处理，具体处理过程可以参见图2-图14中任一实施例中所述无线网络设备所执行的处理功能。处理单元1502对第二数据包进行处理后通过收发单元1501将第二数据包发送给第一终端设备。
基于相同的构思，如图16所示，为本申请提供的一种通信装置1600。该通信装置1600可以应用于第一终端设备，具体通信装置1600可以是第一终端设备，也可以是能够支持第一终端设备实现图2-图14涉及的方法中第一终端设备的功能的装置。该通信装置1600可以应用于第二终端设备，具体通信装置1600可以是第二终端设备，也可以是能够支持第二终端设备实现图2-图14涉及的方法中第二终端设备的功能的装置。该通信装置1600可以应用于无线网络设备，具体通信装置1600可以是无线网络设备(或者第一无线网络设备或者第二无线网络设备)，也可以是能够支持无线网络设备实现图2-图14涉及的方法中无线网络设备的功能的装置。示例性地，通信装置1600可以是芯片或芯片系统。可选的，在本申请实施例中芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。
通信装置1600中包括至少一个处理器1610，用于实现本申请实施例提供的通信方法中第一终端设备或者第二终端设备或者无线网络设备的功能。装置还可以包括至少一个存储器1620，用于存储程序指令和/或数据。存储器1620和处理器1610耦合。本申请实施例中的耦合是装置、单元或模块之间的间接耦合或通信连接，可以是电性，机械或其它的形式，用于装置、单元或模块之间的信息交互。处理器1610可能和存储器1620协同操作。处理器1610可能执行存储器1620中存储的程序指令。可选的，所述至少一个存储器1620中的至少一个可以包括于处理器1610中。
通信装置1600中还可以包括通信接口1630，通信装置1600可以通过通信接口1630和其它设备进行信息交互。通信接口1630可以是电路、总线、收发器或者其它任意可以 用于进行信息交互的装置。
本申请实施例中不限定上述通信接口1630、处理器1610以及存储器1620之间的具体连接介质。本申请实施例在图16中以存储器1620、处理器1610以及通信接口1630之间通过总线连接，总线在图16中以粗线表示，其它部件之间的连接方式，仅是进行示意性说明，并不引以为限。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图16中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
在本申请实施例中，处理器可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列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，可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本申请实施例所公开的方法的步骤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。
在本申请实施例中，存储器可以是非易失性存储器，比如硬盘(hard disk drive，HDD)或固态硬盘(solid-state drive，SSD)等，还可以是易失性存储器(volatile memory)，例如随机存取存储器(random-access memory，RAM)。存储器还可以是能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。本申请实施例中的存储器还可以是电路或者其它任意能够实现存储功能的装置，用于存储程序指令和/或数据。
根据前述方法，如图17所示，本发明实施例还提供一种无线网络设备，如基站，的结构示意图。
该基站可应用于如图1所示通信系统的场景中。基站1700包括一个或多个射频单元，如远端射频单元(remote radio unit,RRU)1701和一个或多个基带单元(baseband unit，BBU)(也可称为数字单元，digital unit，DU)1702。该RRU1701可以称为收发单元、收发机、收发电路、或者收发器等等，其可以包括至少一个天线17011和射频单元17012。该RRU1701部分可用于射频信号的收发以及射频信号与基带信号的转换，例如用于向终端设备发送上述实施例中所述的信令指示和/或参考信号。该BBU1702部分可用于进行基带处理，对基站进行控制等。该RRU1701与BBU1702可以是物理上设置在一起，也可以物理上分离设置的，即分布式基站。
