US-12621902-B2 - Signaling method for sidelink communication DRX operation

US12621902B2US 12621902 B2US12621902 B2US 12621902B2US-12621902-B2

Abstract

A method for operation of a reception terminal comprises the steps of: carrying out, in a first link, SL communication with a first transmission terminal on the basis of a DRX operation according to first DRX configuration information; carrying out, in a second link, communication with a communication node without carrying out the DRX operation; generating, in the first link and the second link, second DRX configuration information for the DRX operation; transmitting the second DRX configuration information to the first transmission terminal and the communication node; and carrying out, in the first link and the second link, the DRX operation on the basis of the second DRX configuration information.

Inventors

Gene Back Hahn
Ui Hyun Hong
Hyuk Min SON

Assignees

HYUNDAI MOTOR COMPANY
KIA CORPORATION
WONKWANG UNIVERSITY CENTER FOR INDUSTRY-ACADEMY COOPERATION

Dates

Publication Date: 20260505
Application Date: 20230719
Priority Date: 20210203

Claims (13)

1 . A method of a first user equipment (UE), the method comprising: performing first sidelink (SL) communication with a second UE on a first link based on a discontinuous reception (DRX) operation according to first DRX configuration information; performing second SL communication with a third UE on a second link without performing the DRX operation; receiving common DRX configuration information for the DRX operation on the first link and the second link from a base station, the common DRX configuration information being applied to both the first SL and the second SL; and performing the DRX operation based on the common DRX configuration information on the first link and the second link.
2 . The method of claim 1 , wherein the common DRX configuration information is generated by changing the first DRX configuration information in consideration of the DRX operation on the second link.
3 . The method of claim 1 , further comprising: transmitting, to the second UE and the third UE, a DRX trigger indicator indicating that the DRX operation based on the common DRX configuration information is to be performed on the first link and the second link, wherein the DRX operation is performed on the first link and the second link after the transmitting of the DRX trigger indicator.
4 . The method of claim 1 , wherein the common DRX configuration information is transmitted when both a first trigger timer configured for the first link and a second trigger timer configured for the second link are expired.
5 . The method of claim 1 , wherein the common DRX configuration information includes information indicating a first common DRX cycle for the first link and the second link.
6 . The method of claim 1 , wherein the common DRX configuration information includes a common time offset applied to a common DRX cycle for the first link and the second link.
7 . The method of claim 1 , wherein the common DRX configuration information is configured based on a resource pool (RP)-specific scheme, a cell-specific scheme, or a user equipment (UE)-specific scheme.
8 . A first user equipment (UE) comprising: at least one processor, wherein the at least one processor causes the UE to: perform first sidelink (SL) communication with a second UE on a first link based on a discontinuous reception (DRX) operation according to first DRX configuration information; perform second SL communication with a third UE on a second link without performing the DRX operation; receive common DRX configuration information for the DRX operation on the first link and the second link from a base station, the common DRX configuration information being applied to both the first SL and the second SL; and perform the DRX operation based on the common DRX configuration information on the first link and the second link.
9 . The first UE of claim 8 , wherein the common DRX configuration information is generated by changing the first DRX configuration information in consideration of the DRX operation on the second link, and the common DRX configuration information is commonly applied to the first link and the second link.
10 . The first UE of claim 8 , wherein the at least one processor further causes the UE to transmit, to the second UE and the third UE, a DRX trigger indicator indicating that the DRX operation based on the common DRX configuration information is to be performed on the first link and the second link, wherein the DRX operation is performed on the first link and the second link after the transmitting of the DRX trigger indicator.
11 . The first UE of claim 8 , wherein the common DRX configuration information is transmitted when both a first trigger timer configured for the first link and a second trigger timer configured for the second link are expired.
12 . The first UE of claim 8 , wherein the common DRX configuration information includes information indicating a common DRX cycle for the first link and the second link.
13 . The first UE of claim 8 , wherein the common DRX configuration information includes a common time offset applied to a common DRX cycle for the first link and the second link.

