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WO2023065999A1 - Procédé de transmission de données et appareil associé - Google Patents

Procédé de transmission de données et appareil associé Download PDF

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Publication number
WO2023065999A1
WO2023065999A1 PCT/CN2022/122158 CN2022122158W WO2023065999A1 WO 2023065999 A1 WO2023065999 A1 WO 2023065999A1 CN 2022122158 W CN2022122158 W CN 2022122158W WO 2023065999 A1 WO2023065999 A1 WO 2023065999A1
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Prior art keywords
terminal device
data
adaptation layer
identifier
layer entity
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PCT/CN2022/122158
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English (en)
Chinese (zh)
Inventor
潘晓丹
彭文杰
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/23—Manipulation of direct-mode connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user

Definitions

  • the present application relates to the technical field of communications, and in particular to a data transmission method and a related device.
  • the remote terminal device can communicate with the base station through the relay terminal device.
  • the data packet of the remote terminal device can be relayed and forwarded on the radio link control (radio link control, RLC) bearer of the relay terminal device, wherein an RLC bearer can include a radio link control (radio link control, RLC) layer entity and a logical channel of the media access control (media access control, MAC) layer.
  • RLC radio link control
  • RLC radio link control
  • MAC media access control
  • an adaptation (adaptation, Adapt) layer can be added between the RLC layer and the packet data convergence protocol (PDCP) layer, so as to realize bearer multiplexing and demultiplexing. That is, data on at least one radio bearer supporting different remote terminal devices may be multiplexed onto one RLC bearer or data on one RLC bearer may be split into different radio bearers.
  • PDCP packet data convergence protocol
  • one RLC bearer corresponds to one PDCP entity or one radio bearer (radio bearer, RB), that is, multiplexing and demultiplexing of bearers are not supported. Therefore, when there is radio bearer (radio bearer, RB) multiplexing and demultiplexing, it may cause the problem that the downlink data of the remote terminal device cannot be correctly submitted. Therefore, in the scenario of RB multiplexing and demultiplexing, how to correctly submit downlink data has become a technical problem to be solved urgently at the current stage.
  • the present application provides a data transmission method and a related device, which realize the correct submission of downlink data.
  • a data transmission method is provided, the method is applied to a first terminal device, and the first terminal device uses a first radio link control RLC bearer when communicating with an access network device, and the first RLC bearer Used to transmit data corresponding to at least one terminal device from the access network device and/or the first RLC bearer is used to transmit data from the at least one terminal device, the method includes:
  • the first adaptation layer entity of the first terminal device submits the first data and first indication information to the second adaptation layer entity of the first terminal device, where the first indication information is used to instruct transmission of the A radio bearer corresponding to a second terminal device of the first data, where the second terminal device is a terminal device in the at least one terminal device;
  • the second adaptation layer entity of the first terminal device submits the first data to a second RLC bearer according to the first indication information, and the second RLC bearer is the connection between the first terminal device and the The RLC bearer used by the second terminal device for communication.
  • the first adaptation layer entity of the first terminal device submits the first data and the first indication information to the second adaptation layer entity of the first terminal device, so that the first adaptation layer entity of the first terminal device
  • the second adaptation layer entity can correctly deliver the first data to the second RLC bearer according to the first indication information, which improves the reliability of downlink data transmission.
  • the first indication information includes the identifier of the radio bearer and the identifier of the second terminal device; or,
  • the first indication information includes an identifier of the radio bearer and identifier information of a unicast connection on a sidelink, where the sidelink is a side link between the first terminal device and the second terminal device. Line link.
  • the first adaptation layer entity of the first terminal device submits the first indication information to the second adaptation layer entity of the first terminal device, so that the second adaptation layer entity of the first terminal device The entity can correctly submit the first data to the correct RLC bearer.
  • the second adaptation layer entity of the first terminal device submits the first data to the second RLC bearer according to the first indication information, including:
  • the second adaptation layer entity of the first terminal device submits the first data to the second RLC bearer according to the identifier of the radio bearer, the identifier of the second terminal device, and the first correspondence ;
  • the first correspondence includes a correspondence between the identifier of the radio bearer, the identifier of the second terminal device, and the identifier of the second RLC bearer.
  • the second adaptation layer entity of the first terminal device submits the first data to the second RLC bearer according to the identifier of the radio bearer, the identifier of the second terminal device, and the first correspondence, so that The second adaptation layer entity of the first terminal device can correctly submit data, which improves the reliability of downlink data transmission.
  • the method further includes:
  • the second adaptation layer entity of the first terminal device determines a sidelink according to the identifier of the second terminal device and the second corresponding relationship;
  • the sidelink is a link between the first terminal device and A sidelink between the second terminal devices, the sidelink corresponds to at least one RLC bearer;
  • the second correspondence includes identification information of a unicast connection on the sidelink and the a correspondence between identifiers of the second terminal device;
  • the second adaptation layer entity of the first terminal device submits the first data to the second RLC bearer according to the identifier of the radio bearer, the identifier of the second terminal device, and the first correspondence ,include:
  • the second adaptation layer entity of the first terminal device submits the first data to the at least one The second RLC bearer in the RLC bearer.
  • the second adaptation layer entity of the first terminal device needs to determine the sidelink according to the identity of the second terminal device and the second corresponding relationship, so that the data can be submitted to the corresponding sidelink; further, according to the wireless
  • the identifier of the bearer, the identifier of the second terminal device, and the first corresponding relationship submit the first data to the second RLC bearer in at least one RLC bearer, so that the second adaptation layer entity of the first terminal device can correctly submit the data, improving The reliability of downlink data transmission is improved.
  • the sidelink is a link between the first terminal device and the second terminal A sidelink between devices, where at least one RLC bearer is corresponding to the sidelink, and the second adaptation layer entity of the first terminal device uses the identifier of the radio bearer, the second terminal The device identifier and the first corresponding relationship submit the first data to the second RLC bearer, including:
  • the second adaptation layer entity of the first terminal device submits the first data to the at least one The second RLC bearer in the RLC bearer.
  • the first adaptation layer entity of the first terminal device submits the identification information of the radio bearer and the identification information of the unicast connection on the sidelink to the second adaptation layer of the first terminal device
  • the second adaptation layer entity of the first terminal device may submit data to the corresponding sidelink; further, according to the identity of the radio bearer, the identity of the second terminal device, and the first correspondence, the second The data is submitted to the second RLC bearer in the at least one RLC bearer, so that the second adaptation layer entity of the first terminal device can submit the data correctly, and the reliability of downlink data transmission is improved.
  • the first indication information further includes an identifier of the second terminal device.
  • the first adaptation layer entity of the first terminal device submits the identification information of the radio bearer and the identification information of the unicast connection on the sidelink to the second adaptation layer of the first terminal device
  • the first adaptation layer entity of the first terminal device may also submit the identity of the second terminal device to the second adaptation layer entity of the first terminal device, so that the second adaptation layer entity of the first terminal device Entities can submit data correctly, improving the reliability of downlink data transmission.
  • the method also includes:
  • the second adaptation layer entity of the first terminal device generates second data; the second data includes the first data and second indication information; the second indication information includes the radio bearer identifier , or, the second indication information includes the identifier of the radio bearer and the identifier of the second terminal device;
  • the second adaptation layer entity of the first terminal device submits the first data to the at least one
  • the second RLC bearer in the RLC bearer includes:
  • the second adaptation layer entity of the first terminal device submits the second data to the at least one The second RLC bearer in the RLC bearer.
  • the second adaptation layer entity of the first terminal device submits the second data to the second RLC bearer, so that the second adaptation layer entity of the first terminal device can submit the data correctly, which improves the Reliability of downlink data transmission.
  • the sidelink is a link between the first terminal device and the second terminal A sidelink link between devices, where the second adaptation layer entity of the first terminal device submits the first data to the second RLC bearer according to the first indication information, including:
  • the second adaptation layer entity of the first terminal device submits the first data to the radio bearer identifier, the identifier information of the unicast connection on the sidelink, and the third corresponding relationship.
  • the second RLC bearer
  • the third correspondence includes the correspondence between the identifier of the radio bearer, the identifier information of the unicast connection on the sidelink, and the identifier of the second RLC bearer.
  • the first adaptation layer entity of the first terminal device submits the identification information of the radio bearer and the identification information of the unicast connection on the sidelink to the second adaptation layer of the first terminal device
  • the second adaptation layer entity of the first terminal device may submit the data to the corresponding sidelink; further, according to the identity of the radio bearer, the identity information of the unicast connection on the sidelink, and the second The three-correspondence relationship submits the first data to the second RLC bearer, so that the second adaptation layer entity of the first terminal device can correctly submit the data, and improves the reliability of downlink data transmission.
  • the method also includes:
  • the second adaptation layer entity of the first terminal device generates third data; the third data includes the first data and second indication information; the second indication information includes the radio bearer identifier ;
  • the second adaptation layer entity of the first terminal device submits the first data to the radio bearer identifier, the identifier information of the unicast connection on the sidelink, and the third corresponding relationship.
  • the second RLC bearer includes:
  • the second adaptation layer entity of the first terminal device submits the third data to the radio bearer identifier, the identifier information of the unicast connection on the sidelink, and the third corresponding relationship.
  • the second RLC bearer receives the third data from the radio bearer identifier, the identifier information of the unicast connection on the sidelink, and the third corresponding relationship.
  • the second adaptation layer entity of the first terminal device submits the third data to the second RLC bearer, so that the second adaptation layer entity of the first terminal device can submit the data correctly, which improves the Reliability of downlink data transmission.
  • the method also includes:
  • the first adaptation layer entity of the first terminal device determines the identification information of the unicast connection on the sidelink according to the identification of the second terminal device and the second corresponding relationship;
  • the second correspondence includes a correspondence between the identification information of the unicast connection on the sidelink and the identification of the second terminal device.
  • the method also includes:
  • the first terminal device receives first configuration information from the access network device, where the first configuration information includes one or more of the following: a first correspondence, a second correspondence, a third correspondence, the first Configuration information is used to indicate one or more of the following:
  • the first correspondence is configuration information of the second adaptation layer of the first terminal device
  • the second correspondence is configuration information of the first adaptation layer of the first terminal device and/or the second adaptation layer of the first terminal device;
  • the third correspondence is configuration information of the second adaptation layer of the first terminal device
  • the first correspondence is a correspondence between the identifier of the radio bearer, the identifier of the second terminal device, and the identifier of the second RLC bearer
  • the second correspondence includes the A correspondence between the identification information of the unicast connection on the upper link and the identification of the second terminal device
  • the third correspondence includes the identification of the radio bearer, the identification information of the unicast connection on the sidelink, and A correspondence between identities carried by the second RLC.
  • the first terminal device receives the first configuration information from the access network device, so that the first terminal device can correctly submit data between different protocol layer entities according to the first configuration information, which improves data transmission. reliability.
  • a data transmission method is provided, the method is applied to a first terminal device, and the first terminal device uses a first radio link control RLC bearer when communicating with an access network device, and the first RLC bearer Used to transmit data corresponding to at least one terminal device from the access network device and/or the first RLC bearer is used to transmit data from the at least one terminal device, the method includes:
  • the first adaptation layer entity of the first terminal device submits the first data and first indication information to the second adaptation layer entity of the first terminal device, where the first indication information is used to instruct transmission of the A radio bearer corresponding to a second terminal device of the first data, where the second terminal device is a terminal device in the at least one terminal device;
  • the second adaptation layer entity of the first terminal device delivers the first data to the first RLC bearer according to the first indication information.
  • the first adaptation layer entity of the first terminal device submits the first data and the first indication information to the second adaptation layer entity of the first terminal device, so that the first adaptation layer entity of the first terminal device
  • the second adaptation layer entity can correctly deliver the first data to the first RLC bearer according to the first indication information, which improves the reliability of uplink data transmission.
  • the first indication information includes the identifier of the radio bearer and the identifier of the second terminal device; or,
  • the first indication information includes an identifier of the radio bearer and identifier information of a unicast connection on a sidelink, where the sidelink is a side link between the first terminal device and the second terminal device. Line link.
  • the first adaptation layer entity of the first terminal device submits the first indication information to the second adaptation layer entity of the first terminal device, so that the second adaptation layer entity of the first terminal device The entity can correctly submit the first data to the correct RLC bearer.
  • the method further includes:
  • the first adaptation layer entity of the first terminal device determines the identity of the second terminal device according to the identification information of the unicast connection on the sidelink and the first corresponding relationship;
  • the sidelink of the first data, the first correspondence is the correspondence between the identification information of the unicast connection on the sidelink and the identification of the second terminal device.
  • the sidelink is a link between the first terminal device and the second terminal A sidelink between devices, the method further comprising:
  • the second adaptation layer entity of the first terminal device determines the identity of the second terminal device according to the identification information of the unicast connection on the sidelink and the first correspondence;
  • the sidelink is A sidelink for transmitting the first data, where the first correspondence is a correspondence between identification information of a unicast connection on the sidelink and an identification of the second terminal device.
  • the second adaptation layer entity of the first terminal device submits the first data to the first RLC bearer according to the first indication information, including:
  • the second adaptation layer entity of the first terminal device submits the first data to the first RLC bearer according to the identifier of the radio bearer, the identifier of the second terminal device, and the second correspondence ;
  • the second correspondence includes a correspondence between the identifier of the radio bearer, the identifier of the second terminal device, and the identifier of the first RLC bearer.
  • the second adaptation layer entity of the first terminal device submits the first data to the first RLC bearer according to the identifier of the radio bearer, the identifier of the second terminal device, and the second corresponding relationship, so that The second adaptation layer entity of the first terminal device can correctly submit data, which improves the reliability of uplink data transmission.
  • the method also includes:
  • the second adaptation layer entity of the first terminal device generates second data;
  • the second data includes the first data and second indication information;
  • the second indication information includes the radio bearer identifier and an identifier of the second terminal device;
  • the second adaptation layer entity of the first terminal device submits the first data to the first RLC bearer according to the identifier of the radio bearer, the identifier of the second terminal device, and the second correspondence ,include:
  • the second adaptation layer entity of the first terminal device submits the second data to the first RLC bearer according to the identifier of the radio bearer, the identifier of the second terminal device, and the second correspondence .
  • the second adaptation layer entity of the first terminal device submits the second data to the first RLC bearer according to the identifier of the radio bearer, the identifier of the second terminal device, and the second corresponding relationship, so that the first RLC bearer
  • the second adaptation layer entity of a terminal device can submit data correctly, which improves the reliability of uplink data transmission.
  • the method also includes:
  • the first terminal device receives first configuration information from the access network device; the first configuration information includes one or more of the following: a first correspondence, a second correspondence; the first configuration information is used to indicate One or more of the following:
  • the first correspondence is configuration information of the first adaptation layer of the first terminal device and/or the second adaptation layer of the first terminal device;
  • the second correspondence is configuration information of the second adaptation layer of the first terminal device
  • the first correspondence is a correspondence between the identification information of the unicast connection on the sidelink and the identification of the second terminal device
  • the second correspondence includes the identification of the radio bearer, the The corresponding relationship between the identity of the second terminal device and the identity of the first RLC bearer.
  • the first terminal device receives the first configuration information from the access network device, so that the first terminal device can correctly submit data between different protocol layer entities according to the first configuration information, which improves data transmission. reliability.
  • a data transmission method is provided, the method is applied to a second terminal device, and the method includes:
  • the adaptation layer entity of the second terminal device receives second data from the radio link control RLC bearer of the second terminal device; the second data includes second indication information, and the second indication information is used to indicate the radio bearer corresponding to the second terminal device receiving the second data;
  • the adaptation layer entity of the second terminal device submits the second data to the packet data convergence protocol PDCP layer entity of the second terminal device according to the second indication information.
  • the adaptation layer entity of the second terminal device receives the second data from the RLC bearer of the second terminal device, so that the adaptation layer entity of the second terminal device can send the first The data is correctly submitted to the PDCP layer entity of the second terminal device, which improves the reliability of downlink data transmission.
  • the adaptation layer entity of the second terminal device submits the second data to the second terminal according to the second indication information
  • the PDCP layer entity of the device including:
  • the adaptation layer entity of the second terminal device submits the second data to the PDCP layer entity of the second terminal device according to the radio bearer identifier and the first correspondence;
  • the first correspondence includes a correspondence between the identifier of the radio bearer and the identifier of the PDCP layer entity of the second terminal device.
  • the adaptation layer entity of the second terminal device submits the second data to the PDCP layer entity of the second terminal device according to the identifier of the radio bearer and the first correspondence, so that the adaptation layer entity of the second terminal device
  • the distribution layer entity can correctly submit downlink data, which improves the reliability of downlink data transmission.
  • a data transmission method is provided, the method is applied to a second terminal device, and the method includes:
  • the adaptation layer entity of the second terminal device generates second data; the second data includes first data and second indication information, and the first data is obtained from the adaptation layer entity of the second terminal device.
  • the data received by the packet data convergence protocol PDCP layer entity of the second terminal device, the second indication information is used to indicate the radio bearer corresponding to the second terminal device receiving the second data;
  • the adaptation layer entity of the second terminal device submits the second data to the radio link control RLC bearer of the second terminal device according to the second indication information.
  • the adaptation layer entity of the second terminal device generates the second data, and the second data includes the first data and the second indication information, so that the adaptation layer entity of the second terminal device can generate the second data according to the second
  • the indication information correctly delivers the second data to the RLC bearer of the second terminal device, which improves the reliability of uplink data transmission.
  • the adaptation layer entity of the second terminal device submits the second data to the second terminal according to the second indication information
  • the RLC bearer of the device including:
  • the adaptation layer entity of the second terminal device submits the second data to the RLC bearer of the second terminal device according to the radio bearer identifier and the first correspondence;
  • the first correspondence includes a correspondence between the identifier of the radio bearer and the identifier of the RLC bearer of the second terminal device.
  • the adaptation layer entity of the second terminal device submits the second data to the RLC bearer of the second terminal device according to the identifier of the radio bearer and the first correspondence, so that the adaptation of the second terminal device
  • the layer entity can correctly submit uplink data, which improves the reliability of uplink data transmission.
  • the method also includes:
  • the second terminal device receives first configuration information from the access network device, where the first configuration information includes the following item: a first correspondence and a second correspondence, and the first configuration information is used to indicate that the first A correspondence or the second correspondence is configuration information of the adaptation layer of the second terminal device;
  • the first correspondence includes a correspondence between the identifier of the radio bearer and the identifier of the RLC bearer of the second terminal device;
  • the second correspondence includes a correspondence between the identifier of the radio bearer, the identifier of the second terminal device, and the identifier of the RLC bearer of the second terminal device.
  • the second terminal device receives the first configuration information from the access network device, so that the first terminal device can correctly submit data between different protocol layer entities according to the first configuration information, which improves data transmission. reliability.
  • a data transmission method is provided, the method is applied to an access network device, and the method includes:
  • the adaptation layer entity of the access network device generates second data; the second data includes first data and second indication information, and the first data is obtained from the adaptation layer entity of the access network device.
  • the data received by the packet data convergence protocol PDCP layer entity of the access network device, the second indication information is used to indicate the radio bearer corresponding to the second terminal device receiving the second data;
  • the adaptation layer entity of the access network device submits the second data to the radio link control RLC bearer of the access network device according to the second indication information.
  • the adaptation layer entity of the access network device generates the second data, and the second data includes the first data and the second indication information, so that the adaptation layer entity of the access network device can The indication information correctly submits the second data to the RLC bearer of the access network device, which improves the reliability of downlink data transmission.
  • the second indication information includes the identifier of the radio bearer and the identifier of the second terminal device, and the adaptation layer entity of the access network device converts the second terminal device according to the second indication information.
  • the data is submitted to the RLC bearer of the access network device, including:
  • the adaptation layer entity of the access network device submits the second data to the RLC bearer of the access network device according to the identifier of the radio bearer, the identifier of the second terminal device, and the first correspondence;
  • the first correspondence includes a correspondence between the identifier of the radio bearer, the identifier of the second terminal device, and the RLC bearer of the access network device.
  • the adaptation layer entity of the access network device submits the second data to the RLC bearer of the access network device according to the identifier of the radio bearer, the identifier of the second terminal device, and the first correspondence, so that The adaptation layer entity of the access network terminal device can correctly submit downlink data, which improves the reliability of downlink data transmission.
  • a data transmission method is provided, the method is applied to an access network device, and the method includes
  • the adaptation layer entity of the access network device receives second data from the radio link control RLC bearer of the access network device; the second data includes second indication information, and the second indication information is used to indicate a radio bearer corresponding to the second terminal device receiving the second data;
  • the adaptation layer entity of the access network device submits the second data to the packet data convergence protocol PDCP layer entity of the access network device according to the second indication information.
  • the adaptation layer entity of the access network device receives the second data from the RLC bearer of the access network device, so that the adaptation layer entity of the access network device can transmit the first data according to the second indication information.
  • the data is correctly submitted to the PDCP layer entity of the access network device, which improves the reliability of uplink data transmission.
  • the second indication information includes a radio bearer identifier and an identifier of the second terminal device
  • the adaptation layer entity of the access network device submits the second data to the second terminal device according to the second indication information.
  • the PDCP layer entities of the access network equipment include:
  • the adaptation layer entity of the access network device submits the second data to the PDCP layer entity of the access network device according to the identifier of the radio bearer, the identifier of the second terminal device, and the first correspondence ;
  • the first correspondence includes a correspondence between the identifier of the radio bearer, the identifier of the second terminal device, and the PDCP layer entity of the access network device.
