WO2021032008A1 - 通信方法和通知装置 - Google Patents

通信方法和通知装置 Download PDF

Info

Publication number
WO2021032008A1
WO2021032008A1 PCT/CN2020/109270 CN2020109270W WO2021032008A1 WO 2021032008 A1 WO2021032008 A1 WO 2021032008A1 CN 2020109270 W CN2020109270 W CN 2020109270W WO 2021032008 A1 WO2021032008 A1 WO 2021032008A1
Authority
WO
WIPO (PCT)
Prior art keywords
terminal device
configuration information
identifier
feedback resource
multicast communication
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2020/109270
Other languages
English (en)
French (fr)
Inventor
彭文杰
王君
魏冬冬
戴明增
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to EP20853793.6A priority Critical patent/EP4017042A4/en
Priority to EP23166372.5A priority patent/EP4236396A3/en
Publication of WO2021032008A1 publication Critical patent/WO2021032008A1/zh
Priority to US17/671,649 priority patent/US20220174458A1/en
Anticipated expiration legal-status Critical
Priority to US19/042,900 priority patent/US20250184700A1/en
Ceased legal-status Critical Current

Links

Images

Classifications

    • 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
    • H04L5/0037—Inter-user or inter-terminal allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1854—Scheduling and prioritising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/188—Time-out mechanisms
    • 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
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H04W4/08—User group management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/12—Messaging; Mailboxes; Announcements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices

