US 12,408,233 B2
Method and apparatus for stopping multicast and broadcast service in a wireless communication system
Daewook Byun, Seoul (KR); Jian Xu, Seoul (KR); and Seokjung Kim, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Appl. No. 18/014,638
Filed by LG Electronics Inc., Seoul (KR)
PCT Filed Jul. 14, 2021, PCT No. PCT/KR2021/009041
§ 371(c)(1), (2) Date Jan. 5, 2023,
PCT Pub. No. WO2022/015046, PCT Pub. Date Jan. 20, 2022.
Claims priority of application No. 10-2020-0088327 (KR), filed on Jul. 16, 2020.
Prior Publication US 2023/0262840 A1, Aug. 17, 2023
Int. Cl. H04W 8/18 (2009.01); H04W 4/06 (2009.01); H04W 76/22 (2018.01); H04W 76/34 (2018.01); H04W 76/40 (2018.01)
CPC H04W 76/40 (2018.02) [H04W 4/06 (2013.01); H04W 76/22 (2018.02); H04W 76/34 (2018.02)] 20 Claims
OG exemplary drawing
 
1. A method performed by a Central Unit (CU)-User Plane (UP) of a Radio Access Network (RAN) node in a wireless communication system, the method comprising,
receiving, from a CU-Control Plane (CP) of the RAN node, a first message to initiate a Multicast Listener Discovery (MLD) and/or Internet Group Management Protocol (IGMP) Leave procedure, wherein the first message includes (1) an identity for a Multicast and/or Broadcast (MB) service, and (2) a Transmission Stop Indication;
performing the MLD and/or IGMP Leave procedure for the MB service indicated by the identity for the MB service along with an MB-User Plane Function (UPF) based on the Transmission Stop Indication; and
transmitting, to the CU-CP of the RAN node, a second message informing that the MLD and/or IGMP Leave procedure is completed.