  • the adaptation layer entity of the access network device submits the second data to the PDCP layer entity of the access network device according to the identifier of the radio bearer, the identifier of the second terminal device, and the first correspondence,
  • the adaptation layer entity of the access network device can correctly submit uplink data, and the reliability of uplink data transmission is improved.
  • a data transmission method is provided, the method is applied to a first terminal device, and the first terminal device uses a first radio link control RLC bearer when communicating with an access network device, and the first RLC bearer Used to transmit data corresponding to at least one terminal device from the access network device and/or the first RLC bearer is used to transmit data from the at least one terminal device, the method includes:
  • the first adaptation layer entity of the first terminal device submits the first data and the second indication information to the second adaptation layer entity of the first terminal device according to the first indication information;
  • the first indication information is used to indicate A second terminal device that transmits the first data, where the second indication information is used to indicate a radio bearer, and the second terminal device is a terminal device in the at least one terminal device;
  • the second adaptation layer entity of the first terminal device submits the first data to a second RLC bearer according to the second indication information;
  • the RLC bearer used for communication between the two terminal devices.
  • the first adaptation layer entity of the first terminal device submits the first data and the second indication information to the second adaptation layer entity of the first terminal device according to the first indication information, so that the second adaptation layer entity of the first terminal device
  • the second adaptation layer entity of a terminal device can correctly deliver the first data to the second RLC bearer according to the second indication information, which improves the reliability of uplink data transmission.
  • the first indication information is an identifier of the second terminal device
  • the first adaptation layer entity of the first terminal device submits the first data and the second indication information to the second terminal device according to the first indication information.
  • the second adaptation layer entity of the first terminal device includes:
  • the first adaptation layer entity of the first terminal device determines the second adaptation layer entity of the first terminal device from multiple adaptation layer entities according to the identifier of the second terminal device and the first corresponding relationship ;
  • the first adaptation layer entity of the first terminal device submits the first data and the second indication information to the second adaptation layer entity of the first terminal device;
  • the first correspondence includes one or more of the following:
  • the second adaptation layer entity of the first terminal device corresponds to the sidelink, or, the second adaptation layer entity of the first terminal device corresponds to the second terminal device.
  • the first adaptation layer entity of the first terminal device determines the second adaptation layer entity of the first terminal device from multiple adaptation layer entities according to the identifier of the second terminal device and the first corresponding relationship.
  • the matching layer entity so that the first adaptation layer entity of the first terminal device can submit the first data and the second indication information to the second adaptation layer entity of the first terminal device, so that the first adaptation layer entity of the first terminal device can
  • the adaptation layer entity correctly submits downlink data.
  • the second indication information includes an identifier of a radio bearer
  • the second adaptation layer entity of the first terminal device submits the first data to a second RLC bearer according to the second indication information, including :
  • the second adaptation layer entity of the first terminal device submits the first data to the second RLC bearer according to the radio bearer identifier and a second correspondence; the second correspondence includes the radio bearer A corresponding relationship between the identifier of the bearer, the identifier of the second terminal device, and the identifier of the second RLC bearer.
  • the second adaptation layer entity of the first terminal device submits the first data to the second RLC bearer according to the identifier of the radio bearer and the second corresponding relationship, so that the first terminal device's first The second adaptation layer entity correctly submits downlink data, which improves the reliability of downlink data transmission.
  • the second indication information further includes an identifier of the second terminal device, and the second adaptation layer entity of the first terminal device assigns the second terminal device to the A data is submitted to the second RLC bearer, including:
  • the second adaptation layer entity of the first terminal device submits the first data to the second RLC bearer according to the identifier of the radio bearer, the identifier of the second terminal device, and the second correspondence .
  • the second adaptation layer entity of the first terminal device submits the first data to the second RLC bearer according to the identifier of the radio bearer, the identifier of the second terminal device, and the second correspondence, so that the This enables the second adaptation layer entity of the first terminal device to correctly submit downlink data, thereby improving the reliability of downlink data transmission.
  • the method also includes:
  • the second adaptation layer entity of the first terminal device generates second data; the second data includes the first data and third indication information; the third indication information includes the radio bearer identifier, or , the third indication information includes an identifier of the radio bearer and an identifier of the second terminal device;
  • the second adaptation layer entity of the first terminal device submits the first data to the second RLC bearer according to the identifier of the radio bearer, the identifier of the second terminal device, and the second correspondence ,include:
  • the second adaptation layer entity of the first terminal device submits the second data to the second RLC bearer according to the identifier of the radio bearer, the identifier of the second terminal device, and the second correspondence .
  • the second adaptation layer entity of the first terminal device submits the second data to the second RLC bearer according to the identifier of the radio bearer, the identifier of the second terminal device, and the second correspondence, so that the This enables the second adaptation layer entity of the first terminal device to correctly submit downlink data, thereby improving the reliability of downlink data transmission.
  • the method also includes:
  • the first terminal device receives first configuration information from the access network device; the first configuration information includes one or more of the following: a first correspondence, a second correspondence;
  • the first configuration information is used to indicate one or more of the following:
  • the first correspondence is configuration information of the first adaptation layer of the first terminal device
  • the second correspondence is configuration information of the second adaptation layer of the first terminal device
  • the first correspondence includes one or more of the following:
  • the sidelink corresponds to the second adaptation layer entity
  • the second correspondence includes a correspondence between the identifier of the radio bearer, the identifier of the second terminal device, and the identifier of the second RLC bearer.
  • the first terminal device receives the first configuration information from the access network device, so that the first terminal device can correctly submit data between different protocol layer entities according to the first configuration information, which improves data transmission. reliability.
  • a data transmission method is provided, the method is applied to a first terminal device, and the first terminal device uses a first radio link control RLC bearer when communicating with an access network device, and the first RLC bearer Used to transmit data corresponding to at least one terminal device from the access network device and/or the first RLC bearer is used to transmit data from the at least one terminal device, the method includes:
  • the first adaptation layer entity of the first terminal device submits the first data and first indication information to the second adaptation layer entity of the first terminal device; the first indication information is used to indicate a radio bearer,
  • the second terminal device is a terminal device in the at least one terminal device;
  • the second adaptation layer entity of the first terminal device submits the first data to the first RLC bearer according to the first indication information.
  • the first adaptation layer entity of the first terminal device submits the first data and the first indication information to the second adaptation layer entity of the first terminal device, so that the first adaptation layer entity of the first terminal device
  • the second adaptation layer entity can correctly deliver the first data to the first RLC bearer according to the first indication information, which improves the reliability of uplink data transmission.
  • the method also includes:
  • the first adaptation layer entity of the first terminal device determines the identifier of the second terminal device according to the second indication information and the second corresponding relationship;
  • the first adaptation layer entity of the first terminal device submits the identifier of the second terminal device to the second adaptation layer entity of the first terminal device;
  • the second indication information includes one or more of the following: the identity of the first adaptation layer entity, the identity information of the unicast connection on the sidelink, and the sidelink is the a sidelink between a terminal device and said second terminal device;
  • the second correspondence includes one or more of the following:
  • the first adaptation layer entity of the first terminal device when the first adaptation layer entity of the first terminal device does not obtain the identity of the second terminal device, the first adaptation layer entity of the first terminal device according to the second indication information and The second correspondence relationship is to determine the identifier of the second terminal device, thereby realizing the conversion of the second indication information and the identifier of the second terminal device.
  • the method also includes:
  • the second adaptation layer entity of the first terminal device determines the identifier of the second terminal device according to the third indication information and the third corresponding relationship;
  • the third indication information includes one or more of the following: the identity of the second adaptation layer entity, the identity information of the unicast connection on the sidelink, and the sidelink is the a sidelink between the terminal device and the second terminal device, where the sidelink corresponds to the first adaptation layer entity;
  • the third corresponding relationship includes one or more of the following:
  • the first terminal device when the first adaptation layer entity of the first terminal device does not submit the identity of the second terminal device to the second adaptation layer entity of the first terminal device, the first terminal device The second adaptation layer entity determines the identity of the second terminal device according to the second indication information and the third corresponding relationship, thereby implementing conversion between the second indication information and the identity of the second terminal device.
  • the first indication information includes an identifier of the radio bearer
  • the second adaptation layer entity of the first terminal device submits the first data to the first RLC bearer according to the first indication information
  • the second adaptation layer entity of the first terminal device submits the first data to the first RLC bearer according to the identifier of the radio bearer, the identifier of the second terminal device, and the first correspondence;
  • the first correspondence includes a correspondence between the identifier of the radio bearer, the identifier of the second terminal device, and the identifier of the first RLC bearer.
  • the second adaptation layer entity of the first terminal device submits the first data to the first RLC bearer according to the identifier of the radio bearer, the identifier of the second terminal device, and the first correspondence, so that The second adaptation layer entity of the first terminal device can correctly submit data, which improves the reliability of uplink data transmission.
  • the method also includes:
  • the second adaptation layer entity of the first terminal device generates second data; the second data includes the first data, the radio bearer identifier, and the second terminal device identifier, or, the The second data includes the first data and the identifier of the radio bearer;
  • the second adaptation layer entity of the first terminal device submits the first data to the first RLC bearer according to the identifier of the radio bearer, the identifier of the second terminal device, and the first correspondence, including :
  • the second adaptation layer entity of the first terminal device submits the second data to the first RLC bearer according to the identifier of the radio bearer, the identifier of the second terminal device, and the first correspondence.
  • the second adaptation layer entity of the first terminal device submits the second data to the first RLC bearer according to the identifier of the radio bearer, the identifier of the second terminal device, and the first correspondence, so that the first RLC bearer
  • the second adaptation layer entity of a terminal device can submit data correctly, which improves the reliability of uplink data transmission.
  • the method also includes:
  • the first terminal device receives second configuration information from the access network device;
  • the second configuration information includes one or more of the following: a first correspondence, a second correspondence, and a third correspondence;
  • the second configuration information is used to indicate one or more of the following:
  • the first correspondence is configuration information of the second adaptation layer of the first terminal device
  • the second correspondence is configuration information of the first adaptation layer of the first terminal device
  • the third correspondence is configuration information of the second adaptation layer of the first terminal device
  • the first correspondence includes a correspondence between the identifier of the radio bearer, the identifier of the second terminal device, and the identifier of the first RLC bearer;
  • the second correspondence includes one or more of the following:
  • the third corresponding relationship includes one or more of the following:
  • the first terminal device receives the second configuration information from the access network device, so that the first terminal device can correctly submit data between different protocol layer entities according to the second configuration information, which improves data transmission. reliability.
  • a ninth aspect provides a communication device, the communication device is a first terminal device, and the first terminal device uses a first radio link control RLC bearer when communicating with an access network device, and the first RLC bearer uses For transmitting data corresponding to at least one terminal device from the access network device and/or the first RLC bearer is used for transmitting data from the at least one terminal device, the first terminal device includes a transceiver module,
  • the transceiving module is configured to deliver the first data and the first indication information to the second adaptation layer entity of the first terminal device through the first adaptation layer entity of the first terminal device, the first The indication information is used to indicate a radio bearer corresponding to the second terminal device transmitting the first data, where the second terminal device is a terminal device in the at least one terminal device;
  • the transceiver module is configured to deliver the first data to a second RLC bearer according to the first instruction information through the second adaptation layer entity of the first terminal device, and the second RLC bearer is An RLC bearer used when the first terminal device communicates with the second terminal device.
  • the first indication information includes the identifier of the radio bearer and the identifier of the second terminal device; or,
  • the first indication information includes an identifier of the radio bearer and identifier information of a unicast connection on a sidelink, where the sidelink is a side link between the first terminal device and the second terminal device. Line link.
  • the transceiver module is configured to pass the The second adaptation layer entity of the first terminal device submits the first data to the second RLC bearer according to the identifier of the radio bearer, the identifier of the second terminal device, and the first correspondence;
  • the first correspondence includes a correspondence between the identifier of the radio bearer, the identifier of the second terminal device, and the identifier of the second RLC bearer.
  • the first terminal device further includes a processing module, the processing module is configured to The second adaptation layer entity of a terminal device determines a sidelink according to the identifier of the second terminal device and the first correspondence; the sidelink is a connection between the first terminal device and the second terminal device.
  • a sidelink between two terminal devices, the sidelink corresponds to at least one RLC bearer; the first correspondence includes identification information of a unicast connection on the sidelink and the second terminal Correspondence between device identifiers;
  • the second adaptation layer entity of the first terminal device submits the first data to the second RLC according to the identifier of the radio bearer, the identifier of the second terminal device, and the first corresponding relationship
  • the processing module is configured to, through the second adaptation layer entity of the first terminal device, according to the identifier of the radio bearer, the identifier of the second terminal device and the first correspondence
  • the first data is delivered to the second RLC bearer in the at least one RLC bearer.
  • the sidelink is a link between the first terminal device and the second terminal A sidelink between devices, where at least one RLC bearer is corresponding to the sidelink, and the second adaptation layer entity of the first terminal device according to the radio bearer identifier
  • the transceiver module is configured to use the second adaptation layer entity of the first terminal device according to the submitting the first data to the second RLC bearer in the at least one RLC bearer according to the identifier of the radio bearer, the identifier of the second terminal device, and the first correspondence.
  • the first indication information further includes an identifier of the second terminal device.
  • the first terminal device further includes a processing module, configured to generate second data through the second adaptation layer entity of the first terminal device;
  • the second data includes the The first data and the second indication information;
  • the second indication information includes the identifier of the radio bearer, or, the second indication information includes the identifier of the radio bearer and the identifier of the second terminal device;
  • the second adaptation layer entity of the first terminal device submits the first data to the at least
  • the transceiver module is configured to use the second adaptation layer entity of the first terminal device according to the identity of the radio bearer, the second terminal device and the first corresponding relationship, submit the second data to the second RLC bearer in the at least one RLC bearer.
  • the sidelink is a link between the first terminal device and the second terminal A sidelink link between devices, when the second adaptation layer entity of the first terminal device submits the first data to the second RLC bearer according to the first indication information, the a transceiver module, configured to use the second adaptation layer entity of the first terminal device to transmit the submitting the first data to the second RLC bearer;
  • the third correspondence includes the correspondence between the identifier of the radio bearer, the identifier information of the unicast connection on the sidelink, and the identifier of the second RLC bearer.
  • the first terminal device further includes a processing module, configured to generate third data through the second adaptation layer entity of the first terminal device; the third data includes the The first data and the second indication information; the second indication information includes the identification of the radio bearer;
  • the second adaptation layer entity of the first terminal device submits the first data to the radio bearer identifier, the identifier information of the unicast connection on the sidelink, and the third corresponding relationship.
  • the second RLC bearer includes:
  • the second adaptation layer entity of the first terminal device submits the third data to the radio bearer identifier, the identifier information of the unicast connection on the sidelink, and the third corresponding relationship.
  • the second RLC bearer receives the third data from the radio bearer identifier, the identifier information of the unicast connection on the sidelink, and the third corresponding relationship.
  • the first terminal device further includes a processing module, and the processing module is further configured to use the first adaptation layer entity of the first terminal device according to the identifier of the second terminal device and the second corresponding relationship, determining the identification information of the unicast connection on the sidelink;
  • the second correspondence includes a correspondence between the identification information of the unicast connection on the sidelink and the identification of the second terminal device.
  • the transceiver module is further configured to receive first configuration information from the access network device, where the first configuration information includes one or more of the following: first correspondence, second correspondence, third correspondence relationship, the first configuration information is used to indicate one or more of the following:
  • the first correspondence is configuration information of the second adaptation layer of the first terminal device
  • the second correspondence is configuration information of the first adaptation layer of the first terminal device and/or the second adaptation layer of the first terminal device;
  • the third correspondence is configuration information of the second adaptation layer of the first terminal device
  • the first correspondence is a correspondence between the identifier of the radio bearer, the identifier of the second terminal device, and the identifier of the second RLC bearer
  • the second correspondence includes the A correspondence between the identification information of the unicast connection on the upper link and the identification of the second terminal device
  • the third correspondence includes the identification of the radio bearer, the identification information of the unicast connection on the sidelink, and A correspondence between identities carried by the second RLC.
  • a communication device is provided, the communication device is a first terminal device, and the first terminal device uses a first radio link control RLC bearer when communicating with an access network device, and the first RLC bearer uses For transmitting data corresponding to at least one terminal device from the access network device and/or the first RLC bearer is used for transmitting data from the at least one terminal device, the first terminal device includes a transceiver module,
  • the transceiving module is configured to deliver the first data and the first indication information to the second adaptation layer entity of the first terminal device through the first adaptation layer entity of the first terminal device, the first The indication information is used to indicate a radio bearer corresponding to the second terminal device transmitting the first data, where the second terminal device is a terminal device in the at least one terminal device;
  • the transceiving module is configured to deliver the first data to the first RLC bearer according to the first indication information through the second adaptation layer entity of the first terminal device.
  • the first indication information includes the identifier of the radio bearer and the identifier of the second terminal device; or,
  • the first indication information includes an identifier of the radio bearer and identifier information of a unicast connection on a sidelink, where the sidelink is a side link between the first terminal device and the second terminal device. Line link.
  • the first terminal device further includes a processing module, the processing module is configured to The first adaptation layer entity of a terminal device determines the identity of the second terminal device according to the identification information of the unicast connection on the sidelink and the first corresponding relationship; the sidelink is used to transmit the first For a sidelink of data, the first correspondence is a correspondence between the identification information of the unicast connection on the sidelink and the identification of the second terminal device.
  • the sidelink is a link between the first terminal device and the second terminal A sidelink between devices
  • the first terminal device further includes a processing module, and the processing module is configured to use the second adaptation layer entity of the first terminal device according to the single link on the sidelink broadcast connection identification information and the first correspondence to determine the identification of the second terminal device;
  • the sidelink is the sidelink for transmitting the first data, and the first correspondence is the sidelink The corresponding relationship between the identification information of the unicast connection on the uplink and the identification of the second terminal device.
  • the transceiver module is configured to pass the The second adaptation layer entity of the first terminal device submits the first data to the first RLC bearer according to the identifier of the radio bearer, the identifier of the second terminal device, and the second correspondence;
  • the second correspondence includes a correspondence between the identifier of the radio bearer, the identifier of the second terminal device, and the identifier of the first RLC bearer.
  • the processing module is further configured to generate second data through the second adaptation layer entity of the first terminal device;
  • the second data includes the first data and second indication information;
  • the second indication information includes an identifier of the radio bearer and an identifier of the second terminal device;
  • the second adaptation layer entity of the first terminal device submits the first data to the first RLC according to the identifier of the radio bearer, the identifier of the second terminal device, and the second corresponding relationship
  • the transceiver module is configured to use the second adaptation layer entity of the first terminal device to transmit the The second data is delivered to the first RLC bearer.
  • the transceiver module is further configured to receive first configuration information from an access network device; the first configuration information includes one or more of the following: a first correspondence, a second correspondence; the first A configuration message is used to indicate one or more of the following:
  • the first correspondence is configuration information of the first adaptation layer of the first terminal device and/or the second adaptation layer of the first terminal device;
  • the second correspondence is configuration information of the second adaptation layer of the first terminal device
  • the first correspondence is a correspondence between the identification information of the unicast connection on the sidelink and the identification of the second terminal device
  • the second correspondence includes the identification of the radio bearer, the The corresponding relationship between the identity of the second terminal device and the identity of the first RLC bearer.
  • a communication device is provided, the communication device is a second terminal device, and the second terminal device includes a transceiver module,
  • the transceiver module is configured to receive second data from the radio link control RLC bearer of the second terminal device through the adaptation layer entity of the second terminal device; the second data includes second indication information, and The second indication information is used to indicate the radio bearer corresponding to the second terminal device receiving the second data;
  • the transceiving module is configured to deliver the second data to the Packet Data Convergence Protocol (PDCP) layer entity of the second terminal device through the adaptation layer entity of the second terminal device according to the second indication information.
  • PDCP Packet Data Convergence Protocol
  • the adaptation layer entity of the second terminal device submits the second data to the second
  • the transceiving module is configured to submit the second data to the second data according to the identifier of the radio bearer and the first corresponding relationship through the adaptation layer entity of the second terminal device 2.
  • the first correspondence includes a correspondence between the identifier of the radio bearer and the identifier of the PDCP layer entity of the second terminal device.
  • a communication device is provided, the communication device is a second terminal device, and the second terminal device includes a transceiver module and a processing module,
  • the processing module is configured to generate second data through an adaptation layer entity of the second terminal device; the second data includes first data and second indication information, and the first data is the second terminal.
  • the transceiving module is configured to deliver the second data to the radio link control RLC bearer of the second terminal device through the adaptation layer entity of the second terminal device according to the second indication information.
  • the adaptation layer entity of the second terminal device submits the second data to the second
  • the transceiver module is configured to, through the adaptation layer entity of the second terminal device, deliver the second data to the second RLC bearer of the terminal equipment;
  • the first correspondence includes a correspondence between the identifier of the radio bearer and the identifier of the RLC bearer of the second terminal device.
  • the transceiver module is further configured to receive first configuration information from an access network device, where the first configuration information includes the following items: a first correspondence, a second correspondence, and the first configuration information used to indicate that the first correspondence or the second correspondence is configuration information of an adaptation layer of the second terminal device;
  • the first correspondence includes a correspondence between the identifier of the radio bearer and the identifier of the RLC bearer of the second terminal device;
  • the second correspondence includes a correspondence between the identifier of the radio bearer, the identifier of the second terminal device, and the identifier of the RLC bearer of the second terminal device.
