US 12,137,430 B2
Multi-access protocol data unit session management
Myungjune Youn, Seoul (KR); and Laeyoung Kim, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/310,870
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Mar. 10, 2020, PCT No. PCT/KR2020/003331
§ 371(c)(1), (2) Date Aug. 27, 2021,
PCT Pub. No. WO2020/184956, PCT Pub. Date Sep. 17, 2020.
Claims priority of application No. 10-2019-0028404 (KR), filed on Mar. 12, 2019; and application No. 10-2019-0038677 (KR), filed on Apr. 2, 2019.
Prior Publication US 2022/0132454 A1, Apr. 28, 2022
Int. Cl. H04W 60/00 (2009.01); H04W 76/10 (2018.01); H04W 76/34 (2018.01)
CPC H04W 60/00 (2013.01) [H04W 76/10 (2018.02); H04W 76/34 (2018.02)] 5 Claims
OG exemplary drawing
 
1. A method for managing Multi-Access (MA) Packet Data Unit (PDU) session, the method performed by Session Management Function (SMF) node and comprising:
determining to release the MA PDU session for both of 3rd Generation Partnership Project (3GPP) access and non-3GPP access; and
transmitting a first message related to PDU session release to Access and Mobility Management Function (AMF) node, via a first access being released firstly between the 3GPP access and the non-3GPP access, based on that the MA PDU session is determined to be released for both of the 3GPP access and the non-3GPP access,
wherein the first message is Namf_Communication_N1N2MessageTransfer message or Nsmf_PDUSession_UpdateSMContext message, and
wherein the first message includes a PDU session release command message, which is to be transferred to a User Equipment (UE); and
transmitting a second message related to the PDU session release for releasing user plane resources of a second access being released secondly after the first access, after the first message is transmitted,
wherein the second message is Namf_Communication_N1N2MessageTransfer message, and
wherein the second message does not include a PDU session release command message, based on that the MA PDU session is to be released over both of the 3GPP access and non-3GPP access.