Section: 28.7.9 Decorated NAI format for SUCI 28.7.9.1 General
Content: The Decorated NAI format for SUCI shall take the form of a NAI and shall have the form 'Homerealm!username@otherrealm' as specified in clause 2.7 of the IETF RFC 4282 [53]. The username part of Decorated NAI shall contain the username of the NAI format for SUCI as specified in clause 28.7.3. 'Homerealm' shall be the realm of the NAI format for SUCI as specified in clause 28.7.3, unless specified otherwise in relevant clauses. The realm part of Decorated NAI consists of 'otherrealm', see the IETF RFC 4282 [53]. Otherrealm' is the realm built using the PLMN ID (visited MCC + visited MNC) of the visited PLMN selected by the UE. In case of the SNPN senarios, the "Otherrealm" is the realm build using the SNPN ID (PLMN ID + NID, where PLMN ID + NID are MCC + MNC + NID of the non-subscribed SNPN). The 'Homerealm' and the 'otherealm' may be preceded by one or more labels for specific use cases of the Decorated NAI format for SUCI, e.g. for 5G NSWO (see clause 28.7.9.2). The result is a decorated NAI should take the form as mentioned below: <one or more labels>.mnc<homeMNC>.mcc<homeMCC>.3gppnetwork.org!<username of SUCI in NAI format>@<one or more labels>.mnc<visitedMNC>.mcc<visitedMCC>.3gppnetwork.org For the SNPN scenarios where the credential holder is a subscribed SNPN, the decorated NAI should have the form as mentioned below: <one or more labels>.nid<subscribedSNPNNID>.mnc<subscribedSNPNMNC>.mcc<subscribedSNPNMCC>.3gppnetwork.org!<username of SUCI in NAI format>@<one or more labels>.nid<nonsubscribedSNPNNID>.mnc<nonsubscribedSNPNMNC>.mcc<nonsubscribedSNPNMCC>.3gppnetwork.org For the SNPN scenarios where the credential holder is an HPLMN, the decorated NAI should have the form as mentioned below: <one or more labels>.mnc< homeMNC>.mcc< homeMNC>.3gppnetwork.org!<username of SUCI in NAI format>@<one or more labels>.nid<nonsubscribedSNPNNID>.mnc<nonsubscribedSNPNMNC>.mcc<nonsubscribedSNPNMCC>.3gppnetwork.org NOTE: In 3GPP TS 23.122[ Non-Access-Stratum (NAS) functions related to Mobile Station (MS) in idle mode ]  [139], the term "subscribed SNPN" refers to the SNPN for which UE has a subscription.The term "subscribedSNPNMCC" hence, refers to the MCC of the SNPN to which the UE is subscribed. The term "subscribedSNPNMNC" also refers to the MNC of the SNPN to which the UE is subscribed.