  • a communication device is provided, the communication device is an access network device, and the access network device includes a transceiver module and a processing module,
  • the processing module is configured to generate second data through an adaptation layer entity of the access network device;
  • the second data includes first data and second indication information, and the first data is the The data received by the adaptation layer entity of the device from the packet data convergence protocol PDCP layer entity of the access network device, the second indication information is used to indicate the radio bearer corresponding to the second terminal device receiving the second data;
  • the transceiving module is configured to deliver the second data to the radio link control RLC bearer of the access network device according to the second indication information through the adaptation layer entity of the access network device, the The RLC bearer of the access network device is the RLC bearer used when the access network device communicates with the first terminal device.
  • the second indication information includes the identifier of the radio bearer and the identifier of the second terminal device, and the adaptation layer entity of the access network device transfers the second terminal device according to the second indication information.
  • the transceiver module is configured to use the adaptation layer entity of the access network device according to the identifier of the radio bearer and the identifier of the second terminal device Submitting the second data to the RLC bearer of the access network device corresponding to the first relationship;
  • the first correspondence includes a correspondence between the identifier of the radio bearer, the identifier of the second terminal device, and the RLC bearer of the access network device.
  • a communication device where the communication device is an access network device, and the access network device includes a transceiver module,
  • the transceiver module is configured to receive second data from the radio link control RLC bearer of the access network device through the adaptation layer entity of the access network device; the RLC bearer of the access network device is the The RLC bearer used when the access network device communicates with the first terminal device, the second data includes second indication information, and the second indication information is used to indicate the radio station corresponding to the second terminal device receiving the second data. carrying;
  • the transceiving module is configured to deliver the second data to the Packet Data Convergence Protocol (PDCP) layer entity of the access network device through the adaptation layer entity of the access network device according to the second indication information.
  • PDCP Packet Data Convergence Protocol
  • the second indication information includes the identifier of the radio bearer and the identifier of the second terminal device
  • the adaptation layer entity of the access network device submits the second data to the
  • the transceiver module is configured to use the adaptation layer entity of the access network device according to the identifier of the radio bearer, the identifier of the second terminal device, and the first Submitting the second data to the PDCP layer entity of the access network device in the corresponding relationship;
  • the first correspondence includes a correspondence between the identifier of the radio bearer, the identifier of the second terminal device, and the PDCP layer entity of the access network device.
  • a fifteenth aspect provides a communication device, the communication device is a first terminal device, and the first terminal device uses a first radio link control RLC bearer when communicating with an access network device, and the first RLC bearer Used to transmit data corresponding to at least one terminal device from the access network device and/or the first RLC bearer is used to transmit data from the at least one terminal device, the first terminal device includes a transceiver module,
  • the transceiving module is configured to deliver the first data and the second indication information to the second adaptation layer entity of the first terminal device through the first adaptation layer entity of the first terminal device according to the first indication information;
  • the first indication information is used to indicate a second terminal device that transmits the first data
  • the second indication information is used to indicate a radio bearer
  • the second terminal device is a terminal device in the at least one terminal device;
  • the transceiver module is configured to deliver the first data to a second RLC bearer according to the second indication information through the second adaptation layer entity of the first terminal device; the second RLC bearer is the An RLC bearer used when the first terminal device communicates with the second terminal device.
  • the first terminal device further includes a processing module
  • the first indication information is an identifier of the second terminal device
  • the first adaptation layer entity of the first terminal device according to the first indication information
  • the processing module is configured to use the first adaptation layer entity of the first terminal device according to the determining a second adaptation layer entity of the first terminal device from among multiple adaptation layer entities based on the identifier of the second terminal device and the first correspondence;
  • the transceiving module is further configured to submit the first data and the second indication information to the second adaptation layer entity of the first terminal device through the first adaptation layer entity of the first terminal device;
  • the first correspondence includes one or more of the following:
  • the second adaptation layer entity of the first terminal device corresponds to the sidelink, or, the second adaptation layer entity of the first terminal device corresponds to the second terminal device.
  • the second indication information includes an identifier of a radio bearer
  • the transceiver module configured to deliver the first data to the second RLC bearer according to the identifier of the radio bearer and the second corresponding relationship through the second adaptation layer entity of the first terminal device;
  • the second corresponding relationship includes a corresponding relationship between the identifier of the radio bearer, the identifier of the second terminal device, and the identifier of the second RLC bearer.
  • the second indication information further includes the identifier of the second terminal device, and the second adaptation layer entity of the first terminal device transfers the
  • the transceiver module is configured to use the second adaptation layer entity of the first terminal device according to the identity of the radio bearer and the identity of the second terminal equipment and submitting the first data to the second RLC bearer according to the second corresponding relationship.
  • the first terminal device further includes a processing module, configured to generate second data through a second adaptation layer entity of the first terminal device; the second data includes the first Data and third indication information; the third indication information includes the identifier of the radio bearer, or, the third indication information includes the identifier of the radio bearer and the identifier of the second terminal device;
  • the second adaptation layer entity of the first terminal device submits the first data to the second RLC according to the identifier of the radio bearer, the identifier of the second terminal device, and the second corresponding relationship
  • the transceiver module is configured to use the second adaptation layer entity of the first terminal device to transfer the The second data is delivered to the second RLC bearer.
  • the transceiver module is further configured to receive first configuration information from an access network device; the first configuration information includes one or more of the following: first correspondence, second correspondence;
  • the first configuration information is used to indicate one or more of the following:
  • the first correspondence is configuration information of the first adaptation layer of the first terminal device
  • the second correspondence is configuration information of the second adaptation layer of the first terminal device
  • the first correspondence includes one or more of the following:
  • the sidelink corresponds to the second adaptation layer entity
  • the second correspondence includes a correspondence between the identifier of the radio bearer, the identifier of the second terminal device, and the identifier of the second RLC bearer.
  • a sixteenth aspect provides a communication device, the communication device is a first terminal device, and the first terminal device uses a first radio link control RLC bearer when communicating with an access network device, and the first RLC bearer Used to transmit data corresponding to at least one terminal device from the access network device and/or the first RLC bearer is used to transmit data from the at least one terminal device, the first terminal device includes a transceiver module, The transceiver module is configured to deliver the first data and the first indication information to the second adaptation layer entity of the first terminal device through the first adaptation layer entity of the first terminal device; the first The indication information is used to indicate a radio bearer, and the second terminal device is a terminal device in the at least one terminal device; the second adaptation layer entity of the first terminal device assigns the first indication information to the A piece of data is delivered to the first RLC bearer.
  • the first terminal device further includes a processing module, configured to use the first adaptation layer entity of the first terminal device to determine the identification of the second terminal device;
  • the transceiving module is configured to submit the identity of the second terminal device to the second adaptation layer entity of the first terminal device through the first adaptation layer entity of the first terminal device;
  • the second indication information includes one or more of the following: the identity of the first adaptation layer entity, the identity information of the unicast connection on the sidelink, and the sidelink is the a sidelink between a terminal device and said second terminal device;
  • the second correspondence includes one or more of the following:
  • the first terminal device further includes a processing module, configured to use the second adaptation layer entity of the first terminal device to determine the identification of the second terminal device;
  • the third indication information includes one or more of the following: the identity of the second adaptation layer entity, the identity information of the unicast connection on the sidelink, and the sidelink is the a sidelink between the terminal device and the second terminal device, where the sidelink corresponds to the first adaptation layer entity;
  • the third corresponding relationship includes one or more of the following:
  • the first indication information includes the identifier of the radio bearer
  • the second adaptation layer entity of the first terminal device submits the first data to the first RLC according to the first indication information
  • the transceiver module is configured to use the second adaptation layer entity of the first terminal device to transfer the first submitting data to the first RLC bearer;
  • the first correspondence includes a correspondence between the identifier of the radio bearer, the identifier of the second terminal device, and the identifier of the first RLC bearer.
  • the processing module is further configured to generate second data through a second adaptation layer entity of the first terminal device; the second data includes the first data, the radio bearer identifier, and The identifier of the second terminal device, or, the second data includes the first data and the identifier of the radio bearer;
  • the transceiver module configured to deliver the second data through the second adaptation layer entity of the first terminal device according to the identifier of the radio bearer, the identifier of the second terminal device, and the first correspondence Bearer for the first RLC.
  • the transceiver module is configured to receive second configuration information from an access network device;
  • the second configuration information includes one or more of the following: first correspondence, second correspondence, third correspondence ;
  • the second configuration information is used to indicate one or more of the following:
  • the first correspondence is configuration information of the second adaptation layer of the first terminal device
  • the second correspondence is configuration information of the first adaptation layer of the first terminal device
  • the third correspondence is configuration information of the second adaptation layer of the first terminal device
  • the first correspondence includes a correspondence between the identifier of the radio bearer, the identifier of the second terminal device, and the identifier of the first RLC bearer;
  • the second correspondence includes one or more of the following:
  • the third corresponding relationship includes one or more of the following:
  • a communication device including a processor and a memory, and the processor invokes a computer program stored in the memory to implement the first aspect, the second aspect, the third aspect, the fourth aspect, and the fifth aspect. Aspect, the method described in any one of the sixth aspect, the seventh aspect or the eighth aspect.
  • the communication device may be a chip implementing the method in the first aspect, the second aspect, the third aspect, the fourth aspect, the fifth aspect, the sixth aspect, the seventh aspect or the eighth aspect or A device that contains a chip.
  • a computer-readable storage medium is provided.
  • a computer program is stored in the computer-readable storage medium.
  • the computer program is executed, the first aspect, the second aspect, the third aspect, and The method described in any one of the fourth aspect, the fifth aspect, the sixth aspect, the seventh aspect or the eighth aspect.
  • a computer program product containing instructions, when it is executed on a computer, the first aspect, the second aspect, the third aspect, the fourth aspect, the fifth aspect, the sixth aspect, the seventh aspect Aspect or the method of any one of the eighth aspect is performed.
  • a communication system includes one or more of the following: the above-mentioned first terminal device, the above-mentioned second terminal device, and the above-mentioned access network device.
  • FIG. 1 is a control plane protocol stack involved in communication between a terminal device and a terminal device;
  • Figure 2 shows the data plane protocol architecture of U2N Relay
  • Fig. 3 is the infrastructure of the communication system provided by the embodiment of the present application.
  • FIG. 4 is a schematic diagram of a hardware structure applicable to a communication device provided by an embodiment of the present application.
  • FIG. 5A is a schematic flowchart of a data transmission method provided by an embodiment of the present application.
  • FIG. 5B is a schematic flowchart of another data transmission method provided by the embodiment of the present application.
  • FIG. 6A is a schematic flowchart of another data transmission method provided by the embodiment of the present application.
  • FIG. 6B is a schematic flowchart of another data transmission method provided by the embodiment of the present application.
  • FIG. 7A is a schematic flowchart of another data transmission method provided by the embodiment of the present application.
  • FIG. 7B is a schematic flowchart of another data transmission method provided by the embodiment of the present application.
  • FIG. 8A is a schematic flowchart of another data transmission method provided by the embodiment of the present application.
  • FIG. 8B is a schematic flowchart of another data transmission method provided by the embodiment of the present application.
  • FIG. 9 is a schematic flowchart of another data transmission method provided by the embodiment of the present application.
  • FIG. 10 is a schematic flowchart of another data transmission method provided in the embodiment of the present application.
  • FIG. 11 is a schematic flowchart of another data transmission method provided by the embodiment of the present application.
  • FIG. 12 is a schematic flowchart of another data transmission method provided by the embodiment of the present application.
  • 13A is a schematic diagram of transmitting downlink data from an access network device to a second terminal device through a first terminal device and transmitting uplink data from a second terminal device to an access network device through a first terminal device;
  • 13B is a schematic diagram of transmitting downlink data from the access network device to the second terminal device through the first terminal device and transmitting uplink data from the second terminal device to the access network device through the first terminal device;
  • FIG. 14 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 15 is a schematic structural diagram of a simplified terminal device provided by an embodiment of the present application.
  • FIG. 16 is a schematic structural diagram of a simplified access network device provided by an embodiment of the present application.
  • At least one of the following or similar expressions refer to any combination of these items, including any combination of single or plural items.
  • at least one item (piece) of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be one or more .
  • words such as “first” and “second” are used to distinguish network elements from identical or similar items with basically the same functions . Those skilled in the art can understand that words such as “first” and “second” do not limit the number and execution order, and words such as “first” and “second” do not necessarily limit the difference.
  • references to "one embodiment” or “some embodiments” and the like described in the embodiments of the present application mean that specific features, structures or characteristics described in connection with the embodiments are included in one or more embodiments of the present application.
  • appearances of the phrases “in one embodiment,” “in some embodiments,” “in other embodiments,” “in other embodiments,” etc. in various places in this specification are not necessarily All refer to the same embodiment, but mean “one or more but not all embodiments” unless specifically stated otherwise.
  • the terms “including”, “comprising”, “having” and variations thereof mean “including but not limited to”, unless specifically stated otherwise.
  • SL means: defined for direct communication between terminal equipment and terminal equipment. That is, the link between the terminal equipment and the terminal equipment directly communicates without forwarding by the base station.
  • the interface between the terminal equipment and the terminal equipment is called a PC5 interface, and the PC5 interface is similar to the Uu interface between the terminal equipment and the access network equipment.
  • the control plane protocol stack involved in the communication between the terminal device and the terminal device can refer to FIG. 1.
  • the control plane there can be peer-to-peer radio resource control (radio resource control, RRC) layer, packet data convergence protocol (packet data convergence protocol, PDCP) layer, radio link control (radio link control, RLC) layer, media access control (media access control, MAC) layer, physical (physical, PHY) layer, etc.
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • RLC radio link control
  • media access control media access control
  • MAC physical (physical, PHY) layer
  • the communication types supported on the SL may include broadcast communication, multicast communication and unicast communication.
  • broadcast communication is supported on the SL.
  • NR new air interface
  • Broadcast communication is similar to access network equipment broadcasting system information, that is, terminal equipment does not encrypt and send broadcast service data to the outside world, any other terminal equipment within the effective receiving range, if interested in the broadcast service, can receive the broadcast service data .
  • Multicast communication refers to communication between all terminals in a communication group, and any terminal device in the group can send and receive data of the multicast service.
  • Unicast communication is similar to data communication after a radio resource control (RRC) connection is established between a terminal device and an access network device, and a unicast connection needs to be established between two terminal devices first.
  • RRC radio resource control
  • two terminal devices can communicate data based on the negotiated identity, and the data can be encrypted or unencrypted.
  • the unicast communication can only be performed between two terminal devices that have established a unicast connection.
  • the unicast communication corresponds to a pair of source layer-2 identifier (source Layer-2 identifier, source L2ID) and destination layer-2 identifier (Destination Layer-2 identifier, destination L2ID).
  • source Layer-2 identifier source Layer-2 identifier
  • destination layer-2 identifier Destination Layer-2 identifier, destination L2ID
  • the subheader of each SL MAC protocol data unit includes a source layer 2 identifier and a destination layer 2 identifier, so that the data is transmitted to the correct receiving end.
  • RB is the general term for a series of protocol entities and configurations allocated by access network devices to terminal devices. It is a service provided by layer 2 for transmitting user data between access network devices and terminal devices, including PDCP layer entities and other Series resource allocation, etc.
  • the RB can be divided into a data radio bearer (data radio bearer, DRB) and a signaling radio bearer (signalling radio bearer, SRB), the former is used to carry data, and the latter is used to carry signaling messages.
  • DRB data radio bearer
  • SRB signaling radio bearer
  • RB is called sidelink radio bearer (sidelink radio bearer, SLRB), and SLRB can be divided into sidelink data radio bearer (sidelink data radio bearer, SL DRB) and sidelink signal Make radio bearer (sidelink signaling radio bearer, SL SRB).
  • sidelink radio bearer sidelink radio bearer, SLRB
  • SLRB can be divided into sidelink data radio bearer (sidelink data radio bearer, SL DRB) and sidelink signal Make radio bearer (sidelink signaling radio bearer, SL SRB).
  • the RLC bearer refers to the protocol entity and configuration below the RLC layer, which is the lower part of the radio bearer, including a series of resources such as RLC layer entities and logical channels.
  • the RLC bearer can be divided into the RLC bearer used when the terminal device communicates with the access network device, and the RLC bearer used when the terminal device communicates with the terminal device.
  • the RLC bearer used when the terminal device communicates with the access network device may be called a Uu RLC bearer
  • the RLC bearer used when the terminal device communicates with the terminal device may be called a PC5 RLC bearer.
  • the Uu RLC bearer is the Uu link (Uu link) or the RLC bearer on the Uu interface
  • the PC5 RLC bearer is the RLC bearer on the SL or PC5 interface.
  • the Uu link is the link between the terminal device and the access network device.
  • Uu RLC bearer and PC5 RLC bearer are names, and the names are used as description examples in this application, and the names are not limited.
  • U2N Relay is a technology for a terminal device to communicate with an access network device through another terminal device.
  • U2N Relay can also be called a relay (Relay) technology.
  • the protocol architecture of U2N Relay can be seen in Figure 2.
  • the protocol stack of U2N Relay is divided into two types, one is L3 relay (L3relay), and the other is L2 relay (L2relay).
  • L3relay L3 relay
  • L2relay L2 relay
  • This application only introduces L2 relays.
  • the data packets of the remote terminal equipment (Remote UE) are relayed and forwarded below the RLC layer of the relay terminal equipment (Relay UE), that is, the relay terminal equipment only maintains the RLC bearer of the relay. Therefore, there is an end-to-end PDCP layer, service data adaptation protocol (SDAP) layer, and RRC layer between the remote terminal device and the access network device, but there is no end-to-end RLC layer, MAC layer, and PHY layer.
  • SDAP service data adaptation protocol
  • the U2N Relay protocol architecture adds an adaptation (Adapt) layer between the RLC layer and the PDCP layer.
  • the adaptation layer can be divided into an adaptation layer used when a terminal device communicates with an access network device, and an adaptation layer used when a terminal device communicates with a terminal device.
  • the adaptation layer used when the terminal device communicates with the access network device may be called the Uu adaptation layer
  • the adaptation layer used when the terminal device communicates with the terminal device may be called the PC5 adaptation layer. layer.
  • the adaptation layer in the protocol stack at both ends of the PC5 interface may be called a PC5 adaptation layer, that is, the adaptation layer in the protocol stack at both ends of the SL may be called a PC5 adaptation layer.
  • the adaptation layer in the protocol stack at both ends of the Uu interface may be referred to as the Uu adaptation layer.
  • the main function of the adaptation layer is bearer multiplexing and demultiplexing, that is, data on different radio bearers can be multiplexed onto one RLC bearer or data on one RLC bearer can be split into different radio bearers.
  • bearer For example, taking the downlink direction as an example, the adaptation layer of the access network device can multiplex the data on at least one radio bearer corresponding to each remote device in at least one remote terminal device to the same RLC bearer, that is, the Uu link
  • An RLC bearer of the at least one remote terminal device may include data on at least one radio bearer corresponding to each remote device in the at least one remote terminal device.
  • data on at least one radio bearer of the remote terminal device may be mapped to the same PC5 RLC bearer.
  • the adaptation layer of the remote terminal device can map data on multiple radio bearers of the remote terminal device to the same PC5 RLC bearer.
  • the adaptation layer of the relay terminal device can multiplex the data from at least one radio bearer corresponding to each remote device in the at least one remote terminal device to the RLC bearer of the same Uu link.
  • Service data unit service data unit, SDU
  • protocol data unit protocol data unit
  • the data unit exchanged between peer-to-peer protocol layer entities between different devices is a PDU.
  • a protocol layer passes the PDU of the protocol layer to the lower protocol layer through the service access point (service access point, SAP) (also called the service interface) provided by the adjacent lower layer protocol layer to the protocol layer, and the lower layer
  • SAP service access point
  • the protocol layer indirectly completes the exchange of the PDU of the protocol layer, and the PDU of the protocol layer is used as the SDU of the lower protocol layer.
  • the data may be regarded as the SDU of the protocol layer. If the data received by the protocol layer includes the protocol layer header of the protocol layer, the data can be regarded as the PDU of the protocol layer.
  • the adaptation layer if the data received by the adaptation layer does not include the adaptation layer header, the data packet can be considered as an SDU of the adaptation layer, if the data received by the adaptation layer includes the adaptation layer header , then the data packet can be regarded as a PDU of the adaptation layer.
  • the technical solutions of the embodiments of the present application can be applied to long term evolution (long term evolution, LTE) architecture, fifth generation mobile communication technology (5th generation mobile networks, 5G), wireless local area network (wireless local area networks, WLAN) system wait.
  • LTE long term evolution
  • 5G fifth generation mobile communication technology
  • WLAN wireless local area network
  • the technical solutions of the embodiments of the present application can also be applied to other communication systems in the future, such as 6G communication systems, etc.
  • the functions may remain the same, but the names may be changed.
  • D2D device-to-device
  • V2X vehicle to everything
  • unmanned driving unmanned driving
  • automatic driving automated driving
  • ADAS driver assistance
  • FIG. 3 is a basic architecture of a communication system provided by an embodiment of the present application.
  • the communication system may include a first terminal device 10, at least one second terminal device 20 (only one is shown in FIG. 3 ) performing SL communication with the first terminal device 10, and an The access network device 30 for communication.
  • FIG. 3 is only a schematic diagram, and does not constitute a limitation on the applicable scenarios of the technical solution provided by the present application.
