UE configuration may be updated by the network at any time using UE Configuration Update procedure. UE configuration includes:
Access and Mobility Management related parameters decided and provided by the AMF. This includes the Configured NSSAI and its mapping to the Subscribed S-NSSAIs, the Allowed NSSAI and its mapping to Subscribed S-NSSAIs, the Service Gap time and the list of Rejected NSSAIs if the UE Configuration Update procedure is triggered by the AMF after Network Slice-Specific Authentication and Authorization of S-NSSAIs. If the UE and the AMF support RACS, this may also include a PLMN-assigned UE Radio Capability ID or alternatively a PLMN-assigned UE Radio Capability ID deletion indication.
UE Policy provided by the PCF.
When AMF wants to change the UE configuration for access and mobility management related parameters the AMF initiates the procedure defined in clause 18.104.22.168
. When the PCF wants to change or provide new UE Policies in the UE, the PCF initiates the procedure defined in clause 22.214.171.124
If the UE Configuration Update procedure requires the UE to initiate a Registration procedure, the AMF indicates this to the UE explicitly.
The procedure in clause 126.96.36.199
may be triggered also when the AAA Server that performed Network Slice-Specific Authentication and Authorization for an S-NSSAI revokes the authorization.
Figure 188.8.131.52-1: UE Configuration Update procedure for access and mobility management related parameters
Figure 184.108.40.206-1: UE Configuration Update procedure for transparent UE Policy delivery