Definitions

  • the present application relates to the field of communication, and more specifically, to a communication method and communication device.
  • New radio new radio
  • vehicle to everything supports multicast communication.
  • AS access stratum
  • APP application layer
  • AS access stratum
  • UE user equipment
  • HARQ hybrid automatic repeat request
  • each UE in the group needs to know the resource for HARQ feedback.
  • the unicast connection can only be triggered by the APP layer, and there is no AS-triggered unicast connection or multicast solution. Therefore, each UE in the group cannot learn the resources for performing HARQ.
  • the present application provides a communication method capable of transmitting AS configuration information through sidelink signaling based on packet-related information.
  • a passing method including: a first terminal device obtains a source identifier allocated by a second terminal device for multicast communication, and the multicast communication is a communication for a target packet, the first terminal device and the second terminal The device belongs to the target group; the V2X layer of the first terminal device generates the first side uplink signaling; the V2X layer sends the first side uplink signaling, the first identifier, and the group identifier to the AS of the first terminal device
  • the first identifier is the source identifier allocated by the first terminal device for the multicast communication, and the group identifier is used to identify the target group; the AS uses the first identifier as the source identifier and the group identifier as the destination identifier, and sends The first side uplink signaling.
  • the first side link signaling may include the source identifier allocated by the second terminal device for multicast communication and the access layer AS configuration information of the second terminal device.
  • the first terminal device can send side link signaling based on the source identifier allocated by it for multicast communication and the group identifier of the target packet, and transmit the second terminal device’s information through the side link signaling.
  • AS configuration information AS configuration information.
  • the first side link signaling may include the source identifier allocated for the multicast communication by each terminal device in the target packet and the access layer AS configuration information of each terminal device.
  • the AS configuration information of other terminal devices can be used.
  • the first side link signaling may include a source identification list, and the source identification list includes source identifications allocated by each terminal device in the target packet for multicast communication.
  • the positions of the first source identifier and the first source identifier in the source identifier list indicate the AS configuration information of the terminal device corresponding to the first source identifier, and the first source identifier is allocated by any terminal device in the target packet for multicast communication Source ID. That is to say, any source identifier in the source identifier list and the position of the source identifier in the source identifier list are used for the terminal device corresponding to the source identifier to determine its corresponding AS configuration information.
  • the AS configuration information of other terminal devices can be used.
  • the method before the V2X layer of the first terminal device generates the first side link signaling, the method further includes: the AS of the first terminal device sends the V2X layer to the V2X layer.
  • Sending configuration information, where the V2X layer of the first terminal device generates the first side uplink signaling includes: the V2X layer generates the first side uplink signaling according to the configuration information.
  • the configuration information includes the group identifier.
  • the configuration information may also include: the source identifier assigned by the second terminal device for multicast communication and the AS configuration information of the second terminal device, or the source identifier assigned by each terminal device in the target packet for multicast communication and the terminal device's Access layer AS configuration information, or source identification list.
  • the AS configuration information of the second terminal device includes the first AS configuration information, and the first AS configuration information is used by the second terminal device to determine the first feedback resource.
  • a feedback resource is used for the second terminal device to perform hybrid automatic repeat request HARQ feedback on the multicast communication initiated by the first terminal device.
  • the second terminal device can determine the resource for the hybrid automatic repeat request HARQ feedback for the multicast communication initiated by the first terminal device.
  • the first AS configuration information is also used by the second terminal device to determine at least one second feedback resource, and the at least one second feedback resource is in addition to the target group.
  • the terminal devices other than the two terminal devices have a one-to-one correspondence, and any second feedback resource is used by the second terminal device to perform HARQ feedback on the multicast communication initiated by the terminal device corresponding to the second feedback resource.
  • the second terminal device can determine the resource for the hybrid automatic repeat request HARQ feedback for the multicast communication initiated by any terminal device in the target packet.
  • the AS configuration information of the second terminal device further includes at least one second AS configuration information, the at least one second AS configuration information and the target group except for the second There is a one-to-one correspondence between terminal devices other than the terminal device, and the second AS configuration information corresponding to the third terminal device is used for the third terminal device to determine at least one third feedback resource, and the at least one third feedback resource corresponds to the target group except the Terminal devices other than the third terminal device have a one-to-one correspondence, and any third feedback resource is used by the third terminal device to perform HARQ feedback on the multicast communication initiated by the terminal device corresponding to the third feedback resource, and the third terminal device It is any terminal device other than the second terminal device in the target group.
  • the second terminal device can determine the resource for any terminal device in the target packet to request HARQ feedback for the hybrid automatic repeat request for the multicast communication initiated by other terminal devices.
  • the method may further include: the first terminal device receives the second side uplink signaling sent by the second terminal device, the second side uplink signaling Let include third AS configuration information, the third AS configuration information is used by the first terminal device to determine the fourth feedback resource, and the fourth feedback resource is used by the first terminal device to mix the multicast communication initiated by the second terminal device Automatic retransmission requests HARQ feedback.
  • the first terminal device can determine the resource for HARQ feedback to the multicast communication initiated by the second terminal device.
  • the third AS configuration information is also used for the first terminal device to determine resources for HARQ feedback for multicast communications initiated by other terminal devices in the target packet.
  • the method before the first terminal device obtains the source identifier assigned to the multicast communication by each terminal device in the target packet, the method further includes:
  • the first terminal device uses the first identifier as the source identifier and the default identifier corresponding to the target service type as the destination identifier, and broadcasts a group establishment request message, where the group establishment request message is used to request the establishment of the target group, and the group establishment request The message includes the group identifier and the information of the target group at the application layer;
  • the first terminal device receives the packet establishment acceptance message fed back by each terminal device except the first terminal device in the target packet, wherein the group establishment request acceptance message corresponding to any terminal device is sent with the terminal device as the multicast
  • the source identifier assigned by the communication is the source identifier
  • the group identifier is the destination identifier.
  • the target group can be established, and the first terminal device can obtain the source identifier assigned to the multicast communication by each terminal device in the target group.
  • a communication method including: a second terminal device receives the first side uplink signaling sent by the first terminal device.
  • the first side link signaling may include the source identifier allocated by the second terminal device for multicast communication and the access layer AS configuration information of the second terminal device.
  • the multicast communication is communication for a target packet, and the first terminal device and the second terminal device belong to the target packet.
  • the first terminal device can send side link signaling based on the source ID and the group ID of the target packet allocated by itself for multicast communication, and transmit the AS configuration of the second terminal device through the side link signaling. information.
  • the first side link signaling may include the source identifier allocated for the multicast communication by each terminal device in the target packet and the access layer AS configuration information of each terminal device.
  • the AS configuration information of other terminal devices can be used.
  • the first side uplink signaling may include a source identification list, and the source identification list includes source identifications allocated for multicast communication by each terminal device in the target packet.
  • the positions of the first source identifier and the first source identifier in the source identifier list indicate the AS configuration information of the terminal device corresponding to the first source identifier, and the first source identifier is allocated by any terminal device in the target packet for multicast communication Source ID. That is to say, any source identifier in the source identifier list and the position of the source identifier in the source identifier list are used for the terminal device corresponding to the source identifier to determine its corresponding AS configuration information.
  • the AS configuration information of other terminal devices can be used.
  • the second terminal device receiving the first side uplink signaling sent by the first terminal device includes: the V2X layer of the second terminal device receives the first side Uplink signaling;
  • the method further includes: the V2X layer sending the source identifier allocated by the second terminal device for multicast communication and the AS configuration information of the second terminal device to the access layer AS of the second terminal device.
  • the AS configuration information of the second terminal device includes the first AS configuration information; and the method further includes: the AS determines the first AS configuration information according to the first AS configuration information A feedback resource, where the first feedback resource is used by the second terminal device to perform hybrid automatic repeat request HARQ feedback on the multicast communication initiated by the first terminal device.
  • the AS determines at least one second feedback resource according to the first AS configuration information, and the at least one second feedback resource is grouped with the target except for the second terminal device There is a one-to-one correspondence with other terminal devices, and any second feedback resource is used by the second terminal device to perform HARQ feedback on the multicast communication initiated by the terminal device corresponding to the second feedback resource.
  • the AS configuration information of the second terminal device further includes at least one second AS configuration information; and, the method further includes: the AS according to the at least one second AS Configuration information to determine the feedback resource corresponding to any terminal device other than the second terminal device in the target group, where the feedback resource of the third terminal device includes at least one third feedback resource, and the at least one third feedback resource corresponds to the There is a one-to-one correspondence with the terminal devices in the target packet except the third terminal device, and any third feedback resource is used for the third terminal device to perform HARQ feedback on the multicast communication initiated by the terminal device corresponding to the third feedback resource,
  • the third terminal device is any terminal device other than the second terminal device in the target group.
  • the method further includes: the second terminal device sends second side link signaling to the first terminal device, where the second side link signaling includes Third AS configuration information;
  • the second terminal device determines a fourth feedback resource according to the third AS configuration information, and the fourth feedback resource is used by the first terminal device to perform hybrid automatic repeat request HARQ feedback on the multicast communication initiated by the second terminal device.
  • the first side uplink signaling further includes the information allocated by each terminal device except the second terminal device in the target packet for the multicast communication. Source identification and AS configuration information of each terminal device.
  • the method before the second terminal device receives the first side link signaling sent by the first terminal device, the method further includes: the second terminal device uses the One identifier is the source identifier, and the default identifier corresponding to the target service type is the destination identifier, and the group establishment request message broadcasted by the first terminal device is received, where the group establishment request message is used to request establishment of the target group, and the group establishment request message Including the group ID and the information of the target group at the application layer, the group ID is used to identify the target group; the second terminal device uses the second ID as the source ID and the group ID as the destination ID, and sends the group to the first terminal device An acceptance message is established, and the second identifier is a source identifier allocated by the second terminal device for the multicast communication.
  • a communication method including: a first terminal device acquires a first identifier and a second identifier, where the first identifier is a source identifier allocated by the first terminal device for multicast communication, and the second identifier is a first 2.
  • the multicast communication is a communication for a target packet.
  • the first terminal device and the second terminal device belong to the target packet; the first terminal device uses the first identifier as the source identifier ,
  • the second identifier is the destination identifier, and the first access layer AS configuration information is sent to the second terminal device.
  • the first terminal device may send AS configuration information to the second terminal device based on the source identifier allocated by the first terminal device for multicast communication and the source identifier allocated by the second terminal device for multicast communication, thereby To achieve the purpose of transmitting AS configuration information.
  • the first AS configuration information is used by the second terminal device to determine the first feedback resource
  • the first feedback resource is used by the second terminal device to initiate the first terminal device
  • the multicast communication performs hybrid automatic repeat request HARQ feedback.
  • the first AS configuration information is also used by the second terminal device to determine at least one second feedback resource, and the at least one second feedback resource is in addition to the target group.
  • the terminal devices other than the two terminal devices have a one-to-one correspondence, and any second feedback resource is used by the second terminal device to perform HARQ feedback on the multicast communication initiated by the terminal device corresponding to the second feedback resource.
  • the method further includes: the first terminal device sends at least one second AS configuration information to the second terminal device, wherein the at least one second AS configuration information and The terminal devices other than the second terminal device in the target group have a one-to-one correspondence, and the second AS configuration information corresponding to the third terminal device is used for the third terminal device to determine at least one third feedback resource, and the at least one third feedback resource There is a one-to-one correspondence with terminal devices other than the third terminal device in the target packet, and any third feedback resource is used by the third terminal device to perform HARQ on the multicast communication initiated by the terminal device corresponding to the third feedback resource Feedback is that the third terminal device is any terminal device in the target group except the second terminal device.
  • the method further includes: the first terminal device receives the third AS configuration information sent by the second terminal device.
  • the third AS configuration information is used by the first terminal device to determine a fourth feedback resource
  • the fourth feedback resource is used by the first terminal device to the second terminal device
  • the initiated multicast communication performs hybrid automatic repeat request HARQ feedback.
  • the method before the first terminal device obtains the first identifier and the second identifier, the method further includes:
  • the first terminal device uses the first identifier as the source identifier and the default identifier corresponding to the target service type as the destination identifier, and broadcasts a group establishment request message, where the target service type is the service type that initiates the establishment of the target group, and the group establishment
  • the request message is used to request the establishment of the target group
  • the group establishment request message includes the group identifier allocated by the first terminal device for the target group and the information of the target group at the application layer;
  • the first terminal device receives the group establishment accept message fed back by the second terminal device, where the group establishment request accept message is sent with the second identifier as the source identifier and the group identifier as the destination identifier.
  • the first terminal device can establish a target packet, and can obtain the source identifier assigned to the multicast communication by each terminal device in the target packet.
  • a communication method which includes: a second terminal device uses a first identifier as a source identifier and a second identifier as a destination identifier, and receives first access layer AS configuration information sent by the first terminal device, where , The first identifier is the source identifier assigned by the first terminal device for the multicast communication, the second identifier is the source identifier assigned by the second terminal device for the multicast communication, the multicast communication is communication for the target packet, A terminal device and a second terminal device belong to the target group.
  • the second terminal device may obtain AS configuration information based on the source identifiers allocated by the first terminal device and the second terminal device for multicast communication.
  • the second terminal device determines the first feedback resource according to the first AS configuration information, and the first feedback resource is used by the second terminal device to initiate the first terminal device
  • the multicast communication performs hybrid automatic repeat request HARQ feedback.
  • the method further includes: the second terminal device determines at least one second feedback resource according to the first AS configuration information, and the at least one second feedback resource is related to the target There is a one-to-one correspondence between terminal devices other than the second terminal device in the packet, and any second feedback resource is used by the second terminal device to perform HARQ feedback on the multicast communication initiated by the terminal device corresponding to the second feedback resource.
  • the method further includes: the second terminal device uses the first identifier as a source identifier and the second identifier as a destination identifier, and receives a message sent by the first terminal device. At least one second AS configuration information; the second terminal device determines the feedback resource corresponding to any terminal device in the target group except the second terminal device according to the second AS configuration information, wherein the feedback resource of the third terminal device It includes at least one third feedback resource, and the at least one third feedback resource has a one-to-one correspondence with the terminal devices in the target group except the third terminal device, and any third feedback resource is used by the third terminal device for the second 3.
  • the multicast communication initiated by the terminal device corresponding to the feedback resource performs HARQ feedback
  • the third terminal device is any terminal device other than the second terminal device in the target packet.
  • the method further includes: the second terminal device uses the second identifier as the source identifier and the first identifier as the destination identifier, and sends and receives to the first terminal device.
  • Third AS configuration information used to configure the second terminal device.
  • the third AS configuration information is used by the first terminal device to determine the fourth feedback resource
  • the fourth feedback resource is used by the first terminal device to the second terminal device
  • the initiated multicast communication performs hybrid automatic repeat request HARQ feedback.
  • the method before the second terminal device receives the first access stratum AS configuration information sent by the first terminal device, the method further includes: One identifier is the source identifier, and the default identifier corresponding to the target service type is the destination identifier, and the group establishment request message broadcasted by the first terminal device is received, where the target service type is the service type that initiates the establishment of the target group, and the group establishment request The message is used to request the establishment of the target group.
  • the group establishment request message includes the group ID and the information of the target group at the application layer. The group ID is used to identify the target group; the second terminal device uses the second ID as the source ID, which is The group identifier is a destination identifier, and a group establishment acceptance message is sent to the first terminal device.
  • a communication method including: a first terminal device obtains a second identifier, where the second identifier is a source identifier allocated by the second terminal device for multicast communication, and the multicast communication is a communication for a target packet ,
  • the target packet includes the first terminal device and the second terminal device;
  • the V2X layer of the first terminal device generates a unicast connection establishment request message, and the unicast connection establishment request message includes the second identifier;
  • the V2X layer sends a message to the first terminal
  • the access layer AS of the device sends the unicast connection establishment request message, the third identifier, and the default identifier corresponding to the target service type.
  • the third identifier is the unicast requested by the first terminal device for the unicast connection establishment request message.
  • the source identifier assigned to the connection, the target service type is the service type that initiates the establishment of the target group; the AS uses the third identifier as the source identifier and the default identifier corresponding to the target service type as the destination identifier, and broadcasts the unicast connection establishment Request message; the first terminal device receives the unicast connection establishment response message sent by the second terminal device.
  • the unicast connection establishment response message is sent with the fourth identifier as the source identifier, the third identifier as the destination identifier, and the fourth The identifier is the source identifier allocated by the second terminal device for the unicast connection.
  • the first terminal device and the second terminal device can establish a unicast connection based on information related to the target group, so that the purpose of transmitting AS configuration information can be realized based on the unicast connection.
  • the method before the V2X layer generates the unicast connection establishment request message, the method further includes: the AS sends indication information to the V2X layer, and the indication information is used to trigger The V2X layer establishes the unicast connection, and the indication information includes the second identifier; wherein the V2X layer of the first terminal device generates a unicast connection establishment request message, including: the V2X layer generates the unicast connection according to the indication information Create a request message.
  • the unicast connection between the first terminal device and the second terminal device is established by AS triggered.
  • the method further includes: the first terminal device uses the third identifier as a source identifier and the fourth identifier as a destination identifier, and sends the first terminal device to the second terminal device.
  • One AS configuration information is included in some implementations of the fifth aspect.
  • the first terminal device can transmit the AS configuration information through the unicast connection established with the second terminal device.
  • the first AS configuration information is used by the second terminal device to determine the first feedback resource
  • the first feedback resource is used by the second terminal device to initiate the first terminal device
  • the multicast communication performs hybrid automatic repeat request HARQ feedback.
  • the first AS configuration information is also used by the second terminal device to determine at least one second feedback resource, and the at least one second feedback resource is in addition to the target group.
  • the terminal devices other than the two terminal devices have a one-to-one correspondence, and any second feedback resource is used by the second terminal device to perform HARQ feedback on the multicast communication initiated by the terminal device corresponding to the second feedback resource.
  • the method further includes:
  • the first terminal device uses the third identifier as the source identifier and the fourth identifier as the destination identifier to send at least one piece of second AS configuration information to the second terminal device,
  • the at least one second AS configuration information has a one-to-one correspondence with terminal devices other than the second terminal device in the target group, and the second AS configuration information corresponding to the third terminal device is used for the third terminal device to determine at least one first terminal device.
  • the at least one third feedback resource corresponds to a terminal device other than the third terminal device in the target group in a one-to-one correspondence
  • any third feedback resource is used for the third terminal device to correspond to the third feedback resource HARQ feedback is performed on the multicast communication initiated by the terminal device of
  • the third terminal device is any terminal device in the target packet except the second terminal device.
  • the method further includes: the first terminal device receives the third AS configuration information sent by the second terminal device.
  • the third AS configuration information is used by the first terminal device to determine the second feedback resource
  • the second feedback resource is used by the first terminal device to the second terminal device
  • the initiated multicast communication performs hybrid automatic repeat request HARQ feedback.
  • the method before the first terminal device obtains the second identifier, the method further includes: the first terminal device uses the first identifier as the source identifier, and the target service type corresponds to The default identifier is the destination identifier, the broadcast packet establishment request message, where the first identifier is the source identifier assigned by the first terminal device for the multicast communication, the target service type is the service type that initiates the establishment of the target group, and the group establishment The request message is used to request the establishment of the target group, and the group establishment request message includes the group identifier allocated by the first terminal device for the target group and the information of the target group at the application layer; the first terminal device receives the packet fed back by the second terminal device The establishment accept message, wherein the sending of the group establishment request accept message uses the second identifier as the source identifier and the group identifier as the destination identifier.
  • the first terminal device can establish the target packet, and the first terminal device can learn the source identifier allocated by each terminal device in the target packet for the multicast communication.
  • a communication method including: a second terminal device receives a unicast connection establishment request message sent by a first terminal device; the second terminal device uses a fourth identifier as a source identifier and a third identifier as a destination identifier , Sending a unicast connection establishment response message to the first terminal device, where the third identifier is the source identifier allocated by the first terminal device for the unicast connection established by the unicast connection establishment request message, and the fourth identifier is the second The source identifier allocated by the terminal device for the unicast connection, and the first terminal device and the second terminal device belong to the target group.
  • the first terminal device and the second terminal device can establish a unicast connection based on information related to the target group, so that the purpose of transmitting AS configuration information can be realized based on the unicast connection.
  • the method further includes: the second terminal device uses the third identifier as the source identifier and the fourth identifier as the destination identifier, and receives the data sent by the first terminal device.
  • First AS configuration information the second terminal device uses the third identifier as the source identifier and the fourth identifier as the destination identifier, and receives the data sent by the first terminal device.
  • the method further includes: the second terminal device determines a first feedback resource according to the first AS configuration information, and the first feedback resource is used by the second terminal device to pair The multicast communication initiated by the first terminal device performs hybrid automatic repeat request HARQ feedback, and the multicast communication is communication for the target packet.
  • the second terminal device determines at least one second feedback resource according to the first AS configuration information, and the at least one second feedback resource and the target group are divided by the second Terminal devices other than the terminal device have a one-to-one correspondence, and any second feedback resource is used by the second terminal device to perform HARQ feedback on the multicast communication initiated by the terminal device corresponding to the second feedback resource.
  • the method further includes: the second terminal device uses the first identifier as a source identifier and the second identifier as a destination identifier, and receives a message sent by the first terminal device. At least one second AS configuration information; the second terminal device determines the feedback resource corresponding to any terminal device in the target group except the second terminal device according to the second AS configuration information, wherein the feedback resource of the third terminal device It includes at least one third feedback resource, and the at least one third feedback resource has a one-to-one correspondence with the terminal devices in the target group except the third terminal device, and any third feedback resource is used by the third terminal device for the second 3.
  • the multicast communication initiated by the terminal device corresponding to the feedback resource performs HARQ feedback
  • the third terminal device is any terminal device other than the second terminal device in the target packet.
  • the method further includes: the second terminal device uses the fourth identifier as a source identifier and the third identifier as a destination identifier, and sends and receives to the first terminal device.
  • Third AS configuration information used to configure the second terminal device.
  • the third AS configuration information is used by the first terminal device to determine the fourth feedback resource
  • the fourth feedback resource is used by the first terminal device to the second terminal device
  • the initiated multicast communication performs hybrid automatic repeat request HARQ feedback
  • the multicast communication is communication for the target packet.
  • the method before the second terminal device receives the unicast connection establishment request message sent by the first terminal device, the method further includes: the second terminal device uses the first identifier as The source identifier, which uses the default identifier corresponding to the target service type as the destination identifier, receives the group establishment request message broadcast by the first terminal device, where the target service type is the service type that initiates the establishment of the target group, and the group establishment request message is used for Request to establish the target group, the group establishment request message includes the group ID and the information of the target group at the application layer, the group ID is used to identify the target group; the second terminal device uses the second ID as the source ID, which is the group ID For the purpose of identification, a packet establishment acceptance message is sent to the first terminal device.
  • the source identifier which uses the default identifier corresponding to the target service type as the destination identifier
  • a communication method including: a first terminal device uses a first identifier as a source identifier and a default identifier corresponding to a target service type as a destination identifier, broadcasting a packet establishment request message, where the first identifier is The source identifier allocated by the first terminal device for the multicast communication, the multicast communication is a communication for a target packet, the target service type is the service type that initiates the establishment of the target packet, and the packet establishment request message is used to request establishment of the target packet ,
  • the group establishment request message includes the group identifier assigned by the first terminal device to the target group, the application layer information of the target group, and a third identifier, where the third identifier indicates that the first terminal device is the first terminal device and the target group.
  • the group identifier is used as the destination identifier, the second identifier is the source identifier allocated by the second terminal device for the multicast communication, the group establishment accept message includes a fourth identifier, and the fourth identifier indicates that the second terminal device is the second The source identifier assigned by the unicast connection between the terminal device and the first terminal device.
  • the first terminal device can establish a unicast connection with the terminal devices in the group during the establishment of the group, so that the purpose of transmitting AS configuration information can be achieved after the unicast connection is established .
  • the method further includes: the first terminal device uses the third identifier as the source identifier and the fourth identifier as the destination identifier, and sends the first terminal device to the second terminal device.
  • the first terminal device uses the third identifier as the source identifier and the fourth identifier as the destination identifier, and sends the first terminal device to the second terminal device.
  • the first terminal device can transmit the AS configuration information through the unicast connection with the second terminal device.
  • the first AS configuration information is used by the second terminal device to determine the first feedback resource
  • the first feedback resource is used by the second terminal device to initiate the first terminal device
  • the multicast communication performs hybrid automatic repeat request HARQ feedback.
  • the first AS configuration information is further used for the second terminal device to determine at least one second feedback resource, and the at least one second feedback resource is in addition to the target group.
  • the terminal devices other than the two terminal devices have a one-to-one correspondence, and any second feedback resource is used by the second terminal device to perform HARQ feedback on the multicast communication initiated by the terminal device corresponding to the second feedback resource.
  • the method further includes: the first terminal device uses the third identifier as the source identifier and the fourth identifier as the destination identifier, and sends at least One second AS configuration information, where the at least one second AS configuration information corresponds to the terminal devices other than the second terminal device in the target group in a one-to-one correspondence, and the second AS configuration information corresponding to the third terminal device is used for the first Three terminal devices determine at least one third feedback resource, the at least one third feedback resource has a one-to-one correspondence with terminal devices other than the third terminal device in the target group, and any third feedback resource is used for the third terminal device HARQ feedback is performed on the multicast communication initiated by the terminal device corresponding to the third feedback resource, and the third terminal device is any terminal device other than the second terminal device in the target packet.
  • the method further includes: the first terminal device receives the third AS configuration information sent by the second terminal device.
  • the third AS configuration information is used by the first terminal device to determine the second feedback resource
  • the second feedback resource is used by the first terminal device to the second terminal device
  • the initiated multicast communication performs hybrid automatic repeat request HARQ feedback.
  • a communication method including: a second terminal device uses a default identifier corresponding to a target service type as a destination identifier, and receives a packet establishment request message broadcast by the first terminal device, wherein the first terminal device and the second terminal device The terminal device belongs to the target group.
  • the multicast communication is for the target group.
  • the target service type is the service type that initiates the establishment of the target group.
  • the group establishment request message is used to request the establishment of the target group.
  • the group establishment request message includes The group identifier assigned by the first terminal device to the target group, the application layer information of the target group, and the third identifier, where the third identifier is the first terminal device between the first terminal device and other terminal devices in the target group
  • the source identifier allocated for the multicast communication, the packet establishment acceptance message includes a fourth identifier, and the fourth identifier is the source identifier allocated by the second terminal device for the unicast connection between the second terminal device and the first terminal device.
  • the first terminal device can establish a unicast connection with the terminal devices in the group during the establishment of the group, so that the purpose of transmitting AS configuration information can be achieved after the unicast connection is established .
  • the method further includes: the second terminal device uses the third identifier as a source identifier and the fourth identifier as a destination identifier, and receives a message sent by the first terminal device.
  • First access layer AS configuration information
  • the first terminal device can transmit the AS configuration information through the unicast connection with the second terminal device.
  • the method further includes: the second terminal device determines at least one second feedback resource according to the first AS configuration information, and the at least one second feedback resource is related to the target There is a one-to-one correspondence between terminal devices other than the second terminal device in the packet, and any second feedback resource is used by the second terminal device to perform HARQ feedback on the multicast communication initiated by the terminal device corresponding to the second feedback resource.
  • the method further includes: the second terminal device uses the third identifier as a source identifier and the fourth identifier as a destination identifier, and receives a message sent by the first terminal device.
  • the second terminal device determines the feedback resource corresponding to any terminal device in the target group except the second terminal device according to the second AS configuration information, wherein the feedback resource of the third terminal device It includes at least one third feedback resource, and the at least one third feedback resource has a one-to-one correspondence with the terminal devices in the target group except the third terminal device, and any third feedback resource is used by the third terminal device for the second 3.
  • the multicast communication initiated by the terminal device corresponding to the feedback resource performs HARQ feedback
  • the third terminal device is any terminal device other than the second terminal device in the target packet.
  • the method further includes: the second terminal device uses the fourth identifier as a source identifier and the third identifier as a destination identifier, and sends and receives to the first terminal device.
  • Third AS configuration information used to configure the second terminal device.
  • the third AS configuration information is used by the first terminal device to determine the fourth feedback resource
  • the fourth feedback resource is used by the first terminal device to the second terminal device
  • the initiated multicast communication performs hybrid automatic repeat request HARQ feedback.
  • a communication method including: a first terminal device uses a first identifier as a source identifier and a default identifier corresponding to a target service type as a destination identifier, broadcasting a packet establishment request message,
  • the first identifier is a source identifier allocated by the first terminal device for multicast communication
  • the multicast communication is communication for a target packet
  • the target service type is a service type that initiates the establishment of the target packet
  • the group establishment request message is used to request the establishment of the target group, and the group establishment request message includes the group identifier allocated by the first terminal device for the target group and the information of the target group at the application layer;
  • the first terminal device receives a packet establishment request acceptance message fed back by other terminal devices in the target packet.
  • the first terminal device can establish a target group.
  • a communication method including: a second terminal device receives a packet establishment request message broadcast by a first terminal device, the packet establishment request message is used to request establishment of a target packet, and the packet establishment request message includes all The group identifier assigned to the target group by the V2X layer of the first terminal device and the information of the target group at the application layer;
  • the second terminal device uses the second identifier as the source identifier and the group identifier as the destination identifier to send a group establishment request acceptance message to the first terminal device, where the first identifier is that the first terminal device is The source identifier assigned by the multicast communication, the second identifier is the source identifier assigned by the second terminal device for the multicast communication, and the multicast communication is communication for a target packet.
  • the second terminal device can join the target group.
  • a communication method including: a first terminal device sends AS configuration information to a second terminal device, and starts a unicast connection association between the first terminal device and the second terminal device The first timer; during the running of the first timer, if the first terminal device receives a response message to the AS configuration information sent by the second terminal device, the first terminal device stops The first timer; or, when the first timer expires, if the first terminal device does not receive the response message to the AS configuration information sent by the second terminal device, the first A terminal device determines that the configuration based on the AS configuration information has failed.
  • the first terminal device may not receive the response to the AS configuration information sent by the second terminal device
  • the content related to the unicast connection is processed in time to avoid long-term business interruption.
  • said starting the first timer associated with the unicast connection between the first terminal device and the second terminal device includes: The first terminal device starts the first timer when its RRC entity generates a side link RRC message and sends it to the bottom layer of the RRC entity, where the RRC message includes the AS configuration information.
  • the bottom layer of the RRC entity refers to the next layer of RRC.
  • the method further includes: in a case where the first timer expires, the first terminal device sends instruction information to the network device, so The indication information is used to indicate that the first timer expires.
  • the method further includes one or more of the following: the first terminal device stops transmitting to the second terminal device through the unicast connection; the first terminal device Releasing the sending buffer of the unicast connection, where the sending buffer includes one or more of the following: a resource request (source request, SR) to be sent, a buffer status report BSR to be sent, and data to be sent;
  • the AS of the first terminal device indicates to the upper layer that the first terminal device did not receive the response message to the AS configuration information sent by the second terminal device when the first timer expires, and the upper layer For vehicles to all V2X layers or application layers; in the case that the V2X layer receives the instructions sent by the AS, the V2X layer initiates a unicast connection release process, and the V2X layer instructs the AS to release the
  • the method further includes: the first terminal device performs the unicast connection link recovery.
  • the performing the unicast connection link recovery by the first terminal device includes: performing the unicast connection link by the first terminal device Restore and start a second timer; and, the method further includes: if the unicast link is successfully restored during the running of the second timer, stopping the second timer.
  • a communication device which includes various modules or units for executing the method in any one of the possible implementation manners of the first aspect to the eleventh aspect and the first aspect to the eleventh aspect.
  • an apparatus including a processor.
  • the processor is coupled to the memory and can be used to execute instructions in the memory, so that the device executes the method in any one of the foregoing first aspect to the eleventh aspect and the first aspect to the eleventh aspect.
  • the device further includes a memory.
  • the device further includes an interface circuit, and the processor is coupled with the interface circuit.
  • a processor including: an input circuit, an output circuit, and a processing circuit.
  • the processing circuit is configured to receive signals through the input circuit and transmit signals through the output circuit, so that the processor executes any one of the first aspect to the eleventh aspect and any one of the possible implementation manners of the first aspect to the eleventh aspect method.
  • the foregoing processor may be a chip
  • the input circuit may be an input pin
  • the output circuit may be an output pin
  • the processing circuit may be a transistor, a gate circuit, a flip-flop, and various logic circuits.
  • the input signal received by the input circuit may be received and input by, for example, but not limited to, a receiver
  • the signal output by the output circuit may be, for example, but not limited to, output to and transmitted by the transmitter
  • the circuit can be the same circuit, which is used as an input circuit and an output circuit at different times.
  • the embodiments of the present application do not limit the specific implementation manners of the processor and various circuits.
  • a processing device including a processor and a memory.
  • the processor is used to read instructions stored in the memory, receive signals through a receiver, and transmit signals through a transmitter, so as to implement any possible implementation of the first aspect to the eleventh aspect and the first aspect to the eleventh aspect The method in the way.
  • processors there are one or more processors and one or more memories.
  • the memory may be integrated with the processor, or the memory and the processor may be provided separately.
  • the memory can be a non-transitory (non-transitory) memory, such as a read only memory (ROM), which can be integrated with the processor on the same chip, or can be set in different On the chip, the embodiment of the present application does not limit the type of memory and the setting mode of the memory and the processor.
  • ROM read only memory
  • the processing device in the fourteenth aspect may be a chip, and the processor may be implemented by hardware or software.
  • the processor When implemented by hardware, the processor may be a logic circuit, an integrated circuit, etc.; when implemented by software
  • the processor may be a general-purpose processor, which is implemented by reading software codes stored in the memory.
  • the memory may be integrated in the processor, may be located outside the processor, and exist independently.
  • a computer program product includes: a computer program (also called code, or instruction), which when the computer program is executed, causes the computer to execute the first to tenth aspects above.
  • a computer program also called code, or instruction
  • One aspect and the method in any one of the possible implementation manners from the first aspect to the eleventh aspect.
  • a computer-readable storage medium stores a computer program (also called code, or instruction) when it runs on a computer, so that the computer executes the above-mentioned first aspect To the method in the eleventh aspect and any one of the first to the eleventh aspects.
  • a computer program also called code, or instruction
  • a communication system including the aforementioned first terminal device and/or second terminal device.
  • Figure 1 is a schematic diagram of a V2X communication architecture
  • Figure 2 is a schematic diagram of a V2X group communication
  • Fig. 3 is a schematic flowchart of a communication method provided by the present application.
  • Fig. 4 is a schematic flowchart of a communication method provided by the present application.
  • FIG. 5 is a schematic flowchart of a communication method provided by this application.
  • Fig. 6 is a schematic flowchart of a communication method provided by the present application.
  • Fig. 7 is a schematic flowchart of a communication method provided by the present application.
  • FIG. 8 is a schematic structural diagram of a communication device provided by the present application.
  • FIG. 9 is a schematic structural diagram of a terminal device provided by this application.
  • Fig. 10 is a schematic structural diagram of another communication device provided by the present application.
  • V2X vehicle to everything
  • the V2X scenario may specifically be any of the following systems: vehicle-to-vehicle (V2V), vehicle-to-pedestrian (V2P), vehicle-to-network (V2N) business Communication with vehicles and infrastructure (V2I), etc.
  • V2V vehicle-to-vehicle
  • V2P vehicle-to-pedestrian
  • V2N vehicle-to-network
  • V2I business Communication with vehicles and infrastructure
  • D2D may be long term evolution (LTE) D2D, new radio (NR) D2D, and may also be D2D in other communication systems that may appear with the development of technology.
  • V2X can be LTE V2X, NR V2X, and can also be V2X in other communication systems that may emerge with the development of technology.
  • the terminal equipment in the embodiment of the present application may be, for example, user equipment (UE), a vehicle, a sensor mounted on the vehicle, an on-board unit (OBU), a roadside unit (RSU), Subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, terminal, wireless communication equipment, user agent, user device, cellular phone, cordless phone, session initiation protocol, SIP) phones, wireless local loop (WLL) stations, personal digital assistants (personal digital assistants, PDAs), handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, wearables Equipment etc.
  • UE user equipment
  • OEM on-board unit
  • RSU roadside unit
  • Subscriber unit Subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, terminal, wireless communication equipment, user agent, user device, cellular phone, cordless phone, session initiation protocol, SIP) phones, wireless local loop (WLL) stations, personal digital assistants (personal digital assistant
  • the terminal device in the embodiments of the present application may also refer to a chip in the terminal device, a communication device, unit or module with D2D or V2X communication functions, such as a vehicle-mounted communication device, a vehicle-mounted communication module, or a vehicle-mounted communication chip.
  • the terminal device being a UE as an example.
  • the UE may be replaced with other forms of terminal equipment (or chips or circuits in the terminal equipment, etc.), such as vehicle-mounted equipment, wearable equipment, and so on.
  • the base station in this application refers to a network device, or a chip or circuit configured in the network device.
  • the network equipment can be evolved Node B (eNB), radio network controller (RNC), Node B (Node B, NB), base station controller (BSC), base station transceiver Station (base transmitter station, BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), baseband unit (BBU), wireless fidelity (wireless fidelity, WiFi) system access point (access point, AP), wireless relay node, wireless backhaul node, transmission point (transmission point, TP) or transmission and reception point (transmission and reception point, TRP), etc., can also be 5G, such as NR, in the system GNB, or transmission point (TRP or TP), one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G system, or, it can also be a network node that constitutes a gNB or transmission point, such as a baseband unit
  • the gNB may include a centralized unit (CU) and a DU.
  • the gNB may also include an active antenna unit (AAU for short).
  • CU implements some functions of gNB
  • DU implements some functions of gNB.
  • CU is responsible for processing non-real-time protocols and services, implementing radio resource control (RRC), and packet data convergence protocol (PDCP) The function of the layer.
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • the DU is responsible for processing physical layer protocols and real-time services, and realizes the functions of the radio link control (RLC) layer, media access control (MAC) layer, and physical (PHY) layer.
  • RLC radio link control
  • MAC media access control
  • PHY physical
  • the network device may be a device that includes one or more of a CU node, a DU node, and an AAU node.
  • the CU can be divided into network equipment in an access network (radio access network, RAN), or the CU can be divided into network equipment in a core network (core network, CN), which is not limited in this application.
  • This application can be applied to a variety of application scenarios, such as D2D, relay, wireless mesh network (Mesh), integrated access & backhaul (IAB), vehicle to everything (V2X), UE collaboration, high-frequency transmission, industrial scenarios, robot collaboration, Internet of Things and other scenarios.
