US 12,193,106 B2
Adaptive service areas for multicast session continuity
Joakim Åkesson, Landvetter (SE); Erik Stare, Sollentuna (SE); and Jie Ling, Shanghai (CN)
Assigned to Telefonaktiebolaget LM Ericsson (Publ), Stockholm (SE)
Appl. No. 17/785,535
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Dec. 11, 2020, PCT No. PCT/EP2020/085756
§ 371(c)(1), (2) Date Jun. 15, 2022,
PCT Pub. No. WO2021/122370, PCT Pub. Date Jun. 24, 2021.
Claims priority of application No. PCT/CN2019/125923 (WO), filed on Dec. 17, 2019.
Prior Publication US 2023/0011492 A1, Jan. 12, 2023
Int. Cl. H04H 20/71 (2008.01); H04W 76/40 (2018.01); H04W 92/20 (2009.01)
CPC H04W 76/40 (2018.02) [H04W 92/20 (2013.01)] 29 Claims
OG exemplary drawing
 
1. A method performed by a first radio access node in a Radio Access Network, RAN, for providing adaptive service areas in a multicast transmission session, the method comprising:
participating in a multicast transmission session for a service, comprising a multicast stream currently transmitted at least by the first radio access node to one or more User Equipment, UE, in a first cell;
providing, when a RAN decision is made to include cells of the first radio access node in the transmission of the service, a preparation notification to a second radio access node neighboring the first radio access node to prepare for mobility of the one or more UE to the neighbor second radio access node, the preparation notification comprising session information to prepare for the multicast transmission session for the service; and
deciding to include the second radio access node in the multicast transmission session, deciding to include the second radio access node in the multicast transmission session being based on a radio condition in the RAN comprising the first radio access node and the second radio access node, the radio condition including a signal strength for a UE having a Temporary Mobile Group Identity, TMGI, associated with the multicast transmission session.