name: TNGF
full_form: Trusted Non-3GPP Gateway Function
context: The Deregistration procedure via trusted non-3GPP access shall be supported as specified in clause 4.12.3 for the untrusted non-3GPP access with the following modifications: - The untrusted non-3GPP access is substituted by a trusted non-3GPP access point (TNAP). - The N3IWF is substituted by the TNGF. - If the UE has reserved QoS resources over non-3GPP access by using the Additional QoS Information (specified in clause 4.12a.5), then the UE shall release these resources.
description: The Trusted Non-3GPP Gateway Function (TNGF) is a network function that plays a crucial role in managing trusted non-3GPP access to the 5G system. It substitutes the N3IWF in the context of trusted non-3GPP access and is involved in procedures such as deregistration, where it ensures the release of reserved QoS resources over non-3GPP access.
explanation: TNGF is classified as a Network Function because it acts as an intermediary between the UE and the 5GS for trusted non-3GPP accesses, facilitating communication and resource management in alignment with 3GPP specifications.
section_title: 4.12a.3 Deregistration procedure for Trusted non-3GPP access
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biotag_Description: O,B-Network Function,I-Network Function,I-Network Function,I-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Technology,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,B-Measurement,O,O,O,O