# US 12,010,592 B2 · Sidelink communications method and apparatus

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- Number: US 12,010,592 B2
- Document ID: US12010592B2
- Status: Granted
- Kind: B2
- Application number: 17/213,911
- Filed: 2021-03-26
- Published: 2021-07-15
- Granted: 2024-06-11
- Earliest claimed: 2018-09-28
- Assignees: Huawei Technologies Co., Ltd.
- Applicants: Huawei Technologies Co., Ltd.
- Inventors: Qiang Fan; Jun Wang; Mingzeng Dai
- Web page: https://patentgrep.com/patent/US12010592B2

## CPC

- H04W 4/06: Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
- H04W 4/40: for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W 4/46: for vehicle-to-vehicle communication [V2V]
- H04W 12/10: Integrity
- H04W 28/0268: {using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR] (negotiating SLA or negotiating QoS H04W28/24)}
- H04W 76/11: Allocation or use of connection identifiers
- H04W 76/40: for selective distribution or broadcast
- H04W 80/02: Data link layer protocols
- H04W 76/14: Direct-mode setup
- H04W 92/18: between terminal devices
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

A communications method that meets QoS requirements of services of different communication types, including: an application layer entity of a first terminal device delivers communication type information and a target side identifier to a control layer entity of the first terminal device; the control layer entity of the first terminal device establishes, based on the communication type information, a radio bearer group that is of a sidelink and that corresponds to a communication type, where the radio bearer group of the sidelink corresponds to the target side identifier.

## Claims

### Claim 1

A communication method, wherein the method comprises:
sending, at a first protocol layer entity of a first terminal device, communication type information and a target side identifier to a second protocol layer entity of the first terminal device, wherein the communication type information identifies a unicast communication, and the target side identifier comprises an identifier of a second terminal device; and
establishing, at the second protocol layer entity of the first terminal device, at least one radio bearer for unicast communication, wherein the at least one radio bearer corresponds to the target side identifier.

### Claim 2 (depends on 1)

The method according to claim 1, wherein
configuration information of the at least one radio bearer is prestored in the first terminal device.

### Claim 3 (depends on 1)

The method according to claim 1, wherein the method further comprises:
sending, at the second protocol layer entity of the first terminal device, a first message to a second protocol layer entity of the second terminal device, wherein the first terminal device and the second terminal device are performing or are to perform the unicast communication, and the first message comprises configuration information of the at least one radio bearer; and
receiving, at the second protocol layer entity of the first terminal device, a second message in response to the first message from the second terminal device.

### Claim 4 (depends on 3)

The method according to claim 3, wherein the method further comprises:
when the second protocol layer entity of the first terminal device does not receive the second message in a duration greater than or equal to a specified duration, resending, at the second protocol layer entity of the first terminal device, the first message to the second protocol layer entity of the second terminal device.

### Claim 5 (depends on 3)

The method according to claim 3, wherein the method further comprises:
determining, at the second protocol layer entity of the first terminal device, a security mode configuration that is to be used by the first terminal device to perform confidentiality protection and integrity protection on the first message; and
wherein sending, at the second protocol layer entity of the first terminal device, the first message to the second protocol layer entity of the second terminal device comprises: sending, at the second protocol layer entity of the first terminal device, the first message and the security mode configuration to a packet data convergence protocol (PDCP) layer entity of the first terminal device, wherein after performing the confidentiality protection and the integrity protection on the first message based on the security mode configuration, the PDCP layer entity of the first terminal device sends the first message to the second protocol layer entity of the second terminal device.

### Claim 6 (depends on 1)

The method according to claim 1, wherein the method further comprises:
broadcasting, at the first protocol layer entity of the first terminal device, an establishment request, wherein the establishment request requests to establish the unicast communication; and
receiving, at the first protocol layer entity of the first terminal device, an establishment response, wherein the establishment response indicates to establish the unicast communication with the first terminal device.

### Claim 7

A communication apparatus, comprising:
at least one processor, and a memory storing instructions that are executable by the at least one processor;
wherein, when executed, the instructions cause the apparatus to perform operations comprising:
sending, at a first protocol layer entity of the communication apparatus, communication type information and a target side identifier to a second protocol layer entity of the communication apparatus, wherein the communication type information identifies a unicast communication, and the target side identifier comprises an identifier of a second terminal device; and
establishing, at the second protocol layer entity of the communication apparatus, at least one radio bearer for unicast communication, wherein the at least one radio bearer corresponds to the target side identifier.

### Claim 8 (depends on 7)

The communication apparatus according to claim 7, wherein configuration information of the at least one radio bearer is prestored in the communication apparatus.

