7.1.3 MB-UPF discovery and selection for multicast/broadcast session

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

The selection and reselection of the MB-UPF are performed by the MB-SMF by considering MB-UPF deployment. For the local Broadcast/Multicast MBS session and location dependent MBS session, the service area is taken into consideration for MB-UPF selection.

MB-SMF may be locally configured with the information about the available MB-UPFs, e.g. by OA&M system when MB-UPF is instantiated or removed.

The MB-UPF selection functionality in the MB-SMF may optionally utilize the NRF to discover MB-UPF instance(s) which is similar with UPF selection with NRF defined in the TS 23.501 [5] clause 6.3.3.2.