Section: 4.15.6.3g Network Slice Usage Control parameters for dedicated S-NSSAI to a single AF
Content: An AF having a S-NSSAI dedicated to it may be authorized, to control the parameters to remove the S-NSSAI from the Allowed NSSAI or release a PDU Session associated with the S-NSSAI. In this case, these parameters may be provided by an authorized AF via the NEF and be stored as part of the subscriber data. The provision procedure of the Network Slice Usage Control Parameters is realized by external parameter provision procedure as described in clause 4.15.6.2. The AMF and SMF use the Network Slice Usage Control parameter as described in clause 5.15.15 of TS 23.501[ System architecture for the 5G System (5GS) ]  [2]. Table 4.15.6.3g-1: Description of Network Slice Usage Control parameters According to the received network slice usage control parameter, the UDM updates all related UE subscription data which includes the indicated S-NSSAI. Only in this case and for subscribers having such an S-NSSAI a subscribed S-NSSAI, the slice deregistration inactivity timer value and/or PDU Session inactivity timer value is obtained by the AMF or SMF as part of the subscription data respectively as specified in clauses 4.2.2.2.2 and 4.3.2.2.1.