Session management method based on reallocation of PDU session anchor device, and device performing the session management method
AssigneeElectronics and Telecommunications Research Institute
InventorsSoohwan Lee, Dongmyoung Kim, Myung Ki Shin
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Abstract
Disclosed is a session management method based on protocol data unit (PDU) session anchor (PSA) relocation, and an device performing the session management method. The session management method may include determining to perform PSA relocation, establishing a new PSA device through the PSA relocation, and releasing an existing PSA device, in which the PSA relocation may allow traffic moving towards the existing PSA device to move to the new PSA device.
Claims20
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.
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.
Dependencies are inferred from the claim text.