name: TNAP
full_form: Trusted Non-3GPP Access Point
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: A Trusted Non-3GPP Access Point (TNAP) is a network function that provides trusted access to the 5G system via non-3GPP networks. It plays a crucial role in managing user equipment connections and mobility, ensuring secure and efficient communication between the UE and the 5G core network.
explanation: The TNAP is classified as a Network Function because it serves as an entry point for trusted non-3GPP access to the 5G system, handling tasks such as QoS resource management and user equipment deregistration. This aligns with the 3GPP's specifications for network architecture and procedures in the context of trusted non-3GPP access.
section_title: 4.12a.3 Deregistration procedure for Trusted non-3GPP access
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