该BBU1702为基站的控制中心，也可以称为处理单元，可用于完成基带处理功能，如信道编码，复用，调制，扩频等等。例如该BBU(处理单元)可以用于控制基站执行图2至图14任一图所示的无线网络设备执行的方法。
在一个示例中，该BBU1702可以由一个或多个单板构成，多个单板可以共同支持单一接入制式的无线接入网(如LTE网)，也可以分别支持不同接入制式的无线接入网。该BBU1702还包括存储器17021和处理器17022。该存储器17021用以存储必要的指令和数据。例如存储器17021存储上述实施例中的传输时延差的信息与传输时延差的对应关系。该处理器17022用于控制基站进行必要的动作。该存储器17021和处理器17022可以服务于一个或多个单板。也就是说，可以每个单板上单独设置存储器和处理器。也可以是多个单板共用相同的存储器和处理器。此外每个单板上还可以设置有必要的电路。
图18提供了一种终端设备的结构示意图，图18以车辆中的通信装置为例。为了便于说明，图18仅示出了终端设备的主要部件。该终端设备1800可以应用于本申请上述任一实施例所述的第一终端设备或者第二终端设备。如图18所示，终端设备1800可包括处理 器、存储器、控制电路，可选的，还可以包括天线和/或输入输出装置。处理器可用于对通信协议以及通信数据进行处理，以及对终端设备进行控制，执行软件程序，处理软件程序的数据。存储器可用于存储软件程序和/或数据。控制电路可用于基带信号与射频信号的转换以及对射频信号的处理。控制电路和天线一起也可以叫做收发器，可用于收发电磁波形式的射频信号。输入输出装置，例如触摸屏、显示屏，键盘等，可用于接收用户输入的数据以及对用户输出数据。
在本申请实施例中，处理器可以读取存储单元中的软件程序，解释并执行软件程序的指令，处理软件程序的数据。当需要通过无线发送数据时，处理器对待发送的数据进行基带处理后，输出基带信号至射频电路，射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到终端设备时，射频电路通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器，处理器将基带信号转换为数据并对该数据进行处理。
本领域技术人员可以理解，为了便于说明，图18仅示出了一个存储器和处理器。在实际的终端设备中，可以存在多个处理器和存储器。存储器也可以称为存储介质或者存储设备等，本发明实施例对此不做限制。
作为一种可选的实现方式，处理器可以包括基带处理器和中央处理器，基带处理器可用于对通信协议以及通信数据进行处理，中央处理器可用于对整个终端设备进行控制，执行软件程序，处理软件程序的数据。图18中的处理器集成了基带处理器和中央处理器的功能，本领域技术人员可以理解，基带处理器和中央处理器也可以是各自独立的处理器，通过总线等技术互联。本领域技术人员可以理解，终端设备可以包括多个基带处理器以适应不同的网络制式，终端设备可以包括多个中央处理器以增强其处理能力，终端设备的各个部件可以通过各种总线连接。该基带处理器也可以表述为基带处理电路或者基带处理芯片。该中央处理器也可以表述为中央处理电路或者中央处理芯片。对通信协议以及通信数据进行处理的功能可以内置在处理器中，也可以以软件程序的形式存储在存储单元中，由处理器执行软件程序以实现基带处理功能。
示例性的，在发明实施例中，可以将具有收发功能的天线和控制电路视为终端设备1800的收发单元1801，将具有处理功能的处理器视为终端设备1800的处理单元1802。如图18所示，终端设备1800可包括收发单元1801和处理单元1802。收发单元也可以称为收发器、收发机、收发装置等。可选的，可以将收发单元1801中用于实现接收功能的器件视为接收单元，将收发单元1801中用于实现发送功能的器件视为发送单元，即收发单元1801包括接收单元和发送单元示例性的，接收单元也可以称为接收机、接收器、接收电路等，发送单元可以称为发射机、发射器或者发射电路等。
根据本申请实施例提供的方法，本发明实施例还提供一种通信系统，其包括前述的第一终端设备、第二终端设备和无线网络设备中的一个或多个。
基于以上实施例，本申请实施例还提供了一种计算机存储介质，该存储介质中存储软件程序，该软件程序在被一个或多个处理器读取并执行时可实现上述任意一个或多个实施例提供的方法。该计算机存储介质可以包括：U盘、移动硬盘、只读存储器、随机存取存储器、磁碟或者光盘等各种可以存储程序代码的介质。
基于以上实施例，本申请实施例还提供了一种芯片，该芯片包括处理器，用于实现上述任意一个或多个实施例所涉及的功能，例如获取或处理上述方法中所涉及的信息或者消 息。可选地，该芯片还包括存储器，该存储器，用于处理器所执行必要的程序指令和数据。该芯片，可以由芯片构成，也可以包含芯片和其他分立器件。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (23)