  • application scenarios such as D2D, relay, wireless mesh network (Mesh), integrated access & backhaul (IAB), vehicle to everything (V2X), UE collaboration, high-frequency transmission, industrial scenarios, robot collaboration, Internet of Things and other scenarios.
  • FIG 1 shows a schematic diagram of the V2X communication architecture.
  • the architecture includes two communication interfaces, PC5 interface and Uu interface.
  • the PC5 interface is a direct communication interface between UEs with V2X communication functions (for example, V2XUE 1 and V2X UE 2 shown in the figure), and the direct communication link between V2X UEs is also defined as a side link or Sidelink (SL).
  • SL Sidelink
  • Uu interface communication is when the sender V2X UE (for example, V2X UE 1) sends V2X data to the base station through the Uu interface, sends it to the V2X application server through the base station for processing, and then the V2X application server delivers to the base station and sends it through the base station
  • the communication method for the receiver V2X UE (for example, V2X UE 2).
  • the base station that forwards the uplink data of the sender V2X UE to the application server and the base station that forwards the downlink data delivered by the application server to the receiver V2X UE can be the same base station or different base stations. It can be determined by the location of the V2X UE. It should be understood that the transmission of the sender V2X UE to the base station is called uplink (UL) transmission, and the transmission of the base station to the receiver V2X UE is called downlink (DL) transmission.
  • UL uplink
  • DL downlink
  • NR V2X supports multicast communication.
  • one group may include N (N ⁇ 2) UEs, as shown in the figure, UE#1, UE#2, UE#3, and UE#4.
  • N N ⁇ 2 UEs
  • UE#1, UE#2, UE#3, and UE#4 Within a packet, there may be a need to transmit AS-related information, that is, there may be scenarios where information transmission is not triggered by the APP layer.
  • the unicast connection can only be triggered by the APP layer, and there is no unicast connection or multicast solution triggered by the AS, so the UE cannot learn the resources for performing HARQ.
  • this application provides a communication method.
  • a unicast connection between UEs in the group can also be established to transmit AS-related information, such as information indicating resources for HARQ feedback.
  • AS-related information such as information indicating resources for HARQ feedback.
  • the PC5-S signaling of the multicast communication can also be used to transmit AS-related information.
  • the UE that initiates the establishment of the target group is referred to as the "leader UE” in this article, and the other UEs in the target group are referred to as the "member UE”.
  • leader UE the UE that initiates the establishment of the target group
  • member UE the UE that initiates the establishment of the target group
  • member UE the UE that initiates the establishment of the target group
  • member UE the UE that initiates the establishment of the target group
  • the member UE the UE that initiates the establishment of the target group
  • the head UE in this article is only the UE that initiates the establishment of a group, and may not have other features of the head UE in the prior art.
  • the head UE in this document may or may not be the head UE in the prior art.
  • Fig. 3 is a schematic flowchart of a communication method provided by the present application. Through this method 300, groups can be established to realize multicast communication. It should be understood that, in the method 300, the first UE may correspond to the first terminal device, the second UE may correspond to the second terminal device, the identifier #1 may correspond to the first identifier, and the identifier #2 may correspond to the second identifier. Not limited.
  • the method 300 may include S310 and S320, and each step is described below.
  • S310 The first UE broadcasts a group establishment request message.
  • the first UE when the first UE needs to initiate multicast communication, it may first establish a group for the service type. After the group is established, the first UE can perform multicast communication.
  • the first UE when it needs to initiate a multicast communication for a target service type, it may first establish a target group through a broadcast packet establishment request message. Specifically, the first UE may allocate a source identifier (denoted as: identifier #1) and a group identifier (denoted as: group identifier) for the multicast communication.
  • the identifier #1 can be used as the Layer 2 (L2) Source ID when the first UE initiates multicast communication
  • the group identifier can be used as the destination identifier when the first UE initiates multicast communication, that is, the L2 Destinations ID.
  • the first UE uses the identifier #1 as the source identifier and the default identifier corresponding to the target service type as the destination identifier, and broadcasts the group establishment request message.
  • the group establishment request message includes the group identifier and/or information of the target group at the application layer.
  • the information of the target group at the application layer may be, for example, the identifier of the group at the application layer. It should be understood that if the group establishment request message carries the information of the target group at the application layer, based on the information of the target group at the application layer, the UE in the group can map the group identifier corresponding to the target group based on the same mapping rule.
  • the first UE uses the identifier #1 as the source identifier and the default identifier corresponding to the target service as the destination identifier, and broadcasts the group establishment request message" means that the first UE requests the establishment of the group at the MAC layer.
  • the identifier #1 is used as the source identifier
  • the default identifier corresponding to the target service is used as the destination identifier, encapsulated in the corresponding MAC PDU header, and then passed to the physical layer for processing and sending.
  • S320 The member UE replies to a group establishment request acceptance message.
  • the member UE After the member UE receives the group establishment request message, if based on the information contained in the group establishment request message, it confirms that the target group is the group that it needs to join, then it allocates a source for the target group or multicast communication for the target group Logo. In addition, each member UE uses its own identifier allocated for multicast communication as the source identifier and the group identifier as the destination identifier, and replies to the group establishment request acceptance message.
  • the second UE After receiving the group establishment request message, if the second UE confirms to join the target group, it assigns a source identifier (denoted as: identifier #2) for the multicast communication, and uses identifier #2 as the source identifier, and the group The identifier is the destination identifier, and the group establishment request acceptance message is returned to the first UE. At this time, the second UE is a member UE.
  • a source identifier denoted as: identifier #2
  • the second UE uses identifier #2 as the source identifier and the group identifier as the destination identifier, and replies to the group establishment request acceptance message" means that when the second UE processes the group establishment request acceptance message at the MAC layer, it will identify #2 As the source identifier, subpackage it on the corresponding MAC PDU header, use the group identifier as the destination identifier, and encapsulate the first part of the destination identifier on the corresponding MAC PDU header, and then pass the MAC PDU to the physical layer for processing Processing.
  • the remaining part of the destination identifier is encapsulated in the information of the physical layer at the physical layer, specifically, it can be encapsulated in the SCI generated by the physical layer, and then finally sent out.
  • the unicast communication also uses the above Way to send.
  • any UE in the target group can use the source identifier assigned for multicast communication as the source identifier and the group identifier as the destination identifier to initiate multicast communication.
  • the first UE may use the identifier #1 as the source identifier and the group identifier as the destination identifier to multicast data to the member UEs.
  • the second UE may use the identifier #2 as the source identifier and the group identifier as the destination identifier to multicast data to the first UE and member UEs other than itself.
  • the manner in which the UE in the target packet uses the source identification and the destination identification to perform multicast communication is the same as the manner in which the second UE uses the source identification and the destination identification to send the packet establishment request acceptance message mentioned above, and will not be repeated here. Repeat.
  • a grouping can be established, thereby realizing multicast communication.
  • UE#1 corresponds to the first terminal device
  • UE#2 corresponds to the second terminal device.
  • the first identifier is UE#1, which is a source identifier allocated for multicast communication of the target packet
  • the second identifier is UE#2, which is a source identifier allocated for multicast communication of the target packet.
  • UE#1 can be the head UE, and UE#2 can be any member UE.
  • UE#1 may be the first UE in method 300
  • UE#2 may be the second UE in method 300. It can be understood that when UE#1 is the first UE and UE#2 is the second UE, the first identifier may correspond to the identifier #1 in the method 300, and the second identifier may correspond to the identifier #2 in the method 300.
  • UE#1 and UE#2 may be any two member UEs.
  • UE#1 and UE#2 may be any two member UEs in group #1 described in method 300.
  • UE#1 may be any member UE, and UE#2 may be the head UE.
  • UE#1 may be the second UE mentioned above, and UE#2 may be the first UE in the method 300. It can be understood that when UE#1 is the second UE and UE#2 is the first UE, the first identifier may correspond to the identifier #2 in the method 300, and the second identifier may correspond to the identifier #1 in the method 300.
  • multicast communication refers to the multicast communication of the target packet.
  • the target group may be established by the method 300, may also be established by other methods, or may also be obtained by other methods. No matter what method is used to establish or learn the target group, each UE in the target group can be assigned a source identifier for multicast communication, and UE#1 can obtain the source identifier assigned by each UE in the target group for multicast communication, and The group ID corresponding to the target group. For example, when the target group is established by the method 300, if UE#1 is not the head UE, then UE#1 may initiate a separate request process to obtain the allocation of each UE in the target group for multicast communication after determining to join the group. Source ID.
  • any UE in the group can obtain the information of the target group in the application layer and the information of the group members in the application layer from its own application layer. Based on the information of the target group in the application layer, the UE in the group can map the target group corresponding The group ID. Based on the information of the group members at the application layer, the UEs in the group can map the source identities of all UEs in the group (equivalent to the source identities allocated for multicast communication). At this time, when all UEs in the group perform the foregoing mapping behavior, they follow a set of unified algorithms, so that the information mapped by all UEs in the group is consistent with each other. It should be understood that all steps related to obtaining the first identifier and/or the second identifier appearing below can refer to the description here.
  • Any UE in the target group initiates multicast communication means that the UE multicasts data to other UEs in the target group.
  • the HARQ feedback performed by a UE in the target group on the multicast communication initiated by another UE refers to the transport block (TB) corresponding to the data multicast by the UE in the target group to the other UE. Perform HARQ feedback.
  • the interaction between UE#1 and other UEs can refer to the interaction between UE#1 and UE#2.
  • FIG. 4 shows a communication method, and the method 400 may include S410 and S420. The steps shown in Figure 4 will be described below.
  • S410: UE#1 obtains the first identifier and the second identifier.
  • S420: UE#1 uses the first identifier as the source identifier and the second identifier as the destination identifier, and sends the first AS configuration information to UE#2.
  • UE#2 uses the first identifier as the source identifier and the second identifier as the destination identifier to receive the first AS configuration information.
  • the first AS configuration information is information related to the AS, or the first AS configuration information is used to configure the AS.
  • the first AS configuration information may be sent through side link radio resource control (Radio Resource Control, RRC) signaling.
  • RRC Radio Resource Control
  • UE#1 can use the first identifier as the source identifier and the second identifier as the destination identifier to establish a signaling radio bearer (SRB) with UE#2.
  • SRB signaling radio bearer
  • the sending side can be Uplink RRC signaling.
  • the first AS configuration information may be used for UE#1 to determine the first feedback resource or information for determining the first feedback resource. That is, UE#1 may determine the first feedback resource according to the first AS configuration information.
  • the first feedback resource may be used for UE#2 to perform HARQ feedback on the multicast communication initiated by UE#1.
  • the first AS configuration information may include an index #1 (or ID), and UE#1 may determine the first feedback resource according to the index #1.
  • the first AS configuration information may also include a second identifier.
  • the feedback resource may include at least one of time domain resources, frequency domain resources, and code resources.
  • time domain resource may include one or more of the start symbol position, the number of occupied symbols, the end position, and the period.
  • the frequency domain resources may include one or more of the starting frequency domain position, the number of occupied subchannels, and the ending frequency domain position.
  • the code resource may be, for example, a code or sequence used for HARQ feedback.
  • UE#2 may determine the first feedback resource according to the first AS configuration information and the resources used by the multicast communication initiated by UE#1.
  • the first AS configuration information may indicate the relationship between the start position of the first feedback resource in the time domain/frequency domain and the end position of the time domain and frequency domain resources used for the multicast communication initiated by UE#1. It can be understood that there is at least one feedback resource corresponding to the resource used by the multicast communication initiated by UE#1, and UE#2 may first determine the at least one feedback resource based on the resource used by the multicast communication initiated by UE#1 , Further determining, in the at least one feedback resource based on the first AS configuration information, a feedback resource available to itself, that is, the first feedback resource.
  • UE#2 may determine the first feedback resource according to the first AS configuration information and the indication information of UE#1.
  • UE#1 will include an indication information in sidelink control information (SCI)
  • the indication information indicates at least one feedback resource corresponding to the multicast communication
  • UE#2 receives the indication information and determines
  • the at least one feedback resource is determined from the at least one feedback resource based on the first AS configuration information, which is the first feedback resource that can be used by itself.
  • SCI sidelink control information
  • UE#2 may determine the first feedback resource from the pre-configured resources according to the first AS configuration information. For example, UE#2 may determine the first feedback resource according to the correspondence between the predefined index value and the feedback resource.
  • UEs other than UE#1 and UE#2 in the target group can also send a piece of information to UE#2 respectively, and this information can be used for UE#1 to determine the information initiated to the corresponding UE.
  • Resource for HARQ feedback in multicast communication For example, if the target packet also includes UE#3 and UE#4, UE#3 can send information #1 to UE#2, and information #1 can be used by UE#2 to determine HARQ for the multicast communication initiated by UE#3
  • UE#4 can send message #2 to UE#2, and message #2 can be used by UE#2 to determine the resource for HARQ feedback for the multicast communication initiated by UE#4.
  • each UE sends the information it uses its own identifier allocated for multicast communication as the source identifier and the second identifier as the destination identifier.
  • UE#2 may also respectively send a piece of information to other UEs in the target group, and each piece of information is used for the corresponding UE to determine the resource for HARQ feedback of the multicast communication initiated by UE#2.
  • UE#2 may use the second identifier as the source identifier and the first identifier as the destination identifier to send the third AS configuration information to UE#1.
  • UE#1 may use the second identifier as the source identifier and the first identifier as the destination identifier to receive the third AS configuration information.
  • the third AS configuration information may be used for UE#1 to determine the fourth feedback resource, and the fourth feedback resource is used for UE#1 to determine HARQ feedback on the multicast communication initiated by UE#2.
  • the first AS configuration information may also be used for UE#2 to determine at least one second feedback resource.
  • the at least one second feedback resource has a one-to-one correspondence with UEs other than UE#2 in the target group, and any second feedback resource is used for UE#2 to perform HARQ feedback on the multicast communication initiated by the UE corresponding to the second feedback resource .
  • UE#2 can determine the HARQ feedback resource for the multicast communication initiated by all UEs except itself in the target group according to the first AS configuration information.
  • UE#1 can determine the HARQ feedback resource for multicast communication initiated by all UEs except itself in the target group according to index #1.
  • the manner in which UE#2 determines any second feedback resource may be similar to the manner in which UE#1 determines the first feedback resource, and will not be repeated here.
  • the same resource or different resources may be used, which is not limited in this application. That is, the at least one second feedback resource may be the same, and the at least one second feedback resource may be the same as the first feedback resource. Or, the at least one second feedback resource is different from the first feedback resource.
  • UE#1 in addition to sending the first AS configuration information, may also use the first identifier as the source identifier and the second identifier as the destination identifier to send at least one second AS configuration information to UE#2.
  • UE#2 uses the first identifier as the source identifier and the second identifier as the destination identifier to receive the at least one second AS configuration information. That is, if UE#2 receives the at least one second AS configuration information sent with the first identifier as the source identifier and the second identifier as the destination identifier, it can be determined that the at least one second AS configuration information is sent For yourself, and the at least one second AS configuration information is applied to the target group.
  • the second AS configuration information is information related to the AS, or the second AS configuration information is used to configure the AS.
  • first AS configuration information and the at least one second AS configuration information may be sent through the same message.
  • first AS configuration information and the at least one second AS configuration information may be included in the AS configuration information item.
  • the first AS configuration information and the at least one second AS configuration information may be sent separately through two messages, which are not limited in this application.
  • the at least one second AS configuration information has a one-to-one correspondence with UEs other than UE#2 in the target group.
  • the second AS configuration information corresponding to UE#3 is used by the third UE to determine at least one third feedback resource, and the at least one third feedback resource has a one-to-one correspondence with UEs other than the third UE in the target group.
  • the third feedback resource is used for the third UE to perform HARQ feedback on the multicast communication initiated by the UE corresponding to the third feedback resource, and the third UE is any UE in the target group except UE#2.
  • UE#2 can determine the resources for HARQ feedback by all UEs except itself to the multicast communication initiated by other UEs according to the second AS configuration information. For example, assuming that the target group includes UE#1, UE#2, UE#3, and UE#4, UE#2 can determine that UE#2, UE#3, and UE#4 respectively initiate the group according to the second AS configuration information During broadcast communication, UE#1 performs HARQ feedback resources, determines UE#1, UE#2, and UE#4 separately initiates multicast communication, UE#3 performs HARQ feedback resources, and determines UE#1, UE#2 When UE#3 initiates multicast communication separately, UE#4 carries out HARQ feedback resources.
  • the manner of determining the third feedback resource may be similar to the manner of determining the first feedback resource, and will not be repeated here.
  • the resources used may be the same or different, which is not limited in this application.
  • the second AS configuration information may also include an index, but this application does not limit this.
  • the second AS configuration information may also include a source identifier allocated for multicast communication by the UE corresponding to the second AS configuration information.
  • the first AS configuration information may also include configuration information related to the target group, including one or more of receiving resource pool configuration, sending resource pool configuration, synchronization source configuration, and bearer configuration.
  • the communication method provided by the present application can use the identifier assigned to the multicast communication by each UE when the group is established to realize unicast communication between the UEs in the group, thereby achieving the purpose of transmitting AS configuration information.
  • This method does not require an additional unicast connection establishment process, and is simple to implement.
  • the method 400 describes that UE#1 and UE#2 use their respective source identifiers allocated for multicast communication to perform unicast communication. In fact, any two UEs in the target group can use their respective allocations for multicast communication. For unicast communication with the source identifier of, this article will not repeat them one by one.
  • FIG. 5 shows a communication method, and the method 500 may include S510 to S550. The steps shown in FIG. 5 will be described below.
  • S510: UE#1 obtains the second identifier.
  • S520 The V2X layer of UE#1 generates a unicast connection establishment request message.
  • the unicast connection establishment request message may include a group identifier.
  • the unicast connection establishment request message may include the second identifier.
  • the unicast connection establishment request message may also include a group identifier.
  • the generation of the unicast connection establishment request message may be triggered by the V2X layer or by the AS.
  • the AS may first send indication information to the V2X layer, and the V2X layer may generate the unicast connection establishment request message according to the indication information.
  • the indication information includes a group identifier.
  • the indication information includes a second identifier.
  • the V2X layer of UE#1 sends the unicast connection establishment request message, the third identifier, and the default identifier corresponding to the target service type to the AS of UE#1.
  • the third identifier is the source identifier allocated by UE#1 for the unicast connection established by the unicast connection establishment request message.
  • S540 The AS of UE#1 broadcasts the unicast connection establishment request message.
  • the AS of UE#1 broadcasts the unicast connection establishment request message using the third identifier as the source identifier and the default identifier corresponding to the target service type as the destination identifier.
  • any UE in the target group receives the unicast connection establishment request message, if it decides to establish a unicast connection with UE#1, it can allocate one for the unicast connection Source identification and generate a unicast connection establishment response message. For example, for UE#2, if UE#2 decides to establish a unicast connection with UE#1, it can allocate a source identifier (denoted as: the fourth identifier) for the unicast connection, and generate a unicast connection Create a response message.
  • a source identifier denoted as: the fourth identifier
  • UE#2 uses the fourth identifier as the source identifier and the third identifier as the destination identifier to send a unicast connection establishment response message in a unicast communication manner.
  • UE#1 receives the unicast connection establishment response message, it can determine that the unicast connection establishment is complete, and then it can communicate with UE#2 through the unicast connection identified by the third identifier and the fourth identifier.
  • Unicast communication
  • the V2X of UE#2 parses the unicast connection establishment request message, and obtains the second identifier in the unicast connection establishment request message, it can determine the unicast connection establishment request The message is sent to myself.
  • a source identifier that is, a fourth identifier
  • UE#2 uses the fourth identifier as the source identifier and the third identifier as the destination identifier to send a unicast connection establishment response message.
  • UE#1 After UE#1 receives the unicast connection establishment response message, it can determine that the unicast connection establishment is complete, and then it can communicate with UE#2 through the unicast connection identified by the third identifier and the fourth identifier. Unicast communication.
  • the method may also include:
  • S560 UE#1 uses the third identifier as a source identifier and the fourth identifier as a destination identifier, and sends the first AS configuration information to UE#2.
  • UE#2 uses the third identifier as the source identifier and the fourth identifier as the destination identifier to receive the first AS configuration information.
  • S510 to S550 describe the procedure for establishing a unicast connection between UE#1 and UE#2.
  • any two UEs in the target group can refer to the establishment of a unicast connection between UE#1 and UE#2.
  • the process of broadcasting connection and establishing unicast connection are not repeated in this article.
  • UE#1 may allocate different source identifiers for unicast connections established with different UEs in the target group. For example, UE#1 may allocate a third identity to UE#2 and a fifth identity to UE#3.
  • the UEs in the target group other than UE#1 and UE#2 can send a piece of information to UE#2, and this information can be used for UE# 1 Determine the resource for HARQ feedback for the multicast communication initiated by the corresponding UE. It should be understood that when each UE sends the information, it uses the source identifier allocated for the unicast connection between itself and UE#2 as the source identifier, and UE#2 is the unicast between the UE and UE#1. The source identifier assigned by the connection is the destination identifier.
  • UE#2 may also respectively send a piece of information to other UEs in the target group, and each piece of information is used for the corresponding UE to determine the resource for HARQ feedback of the multicast communication initiated by UE#2.
  • UE#2 may use the fourth identifier as the source identifier and the third identifier as the destination identifier to send the third AS configuration information to UE#1.
  • UE#1 may use the fourth identifier as the source identifier and the third identifier as the destination identifier to receive the third AS configuration information.
  • the third AS configuration information may be used for UE#1 to determine the fourth feedback resource, and the fourth feedback resource is used for UE#1 to determine HARQ feedback on the multicast communication initiated by UE#2.
  • UE#1 in addition to sending the first AS configuration information, may also use the third identifier as the source identifier and the fourth identifier as the destination identifier to send UE# 2 Send at least one second AS configuration information.
  • the second AS configuration information please refer to the description made in the method 400, which will not be repeated here.
  • unicast establishment can be established between UEs in a group, so that unicast communication can be performed, and the purpose of transmitting AS configuration information can be realized.
  • FIG. 6 shows a communication method, and the method 600 may include S610 to S640. The steps shown in FIG. 6 will be described below.
  • UE#1 may also obtain source identifiers allocated for multicast communication by UEs other than UE#2 in the target packet.
  • S620 The V2X layer of UE#1 generates first side uplink signaling.
  • the first side link may include the source identifier (ie, the second identifier) allocated by UE#2 for multicast communication and the AS configuration information of UE#2.
  • the first side link signaling may include the source identifier allocated for multicast communication by each UE in the target packet and the AS configuration information of each UE.
  • the first side uplink signaling includes a source identifier list
  • the source identifier list includes source identifiers allocated by each UE in the target packet for multicast communication.
  • the positions of the first source identifier and the first source identifier in the source identifier list indicate the AS configuration information of the UE corresponding to the first source identifier
  • the first source identifier is the source identifier allocated by any UE in the target packet for multicast communication . That is to say, any source identifier in the source identifier list and the position of the source identifier in the source identifier list are used for the UE corresponding to the source identifier to determine its corresponding AS configuration information.
  • the first side uplink signaling may also include a group identification.
  • first side uplink signaling may also be referred to as PC5-S signaling.
  • the generation of the first side uplink signaling can be triggered by the V2X layer or by the AS.
  • the AS can first send configuration information to the V2X layer, and the V2X layer can generate the first side uplink signaling according to the configuration information.
  • the configuration information may include a group identifier, and AS configuration information including the second identifier and UE#2.
  • the configuration information may also include the source identifier allocated by each UE for multicast communication in the target packet and the AS configuration information of each UE.
  • the configuration information may include a group ID and a source ID list.
  • the V2X layer of UE#1 sends the first side uplink signaling, the first identifier, and the group identifier to the AS of UE#1.
  • S640 The AS of UE#1 uses the first identifier as the source identifier and the group identifier as the destination identifier, and sends the first side uplink signaling.
  • the V2X layer of each UE in the target group may use the first identifier as the source identifier and the group identifier as the destination identifier to receive the first side uplink signaling.
  • the V2X layer of each UE can obtain the content in the first side uplink signaling and can send the obtained content to the AS.
  • the AS of each UE in the target group can obtain the AS configuration information of UE#2.
  • the AS of each UE in the target group can obtain the AS configuration information of each UE in the target group.
  • each UE in the target group can obtain a source identifier list.
  • the AS configuration information of UE#2 may include the first AS configuration information.
  • first AS configuration information please refer to the above description for details.
  • the AS configuration information of UE#2 may also include at least one second AS configuration information.
  • the second AS configuration information please refer to the above description for details.
  • the AS configuration information of UE#2 may include the first AS configuration information.
  • first AS configuration information refer to the above description for details.
  • AS configuration information of other UEs in the target group is similar to the AS configuration information of UE#2, and reference may be made to the description of the AS configuration information of UE#2.
  • the method may further include: UE#2 uses the second identifier as the source identifier and the group identifier as the destination identifier to send the second side uplink signaling.
  • the second side uplink signaling may include the third AS configuration information.
  • the third AS configuration information please refer to the above description.
  • the method provided in this application can exchange the AS configuration information of the UEs in the group through side link signaling to achieve the purpose of transmitting the AS configuration information.
  • This application also provides a communication method, which can establish a unicast connection in the process of establishing a packet. Description will be given below in conjunction with FIG. 7.
  • Fig. 7 shows a communication method, which may include S710 and S720. The steps shown in FIG. 7 will be described below. It should be understood that UE#1 and UE#2 here correspond to the first UE and the second UE in the method 300, respectively, and the first identity and the second identity correspond to the identity #1 and the identity #2 in the method 300.
  • S710 UE#1 broadcasts a packet establishment request message.
  • the group establishment request message here may further include a third identifier, and the third identifier is the source identifier allocated by UE#1 for the unicast connection between UE#1 and the UE in the target group.
  • S720 The member UE replies to a group establishment request acceptance message.
  • a source identifier is assigned to the unicast connection, and the source identifier is included in the reply packet establishment request acceptance message .
  • a source identifier (denoted as a fourth identifier) for the unicast connection may be separately provided, and then the fourth identifier is carried in the packet establishment request acceptance message.
  • UE#1 receives the group establishment request acceptance message replies from each member UE, and can parse out the source identifier allocated by each member for the unicast connection. After that, UE#1 may use the third identifier as the source identifier and the source identifier allocated by the member UE for the unicast connection as the destination identifier, and send its corresponding AS configuration information to the member UE.
  • the method may also include:
  • S730 UE#1 sends first AS configuration information to UE#2.
  • the method may further include: UE#1 sending second AS configuration information to UE#2.
  • the method may further include: UE#2 uses the fourth identifier as the source identifier and the third identifier as the destination identifier, and sends the third AS configuration information to UE#1.
  • the UE can establish a unicast connection in the process of establishing a packet, thereby achieving the purpose of transmitting AS configuration information.
  • the AS configuration information involved in this article is not limited to being transmitted by the method described above.
  • the AS configuration information involved in this article can also be transmitted in other reasonable ways.
  • the UE can learn the resources for HARQ feedback when initiating multicast communication to other UEs.
  • resources used for HARQ feedback are collectively referred to as HARQ feedback resources.
  • the HARQ feedback resources hereinafter mainly refer to time-frequency resources.
  • UE#1 multicast data Take UE#1 multicast data as an example.
  • the target packet such as UE#2
  • UE#2 can correctly extract the media access control protocol data unit sent by UE#2 from the TB ( media access control protocol data unit, MAC PDU)
  • the corresponding HARQ feedback resource is used to feed back an acknowledgement (ACK) to UE#1.
  • ACK acknowledgement
  • UE#2 receives the TB sent by UE#1 but fails to correctly decode the MAC PDU, it will use the corresponding HARQ feedback resource to send a negative acknowledgement (NACK) to UE#1.
  • NACK negative acknowledgement
  • Another possibility is that UE#2 does not receive any signal, and UE#2 will not use the corresponding HARQ feedback resource to send any information to UE#1.
  • UE#1 after sending TB, if UE#2 uses the corresponding HARQ feedback resource to feed back ACK, it is determined that the MAC PDU has been sent successfully, and the MAC PDU is discarded or deleted, and then Initiate the transmission of new data; if the NACK fed back by UE#2 using the corresponding HARQ feedback resource is received, the transmission of the TB is determined to have failed, if the number of retransmissions of the MAC PDU corresponding to the TB has not reached the maximum number, or if the TB corresponds to If the MAC PDU sending timer has not expired, UE#1 retransmits the MAC PDU; if UE#1 does not receive ACK or NACK on the corresponding HARQ feedback resource, it is considered as a transmission failure, which is equivalent to receiving To NACK, similarly, if the number of retransmissions of the MAC PDU has not reached the maximum number, or if the transmission timer of the MAC P
  • any unicast connection whether it is the unicast connection established for multicast communication mentioned above or the unicast connection established due to service triggering, in order to ensure the reliability of communication, it is necessary to monitor the unicast link.
  • unicast link monitoring if there is always a situation between UE#1 and UE#2 that the peer UE cannot receive or can not resolve the sending data, it should be determined that the unicast link has failed.
  • this application also provides a method for an originating UE to monitor a unicast link, including:
  • the originating UE maintains a counter N:
  • the initial value of the counter N is 0;
  • the counter is reset to zero
  • the originating UE will maintain a counter for each unicast connection, and the counters are independent of each other.
  • the specific value of the counter can be configured by the base station through RRC signaling or broadcast messages, configured by the core network, built in the UE chip, or built in the subscriber identification module (SIM)
  • SIM subscriber identification module
  • the receiving end UE does not receive the data sent by the originating UE. Accordingly, the receiving end UE will not use the corresponding HARQ feedback resource to feed back any information. Accordingly, the originating UE will not receive ACK or NACK. Because the originating UE knows the HAQR feedback resource corresponding to the data sent this time, when the originating UE does not receive an ACK or NACK on the HARQ feedback resource corresponding to the data sent this time, it will be treated as a NACK received, and the corresponding counter Also need to add 1. At this time, the complete flow of the originating UE monitoring the unicast link is as follows:
  • the initial value of the counter N is 0;
  • the counter is increased by 1;
  • the counter is reset to zero
  • the UE sending data on the unicast link may be irregular, that is, there may be a long time interval between the two data transmissions. In this case, if the counter continues to be maintained, there may be a possibility of manslaughter. Because the intermediate interval is longer, the channel is almost restored later. Therefore, consider introducing a concept of valid time for the counter, and the valid time can correspond to a timer T. Combined with the previous scenario, the complete flow of the originating UE monitoring the unicast link at this time is as follows:
  • the initial value of the counter N is 0;
  • the counter is increased by 1;
  • the condition for finally determining the failure of the unicast connection includes: the counter N reaches the threshold value and the timer T is still running, which can also be understood as the counter N reaches the threshold value before the timing of the T timeout.
  • the value of the timer T can be configured by the base station through RRC signaling or broadcast messages, configured by the core network, built in the UE chip, or built in the SIM card. It can also be fixed.
  • radio link failure (RLF) determination based on HARQ feedback is applicable to any unicast connection scenario, and is not limited to the unicast connection involving multicast mentioned in the foregoing.
  • User plane processing includes: stopping the transmission of the unicast connection. Releasing the sending buffer of the unicast connection may specifically include at least one of a source request (SR) SR to be sent, a buffer status report (BSR) BSR, and data.
  • SR source request
  • BSR buffer status report
  • AS can indicate to the upper layer, and the upper layer can be the V2X layer or the application layer.
  • the AS When the AS indicates to the V2X layer, it will further indicate the identity of the unicast connection.
  • the V2X layer can further initiate a unicast connection release process and instruct the AS, and the AS releases the corresponding AS configuration of the unicast connection accordingly. If the UE is connected, it will update the sidelink UE information to the base station.
  • the AS can also directly release the AS configuration and indicate to the V2X layer.
  • the indication to the application layer may be that the AS indicates to the application layer through the V2X layer to indicate that the sidelink is not available for the unicast service.
  • the UE should not wait for recovery all the time, that is, a recovery time needs to be limited. Therefore, consider the timer T1, which is maintained for each unicast connection.
  • the timer T1 of the unicast connection is started; if the unicast connection is restored, T1 is stopped. If the timer T1 expires, the unicast connection failure/recovery failure is declared.
  • the specific criteria for resuming unicast connection can be that the UE monitors the appropriate resource pool (the resource pool can be limited to the original resource pool, or it can also be the original resource pool), or the UE receives the base station’s reconfiguration message including The identifier of the unicast connection, or a new resource pool.
  • the actions performed are as described above, including user plane processing and control plane processing.
  • the head UE sends the AS configuration to the member UE after the unicast connection is established.
  • the sending UE sends an RRC message on the sidelink to the receiving UE.
  • the RRC message includes the AS configuration.
  • the receiving UE may not be able to perform the configuration.
  • the receiving UE can send a configuration failure message to the sending UE, but sometimes the failure message cannot be sent.
  • the originating UE maintains a timer T2 by itself, and determines the configuration failure based on the timer. Among them, the timer T2 is one for each unicast connection.
  • the RRC entity When the RRC entity generates a sidelink RRC message and sends it to the bottom layer of RRC, it starts timer T2. If the RRC entity receives a recovery completion message from the peer UE, it stops the timer. If the timer expires, it is determined that the configuration of the unicast connection has failed.
  • the behavior after determining that the configuration of the unicast connection fails is similar to the processing after the RLF mentioned above. The only difference is that if an instruction is sent to the base station, the specific reason for the instruction is different.
  • an embodiment of the present application also provides a corresponding communication device, and the communication device includes a module or unit for executing the corresponding module or unit of the foregoing embodiment.
  • the module or unit may be software or hardware, or a combination of software and hardware.
  • FIG. 8 shows a schematic diagram of the structure of a communication device.
  • the device 800 may be a network device, a terminal device, a chip, a chip system, or a processor that supports the network device to implement the above method, or a chip, a chip system, or a chip that supports the terminal device to implement the above method. Or processor, etc.
  • the device can be used to implement the method described in the foregoing method embodiment, and for details, please refer to the description in the foregoing method embodiment.
  • the device 800 may include one or more processors 801, and the processor 801 may also be referred to as a processing unit, which may implement certain control functions.
  • the processor 801 may be a general-purpose processor or a special-purpose processor. For example, it can be a baseband processor or a central processing unit.
  • the baseband processor can be used to process communication protocols and communication data
  • the central processor can be used to control communication devices (such as base stations, baseband chips, terminals, terminal chips, DU or CU, etc.), execute software programs, and process Software program data.
  • the processor 801 may also store instructions and/or data 803, and the instructions and/or data 803 may be executed by the processor, so that the apparatus 800 executes the above method embodiments. Described method.
  • the processor 801 may include a transceiver unit for implementing receiving and sending functions.
  • the transceiver unit may be a transceiver circuit, or an interface, or an interface circuit.
  • the transceiver circuits, interfaces, or interface circuits used to implement the receiving and sending functions can be separate or integrated.
  • the foregoing transceiver circuit, interface, or interface circuit can be used for code/data reading and writing, or the foregoing transceiver circuit, interface, or interface circuit can be used for signal transmission or transmission.
  • the device 800 may include a circuit, which may implement the sending or receiving or communication functions in the foregoing method embodiments.
  • the device 800 may include one or more memories 802, on which instructions 804 may be stored, and the instructions may be executed on the processor, so that the device 800 executes the foregoing method embodiments. Described method.
  • data may also be stored in the memory.
  • instructions and/or data may also be stored in the processor.
  • the processor and memory can be provided separately or integrated together. For example, the corresponding relationship described in the foregoing method embodiment may be stored in a memory or in a processor.
  • the device 800 may further include a transceiver 805 and/or an antenna 806.
  • the processor 801 may be referred to as a processing unit, and controls the device 800.
  • the transceiver 805 may be referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., for implementing the transceiver function.
  • the processor and transceiver described in this application can be implemented in integrated circuit (IC), analog IC, radio frequency integrated circuit RFIC, mixed signal IC, application specific integrated circuit (ASIC), printed circuit board ( printed circuit board, PCB), electronic equipment, etc.
  • the processor and transceiver can also be manufactured using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), nMetal-oxide-semiconductor (NMOS), and P-type Metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (Bipolar Junction Transistor, BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.
  • CMOS complementary metal oxide semiconductor
  • NMOS nMetal-oxide-semiconductor
  • PMOS bipolar junction transistor
  • BiCMOS bipolar CMOS
  • SiGe silicon germanium
  • GaAs gallium arsenide
  • the device described in the above embodiment may be a network device or a terminal device, but the scope of the device described in this application is not limited to this, and the structure of the device may not be limited by FIG. 8.
  • the device can be a standalone device or can be part of a larger device.
  • the device may be:
  • the IC collection may also include storage components for storing data and/or instructions;
  • ASIC such as modem (MSM)
  • FIG. 9 provides a schematic structural diagram of a terminal device.
  • the terminal device 900 includes a processor, a memory, a control circuit, an antenna, and an input and output device.
  • the processor is mainly used to process the communication protocol and communication data, and to control the entire terminal, execute the software program, and process the data of the software program.
  • the memory is mainly used to store software programs and data.
  • the radio frequency circuit is mainly used for the conversion of baseband signal and radio frequency signal and the processing of radio frequency signal.
  • the antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • 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.
  • the processor can read the software program in the storage unit, parse and execute the instructions of the software program, and process the data of the software program.
  • the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit processes the baseband signal to obtain a radio frequency signal and sends the radio frequency signal out in the form of electromagnetic waves through the antenna. .
  • the radio frequency circuit receives the radio frequency signal through the antenna, the radio frequency signal is further converted into a baseband signal, and the baseband signal is output to the processor, and the processor converts the baseband signal into data and performs processing on the data. deal with.
  • FIG. 9 only shows a memory and a processor. In actual terminal equipment, there may be multiple processors and memories.
  • the memory may also be referred to as a storage medium or a storage device, etc., which is not limited in the embodiment of the present invention.
  • the processor may include a baseband processor and a central processing unit.
  • the baseband processor is mainly used to process communication protocols and communication data.
  • the central processing unit is mainly used to control the entire terminal device and execute Software program, processing the data of the software program.
  • the processor in FIG. 9 integrates the functions of the baseband processor and the central processing unit.
  • the baseband processor and the central processing unit may also be independent processors, which are interconnected by technologies such as buses.
  • the terminal device may include multiple baseband processors to adapt to different network standards, the terminal device may include multiple central processors to enhance its processing capabilities, and various components of the terminal device may be connected through various buses.
  • the baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip.
  • the central processing unit can also be expressed as a central processing circuit or a central processing chip.
  • the function of processing the communication protocol and communication data can be built in the processor, or can be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.
  • the antenna and the control circuit with the transceiving function can be regarded as the transceiving unit 911 of the terminal device 900, and the processor with the processing function can be regarded as the processing unit 912 of the terminal device 900.
  • the terminal device 900 includes a transceiver unit 911 and a processing unit 912.
  • the transceiver unit may also be referred to as a transceiver, a transceiver, a transceiver, and so on.
  • the device for implementing the receiving function in the transceiver unit 911 can be regarded as the receiving unit, and the device for implementing the sending function in the transceiver unit 911 as the sending unit, that is, the transceiver unit 911 includes a receiving unit and a sending unit.
  • the receiving unit may also be called a receiver, a receiver, a receiving circuit, etc.
  • the sending unit may be called a transmitter, a transmitter, or a transmitting circuit, etc.
  • the foregoing receiving unit and sending unit may be an integrated unit or multiple independent units.
  • the above-mentioned receiving unit and sending unit may be in one geographic location, or may be scattered in multiple geographic locations.
  • the present application provides an apparatus 1000.
  • the device may be a terminal device or a component of a terminal device (for example, an integrated circuit, a chip, etc.).
  • the device may also be a network device, or a component of a network device (for example, an integrated circuit, a chip, etc.).
  • the device may also be another communication module, which is used to implement the method in the method embodiment of the present application.
  • the apparatus 1000 may include: a processing module 1002 (processing unit).
  • it may also include a transceiving module 1001 (transceiving unit) and a storage module 1003 (storage unit).
  • one or more modules as shown in FIG. 10 may be implemented by one or more processors, or by one or more processors and memories; or by one or more processors It can be implemented with a transceiver; or implemented by one or more processors, memories, and transceivers, which is not limited in the embodiment of the present application.
  • the processor, memory, and transceiver can be set separately or integrated.
  • the device has the function of realizing the terminal device described in the embodiment of this application.
  • the device includes a terminal device to execute the module or unit or means corresponding to the step related to the terminal device described in the embodiment of this application.
  • the function Or a unit or means (means) can be implemented by software, or by hardware, or by hardware executing corresponding software, or by a combination of software and hardware.
  • a unit or means can be implemented by software, or by hardware, or by hardware executing corresponding software, or by a combination of software and hardware.
  • the device has the function of implementing the network device described in the embodiment of this application.
  • the device includes the module or unit or means corresponding to the network device executing the steps involved in the network device described in the embodiment of this application.
  • the functions or units or means (means) can be realized by software, or by hardware, or by hardware executing corresponding software, or by a combination of software and hardware.
  • the processor in the embodiment of the present application may be an integrated circuit chip with signal processing capability.
  • the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software.
  • the aforementioned processor may be a general-purpose processor, a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (ASIC), a field programmable gate array (field programmable gate array, FPGA) or other Programming logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • the memory in the embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electronic Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be random access memory (RAM), which is used as an external cache.
  • RAM random access memory
  • static random access memory static random access memory
  • dynamic RAM dynamic random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous dynamic random access memory
  • double data rate synchronous dynamic random access memory double data rate SDRAM, DDR SDRAM
  • enhanced synchronous dynamic random access memory enhanced SDRAM, ESDRAM
  • serial link DRAM SLDRAM
  • direct rambus RAM direct rambus RAM
  • the present application also provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a computer, the function of any of the foregoing method embodiments is realized.
  • This application also provides a computer program product, which, when executed by a computer, realizes the functions of any of the foregoing method embodiments.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (for example, a solid state disk, SSD)) etc.
  • system and “network” in this article are often used interchangeably in this article.
  • network in this article is only an association relationship describing associated objects, which means that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, exist alone B these three situations.
  • At least one of or “at least one of” herein means all or any combination of the listed items, for example, “at least one of A, B and C", It can mean: A alone exists, B alone exists, C exists alone, A and B exist at the same time, B and C exist at the same time, and there are six situations of A, B and C at the same time.
  • At least one in this context means one or more.
  • Multiple means two or more.
  • B corresponding to A means that B is associated with A, and B can be determined according to A.
  • determining B according to A does not mean that B is determined only according to A, and B can also be determined according to A and/or other information.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • each unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program code .

