4.11 UE configuration parameter updates

The 5GS in a PLMN supports updating UE parameters via NAS signalling. The feature enables the HPLMN to securely and dynamically re-configure the UE configuration parameters stored on the USIM and the ME.

• In this release of the specification, updates of the following USIM configuration parameters are supported:
• routing indicator.
• In this release of specification, updates of the following ME configuration parameters are supported:
• default configured NSSAI.
• disaster roaming information.
• disaster roaming information in EPS.

The 5GS in an SNPN supports updating UE parameters via NAS signalling. The feature enables the SNPN to securely and dynamically re-configure the UE configuration parameter stored on the USIM if the UE used the USIM for registration to the SNPN.

• In this release of the specification, updates of the following USIM configuration parameters are supported:
• routing indicator.
• In this release of specification, updates of the following ME configuration parameters are supported:
• routing indicator.
• default configured NSSAI.

The update of UE configuration parameters is initiated by the network using the network-initiated downlink NAS transport procedure as described in clause 5.4.5.3. The ME acknowledgement of successful reception of the updated UE configuration parameter information is sent back to the network using the UE-initiated uplink NAS transport procedure as described in clause 5.4.5.2.