US 12,219,646 B2
Operation method of relay UE for remote UE
Laeyoung Kim, Seoul (KR); and Myungjune Youn, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Appl. No. 17/636,295
Filed by LG Electronics Inc., Seoul (KR)
PCT Filed Aug. 21, 2020, PCT No. PCT/KR2020/011168
§ 371(c)(1), (2) Date Feb. 17, 2022,
PCT Pub. No. WO2021/034142, PCT Pub. Date Feb. 25, 2021.
Claims priority of application No. 10-2019-0103122 (KR), filed on Aug. 22, 2019.
Prior Publication US 2022/0304099 A1, Sep. 22, 2022
Int. Cl. H04W 76/27 (2018.01); H04W 76/30 (2018.01); H04W 88/04 (2009.01)
CPC H04W 76/27 (2018.02) [H04W 76/30 (2018.02); H04W 88/04 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method performed by a first terminal in a wireless communication system, the method comprising:
establishing, by the first terminal, one-to-one direct communication with a second terminal;
establishing, by the first terminal, a radio bearer in which a session of the first terminal is added;
based on the radio bearer supporting a session of the second terminal, modifying, by the first terminal, the radio bearer to add the session of the second terminal,
wherein modifying the radio bearer comprises receiving, from a base station, a first reconfiguration message including i) identification (ID) information for the radio bearer, ii) ID information for the second terminal, iii) information informing that the radio bearer is shared by the first terminal and the second terminal, and iv) information for the session of the second terminal;
receiving, by the first terminal, a second reconfiguration message from the base station,
wherein the second reconfiguration message includes i) the ID information for the radio bearer and ii) information for the session of the first terminal to be deleted or released in the radio bearer; and
delivering, by an Access Stratum (AS) layer of the first terminal to a Non-Access Stratum (NAS) layer of the first terminal, information informing that a user plane connection of the session of the first terminal is released, based on the received second reconfiguration message.