US 12,439,427 B2
PTM retransmission reception by UES in RRC_INACTIVE/idle with DRX
Esa Mikael Malkamäki, Espoo (FI); Ugur Baran Elmali, Munich (DE); Subin Narayanan, Oulu (FI); and Dariush M. Soleymani, Ulm (DE)
Assigned to Nokia Technologies Oy, Espoo (FI)
Appl. No. 18/857,607
Filed by Nokia Technologies Oy, Espoo (FI)
PCT Filed May 31, 2024, PCT No. PCT/EP2024/064981
§ 371(c)(1), (2) Date Oct. 17, 2024,
PCT Pub. No. WO2025/026602, PCT Pub. Date Feb. 6, 2025.
Claims priority of application No. 20235850 (FI), filed on Jul. 31, 2023.
Prior Publication US 2025/0261204 A1, Aug. 14, 2025
Int. Cl. H04W 72/23 (2023.01); H04L 1/1829 (2023.01); H04W 76/27 (2018.01); H04W 76/28 (2018.01); H04W 76/40 (2018.01)
CPC H04W 72/23 (2023.01) [H04L 1/1848 (2013.01); H04W 76/27 (2018.02); H04W 76/28 (2018.02); H04W 76/40 (2018.02)] 20 Claims
OG exemplary drawing
 
1. A User Equipment, UE, comprising:
at least one processor, and
at least one memory storing instructions that, when executed by the at least one processor, cause the UE at least to, during or before a Multicast/Broadcast Service, MBS, session:
receive, from a network node, a configuration message configuring at least one Retransmission Timer;
receive, while the UE is in an inactive state or an idle state, a Physical Downlink Control Channel, PDCCH, transmission that is associated with the MBS session and that schedules a Transport Block, TB, of the MBS session with a group identifier identifying a group of UEs comprising the UE in the inactive or idle state and one or more UEs in a connected state;
receive the scheduled TB in the inactive or idle state, via Point-To-Multipoint, PTM, Physical Downlink Shared Channel, PDSCH transmission associated with the MBS session; and
in case of determining a failure in decoding the received TB:
start the at least one Retransmission Timer based on the configuration message; and
monitor, before the at least one Retransmission Timer expires, a PDCCH for at least one PTM retransmission for the failed TB requested by the one or more UEs in the connected state via at least one Hybrid Automatic Repeat Request, HARQ, feedback to the network node.