  • the first terminal device 10 and the second terminal device 20 are entities on the user side for receiving signals, or sending signals, or receiving signals and sending signals.
  • the first terminal device 10 and the second terminal device 20 are used to provide users with one or more of voice services and data connectivity services.
  • the first terminal device 10 and the second terminal device 20 may be devices including a wireless transceiver function and capable of cooperating with access network devices to provide communication services for users.
  • the first terminal device 10 and the second terminal device 20 may refer to user equipment (user equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, Terminal, wireless communication device, user agent, user device or roadside unit (roadside unit, RSU).
  • UE user equipment
  • RSU roadside unit
  • the first terminal device 10 and the second terminal device 20 may also be drones, Internet of things (internet of things, IoT) devices, stations (stations, STs) in WLAN, cellular phones (cellular phones), smart phones (smart phones) phone), cordless phone, wireless data card, tablet computer, session initiation protocol (session initiation protocol, SIP) phone, wireless local loop (wireless local loop, WLL) station, personal digital assistant (PDA) device , laptop computer (laptop computer), machine type communication (machine type communication, MTC) terminal, handheld device with wireless communication function, computing device or other processing device connected to a wireless modem, vehicle-mounted device, wearable device (also It can be called wearable smart device), virtual reality (virtual reality, VR) terminal, augmented reality (augmented reality, AR) terminal, wireless terminal in industrial control (industrial control), wireless terminal in unmanned driving (self driving) Terminal, wireless terminal in remote medical, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, smart home home) in the wireless terminal, etc.
  • the first terminal device 10 and the second terminal device 20 may also be device-to-device (device to device, D2D) devices, for example, electricity meters, water meters, and the like.
  • the first terminal device 10 and the second terminal device 20 may also be terminals in a 5G system, or terminals in a next-generation communication system, which is not limited in this embodiment of the present application.
  • first terminal device 10 can also perform SL communication with terminal devices other than the second terminal device 20, and the second terminal device 20 can also perform SL communication with terminal devices other than the first terminal device 10, There is no limitation here.
  • the first terminal device 10 and the second terminal device 20 may be located within the coverage of the same access network device; or, the first terminal device 10 and the second terminal device 20 may be located within the coverage of different access network devices or, the first terminal device 10 is located within the coverage area of the access network device 30, and the second terminal device 20 is located outside the coverage area of the access network device 30, which is not limited here. It can be understood that the first terminal device 10 is a relay terminal device, and the second terminal device 20 is a remote terminal device.
  • the access network device 30 is an entity on the network side for sending a signal, or receiving a signal, or sending a signal and receiving a signal.
  • the access network device 30 may be a device deployed in a radio access network (radio access network, RAN) to provide a wireless communication function for the first terminal device 10 and the second terminal device 20, for example, it may be a transmission reception point (transmission reception point , TRP), base stations, and various forms of control nodes.
  • the access network equipment may be various forms of macro base stations, micro base stations (also called small cells), relay stations, access points (access point, AP), radio network controllers (radio network controller, RNC), Node B (node B, NB), base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved nodeB, or home node B, HNB), baseband unit (baseBand unit, BBU), transmission point (transmitting and receiving point, TRP), transmission point (transmitting point, TP), mobile switching center), etc., can also be the antenna panel of the base station.
  • RNC radio network controller
  • Node B node B
  • base station controller base station controller
  • BTS base transceiver station
  • home base station for example, home evolved nodeB, or home node B, HNB
  • baseband unit baseBand unit, BBU
  • transmission point transmitting and receiving point
  • TRP transmission point
  • TP transmission point
  • the control node can be connected to multiple base stations, and configure resources for multiple terminals under the coverage of multiple base stations.
  • the names of the equipment with base station functions may be different.
  • it can be an evolved base station (evolutional node B, eNB or eNodeB) in an LTE system, or a wireless controller in a cloud radio access network (cloud radio access network, CRAN) scenario, or a wireless controller in a 5G gNB, or the access network device 30 may be a relay station, access point, vehicle-mounted device, wearable device, and network-side device in a network after 5G or an access network device in a future evolved PLMN network.
  • the specific name of the access network device is not limited.
  • each device (such as the first terminal device 10, the second terminal device 20, the access network device 30, etc.) in FIG.
  • a functional module in the device which is not specifically limited in this embodiment of the present application. It can be understood that the above function can be a network element in a hardware device, a software function running on dedicated hardware, or a virtualization function instantiated on a platform (for example, a cloud platform).
  • FIG. 4 is a schematic diagram of a hardware structure applicable to a communication device provided by an embodiment of the present application.
  • the communication device 400 includes at least one processor 401 , a communication line 402 , a memory 403 and at least one communication interface 404 .
  • the processor 401 can be a general-purpose central processing unit (central processing unit, CPU), a microprocessor, a specific application integrated circuit (application-specific integrated circuit, ASIC), or one or more for controlling the implementation of the application program program integrated circuit.
  • CPU central processing unit
  • ASIC application-specific integrated circuit
  • Communication line 402 may include a pathway for communicating information between the above-described components.
  • the communication interface 404 is any device such as a transceiver (such as an antenna) for communicating with other devices or communication networks, such as Ethernet, RAN, wireless local area networks (wireless local area networks, WLAN) and the like.
  • a transceiver such as an antenna
  • WLAN wireless local area networks
  • Memory 403 may be read-only memory (read-only memory, ROM) or other types of static storage devices that can store static information and instructions, random access memory (random access memory, RAM) or other types that can store information and instructions It can also be an electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program code in the form of instructions or data structures and can be programmed by a computer Any other medium accessed, but not limited to.
  • the memory may exist independently and be connected to the processor through the communication line 402 . Memory can also be integrated with the processor.
  • the memory provided by the embodiment of the present application may generally be non-volatile.
  • the memory 403 is used to store computer-executed instructions for implementing the solution of the present application, and the execution is controlled by the processor 401 .
  • the processor 401 is configured to execute computer-executed instructions stored in the memory 403, so as to implement the methods provided in the following embodiments of the present application.
  • the computer-executed instructions in the embodiments of the present application may also be referred to as application program codes, which is not specifically limited in the embodiments of the present application.
  • the processor 401 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 4 .
  • the communications apparatus 400 may include multiple processors, for example, the processor 401 and the processor 407 in FIG. 4 .
  • Each of these processors may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor.
  • a processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (eg, computer program instructions).
  • the communication apparatus 400 may further include an output device 405 and an input device 406 .
  • Output device 405 is in communication with processor 401 and may display information in a variety of ways.
  • the output device 405 may be a liquid crystal display (liquid crystal display, LCD), a light emitting diode (light emitting diode, LED) display device, a cathode ray tube (cathode ray tube, CRT) display device, or a projector (projector) wait.
  • the input device 406 communicates with the processor 401 and can receive user input in various ways.
  • the input device 406 may be a mouse, a keyboard, a touch screen device, or a sensing device, among others.
  • the aforementioned communication device 400 may be a general-purpose device or a special-purpose device.
  • the communication device 400 can be a desktop computer, a portable computer, a network server, a personal digital assistant (PDA), a mobile phone, a tablet computer, a wireless terminal device, an embedded device, or a similar structure in FIG. 4 equipment.
  • PDA personal digital assistant
  • the embodiment of the present application does not limit the type of the communication device 400 .
  • the first terminal device uses the first RLC bearer when communicating with the access network device, and the first RLC bearer is used to transmit data corresponding to at least one terminal device from the access network device and/or the first RLC bearer.
  • An RLC bearer is used to transmit data from at least one terminal device. That is, the first RLC bearer is the Uu RLC bearer used when the first terminal device communicates with the access network device.
  • the first RLC bearer is used to transmit data corresponding to at least one terminal device from the access network device, which can be understood as one or more of the following: the data on the first RLC bearer comes from the Uu RLC bearer of the access network device Data corresponding to at least one terminal device.
  • the first RLC bearer is used to transmit data from at least one terminal device, which can be understood as: the data on the first RLC bearer comes from data on different PC5 RLC bearers of at least one terminal device.
  • the second terminal device is a terminal device in at least one terminal device. It should be noted that when the first RLC bearer is involved elsewhere in this application, no further explanation will be given.
  • the PC5 adaptation layer entity is an adaptation layer entity shared by at least one PC5 RLC bearer corresponding to the remote terminal device. , how to correctly submit downlink data.
  • FIG. 5A is a schematic flowchart of a data transmission method provided in an embodiment of the present application
  • FIG. 5B is a schematic flowchart of another data transmission method provided in an embodiment of the present application.
  • the method includes but not limited to the following steps:
  • the first adaptation layer entity of the first terminal device submits the first data and the first indication information to the second adaptation layer entity of the first terminal device.
  • the second adaptation layer entity of the first terminal device receives the first data and the first indication information from the first adaptation layer entity of the first terminal device.
  • the first indication information is used to indicate a radio bearer corresponding to the second terminal device transmitting the first data.
  • the first indication information is used to indicate the radio bearer corresponding to the second terminal device transmitting the first data, which can be understood as: the first indication information is used to indicate the second terminal receiving the first data The radio bearer corresponding to the device.
  • the first indication information may be implemented in any of the following manners, which are not limited here.
  • the first indication information includes the identifier of the radio bearer and the identifier of the second terminal device. It can be understood that the first adaptation layer entity of the first terminal device submits the radio bearer identifier and the identifier of the second terminal device to the second adaptation layer entity of the first terminal device, so that the second adaptation layer entity of the first terminal device The layering entity can correctly submit the first data to the correct RLC bearer.
  • the first indication information includes an identifier of a radio bearer and identifier information of a unicast connection on a sidelink, where the sidelink is a sidelink between the first terminal device and the second terminal device. It can be understood that the first adaptation layer entity of the first terminal device submits the identity of the radio bearer and the identification information of the unicast connection on the sidelink to the second adaptation layer entity of the first terminal device, so that the first terminal The second adaptation layer entity of the device can correctly submit the first data to the correct RLC bearer.
  • the radio bearer in manner 1.1 and manner 1.2 may include DRB and/or SRB, which is not limited here.
  • the identification information of the unicast connection on the sidelink may include one or more of the following: destination layer 2 identification, source layer 2 identification, which is not limited here.
  • the identification information of the unicast connection on the sidelink may be replaced by: identification information of the broadcast connection on the sidelink, identification information of the multicast connection on the sidelink, etc., which is not limited here.
  • the first indication information also includes the identity of the second terminal device, that is, the identity of the radio bearer and the identity of the unicast connection on the sidelink of the first adaptation layer entity of the first terminal device
  • the first adaptation layer entity of the first terminal device may also submit the identity of the second terminal device to the second adaptation layer of the first terminal device entity.
  • the first adaptation layer entity of the first terminal device is a Uu adaptation layer entity
  • the second adaptation layer entity of the first terminal device is a PC5 adaptation layer entity
  • the second adaptation layer entity of the first terminal device is an adaptation layer entity shared by PC5 RLC bearers corresponding to at least one terminal device. It can be understood that the PC5 RLC bearer corresponding to one terminal device may be at least one PC5 RLC bearer.
  • the first adaptation layer entity of the first terminal device and the second adaptation layer entity of the first terminal device are two independent adaptation layer entities, or the same adaptation layer entity entity, without limitation. It can be understood that if the first adaptation layer entity of the first terminal device and the second adaptation layer entity of the first terminal device are two independent adaptation layer entities, this solution adopts steps 501 to 502 to implement; if the second The first adaptation layer entity of a terminal device and the second adaptation layer entity of the first terminal device are the same adaptation layer entity, and step 502 is implemented in this solution.
  • the embodiments shown in FIG. 5A and FIG. 5B may further include: the first adaptation layer entity of the first terminal device receives fourth data from the first RLC bearer. That is, the first adaptation layer entity of the first terminal device receives the fourth data from the RLC layer entity, where the RLC layer entity is located in the first RLC bearer.
  • the fourth data includes the first data, the identifier of the radio bearer and the identifier of the second terminal device, and the identifier of the radio bearer and the identifier of the second terminal device are included in the header of the fourth data.
  • the first adaptation layer entity of the first terminal device and the second adaptation layer entity of the first terminal device are two independent adaptation layer entities
  • the first adaptation layer entity of the first terminal device receives the fourth data from the first RLC bearer before step 501; when the first adaptation layer entity of the first terminal device and the second adaptation layer entity of the first terminal device are the same adaptation layer entity
  • the step 502 is executed before the first adaptation layer entity of the first terminal device receives the fourth data from the first RLC bearer.
  • the first indication information includes the identifier of the radio bearer and the identifier of the second terminal device
  • the first adaptation layer entity of the first terminal device submits the first data and the first indication information to the second terminal device of the first terminal device.
  • the second adaptation layer entity can be implemented in any of the following ways, which are not limited here.
  • Manner 2.1 The first adaptation layer entity of the first terminal device submits the fourth data to the second adaptation layer entity of the first terminal device.
  • the fourth data is a PDU
  • the first data is an SDU. That is, the first adaptation layer entity of the first terminal device does not perform additional processing on the fourth data, so the first adaptation layer entity of the first terminal device is prevented from changing the structure of the packet header.
  • the identifier of the radio bearer and the identifier of the second terminal device are not included in the packet header of the first data, that is, the first data is an SDU. That is, the first adaptation layer entity of the first terminal device removes the header of the fourth data, and additionally indicates the identity of the radio bearer and the identity of the second terminal device. It should be understood that the first terminal device may internally implement the The identifier is associated with the identifier of the second terminal device and the first data, so the overhead can be reduced, and the downlink data delivery efficiency can be improved.
  • the first adaptation layer entity of the first terminal device generates fifth data, the fifth data includes the first data and the identification of the radio bearer; the first adaptation layer entity of the first terminal device combines the fifth data and the second The identifier of the terminal device is submitted to the second adaptation layer entity of the first terminal device, and the identifier of the second terminal device is submitted to the second adaptation layer entity through an additional instruction. It should be understood that the first terminal device may associate the identifier of the second terminal device with the first data through internal implementation.
  • the fifth data is a PDU
  • the first data is an SDU
  • the identifier of the radio bearer is included in a packet header of the fifth data.
  • the first adaptation layer entity of the first terminal device reconstructs the fifth data, because the identifier of the radio bearer is included in the header of the fifth data, but the identifier of the second terminal device is not included in the header of the fifth data, so The overhead of the packet header is saved, and the efficiency of downlink data delivery is improved.
  • the first adaptation layer entity of the first terminal device submits the first data and the first indication information to the second
  • the second adaptation layer entity of a terminal device may be implemented in any of the following ways, which are not limited here.
  • the identification information of the radio bearer and the identification information of the unicast connection on the sidelink are not included in the packet header of the first data, that is, the first data is an SDU. That is, the first adaptation layer entity of the first terminal device removes the header of the fourth data, and additionally indicates the identity of the radio bearer and the identity information of the unicast connection on the sidelink. It should be understood that the first terminal device may internally implement , associating the identification information of the unicast connection on the sidelink with the first data, so the overhead can be reduced, and the downlink data delivery efficiency can be improved.
  • the first adaptation layer entity of the first terminal device generates fifth data, and the fifth data includes the first data and the radio bearer identifier; the first adaptation layer entity of the first terminal device combines the fifth data and the side line
  • the identification information of the unicast connection on the link is submitted to the second adaptation layer entity of the first terminal device.
  • the fifth data is PDU
  • the first data is SDU
  • the identifier of the radio bearer is included in the header of the fifth data, that is, the first adaptation layer entity of the first terminal device reconstructs the fifth data, because the identifier of the radio bearer Included in the packet header of the fifth data, and the identification information of the unicast connection on the sidelink is not included in the packet header of the fifth data, but is sent to the second adaptation layer through additional indication information, so saving the packet header Overhead, improving the efficiency of downlink data delivery.
  • the first terminal device may associate the identification information of the unicast connection on the sidelink with the first data through internal implementation.
  • the identity of the second terminal device may not be included in the header of the first data; for mode 3.2, if the first indication information If the identifier of the second terminal device is also included, then the identifier of the second terminal device may or may not be included in the packet header of the fifth data, which is not limited here.
  • the first terminal The first adaptation layer entity of the device may determine the identification information of the unicast connection on the sidelink according to the identification of the second terminal device. Specifically, the first adaptation layer entity of the first terminal device determines the identification information of the unicast connection on the sidelink according to the identification of the second terminal device and the second corresponding relationship, thereby realizing the identification and identification of the second terminal device. Conversion between identification information for unicast connections on the sidelink.
  • the second correspondence includes a correspondence between the identification information of the unicast connection on the sidelink and the identification of the second terminal device.
  • the second adaptation layer entity of the first terminal device submits the first data to the second RLC bearer according to the first indication information, and the second RLC bearer is an RLC bearer used when the first terminal device communicates with the second terminal device.
  • the second RLC bearer acquires the first data from the second adaptation layer entity of the first terminal device.
  • the second RLC bearer is the RLC bearer used when the first terminal device communicates with the second terminal device. It can be understood that: the second RLC bearer is the RLC bearer of the first terminal device used when the first terminal device communicates with the second terminal device. PC5 RLC bearer.
  • the RLC bearer may be replaced by an RLC layer entity.
  • the first RLC bearer may be replaced by an RLC layer entity
  • the second RLC bearer may be replaced by an RLC layer entity, which is not limited here.
  • step 502 may include: the second adaptation layer entity of the first terminal device submits the first data to the second RLC bearer according to the identifier of the radio bearer, the identifier of the second terminal device, and the first correspondence, so that This enables the second adaptation layer entity of the first terminal device to submit data correctly, improving the reliability of downlink data transmission.
  • the first correspondence includes the correspondence between the identifier of the radio bearer, the identifier of the second terminal device, and the identifier of the second RLC bearer.
  • the first indication information includes the identifier of the radio bearer and the identifier of the second terminal device, that is, the first adaptation layer entity of the first terminal device submits the identifier of the radio bearer and the identifier of the second terminal device to the second terminal device.
  • the second adaptation layer entity of the first terminal device submits the first data to the second RLC bearer, which may be implemented in manner 4.1.
  • the first indication information includes the identification information of the radio bearer and the identification information of the unicast connection on the sidelink, that is, the first adaptation layer entity of the first terminal device combines the identification of the radio bearer with the identification information of the unicast connection on the sidelink
  • the sidelink corresponds to at least one RLC bearer
  • the second adaptation layer entity of the first terminal device submits the first data to the second adaptation layer entity
  • the second RLC bearer can be implemented in mode 4.2 or 4.3.
  • the first indication information includes the identity of the radio bearer, the identity of the second terminal device, and the identity information of the unicast connection on the sidelink, that is, the first adaptation layer entity of the first terminal device uses the identity of the radio bearer, the identity of the second
  • the sidelink corresponds to at least one RLC bearer
  • the first terminal device Submitting the first data to the second RLC bearer by the second adaptation layer entity may be implemented in manner 4.3.
  • the embodiment shown in Figure 5A and Figure 5B further includes: the second adaptation layer entity of the first terminal device determines the sidelink according to the identifier of the second terminal device and the second corresponding relationship; the sidelink is The side link between the first terminal device and the second terminal device corresponds to at least one RLC bearer on the side link; the second correspondence includes the identification information of the unicast connection on the side link and the identification information of the second terminal device Correspondence between identifiers; the second adaptation layer entity of the first terminal device submits the first data to the second RLC bearer according to the identifier of the radio bearer, the identifier of the second terminal device, and the first correspondence, including: the first The second adaptation layer entity of the terminal device submits the first data to the second RLC bearer in the at least one RLC bearer according to the identifier of the radio bearer, the identifier of the second terminal device, and the first correspondence.
  • the first terminal device's The second adaptation layer entity needs to determine the sidelink according to the identity of the second terminal device and the second corresponding relationship, so that the data can be delivered to the corresponding sidelink; further, it can be based on the identity of the radio bearer, the second The identifier of the second terminal device and the first corresponding relationship submit the first data to the second RLC bearer in the at least one RLC bearer, so that the second adaptation layer entity of the first terminal device can submit the data correctly, improving the efficiency of downlink data transmission. reliability.
  • Method 4.2 The second adaptation layer entity of the first terminal device submits the first data to the second RLC bearer according to the radio bearer identifier, the second terminal device identifier, and the first correspondence, including: the first terminal device's first
  • the second adaptation layer entity submits the first data to the second RLC bearer in the at least one RLC bearer according to the identifier of the radio bearer, the identifier of the second terminal device, and the first correspondence.
  • the second adaptation layer entity of the first terminal device may submit the data to the corresponding sidelink; further, submit the first data to the at least The second RLC bearer in one RLC bearer enables the second adaptation layer entity of the first terminal device to submit data correctly, improving the reliability of downlink data transmission.
  • the above-mentioned identifier of the second terminal device may be implemented internally of the first terminal device, and determined according to the identifier information of the unicast connection on the sidelink.
  • the first adaptation layer entity of the first terminal device also submits the identifier of the second terminal device to the second adaptation layer entity of the first terminal device.
  • the second adaptation layer entity of the first terminal device submits the first data to the second RLC bearer according to the first indication information, including: the second adaptation layer entity of the first terminal device transmits the first data to the second RLC bearer according to the radio bearer identifier, side The identification information of the unicast connection on the uplink and the third corresponding relationship deliver the first data to the second RLC bearer.
