CPC H04W 36/0022 (2013.01) [H04L 67/14 (2013.01); H04W 36/0011 (2013.01); H04W 36/12 (2013.01); H04L 61/5007 (2022.05); H04L 2101/677 (2022.05); H04W 8/28 (2013.01); H04W 80/04 (2013.01)] | 20 Claims |
1. A method to be performed by a session management function (SMF) device in a network, the method comprising:
determining, by the SMF device, PDU (Protocol Data Unit) session anchor relocation;
transmitting session establishment request to a new PSA device and providing a tunnel ID of UL(Uplink) CL(Classifier);
transmitting a session modification request to the UL CL to update an UL traffic filter according to an UL CL rules regarding a traffic flow;
receiving a session modification response, when the UL CL successfully updates all the UL traffic filters that the SMF device requests to modify; and
transmitting a session release request with a session ID to an existing PSA(PDU Session Anchor) device,
wherein the traffic flow is related to movement from the existing PSA device to the new PSA device.
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