US 12,382,526 B2
Handling of collision between PDU session establishment and modification procedure
Chien-Chun Huang-Fu, Hsin-Chu (TW); Chi-Hsien Chen, Hsin-Chu (TW); and Yuan-Chieh Lin, Hsin-Chu (TW)
Assigned to MEDIATEK Inc., Hsinchu (TW)
Filed by MEDIATEK INC., Hsin-Chu (TW)
Filed on Oct. 19, 2022, as Appl. No. 17/969,534.
Claims priority of provisional application 63/274,983, filed on Nov. 3, 2021.
Prior Publication US 2023/0133792 A1, May 4, 2023
Int. Cl. H04W 76/12 (2018.01); H04W 76/18 (2018.01); H04W 80/10 (2009.01)
CPC H04W 76/18 (2018.02) [H04W 76/12 (2018.02); H04W 80/10 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method, comprising:
transmitting a protocol data unit (PDU) session establishment request message with a first PDU session ID (PSI) by a user equipment (UE) in a 5G system (5GS) to initiate a UE-requested PDU session establishment procedure for a PDU session;
receiving a PDU session modification command message with a second PSI for a network-requested PDU session modification procedure, wherein the UE detects a collision between the establishment procedure and the modification procedure when the first PSI in the received PDU session modification command message is the same as the second PSI in the transmitted PDU session establishment request message;
determining that the UE-requested PDU session establishment procedure is to perform a handover for the PDU session between 3GPP access and non-3GPP access; and
proceeding with the UE-requested PDU session establishment procedure, wherein the UE aborts the network-requested PDU session modification procedure upon detecting the collision.