  • the second adaptation layer entity of the first terminal device may submit the data to the corresponding sidelink; further, according to the identifier of the radio bearer, the identifier information of the unicast connection on the sidelink, and the third corresponding relationship, the second The data is submitted to the second RLC bearer, so that the second adaptation layer entity of the first terminal device can correctly submit the data, and the reliability of downlink data transmission is improved.
  • the third correspondence includes the correspondence between the identifier of the radio bearer, the identifier information of the unicast connection on the sidelink, and the identifier of the second RLC bearer.
  • the second adaptation layer entity of the first terminal device in mode 4.3 submits the first data to the second RLC according to the identifier of the radio bearer, the identifier information of the unicast connection on the sidelink, and the third correspondence
  • the bearer can be understood as: the second adaptation layer entity of the first terminal device submits the first data to at least one RLC bearer according to the identifier of the radio bearer, the identifier information of the unicast connection on the sidelink, and the third corresponding relationship The second RLC bearer.
  • At least one RLC bearer is the PC5 RLC bearer of the first terminal device used when the first terminal device communicates with the second terminal device.
  • the embodiments shown in FIG. 5A and FIG. 5B may further include: the second adaptation layer entity of the first terminal device generates second data; the second data includes the first data and the second Indication information; the second indication information includes the identifier of the radio bearer, or the second indication information includes the identifier of the radio bearer and the identifier of the second terminal device; the second adaptation layer entity of the first terminal device according to the identifier of the radio bearer, the identifier of the second terminal device The identity of the second terminal device and the first corresponding relationship.
  • Submitting the first data to the second RLC bearer in the at least one RLC bearer includes: the second adaptation layer entity of the first terminal device according to the identity of the radio bearer, the second terminal device Submit the second data to the second RLC bearer in the at least one RLC bearer, so that the second adaptation layer entity of the first terminal device can correctly submit the data, and improve the reliability of downlink data transmission.
  • the second data is a PDU
  • the second indication information is included in a packet header of the second data. It can be understood that, for mode 2.1, the identifier of the radio bearer and the identifier of the second terminal device are included in the packet header of the second data; in the Baotou.
  • the embodiment shown in FIG. 5A and FIG. 5B may further include: the second adaptation layer entity of the first terminal device generates third data; the third data includes the first data and second indication information; The second indication information includes the identification of the radio bearer; the second adaptation layer entity of the first terminal device submits the first data to the first terminal device according to the identification of the radio bearer, the identification information of the unicast connection on the sidelink, and the third corresponding relationship.
  • Two RLC bearers including: the second adaptation layer entity of the first terminal device submits the third data to the second RLC bearer according to the identification of the radio bearer, the identification information of the unicast connection on the sidelink and the third corresponding relationship, This enables the second adaptation layer entity of the first terminal device to submit data correctly, improving the reliability of downlink data transmission.
  • the third data is a PDU
  • the identifier of the radio bearer is included in the packet header of the third data.
  • the second adaptation layer entity of the first terminal device submits the third data to the second RLC bearer according to the identifier of the radio bearer, the identifier information of the unicast connection on the sidelink, and the third corresponding relationship, which can be understood as:
  • the second adaptation layer entity of the first terminal device submits the third data to the second RLC bearer in the at least one RLC bearer according to the identifier of the radio bearer, the identifier information of the unicast connection on the sidelink, and the third corresponding relationship.
  • the first adaptation layer entity of the first terminal device submits the first data and the first indication information to the second adaptation layer entity of the first terminal device, so that the first adaptation layer entity of the first terminal device
  • the second adaptation layer entity can correctly deliver the first data to the second RLC bearer according to the first indication information, which improves the reliability of downlink data transmission.
  • the embodiments shown in FIG. 5A and FIG. 5B may further include: the first terminal device receives first configuration information from the access network device, and correspondingly, the access network device sends the first configuration information to the first terminal device.
  • the first configuration information includes one or more of the following: a first correspondence, a second correspondence, and a third correspondence, and the first configuration information is used to indicate one or more of the following: the first correspondence is the first The configuration information of the second adaptation layer of the terminal device; the second correspondence is the configuration information of the first adaptation layer of the first terminal device and/or the configuration information of the second adaptation layer of the first terminal device; the third correspondence is the configuration information of the first adaptation layer of the first terminal device Configuration information of the second adaptation layer of a terminal device.
  • the first configuration information may be included in RRC signaling or other signaling, which is not limited here. It can be understood that the first configuration information may be sent by the access network device to the first terminal device when the access network device receives a configuration information request message from the first terminal device, or the first configuration information may be sent by the access network device It is sent to the first terminal device, which is not limited here.
  • the configuration information request message may be used to instruct the access network device to send the first configuration information.
  • the first correspondence is the configuration information of the PC5 adaptation layer of the first terminal device;
  • the second correspondence is The configuration information of the PC5 adaptation layer of the first terminal device, that is, the first configuration information includes the first correspondence and the second correspondence, and the first configuration information is used to indicate one or more of the following: the first correspondence is the first Configuration information of the PC5 adaptation layer of the terminal device; the second correspondence is configuration information of the PC5 adaptation layer of the first terminal device.
  • the first corresponding relationship is the configuration information of the PC5 adaptation layer of the first terminal device; the second corresponding relationship is the first The configuration information of the Uu adaptation layer of the terminal device and/or the PC5 adaptation layer of the first terminal device, that is, the first configuration information includes the first correspondence and the second correspondence, and the first configuration information is used to indicate the following one or Multiple items: the first correspondence is the configuration information of the PC5 adaptation layer of the first terminal device; the second correspondence is the configuration information of the Uu adaptation layer of the first terminal device and the PC5 adaptation layer of the first terminal device.
  • the second correspondence is the configuration information of the Uu adaptation layer of the first terminal device;
  • the third correspondence is the first Configuration information of the PC5 adaptation layer of the terminal device.
  • the configuration information of the Uu adaptation layer of the first terminal device and the configuration information of the PC5 adaptation layer of the first terminal device may be contained in the same information element or different information elements, which are not limited here.
  • the configuration information of the Uu adaptation layer of the first terminal device and the configuration information of the PC5 adaptation layer of the first terminal device are contained in the same information element
  • the configuration information of the Uu adaptation layer of the first terminal device may be included in the first information element.
  • the first cell may be a predefined cell or a fixed cell, which is not limited here.
  • the first information element may be an Adapt-Config information element, or an information element with a similar definition or function, or an information element with an extended field, which is not limited here.
  • the first cell when implementing the embodiments shown in FIG. 5A and FIG. 5B by using any of modes 2.1-2.3 and mode 4.1, the first cell may include the first sub-cell.
  • the first cell when implementing the embodiment shown in FIG. 5A and FIG. 5B in any of modes 3.1-mode 3.2 and mode 4.2, the first cell may include the first sub-cell, and optionally, the first cell may also include the second sub-cell.
  • the first sub-information element may include one or more of the following: an identifier of a radio bearer, an identifier of a second terminal device, and an identifier of a second RLC bearer, and the first sub-information element is used to indicate the first correspondence.
  • the first sub-cell may be a predefined cell or a fixed cell, which is not limited here.
  • the first sub-information element may be a MappingInfo information element in a Bearer-MappingInfoList information element, or an information element with a similar definition or function, or an information element with an extended field, which is not limited here.
  • the second sub-information element may include one or more of the following: identification information of the unicast connection on the sidelink, an identification of the terminal device, and the second sub-information element is used to indicate the second corresponding relationship.
  • the second sub-cell may be a predefined cell or a fixed cell, which is not limited here.
  • the second sub-information element may be a dst-mappingInfo information element in the DST-MappingInfoList information element, or an information element with a similar definition or function, or an information element with an extended field, which is not limited here.
  • the first sub-information element may also include the first RLC
  • the first sub-information element is also used to indicate the correspondence between the identifier of the radio bearer, the identifier of the second terminal device, and the identifier of the first RLC bearer.
  • the first cell when the first cell includes a first sub-cell and a second sub-cell, the first cell may be:
  • the Bearer-MappingInfoList information element may include the first corresponding relationship, and the access network device may configure the maxNrofRemoteUEs group corresponding relationship at most, and maxNrofbearers is the maximum number of bearers corresponding to the terminal equipment that the first terminal equipment can relay.
  • the DST-MappingInfoList information element may include the second corresponding relationship, and the access network device may configure a maxNrofRemoteUEs group corresponding relationship at most, where maxNrofRemoteUEs is the number of terminal devices that can be connected to the first terminal device.
  • DRB-ID is the identifier of the radio bearer
  • Remote-UE-ID is the identifier of the second terminal device
  • PC5-RLC-bearer-id is the identifier of the second RLC bearer
  • Uu-RLC-bearer-id is the identifier of the second RLC bearer.
  • DestinationIndex is the identifier information of the unicast connection on the sidelink.
  • the first cell may include a second sub-cell and a third sub-cell.
  • the third sub-information element may include one or more of the following: the identification of the radio bearer, the identification information of the unicast connection on the sidelink, the identification of the second RLC bearer, and the third sub-information element is used to indicate the third corresponding relationship.
  • the third sub-cell may be a predefined cell or a fixed cell, which is not limited here.
  • the third sub-information element may be a MappingInfo information element in a Bearer-MappingInfoList information element, or an information element with a similar definition or function, or an information element with an extended field, which is not limited here.
  • the configuration information of the Uu adaptation layer of the first terminal device and the configuration information of the PC5 adaptation layer of the first terminal device are included in different information elements, the configuration information of the Uu adaptation layer of the first terminal device The information is included in the second information element, and the configuration information of the PC5 adaptation layer of the first terminal equipment is included in the third information element.
  • the second information element may be a predefined information element or a fixed information element, which is not limited here.
  • the second information element may be a Uu-Adapt-Config information element, or an information element with a similar definition or function, or an information element with an extended field, which is not limited here.
  • the third information element may be a predefined information element or a fixed information element, which is not limited here.
  • the third information element may be a PC5-Adapt-Config information element, or an information element with a similar definition or function, or an information element with an extended field, which is not limited here.
  • the third cell includes the first sub-cell and the second sub-cell.
  • the second cell may include the second sub-cell
  • the third cell may include the first sub-cell cell.
  • the third information element may further include a second sub-information element.
  • the second cell may include a second sub-cell
  • the third cell may include a third sub-cell cell
  • the second information element may be:
  • the first terminal device receives the first configuration information from the access network device, so that the first terminal device can correctly submit data between different protocol layer entities according to the first configuration information, which improves data transmission. reliability.
  • FIG. 6A is a schematic flowchart of another data transmission method provided by the embodiment of the present application
  • FIG. 6B is a schematic flowchart of another data transmission method provided by the embodiment of the present application.
  • the method includes but is not limited to the following steps:
  • the first adaptation layer entity of the first terminal device submits the first data and the first indication information to the second adaptation layer entity of the first terminal device.
  • the second adaptation layer entity of the first terminal device receives the first data and the first indication information from the first adaptation layer entity of the first terminal device.
  • the first indication information is used to indicate a radio bearer corresponding to the second terminal device transmitting the first data.
  • the first indication information is used to indicate the radio bearer corresponding to the second terminal device transmitting the first data, which can be understood as: the first indication information is used to indicate the second terminal device sending the first data The radio bearer corresponding to the device.
  • the first indication information may be implemented in any of the following manners, which are not limited here.
  • the first indication information includes the identifier of the radio bearer and the identifier of the second terminal device. It can be understood that the first adaptation layer entity of the first terminal device submits the radio bearer identifier and the identifier of the second terminal device to the second adaptation layer entity of the first terminal device, so that the second adaptation layer entity of the first terminal device The layering entity can correctly submit the first data to the correct RLC bearer.
  • the first indication information includes an identifier of a radio bearer and identifier information of a unicast connection on a sidelink, where the sidelink is a sidelink between the first terminal device and the second terminal device. It can be understood that the first adaptation layer entity of the first terminal device submits the identity of the radio bearer and the identification information of the unicast connection on the sidelink to the second adaptation layer entity of the first terminal device, so that the first terminal The second adaptation layer entity of the device can correctly submit the first data to the correct RLC bearer.
  • the radio bearer in manner 1.1 and manner 1.2 may include DRB and/or SRB, which is not limited here.
  • the first adaptation layer entity of the first terminal device is a PC5 adaptation layer entity
  • the second adaptation layer entity of the first terminal device is a Uu adaptation layer entity
  • the first adaptation layer entity of the first terminal device is an adaptation layer entity shared by PC5 RLC bearers corresponding to at least one terminal device. It can be understood that the PC5 RLC bearer corresponding to one terminal device may be at least one PC5 RLC bearer.
  • the first adaptation layer entity of the first terminal device and the second adaptation layer entity of the first terminal device are two independent adaptation layer entities, or the same adaptation layer entity entity, without limitation. It can be understood that if the first adaptation layer entity of the first terminal device and the second adaptation layer entity of the first terminal device are two independent adaptation layer entities, this solution adopts steps 601 to 602 to implement; if the second The first adaptation layer entity of a terminal device and the second adaptation layer entity of the first terminal device are the same adaptation layer entity, and step 602 is implemented in this solution.
  • the embodiment shown in FIG. 6A and FIG. 6B may further include: the first adaptation layer entity of the first terminal device receives third data from the second RLC bearer; the third data includes the identifier of the radio bearer and the first data , that is, the identifier of the radio bearer is included in the packet header of the third data; or, the third data includes the identifier of the radio bearer, the identifier of the second terminal device and the first data, that is, the identifier of the radio bearer and the identifier of the second terminal device include In the packet header of the third data.
  • the first adaptation layer entity RLC layer entity of the first terminal device receives the third data, and the RLC layer entity is located in the second RLC bearer.
  • the second RLC bearer is the RLC bearer used when the first terminal device communicates with the second terminal device, that is, the second RLC bearer is the PC5 RLC bearer of the first terminal device used when the first terminal device communicates with the second terminal device. It can be understood that when the first adaptation layer entity of the first terminal device and the second adaptation layer entity of the first terminal device are two independent adaptation layer entities, the first adaptation layer entity of the first terminal device The layer entity receives the third data from the second RLC bearer before step 601; in the case that the first adaptation layer entity of the first terminal device and the second adaptation layer entity of the first terminal device are the same adaptation layer entity
  • the step 602 is performed before the first adaptation layer entity of the first terminal device receives the third data from the second RLC bearer.
  • the first adaptation layer entity of the first terminal device submits the first data and the first indication information to the second terminal device of the first terminal device.
  • the second adaptation layer entity can be implemented in any of the following ways, which are not limited here.
  • the first adaptation layer entity of the first terminal device generates fourth data
  • the fourth data includes the first data, the radio bearer identifier and the first data.
  • the identification of the second terminal device; the first adaptation layer entity of the first terminal device submits the fourth data to the second adaptation layer entity of the first terminal device.
  • the fourth data is a PDU
  • the first data is an SDU
  • the identifier of the radio bearer and the identifier of the second terminal device are included in the header of the fourth data, that is, the first adaptation layer entity of the first terminal device reconstructs the third data.
  • the radio bearer identifier and the second terminal device identifier are not included in the packet header of the first data, and the first data is an SDU. That is, the first adaptation layer entity of the first terminal device removes the packet header of the third data, and additionally indicates the identifier of the radio bearer and the identifier of the second terminal device, so overhead can be reduced and uplink data delivery efficiency can be improved.
  • Method 2.3 In the case where the third data includes the radio bearer identifier and the first data, the first adaptation layer entity of the first terminal device submits the third data and the identifier of the second terminal device to the first Two adaptation layer entities.
  • the third data is PDU
  • the first data is SDU, that is, the first adaptation layer entity of the first terminal device does not process the third data, so it is avoided that the first adaptation layer entity of the first terminal device changes the packet header Structure.
  • the first adaptation layer entity of the first terminal device submits the third data to the first terminal device's first data.
  • Two adaptation layer entities wherein, the third data is PDU, and the first data is SDU, that is, the first adaptation layer entity of the first terminal device does not process the third data, so it is avoided that the first adaptation layer entity of the first terminal device changes the packet header Structure.
  • the first adaptation layer entity of the first terminal device submits the first data and the first indication information to the second
  • the second adaptation layer entity of a terminal device may be implemented in any of the following ways, which are not limited here.
  • the third data includes the radio bearer identification and the first data
  • the radio bearer identification and the identification information of the unicast connection on the sidelink are not included in the header of the first data
  • the first data is SDU, that is, the first adaptation layer entity of the first terminal device removes the header of the third data, and additionally indicates the identity of the radio bearer and the identity information of the unicast connection on the sidelink, so the overhead can be reduced and the uplink data can be improved. delivery efficiency.
  • the first adaptation layer entity of the first terminal device submits the third data and the identification information of the unicast connection on the sidelink to the second A second adaptation layer entity of a terminal device.
  • the fourth data is PDU
  • the first data is SDU, that is, the first adaptation layer entity of the first terminal device does not process the third data, and additionally indicates the identity of the radio bearer and the unicast connection on the sidelink Therefore, the first adaptation layer entity of the first terminal device is prevented from changing the structure of the packet header.
  • the first adaptation layer entity of the first terminal device needs to determine the identity of the second terminal device. Specifically, the first adaptation layer entity of the first terminal device determines the identity of the second terminal device according to the identification information of the unicast connection on the sidelink and the first corresponding relationship, thereby realizing the unicast connection on the sidelink Conversion of the connection identification information and the identification of the second terminal device.
  • the sidelink is a sidelink for transmitting the first data. Wherein, the sidelink is a sidelink for transmitting the first data.
  • the first correspondence includes a correspondence between identification information of the unicast connection on the sidelink and an identification of the second terminal device.
  • the second adaptation layer entity of the first terminal device submits the first data to the first RLC bearer according to the first indication information.
  • the first RLC bearer acquires the first data from the second adaptation layer entity of the first terminal device.
  • step 602 may include: the second adaptation layer entity of the first terminal device submits the first data to the first RLC bearer according to the identifier of the radio bearer, the identifier of the second terminal device, and the second correspondence, so that This enables the second adaptation layer entity of the first terminal device to submit data correctly, improving the reliability of uplink data transmission.
  • the second corresponding relationship includes a corresponding relationship between the identifier of the radio bearer, the identifier of the second terminal device, and the identifier of the first RLC bearer.
  • the embodiments shown in FIG. 6A and FIG. 6B further include: the second adaptation layer entity of the first terminal device according to the side line
  • the identification information of the unicast connection on the link and the first corresponding relationship determine the identification of the second terminal device, thereby realizing conversion between the identification information of the unicast connection on the side link and the identification of the second terminal device.
  • the second adaptation layer entity of the first terminal device may , the identifier of the second terminal device and the second corresponding relationship are performed before the first data is delivered to the first RLC bearer.
  • the embodiments shown in FIG. 6A and FIG. 6B may further include: the second adaptation layer entity of the first terminal device generates second data; the second data includes the first data and second indication information; the second indication information Including the identification of the radio bearer and the identification of the second terminal device; the second adaptation layer entity of the first terminal device submits the first data to the first RLC according to the identification of the radio bearer, the identification of the second terminal device and the second correspondence
  • the bearer includes: the second adaptation layer entity of the first terminal device submits the second data to the first RLC bearer according to the identifier of the radio bearer, the identifier of the second terminal device, and the second correspondence, so that the first RLC bearer of the first terminal device
  • the second adaptation layer entity can submit data correctly, which improves the reliability of uplink data transmission.
  • the second data is a PDU
  • the second indication information is included in a packet header of the second data.
  • the first adaptation layer entity of the first terminal device submits the first data and the first indication information to the second adaptation layer entity of the first terminal device, so that the first adaptation layer entity of the first terminal device
  • the second adaptation layer entity can correctly deliver the first data to the first RLC bearer according to the first indication information, which improves the reliability of uplink data transmission.
  • the embodiments shown in FIG. 6A and FIG. 6B may further include: the first terminal device receives first configuration information from the access network device, and correspondingly, the access network device sends the first configuration information to the first terminal device.
  • the first configuration information includes one or more of the following: first correspondence, second correspondence; the first configuration information is used to indicate one or more of the following: the first correspondence is the first The configuration information of the adaptation layer and/or the second adaptation layer of the first terminal device; the second correspondence is the configuration information of the second adaptation layer of the first terminal device.
  • the first configuration information may be included in RRC signaling or other signaling, which is not limited here. It can be understood that the first configuration information may be sent by the access network device to the first terminal device when the access network device receives a configuration information request message from the first terminal device, or the first configuration information may be sent by the access network device It is sent to the first terminal device, which is not limited here.
  • the configuration information request message may be used to instruct the access network device to send the first configuration information.
  • the first corresponding relation is the configuration information of the PC5 adaptation layer of the first terminal device;
  • the second corresponding relation is the Uu of the first terminal device
  • the configuration information of the adaptation layer that is, the first configuration information includes a first correspondence and a second correspondence, and the first configuration information is used to indicate one or more of the following: the first correspondence is adapted to the PC5 of the first terminal device Layer configuration information; the second correspondence is the configuration information of the Uu adaptation layer of the first terminal device; when implementing the embodiment shown in Figure 6A and Figure 6B in any manner in mode 2.4, the second correspondence is the first terminal
  • the configuration information of the Uu adaptation layer of the device that is, the first configuration information includes the second correspondence, and the first configuration information is used to indicate that the second correspondence is the configuration information of the Uu adaptation layer of the first terminal device; in the method 3.1 -
  • the first configuration information is used to indicate that the second correspondence is the configuration information of the Uu adaptation layer of the first terminal device; in the method 3.1 -
  • the first correspondence is the configuration information of the Uu adaptation layer of the first terminal device;
  • the second correspondence is the Uu adaptation layer of the first terminal device configuration information, that is, the first configuration information includes a first correspondence and a second correspondence, and the first configuration information is used to indicate one or more of the following: the first correspondence is the configuration of the Uu adaptation layer of the first terminal device information; the second correspondence is configuration information of the Uu adaptation layer of the first terminal device.