  1. 一种通信方法，其特征在于，包括：
    第一终端设备通过第一通道接收由第二终端设备发送的第一数据包，所述第一通道承载在第一无线接口，所述第一无线接口为所述第二终端设备和所述第一终端设备直接通信的无线通信接口；
    所述第一终端设备通过第二通道接收由所述第二终端设备发送的第二数据包，所述第二通道承载在第二无线接口，所述第二无线接口为无线网络设备与所述第一终端设备通信的通信接口，或者所述第二无线接口为所述第二终端设备和所述第一终端设备直接通信的另一无线通信接口；
    其中，所述第一通道与所述第二通道具有映射关系；
    所述第一终端设备根据所述映射关系将所述第一数据包与所述第二数据包传输至同一汇聚协议层实体进行数据汇聚处理。
  2. 如权利要求1所述的方法，其特征在于，通过如下方式确定所述第一通道与所述第二通道具有映射关系：
    若通过所述第二通道接收的所述第二数据包携带所述第一通道的标识信息，则确定所述第一通道与所述第二通道具有映射关系。
  3. 如权利要求2所述的方法，其特征在于，所述第一终端设备的第二通道配置有第一适配层，所述第一适配层位于所述第二通道的分组数据汇聚协议PDCP层之上，或者所述第一适配层位于第二通道的分组数据汇聚协议PDCP层和无线链路控制协议RLC层之间；
    所述第二数据包的所述第一适配层携带所述第一通道的标识信息。
  4. 如权利要求3所述的方法，其特征在于，所述第一通道的标识信息为所述第一通道的逻辑信道标识。
  5. 如权利要求3或4所述的方法，其特征在于，还包括：
    所述第一终端设备获取第一指示信息，所述第一指示信息用于指示在所述第一终端设备的第二通道配置有所述第一适配层。
  6. 如权利要求1所述的方法，其特征在于，还包括：
    所述第一终端设备接收所述无线网络设备发送的配置信息，所述配置信息用于指示所述第一通道与所述第二通道具有映射关系。
  7. 如权利要求6所述的方法，其特征在于，所述配置信息中包括所述第一通道的标识信息与第二通道的标识信息的对应关系；
    其中，所述第一通道的标识信息为所述第一通道的逻辑信道标识；
    所述第二通道的标识信息包括所述第二通道的逻辑信道标识和/或所述第二通道的无线承载标识。
  8. 如权利要求1所述的方法，其特征在于，通过如下方式确定所述第一通道与所述第二通道具有映射关系：
    若通过所述第一通道接收的所述第一数据包携带所述第二通道的标识信息，则确定所述第一通道与所述第二通道具有映射关系。
  9. 如权利要求8所述的方法，其特征在于，所述第一终端设备在第一通道配置有第二适配层，所述第二适配层位于所述第一通道的分组数据汇聚协议PDCP层之上，或者所 述第二适配层位于所述第一通道的PDCP层和RLC层之间；
    所述第一数据包的所述第二适配层携带所述第二通道的标识信息。
  10. 如权利要求9所述的方法，其特征在于，所述第二通道的标识信息包括所述第二通道的逻辑信道标识和/或所述第二通道的无线承载标识。
  11. 如权利要求9或10所述的方法，其特征在于，还包括：
    所述第一终端设备获取第二指示信息，所述第二指示信息用于指示在所述第一终端设备的第一通道配置有所述第二适配层。
  12. 一种通信方法，其特征在于，包括：
    第二终端设备通过第一通道向所述第一终端设备发送第一数据包；
    所述第二终端设备通过第三通道向所述第一终端设备发送第二数据包，所述第二数据包携带所述第一通道的标识信息；
    所述第一通道承载在第一无线接口，所述第一无线接口为所述第二终端设备与第一终端设备直接通信的无线通信接口，所述第三通道承载在第三无线接口，所述第三无线接口为所述无线网络设备和所述第二终端设备通信的无线通信接口，或者所述第三无线接口为所述第一终端设备与所述第二终端设备直接通信的另一无线通信接口；
    其中，所述第一数据包和所述第二数据包由所述第一终端设备进行汇聚处理。
  13. 如权利要求12所述的方法，其特征在于，所述第一通道的标识信息为所述第一通道的逻辑信道标识。
  14. 如权利要求12或13所述的方法，其特征在于，所述第二终端设备的第三通道配置有适配层，所述适配层位于所述第二通道的PDCP层之上，或者所述适配层位于所述第二通道的PDCP层和RLC层之间，在所述第一数据包的所述适配层携带所述第一通道的标识信息。
  15. 如权利要求12-14任一项所述的方法，其特征在于，还包括：
