Patent ID: 11882435
Assignee: APPLE INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. A method for wireless communications by an access and mobility management function (AMF), comprising:
processing group information associated with a multicast/broadcast (MB) session context received from an application function (AF), at least a portion of the group information comprising a temporary mobile group identity (TMGI);
processing a plurality of MB session join requests received from a plurality of user equipment (UEs), each of the plurality of MB session join requests including the TMGI and being associated with the MB session context;
in response to processing the plurality of UE MB session join requests, encoding an MB session request associated with the MB session context for transmission to an MB-session management function (MB-SMF);
processing an MB session response associated with the MB session context received from the MB-SMF, the MB session response including a key derived for each of the plurality of UEs using a UE ID associated with each of the plurality of UEs and the TMGI, each derived key to be delivered by point-to-point (PTP) delivery or point-to-multipoint (PTM) delivery, wherein each derived key to be delivered by PTP is identical to each derived key to be delivered by PTM; and
encoding a downlink (DL) non-access stratum (NAS) message for transmitting to each of the plurality of UEs and an N2 message for transmitting to a base station, both the DL NAS message and the N2 message including the derived key.