Description

CROSS-REFERENCE TO RELATED APPLICATION The present application is a continuation-in-part of currently pending International Patent Application No. PCT/KR2022/001655, filed Jan. 28, 2022, which claims priority to Korean Patent Application No. 10-2021-0015744, filed Feb. 3, 2021, and Korean Patent Application No. 10-2022-0013400, filed Jan. 28, 2022, the entire contents of which is incorporated herein for all purposes by this reference. BACKGROUND OF THE PRESENT DISCLOSURE Field of the Present Disclosure The present disclosure relates to a sidelink communication technique, and more particularly, to a technique for communication based on sidelink discontinuous reception (SL DRX). Description of Related Art A fifth-generation (5G) communication system (e.g., New Radio (NR) communication system) which uses a frequency band higher than a frequency band of a fourth-generation (4G) communication system (e.g., Long Term Evolution (LTE) communication system or LTE-Advanced (LTE-A) communication system) as well as the frequency band of the 4G communication system has been considered for processing of wireless data. The 5G communication system can support Enhanced Mobile Broadband (eMBB) communications, Ultra-Reliable and Low-Latency communications (URLLC), massive Machine Type Communications (mMTC), and the like. The 4G communication system and 5G communication system can support Vehicle-to-Everything (V2X) communications. The V2X communications supported in a cellular communication system, such as the 4G communication system, the 5G communication system, and the like, may be referred to as “Cellular-V2X (C-V2X) communications.” The V2X communications (e.g., C-V2X communications) may include Vehicle-to-Vehicle (V2V) communications, Vehicle-to-Infrastructure (V2I) communications, Vehicle-to-Pedestrian (V2P) communication, Vehicle-to-Network (V2N) communication, and the like. In the cellular communication systems, the V2X communications (e.g., C-V2X communications) may be performed based on sidelink communication technologies (e.g., Proximity-based Services (ProSe) communication technology, Device-to-Device (D2D) communication technology, or the like). For example, sidelink channels for vehicles participating in V2V communications can be established, and communications between the vehicles can be performed using the sidelink channels. Sidelink communication may be performed using configured grant (CG) resources. The CG resources may be periodically configured, and periodic data (e.g., periodic sidelink data) may be transmitted using the CG resources. Meanwhile, resource allocation schemes in sidelink communication may be classified into a mode 1 and a mode 2. When the mode 1 is used, a base station may transmit configuration information (e.g., resource allocation information) for sidelink (SL) communication to a transmitting terminal through a Uu link. The transmitting terminal may receive the configuration information for SL communication from the base station. When the transmitting terminal operates in an idle mode on the Uu link between the base station and the transmitting terminal, this may affect a procedure for transmitting and receiving the configuration information for SL communication. Therefore, methods for efficiently operating a discontinuous reception (DRX) operation on the Uu link and a DRX operation on a sidelink are required. In addition, effective DRX-based communication methods and methods for reducing power consumption are required in a communication environment in which one Uu link and a plurality of sidelinks exist. The information disclosed in this Background of the present disclosure section is only for enhancement of understanding of the general background of the present disclosure and may not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art. BRIEF SUMMARY The present disclosure is directed to providing a method and an apparatus for sidelink discontinuous reception (SL DRX) based communication. An operation method of a receiving terminal, according to various exemplary embodiments of the present disclosure for achieving the above-described objective, may include: performing sidelink (SL) communication with a first transmitting terminal on a first link based on a discontinuous reception (DRX) operation according to first DRX configuration information; performing communication with a communication node on a second link without performing the DRX operation; generating second DRX configuration information for the DRX operation on the first link and the second link; transmitting the second DRX configuration information to the first transmitting terminal and the communication node; and performing the DRX operation based on the second DRX configuration information on the first link and the second link. The second DRX configuration information may be generated by changing the first DRX configuration informatio