  • the configuration information of the PC5 adaptation layer of the first terminal device and the configuration information of the Uu adaptation layer of the first terminal device may be included in the same information element or different information elements, which are not limited here.
  • the configuration information of the PC5 adaptation layer of the first terminal device and the configuration information of the Uu adaptation layer of the first terminal device are contained in the same information element
  • the configuration information of the PC5 adaptation layer of the first terminal device may be included in the first information element.
  • the first cell may be a predefined cell or a fixed cell, which is not limited here.
  • the first information element may be an Adapt-Config information element, or an information element with a similar definition or function, or an information element with an extended field, which is not limited here.
  • the first cell may include a first sub-cell and a second sub-cell.
  • the first sub-information element may include one or more of the following: identification information of the unicast connection on the sidelink, an identification of the terminal device, and the first sub-information element is used to indicate the first corresponding relationship.
  • the first sub-cell may be a predefined cell or a fixed cell, which is not limited here.
  • the first sub-information element may be a dst-mappingInfo information element in the DST-MappingInfoList, or an information element with a similar definition or function, or an information element with an extended field, which is not limited here.
  • the second sub-information element may include one or more of the following: the identifier of the radio bearer, the identifier of the second terminal device, and the identifier of the first RLC bearer, and the second sub-information element is used to indicate the second correspondence.
  • the second sub-cell may be a predefined cell or a fixed cell, which is not limited here.
  • the second sub-information element may be a MappingInfo information element in the Bearer-MappingInfoList, or an information element with a similar definition or function, or an information element with an extended field, which is not limited here.
  • the first information element may include the second sub-information element.
  • the first cell may include a first sub-cell and a second sub-cell.
  • the second sub-information element may also include a second RLC
  • the identifier of the bearer, the second sub-information element is also used to indicate the correspondence between the identifier of the radio bearer, the identifier of the second terminal device, and the identifier of the second RLC bearer.
  • the configuration of the Uu adaptation layer of the first terminal device and the configuration information of the Uu adaptation layer of the first terminal device are contained in different information elements
  • the configuration of the Uu adaptation layer of the first terminal device The information is included in the second information element
  • the configuration information of the PC5 adaptation layer of the first terminal equipment is included in the third information element.
  • the second information element may be a predefined information element or a fixed information element, which is not limited here.
  • the second information element may be a Uu-Adapt-Config information element, or an information element with a similar definition or function, or an information element with an extended field, which is not limited here.
  • the third information element may be a predefined information element or a fixed information element, which is not limited here.
  • the third information element may be a PC5-Adapt-Config information element, or an information element with a similar definition or function, or an information element with an extended field, which is not limited here.
  • the second cell may include the second sub-cell
  • the third cell may include the first sub-cell
  • the second information element may include the first sub-information element.
  • the second cell may include a first sub-cell and a second sub-cell.
  • the first terminal device The configuration information received from the access network device includes the first configuration information involved in the embodiment shown in Figure 5A and Figure 5B and the first configuration information involved in the embodiment shown in Figure 6A and Figure 6B, that is, the access network device can set the The configuration information involved in the downlink data transmission and the configuration information involved in the uplink data transmission are delivered to the first terminal device at the same time.
  • the configuration information of the Uu adaptation layer of the first terminal device and the configuration information of the PC5 adaptation layer of the first terminal device may be included in the same information element or in different information elements. Do limit.
  • the configuration information of the Uu adaptation layer of the first terminal device and the configuration information of the PC5 adaptation layer of the first terminal device are included in the same information element, the first The configuration information of the Uu adaptation layer of the terminal device and the configuration information of the PC5 adaptation layer of the first terminal device, and the configuration information and the configuration information of the Uu adaptation layer of the first terminal device involved in the embodiment shown in Figure 6A and Figure 6B
  • the configuration information of the PC5 adaptation layer of the first terminal device is all included in the same information element.
  • the first terminal device involved in the embodiment shown in Figure 5A and Figure 5B The configuration information of the Uu adaptation layer, and the configuration information of the Uu adaptation layer of the first terminal device involved in the embodiment shown in Figure 6A and Figure 6B are all included in the same information element; the embodiment shown in Figure 5A and Figure 5B
  • the configuration information of the PC5 adaptation layer of the first terminal device involved, and the configuration information of the PC5 adaptation layer of the first terminal device involved in the embodiment shown in FIG. 6A and FIG. 6B are both included in the same information element.
  • the first terminal device receives the first configuration information from the access network device, so that the first terminal device can correctly submit data between different protocol layer entities according to the first configuration information, which improves data transmission. reliability.
  • multiple PC5 adaptation layer entities are configured on the first terminal device, and one PC5 adaptation layer entity among the multiple PC5 adaptation layer entities is a PC5 RLC corresponding to a remote terminal device.
  • the adaptation layer entity used by the bearer how to correctly submit the downlink data.
  • FIG. 7A is a schematic flowchart of another data transmission method provided by the embodiment of the present application
  • FIG. 7B is a schematic flowchart of another data transmission method provided by the embodiment of the present application.
  • the method includes but not limited to the following steps:
  • the first adaptation layer entity of the first terminal device submits the first data and the second indication information to the second adaptation layer entity of the first terminal device according to the first indication information.
  • the second adaptation layer entity of the first terminal device receives the first data and the second indication information from the first adaptation layer entity of the first terminal device.
  • the first indication information is used to indicate the second terminal device that transmits the first data, and the first indication information is an identifier of the second terminal device.
  • the second indication information is used to indicate the radio bearer, and the second indication information includes an identifier of the radio bearer.
  • the radio bearer may include DRB and/or SRB, which is not limited here.
  • the first adaptation layer entity of the first terminal device is a Uu adaptation layer entity
  • the second adaptation layer entity of the first terminal device is a PC5 adaptation layer entity
  • the second adaptation layer entity of the first terminal device is an adaptation layer entity used by a PC5 RLC bearer corresponding to a terminal device. It can be understood that the PC5 RLC bearer corresponding to one terminal device may be at least one PC5 RLC bearer.
  • the first adaptation layer entity of the first terminal device and the second adaptation layer entity of the first terminal device are two independent adaptation layer entities, or the same adaptation layer entity entity, without limitation. It can be understood that if the first adaptation layer entity of the first terminal device and the second adaptation layer entity of the first terminal device are two independent adaptation layer entities, this solution adopts steps 701 to 702 to implement; if the second The first adaptation layer entity of a terminal device and the second adaptation layer entity of the first terminal device are the same adaptation layer entity, and step 702 is implemented in this solution.
  • step 701 may include: the first adaptation layer entity of the first terminal device determines the second Adaptation layer entity: the first adaptation layer entity of the first terminal device submits the first data and the second indication information to the second adaptation layer entity of the first terminal device, so that the first adaptation layer entity of the first terminal device can The distribution entity correctly submits the downstream data.
  • the multiple adaptation layer entities may be the adaptation layer entities used by the PC5 RLC bearer corresponding to each terminal device among the multiple terminal devices, that is, one PC5 adaptation layer entity used by the PC5 RLC bearer corresponding to each terminal device.
  • the first correspondence includes one or more of the following:
  • the embodiment shown in FIG. 7A and FIG. 7B may further include: the first adaptation layer entity of the first terminal device receives third data from the first RLC bearer, and the third data includes the first data and an identifier of the radio bearer. and the identifier of the second terminal device, the identifier of the radio bearer and the identifier of the second terminal device are included in the packet header of the third data.
  • the first adaptation layer entity of the first terminal device receives the third data from the RLC layer entity, where the RLC layer entity is included in the first RLC bearer.
  • the first adaptation layer entity of the first terminal device and the second adaptation layer entity of the first terminal device are two independent adaptation layer entities
  • the first adaptation layer entity of the first terminal device Receiving the third data from the first RLC bearer is performed before step 701;
  • the second adaptation layer entity of the first terminal device are the same adaptation layer entity, the second The step 702 is executed before the first adaptation layer entity of a terminal device receives the third data from the first RLC bearer.
  • the first adaptation layer entity of the first terminal device submits the first data and the second indication information to the second adaptation layer entity of the first terminal device, which may be implemented in any of the following ways, which are not limited here .
  • the first adaptation layer entity of the first terminal device generates fourth data, and the fourth data includes the first data and the radio bearer identifier; the first adaptation layer entity of the first terminal device submits the fourth data to the second A second adaptation layer entity of a terminal device.
  • the fourth data is PDU
  • the first data is SDU
  • the identifier of the radio bearer is included in the header of the fourth data, that is, the first adaptation layer entity of the first terminal device reconstructs the fourth data, so that the second terminal device
  • the identifier of is not included in the fourth data, so the overhead of the packet header is saved, and the efficiency of downlink data submission is improved.
  • Manner 1.2 The first adaptation layer entity of the first terminal device submits the third data to the second adaptation layer entity of the first terminal device.
  • the third data is PDU
  • the first data is SDU, that is, the first adaptation layer entity of the first terminal device does not perform additional processing on the third data, so the change of the first adaptation layer entity of the first terminal device is avoided.
  • the structure of the header is PDU
  • SDU the first adaptation layer entity of the first terminal device does not perform additional processing on the third data, so the change of the first adaptation layer entity of the first terminal device is avoided.
  • the radio bearer identifier is not included in the header of the first data, and the first data is an SDU, that is, the first adaptation layer entity of the first terminal device removes the header of the third data and additionally indicates the identifier of the radio bearer, Therefore, the overhead can be reduced, and the downlink data delivery efficiency can be improved.
  • the second adaptation layer entity of the first terminal device submits the first data to the second RLC bearer according to the second indication information, where the second RLC bearer is the RLC bearer used when the first terminal device communicates with the second terminal device.
  • the second RLC bearer acquires the first data from the second adaptation layer entity of the first terminal device.
  • the second RLC bearer is the RLC bearer used when the first terminal device communicates with the second terminal device. It can be understood that: the second RLC bearer is the RLC bearer of the first terminal device used when the first terminal device communicates with the second terminal device. PC5 RLC bearer.
  • step 702 may include: the second adaptation layer entity of the first terminal device submits the first data to the second RLC bearer according to the radio bearer identifier and the second correspondence, so that the first terminal device's The second adaptation layer entity correctly submits the downlink data, which improves the reliability of downlink data transmission. It can be understood that for modes 1.1 and 1.3, after the second adaptation layer entity of the first terminal device receives the radio bearer identifier from the first adaptation layer entity of the first terminal device, the second adaptation layer entity of the first terminal device The layer entity may deliver the first data to the second RLC bearer according to the identifier of the radio bearer and the second corresponding relationship.
  • the second corresponding relationship includes a corresponding relationship between the identifier of the radio bearer, the identifier of the second terminal device, and the identifier of the second RLC bearer.
  • the second indication information further includes an identifier of the second terminal device, and the second indication information is also used to indicate the second terminal device receiving the first data, and the second adaptation layer entity of the first terminal device according to the radio bearer
  • Submitting the first data to the second RLC bearer with the identifier and the second correspondence may include: the second adaptation layer entity of the first terminal device sends the first data to the second RLC bearer according to the identifier of the radio bearer, the identifier of the second terminal device, and the second correspondence.
  • the data is submitted to the second RLC bearer, so that the second adaptation layer entity of the first terminal device can correctly submit the downlink data, and the reliability of downlink data transmission is improved.
  • the first terminal device's The second adaptation layer entity may submit the first data to the second RLC bearer according to the identifier of the radio bearer, the identifier of the second terminal device, and the second correspondence.
  • the embodiments shown in FIG. 7A and FIG. 7B may further include: the second adaptation layer entity of the first terminal device generates second data; the second data includes the first data and third indication information; the third indication information Including the identification of the radio bearer, or, the third indication information includes the identification of the radio bearer and the identification of the second terminal device; the second adaptation layer entity of the first terminal device according to the identification of the radio bearer, the identification of the second terminal device and the The second correspondence relationship submits the first data to the second RLC bearer, including: the second adaptation layer entity of the first terminal device submits the second data to the second RLC bearer according to the identifier of the radio bearer, the identifier of the second terminal equipment, and the second correspondence relationship
  • the second RLC bearer enables the second adaptation layer entity of the first terminal device to correctly submit downlink data, thereby improving the reliability of downlink data transmission.
  • the second data is a PDU
  • the third indication information is included in the header of the second data.
  • the identifier of the radio bearer is included in the header of the second data; for mode 1.2, the identifier of the radio bearer and the identifier of the second terminal device are included in the header of the second data.
  • the first adaptation layer entity of the first terminal device submits the first data and the second indication information to the second adaptation layer entity of the first terminal device according to the first indication information, so that the second adaptation layer entity of the first terminal device
  • the second adaptation layer entity of a terminal device can correctly deliver the first data to the second RLC bearer according to the second indication information, which improves the reliability of uplink data transmission.
  • the embodiments shown in FIG. 7A and FIG. 7B may further include: the first terminal device receives first configuration information from the access network device, and correspondingly, the access network device sends the first configuration information to the first terminal device.
  • the first configuration information includes one or more of the following: first correspondence, second correspondence; the first configuration information is used to indicate one or more of the following: the first correspondence is the first Configuration information of the adaptation layer; the second correspondence is configuration information of the second adaptation layer of the first terminal device.
  • the first configuration information may be included in RRC signaling or other signaling, which is not limited here. It can be understood that the first configuration information may be sent by the access network device to the first terminal device when the access network device receives a configuration information request message from the first terminal device, or the first configuration information may be sent by the access network device It is sent to the first terminal device, which is not limited here.
  • the configuration information request message may be used to instruct the access network device to send the first configuration information.
  • the configuration information of the first adaptation layer of the first terminal device and the configuration information of the second adaptation layer of the first terminal device may be contained in the same information element or in different information elements, that is, the configuration information of the first terminal device
  • the configuration information of the Uu adaptation layer and the configuration information of the PC5 adaptation layer of the first terminal device may be included in the same information element or in different information elements, which is not limited here.
  • the configuration information of the Uu adaptation layer of the first terminal device and the configuration information of the PC5 adaptation layer of the first terminal device are contained in the same information element
  • the configuration information of the Uu adaptation layer of the first terminal device may be included in the first information element.
  • the first cell may be a predefined cell or a fixed cell, which is not limited here.
  • the first information element may be an Adapt-Config information element, or an information element with a similar definition or function, or an information element with an extended field, which is not limited here.
  • the first cell may include a first sub-cell and a second sub-cell.
  • the first sub-information element may include one or more of the following: identification information of the unicast connection on the sidelink, the identification of the second terminal device, the identification of the second adaptation layer entity of the first terminal device, the second A sub-information element is used to indicate the first corresponding relationship.
  • the first sub-cell may be a predefined cell or a fixed cell, which is not limited here.
  • the first sub-information element may be the dst-mappingInfo information element in the DST-MappingInfoList information element, or an information element with similar definition or function, or an information element with an extended field, which is not limited here.
  • the second sub-information element may include one or more of the following: an identifier of a radio bearer, an identifier of a second terminal device, and an identifier of a second RLC bearer, and the second sub-information element is used to indicate the second correspondence.
  • the second sub-cell may be a predefined cell or a fixed cell, which is not limited here.
  • the second sub-information element may be a MappingInfo information element in a Bearer-MappingInfoList information element, or an information element with a similar definition or function, or an information element with an extended field, which is not limited here.
  • the second sub-information element may also include the first RLC
  • the identifier of the bearer, the second sub-information element is also used to indicate the correspondence between the identifier of the radio bearer, the identifier of the second terminal device, and the identifier of the first RLC bearer.
  • the first sub-information element includes one or more of the following: the identification information of the unicast connection on the sidelink and the identification of the terminal equipment
  • the specific example of the first information element can refer to FIG. 5A and FIG. 5B
  • the first cell in will not be described here.
  • the first sub-information element includes one or more of the following: the identifier of the second adaptation layer entity of the first terminal device, and the identifier of the terminal device
  • the first information element may be:
  • the Bearer-MappingInfoList information element may include the second corresponding relationship, and the access network device may configure a maxNrofRemoteUEs group corresponding relationship at most, and maxNrofbearers is the maximum number of bearers corresponding to the terminal equipment that the first terminal equipment can relay.
  • the DST-MappingInfoList information element may include the first corresponding relationship, and the access network device may configure a maxNrofRemoteUEs group corresponding relationship at most, where maxNrofRemoteUEs is the number of terminal devices that can be connected to the first terminal device.
  • DRB-ID is the identifier of the radio bearer
  • Remote-UE-ID is the identifier of the second terminal device
  • PC5-RLC-bearer-id is the identifier of the second RLC bearer
  • Uu-RLC-bearer-id is the identifier of the second RLC bearer.
  • An identifier of the RLC bearer, and the PC5-Adapt-ID is the identifier of the second adaptation layer entity of the first terminal device.
  • the configuration information of the Uu adaptation layer of the first terminal device and the configuration information of the PC5 adaptation layer of the first terminal device are included in different information elements
  • the configuration information of the Uu adaptation layer of the first terminal device The information is included in the second information element
  • the configuration information of the PC5 adaptation layer of the first terminal equipment is included in the third information element.
  • the second information element may be a predefined information element or a fixed information element, which is not limited here.
  • the second information element may be a Uu-Adapt-Config information element, or an information element with a similar definition or function, or an information element with an extended field, which is not limited here.
  • the third information element may be a predefined information element or a fixed information element, which is not limited here.
  • the third information element may be a PC5-Adapt-Config information element, or an information element with a similar definition or function, or an information element with an extended field, which is not limited here.
  • the second information element may include the first sub-information element. It can be understood that, for downlink data transmission, the access network device may configure the first correspondence in the second information element.
  • the third information element may include a second sub-information element. It can be understood that, for downlink data transmission, the access network device may configure the second corresponding relationship in the third information element.
  • the second information element may be:
  • the second information element may be:
  • the first terminal device receives the first configuration information from the access network device, so that the first terminal device can correctly submit data between different protocol layer entities according to the first configuration information, which improves data transmission. reliability.
  • multiple PC5 adaptation layer entities are configured on the first terminal device, and one PC5 adaptation layer entity among the multiple PC5 adaptation layer entities is a PC5 RLC corresponding to a remote terminal device.
  • the adaptation layer entity used by the bearer how to correctly submit the uplink data.
  • the first adaptation layer entity of the first terminal device submits the first data and the first indication information to the second adaptation layer entity of the first terminal device.
  • the second adaptation layer entity of the first terminal device receives the first data and the first indication information from the first adaptation layer entity of the first terminal device.
  • the first indication information is used to indicate a radio bearer
  • the radio bearer may include a DRB and/or an SRB, which is not limited here.
  • the first adaptation layer entity of the first terminal device is a PC5 adaptation layer entity
  • the second adaptation layer entity of the first terminal device is a Uu adaptation layer entity
  • the first adaptation layer entity of the first terminal device is an adaptation layer entity used by a PC5 RLC bearer corresponding to a terminal device. It can be understood that the PC5 RLC bearer corresponding to one terminal device may be at least one PC5 RLC bearer.
  • the first adaptation layer entity of the first terminal device and the second adaptation layer entity of the first terminal device are two independent adaptation layer entities, or the same adaptation layer entity entity, without limitation. It can be understood that if the first adaptation layer entity of the first terminal device and the second adaptation layer entity of the first terminal device are two independent adaptation layer entities, this solution adopts steps 801 to 802 to implement; if the second The first adaptation layer entity of a terminal device and the second adaptation layer entity of the first terminal device are the same adaptation layer entity, and step 802 is implemented in this solution.
  • the embodiments shown in FIG. 8A and FIG. 8B may further include: the first adaptation layer entity of the first terminal device receives third data from the second RLC bearer, and the third data includes an identifier of the radio bearer, that is, the radio bearer
  • the identifier of the third data is included in the header of the third data, or the third data includes the identifier of the radio bearer and the identifier of the second terminal device, that is, the identifier of the radio bearer and the identifier of the second terminal device are included in the header of the third data.
  • the first adaptation layer entity of the first terminal device receives the third data from the RLC layer entity included in the second RLC bearer.
  • the second RLC bearer is the RLC bearer used when the first terminal device communicates with the second terminal device, that is, the second RLC bearer is the PC5 RLC bearer of the first terminal device used when the first terminal device communicates with the second terminal device. It can be understood that when the first adaptation layer entity of the first terminal device and the second adaptation layer entity of the first terminal device are two independent adaptation layer entities, the first adaptation layer entity of the first terminal device The layer entity receives the third data from the second RLC bearer before step 801; in the case that the first adaptation layer entity of the first terminal device and the second adaptation layer entity of the first terminal device are the same adaptation layer entity The step 802 is performed before the first adaptation layer entity of the first terminal device receives the third data from the second RLC bearer.
  • the first adaptation layer entity of the first terminal device submits the first data and the first indication information to the second adaptation layer entity of the first terminal device, which may be implemented in any of the following ways, which are not limited here .
  • the first adaptation layer entity of the first terminal device generates fourth data
  • the fourth data includes the first data, the radio bearer identifier and the first data.
  • the identification of the second terminal device; the first adaptation layer entity of the first terminal device submits the fourth data to the second adaptation layer entity of the first terminal device.
