# US 12,114,204 B2 · Apparatus and method for supporting unicast transmission between user equipments in wireless communication system

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- Number: US 12,114,204 B2
- Document ID: US12114204B2
- Status: Granted
- Kind: B2
- Application number: 18/482,630
- Filed: 2023-10-06
- Published: 2024-02-08
- Granted: 2024-10-08
- Earliest claimed: 2018-10-08
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Hyunjeong Kang; Sangkyu Baek
- Web page: https://patentgrep.com/patent/US12114204B2

## CPC

- 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 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 4/70: Services for machine-to-machine communication [M2M] or machine type communication [MTC]
- H04W 28/02: Traffic management, e.g. flow control or congestion control
- H04W 76/14: Direct-mode setup
- H04W 76/27: Transitions between radio resource control [RRC] states
- H04W 76/40: for selective distribution or broadcast
- H04W 80/02: Data link layer protocols
- H04L 45/121: by minimising delays
- H04W 4/023: {using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds}
- H04W 4/46: for vehicle-to-vehicle communication [V2V]
- 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)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

The disclosure relates to a 5th generation (5G) or a pre-5G communication system provided to support a higher data transfer rate than a system after a 4th generation (4G) communication system such as long term evolution (LTE). An operation method of a terminal in a wireless communication system includes: obtaining an RLC transmission mode and RLC configuration information in the process of determining a V2X service requiring configuration of a unicast session and configuring the unicast session with another terminal; if the terminal is determined to be in the coverage of a base station, receiving an RLC transmission mode and RLC configuration information from the base station; and if it is determined that the terminal is not located in a base station coverage, obtaining a pre-configured unicast session and pre-configured RLC configuration information for each RLC transmission mode, which is mapped to a V2X service.

## Claims

### Claim 1

A method performed by a first terminal, the method comprising:
transmitting, to a base station, a first message including a destination identity, transmission type information, radio link control (RLC) mode information, and quality of service (QoS) information;
receiving, from the base station, a second message including sidelink RLC configuration information associated with an RLC mode based on the first message; and
transmitting, to a second terminal, a third message comprising the sidelink RLC configuration information based on the second message,
wherein the sidelink RLC configuration information is configured by the second terminal based on the third message.

### Claim 2 (depends on 1)

The method of claim 1, wherein the transmission type information corresponds to at least one of unicast, groupcast, or broadcast.

### Claim 3 (depends on 1)

The method of claim 1,
wherein the second message is a radio resource control (RRC) message in case that the first terminal is in a connected mode, or
wherein the second message is a system information block (SIB) in case that the first terminal is in an idle mode or an inactive mode.

### Claim 4

A method performed by a base station, the method comprising:
receiving, from a first terminal, a first message including a destination identity, transmission type information, radio link control (RLC) mode information, and quality of service QoS) information;
determining an RLC mode, based on the first message; and
transmitting, to the first terminal, a second message including sidelink RLC configuration information associated with the RLC mode,
wherein the sidelink RLC configuration information is configured by a second terminal.

### Claim 5 (depends on 4)

The method of claim 4, wherein the transmission type information corresponds to at least one of unicast, groupcast, or broadcast.

### Claim 6 (depends on 4)

The method of claim 4,
wherein the second message is a radio resource control (RRC) message in case that the first terminal is in a connected mode, or
wherein the second message is a system information block (SIB) in case that the first terminal is in an idle mode or an inactive mode.

### Claim 7

A first terminal in a wireless communication system, the first terminal comprising:
a transceiver unit; and
a control unit connected to the transceiver unit, the control unit configured to:
transmit, to a base station, a first message including a destination identity, transmission type information, radio link control (RLC) mode information, and quality of service (QoS) information,
receive, from the base station, a second message including sidelink RLC configuration information associated with an RLC mode based on the first message, and
transmit, to a second terminal, a third message comprising the sidelink RLC configuration information based on the second message,
wherein the sidelink RLC configuration information is configured by the second terminal based on the third message.

### Claim 8 (depends on 7)

The first terminal of claim 7, wherein the transmission type information corresponds to at least one of unicast, groupcast, or broadcast.

### Claim 9 (depends on 7)

The first terminal of claim 7,
wherein the second message is a radio resource control (RRC) message in case that the first terminal is in a connected mode, or
wherein the second message is a system information block (SIB) in case that the first terminal is in an idle mode or an inactive mode.

### Claim 10

A base station in a wireless communication system, the base station comprising:
a transceiver unit; and
a control unit connected to the transceiver unit, the control unit configured to:
receive, from a first terminal, a first message including a destination identity, transmission type information, radio link control (RLC) mode information, and quality of service (QoS) information,
determine an RLC mode, based on the first message, and
transmit, to the first terminal, a second message including sidelink RLC configuration information associated with the RLC mode,
wherein the sidelink RLC configuration information is configured by a second terminal.

### Claim 11 (depends on 10)

The base station of claim 10, wherein the transmission type information corresponds to at least one of unicast, groupcast, or broadcast.

### Claim 12 (depends on 10)

The base station of claim 10,
wherein the second message is a radio resource control (RRC) message in case that the first terminal is in a connected mode, or
wherein the second message is a system information block (SIB) in case that the first terminal is in an idle mode or an inactive mode.