    所述第二终端设备接收所述无线网络设备发送的双连接指示，所述双连接指示用于指示所述第二终端设备通过两个通道向所述第一终端设备发送需要汇聚的数据包。
  16. 如权利要求12-14任一项所述的方法，其特征在于，还包括：
    所述第二终端设备接收所述无线网络设备发送的双连接开启规则；
    所述第二终端设备在确定满足所述双连接开启规则时，开启通过所述第一通道和第三通道向所述第一终端设备发送需要汇聚的数据包；
    其中，所述双连接开启规则包括如下任一项或任几项：
    所述第二终端设备当前传输的数据包对应的近距离服务包优先级PPPP小于第一阈值；
    所述第二终端设备当前传输的数据包对应的近距离服务包可靠性PPPR小于第二阈值；
    所述第二终端设备的当前采用的接口的信道忙比例CBR大于第三阈值；
    所述第二终端设备的当前未采用的其中一接口的信道忙比例CBR小于第四阈值；
    所述第二终端设备的当前采用的接口的信号强度小于第五阈值；
    所述第二终端设备的当前未采用的其中一接口的信号强度高于第六阈值；
    所述第二终端设备或第二终端设备的其中一通道的待传数据包数量大于第七阈值。
  17. 一种通信方法，其特征在于，包括：
    所述第二终端设备接收无线网络设备发送的配置信息，所述配置信息用于表征第一通道和第三通道具有映射关系；
    其中，所述第一通道承载在第一无线接口，所述第一无线接口为所述第二终端设备和所述第一终端设备直接通信的无线通信接口，所述第三通道承载在第三无线接口，所述第三无线接口为所述无线网络设备与所述第二终端设备通信的无线通信接口，或者所述第三无线接口为所述第二终端设备和所述第一终端设备直接通信的另一无线通信接口；
    所述第二终端设备根据所述配置信息分别通过所述第一通道和所述第三通道向所述第一终端设备发送需要汇聚的数据包。
  18. 如权利要求17所述的方法，其特征在于，所述配置信息中包括所述第一通道的标识信息与第三通道的标识信息的对应关系；
    其中，所述第一通道的标识信息为所述第一通道的逻辑信道标识；
    所述第三通道的标识信息包括所述第三通道的逻辑信道标识和/或所述第三通道的无线承载标识。
  19. 一种通信方法，其特征在于，包括：
    无线网络设备确定双连接指示；
    所述无线网络设备向所述第二终端设备发送双连接指示，所述双连接指示用于指示所述第二终端设备通过两个通道向第一终端设备发送需要汇聚的数据包。
  20. 如权利要求19所述的方法，其特征在于，所述无线网络设备向所述第二终端设备发送双连接指示之前，还包括：
    所述无线网络设备确定所述第二终端设备上报的至少一个参数满足预设规则。
  21. 一种通信方法，其特征在于，包括：
    无线网络设备确定双连接开启规则；
    所述无线网络设备将所述双连接开启规则发送给第二终端设备，所述双连接开启规则用于指示所述第二终端设备在确定满足所述双连接开启规则时，开启通过两个通道向所述第一终端设备发送需要汇聚的数据包；
    其中，所述双连接开启规则包括如下中任一项或任几项：
    所述第二终端设备当前传输的数据包对应的近距离服务包优先级PPPP小于第一阈值；
    所述第二终端设备当前传输的数据包对应的近距离服务包可靠性PPPR小于第二阈值；
    所述第二终端设备的当前采用的接口的信道忙比例CBR大于第三阈值；
    所述第二终端设备的当前未采用的其中一接口的信道忙比例CBR小于第四阈值；
    所述第二终端设备的当前采用的接口的信号强度小于第五阈值；
    所述第二终端设备的当前未采用的其中一接口的信号强度高于第六阈值；
    所述第二终端设备或第二终端设备的其中一通道的待传数据包数量大于第七阈值。
  22. 一种通信装置，其特征在于，包括：处理器和存储器；
    所述存储器用于存储计算机执行指令；
    所述处理器用于执行所述存储器所存储的计算机执行指令，以使所述通信装置实现如所述权利要求1至18任一项所述的方法中所述第一终端设备或者所述第二终端设备的功能，或者，如所述权利要求19至21任一项所述的方法中所述无线网络设备的功能。
  23. 一种计算机存储介质，其特征在于，包括计算机可读指令，当所述计算机可读指令被执行时，实现如权利要求1至11任一项所述的方法中的所述第一终端设备的功能，或者，实现如权利要求12至18任一项所述的方法中的所述第二终端设备的功能，或者实现如权利要求19至21任一项所述的方法中的所述无线网络设备的功能。
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