  • the fourth data is a PDU
  • the first data is an SDU
  • the identifier of the radio bearer and the identifier of the second terminal device are included in the header of the fourth data, that is, the first adaptation layer entity of the first terminal device reconstructs the third data.
  • the first adaptation layer entity of the first terminal device submits the third data and the identifier of the second terminal device to the first Two adaptation layer entities.
  • the third data is PDU
  • the first data is SDU, that is, the first adaptation layer entity of the first terminal device does not process the third data, so it is avoided that the first adaptation layer entity of the first terminal device changes the packet header Structure.
  • the radio bearer identifier and the second terminal device identifier are not included in the header of the first data, and the first data is an SDU. That is, the first adaptation layer entity of the first terminal device removes the packet header of the third data, and additionally indicates the identifier of the radio bearer and the identifier of the second terminal device, so overhead can be reduced and uplink data delivery efficiency can be improved.
  • Method 1.4 In the case where the third data includes the radio bearer identifier, the identifier of the second terminal device, and the first data, the first adaptation layer entity of the first terminal device submits the third data to the second terminal device of the first terminal device.
  • Two adaptation layer entities Wherein, the third data is PDU, and the first data is SDU, that is, the first adaptation layer entity of the first terminal device does not process the third data, so it is avoided that the first adaptation layer entity of the first terminal device changes the packet header Structure.
  • the first adaptation layer entity of the first terminal device may also submit the identity of the second terminal device to the second adaptation layer entity of the first terminal device, therefore, the first terminal device
  • the first adaptation layer entity of the device may determine the identifier of the second terminal device according to the second indication information and the second correspondence relationship, thereby implementing conversion between the second indication information and the identifier of the second terminal device.
  • the second indication information includes one or more of the following: the identity of the first adaptation layer entity, and the identity information of the unicast connection on the sidelink, where the sidelink is the connection between the first terminal device and the second terminal Sidelinks between devices.
  • the second correspondence includes one or more of the following:
  • the second adaptation layer entity of the first terminal device submits the first data to the first RLC bearer according to the first indication information.
  • the first RLC bearer acquires the first data from the second adaptation layer entity of the first terminal device.
  • step 802 may include: the second adaptation layer entity of the first terminal device submits the first data to the first RLC bearer according to the identifier of the radio bearer, the identifier of the second terminal device, and the first correspondence, so that This enables the second adaptation layer entity of the first terminal device to submit data correctly, improving the reliability of uplink data transmission.
  • the first correspondence includes a correspondence between the identifier of the radio bearer, the identifier of the second terminal device, and the identifier of the first RLC bearer.
  • Fig. 8A in the case where the first adaptation layer entity of the first terminal device does not submit the identity of the second terminal device to the second adaptation layer entity of the first terminal device, Fig. 8A
  • the embodiment shown in FIG. 8B also includes: the second adaptation layer entity of the first terminal device determines the identity of the second terminal device according to the third indication information and the third corresponding relationship, thereby realizing the third indication information and the second Conversion of the identity of the end device.
  • the second adaptation layer entity of the first terminal device may determine the identity of the second terminal device according to the third indication information and the third corresponding relationship, and the second adaptation layer entity of the first terminal device may determine the identity of the second terminal device according to the radio bearer
  • the identifier, the identifier of the second terminal device and the first correspondence are performed before the first data is delivered to the first RLC bearer.
  • the third indication information includes one or more of the following: the identity of the second adaptation layer entity, and the identity information of the unicast connection on the sidelink, where the sidelink is the link between the first terminal device and the second terminal device. The sidelink between them corresponds to the first adaptation layer entity.
  • the third correspondence includes one or more of the following:
  • the embodiments shown in FIG. 8A and FIG. 8B further include: the second adaptation layer entity of the first terminal device generates second data; the second data includes the first data, the identifier of the radio bearer, and the The identity, or, the second data includes the first data and the identity of the radio bearer; the second adaptation layer entity of the first terminal device submits the first data according to the identity of the radio bearer, the identity of the second terminal device, and the first correspondence
  • the first RLC bearer including: the second adaptation layer entity of the first terminal device submits the second data to the first RLC bearer according to the identifier of the radio bearer, the identifier of the second terminal device, and the first correspondence, so that the first The second adaptation layer entity of the terminal device can submit data correctly, which improves the reliability of uplink data transmission.
  • the second data is a PDU
  • the identifier of the radio bearer and the identifier of the second terminal device are included in the header of the second data; for methods 1.1-1.3, the identifier of the radio bearer is included in the header of the second data middle.
  • the first adaptation layer entity of the first terminal device submits the first data and the first indication information to the second adaptation layer entity of the first terminal device, so that the first adaptation layer entity of the first terminal device
  • the second adaptation layer entity can correctly deliver the first data to the first RLC bearer according to the first indication information, which improves the reliability of uplink data transmission.
  • the embodiments shown in FIG. 8A and FIG. 8B may further include: the first terminal device receives second configuration information from the access network device, and correspondingly, the access network device sends the second configuration information to the first terminal device.
  • the second configuration information includes one or more of the following: a first correspondence, a second correspondence, and a third correspondence.
  • the second configuration information is used to indicate one or more of the following: the first correspondence is the configuration information of the second adaptation layer of the first terminal device; the second correspondence is the configuration of the first adaptation layer of the first terminal device information; the third correspondence is configuration information of the second adaptation layer of the first terminal device.
  • the second configuration information may be included in RRC signaling or other signaling, which is not limited here. It can be understood that the second configuration information may be sent by the access network device to the first terminal device when the access network device receives a configuration information request message from the first terminal device, or the second configuration information may be sent by the access network device It is sent to the first terminal device, which is not limited here.
  • the configuration information request message may be used to instruct the access network device to send the second configuration information.
  • the second configuration information when the first adaptation layer entity of the first terminal device submits the identifier of the second terminal device to the second adaptation layer entity of the first terminal device, the second configuration information includes the first correspondence and The second correspondence, the second configuration information is used to indicate one or more of the following: the first correspondence is the configuration information of the second adaptation layer of the first terminal device; the second correspondence is the first Configuration information of the adaptation layer.
  • the second configuration information includes the first correspondence and the third correspondence
  • the second configuration information is used to indicate one or more of the following: the first correspondence is the configuration information of the second adaptation layer of the first terminal device; the third correspondence is the second adaptation layer of the first terminal device configuration information.
  • the configuration information of the first adaptation layer of the first terminal device and the configuration information of the second adaptation layer of the first terminal device may be contained in the same information element or in different information elements, that is, the configuration information of the first terminal device
  • the configuration information of the Uu adaptation layer and the configuration information of the PC5 adaptation layer of the first terminal device may be included in the same information element or in different information elements, which is not limited here.
  • the configuration information of the Uu adaptation layer of the first terminal device and the configuration information of the PC5 adaptation layer of the first terminal device are contained in the same information element
  • the configuration information of the Uu adaptation layer of the first terminal device may be included in the first information element.
  • the first cell may be a predefined cell or a fixed cell, which is not limited here.
  • the first information element may be an Adapt-Config information element, or an information element with a similar definition or function, or an information element with an extended field, which is not limited here.
  • the first information element may include the first sub-information element and the second sub-cell.
  • the first sub-information element may include one or more of the following: an identifier of a radio bearer, an identifier of a second terminal device, and an identifier of a first RLC bearer, and the first sub-information element is used to indicate the first correspondence.
  • the first sub-cell may be a predefined cell or a fixed cell, which is not limited here.
  • the first sub-information element may be a MappingInfo information element in a Bearer-MappingInfoList information element, or an information element with a similar definition or function, or an information element with an extended field, which is not limited here.
  • the second sub-information element may include one or more of the following: the identifier of the first adaptation layer entity of the first terminal device, the identifier of the second terminal device, the identifier information of the unicast connection on the sidelink, the second sub-information element The information element is used to indicate the second correspondence.
  • the second sub-cell may be a predefined cell or a fixed cell, which is not limited here.
  • the second sub-information element may be a dst-mappingInfo information element in the DST-MappingInfoList information element, or an information element with a similar definition or function, or an information element with an extended field, which is not limited here.
  • the first information element may include the first cell and the third sub-cell.
  • the third sub-information element may include one or more of the following: the identifier of the second adaptation layer entity of the first terminal device, the identifier of the second terminal device, the identifier information of the unicast connection on the side link, the first The three sub-information elements are used to indicate the third corresponding relationship.
  • the third sub-cell may be a predefined cell or a fixed cell, which is not limited here.
  • the second sub-cell may be the same cell or a different cell from the third sub-cell, which is not limited here.
  • the first sub-information element may also include the second RLC
  • the first sub-information element is also used to indicate the correspondence between the identifier of the radio bearer, the identifier of the second terminal device, and the identifier of the second RLC bearer.
  • the configuration information of the Uu adaptation layer of the first terminal device and the configuration information of the PC5 adaptation layer of the first terminal device are included in different information elements
  • the configuration information of the Uu adaptation layer of the first terminal device may be included in the second information element
  • the configuration information of the PC5 adaptation layer of the first terminal device may be included in the third information element.
  • the second information element may be a predefined information element or a fixed information element, which is not limited here.
  • the second information element may be a Uu-Adapt-Config information element, or an information element with a similar definition or function, or an information element with an extended field, which is not limited here.
  • the third information element may be a predefined information element or a fixed information element, which is not limited here.
  • the third information element may be a PC5-Adapt-Config information element, or an information element with a similar definition or function, or an information element with an extended field, which is not limited here.
  • the second information element may include the second sub-information element
  • the third information element may include the first sub-information element
  • the third information element may include the first cell and the third sub-cell.
  • the first terminal device The configuration information received from the access network device includes the first configuration information involved in the embodiment shown in Figure 7A and Figure 7B and the first configuration information involved in the embodiment shown in Figure 8A and Figure 8B, that is, the access network device can set the The configuration information involved in the downlink data transmission and the configuration information involved in the uplink data transmission are delivered to the first terminal device at the same time.
  • the configuration information of the Uu adaptation layer of the first terminal device and the configuration information of the PC5 adaptation layer of the first terminal device may be included in the same information element or in different information elements. Do limit.
  • the configuration information of the Uu adaptation layer of the first terminal device and the configuration information of the PC5 adaptation layer of the first terminal device are contained in the same information element, the first The configuration information of the Uu adaptation layer of the terminal device and the configuration information of the PC5 adaptation layer of the first terminal device, as well as the configuration information and The configuration information of the PC5 adaptation layer of the first terminal device is all included in the same information element.
  • the first terminal device involved in the embodiment shown in Fig. 7A and Fig. 7B The configuration information of the Uu adaptation layer, and the configuration information of the Uu adaptation layer of the first terminal device involved in the embodiment shown in Figure 8A and Figure 8B are all included in the same information element; the embodiment shown in Figure 7A and Figure 7B
  • the configuration information of the PC5 adaptation layer of the first terminal device involved, and the configuration information of the PC5 adaptation layer of the first terminal device involved in the embodiment shown in FIG. 8A and FIG. 8B are both included in the same information element.
  • the first terminal device receives the second configuration information from the access network device, so that the first terminal device can correctly submit data between different protocol layer entities according to the second configuration information, which improves data transmission. reliability.
  • FIG. 9 is a schematic flowchart of another data transmission method provided by the embodiment of the present application. As shown in Figure 9, the method includes but is not limited to the following steps:
  • the adaptation layer entity of the second terminal device receives second data from the RLC bearer of the second terminal device, where the second data includes second indication information.
  • the RLC bearer of the second terminal device submits the second data to the adaptation layer entity of the second terminal device.
  • the adaptation layer entity of the second terminal device may receive data from at least one RLC bearer and/or receive data from at least one PDCP layer entity, which is not limited here.
  • the RLC bearer of the second terminal device in step 901 may be one RLC bearer in at least one RLC bearer.
  • the RLC bearer of the second terminal device is a PC5 RLC bearer of the second terminal device.
  • the second indication information is used to indicate a radio bearer corresponding to the second terminal device receiving the second data.
  • the second indication information is the identifier of the radio bearer, or, the second indication information includes the identifier of the radio bearer and the identifier of the second terminal device.
  • step 901 may be replaced by: the adaptation layer entity of the second terminal device receives the second data from the RLC layer entity of the second terminal device, and correspondingly, the RLC layer entity of the second terminal device sends the second data to the second terminal device The adaptation layer entity submits the second data.
  • the adaptation layer entity of the second terminal device delivers the second data to the PDCP layer entity of the second terminal device according to the second indication information.
  • the PDCP layer entity of the second terminal device receives the second data from the adaptation layer entity of the second terminal device.
  • step 902 may include: the adaptation layer entity of the second terminal device submits the second data to the second terminal device according to the radio bearer identifier and the first correspondence
  • the PDCP layer entity enables the adaptation layer entity of the second terminal device to correctly submit downlink data, thereby improving the reliability of downlink data transmission. That is, in the case where the second indication information includes the radio bearer identifier, or in the case that the second indication information includes the radio bearer identifier and the identifier of the second terminal device, the adaptation layer entity of the second terminal device may according to The identifier of the radio bearer and the first corresponding relationship deliver the second data to the PDCP layer entity of the second terminal device.
  • the first correspondence includes a correspondence between the identifier of the radio bearer and the identifier of the PDCP layer entity of the second terminal device.
  • the adaptation layer entity of the second terminal device receives the second data from the RLC bearer of the second terminal device, so that the adaptation layer entity of the second terminal device can send the first The data is correctly submitted to the PDCP layer entity of the second terminal device, which improves the reliability of downlink data transmission.
  • the embodiment shown in FIG. 9 may further include: the second terminal device receives the first configuration information from the access network device, and correspondingly, the access network device sends the first configuration information to the second terminal device.
  • the first configuration information includes the following items: the first correspondence and the second correspondence; the first configuration information is used to indicate that the first correspondence and/or the second correspondence is the configuration of the adaptation layer of the second terminal device information.
  • the first configuration information includes the first correspondence, and the first configuration information is used to indicate that the first correspondence is the configuration of the adaptation layer of the second terminal device information; in the case where the second indication information is the identity of the radio bearer and the identity of the second terminal device, the first configuration information includes a second correspondence, and the first configuration information is used to indicate that the second correspondence is the identity of the second terminal equipment Configuration information of the adaptation layer.
  • the first configuration information may be included in RRC signaling or other signaling, which is not limited here. It can be understood that the first configuration information may be sent by the access network device to the second terminal device when the access network device receives a configuration information request message from the second terminal device or the third terminal device, or the first configuration information may be sent by The access network device sends to the first terminal device spontaneously, which is not limited here.
  • the configuration information request message may be used to instruct the access network device to send the first configuration information.
  • the second terminal device receiving the first configuration information from the access network device may include: the second terminal device receiving the first configuration information from the first terminal device, and the first terminal device receiving the first configuration information from the access network device information.
  • the second terminal device receives the first configuration information from the access network device, so that the first terminal device can correctly submit data between different protocol layer entities according to the first configuration information, which improves data transmission. reliability.
  • FIG. 10 is a schematic flowchart of another data transmission method provided by the embodiment of the present application. As shown in Figure 10, the method includes but is not limited to the following steps:
  • the adaptation layer entity of the second terminal device generates second data; the second data includes first data and second indication information, and the first data is obtained from the PDCP layer of the second terminal device by the adaptation layer entity of the second terminal device The data received by the entity.
  • the second indication information is used to indicate a radio bearer, or the second indication information is used to indicate a radio bearer corresponding to the second terminal device receiving the second data.
  • the second indication information is an identifier of the radio bearer.
  • the second indication information includes an identifier of the radio bearer and an identifier of the second terminal device. The identifier of the second terminal device may be received by the second terminal device from the access network device.
  • the first terminal device before the second terminal device establishes the RRC connection, the first terminal device requests the access network device to allocate the second terminal device through an RRC message, such as a (SidelinkUEInformationNR, SUI) message. logo.
  • RRC message such as a (SidelinkUEInformationNR, SUI) message. logo.
  • the assigned identity of the second terminal device is sent to the first terminal device through an RRC message, and the first terminal device informs the second terminal device of the identity of the second terminal device through the SL.
  • the identifier of the second terminal device may be sent to the second terminal device through a sidelink RRC message or a PC5 signaling or a MAC CE message.
  • the access network device may receive the RRC setup request (RRCsetupRequest) message sent by the second terminal device, that is, after the second terminal device initiates RRC connection establishment, it carries the identity of the second terminal device In the reply RRC Setup (RRCSetup) message.
  • RRC setupRequest RRC setup request
  • RRCSetup RRC Setup
  • the adaptation layer entity of the second terminal device delivers the second data to the RLC bearer of the second terminal device according to the second indication information.
  • the RLC bearer of the second terminal device obtains the second data from the adaptation layer entity of the second terminal device.
  • the adaptation layer entity of the second terminal device may receive data from at least one RLC bearer and/or receive data from at least one PDCP layer entity, which is not limited here.
  • the RLC bearer of the second terminal device in step 1002 may be one RLC bearer in at least one RLC bearer.
  • the RLC bearer of the second terminal device is a PC5 RLC bearer of the second terminal device.
  • step 1002 may include: the adaptation layer entity of the second terminal device submits the second data to the second terminal device according to the identifier of the radio bearer and the first corresponding relationship
  • the RLC bearer enables the adaptation layer entity of the second terminal device to correctly submit uplink data, improving the reliability of uplink data transmission.
  • the first correspondence includes the correspondence between the identifier of the radio bearer and the identifier of the RLC bearer of the second terminal device.
  • step 1002 may include: the adaptation layer entity of the second terminal device The first corresponding relationship submits the second data to the RLC bearer of the second terminal device, so that the adaptation layer entity of the second terminal device can correctly submit the uplink data, and improves the reliability of uplink data transmission.
  • the adaptation layer entity of the second terminal device generates the second data, and the second data includes the first data and the second indication information, so that the adaptation layer entity of the second terminal device can generate the second data according to the second
  • the indication information correctly delivers the second data to the RLC bearer of the second terminal device, which improves the reliability of uplink data transmission.
  • the embodiment shown in FIG. 10 may further include: the second terminal device receives the first configuration information from the access network device, and correspondingly, the access network device sends the first configuration information to the second terminal device.
  • the first configuration information includes the following item: a first correspondence and a second correspondence, and the first configuration information is used to indicate that the first correspondence or the second correspondence is configuration information of an adaptation layer of the second terminal device.
  • the first configuration information includes the first correspondence, and the first configuration information is used to indicate that the first correspondence is the configuration of the adaptation layer of the second terminal device information; in the case where the second indication information is the identity of the radio bearer and the identity of the second terminal device, the first configuration information includes a second correspondence, and the first configuration information is used to indicate that the second correspondence is the identity of the second terminal equipment Configuration information of the adaptation layer.
  • the first configuration information may be included in RRC signaling or other signaling, which is not limited here. It can be understood that the first configuration information may be sent by the access network device to the second terminal device when the access network device receives a configuration information request message from the second terminal device or the third terminal device, or the first configuration information may be sent by The access network device sends to the first terminal device spontaneously, which is not limited here.
  • the configuration information request message may be used to instruct the access network device to send the first configuration information.
  • the second terminal device receiving the first configuration information from the access network device may include: the second terminal device receiving the first configuration information from the first terminal device, and the first terminal device receiving the first configuration information from the access network device information.
  • the configuration information received by the second terminal device from the access network device includes the first configuration information involved in the embodiment shown in FIG. 9 and the first configuration information involved in the embodiment shown in FIG. 10 , That is, the access network device can deliver the configuration information involved in the downlink data transmission and the configuration information involved in the uplink data transmission to the second terminal device at the same time.
  • the second terminal device receives the first configuration information from the access network device, so that the first terminal device can correctly submit data between different protocol layer entities according to the first configuration information, which improves data transmission. reliability.
  • FIG. 11 is a schematic flowchart of another data transmission method provided by the embodiment of the present application. As shown in Figure 11, the method includes but is not limited to the following steps:
  • the adaptation layer entity of the access network device generates second data; the second data includes first data and second indication information, and the first data is obtained from the PDCP layer of the access network device by the adaptation layer entity of the access network device The data received by the entity.
  • the second indication information is used to indicate a radio bearer corresponding to the second terminal device receiving the second data, and the second indication information includes an identifier of the radio bearer and an identifier of the second terminal device.
  • the PDCP layer entity of the access network device is used to transmit data corresponding to the second terminal device.
  • the adaptation layer entity of the access network device submits the second data to the RLC bearer of the access network device according to the second indication information.
  • the RLC bearer of the access network device obtains the second data from the adaptation layer entity of the access network device.
  • the RLC bearer of the access network device is the RLC bearer used when the access network device communicates with the first terminal device, that is, the RLC bearer of the access network device is the Uu RLC used when the access network device communicates with the first terminal device bearer.
  • the adaptation layer entity of the access network device may receive data from at least one RLC bearer and/or receive data from at least one PDCP layer entity, which is not limited here. It can be understood that the RLC bearer of the access network device in step 1102 may be one RLC bearer in at least one RLC bearer.
  • step 1102 may include: the adaptation layer entity of the access network device submits the second data to the RLC bearer of the access network device according to the identifier of the radio bearer, the identifier of the second terminal device, and the first correspondence,
  • the adaptation layer entity of the access network terminal equipment can correctly submit downlink data, and the reliability of downlink data transmission is improved.
  • the first correspondence includes the correspondence between the identifier of the radio bearer, the identifier of the second terminal device, and the RLC bearer of the access network device.