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

本申请提供了一种通过方法和通信装置，能够通过侧行链路信令传输AS配置信息。具体地，第一终端设备获取第二终端设备为组播通信分配的源标识，组播通信是针对目标分组的通信，第一终端设备和第二终端设备属于目标分组；第一终端设备的V2X层生成第一侧行链路信令，并向第一终端设备的AS发送第一侧行链路信令、第一标识和组标识，第一标识为第一终端设备为组播通信分配的源标识，组标识用于标识目标分组；AS以第一标识为源标识，以组标识为目的标识，发送第一侧行链路信令。

Description

通信方法和通知装置
本申请要求于2019年08月16日提交中国专利局、申请号为201910760892.8、申请名称为“通信方法和通知装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，并且更具体地，涉及一种通信方法和通信装置。
背景技术
新无线(new radio，NR)车到所有(vehicle to everything，V2X)支持组播通信。在一个分组内，可能存在传输接入层(access stratum，AS)的相关信息的需求，即，可能存在不是应用层(application，APP)层触发的信息传输的场景。比如，组内的一个用户设备(user equipment，UE)组播数据后，其他UE需要进行混合自动重传请求(hybrid automatic repeat request，HARQ)反馈。此时，组内的各UE需要获知进行HARQ反馈的资源。根据现有技术，单播连接只能由APP层触发，而没有AS触发的单播连接或者组播的方案，因此组内各UE无法获知进行HARQ的资源。
发明内容
本申请提供一种通信方法，能够基于与分组相关的信息，通过侧行链路信令传输AS配置信息。
第一方面，提供了一种通过方法，包括：第一终端设备获取第二终端设备为组播通信分配的源标识，该组播通信是针对目标分组的通信，第一终端设备和第二终端设备属于该目标分组；第一终端设备的V2X层生成第一侧行链路信令；该V2X层向第一终端设备的AS发送该第一侧行链路信令、第一标识和组标识，该第一标识为第一终端设备为该组播通信分配的源标识，该组标识用于标识该目标分组；该AS以该第一标识为源标识，以该组标识为目的标识，发送该第一侧行链路信令。
在一种方式中，该第一侧行链路信令可以包括第二终端设备为组播通信分配的源标识和第二终端设备的接入层AS配置信息。
从而，基于该方案，第一终端设备可以基于自己为组播通信分配的源标识以及目标分组的组标识，发送侧行链路信令，通过该侧行链路信令传输第二终端设备的AS配置信息。
在另一种方式中，该第一侧行链路信令可以包括目标分组内各终端设备为组播通信分配的源标识和各终端设备的接入层AS配置信息。
从而，基于该方案，对于目标分组内任一终端设备，都可以或者其他终端设备的AS配置信息。
在又一种方式中，该第一侧行链路信令可以包括源标识列表，该源标识列表包括目标 分组中各终端设备为组播通信分配的源标识。第一源标识和第一源标识在源标识列表中的位置指示第一源标识对应的终端设备的AS配置信息，第一源标识为所述目标分组中任一终端设备为组播通信分配的源标识。也就是说，源标识列表中的任一源标识和该源标识在所述源标识列表中的位置用于该源标识对应的终端设备确定其对应的AS配置信息。
从而，基于该方案，对于目标分组内任一终端设备，都可以或者其他终端设备的AS配置信息。
结合第一方面，在第一方面的某些实现方式中，在第一终端设备的V2X层生成第一侧行链路信令之前，该方法还包括：第一终端设备的AS向该V2X层发送配置信息，其中，第一终端设备的V2X层生成第一侧行链路信令，包括：该V2X层根据该配置信息，生成该第一侧行链路信令。
其中，该配置信息包括该组标识。该配置信息还可以包括：第二终端设备为组播通信分配的源标识和第二终端设备的AS配置信息，或者，目标分组内各终端设备为组播通信分配的源标识和各终端设备的接入层AS配置信息，或者源标识列表。
结合第一方面，在第一方面的某些实现方式中，第二终端设备的AS配置信息包括第一AS配置信息，第一AS配置信息用于第二终端设备确定第一反馈资源，该第一反馈资源用于第二终端设备对第一终端设备发起的该组播通信进行混合自动重传请求HARQ反馈。
基于该方案，第二终端设备可以确定对第一终端设备发起的该组播通信进行混合自动重传请求HARQ反馈的资源。
结合第一方面，在第一方面的某些实现方式中，第一AS配置信息还用于第二终端设备确定至少一个第二反馈资源，该至少一个第二反馈资源与该目标分组中除第二终端设备以外的终端设备一一对应，任一第二反馈资源用于第二终端设备对该第二反馈资源对应的终端设备发起的该组播通信进行HARQ反馈。
基于该方案，第二终端设备可以确定对目标分组中任一终端设备发起的该组播通信进行混合自动重传请求HARQ反馈的资源。
结合第一方面，在第一方面的某些实现方式中，第二终端设备的AS配置信息还包括至少一个第二AS配置信息，该至少一个第二AS配置信息与该目标分组中除第二终端设备以外的终端设备一一对应，第三终端设备对应的第二AS配置信息用于该第三终端设备确定至少一个第三反馈资源，该至少一个第三反馈资源与该目标分组中除该第三终端设备以外的终端设备一一对应，任一第三反馈资源用于该第三终端设备对该第三反馈资源对应的终端设备发起的该组播通信进行HARQ反馈，该第三终端设备为该目标分组中除第二终端设备以外的任一终端设备。
基于该方案，第二终端设备可以确定目标分组中任一终端设备对其他终端设备发起的该组播通信进行混合自动重传请求HARQ反馈的资源。
结合第一方面，在第一方面的某些实现方式中，该方法还可以包括：第一终端设备接收第二终端设备发送的第二侧行链路信令，该第二侧行链路信令包括第三AS配置信息，该第三AS配置信息用于第一终端设备确定第四反馈资源，该第四反馈资源用于第一终端设备对第二终端设备发起的该组播通信进行混合自动重传请求HARQ反馈。
基于该方案，第一终端设备可以确定对第二终端设备发起的组播通信进行HARQ反 馈的资源。
可选地，第三AS配置信息还用于第一终端设备确定对目标分组中其他终端设备发起的组播通信进行HARQ反馈的资源。
结合第一方面，在第一方面的某些实现方式中，在第一终端设备获取目标分组中各终端设备为组播通信分配的源标识之前，该方法还包括：
第一终端设备以该第一标识为源标识，以目标业务类型对应的默认标识为目的标识，广播分组建立请求消息，其中，该分组建立请求消息用于请求建立该目标分组，该分组建立请求消息包括该组标识和该目标分组在应用层的信息；
第一终端设备接收该目标分组中除第一终端设备以外的各终端设备反馈的分组建立接受消息，其中，任一终端设备对应的该分组建立请求接受消息的发送以该终端设备为该组播通信分配的源标识为源标识，以该组标识为目的标识。
基于该方案，可以建立目标分组，并且第一终端设备可以获得目标分组内各终端设备为组播通信分配的源标识。
第二方面，提供了一种通信方法，包括：第二终端设备接收第一终端设备发送的第一侧行链路信令。
在一种方式中，该第一侧行链路信令可以包括第二终端设备为组播通信分配的源标识和第二终端设备的接入层AS配置信息。本申请中，该组播通信是针对目标分组的通信，第一终端设备和第二终端设备属于该目标分组。
基于该方案，第一终端设备可以基于自己为组播通信分配的源标识以及目标分组的组标识，发送侧行链路信令，通过该侧行链路信令传输第二终端设备的AS配置信息。
在另一种方式中，该第一侧行链路信令可以包括目标分组内各终端设备为组播通信分配的源标识和各终端设备的接入层AS配置信息。
基于该方案，对于目标分组内任一终端设备，都可以或者其他终端设备的AS配置信息。
在又一种方式中，该第一侧行链路信令可以包括源标识列表，该源标识列表包括目标分组中各终端设备为组播通信分配的源标识。第一源标识和第一源标识在源标识列表中的位置指示第一源标识对应的终端设备的AS配置信息，第一源标识为所述目标分组中任一终端设备为组播通信分配的源标识。也就是说，源标识列表中的任一源标识和该源标识在所述源标识列表中的位置用于该源标识对应的终端设备确定其对应的AS配置信息。
基于该方案，对于目标分组内任一终端设备，都可以或者其他终端设备的AS配置信息。
结合第二方面，在第二方面的某些实现方式中，第二终端设备接收第一终端设备发送的第一侧行链路信令，包括：第二终端设备的V2X层接收该第一侧行链路信令；
以及，该方法还包括：该V2X层向第二终端设备的接入层AS发送第二终端设备为组播通信分配的源标识和第二终端设备的AS配置信息。
结合第二方面，在第二方面的某些实现方式中，第二终端设备的AS配置信息包括第一AS配置信息；以及，该方法还包括：该AS根据第一AS配置信息，确定第一反馈资源，该第一反馈资源用于第二终端设备对第一终端设备发起的该组播通信进行混合自动重传请求HARQ反馈。
结合第二方面，在第二方面的某些实现方式中，该AS根据第一AS配置信息，确定至少一个第二反馈资源，该至少一个第二反馈资源与该目标分组中除第二终端设备以外的终端设备一一对应，任一第二反馈资源用于第二终端设备对该第二反馈资源对应的终端设备发起的该组播通信进行HARQ反馈。
结合第二方面，在第二方面的某些实现方式中，第二终端设备的AS配置信息还包括至少一个第二AS配置信息；以及，该方法还包括：该AS根据该至少一个第二AS配置信息，确定该目标分组中除第二终端设备以外的任一终端设备对应的反馈资源，其中，第三终端设备的反馈资源包括至少一个第三反馈资源，该至少一个第三反馈资源与该目标分组中除该第三终端设备以外的终端设备一一对应，任一第三反馈资源用于该第三终端设备对该第三反馈资源对应的终端设备发起的该组播通信进行HARQ反馈，该第三终端设备为该目标分组中除第二终端设备以外的任一终端设备。
结合第二方面，在第二方面的某些实现方式中，该方法还包括：第二终端设备向第一终端设备发送第二侧行链路信令，该第二侧行链路信令包括第三AS配置信息；
第二终端设备根据该第三AS配置信息，确定第四反馈资源，该第四反馈资源用于第一终端设备对第二终端设备发起的该组播通信进行混合自动重传请求HARQ反馈。
结合第二方面，在第二方面的某些实现方式中，该第一侧行链路信令还包括该目标分组中除第二终端设备以外的其他各终端设备分别为该组播通信分配的源标识以及该各终端设备的AS配置信息。
结合第二方面，在第二方面的某些实现方式中，在第二终端设备接收第一终端设备发送的第一侧行链路信令之前，该方法还包括：第二终端设备以该第一标识为源标识，以目标业务类型对应的默认标识为目的标识，接收第一终端设备广播的分组建立请求消息，其中，该分组建立请求消息用于请求建立该目标分组，该分组建立请求消息包括组标识和该目标分组在应用层的信息，该组标识用于标识该目标分组；第二终端设备以第二标识为源标识，为该组标识为目的标识，向第一终端设备发送分组建立接受消息，该第二标识为第二终端设备为该组播通信分配的源标识。
第三方面，提供了一种通信方法，包括：第一终端设备获取第一标识和第二标识，该第一标识为第一终端设备为组播通信分配的源标识，该第二标识为第二终端设备为该组播通信分配的源标识，该组播通信是针对目标分组的通信，第一终端设备和第二终端设备属于该目标分组；第一终端设备以该第一标识为源标识，该第二标识为目的标识，向第二终端设备发送第一接入层AS配置信息。
本申请提供的通信方法，第一终端设备可以基于第一终端设备为组播通信分配的源标识和第二终端设备为组播通信分配的源标识，向第二终端设备发送AS配置信息，从而实现传输AS配置信息的目的。
结合第三方面，在第三方面的某些实现方式中，第一AS配置信息用于第二终端设备确定第一反馈资源，该第一反馈资源用于第二终端设备对第一终端设备发起的该组播通信进行混合自动重传请求HARQ反馈。
结合第三方面，在第三方面的某些实现方式中，第一AS配置信息还用于第二终端设备确定至少一个第二反馈资源，该至少一个第二反馈资源与该目标分组中除第二终端设备以外的终端设备一一对应，任一第二反馈资源用于第二终端设备对该第二反馈资源对应的 终端设备发起的该组播通信进行HARQ反馈。
结合第三方面，在第三方面的某些实现方式中，该方法还包括：第一终端设备向第二终端设备发送至少一个第二AS配置信息，其中，该至少一个第二AS配置信息与该目标分组中除第二终端设备以外的终端设备一一对应，第三终端设备对应的第二AS配置信息用于该第三终端设备确定至少一个第三反馈资源，该至少一个第三反馈资源与该目标分组中除该第三终端设备以外的终端设备一一对应，任一第三反馈资源用于该第三终端设备对该第三反馈资源对应的终端设备发起的该组播通信进行HARQ反馈，该第三终端设备为该目标分组中除第二终端设备以外的任一终端设备。
结合第三方面，在第三方面的某些实现方式中，该方法还包括：第一终端设备接收第二终端设备发送的第三AS配置信息。
结合第三方面，在第三方面的某些实现方式中，该第三AS配置信息用于第一终端设备确定第四反馈资源，该第四反馈资源用于第一终端设备对第二终端设备发起的该组播通信进行混合自动重传请求HARQ反馈。
结合第三方面，在第三方面的某些实现方式中，在第一终端设备获取第一标识和第二标识之前，该方法还包括：
第一终端设备以该第一标识为源标识，以目标业务类型对应的默认标识为目的标识，广播分组建立请求消息，其中，该目标业务类型为发起建立该目标分组的业务类型，该分组建立请求消息用于请求建立该目标分组，该分组建立请求消息包括第一终端设备为该目标分组分配的组标识和该目标分组在应用层的信息；
第一终端设备接收第二终端设备反馈的分组建立接受消息，其中，该分组建立请求接受消息的发送以该第二标识为源标识，以该组标识为目的标识。
基于该方案，第一终端设备可以建立目标分组，并且可以获得目标分组内各终端设备为组播通信分配的源标识。
第四方面，提供了一种通信方法，包括：第二终端设备以第一标识为源标识，以第二标识为目的标识，接收第一终端设备发送的第一接入层AS配置信息，其中，该第一标识为第一终端设备为组播通信分配的源标识，该第二标识为第二终端设备为该组播通信分配的源标识，该组播通信是针对目标分组的通信，第一终端设备和第二终端设备属于该目标分组。
根据本申请提供的通信方法，第二终端设备可以基于第一终端设备和第二终端设备为组播通信分配的源标识，获取AS配置信息。
结合第四方面，在第四方面的某些实现方式中，第二终端设备根据第一AS配置信息，确定第一反馈资源，该第一反馈资源用于第二终端设备对第一终端设备发起的该组播通信进行混合自动重传请求HARQ反馈。
结合第四方面，在第四方面的某些实现方式中，该方法还包括：第二终端设备根据第一AS配置信息，确定至少一个第二反馈资源，该至少一个第二反馈资源与该目标分组中除第二终端设备以外的终端设备一一对应，任一第二反馈资源用于第二终端设备对该第二反馈资源对应的终端设备发起的该组播通信进行HARQ反馈。
结合第四方面，在第四方面的某些实现方式中，该方法还包括：第二终端设备以该第一标识为源标识，以该第二标识为目的标识，接收第一终端设备发送的至少一个第二AS 配置信息；第二终端设备根据该第二AS配置信息，确定该目标分组中除第二终端设备以外的任一终端设备对应的反馈资源，其中，第三终端设备的反馈资源包括至少一个第三反馈资源，该至少一个第三反馈资源与该目标分组中除该第三终端设备以外的终端设备一一对应，任一第三反馈资源用于该第三终端设备对该第三反馈资源对应的终端设备发起的该组播通信进行HARQ反馈，该第三终端设备为该目标分组中除第二终端设备以外的任一终端设备。
结合第四方面，在第四方面的某些实现方式中，该方法还包括：第二终端设备以该第二标识为源标识，以该第一标识为目的标识，向第一终端设备接收发送第三AS配置信息。
结合第四方面，在第四方面的某些实现方式中，该第三AS配置信息用于第一终端设备确定第四反馈资源，该第四反馈资源用于第一终端设备对第二终端设备发起的该组播通信进行混合自动重传请求HARQ反馈。
结合第四方面，在第四方面的某些实现方式中，在第二终端设备接收第一终端设备发送的第一接入层AS配置信息之前，该方法还包括：第二终端设备以该第一标识为源标识，以目标业务类型对应的默认标识为目的标识，接收第一终端设备广播的分组建立请求消息，其中，该目标业务类型为发起建立该目标分组的业务类型，该分组建立请求消息用于请求建立该目标分组，该分组建立请求消息包括组标识和该目标分组在应用层的信息，该组标识用于标识该目标分组；第二终端设备以第二标识为源标识，为该组标识为目的标识，向第一终端设备发送分组建立接受消息。
第五方面，提供了一种通信方法，包括：第一终端设备获取第二标识，该第二标识为第二终端设备为组播通信分配的源标识，该组播通信是针对目标分组的通信，该目标分组包括第一终端设备和第二终端设备；第一终端设备的V2X层生成单播连接建立请求消息，该单播连接建立请求消息包括该第二标识；该V2X层向第一终端设备的接入层AS发送该单播连接建立请求消息、第三标识和目标业务类型对应的默认标识，该第三标识为第一终端设备为该单播连接建立请求消息所请求建立的单播连接分配的源标识，该目标业务类型为发起建立该目标分组的业务类型；该AS以该第三标识为源标识，以该目标业务类型对应的默认标识为目的标识，广播该单播连接建立请求消息；第一终端设备接收第二终端设备发送的单播连接建立响应消息，该单播连接建立响应消息的发送以第四标识为源标识，以该第三标识为目的标识，该第四标识为第二终端设备为该单播连接分配的源标识。
根据本申请提供的方法，第一终端设备和第二终端设备可以基于与目标分组相关的信息建立单播连接，从而可以基于该单播连接实现传输AS配置信息的目的。
结合第五方面，在第五方面的某些实现方式中，在该V2X层生成单播连接建立请求消息之前，该方法还包括：该AS向该V2X层发送指示信息，该指示信息用于触发该V2X层建立该单播连接，该指示信息包括该第二标识；其中，第一终端设备的V2X层生成单播连接建立请求消息，包括：该V2X层根据该指示信息，生成该单播连接建立请求消息。
也就是说，第一终端设备和第二终端设备之间的单播连接是AS触发建立的。
结合第五方面，在第五方面的某些实现方式中，该方法还包括：第一终端设备以该第三标识为源标识，以该第四标识为目的标识，向第二终端设备发送第一AS配置信息。
根据该方法，第一终端设备可以通过与第二终端设备之间建立的单播连接，传输AS配置信息。
结合第五方面，在第五方面的某些实现方式中，第一AS配置信息用于第二终端设备确定第一反馈资源，该第一反馈资源用于第二终端设备对第一终端设备发起的该组播通信进行混合自动重传请求HARQ反馈。
结合第五方面，在第五方面的某些实现方式中，第一AS配置信息还用于第二终端设备确定至少一个第二反馈资源，该至少一个第二反馈资源与该目标分组中除第二终端设备以外的终端设备一一对应，任一第二反馈资源用于第二终端设备对该第二反馈资源对应的终端设备发起的该组播通信进行HARQ反馈。
结合第五方面，在第五方面的某些实现方式中，该方法还包括：
第一终端设备以该第三标识为源标识，以该第四标识为目的标识，向第二终端设备发送至少一个第二AS配置信息，
其中，该至少一个第二AS配置信息与该目标分组中除第二终端设备以外的终端设备一一对应，第三终端设备对应的第二AS配置信息用于该第三终端设备确定至少一个第三反馈资源，该至少一个第三反馈资源与该目标分组中除该第三终端设备以外的终端设备一一对应，任一第三反馈资源用于该第三终端设备对该第三反馈资源对应的终端设备发起的该组播通信进行HARQ反馈，该第三终端设备为该目标分组中除第二终端设备以外的任一终端设备。
结合第五方面，在第五方面的某些实现方式中，该方法还包括：第一终端设备接收第二终端设备发送的第三AS配置信息。
结合第五方面，在第五方面的某些实现方式中，该第三AS配置信息用于第一终端设备确定第二反馈资源，该第二反馈资源用于第一终端设备对第二终端设备发起的该组播通信进行混合自动重传请求HARQ反馈。
结合第五方面，在第五方面的某些实现方式中，在第一终端设备获取第二标识之前，该方法还包括：第一终端设备以第一标识为源标识，以目标业务类型对应的默认标识为目的标识，广播分组建立请求消息，其中，该第一标识为第一终端设备为该组播通信分配的源标识，该目标业务类型为发起建立该目标分组的业务类型，该分组建立请求消息用于请求建立该目标分组，该分组建立请求消息包括第一终端设备为该目标分组分配的组标识和该目标分组在应用层的信息；第一终端设备接收第二终端设备反馈的分组建立接受消息，其中，该分组建立请求接受消息的发送以该第二标识为源标识，以该组标识为目的标识。
基于该方案，第一终端设备可以建立目标分组，并且第一终端设备可以获知目标分组内各终端设备为组播通信分配的源标识。
第六方面，提供了一种通信方法，包括：第二终端设备接收第一终端设备发送的单播连接建立请求消息；第二终端设备以第四标识为源标识，以第三标识为目的标识，向第一终端设备发送单播连接建立响应消息，该第三标识为第一终端设备为该单播连接建立请求消息所请求建立的单播连接分配的源标识，该第四标识为第二终端设备为该单播连接分配的源标识，第一终端设备和第二终端设备属于目标分组。
根据本申请提供的方法，第一终端设备和第二终端设备可以基于与目标分组相关的信息建立单播连接，从而可以基于该单播连接实现传输AS配置信息的目的。
结合第六方面，在第六方面的某些实现方式中，该方法还包括：第二终端设备以该第三标识为源标识，以该第四标识为目的标识，接收第一终端设备发送的第一AS配置信息。
结合第六方面，在第六方面的某些实现方式中，该方法还包括：第二终端设备根据第一AS配置信息，确定第一反馈资源，该第一反馈资源用于第二终端设备对第一终端设备发起的组播通信进行混合自动重传请求HARQ反馈，该组播通信是针对该目标分组的通信。
结合第六方面，在第六方面的某些实现方式中，第二终端设备根据第一AS配置信息，确定至少一个第二反馈资源，该至少一个第二反馈资源与该目标分组中除第二终端设备以外的终端设备一一对应，任一第二反馈资源用于第二终端设备对该第二反馈资源对应的终端设备发起的该组播通信进行HARQ反馈。
结合第六方面，在第六方面的某些实现方式中，该方法还包括：第二终端设备以该第一标识为源标识，以该第二标识为目的标识，接收第一终端设备发送的至少一个第二AS配置信息；第二终端设备根据该第二AS配置信息，确定该目标分组中除第二终端设备以外的任一终端设备对应的反馈资源，其中，第三终端设备的反馈资源包括至少一个第三反馈资源，该至少一个第三反馈资源与该目标分组中除该第三终端设备以外的终端设备一一对应，任一第三反馈资源用于该第三终端设备对该第三反馈资源对应的终端设备发起的该组播通信进行HARQ反馈，该第三终端设备为该目标分组中除第二终端设备以外的任一终端设备。
结合第六方面，在第六方面的某些实现方式中，该方法还包括：第二终端设备以该第四标识为源标识，以该第三标识为目的标识，向第一终端设备接收发送第三AS配置信息。
结合第六方面，在第六方面的某些实现方式中，该第三AS配置信息用于第一终端设备确定第四反馈资源，该第四反馈资源用于第一终端设备对第二终端设备发起的组播通信进行混合自动重传请求HARQ反馈，该组播通信是针对该目标分组的通信。
结合第六方面，在第六方面的某些实现方式中，在第二终端设备接收第一终端设备发送的单播连接建立请求消息之前，该方法还包括：第二终端设备以第一标识为源标识，以目标业务类型对应的默认标识为目的标识，接收第一终端设备广播的分组建立请求消息，其中，该目标业务类型为发起建立该目标分组的业务类型，该分组建立请求消息用于请求建立该目标分组，该分组建立请求消息包括组标识和该目标分组在应用层的信息，该组标识用于标识该目标分组；第二终端设备以第二标识为源标识，为该组标识为目的标识，向第一终端设备发送分组建立接受消息。
第七方面，提供了一种通信方法，包括：第一终端设备以第一标识为源标识，以目标业务类型对应的默认标识为目的标识，广播分组建立请求消息，其中，该第一标识为第一终端设备为组播通信分配的源标识，该组播通信是针对目标分组的通信，该目标业务类型为发起建立该目标分组的业务类型，该分组建立请求消息用于请求建立该目标分组，该分组建立请求消息包括第一终端设备为该目标分组分配的组标识、该目标分组在应用层的信息以及第三标识，该第三标识为第一终端设备为第一终端设备与该目标分组内的其他终端设备之间的单播连接分配的源标识；第一终端设备接收第二终端设备反馈的分组建立接受消息，其中，该分组建立请求接受消息的发送以第二标识为源标识，以该组标识为目的标识，该第二标识为第二终端设备为该组播通信分配的源标识，该分组建立接受消息包括第四标识，该第四标识为第二终端设备为第二终端设备与第一终端设备之间的单播连接分配的源标识。
根据本申请提供的通信方法，第一终端设备可以在建立分组的过程中，建立了与组内终端设备之间的单播连接，从而在建立单播连接后，能够实现传输AS配置信息的目的。
结合第七方面，在第七方面的某些实现方式中，该方法还包括：第一终端设备以该第三标识为源标识，以该第四标识为目的标识，向第二终端设备发送第一接入层AS配置信息。
根据该方法，第一终端设备可以通过与第二终端设备之间的单播连接，传输AS配置信息。
结合第七方面，在第七方面的某些实现方式中，第一AS配置信息用于第二终端设备确定第一反馈资源，该第一反馈资源用于第二终端设备对第一终端设备发起的该组播通信进行混合自动重传请求HARQ反馈。
结合第七方面，在第七方面的某些实现方式中，第一AS配置信息还用于第二终端设备确定至少一个第二反馈资源，该至少一个第二反馈资源与该目标分组中除第二终端设备以外的终端设备一一对应，任一第二反馈资源用于第二终端设备对该第二反馈资源对应的终端设备发起的该组播通信进行HARQ反馈。
结合第七方面，在第七方面的某些实现方式中，该方法还包括：第一终端设备以该第三标识为源标识，以该第四标识为目的标识，向第二终端设备发送至少一个第二AS配置信息，其中，该至少一个第二AS配置信息与该目标分组中除第二终端设备以外的终端设备一一对应，第三终端设备对应的第二AS配置信息用于该第三终端设备确定至少一个第三反馈资源，该至少一个第三反馈资源与该目标分组中除该第三终端设备以外的终端设备一一对应，任一第三反馈资源用于该第三终端设备对该第三反馈资源对应的终端设备发起的该组播通信进行HARQ反馈，该第三终端设备为该目标分组中除第二终端设备以外的任一终端设备。
结合第七方面，在第七方面的某些实现方式中，该方法还包括：第一终端设备接收第二终端设备发送的第三AS配置信息。
结合第七方面，在第七方面的某些实现方式中，该第三AS配置信息用于第一终端设备确定第二反馈资源，该第二反馈资源用于第一终端设备对第二终端设备发起的该组播通信进行混合自动重传请求HARQ反馈。
第八方面，提供了一种通信方法，包括：第二终端设备以目标业务类型对应的默认标识为目的标识，接收第一终端设备广播的分组建立请求消息，其中，第一终端设备和第二终端设备属于目标分组，该组播通信是针对目标分组的通信，该目标业务类型为发起建立该目标分组的业务类型，该分组建立请求消息用于请求建立该目标分组，该分组建立请求消息包括第一终端设备为该目标分组分配的组标识、该目标分组在应用层的信息以及第三标识，该第三标识为第一终端设备为第一终端设备与该目标分组内的其他终端设备之间的单播连接分配的源标识；第二终端设备以第二标识为源标识，以该组标识为目的标识，向第一终端设备发送分组建立接受消息，该第二标识为第二终端设备为该组播通信分配的源标识，该分组建立接受消息包括第四标识，该第四标识为第二终端设备为第二终端设备与第一终端设备之间的单播连接分配的源标识。
根据本申请提供的通信方法，第一终端设备可以在建立分组的过程中，建立了与组内终端设备之间的单播连接，从而在建立单播连接后，能够实现传输AS配置信息的目的。
结合第八方面，在第八方面的某些实现方式中，该方法还包括：第二终端设备以该第三标识为源标识，以该第四标识为目的标识，接收第一终端设备发送的第一接入层AS配置信息。
根据该方法，第一终端设备可以通过与第二终端设备之间的单播连接，传输AS配置信息。
结合第八方面，在第八方面的某些实现方式中，该方法还包括：第二终端设备根据第一AS配置信息，确定至少一个第二反馈资源，该至少一个第二反馈资源与该目标分组中除第二终端设备以外的终端设备一一对应，任一第二反馈资源用于第二终端设备对该第二反馈资源对应的终端设备发起的该组播通信进行HARQ反馈。
结合第八方面，在第八方面的某些实现方式中，该方法还包括：第二终端设备以该第三标识为源标识，以该第四标识为目的标识，接收第一终端设备发送的至少一个第二AS配置信息；第二终端设备根据该第二AS配置信息，确定该目标分组中除第二终端设备以外的任一终端设备对应的反馈资源，其中，第三终端设备的反馈资源包括至少一个第三反馈资源，该至少一个第三反馈资源与该目标分组中除该第三终端设备以外的终端设备一一对应，任一第三反馈资源用于该第三终端设备对该第三反馈资源对应的终端设备发起的该组播通信进行HARQ反馈，该第三终端设备为该目标分组中除第二终端设备以外的任一终端设备。
结合第八方面，在第八方面的某些实现方式中，该方法还包括：第二终端设备以该第四标识为源标识，以该第三标识为目的标识，向第一终端设备接收发送第三AS配置信息。
