name: I-UPF
full_form: Interworking - User Plane Function
context: For 5GS to EPS Idle mode mobility using N26 with I-SMF removal, the procedure "5GS to EPS Idle mode mobility using N26 interface" defined in clause 4.11.1.3.2 for the home routed-roaming case are re-used, with the following change: - The V-SMF is replaced by I-SMF, H-SMF is replaced by SMF and V-UPF is replaced by I-UPF. - The V-CN Tunnel Info is replaced by Tunnel Info at I-UPF, H-CN Tunnel Info is replaced by Tunnel Info at UPF (PSA).
description: The Interworking - User Plane Function (I-UPF) is a network function that plays a crucial role in the interworking between different architectures, specifically in the context of 5G to EPS Idle mode mobility. It replaces the V-UPF and works with other network functions like SMF and I-SMF to manage tunnel information and ensure seamless mobility.
explanation: I-UPF is classified as a Network Function because it participates in the interworking between different network architectures, facilitating communication and data transfer between them. Its role in replacing V-UPF and interacting with other network functions like SMF and I-SMF for tunnel information management aligns with the 3GPP's specifications for efficient interworking operations.
section_title: 4.23.12.2 5GS to EPS Idle mode mobility using N26 interface with I-SMF removal
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biotag_Description: O,B-Network Function,I-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,O,O,O,O,B-Technology,O,B-Network,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,O