name: FA
full_form: Foreign Agent
context: FA and the PDN GW according to TS 33.210 [6]. 4) The selected PDN GW obtains Authentication and Authorization information from the AAA/HSS. 5) The PDN GW validates the MN-HA authentication extension. After successful authentication extension validation, the PDN GW sends a Registration Reply (RRP) to the UE through the FA. The RRP message shall be protected between the PDN GW and the FA according to TS 33.210 [6]. 6) The FA processes the RRP according to RFC 3344 [17]. The FA then forwards the RRP message to the UE. The FA includes the MN-FA authentication extension, if the FA received MN-FA authentication extension in the RRQ message. 7) The UE validates the MN-HA authentication extension and MN-FA authentication extension, if present.
description: The Foreign Agent (FA) is a network function that assists in the registration process of a mobile node (MN) with the home agent (HA) and the PDN GW. It acts as an intermediary, forwarding messages between the MN and the PDN GW, and is involved in authentication and authorization procedures.
explanation: The context describes the FA's role in the registration process, its interaction with other network functions like the PDN GW, and its involvement in authentication and authorization procedures. This justifies classifying the FA as a Network Function.
section_title: 9.2.1.2.1	Procedures
biotag_Context: B-Service,O,O,B-Network Function,I-Network Function,O,O,B-Specification,O,O,O,O,O,B-Network Function,I-Network Function,O,B-Network Function,I-Network Function,I-Network Function,O,O,O,O,O,O,B-Network Function,I-Network Function,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,I-Network Function,O,O,O,O,O,O,O,B-Device,O,O,O,O,B-Message,O,O,O,O,O,O,B-Network Function,I-Network Function,O,O,B-Service,O,O,B-Specification,O,O,O,O,B-Service,O,O,B-Message,O,O,B-Specification,O,O,O,B-Service,O,O,O,B-Message,O,O,O,O,O,B-Service,O,O,O,O,O,O,O,B-Service,O,O,O,O,O,O,B-Message,O,O,O,B-Device,O,O,O,O,O,O,O,O,O,O,O
biotag_Description: O,B-Network Function,I-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,B-Network,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,B-Network,O,O,O,O,O,O,O,O,O