结合第八方面，在第八方面的某些实现方式中，该第三AS配置信息用于第一终端设备确定第四反馈资源，该第四反馈资源用于第一终端设备对第二终端设备发起的该组播通信进行混合自动重传请求HARQ反馈。
第九方面，提供了一种通信方法，包括：第一终端设备以第一标识为源标识，以目标业务类型对应的默认标识为目的标识，广播分组建立请求消息，
其中，所述第一标识为所述第一终端设备为组播通信分配的源标识，所述组播通信是针对目标分组的通信，所述目标业务类型为发起建立所述目标分组的业务类型，所述分组建立请求消息用于请求建立所述目标分组，所述分组建立请求消息包括所述第一终端设备为所述目标分组分配的组标识和所述目标分组在应用层的信息；
所述第一终端设备接收所述目标分组内的其他终端设备反馈的分组建立请求接受消息。
根据该方法，第一终端设备可以建立目标分组。
第十方面，提供了一种通信方法，包括：第二终端设备接收第一终端设备广播的分组建立请求消息，所述分组建立请求消息用于请求建立目标分组，所述分组建立请求消息包括所述第一终端设备的V2X层为所述目标分组分配的组标识和所述目标分组在应用层的信息；
所述第二终端设备以第二标识为源标识，以所述组标识为目的标识，向所述第一终端设备发送分组建立请求接受消息，所述第一标识为所述第一终端设备为组播通信分配的源标识，所述第二标识为所述第二终端设备为所述组播通信分配的源标识，所述组播通信是针对目标分组的通信。
根据该方法，第二终端设备可以加入目标分组。
第十一方面，提供了一种通信方法，包括：第一终端设备向第二终端设备发送AS配置信息，并启动所述第一终端设备与所述第二终端设备之间的单播连接关联的第一定时器；在所述第一定时器运行期间，若所述第一终端设备接收到所述第二终端设备发送的对所述AS配置信息的响应消息，所述第一终端设备停止所述第一定时器；或者，在所述第一定时器超时时，若所述第一终端设备未接收到所述第二终端设备发送的对所述AS配置信息的响应消息，所述第一终端设备确定基于所述AS配置信息的配置失败。
根据本申请提供的通信方法，通过引入与单播连接关联的定时器(即，第一定时器)，可以在第一终端设备未接收到第二终端设备发送的对所述AS配置信息的响应消息时，对与该单播连接相关的内容进行及时处理，避免业务长时间中断。
结合第十一方面，在第十一方面的某些实现方式中，所述启动所述第一终端设备与所述第二终端设备之间的单播连接关联的第一定时器，包括：所述第一终端设备在其RRC实体生成侧行链路RRC消息并发送给所述RRC实体的底层时，启动所述第一定时器，其中所述RRC消息包括所述AS配置信息。
应理解，RRC实体的底层是指RRC的下一层。
结合第十一方面，在第十一方面的某些实现方式中，所述方法还包括：在所述第一定时器超时的情况下，所述第一终端设备向网络设备发送指示信息，所述指示信息用于指示所述第一定时器超时。
结合第十一方面，在第十一方面的某些实现方式中，在所述第一定时器超时时，若所述第一终端设备未接收到所述第二终端设备发送的对所述AS配置信息的响应消息，所述方法还包括下述中的一项或多项：所述第一终端设备停止通过所述单播连接向所述第二终端设备进行传输；所述第一终端设备释放所述单播连接的发送缓存，所述发送缓存包括下述中的一项或多项：待发送的资源请求(source request，SR)、待发送的缓存状态报告BSR、待发送的数据；所述第一终端设备的AS向上层指示在所述第一定时器超时时所述第一终端设备未接收到所述第二终端设备发送的对所述AS配置信息的响应消息，所述上层为车到所有V2X层或者应用层；在所述V2X层接收到所述AS发送的指示的情况下，所述V2X层发起单播连接释放流程，并且所述V2X层指示所述AS释放所述单播连接的AS配置；所述AS释放所述单播连接的AS配置，并且向所述V2X层指示所述AS已释放所述单播连接的AS配置；或者，所述AS向应用层指示针对所述单播连接的侧行链路不可用。
结合第十一方面，在第十一方面的某些实现方式中，在所述第一定时器超时时，若所述第一终端设备未接收到所述第二终端设备发送的对所述AS配置信息的响应消息，所述方法还包括：所述第一终端设备进行所述单播连接链路恢复。
结合第十一方面，在第十一方面的某些实现方式中，所述第一终端设备进行所述单播连接链路恢复，包括：所述第一终端设备进行所述单播连接链路恢复，并启动第二定时器；以及，所述方法还包括：若在所述第二定时器运行期间，所述单播链路链路恢复成功，停止所述第二定时器。
第十二方面，提供了一种通信装置，包括用于执行第一方面至第十一方面以及第一方面第至第十一方面中任一种可能实现方式中的方法的各个模块或单元。
第十三方面，提供了一种装置，包括处理器。该处理器与存储器耦合，可用于执行存储器中的指令，以使得该装置执行上述第一方面至第十一方面以及第一方面至第十一方面中任一种可能实现方式中的方法。可选地，该装置还包括存储器。可选地，该装置还包括接口电路，处理器与接口电路耦合。
第十四方面，提供了一种处理器，包括：输入电路、输出电路和处理电路。该处理电路用于通过该输入电路接收信号，并通过该输出电路发射信号，使得该处理器执行第一方面至第十一方面以及第一方面至第十一方面任一种可能实现方式中的方法。
在具体实现过程中，上述处理器可以为芯片，输入电路可以为输入管脚，输出电路可以为输出管脚，处理电路可以为晶体管、门电路、触发器和各种逻辑电路等。输入电路所接收的输入的信号可以是由例如但不限于接收器接收并输入的，输出电路所输出的信号可以是例如但不限于输出给发射器并由发射器发射的，且输入电路和输出电路可以是同一电路，该电路在不同的时刻分别用作输入电路和输出电路。本申请实施例对处理器及各种电路的具体实现方式不做限定。
第十五方面，提供了一种处理装置，包括处理器和存储器。该处理器用于读取存储器中存储的指令，并可通过接收器接收信号，通过发射器发射信号，以执行第一方面至第十一方面以及第一方面至第十一方面任一种可能实现方式中的方法。
可选地，该处理器为一个或多个，该存储器为一个或多个。
可选地，该存储器可以与该处理器集成在一起，或者该存储器与处理器分离设置。
在具体实现过程中，存储器可以为非瞬时性(non-transitory)存储器，例如只读存储器(read only memory，ROM)，其可以与处理器集成在同一块芯片上，也可以分别设置在不同的芯片上，本申请实施例对存储器的类型以及存储器与处理器的设置方式不做限定。
上述第十四方面中的处理装置可以是一个芯片，该处理器可以通过硬件来实现也可以通过软件来实现，当通过硬件实现时，该处理器可以是逻辑电路、集成电路等；当通过软件来实现时，该处理器可以是一个通用处理器，通过读取存储器中存储的软件代码来实现，该存储器可以集成在处理器中，可以位于该处理器之外，独立存在。
第十六方面，提供了一种计算机程序产品，该计算机程序产品包括：计算机程序(也可以称为代码，或指令)，当该计算机程序被运行时，使得计算机执行上述第一方面至第十一方面以及第一方面至第十一方面中任一种可能实现方式中的方法。
第十七方面，提供了一种计算机可读存储介质，该计算机可读存储介质存储有计算机程序(也可以称为代码，或指令)当其在计算机上运行时，使得计算机执行上述第一方面至第十一方面以及第一方面至第十一方面中任一种可能实现方式中的方法。
第十八方面，提供了一种通信系统，包括前述的第一终端设备和/或第二终端设备。
附图说明
图1是一种V2X通信架构的示意图；
图2是一个V2X组通通信的示意图；
图3是本申请提供的一个通信方法的示意性流程图；
图4是本申请提供的一个通信方法的示意性流程图；
图5是本申请提供的一个通信方法的示意性流程图；
图6是本申请提供的一个通信方法的示意性流程图；
图7是本申请提供的一个通信方法的示意性流程图；
图8是本申请提供的一种通信装置的结构示意图；
图9是本申请提供的一种终端设备的结构示意图；
图10是本申请提供的另一种通信装置的结构示意图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
本申请提供的技术方案可以应用于设备到设备(device to device，D2D)场景中，可选地，可以应用于车联网(vehicle to everything，V2X)场景中。示例性的，V2X场景可具体为以下系统中的任一种：车车通信(vehicle to vehicle，V2V)、车人通信(vehicle to pedestrian，V2P)、车-网络(vehicle to network，V2N)业务和车与基础设施通信(vehicle to infrastructure，V2I)等。
示例性的，D2D可以是长期演进(long term evolution，LTE)D2D，新无线(new radio，NR)D2D，还可以是随着技术的发展可能出现的其他通信系统中的D2D。类似地，V2X可以是LTE V2X、NR V2X，还可以是随着技术的发展可能出现的其他通信系统中的V2X。
本申请实施例中的终端设备例如可以是用户设备(user equipment，UE)、车辆、装载在车上的传感器、车载单元(on board unit，OBU)、路侧单元(road side unit，RSU)、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理、用户装置、蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、可穿戴设备等。
应理解，本申请实施例中的终端设备还可以指终端设备中的芯片、具有D2D或者V2X通信功能的通信装置，单元或模块等，比如车载通信装置，车载通信模块或者车载通信芯片等。
需要说明的是，为使本领域技术人员更好的理解本申请，下文中将以终端设备为UE、为例，对本申请进行介绍。但应理解，UE可以被替换为其他形式的终端设备(或终端设备中的芯片或电路等)，如车载设备、可穿戴设备等。
本申请中的基站是指网络设备、或者配置于网络设备中的芯片或电路等。网络设备可以是演进型节点B(evolved Node B，eNB)、无线网络控制器(radio network controller，RNC)、节点B(Node B，NB)、基站控制器(base station controller，BSC)、基站收发台(base transceiver station，BTS)、家庭基站(例如，home evolved NodeB，或home Node B，HNB)、基带单元(baseband unit，BBU)，无线保真(wireless fidelity，WiFi)系统中的接入点(access point，AP)、无线中继节点、无线回传节点、传输点(transmission point，TP)或者发送接收点(transmission and reception point，TRP)等，还可以为5G，如，NR，系统中的gNB，或，传输点(TRP或TP)，5G系统中的基站的一个或一组(包括多个天线面板)天线面板，或者，还可以为构成gNB或传输点的网络节点，如基带单元(BBU)， 或，分布式单元(distributed unit，DU)等。
在一些部署中，gNB可以包括集中式单元(centralized unit，CU)和DU。gNB还可以包括有源天线单元(active antenna unit，简称AAU)。CU实现gNB的部分功能，DU实现gNB的部分功能，比如，CU负责处理非实时协议和服务，实现无线资源控制(radio resource control，RRC)，分组数据汇聚层协议(packet data convergence protocol，PDCP)层的功能。DU负责处理物理层协议和实时服务，实现无线链路控制(radio link control，RLC)层、媒体接入控制(media access control，MAC)层和物理(physical，PHY)层的功能。AAU实现部分物理层处理功能、射频处理及有源天线的相关功能。由于RRC层的信息最终会变成PHY层的信息，或者，由PHY层的信息转变而来，因而，在这种架构下，高层信令，如RRC层信令，也可以认为是由DU发送的，或者，由DU+AAU发送的。可以理解的是，网络设备可以为包括CU节点、DU节点、AAU节点中一项或多项的设备。此外，可以将CU划分为接入网(radio access network，RAN)中的网络设备，也可以将CU划分为核心网(core network，CN)中的网络设备，本申请对此不做限定。本申请可以应用于多种应用场景，如D2D、中继(Relay)、无线网格网络(Mesh)、接入回传一体化(integrated access&backhaul，IAB)、车联网(vehicle to everything，V2X)、UE协作、高频传输、工业场景、机器人协作、物联网等场景。
图1示出了V2X通信架构的一个示意图。如图1所示，该架构中包括两种通信接口，即PC5接口和Uu接口。其中，PC5接口是具有V2X通信功能的UE(例如图中所示V2XUE 1和V2X UE 2)之间直连通信接口，V2X UE之间的直连通信链路也被定义为侧行链路或侧链(sidelink，SL)。Uu接口通信是发送方V2X UE(例如，V2X UE 1)将V2X数据通过Uu接口发送至基站，通过基站发送至V2X应用服务器进行处理后，再由V2X应用服务器下发至基站，并通过基站发送给接收方V2X UE(例如，V2X UE 2)的通信方式。在Uu接口通信方式下，转发发送方V2X UE的上行数据至应用服务器的基站和转发应用服务器下发至接收方V2X UE的下行数据的基站可以是同一个基站，也可以是不同的基站，具体可以由V2X UE所处位置决定。应理解，发送方V2X UE向基站的发送称为上行(uplink，UL)传输，基站向接收方V2X UE的发送称为下行(downlink，DL)传输。
NR V2X支持组播通信。如图2所示，一个分组可以包括N(N≥2)个UE，如图中所示UE#1、UE#2、UE#3和UE#4。在一个分组内，可能存在传输AS的相关信息的需求，即，可能存在不是APP层触发的信息传输的场景。比如，组内的一个UE组播数据后，其他UE需要进行HARQ反馈，那么这些UE就需要知道使用什么样的资源进行HARQ反馈。根据现有技术，单播连接只能由APP层触发，而没有AS触发的单播连接或者组播的方案，因此UE无法获知进行HARQ的资源。
为解决上述问题，本申请提供了一种通信方法，在APP层没有业务传输时，也能建立组内UE之间的单播连接，以传输AS的相关信息，例如指示HARQ反馈的资源的信息。或者，在APP层没有业务传输时，也能利用组播通信的PC5-S信令传输AS的相关信息。以下，对本申请提供的方案进行说明。
需要说明的是，本文中将发起建立目标分组的UE，称为“头(leader)UE”，将目标分组内其他的UE称为“成员UE”。应注意，本文中“头UE”与现有技术中的“头UE”的含义可以不同，本文中的头UE只是发起建立分组的UE，可以不具备现有技术中的头 UE所具有的其他功能。也就是说，本文中的头UE可以是现有技术中的头UE，也可以不是。
图3是本申请提供的一种通信方法的示意性流程图。通过该方法300，可以建立分组，实现组播通信。应理解，方法300中，第一UE可以对应第一终端设备，第二UE可以对应第二终端设备，标识#1可以对应第一标识，标识#2可以对应第二标识，但本申请对此不作限定。
参见图3，该方法300可以包括S310和S320，下面对各步骤进行说明。
S310，第一UE广播分组建立请求消息。
针对某一业务类型，第一UE需要发起组播通信时，可以首先建立针对该业务类型的分组。在建立分组后，第一UE可以进行组播通信。
比如，第一UE需要发起针对目标业务类型的组播通信时，可以首先通过广播分组建立请求消息，建立目标分组。具体地，第一UE可以为该组播通信分配一个源标识(记作：标识#1)，以及一个组标识(记作：组标识)。标识#1可以作为第一UE发起组播通信时的层2(layer 2，L2)Source ID，组标识可以作为第一UE发起组播通信时的目的标识，即L2 Destinations ID。第一UE以标识#1为源标识，以目标业务类型对应的默认标识为目的标识，广播该分组建立请求消息。其中，该分组建立请求消息包括该组标识和/或该目标分组在应用层的信息。目标分组在应用层的信息例如可以是该分组在应用层的标识。应理解，如果分组建立请求消息携带目标分组在应用层的信息，基于该目标分组在应用层的信息，组内UE可以基于相同的映射规则，映射出目标分组对应的组标识。
应理解，所述“第一UE以标识#1为源标识，以该目标业务对应的默认标识为目的标识，广播该分组建立请求消息”是指：第一UE在MAC层对该分组建立请求消息进行处理时，将标识#1作为源标识，将该目标业务对应的默认标识作为目的标识，封装在对应的MAC PDU头上，进而传递给物理层进行处理并发送出去。
S320，成员UE回复分组建立请求接受消息。
成员UE接收到分组建立请求消息后，若基于分组建立请求消息中携带的信息，确认目标分组是自己需要加入的分组，则为该目标分组或者说为针对该目标分组的组播通信分配一个源标识。并且，各成员UE以自己为组播通信分配的标识作为源标识，并以组标识为目的标识，回复分组建立请求接受消息。比如，第二UE在接收到分组建立请求消息后，若确认加入目标分组，则为该组播通信分配一个源标识(记作：标识#2)，并以标识#2为源标识，以组标识为目的标识，向第一UE回复分组建立请求接受消息，此时第二UE即为一个成员UE。
应理解，第二UE以标识#2为源标识，以组标识为目的标识，回复分组建立请求接受消息”是指，第二UE在MAC层对该分组建立请求接受消息进行处理时，将标识#2作为源标识，分装在对应的MAC PDU头上，将组标识作为目的标识，并将该目的标识的第一部分封装在对应的MAC PDU头上，进而将该MAC PDU传递给物理层进行处理。进一步的，在物理层将该目的标识的剩余部分封装在物理层的信息中，具体的，可以是封装在物理层生成的SCI中，进而最终发送出去。此外，单播通信也采用上述方式进行发送。
之后，目标分组内任一UE可以以自己为组播通信分配的源标识为源标识，以组标识为目的标识，发起组播通信。比如，第一UE可以以标识#1为源标识，以组标识为目的标 识，向成员UE组播数据。又如，第二UE可以以标识#2为源标识，以组标识为目的标识，向第一UE和除自己之外的成员UE组播数据。
应理解，目标分组内的UE使用源标识、目的标识进行组播通信的方式，与上文提及的第二UE使用源标识、目的标识发送分组建立请求接受消息的方式相同，此处不再赘述。
综上，根据本申请提供的通信方法，可以建立分组，从而实现组播通信。
下面，对图4至图6分别所示的通信方法进行描述。
需要说明的是，图4至图6所示的各方法，均满足如下说明：
(1)UE#1对应第一终端设备，UE#2对应第二终端设备。第一标识为UE#1为针对目标分组的组播通信分配的源标识，第二标识为UE#2为针对目标分组的组播通信分配的源标识。
UE#1可以是头UE，UE#2可以是任一成员UE。比如，UE#1可以是方法300中的第一UE，UE#2可以是方法300中的第二UE。可以理解，UE#1为第一UE，UE#2为第二UE时，第一标识可以对应方法300中的标识#1，第二标识可以对应方法300中的标识#2。
或者，UE#1和UE#2可以是任意两个成员UE。比如，UE#1和UE#2可以是方法300中描述的分组#1中的任意两个成员UE。
或者，UE#1可以是任一成员UE，UE#2可以是头UE。比如，UE#1可以是上文中的第二UE，UE#2可以是方法300中的第一UE。可以理解，UE#1为第二UE，UE#2为第一UE时，第一标识可以对应方法300中的标识#2，第二标识可以对应方法300中的标识#1。
(2)若无特殊说明，所述“组播通信”是指针对目标分组的组播通信。
(3)目标分组可以是通过方法300所建立的，也可以是通过其他方法所建立的，或者还可以是通过其他方法所获知的。无论通过何种方法建立或获知目标分组，目标分组内的各UE都可以为组播通信分配一个源标识，并且UE#1可以获得目标分组内各UE为组播通信所分配的源标识，以及目标分组对应的组标识。比如，在通过方法300建立目标分组时，若UE#1不是头UE，则UE#1可以在确定加入该分组后，通过发起单独的请求流程去获得目标分组中各UE为组播通信分配的源标识。又如，组内任一UE可以从自己的应用层获取目标分组在应用层的信息和组成员在应用层的信息，基于该目标分组在应用层的信息，组内UE可以映射出目标分组对应的组标识。基于该组成员在应用层的信息，组内UE可以映射出组内所有UE的源标识(相当于为组播通信分配的源标识)。此时组内所有UE在执行上述映射行为时，遵循的是一套统一的算法，从而实现组内所有UE映射出的信息彼此一致。应理解，下文中出现的与获取第一标识和/或第二标识相关的步骤均可以参照这里的说明。
(4)目标分组中的任一UE发起组播通信是指，该UE对目标分组中的其他UE组播数据。相应地，目标分组中的一个UE对另一UE发起的组播通信进行HARQ反馈是指，目标分组的一个UE对该另一个UE所组播的数据所对应的传输块(transport block，TB)进行HARQ反馈。
(5)下文中主要描述了UE#1与UE#2之间的交互，实践中，UE#1与其他UE之间的交互都可以参照UE#1与UE#2之间的交互。
图4示出了一种通信方法，该方法400可以包括S410和S420。以下对图4所示的各 步骤进行说明。
S410，UE#1获取第一标识和第二标识。
S420，UE#1以第一标识为源标识，以第二标识为目的标识，向UE#2发送第一AS配置信息。
相应地，UE#2以第一标识为源标识，以第二标识为目的标识，接收第一AS配置信息。也就是说，若UE#2接收到以第一标识为源标识，以第二标识为目的标识，发送的第一AS配置信息，则可以确定该第一AS配置信息是发送给自己的，且该第一AS配置信息应用于目标分组。其中，第一AS配置信息是与AS相关的信息，或者说第一AS配置信息用于对AS进行配置。
可选地，第一AS配置信息可以通过侧行链路无线资源控制(radio resource control，RRC)信令发送。应理解，UE#1可以以第一标识为源标识，以第二标识为目的标识，与UE#2之间建立一个信令无线承载(signal radio bearer，SRB)，通过该SRB，可以发送侧行链路RRC信令。
在第一个示例中，第一AS配置信息可以用于UE#1确定第一反馈资源或者说确定第一反馈资源的信息。也就是说，UE#1根据第一AS配置信息，可以确定第一反馈资源。第一反馈资源可以用于UE#2对UE#1发起的组播通信进行HARQ反馈。比如，第一AS配置信息可以包括一个索引#1(或ID)，UE#1根据该索引#1，可以确定第一反馈资源。可选地，第一AS配置信息还可以包括第二标识。
举例来说，反馈资源(例如，第一反馈资源，或者，下文中的第二反馈资源、第三反馈资源或第四反馈资源等)可以包括时域资源、频域资源和码资源中的至少一种。示例性的，时域资源可以包括起始符号位置、所占用的符号的数量、结束位置、周期等中的一项或多项。频域资源可以包括起始频域位置、所占用子信道数量、结束频域位置等中的一项或多项。码资源例如可以是进行HARQ反馈所使用的码或序列。
在一种实现方式中，UE#2可以根据第一AS配置信息和UE#1发起的组播通信所使用的资源，确定第一反馈资源。例如，第一AS配置信息可以指示第一反馈资源在时域/频域上的起始位置与UE#1发起的组播通信所使用的时域、频域资源的结束位置之间的关系。可以理解为，与UE#1发起的组播通信所使用的资源对应的有至少一个反馈资源，UE#2可以先基于UE#1发起的组播通信所使用的资源确定出该至少一个反馈资源，进一步基于第一AS配置信息在该至少一个反馈资源中确定自己能用的反馈资源，即第一反馈资源。
在另一种实现方式中，UE#2可以根据第一AS配置信息和UE#1的指示信息，确定第一反馈资源。例如，UE#1会在侧行链路控制信息(sidelink control inforamtion，SCI)中包含一个指示信息，该指示信息指示该组播通信对应的至少一个反馈资源，UE#2接收该指示信息，确定该至少一个反馈资源，并基于第一AS配置信息从该至少一个反馈资源中确定自己能用的反馈资源，即第一反馈资源。
在又一种实现方式中，UE#2可以根据第一AS配置信息，从预配置资源中确定第一反馈资源。比如，UE#2可以根据预定义的索引值与反馈资源之间的对应关系，确定第一反馈资源。
针对第一个示例，可以理解，目标分组中除UE#1和UE#2以外的UE，也可以分别向UE#2发送一个信息，该信息可以用于UE#1确定对相应的UE发起的组播通信进行 HARQ反馈的资源。比如，目标分组中还包括UE#3和UE#4，那么UE#3可以向UE#2发送信息#1，信息#1可以用于UE#2确定对UE#3发起的组播通信进行HARQ反馈的资源，UE#4可以向UE#2发送信息#2，信息#2可以用于UE#2确定对UE#4发起的组播通信进行HARQ反馈的资源。应理解，每个UE发送所述信息时，以自己为组播通信分配的标识为源标识，以第二标识为目的标识。
还可以理解，UE#2也可以分别向目标分组中的其他UE分别发送一个信息，每个信息用于对应的UE确定对UE#2发起的组播通信进行HARQ反馈的资源。
比如，UE#2可以以第二标识为源标识，以第一标识为目的标识，向UE#1发送第三AS配置信息。相应地，UE#1可以以第二标识为源标识，以第一标识为目的标识，接收第三AS配置信息。第三AS配置信息可以用于UE#1确定第四反馈资源，第四反馈资源用于UE#1确定对UE#2发起的组播通信进行HARQ反馈。
在第二个示例中，第一AS配置信息除用于UE#1确定第一反馈资源以外，还可以用于UE#2确定至少一个第二反馈资源。该至少一个第二反馈资源与目标分组中除UE#2以外的UE一一对应，任一第二反馈资源用于UE#2对该第二反馈资源对应的UE发起的组播通信进行HARQ反馈。
也就是说，UE#2可以根据第一AS配置信息，确定对目标分组中除自己之外的其他所有UE发起的组播通信进行HARQ反馈的资源。比如，UE#1可以根据索引#1确定目标分组中除自己之外的其他所有UE发起的组播通信进行HARQ反馈的资源。
应理解，UE#2确定任一第二反馈资源的方式可以与UE#1确定第一反馈资源的方式类似，这里不再赘述。另外，UE#2对目标分组中不同UE发起的组播通信进行HARQ反馈时，可以使用相同的资源，也可以使用不同的资源，本申请对此不作限定。也就是说，该至少一个第二反馈资源可以相同，并且该至少一个第二反馈资源可以和第一反馈资源相同。或者，该至少一个第二反馈资源和第一反馈资源各不相同。
在第三个示例中，UE#1除发送第一AS配置信息以外，还可以以第一标识为源标识，以第二标识为目的标识，向UE#2发送至少一个第二AS配置信息。
相应地，UE#2以第一标识为源标识，以第二标识为目的标识，接收该至少一个第二AS配置信息。也就是说，若UE#2接收到以第一标识为源标识，以第二标识为目的标识，发送的该至少一个第二AS配置信息，则可以确定该至少一个第二AS配置信息是发送给自己的，且该至少一个第二AS配置信息应用于目标分组。其中，第二AS配置信息是与AS相关的信息，或者说第二AS配置信息用于对AS进行配置。
应理解，第一AS配置信息和该至少一个第二AS配置信息可以是通过同一条消息发送的，比如，第一AS配置信息和该至少一个第二AS配置信息可以包含在AS配置信息这一条消息里。第一AS配置信息和该至少一个第二AS配置信息可以是通过两条消息分别发送的，本申请对此不作限定。
示例性的，该至少一个第二AS配置信息与目标分组中除UE#2以外的UE一一对应。UE#3对应的第二AS配置信息用于第三UE确定至少一个第三反馈资源，该至少一个第三反馈资源与目标分组中除所述第三UE以外的UE一一对应，任一第三反馈资源用于第三UE对第三反馈资源对应的UE发起的组播通信进行HARQ反馈，第三UE为目标分组中除UE#2以外的任一UE。
也就是说，UE#2可以根据第二AS配置信息，确定除自己之外的所有UE对其他UE发起的组播通信进行HARQ反馈的资源。比如，假设目标分组中共包括UE#1、UE#2、UE#3和UE#4，那么UE#2可以根据第二AS配置信息，确定UE#2、UE#3和UE#4分别发起组播通信时，UE#1进行HARQ反馈的资源，确定UE#1、UE#2和UE#4分别发起组播通信时，UE#3进行HARQ反馈的资源，以及确定UE#1、UE#2和UE#3分别发起组播通信时，UE#4进行HARQ反馈的资源。
应理解，确定第三反馈资源的方式可以与确定第一反馈资源的方式类似，这里不再赘述。另外，对于目标分组内不同UE，对同一UE发起的组播通信进行HARQ反馈时，使用的资源可以相同，也可以不同，本申请对此不作限定。
示例性的，第二AS配置信息也可以包括一个索引，但本申请对此不作限定。可选地，第二AS配置信息还可以包括该第二AS配置信息对应的UE为组播通信分配的源标识。
示例性的，本申请中，第一AS配置信息还可以包括该目标分组相关的配置信息，包括接收资源池配置、发送资源池配置、同步源配置、承载配置中的一项或多项。
综上，本申请提供的通信方法，可以使用建立分组时各UE为组播通信分配的标识，实现组内UE之间的单播通信，从而能够实现传输AS配置信息的目的。该方法不需要额外的单播连接建立流程，实现简单。
