name: AUSF
full_form: AUthentication Server Function
context: the UE is already registered into the network, the UDM also sends back the AUSF address, where the AUSF address indicate the serving AUSF for the UE. 4. AAuF forwards the SUPI and AAuF ID to the AUSF according to the AUSF address. If there is no AUSF address, the AAuF select an AUSF based on the local policy. 5. Upon receiving the AKMA security request from the AAuF, AUSF generates the AKMA key Kaauf with the following cases: Case A: If the identity of the subscriber is the SUPI, AUSF obtains the key Kausf based the SUPI, then generates the Kaauf based on the KAUSF and AAuF ID. Case B: If the identity of the subscriber is the SUPI, and there is no Kausf related with the SUPI, AUSF sends the SUPI to the UDM. UDM/ARPF shall choose the authentication method and generate the authentication vector, based on the subscription data of the SUPI. Then AUSF obtains the KAUSF, then generates the Kaauf based on the KAUSF and AAuF ID. 6. For Case A, the AUSF sends the Kaauf to the AAuF. For Case B,
description: The Authentication Server Function (AUSF) is a network function responsible for handling authentication-related tasks in the 5G core network. It interacts with other network functions, such as the Unified Data Management (UDM) and the Authentication Anchor Function (AAuF), to authenticate users and generate security keys.
explanation: The context describes AUSF's role in the authentication process, including its interactions with other network functions and its responsibility for generating security keys. This justifies classifying AUSF as a Network Function.
section_title: 5.24.2.2.1	Initiation
biotag_Context: O,B-Device,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,B-Network Function,O,O,O,B-Network Function,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,B-Parameter,O,O,B-Parameter,O,O,B-Network Function,O,O,O,B-Network Function,O,O,O,O,O,B-Network Function,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,B-Protocol,O,O,O,O,O,B-Network Function,O,O,B-Protocol,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,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,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,B-Parameter,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,O
biotag_Description: O,B-Network Function,I-Network Function,I-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,B-Technology,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,I-Network Function,I-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,O,O