  • the adaptation layer entity of the access network device generates the second data, and the second data includes the first data and the second indication information, so that the adaptation layer entity of the access network device can The indication information correctly submits the second data to the RLC bearer of the access network device, which improves the reliability of downlink data transmission.
  • FIG. 12 is a schematic flowchart of another data transmission method provided by the embodiment of the present application. As shown in Figure 12, the method includes but is not limited to the following steps:
  • the adaptation layer entity of the access network device receives second data from the RLC bearer of the access network device, where the second data includes second indication information.
  • the RLC bearer of the access network device submits the second data to the adaptation layer entity of the access network device.
  • the RLC bearer of the access network device is the RLC bearer used when the access network device communicates with the first terminal device, that is, the RLC bearer of the access network device is the Uu RLC used when the access network device communicates with the first terminal device bearer.
  • the second indication information is used to indicate a radio bearer corresponding to the second terminal device receiving the second data, and the second indication information includes an identifier of the radio bearer and an identifier of the second terminal device.
  • the adaptation layer entity of the access network device submits the second data to the PDCP layer entity of the access network device according to the second indication information.
  • the PDCP layer entity of the access network device receives the second data from the adaptation layer entity of the access network device.
  • the PDCP layer entity of the access network device is used to transmit data corresponding to the second terminal device.
  • step 1202 may include: the adaptation layer entity of the access network device submits the second data to the PDCP layer entity of the access network device according to the identifier of the radio bearer, the identifier of the second terminal device, and the first correspondence , so that the adaptation layer entity of the access network device can correctly submit uplink data, improving the reliability of uplink data transmission.
  • the first correspondence includes the correspondence between the identifier of the radio bearer, the identifier of the second terminal device, and the PDCP layer entity of the access network device.
  • the adaptation layer entity of the access network device receives the second data from the RLC bearer of the access network device, so that the adaptation layer entity of the access network device can transmit the first data according to the second indication information.
  • the data is correctly submitted to the PDCP layer entity of the access network device, which improves the reliability of uplink data transmission.
  • FIG. 13A only one PC5 adaptation layer entity is configured for the first terminal device, and the PC5 adaptation layer entity is an adaptation layer entity shared by at least one PC5 RLC bearer corresponding to the remote terminal device;
  • FIG. 13B multiple PC5 adaptation layer entities are configured on the first terminal device, and one PC5 adaptation layer entity among the multiple PC5 adaptation layer entities is an adaptation layer entity used by a PC5 RLC bearer corresponding to a remote terminal device .
  • the adaptation layer entity of the access network device receives the first data from the high-level protocol layer entity corresponding to the second terminal device, that is, the adaptation layer of the access network device
  • the entity receives the first data from the PDCP layer entity of the access network device, and the PDCP layer entity of the access network device is used to transmit data corresponding to the second terminal device; then, the actions performed by the adaptation layer entity of the access network device can be Refer to step 1101-step 1102 in Figure 11; then, the first terminal device receives the second data from the access network device through the first RLC bearer; then, for Figure 13A, the actions performed by the first terminal device can refer to Figure 13A Step 501-Step 502 of 5A, with regard to Figure 13B, the actions performed by the first terminal device can refer to Step 701-Step 702 in Figure 7A, which will not be repeated here; further, the second terminal device passes the second terminal device The RLC bearer receives the second data from the first terminal
  • the adaptation layer entity of the second terminal device when the second data received by the second terminal device from the first terminal device through the RLC bearer of the second terminal device includes the identifier of the radio bearer, the adaptation layer entity of the second terminal device according to the identifier of the radio bearer and the first A corresponding relationship submits the second data to the PDCP layer entity of the second terminal device, and the first corresponding relationship includes a corresponding relationship between the identifier of the radio bearer and the identifier of the PDCP layer entity of the second terminal device;
  • the adaptation layer entity of the second terminal device Submit the second data to the PDCP layer entity of the second terminal device, and the second correspondence relationship includes the identifier of the radio bearer, the identifier of the second terminal device, and the identifier of the PDCP layer entity of the second terminal device Correspondence between.
  • the adaptation layer entity of the second terminal device receives the first data from the PDCP layer entity of the second terminal device; then, the adaptation layer entity of the second terminal device
  • the actions performed can refer to steps 1001-1002 in Figure 10; then, the first terminal device receives the second data from the second terminal device through the second RLC bearer; then, for Figure 13A, the first terminal device executes
  • the actions can refer to steps 601-602 in Figure 6A.
  • the actions performed by the first terminal device can refer to steps 801-802 in Figure 8A, which will not be repeated here; further, the access network device passes The RLC bearer of the access network device receives the second data from the first terminal device; then, for actions performed by the access network device, reference may be made to steps 1201 - 1202 in FIG. 12 .
  • the adaptation layer entity of the second terminal device when the second data generated by the adaptation layer entity of the second terminal device includes the identifier of the radio bearer, the adaptation layer entity of the second terminal device submits the second data according to the identifier of the radio bearer and the first corresponding relationship
  • the first correspondence includes the correspondence between the identifier of the radio bearer and the identifier of the RLC bearer of the second terminal device
  • the second data generated by the adaptation layer entity of the second terminal device includes When the identifier of the radio bearer and the identifier of the second terminal device are used, the adaptation layer entity of the second terminal device submits the second data to the second terminal device according to the identifier of the radio bearer, the identifier of the second terminal device and the second corresponding
  • the second correspondence includes a correspondence between the identifier of the radio bearer, the identifier of the second terminal device, and the identifier of the RLC bearer of the second terminal device.
  • the actions performed by the first terminal device can refer to the steps 501-502 in Figure 5A.
  • the actions performed by the first terminal device Actions can refer to steps 601 to 602 in Figure 6A; for the downlink data transmission scheme, the actions performed by the first terminal device refer to steps 701 to 702 in Figure 7A, for the uplink data transmission scheme, the actions performed by the first terminal device Reference may be made to steps 801 - 802 in FIG. 8A .
  • the process of transmitting downlink data from the access network device to other terminal devices through the first terminal device can refer to the process of transmitting downlink data from the access network device to the second terminal device through the first terminal device; from other terminal devices through the first terminal device
  • a process of transmitting uplink data from a terminal device to an access network device reference may be made to the process of transmitting uplink data from a second terminal device to an access network device through a first terminal device, and details are not described here.
  • this solution may also involve the distinction between the bearer of the second terminal device and the bearer of the first terminal device.
  • the radio bearer of the first terminal device refers to the radio bearer for communication between the first terminal device and the access network device, and bears the data interacted between the access network device and the first terminal device.
  • the radio bearer of the first terminal device refers to the radio bearer for communication between the first terminal device and the second terminal device, and bears data that is directly interacted between the first terminal device and the second terminal device through the sidelink.
  • the main function of the adaptation layer is to multiplex data on different radio bearers to one RLC bearer.
  • the above embodiment only considers the situation that radio bearers of different terminal devices are multiplexed on the RLC bearer.
  • the adaptation layer may also multiplex the radio bearer of the second terminal device and the radio bearer of the first terminal device onto one RLC bearer. In this case, the adaptation layer needs to distinguish the two during the routing process.
  • a possible implementation manner is that the access network device also allocates an identifier of the second terminal device for indicating to the first terminal device, and notifies the first terminal device.
  • the adaptation layer carries the allocation in the header of the adaptation layer PDU of the radio bearer data of the first terminal device
  • the identifier of the second terminal device may be directly given by the protocol.
  • Another possible implementation manner is to introduce indication information on the header of the adaptation layer PDU, which is used to indicate whether the data is the data of the second terminal device or the data of the first terminal device. For example, it may be 1-bit indication information, 0 indicates that the data is the data of the second terminal device, and 1 indicates that the data is the data of the first terminal device.
  • the adaptation layer of the first terminal device adds the identification or indication information of the second terminal device to the header of the adaptation layer PDU, and sends it to the access network device, and the access network device receives After receiving the data, the data is delivered to the upper-layer entity of the second terminal device or the upper-layer entity of the first terminal device according to the identification or indication information of the second terminal device carried on the adaptation layer PDU.
  • the adaptation layer of the access network device adds the identification or indication information of the second terminal device to the header of the adaptation layer PDU, and when the first terminal device receives the data, it The identification or indication information of the second terminal device submits the first terminal device's own data to the upper layer of the first terminal device or corresponds the second terminal device data to the PC5RLC bearer of the second terminal device.
  • the second terminal device When the data of the first terminal device and the data of the second terminal device are multiplexed on a PC5RLC bearer, if the second terminal device carries the identity of the second terminal device in the adaptation layer header during the uplink data transmission, it can The above-mentioned method is used to distinguish data; if the second terminal device does not perceive the identity of the second terminal device, the method of carrying indication information may be used.
  • Another possible way is to limit that the data of the first terminal device and the data of the second terminal device cannot be multiplexed on one RLC bearer.
  • the configuration of the network access device can know whether the data on different RLC bearers belong to the second terminal device or the first terminal device.
  • the radio bearer of the second terminal device includes two types of DRB and SRB.
  • a bearer between a terminal device and an access network device can include at most SRB1-SRB3 and 32 DRBs. Therefore, the access network device uses 2 bits to identify SRB1-3, corresponding to 1-3 , 5 bits are used to identify DRB1-DRB32, which correspond to the identifiers 1-32 respectively.
  • RB ID radio bearer ID
  • the adaptation layer will have no way to distinguish between SRB data and DRB data whose IDs are 1-3.
  • a possible implementation is to add 1-bit indication information to the adaptation layer header to indicate the bearer type, for example, when the indication information is 0, it corresponds to SRB data, and when the indication information is 1, it corresponds to DRB data.
  • the adaptation layer can uniquely determine which radio bearer the data belongs to.
  • the RB ID is in binary form of 5 bits. For example, if the adaptation layer PDU header contains indication information "0" and RB ID 2 information , which means that the adaptation layer PDU contains the data of SRB2.
  • the access network device remaps the SRB ID and the DRB ID so that the numbers of the two are not repeated, and notifies the first terminal device and the second terminal device of the ID information after the remapping, using It is used to add and identify RB ID information on the adaptation layer header.
  • the access network device configures the identifiers of SRB1-3 as 1-3, configures the identifiers of DRB1-32 as 4-35, and notifies the first terminal device and the second terminal device of the correspondence between SRB/DRB and identifiers. Terminal Equipment.
  • the RB ID can be up to 35, so a 6-bit space needs to be reserved on the PDU header of the adaptation layer to carry the RB ID information.
  • the above remapping relationship can be directly given by the protocol, that is, it is stipulated that the RB IDs of SRB1-3 correspond to 1-3, and the RB IDs of DRB1-32 correspond to 4-35; or,
  • Another possible implementation is to limit that SRB data and DRB data cannot be multiplexed on one RLC bearer.
  • the first terminal device and the second terminal device can know the data on different RLC bearers according to the configuration of the access network device Is it SRB data or DRB data.
  • each network element includes a corresponding hardware structure and/or software module for performing each function.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software in combination with the units and algorithm steps of each example described in the embodiments disclosed herein. Whether a certain function is executed by hardware or computer software drives hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.
  • the embodiment of the present application can divide the functional modules of the first terminal device, the second terminal device, the access network device, etc. according to the above method example, for example, each functional module can be divided corresponding to each function, or two or two
  • each functional module can be divided corresponding to each function, or two or two
  • the above functions are integrated into one processing module, and the above integrated module can be implemented in the form of hardware or in the form of software function modules.
  • the division of modules in the embodiment of the present application is schematic, and is only a logical function division, and there may be other division methods in actual implementation.
  • FIG. 14 is a schematic structural diagram of a communication device provided in an embodiment of the present application.
  • the communication device 1400 can be applied to the above methods shown in FIGS. 5A-12 , and as shown in FIG. 14 , the communication device 1400 includes: a processing module 1401 and a transceiver module 1402 .
  • the processing module 1401 may be one or more processors, and the transceiver module 1402 may be a transceiver or a communication interface.
  • the communication device may be used to realize the functions related to the first terminal device, the second terminal device, and the access network device in any of the above method embodiments, or to realize the functions related to the network elements in any of the above method embodiments.
  • the network element or network function may be a network element in a hardware device, or a software function running on dedicated hardware, or a virtualization function instantiated on a platform (for example, a cloud platform).
  • the communication device 1400 may further include a storage module 1403 for storing program codes and data of the communication device 1400 .
  • the transceiver module 1402 is used to support communication with the second terminal device or the access network device, etc., and the transceiver module 1402 is also used for communication between different protocol layer entities in the first terminal device, such as the transceiver module 1402 is used to pass the 5A-the actions of sending and/or receiving performed by the first adaptation layer entity of the first terminal device in FIG. 8B, specifically, the transceiver module 1402 is used to perform steps 501, One or more of step 601, step 701, step 801, and/or other processes for the techniques described herein.
  • the transceiver module 1402 is used for sending and/or receiving actions performed by the second adaptation layer entity of the first terminal device in FIG. 5A-8B, for example, the transceiver module 1402 is used for the The layering entity performs one or more of steps 502, 602, 702, 802, and/or other processes for the techniques described herein.
  • the processing module 1401 may be used to support the communication apparatus 1400 to execute the processing actions in the above method embodiments, for example, the processing module 1401 is used to use the first adaptation layer entity of the first terminal device or the second adaptation layer entity of the first terminal device to The processing actions described herein are performed.
  • the transceiver module 1402 is used to support communication with the first terminal device or the access network device, etc., and the transceiver module 1402 is also used for communication between different protocol layer entities in the second terminal device, such as the transceiver module 1402 is used to pass the 9-The actions of sending and/or receiving performed by the adaptation layer entity of the second terminal device in FIG. One or more steps in 1002, and/or other processes for the techniques described herein.
  • the processing module 1401 may be configured to support the communication apparatus 1400 to execute the processing actions in the foregoing method embodiments. For example, the processing module 1401 is configured to execute step 1001 in FIG. 10 through an adaptation layer entity of the second terminal device.
  • the transceiver module 1402 is used to support communication with the first terminal device, etc., and the transceiver module 1402 is also used for communication between different protocol layer entities in the access network device, such as the transceiver module 1402 is used to pass the The action of sending and/or receiving performed by the adaptation layer entity of the access network device, for example, supporting the adaptation layer entity of the access network device to perform one or more steps in step 1102, step 1201, and step 1202, and/or Other procedures for the techniques described herein.
  • the processing module 1401 may be configured to support the communications apparatus 1400 to execute the processing actions in the foregoing method embodiments. For example, the processing module 1401 is configured to execute step 1101 in FIG. 11 through an adaptation layer entity of the access network device.
  • the transceiver module 1402 may be an interface, a pin, or a circuit.
  • the interface can be used to input the data to be processed to the processor, and can output the processing result of the processor.
  • the interface can be a general purpose input output (GPIO) interface, which can communicate with multiple peripheral devices (such as display (LCD), camera (camara), radio frequency (radio frequency, RF) modules, antennas, etc. )connect.
  • the interface is connected with the processor through the bus.
  • the processing module 1401 may be a processor, and the processor may execute the computer-executed instructions stored in the storage module, so that the chip executes the methods involved in the embodiments of FIG. 5A to FIG. 12 .
  • the processor may include a controller, an arithmetic unit and registers.
  • the controller is mainly responsible for decoding instructions and sending control signals for operations corresponding to the instructions.
  • the arithmetic unit is mainly responsible for performing fixed-point or floating-point arithmetic operations, shift operations, and logic operations, and can also perform address operations and conversions.
  • the register is mainly responsible for saving the register operands and intermediate operation results temporarily stored during the execution of the instruction.
  • the hardware architecture of the processor can be application specific integrated circuits (ASIC) architecture, microprocessor without interlocked piped stages architecture (MIPS) architecture, advanced streamlined instructions Advanced RISC machines (ARM) architecture or network processor (network processor, NP) architecture, etc.
  • Processors can be single-core or multi-core.
  • the storage module may be a storage module in the chip, such as a register, a cache, and the like.
  • the storage module can also be a storage module located outside the chip, such as read-only memory (Read Only Memory, ROM) or other types of static storage devices that can store static information and instructions, random access memory (Random Access Memory, RAM), etc. .
  • processors and the interface can be realized through hardware design, software design, or a combination of software and hardware, which is not limited here.
  • FIG. 15 is a schematic structural diagram of a simplified terminal device provided by an embodiment of the present application.
  • the terminal device is a mobile phone as an example. It can be understood that the terminal device involved in FIG. 15 may be the first terminal device or the second terminal device, which is not limited here.
  • the terminal device includes at least one processor, and may also include a radio frequency circuit, an antenna, and an input and output device.
  • the processor can be used to process communication protocols and communication data, and can also be used to control terminal equipment, execute software programs, process data of software programs, and the like.
  • the terminal device may also include a memory, which is mainly used to store software programs and data.
  • the radio frequency circuit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal.
  • the antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves, and the antenna is the antenna provided in the embodiment of the present application.
  • Input and output devices such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal equipment may not have input and output devices.
  • the processor When data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.
  • FIG. 15 only one memory and processor are shown in FIG. 15 . In an actual terminal device product, there may be one or more processors and one or more memories.
  • a memory may also be called a storage medium or a storage device. The memory may be set independently of the processor, or may be integrated with the processor, which is not limited in this embodiment of the present application.
  • the antenna and radio frequency circuit with transceiver function can be regarded as the receiving unit and the transmitting unit of the terminal equipment (also collectively referred to as the transceiver unit), and the processor with processing function can be regarded as the processing unit of the terminal equipment .
  • the terminal device includes a receiving module 31 , a processing module 32 and a sending module 33 .
  • the receiving module 31 can also be called a receiver, a receiver, a receiving circuit, etc.
  • the sending module 33 can also be called a transmitter, a transmitter, a transmitter, a transmitting circuit, etc.
  • the processing module 32 may also be called a processor, a processing board, a processing device, and the like.
  • the processing module 32 is configured to execute the function of the first terminal device in any one of the embodiments shown in FIG. 5A-FIG. 8A.
  • FIG. 16 is a schematic structural diagram of a simplified access network device provided by an embodiment of the present application.
  • the access network equipment includes a radio frequency signal transceiving and converting part and a part 42, and the radio frequency signal transceiving and converting part further includes a receiving module 41 and a sending module 43 (also collectively referred to as a transceiver module).
  • the RF signal transceiver and conversion part is mainly used for the RF signal transceiver and the conversion of the RF signal and the baseband signal; the 42 part is mainly used for the baseband processing and controlling the access network equipment, etc.
  • the receiving module 41 can also be called a receiver, a receiver, a receiving circuit, etc.
  • the sending module 43 can also be called a transmitter, a transmitter, a transmitter, a transmitting circuit, etc.
  • the part 42 is usually the control center of the access network equipment, which can usually be called a processing module, and is used to control the access network equipment to execute the steps performed by the above-mentioned access network equipment in FIGS. 11-12 .
  • a processing module is used to control the access network equipment to execute the steps performed by the above-mentioned access network equipment in FIGS. 11-12 .
  • Part 42 may include one or more single boards, and each single board may include one or more processors and one or more memories, and the processors are used to read and execute programs in the memories to realize baseband processing functions and interface network device control. If there are multiple single boards, each single board can be interconnected to increase the processing capacity. As an optional implementation, it is also possible that multiple single boards share one or more processors, or that multiple single boards share one or more memories, or that multiple single boards share one or more processors at the same time. device.
  • the sending module 43 is configured to perform the function of the access network device in any one of the embodiments shown in FIG. 11-FIG. 12 .
  • the embodiment of the present application also provides a communication device, including a processor, a memory, an input interface and an output interface, the input interface is used to receive information from other communication devices other than the communication device, and the output interface is used to send information to other communication devices outside the communication device Other communication devices output information, and the processor invokes the computer program stored in the memory to implement any of the embodiments shown in FIGS. 5A-12 .
  • the embodiment of the present application also provides a computer-readable storage medium, in which a computer program is stored. When the computer program is run, any one of the embodiments shown in FIGS. 5A-12 is realized.
  • the embodiment of the present application also provides a computer program product, which enables the computer to implement any of the embodiments shown in FIGS. 5A-12 when the computer reads and executes the computer program product.
  • each network element unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated units can be implemented in the form of hardware or in the form of software network elements.
  • the above integrated units are realized in the form of software network elements and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of software products, and the computer software products are stored in a storage medium Among them, several instructions are included to make a computer device (which may be a personal computer, a cloud server, or a network device, etc.) execute all or part of the steps of the above-mentioned methods in various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disc, etc., which can store program codes. .
  • U disk mobile hard disk
  • read-only memory ROM, Read-Only Memory
  • RAM random access memory
  • magnetic disk or optical disc etc.
  • the above is only a specific embodiment of the application, but the scope of protection of the application is not limited thereto. Any person familiar with the technical field can easily think of various equivalents within the scope of the technology disclosed in the application. Modifications or replacements, these modifications or replacements shall be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

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  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente demande concerne un procédé de transmission de données et un appareil associé. Une première entité de couche d'adaptation d'un premier dispositif terminal peut transmettre des premières données et des premières informations d'indication à une seconde entité de couche d'adaptation du premier dispositif terminal de façon à ce que la seconde entité de couche d'adaptation du premier dispositif terminal puisse transmettre correctement les premières données à une seconde porteuse RLC en fonction des premières informations d'indication. Ainsi, la fiabilité de la transmission de données en liaison descendante est améliorée.
PCT/CN2022/122158 2021-10-20 2022-09-28 Procédé de transmission de données et appareil associé Ceased WO2023065999A1 (fr)

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