应理解，方法400描述了UE#1和UE#2使用各自为组播通信分配的源标识进行单播通信，实际上，目标分组内任意两个UE之间都可以使用各自为组播通信分配的源标识进行单播通信，本文中不再一一赘述。
图5示出了一种通信方法，该方法500可以包括S510至S550。以下对图5所示的各步骤进行说明。
S510，UE#1获取第二标识。
S520，UE#1的V2X层生成单播连接建立请求消息。
在一种实现方式中，该单播连接建立请求消息可以包括组标识。
在另一种实现方式中，该单播连接建立请求消息可以包括第二标识。可选地，该单播连接建立请求消息还可以包括组标识。
可选地，该单播连接建立请求消息的生成可以是V2X层触发的，也可以是AS触发的。
若由AS触发，AS可以先向V2X层发送指示信息，V2X层可以根据该指示信息，生成该单播连接建立请求消息。
其中，对应上述第一种实现方式，该指示信息包括组标识。
对应上述第二种实现方式，该指示信息包括第二标识。
S530，UE#1的V2X层向UE#1的AS发送该单播连接建立请求消息、第三标识和目标业务类型对应的默认标识。
其中，第三标识是UE#1为该单播连接建立请求消息所请求建立的单播连接分配的源标识。
S540，UE#1的AS广播该单播连接建立请求消息。
UE#1的AS以第三标识为源标识，以目标业务类型对应的默认标识为目的标识，广播所述单播连接建立请求消息。
S550，UE#2向UE#1发送单播连接建立响应消息。
对应S510中描述的第一种实现方式，目标分组中任一UE接收到该单播连接建立请求消息后，若决定与UE#1之间建立单播连接，则可以为该单播连接分配一个源标识，并生成单播连接建立响应消息。例如，对于UE#2来讲，UE#2若决定与UE#1之间建立单播连接，则可以为该单播连接分配一个源标识(记作：第四标识)，并生成单播连接建立响应消息。接着，UE#2以第四标识为源标识，以第三标识为目的标识，以单播通信的方式发送单播连接建立响应消息。UE#1接收到该单播连接建立响应消息后，可以确定该单播连接建立完成，之后便可以通过由第三标识和第四标识所标识的该单播连接，与UE#2之间进行单播通信。
对应S510中描述的第二种实现方式，UE#2的V2X解析该单播连接建立请求消息后，获取到该单播连接建立请求消息中的第二标识，则可以确定该单播连接建立请求消息是发送给自己的。此时，UE#2若决定与UE#1之间建立单播连接，则可以为该单播连接分配一个源标识，即第四标识，并生成单播连接建立响应消息。接着，UE#2以第四标识为源标识，以第三标识为目的标识，发送单播连接建立响应消息。UE#1接收到该单播连接建立响应消息后，可以确定该单播连接建立完成，之后便可以通过由第三标识和第四标识所标识的该单播连接，与UE#2之间进行单播通信。比如，该方法还可以包括：
S560，UE#1以第三标识为源标识，以第四标识为目的标识，向UE#2发送第一AS配置信息。
相应地，UE#2以第三标识为源标识，以第四标识为目的标识，接收该第一AS配置信息。
关于第一AS配置信息，可以参见上文对其所作的说明，这里不再赘述。
应理解，S510至S550描述了UE#1与UE#2之间建立单播连接的流程，实践中，目标分组内任意两个UE之间都可以参照UE#1与UE#2之间建立单播连接的流程，建立单播连接，本文中不再一一赘述。需要说明的是，针对S510中描述的第二种实现方式，UE#1为与目标分组内不同的UE之间建立的单播连接可以分配不同的源标识。比如，UE#1可以为UE#2分配第三标识，为UE#3分配第五标识。
还应理解，与方法400中针对第一个示例所作的说明类似，目标分组中除UE#1和UE#2以外的UE，可以分别向UE#2发送一个信息，该信息可以用于UE#1确定对相应的UE发起的组播通信进行HARQ反馈的资源。应理解，每个UE发送所述信息时，以自己为自己与UE#2之间的单播连接分配的源标识为源标识，以UE#2为该UE与UE#1之间的单播连接分配的源标识为目的标识。
还可以理解，UE#2也可以分别向目标分组中的其他UE分别发送一个信息，每个信息用于对应的UE确定对UE#2发起的组播通信进行HARQ反馈的资源。
比如，UE#2可以以第四标识为源标识，以第三标识为目的标识，向UE#1发送第三AS配置信息。相应地，UE#1可以以第四标识为源标识，以第三标识为目的标识，接收第三AS配置信息。第三AS配置信息可以用于UE#1确定第四反馈资源，第四反馈资源用于UE#1确定对UE#2发起的组播通信进行HARQ反馈。
与方法400中描述的第三个示例类似，在方法500中，UE#1除发送第一AS配置信息以外，还可以以第三标识为源标识，以第四标识为目的标识，向UE#2发送至少一个第二AS配置信息。第二AS配置信息的含义可以参见方法400中对其所作的说明，这里不 再赘述。
综上，根据本申请提供的方法，组内的UE之间可以建立单播建立，从而可以进行单播通信，进行可以实现传输AS配置信息的目的。
图6示出了一种通信方法，该方法600可以包括S610至S640。以下对图6所示的各步骤进行说明。
S610，UE#1获取UE#2为组播通信分配的源标识。
可选地，UE#1还可以获取目标分组中除UE#2以外的UE为组播通信分配的源标识。
S620，UE#1的V2X层生成第一侧行链路信令。
在第一种方式中，该第一侧行链路可以包括UE#2为组播通信分配的源标识(即，第二标识)和UE#2的AS配置信息。
在第二种方式中，第一侧行链路信令可以包括目标分组中各UE为组播通信分配的源标识以及各UE的AS配置信息。
在第三种方式中，该第一侧行链路信令包括源标识列表，该源标识列表包括目标分组中各UE为组播通信分配的源标识。第一源标识和第一源标识在源标识列表中的位置指示第一源标识对应的UE的AS配置信息，第一源标识为所述目标分组中任一UE为组播通信分配的源标识。也就是说，源标识列表中的任一源标识和该源标识在所述源标识列表中的位置用于该源标识对应的UE确定其对应的AS配置信息。
可选地，第一侧行链路信令还可以包括组标识。
应理解，第一侧行链路信令也可以称为PC5-S信令。
可选地，第一侧行链路信令的生成可以是V2X层触发的，也可以是AS触发的。
若由AS触发，AS可以首先向V2X层发送配置信息，V2X层可以根据该配置信息，生成第一侧行链路信令。
对应于上述第一种方式，该配置信息可以包括组标识，以及包括第二标识和UE#2的AS配置信息。
对应于上述第二种方式，该配置信息还可以包括目标分组中各UE为组播通信分配的源标识和各UE的AS配置信息。
对应于上述第三种方式，该配置信息可以包括组标识以及源标识列表。
S630，UE#1的V2X层向UE#1的AS发送第一侧行链路信令、第一标识和组标识。
S640，UE#1的AS以第一标识为源标识，以组标识为目的标识，发送第一侧行链路信令。
相应地，目标分组中的各UE的V2X层可以以第一标识为源标识，以组标识为目的标识，接收第一侧行链路信令。通过解析第一侧行链路信令，各UE的V2X层可以获得第一侧行链路信令中的内容，并且可以将所获取的内容发送给AS。
可以理解，对应于上述第一种方式，目标分组中各UE的AS可以获得UE#2的AS配置信息。对应于上述第二种方式，目标分组中各UE的AS可以获得目标分组中各UE的AS配置信息。对应于上述第三种方式，目标分组中各UE可以获得源标识列表。
在第一种方式中，UE#2的AS配置信息可以包括第一AS配置信息。关于第一AS配置信息，具体可以参见上文的描述。
可选地，UE#2的AS配置信息还可以包括至少一个第二AS配置信息。关于第二AS 配置信息，具体可以参见上文的描述。
在第二种方式中，UE#2的AS配置信息可以包括第一AS配置信息，关于第一AS配置信息，具体可以参见上文的描述。
应理解，目标分组中的其他UE的AS配置信息与UE#2的AS配置信息类似，可以参照对UE#2的AS配置信息所作的说明。
可选地，该方法还可以包括：UE#2以第二标识为源标识，以组标识为目的标识，发送第二侧行链路信令。第二侧行链路信令可以包括第三AS配置信息。关于第三AS配置信息，可以参见上文的描述。
本申请提供的方法，可以通过侧行链路信令交互组内UE的AS配置信息，实现传输AS配置信息的目的。
本申请还提供了一种通信方法，该方法可以在建立分组的过程中，建立单播连接。下面结合图7进行说明。
图7示出了一种通信方法，该方法可以包括S710和S720。下面对图7所示的各步骤进行说明。应理解，这里的UE#1和UE#2分别对应方法300中的第一UE和第二UE，第一标识和第二标识对应方法300中的标识#1和标识#2。
S710，UE#1广播分组建立请求消息。
该步骤可以参照S310。相比于S310，这里的分组建立请求消息还可以包括第三标识，第三标识为UE#1为UE#1与目标分组内的UE之间的单播连接分配的源标识。
S720，成员UE回复分组建立请求接受消息。
该步骤可以参照S320。相比于S320，这里，成员UE接收到分组建立请求消息后，若确定建立单播连接，则为该单播连接分配一个源标识，并且将该源标识携带在回复的分组建立请求接受消息中。比如，UE#2若确定建立单播连接，则可以为该单播连接分别一个源标识(记作：第四标识)，然后将第四标识携带在分组建立请求接受消息中。UE#1收到各成员UE回复的分组建立请求接受消息，可以解析出各成员为单播连接分配的源标识。之后，UE#1可以以第三标识为源标识，以成员UE为单播连接分配的源标识为目的标识，向成员UE发送其对应的AS配置信息。
比如，该方法还可以包括：
S730，UE#1向UE#2发送第一AS配置信息。
关于第一AS配置信息，可以参见上文的描述。
可选地，该方法还可以包括：UE#1向UE#2发送第二AS配置信息。
关于第二AS配置信息，可以参见上文的描述。
可选地，该方法还可以包括：UE#2以第四标识为源标识，以第三标识为目的标识，向UE#1发送第三AS配置信息。
关于第三AS配置信息，可以参见上文的描述。
根据本申请提供的方法，UE可以在建立分组的过程中建立单播连接，从而可以实现传输AS配置信息的目的。
需要说明的是，本文所涉及的AS配置信息，如第一AS配置信息、第二AS配置信息等，并不限于通过上文所描述的方法传输。本文所涉及的AS配置信息，也可以通过其他合理的方式进行传输。通过相应的AS配置信息，对于目标分组内任一UE，该UE可以 获知对其他UE发起组播通信时，进行HARQ反馈的资源。以下，将用于进行HARQ反馈的资源统称为：HARQ反馈资源。应理解，下文中的HARQ反馈资源主要指时频资源。
以UE#1组播数据为例，对于目标分组内任一UE，如UE#2来讲，如果UE#2能正确地从TB中解出UE#2发送的媒体接入控制协议数据单元(media access control protocol data unit，MAC PDU)，则使用相应的HARQ反馈资源向UE#1反馈肯定应答(acknowledgement，ACK)。如果UE#2接收了UE#1发送的TB，但没能正确解出MAC PDU，则会使用相应的HARQ反馈资源向UE#1发送否定应答(negative acknowledgement，NACK)。还有一种可能是UE#2没有接收到任何信号，则UE#2不会使用相应的HARQ反馈资源向UE#1发送任何信息。
相应地，对UE#1来说，如果发送了TB后，收到UE#2使用相应的HARQ反馈资源反馈的ACK，则认定该MAC PDU发送成功，进而丢弃或删除缓存该MAC PDU，进而去发起新数据的传输；如果收到UE#2使用相应的HARQ反馈资源反馈的NACK，则认定该TB传输失败，如果该TB对应的MAC PDU重传次数还未达到最大次数，或者如果该TB对应的MAC PDU发送定时器还未超时，则UE#1对该MAC PDU进行重传；如果UE#1在相应的HARQ反馈资源上未收到ACK或者NACK，则认为是发送失败，等效于收到NACK，同样的，如果该MAC PDU重传次数还未达到最大次数，或者如果该MAC PDU发送定时器还未超时，则UE#1对该MAC PDU进行重传。
对于任一单播连接，不管是前文中涉及的为组播通信建立的单播连接，还是由于业务触发建立的单播连接，为了保证通信的可靠性，都需要对单播链路进行监测。出于单播链路监测的目的，如果UE#1和UE#2之间一直出现发送数据对端UE接收不到或者解不出来的情况，就该认定单播链路发生失败。
基于上述理解，本申请还提供了一种发端UE监测单播链路的方法，包括：
发端UE维护一个计数器N：
计数器N初始值为0；
如果在HARQ反馈资源上收到NACK，计数器加1；
如果在HARQ反馈资源上收到ACK，计数器归零；
如果计数器N达到门限值，则认定两个UE之间该单播连接出现失败。
考虑两个UE之间存在多个单播连接，发端UE会为每个单播连接分别维护一个计数器，计数器之间互相独立。
该计数器的具体取值，可以是基站通过RRC信令或者广播消息配置的，也可以是核心网配置的，也可以是内置在UE芯片，也可以是内置在用户身份识别(subscriber identification module)SIM卡，也可以是固定的。
如前文所述，会出现收端UE未接收到发端UE发送的数据的情况，相应的，收端UE就不会使用相应的HARQ反馈资源反馈任何信息。相应的，发端UE就不会收到ACK或NACK。因为发端UE知道此次发送的数据所对应的HAQR反馈资源，当发端UE未在此次发送的数据对应的HARQ反馈资源上未收到ACK或NACK，则当作接收到NACK处理，相应的计数器也需要加1。此时，完整的发端UE监测单播链路的流程如下：
计数器N初始值为0；
如果在HARQ反馈资源上收到NACK，或者在HARQ反馈资源上未收到ACK或者 NACK，计数器加1；
如果在HARQ反馈资源上收到ACK，计数器归零；
如果计数器N达到门限值，则认定两个UE之间该单播连接出现失败。
进一步的，考虑单播链路上UE发送数据可能是没有规律的，即可能会出现两个数据发送中间间隔很长时间。在这种情况下，如果计数器继续维护的话，可能会出现误杀的可能。因为中间间隔时间较长了，在后面信道接近恢复了。因此考虑为计数器引入一个有效时间的概念，该有效时刻可以对应一个定时器T。结合前面的场景，此时完整的发端UE监测单播链路的流程如下：
计数器N初始值为0；
如果在HARQ反馈资源上收到NACK，或者在HARQ反馈资源上未收到ACK或者NACK，计数器加1；
如果这是第一次加1，或者如果N＝1，则启动定时器T；
如果在HARQ反馈资源上收到ACK，或者定时器T超时，计数器归零，并且重置定时器T；
如果计数器N达到门限值，则认定两个UE之间该单播连接出现失败，并且，重置定时器T。
隐含的，最后判定单播连接出现失败的条件包括：计数器N到达门限值，且定时器T还在运行，也可以理解为在定时去T超时前，计数器N达到门限值。
与计数器N的设置类似，计时器T的取值可以是基站通过RRC信令或者广播消息配置的，也可以是核心网配置的，也可以是内置在UE芯片，也可以是内置在SIM卡，也可以是固定的。
上述基于HARQ反馈的无线链路失败(radio link failure，RLF)判定，适用于任意单播连接场景，不限定于前文中提及的涉及组播的单播连接。
判定单播连接失败之后，涉及用户面和控制面的处理。
用户面处理包括：停止该单播连接的传输。释放该单播连接的发送缓存，具体可以包括待发送的资源请求(source request，SR)SR、缓存状态报告(buffer status report，BSR)BSR、数据中的至少一项。
控制面处理：AS可以向上层指示，所述上层可以是V2X层，也可以是应用层。
AS向V2X层指示时会进一步指示该单播连接的标识。V2X层可以进一步发起单播连接释放流程，并指示AS，AS相应的释放该单播连接相应的AS配置。如果UE是连接态，则会向基站更新sidelink UE信息。
并列可选的，AS也可以直接释放AS配置，并向V2X层指示。
向应用层指示，可以是AS通过V2X层向应用层指示，用于指示针对该单播业务sidelink不可用。
可选的，在此之前还可以尝试单播连接链路恢复。如果是空闲态或者inactive态，UE可以尝试基于广播或者预配置的信息进行恢复。如果是连接态，UE可以像基站上报失败信息，等待基站重配。
但考虑到sidelink上通信的时延问题，UE不应该一直等待恢复，即需要限定一个恢复时间。因此考虑定时器T1，该定时器T1是每个单播连接维护一个。
如果判定该单播连接发送失败，则启动该单播连接的定时器T1；如果恢复了该单播连接，则停止T1。如果定时器T1超时，则宣告该单播连接失败/恢复失败。
具体恢复单播连接的认定标准可以是UE监听到合适的资源池(该资源池可以限定不能是原资源池，或者也可以是原资源池)，或者是UE收到基站的重配置消息中包括该单播连接的标识，或者包括新的资源池。
宣告单播连接失败/恢复失败后，执行的动作如上所述，包括用户面处理和控制面处理。
前文中提到建立单播连接之后头UE向成员UE发送AS配置。在普通的单播通信场景中同样存在两个UE之间交互AS配置。发端UE向收端UE发送sidelink上的RRC消息，该RRC消息中包括AS配置。收端UE有可能会无法执行该配置，此时收端UE可以向发端UE发送配置失败消息，但有时候失败消息都发不了。此时考虑发端UE自己维护一个定时器T2，基于定时器判定配置失败。其中，该定时器T2是每个单播连接各一个。当RRC实体生成sidelink RRC消息，发给RRC的底层时，启动定时器T2。如果RRC实体收到对端UE恢复的完成消息时，停止定时器。如果定时器超时，则认定该单播连接的配置失败。判定单播连接的配置失败之后的行为与前文提到的RLF之后的处理类似。唯一不同之处在于，如果向基站发送指示，则指示的具体原因不同。
相应于上述方法实施例给出的方法，本申请实施例还提供了相应的通信装置，所述通信装置包括用于执行上述实施例相应的模块或单元。所述模块或单元可以是软件，也可以是硬件，或者是软件和硬件结合。
图8给出了一种通信装置的结构示意图。所述装置800可以是网络设备，也可以是终端设备，也可以是支持网络设备实现上述方法的芯片、芯片系统、或处理器等，还可以是支持终端设备实现上述方法的芯片、芯片系统、或处理器等。该装置可用于实现上述方法实施例中描述的方法，具体可以参见上述方法实施例中的说明。
所述装置800可以包括一个或多个处理器801，所述处理器801也可以称为处理单元，可以实现一定的控制功能。所述处理器801可以是通用处理器或者专用处理器等。例如可以是基带处理器或中央处理器。基带处理器可以用于对通信协议以及通信数据进行处理，中央处理器可以用于对通信装置(如，基站、基带芯片，终端、终端芯片，DU或CU等)进行控制，执行软件程序，处理软件程序的数据。
在一种可选的设计中，处理器801也可以存有指令和/或数据803，所述指令和/或数据803可以被所述处理器运行，使得所述装置800执行上述方法实施例中描述的方法。
在另一种可选的设计中，处理器801中可以包括用于实现接收和发送功能的收发单元。例如该收发单元可以是收发电路，或者是接口，或者是接口电路。用于实现接收和发送功能的收发电路、接口或接口电路可以是分开的，也可以集成在一起。上述收发电路、接口或接口电路可以用于代码/数据的读写，或者，上述收发电路、接口或接口电路可以用于信号的传输或传递。
在又一种可能的设计中，装置800可以包括电路，所述电路可以实现前述方法实施例中发送或接收或者通信的功能。
可选的，所述装置800中可以包括一个或多个存储器802，其上可以存有指令804，所述指令可在所述处理器上被运行，使得所述装置800执行上述方法实施例中描述的方 法。可选的，所述存储器中还可以存储有数据。可选的，处理器中也可以存储指令和/或数据。所述处理器和存储器可以单独设置，也可以集成在一起。例如，上述方法实施例中所描述的对应关系可以存储在存储器中，或者存储在处理器中。
可选的，所述装置800还可以包括收发器805和/或天线806。所述处理器801可以称为处理单元，对所述装置800进行控制。所述收发器805可以称为收发单元、收发机、收发电路或者收发器等，用于实现收发功能。
本申请中描述的处理器和收发器可实现在集成电路(integrated circuit，IC)、模拟IC、射频集成电路RFIC、混合信号IC、专用集成电路(application specific integrated circuit，ASIC)、印刷电路板(printed circuit board，PCB)、电子设备等上。该处理器和收发器也可以用各种IC工艺技术来制造，例如互补金属氧化物半导体(complementary metal oxide semiconductor,CMOS)、N型金属氧化物半导体(nMetal-oxide-semiconductor，NMOS)、P型金属氧化物半导体(positive channel metal oxide semiconductor,PMOS)、双极结型晶体管(Bipolar Junction Transistor，BJT)、双极CMOS(BiCMOS)、硅锗(SiGe)、砷化镓(GaAs)等。
以上实施例描述中的装置可以是网络设备或者终端设备,但本申请中描述的装置的范围并不限于此,而且装置的结构可以不受图8的限制。装置可以是独立的设备或者可以是较大设备的一部分。例如所述装置可以是：
(1)独立的集成电路IC，或芯片，或，芯片系统或子系统；
(2)具有一个或多个IC的集合，可选的，该IC集合也可以包括用于存储数据和/或指令的存储部件；
(3)ASIC，例如调制解调器(MSM)；
(4)可嵌入在其他设备内的模块；
(5)接收机、终端、智能终端、蜂窝电话、无线设备、手持机、移动单元、车载设备、网络设备、云设备、人工智能设备等等；
(6)其他等等。
图9提供了一种终端设备的结构示意图。为了便于说明，图9仅示出了终端设备的主要部件。如图9所示，终端设备900包括处理器、存储器、控制电路、天线以及输入输出装置。处理器主要用于对通信协议以及通信数据进行处理，以及对整个终端进行控制，执行软件程序，处理软件程序的数据。存储器主要用于存储软件程序和数据。射频电路主要用于基带信号与射频信号的转换以及对射频信号的处理。天线主要用于收发电磁波形式的射频信号。输入输出装置，例如触摸屏、显示屏，键盘等主要用于接收用户输入的数据以及对用户输出数据。
当终端设备开机后，处理器可以读取存储单元中的软件程序，解析并执行软件程序的指令，处理软件程序的数据。当需要通过无线发送数据时，处理器对待发送的数据进行基带处理后，输出基带信号至射频电路，射频电路将基带信号进行处理后得到射频信号并将射频信号通过天线以电磁波的形式向外发送。当有数据发送到终端设备时，射频电路通过天线接收到射频信号，该射频信号被进一步转换为基带信号，并将基带信号输出至处理器，处理器将基带信号转换为数据并对该数据进行处理。
为了便于说明，图9仅示出了一个存储器和处理器。在实际的终端设备中，可以存在 多个处理器和存储器。存储器也可以称为存储介质或者存储设备等，本发明实施例对此不做限制。
作为一种可选的实现方式，处理器可以包括基带处理器和中央处理器，基带处理器主要用于对通信协议以及通信数据进行处理，中央处理器主要用于对整个终端设备进行控制，执行软件程序，处理软件程序的数据。图9中的处理器集成了基带处理器和中央处理器的功能，本领域技术人员可以理解，基带处理器和中央处理器也可以是各自独立的处理器，通过总线等技术互联。本领域技术人员可以理解，终端设备可以包括多个基带处理器以适应不同的网络制式，终端设备可以包括多个中央处理器以增强其处理能力，终端设备的各个部件可以通过各种总线连接。所述基带处理器也可以表述为基带处理电路或者基带处理芯片。所述中央处理器也可以表述为中央处理电路或者中央处理芯片。对通信协议以及通信数据进行处理的功能可以内置在处理器中，也可以以软件程序的形式存储在存储单元中，由处理器执行软件程序以实现基带处理功能。
在一个例子中，可以将具有收发功能的天线和控制电路视为终端设备900的收发单元911，将具有处理功能的处理器视为终端设备900的处理单元912。如图8所示，终端设备900包括收发单元911和处理单元912。收发单元也可以称为收发器、收发机、收发装置等。可选的，可以将收发单元911中用于实现接收功能的器件视为接收单元，将收发单元911中用于实现发送功能的器件视为发送单元，即收发单元911包括接收单元和发送单元。示例性的，接收单元也可以称为接收机、接收器、接收电路等，发送单元可以称为发射机、发射器或者发射电路等。可选的，上述接收单元和发送单元可以是集成在一起的一个单元，也可以是各自独立的多个单元。上述接收单元和发送单元可以在一个地理位置，也可以分散在多个地理位置。
如图10所示，本申请提供了一种装置1000。该装置可以是终端设备，也可以是终端设备的部件(例如，集成电路，芯片等等)。该装置还可以是网络设备，也可以是网络设备的部件(例如，集成电路，芯片等等)。该装置也可以是其他通信模块,用于实现本申请方法实施例中的方法。该装置1000可以包括：处理模块1002(处理单元)。可选地，还可以包括收发模块1001(收发单元)和存储模块1003(存储单元)。
在一种可能的设计中，如图10中的一个或者多个模块可能由一个或者多个处理器来实现，或者由一个或者多个处理器和存储器来实现；或者由一个或多个处理器和收发器实现；或者由一个或者多个处理器、存储器和收发器实现，本申请实施例对此不作限定。所述处理器、存储器、收发器可以单独设置，也可以集成。
所述装置具备实现本申请实施例描述的终端设备的功能，比如，所述装置包括终端设备执行本申请实施例描述的终端设备涉及步骤所对应的模块或单元或手段(means)，所述功能或单元或手段(means)可以通过软件实现，或者通过硬件实现，也可以通过硬件执行相应的软件实现，还可以通过软件和硬件结合的方式实现。详细可进一步参考前述对应方法实施例中的相应描述。
或者所述装置具备实现本申请实施例描述的网络设备的功能，比如，所述装置包括所述网络设备执行本申请实施例描述的网络设备涉及步骤所对应的模块或单元或手段(means)，所述功能或单元或手段(means)可以通过软件实现，或者通过硬件实现，也可以通过硬件执行相应的软件实现，还可以通过软件和硬件结合的方式实现。详细可进一 步参考前述对应方法实施例中的相应描述。
应理解，本申请实施例中的处理器可以是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现场可编程门阵列(field programmable gate array，FPGA)或者其它可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。
可以理解，本申请实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。应注意，本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
本申请还提供了一种计算机可读存储介质，其上存储有计算机程序，该计算机程序被计算机执行时实现上述任一方法实施例的功能。
本申请还提供了一种计算机程序产品，该计算机程序产品被计算机执行时实现上述任一方法实施例的功能。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，高密度数字视频光盘(digital video disc，DVD))、或者半导体介质(例如，固态硬盘(solid state disk，SSD))等。
应理解，说明书通篇中提到的“实施例”意味着与实施例有关的特定特征、结构或特性包括在本申请的至少一个实施例中。因此，在整个说明书各个实施例未必一定指相同的实施例。此外，这些特定的特征、结构或特性可以任意适合的方式结合在一个或多个实施例 中。应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
还应理解，在本申请中，“当…时”、“若”以及“如果”均指在某种客观情况下UE或者基站会做出相应的处理，并非是限定时间，且也不要求UE或基站实现时一定要有判断的动作，也不意味着存在其它限定。
另外，本文中术语“系统”和“网络”在本文中常被可互换使用。本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。
本文中术语“……中的至少一个”或“……中的至少一种”，表示所列出的各项的全部或任意组合，例如，“A、B和C中的至少一种”，可以表示：单独存在A，单独存在B，单独存在C，同时存在A和B，同时存在B和C，同时存在A、B和C这六种情况。
本文中的“至少一个”表示一个或者多个。“多个”表示两个或者两个以上。
应理解，在本申请各实施例中，“与A相应的B”表示B与A相关联，根据A可以确定B。但还应理解，根据A确定B并不意味着仅仅根据A确定B，还可以根据A和/或其它信息确定B。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而 前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (43)

