Patent ID: 11895539
Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A session management function (SMF) device in a network, the SMF device configured to:
determine, by the SMF device, PDU (Protocol Data Unit) session anchor relocation;
transmit session establishment request to a new PSA (PDU Session Anchor) device and providing a tunnel ID of UL(Uplink) CL(Classifier);
transmit a session modification request to the UL CL to update an UL traffic filter according to an UL CL rules regarding a traffic flow;
receive a session modification response, when the UL CL successfully updates all the UL traffic filters that the SMF device requests to modify; and
transmit 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.