name: UPGW
full_form: User Plane Gateway
context: the traffic for that session. The UPGW identifies from the TNL ID in the tunnel header the UE and associated PDU session. Reception of this first packet automatically switches the DL path between the gNB2 and the UPGW for this (UE, PDU session). - At step 3, The UPGW sends an End Marker packet to gNB1. Receiving the End Marker packet in gNB1 including TNL ID in the tunnel header automatically releases the tunnel between the gNB1 and the UPGW for this (UE, PDU session). - At step 4 the gNB may send a gNB Change Request message to inform NG CP of the new gNB ID. This above described procedure is applicable to both eLTE eNB and gNB.
description: The User Plane Gateway (UPGW) manages user plane traffic. It identifies users (UE) and their associated PDU sessions based on TNL ID in tunnel headers. The UPGW switches downlink (DL) paths between gNBs and sends End Marker packets to release tunnels.
explanation: The description details the UPGW's responsibilities in handling user traffic, session management, and inter-gNB communication, aligning with the characteristics of a Network Function.
section_title: 10.2.1.2.2Inter-gNB Handover Variant with in-band Path Switch
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biotag_Description: O,B-Network Function,I-Network Function,I-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,B-Connection,O,O,O,B-Network,B-Parameter,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,O,O