  1. 一种通信方法，其特征在于，包括：
    第一终端设备获取第二终端设备为组播通信分配的源标识，所述组播通信是针对目标分组的通信，所述第一终端设备和所述第二终端设备属于所述目标分组；
    第一终端设备的车到所有V2X层生成第一侧行链路信令，其中，所述第一侧行链路信令包括所述第二终端设备为组播通信分配的源标识和所述第二终端设备的接入层AS配置信息；
    所述V2X层向所述第一终端设备的AS发送所述第一侧行链路信令、第一标识和组标识，所述第一标识为所述第一终端设备为所述组播通信分配的源标识，所述组标识用于标识所述目标分组；
    所述AS以所述第一标识为源标识，以所述组标识为目的标识，发送所述第一侧行链路信令。
  2. 如权利要求1所述的方法，其特征在于，在所述第一终端设备的车到所有V2X层生成第一侧行链路信令之前，所述方法还包括：
    所述第一终端设备的AS向所述V2X层发送配置信息，所述配置信息包括所述组标识，以及包括所述第二终端设备为组播通信分配的源标识和所述第二终端设备的AS配置信息；
    其中，所述第一终端设备的车到所有V2X层生成第一侧行链路信令，包括：
    所述V2X层根据所述配置信息，生成所述第一侧行链路信令。
  3. 如权利要求1或2所述的方法，其特征在于，第二终端设备的AS配置信息包括第一AS配置信息，所述第一AS配置信息用于所述第二终端设备确定第一反馈资源，所述第一反馈资源用于所述第二终端设备对所述第一终端设备发起的所述组播通信进行混合自动重传请求HARQ反馈。
  4. 如权利要求3所述的方法，其特征在于，所述第一AS配置信息还用于所述第二终端设备确定至少一个第二反馈资源，所述至少一个第二反馈资源与所述目标分组中除所述第二终端设备以外的终端设备一一对应，任一第二反馈资源用于所述第二终端设备对所述第二反馈资源对应的终端设备发起的所述组播通信进行HARQ反馈。
  5. 如权利要求3或4所述的方法，其特征在于，所述第二终端设备的AS配置信息还包括至少一个第二AS配置信息，所述至少一个第二AS配置信息与所述目标分组中除所述第二终端设备以外的终端设备一一对应，第三终端设备对应的第二AS配置信息用于所述第三终端设备确定至少一个第三反馈资源，所述至少一个第三反馈资源与所述目标分组中除所述第三终端设备以外的终端设备一一对应，任一第三反馈资源用于所述第三终端设备对所述第三反馈资源对应的终端设备发起的所述组播通信进行HARQ反馈，所述第三终端设备为所述目标分组中除所述第二终端设备以外的任一终端设备。
  6. 如权利要求3或4所述的方法，其特征在于，所述方法还包括：
    所述第一终端设备接收所述第二终端设备发送的第二侧行链路信令，所述第二侧行链路信令包括第三AS配置信息，所述第三AS配置信息用于所述第一终端设备确定第四反 馈资源，所述第四反馈资源用于所述第一终端设备对所述第二终端设备发起的所述组播通信进行混合自动重传请求HARQ反馈。
  7. 如权利要求1至6中任一项所述的方法，其特征在于，所述第一侧行链路信令还包括所述目标分组中除所述第二终端设备以外的其他各终端设备分别为所述组播通信分配的源标识以及所述各终端设备的AS配置信息。
  8. 如权利要求1至7中任一项所述的方法，其特征在于，在所述第一终端设备获取目标分组中各终端设备为组播通信分配的源标识之前，所述方法还包括：
    所述第一终端设备以所述第一标识为源标识，以目标业务类型对应的默认标识为目的标识，广播分组建立请求消息，其中，所述分组建立请求消息用于请求建立所述目标分组，所述分组建立请求消息包括所述组标识和所述目标分组在应用层的信息；
    所述第一终端设备接收所述目标分组中除所述第一终端设备以外的各终端设备反馈的分组建立接受消息，其中，任一终端设备对应的所述分组建立请求接受消息的发送以所述终端设备为所述组播通信分配的源标识为源标识，以所述组标识为目的标识。
  9. 一种通信方法，其特征在于，包括：
    第二终端设备接收第一终端设备发送的第一侧行链路信令，
    其中，所述第一侧行链路信令包括所述第二终端设备为组播通信分配的源标识和所述第二终端设备的接入层AS配置信息，所述组播通信是针对目标分组的通信，所述第一终端设备和所述第二终端设备属于所述目标分组。
  10. 如权利要求9所述的方法，其特征在于，所述第二终端设备接收第一终端设备发送的第一侧行链路信令，包括：
    所述第二终端设备的车到所有V2X层接收所述第一侧行链路信令；
    以及，所述方法还包括：
    所述V2X层向所述第二终端设备的接入层AS发送所述第二终端设备为组播通信分配的源标识和所述第二终端设备的AS配置信息。
  11. 如权利要求10所述的方法，其特征在于，第二终端设备的AS配置信息包括第一AS配置信息；
    以及，所述方法还包括：
    所述AS根据所述第一AS配置信息，确定第一反馈资源，所述第一反馈资源用于所述第二终端设备对所述第一终端设备发起的所述组播通信进行混合自动重传请求HARQ反馈。
  12. 如权利要求11所述的方法，其特征在于，所述方法还包括：
    所述AS根据所述第一AS配置信息，确定至少一个第二反馈资源，所述至少一个第二反馈资源与所述目标分组中除所述第二终端设备以外的终端设备一一对应，任一第二反馈资源用于所述第二终端设备对所述第二反馈资源对应的终端设备发起的所述组播通信进行HARQ反馈。
  13. 如权利要求11或12所述的方法，其特征在于，所述第二终端设备的AS配置信息还包括至少一个第二AS配置信息；
    以及，所述方法还包括：
    所述AS根据所述至少一个第二AS配置信息，确定所述目标分组中除所述第二终端 设备以外的任一终端设备对应的反馈资源，其中，第三终端设备的反馈资源包括至少一个第三反馈资源，所述至少一个第三反馈资源与所述目标分组中除所述第三终端设备以外的终端设备一一对应，任一第三反馈资源用于所述第三终端设备对所述第三反馈资源对应的终端设备发起的所述组播通信进行HARQ反馈，所述第三终端设备为所述目标分组中除所述第二终端设备以外的任一终端设备。
  14. 如权利要求11或12所述的方法，其特征在于，所述方法还包括：
    所述第二终端设备向所述第一终端设备发送第二侧行链路信令，所述第二侧行链路信令包括第三AS配置信息；
    所述第二终端设备根据所述第三AS配置信息，确定第四反馈资源，所述第四反馈资源用于所述第一终端设备对所述第二终端设备发起的所述组播通信进行混合自动重传请求HARQ反馈。
  15. 如权利要求9至14中任一项所述的方法，其特征在于，所述第一侧行链路信令还包括所述目标分组中除所述第二终端设备以外的其他各终端设备分别为所述组播通信分配的源标识以及所述各终端设备的AS配置信息。
  16. 一种通信装置，其特征在于，包括：
    处理单元，用于获取第二终端设备为组播通信分配的源标识，所述组播通信是针对目标分组的通信，所述装置和所述第二终端设备属于所述目标分组；
    所述处理单元还用于，在车到所有V2X层生成第一侧行链路信令，其中，所述第一侧行链路信令包括所述第二终端设备为组播通信分配的源标识和所述第二终端设备的接入层AS配置信息；
    所述处理单元还用于，通过所述V2X层向所述装置的AS发送所述第一侧行链路信令、第一标识和组标识，所述第一标识为所述装置为所述组播通信分配的源标识，所述组标识用于标识所述目标分组；
    收发单元，用于通过所述AS以所述第一标识为源标识，以所述组标识为目的标识，发送所述第一侧行链路信令。
  17. 如权利要求16所述的装置，其特征在于，所述处理单元还用于：
    通过所述AS向所述V2X层发送配置信息，所述配置信息包括所述组标识，以及包括所述第二终端设备为组播通信分配的源标识和所述第二终端设备的AS配置信息；
    其中，所述处理单元用于在车到所有V2X层生成第一侧行链路信令，包括：
    所述处理单元用于，在所述V2X层根据所述配置信息，生成所述第一侧行链路信令。
  18. 如权利要求16或17所述的装置，其特征在于，第二终端设备的AS配置信息包括第一AS配置信息，所述第一AS配置信息用于所述第二终端设备确定第一反馈资源，所述第一反馈资源用于所述第二终端设备对所述装置发起的所述组播通信进行混合自动重传请求HARQ反馈。
  19. 如权利要求18述的装置，其特征在于，所述第一AS配置信息还用于所述第二终端设备确定至少一个第二反馈资源，所述至少一个第二反馈资源与所述目标分组中除所述第二终端设备以外的终端设备一一对应，任一第二反馈资源用于所述第二终端设备对所述第二反馈资源对应的终端设备发起的所述组播通信进行HARQ反馈。
  20. 如权利要求18或19所述的装置，其特征在于，所述第二终端设备的AS配置信 息还包括至少一个第二AS配置信息，所述至少一个第二AS配置信息与所述目标分组中除所述第二终端设备以外的终端设备一一对应，第三终端设备对应的第二AS配置信息用于所述第三终端设备确定至少一个第三反馈资源，所述至少一个第三反馈资源与所述目标分组中除所述第三终端设备以外的终端设备一一对应，任一第三反馈资源用于所述第三终端设备对所述第三反馈资源对应的终端设备发起的所述组播通信进行HARQ反馈，所述第三终端设备为所述目标分组中除所述第二终端设备以外的任一终端设备。
  21. 如权利要求18或19所述的装置，其特征在于，所述收发单元还用于：
    接收所述第二终端设备发送的第二侧行链路信令，所述第二侧行链路信令包括第三AS配置信息，所述第三AS配置信息用于所述装置确定第四反馈资源，所述第四反馈资源用于所述装置对所述第二终端设备发起的所述组播通信进行混合自动重传请求HARQ反馈。
  22. 如权利要求16至21中任一项所述的装置，其特征在于，所述第一侧行链路信令还包括所述目标分组中除所述第二终端设备以外的其他各终端设备分别为所述组播通信分配的源标识以及所述各终端设备的AS配置信息。
  23. 如权利要求16至22中任一项所述的装置，其特征在于，所述收发单元还用于：
    以所述第一标识为源标识，以目标业务类型对应的默认标识为目的标识，广播分组建立请求消息，其中，所述分组建立请求消息用于请求建立所述目标分组，所述分组建立请求消息包括所述组标识和所述目标分组在应用层的信息；
    接收所述目标分组中除所述装置以外的各终端设备反馈的分组建立接受消息，其中，任一终端设备对应的所述分组建立请求接受消息的发送以所述终端设备为所述组播通信分配的源标识为源标识，以所述组标识为目的标识。
  24. 一种通信装置，其特征在于，包括：
    收发单元，用于接收第一终端设备发送的第一侧行链路信令，
    其中，所述第一侧行链路信令包括所述装置为组播通信分配的源标识和所述装置的接入层AS配置信息，所述组播通信是针对目标分组的通信，所述第一终端设备和所述装置属于所述目标分组。
  25. 如权利要求24所述的装置，其特征在于，所述收发单元具体用于：
    在车到所有V2X层接收所述第一侧行链路信令；
    以及，所述装置还包括：
    处理单元，用于通过所述V2X层向所述装置的接入层AS发送所述装置为组播通信分配的源标识和所述装置的AS配置信息。
  26. 如权利要求25所述的装置，其特征在于，装置的AS配置信息包括第一AS配置信息；
    以及，所述处理单元还用于：
    在所述AS根据所述第一AS配置信息，确定第一反馈资源，所述第一反馈资源用于所述装置对所述第一终端设备发起的所述组播通信进行混合自动重传请求HARQ反馈。
  27. 如权利要求26所述的装置，其特征在于，所述处理单元还用于：
    在所述AS根据所述第一AS配置信息，确定至少一个第二反馈资源，所述至少一个第二反馈资源与所述目标分组中除所述装置以外的终端设备一一对应，任一第二反馈资源 用于所述装置对所述第二反馈资源对应的终端设备发起的所述组播通信进行HARQ反馈。
  28. 如权利要求26或27所述的装置，其特征在于，所述装置的AS配置信息还包括至少一个第二AS配置信息；
    以及，所述处理单元还用于：
    在所述AS根据所述至少一个第二AS配置信息，确定所述目标分组中除所述装置以外的任一终端设备对应的反馈资源，其中，第三终端设备的反馈资源包括至少一个第三反馈资源，所述至少一个第三反馈资源与所述目标分组中除所述第三终端设备以外的终端设备一一对应，任一第三反馈资源用于所述第三终端设备对所述第三反馈资源对应的终端设备发起的所述组播通信进行HARQ反馈，所述第三终端设备为所述目标分组中除所述装置以外的任一终端设备。
  29. 如权利要求26或27所述的装置，其特征在于，所述收发单元还用于：
    向所述第一终端设备发送第二侧行链路信令，所述第二侧行链路信令包括第三AS配置信息；
    以及，所述处理单元还用于：
    根据所述第三AS配置信息，确定第四反馈资源，所述第四反馈资源用于所述第一终端设备对所述装置发起的所述组播通信进行混合自动重传请求HARQ反馈。
  30. 如权利要求24至29中任一项所述的装置，其特征在于，所述第一侧行链路信令还包括所述目标分组中除所述装置以外的其他各终端设备分别为所述组播通信分配的源标识以及所述各终端设备的AS配置信息。
  31. 一种通信方法，其特征在于，包括：
    第一终端设备向第二终端设备发送接入层AS配置信息，并启动所述第一终端设备与所述第二终端设备之间的单播连接关联的第一定时器；
    在所述第一定时器运行期间，若所述第一终端设备接收到所述第二终端设备发送的对所述AS配置信息的响应消息，所述第一终端设备停止所述第一定时器；或者，
    在所述第一定时器超时时，若所述第一终端设备未接收到所述第二终端设备发送的对所述AS配置信息的响应消息，所述第一终端设备确定基于所述AS配置信息的配置失败。
  32. 如权利要求31所述的方法，其特征在于，所述启动所述第一终端设备与所述第二终端设备之间的单播连接关联的第一定时器，包括：
    所述第一终端设备在其无线资源控制RRC实体生成侧行链路RRC消息并发送给所述RRC实体的底层时，启动所述第一定时器，其中所述RRC消息包括所述AS配置信息。
  33. 如权利要求31或32所述的方法，其特征在于，所述方法还包括：
    在所述第一定时器超时的情况下，所述第一终端设备向网络设备发送指示信息，所述指示信息用于指示所述第一定时器超时。
  34. 如权利要求31至33中任一项所述的方法，其特征在于，在所述第一定时器超时时，若所述第一终端设备未接收到所述第二终端设备发送的对所述AS配置信息的响应消息，所述方法还包括下述中的一项或多项：
    所述第一终端设备停止通过所述单播连接向所述第二终端设备进行传输；
    所述第一终端设备释放所述单播连接的发送缓存，所述发送缓存包括下述中的一项或多项：待发送的资源请求SR、待发送的缓存状态报告BSR、待发送的数据；
    所述第一终端设备的AS向上层指示在所述第一定时器超时时所述第一终端设备未接收到所述第二终端设备发送的对所述AS配置信息的响应消息，所述上层为车到所有V2X层或者应用层；
    在所述V2X层接收到所述AS发送的指示的情况下，所述V2X层发起单播连接释放流程，并且所述V2X层指示所述AS释放所述单播连接的AS配置；
    所述AS释放所述单播连接的AS配置，并且向所述V2X层指示所述AS已释放所述单播连接的AS配置；
    所述AS向应用层指示针对所述单播连接的侧行链路不可用。
  35. 如权利要求31至34中任一项所述的方法，其特征在于，在所述第一定时器超时时，若所述第一终端设备未接收到所述第二终端设备发送的对所述AS配置信息的响应消息，所述方法还包括：
    所述第一终端设备进行所述单播连接链路恢复。
  36. 如权利要求35所述的方法，其特征在于，所述第一终端设备进行所述单播连接链路恢复，包括：
    所述第一终端设备进行所述单播连接链路恢复，并启动第二定时器；
    以及，所述方法还包括：
    若在所述第二定时器运行期间，所述单播链路链路恢复成功，停止所述第二定时器。
  37. 一种通信装置，其特征在于，包括：
    收发单元，用于向第二终端设备发送接入层AS配置信息；
    处理单元，启动所述第一终端设备与所述第二终端设备之间的单播连接关联的第一定时器；
    所述处理单元还用于，在所述第一定时器运行期间，若所述收发单元接收到所述第二终端设备发送的对所述AS配置信息的响应消息，停止所述第一定时器；或者，
    在所述第一定时器超时时，若所述收发单元未接收到所述第二终端设备发送的对所述AS配置信息的响应消息，确定基于所述AS配置信息的配置失败。
  38. 如权利要求37所述的装置，其特征在于，所述处理单元具提用于：
    在所述装置的其无线资源控制RRC实体生成侧行链路RRC消息并发送给所述RRC实体的底层时，启动所述第一定时器，其中所述RRC消息包括所述AS配置信息。
  39. 如权利要求37或38所述的装置，其特征在于，所述收发单元还用于：
    在所述第一定时器超时的情况下，向网络设备发送指示信息，所述指示信息用于指示所述第一定时器超时。
  40. 如权利要求31至34中任一项所述的方法，其特征在于，所述处理单元还用于：
    进行所述单播连接链路恢复。
  41. 一种通信装置，其特征在于，包括：处理器，所述处理器与存储器耦合，所述存储器用于存储程序或指令，当所述程序或指令被所述处理器执行时，使得所述装置执行如权利要求1至15中任一项或者31至36中任一项所述的方法。
  42. 一种可读存储介质，其上存储有计算机程序或指令，其特征在于，所述计算机程序或指令被执行时使得计算机执行如权利要求1至15中任一项或者31至36中任一项所述的方法。
  43. 一种计算机程序产品，其特征在于，包括计算机程序指令，该计算机程序指令使得计算机执行：如权利要求1至15中任一项或者31至36中任一项所述的方法。
PCT/CN2020/109270 2019-08-16 2020-08-14 通信方法和通知装置 Ceased WO2021032008A1 (zh)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP20853793.6A EP4017042A4 (en) 2019-08-16 2020-08-14 COMMUNICATION PROCESS AND COMMUNICATION DEVICE
EP23166372.5A EP4236396A3 (en) 2019-08-16 2020-08-14 Communication method and communication device
US17/671,649 US20220174458A1 (en) 2019-08-16 2022-02-15 Communication method and communication apparatus
US19/042,900 US20250184700A1 (en) 2019-08-16 2025-01-31 Communication method and communication apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910760892.8 2019-08-16
CN201910760892.8A CN112399374B (zh) 2019-08-16 2019-08-16 通信方法和通信装置