### Claim 9 (depends on 7)

The communication apparatus according to claim 7, wherein, when executed, the instructions cause the communication apparatus further to perform:
sending, at the second protocol layer entity of the communication apparatus, a first message to a second protocol layer entity of the second terminal device, wherein the communication apparatus and the second terminal device are performing or are to perform the unicast communication, and the first message comprises configuration information of the at least one radio bearer; and
receiving, at the second protocol layer entity of the communication apparatus, a second message in response to the first message from the second terminal device.

### Claim 10 (depends on 9)

The communication apparatus according to claim 9, wherein, when executed, the instructions cause the communication apparatus further to perform:
when the second protocol layer entity of the communication apparatus does not receive the second message in a duration greater than or equal to a specified duration, resending, at the second protocol layer entity of the communication apparatus, the first message to the second protocol layer entity of the second terminal device.

### Claim 11 (depends on 9)

The communication apparatus according to claim 9, wherein, when executed, the instructions cause the communication apparatus further to perform:
determining, at the second protocol layer entity of the communication apparatus, a security mode configuration that is to be used by the communication apparatus to perform confidentiality protection and integrity protection on the first message; and
wherein sending, by the second protocol layer entity of the communication apparatus, the first message to the second protocol layer entity of the second terminal device comprises: sending, at the second protocol layer entity of the communication apparatus, the first message and the security mode configuration to a packet data convergence protocol (PDCP) layer entity of the communication apparatus, wherein after performing the confidentiality protection and the integrity protection on the first message based on the security mode configuration, the PDCP layer entity of the communication apparatus sends the first message to the second protocol layer entity of the second terminal device.

### Claim 12 (depends on 7)

The communication apparatus according to claim 7, wherein, when executed, the instructions cause the communication apparatus further to perform:
broadcasting, at the first protocol layer entity of the communication apparatus, an establishment request, wherein the establishment request requests to establish the unicast communication; and
receiving, at the first protocol layer entity of the communication apparatus, an establishment response, wherein the establishment response indicates to establish the unicast communication with the communication apparatus.

### Claim 13

A non-transitory memory storage medium comprising computer-executable instructions that, when executed, cause a first terminal device to perform:
sending, at a first protocol layer entity of the first terminal device, communication type information and a target side identifier to a second protocol layer entity of the first terminal device, wherein the communication type information identifies a unicast communication, and the target side identifier comprises an identifier of a second terminal device; and
establishing, at the second protocol layer entity of the first terminal device, at least one radio bearer for unicast communication, wherein the at least one radio bearer correspond to the target side identifier.

### Claim 14 (depends on 13)

The non-transitory memory storage medium according to claim 13,
wherein configuration information of the at least one radio bearer is prestored in the first terminal device.

### Claim 15 (depends on 13)

The non-transitory memory storage medium according to claim 13, wherein the instructions, when executed, cause the first terminal device further to perform:
sending, at the second protocol layer entity of the first terminal device, a first message to a second protocol layer entity of the second terminal device, wherein the first terminal device and the second terminal device are performing or are to perform the unicast communication, and the first message comprises configuration information of the at least one radio bearer; and
receiving, at the second protocol layer entity of the first terminal device, a second message in response to the first message from the second terminal device.

### Claim 16 (depends on 15)

The non-transitory memory storage medium according to claim 15, wherein the instructions, when executed, cause the first terminal device further to perform:
when the second protocol layer entity of the first terminal device does not receive the second message in a duration greater than or equal to a specified duration, resending, at the second protocol layer entity of the first terminal device, the first message to the second protocol layer entity of the second terminal device.

### Claim 17 (depends on 15)

The non-transitory memory storage medium according to claim 15, wherein the instructions, when executed, cause the first terminal device further to perform:
determining, at the second protocol layer entity of the first terminal device, a security mode configuration that is to be used by the first terminal device to perform confidentiality protection and integrity protection on the first message; and
wherein sending, at the second protocol layer entity of the first terminal device, the first message to the second protocol layer entity of the second terminal device comprises: sending, at the second protocol layer entity of the first terminal device, the first message and the security mode configuration to a packet data convergence protocol (PDCP) layer entity of the first terminal device, wherein after performing the confidentiality protection and the integrity protection on the first message based on the security mode configuration, the PDCP layer entity of the first terminal device sends the first message to the second protocol layer entity of the second terminal device.

### Claim 18 (depends on 13)

The non-transitory memory storage medium according to claim 13, wherein the instructions, when executed, cause the first terminal device further to perform:
broadcasting, at the first protocol layer entity of the first terminal device, an establishment request, wherein the establishment request requests to establish the unicast communication; and
receiving, at the first protocol layer entity of the first terminal device, an establishment response, wherein the establishment response indicates to establish the unicast communication with the first terminal device.