US Patent No. 10,893,574

PACKET DATA UNIT SESSION RELEASE METHOD AND NETWORK ENTITY PERFORMING THE SAME


Patent No. 10,893,574
Issue Date January 12, 2021
Title Packet Data Unit Session Release Method And Network Entity Performing The Same
Inventorship Changki Kim, Daejeon (KR)
Jeoung Lak Ha, Daejeon (KR)
Yoo Hwa Kang, Daejeon (KR)
Assignee Electronics and Telecommunications Research Institute, Daejeon (KR)

Claim of US Patent No. 10,893,574

1. A method for releasing a packet data unit (PDU) session performed by a session management function (SMF) in a network, the method comprising:deciding a single access network, which is an access network to be released in a multi-access packet data unit (MA PDU) session which is already established;
transmitting a first message including first information corresponding to an access type of the decided single access network to a user plane function (UPF);
receiving a response message corresponding to the first message from the UPF; and
transmitting a second message including second information and a PDU session release command message to an access and mobility management function (AMF), wherein the second information indicates the access type of the decided single access network.