name: NAI
full_form: Network Access Identifier
context: procedure or, in the case of first authentication, the IMSI. 4. The message is routed towards the proper 3GPP AAA Server based on the realm part of the NAI as specified in TS 33.402 [4]. The routing path may include one or several AAA proxies. In such cases, NAI is formed in decorated NAI format as specified in TS 23.003 [3]. 5. When the 3GPP AAA Server receives the EAP Response/Identity message that contains the subscriber identity that is SUCI in NAI format, the 3GPP AAA decides to fetch SUPI(containing IMSI or taking the form of NAI) and authentication vectors from the UDM/ARPF via SWx'. In case the NAI received from step 4 does not contain a SUCI (i.e., the 5G user accesses the WLAN access network with a LTE ME or 5G user using pre-Rel-17 5G ME which does not support 5G NSWO of Rel-17 and provides an IMSI), the 3GPP AAA server gets IMSI from NAI and request authentication vectors using the existing SWx diameter MAR command. Similarly, in case the NAI received from step 4 contains
description: The Network Access Identifier (NAI) is a parameter used to identify a user or device accessing a network. It can be in various formats, including decorated NAI, and may contain a SUCI (SUPI Containing IMSI) or an IMSI. The NAI plays a crucial role in routing messages towards the proper 3GPP AAA Server and in authentication procedures.
explanation: The text describes the NAI as a parameter used for identification within a network context, outlining its function in routing and authentication.
section_title: 6.2.2.2	Flows
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biotag_Description: O,B-Parameter,I-Parameter,I-Parameter,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Parameter,O,O,O,O,O,O,O,B-Parameter,O,O,O,O,O,O,O,O,O,O,B-Organization,B-Service,O,O,O,O,O