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MAINTAINING LOCAL OFFLOADING OF TRAFFIC IN A HANDOVER FROM A FIFTH GENERATION SYSTEM (5GS) TO AN EVOLVED PACKET SYSTEM (EPS)
MAINTAINING LOCAL OFFLOADING OF TRAFFIC IN A HANDOVER FROM A FIFTH GENERATION SYSTEM (5GS) TO AN EVOLVED PACKET SYSTEM (EPS)
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机译:将流量从第五代系统(5GS)移交到进化的分组系统(EPS)中维护局部卸载
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摘要
A network node includes control plane functionality for managing a session of a user equipment (UE) which is anchored at a User Plane Function (UPF) anchor for communicating traffic between the UE and a data network. The node operates to obtain, from an Access and Mobility Management Function (AMF), a session context request responsive to a handover indication indicating a handover of the session from a Fifth Generation System (5GS) to an Evolved Packet System (EPS). The node identifies whether an uplink classifier (UL-CL) UPF is in use for local offloading to a local UPF anchor for delivery to a local area data network. Based on the identifying, the node obtains uplink tunnel information of the UL-CL UPF instead of the UPF anchor for establishing at least one bearer for the session and sends to the AMF a session context response including the uplink tunnel information of the UL-CL UPF.
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