5.20b.2 Support LADN service area for a group

The procedure as defined in clause 4.15.6.2 of TS 23.502 [3] is applicable for provisioning of LADN service area for a group with the following clarifications and enhancements:

• The AF request additionally contains the LADN service area as part of DNN and S-NSSAI specific Group Parameters and the LADN service area is stored in UDR as subscription data and delivered to AMF. If the AMF receives the LADN service area for a group, the AMF configures the DNN of the group as LADN DNN.
• If the AF provides the LADN service area in the form of geographical information, the NEF maps the geographical information to a list of TAs before sending the service area to the UDM.

LADN per DNN and S-NSSAI as defined in clause 5.6.5a is applicable for enforcement of LADN service area.