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US17/671,649 Continuation US20220174458A1 (en) 2019-08-16 2022-02-15 Communication method and communication apparatus

Publications (1)

Publication Number Publication Date
WO2021032008A1 true WO2021032008A1 (zh) 2021-02-25

Family

ID=74603118

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/109270 Ceased WO2021032008A1 (zh) 2019-08-16 2020-08-14 通信方法和通知装置

Country Status (4)

Country Link
US (2) US20220174458A1 (zh)
EP (2) EP4236396A3 (zh)
CN (2) CN112399374B (zh)
WO (1) WO2021032008A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4447526A4 (en) * 2021-12-31 2025-01-15 Huawei Technologies Co., Ltd. Data transmission method and apparatus

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110291839B (zh) * 2019-05-17 2023-06-06 北京小米移动软件有限公司 单播连接建立方法、装置及存储介质
US11750330B2 (en) * 2019-08-29 2023-09-05 Qualcomm Incorporated Radio link monitoring for sidelink communications
WO2021069358A1 (en) * 2019-10-07 2021-04-15 Telefonaktiebolaget Lm Ericsson (Publ) Security for groupcast message in d2d communication
US11683727B2 (en) * 2021-03-31 2023-06-20 Qualcomm Incorporated Coexistence of redcap and non-redcap UEs in SL
US20230100366A1 (en) * 2021-09-24 2023-03-30 Qualcomm Incorporated Signaling details of network coded transmissions
WO2023050368A1 (zh) * 2021-09-30 2023-04-06 北京小米移动软件有限公司 一种链路失败处理方法、装置、设备及存储介质
CN116193373A (zh) * 2021-11-29 2023-05-30 大唐移动通信设备有限公司 一种通信方法及终端
CN119364560A (zh) * 2022-04-02 2025-01-24 华为技术有限公司 中继通信方法与装置
CN115606313B (zh) * 2022-08-05 2025-10-03 北京小米移动软件有限公司 直连sidelink终端设备间内部协调信息请求的发送方法及其装置
CN115988431B (zh) * 2022-12-02 2024-07-12 中国联合网络通信集团有限公司 一种对讲通信系统、方法及装置
US12526086B2 (en) 2023-08-03 2026-01-13 Dell Products L.P. Detecting unresponsive user equipment
US12588096B2 (en) 2023-08-03 2026-03-24 Dell Products L.P. Performing iterations of transmitting a keep alive signal according to a packet data convergence protocol data unit format

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108432309A (zh) * 2015-11-06 2018-08-21 太阳专利托管公司 在侧行链路控制时段期间的多侧行链路控制传输
CN111436026A (zh) * 2019-02-18 2020-07-21 维沃移动通信有限公司 副链路组播通信的配置方法和终端

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2677072C (en) * 2007-03-21 2014-01-21 Nokia Corporation Method, apparatus and computer program product for handover failure recovery
US20100157870A1 (en) * 2008-12-19 2010-06-24 Qualcomm Incorporated Managing a multicast group membership table at an access network within a wireless communications system
US10805971B2 (en) * 2016-02-05 2020-10-13 Telefonaktiebolaget Lm Ericsson (Publ) Allowance of a sidelink communication operation
US10194459B2 (en) * 2016-02-18 2019-01-29 Lg Electronics Inc. Method of transmitting and receiving message for communication between UEs in wireless communication system and apparatus using method
WO2020006726A1 (en) * 2018-07-05 2020-01-09 Qualcomm Incorporated Methods and apparatus related to a platooning group
US12047849B2 (en) * 2018-11-08 2024-07-23 Lenovo (Beijing) Limited Method and apparatus for groupcast connection establishment and transmission

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108432309A (zh) * 2015-11-06 2018-08-21 太阳专利托管公司 在侧行链路控制时段期间的多侧行链路控制传输
CN111436026A (zh) * 2019-02-18 2020-07-21 维沃移动通信有限公司 副链路组播通信的配置方法和终端

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
ERICSSON: "On the Support of HARQ/CSI feedbacks Over Sidelink", 3GPP DRAFT; R2-1817957 - ON THE SUPPORT OF HARQ CSI FEEDBACKS OVER SIDELINK, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Spokane, WA, USA; 20181112 - 20181116, 12 November 2018 (2018-11-12), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051557465 *
HUAWEI, HISILICON: "A V2X group member discovery for groupcast communication", 3GPP DRAFT; S2-1907629 23287 A V2X GROUP MEMBER DISCOVERY FOR GROUPCAST COMMUNICATION_V4, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. SA WG2, no. Sapporo, Japan; 20190624 - 20190628, 18 June 2019 (2019-06-18), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, pages 1 - 7, XP051752595 *
HUAWEI, HISILICON: "Identifier assignment to enable Option2 groupcast HARQ feedback", 3GPP DRAFT; R2-1913705 IDENTIFIER ASSIGNMENT TO ENABLE OPTION2 GROUPCAST HARQ, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Chongqing, China; 20191014 - 20191018, 4 October 2019 (2019-10-04), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051791697 *
KYOCERA: "PC5-RRC state considerations", 3GPP DRAFT; R2-1907180_V2X_RRC_STATE, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Reno, USA; 20190513 - 20190517, 13 May 2019 (2019-05-13), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051730624 *
QUALCOMM INCORPORATED: "Physical layer procedures for sidelink", 3GPP DRAFT; R1-1907274_PHYSICAL LAYER PROCEDURES FOR SIDELINK, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Reno, USA; 20190513 - 20190517, 13 May 2019 (2019-05-13), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051728714 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4447526A4 (en) * 2021-12-31 2025-01-15 Huawei Technologies Co., Ltd. Data transmission method and apparatus

Also Published As

Publication number Publication date
US20250184700A1 (en) 2025-06-05
EP4017042A4 (en) 2022-10-05
EP4017042A1 (en) 2022-06-22
CN112399374A (zh) 2021-02-23
CN115052260A (zh) 2022-09-13
EP4236396A3 (en) 2023-10-25
CN112399374B (zh) 2022-07-12
US20220174458A1 (en) 2022-06-02
EP4236396A2 (en) 2023-08-30
CN115052260B (zh) 2024-10-15

Similar Documents

Publication Publication Date Title
CN115052260B (zh) 通信方法和通信装置
CN111148077B (zh) 传输方法和装置
US12028169B2 (en) Wireless communication method, receiving-end device, and sending-end device
WO2021022687A1 (zh) 通信方法、建立slrb的方法和通信装置
US20230422346A1 (en) Multicast service receiving method, multicast service configuration method, terminal, and network side device
US9042356B2 (en) Method and apparatus for confirming delivery of group data to radio communication devices in a wireless communication system
WO2020143731A1 (zh) 用于传输数据的方法、通信设备和网络设备
CN115088215B (zh) 一种数据传输方法及装置
CN108781135B (zh) 物联网的传输优化方法、装置和设备
US20260059269A1 (en) Communication control method and user equipment
CN111294166B (zh) 业务传输与业务配置的发送方法及装置、存储介质、终端、基站
WO2020143510A1 (zh) 一种通信方法及装置
US20210219171A1 (en) Communication method and device
WO2023093364A1 (zh) 一种通信方法和装置
CN118235353B (zh) 无线通信方法和通信设备
CN113475024B (zh) 通信方法、装置、设备、系统及存储介质
WO2021134233A1 (zh) 通信方法、终端设备和网络设备
CN116349290A (zh) 通信控制方法
CN112235731B (zh) 一种通信方法、装置和系统
CN111937416B (zh) 用于在移动通信系统中提供蜂窝物联网服务的方法和装置
CN116097841B (zh) 无线通信的方法、终端设备和网络设备
WO2022151964A1 (zh) 一种数据传输方法及装置
CN116095611A (zh) 组播业务的数据传输方法、通信装置及存储介质
EP4468782A1 (en) Communication method and communication apparatus
WO2025031158A1 (zh) 一种通信方法及装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20853793

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2020853793

Country of ref document: EP

Effective date: 20220316