name: PLMN
full_form: Public land mobile network
context: A UE is authenticated at a serving PLMN and not at a home PLMN. This is similar to what is done in the current LTE system where the home PLMN sends authentication vector to the serving PLMN so that the serving PLMN can itself authenticate the UE. However, since the UE identifier that is used in the authentication procedure is a pseudonym or an encrypted long-term identifier, the serving PLMN does not yet know the long-term identifier. When the home PLMN gets informed by the serving PLMN that the UE is successfully authenticated and is registered in the serving PLMN (e.g. via an Update-Location-Request message in the current LTE system sent by a MME to a HSS), the home PLMN sends the long-term identifier to the serving PLMN in a separate message or piggy-backed to an existing message (e.g. in an Update-Location-Answer message in the current LTE system sent by a HSS to a MME). Now, the serving PLMN knows the long-term identifier of the UE and can perform lawful interception without the
description: A Public Land Mobile Network (PLMN) is a network that provides mobile telecommunications services to subscribers. It encompasses various network functions, including authentication, session management, and connection establishment.
explanation: The context describes the PLMN as an entity involved in authenticating users and managing their connections, which aligns with the definition of a Network in telecommunications.
section_title: 5.7.4.7.2.2	Solution 7.7-B: Serving PLMN authenticates UE
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biotag_Description: O,B-Network,I-Network,I-Network,I-Network,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O