Section: 6.1.1.4.1 Serving network name
Content: The serving network name is used in the derivation of the anchor key. It serves a dual purpose, namely: - It binds the anchor key to the serving network by including the serving network identifier (SN Id). - It makes sure that the anchor key is specific for authentication between a 5G core network and a UE by including a service code set to "5G". In 5G AKA, the serving network name has a similar purpose of binding the RES* and XRES* to the serving network. The serving network name is the concatenation of a service code and the SN Id with a separation character ":" such that the service code prepends the SN Id. NOTE: No parameter like 'access network type' is used for serving network name as it relates to a 5G core procedure that is access network agnostic. The SN Id identifies the serving PLMN and, except for standalone non-public networks, is defined as SNN-network-identifier in TS 24.501[ Non-Access-Stratum (NAS) protocol for 5G System (5GS); Stage 3 ] [35]. NOTE 1: For standalone non-public networks, the definition of SN Id is given in Annex I.3.