7.2.9 AF provisioning multicast MBS Session Authorization information

23.2473GPPArchitectural enhancements for 5G multicast-broadcast servicesRelease 18TS

The AF provisions the multicast MBS session authorization information for multicast MBS sessions that are not open to "any UE". The procedure specified in clause 4.15.6.2 of TS 23.502 [6] is reused with the following enhancements:

– The AF may provision the MBS Session Authorization information to the 5GC. The MBS Session Authorization information is associated with a group of UEs.

Table 7.2.9-1: MBS Session Authorization information

Parameters	Description
MBS Session Authorization information	One or more MBS Session IDs.
	A group of UEs identified by an External Group ID.

– The AF may support multicast MBS group membership management and provide parameters as described in Table 7.2.9-2.

Table 7.2.9-2: Multicast MBS group membership management parameters

Parameters	Description
List of GPSI	List of multicast group members, each member is identified by GPSI.
External Group ID	Identifier for multicast MBS group.

– If a new multicast MBS group is created, the UDM shall assign a unique Internal Group ID for the multicast MBS group and include the newly assigned Internal Group ID in the Nudr_DM_Create Request message.

– If the AF is authorised by the UDM to provision the MBS Session Authorization information, the UDM resolves the GPSI of each MBS session group member to SUPI, and requests to create, update or delete the provisioned MBS Session Authorization information as part of the MBS subscription data for each SUPI via Nudr_DM_Create/Update/Delete Request message, and the message includes the provisioned MBS Session Authorization information.