US 12,081,974 B2
Method and system for optimizing AKMA key refresh mechanism in wireless network
Rajavelsamy Rajadurai, Bangalore (IN); Varini Gupta, Bangalore (IN); Nivedya Parambath Sasi, Bangalore (IN); and Rohini Rajendran, Bangalore (IN)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Dec. 23, 2021, as Appl. No. 17/561,078.
Claims priority of application No. 202041056989 (IN), filed on Dec. 29, 2020; and application No. 2020 41056989 (IN), filed on Nov. 22, 2021.
Prior Publication US 2022/0210640 A1, Jun. 30, 2022
Int. Cl. H04W 12/0433 (2021.01); H04W 12/06 (2021.01); H04W 12/37 (2021.01)
CPC H04W 12/06 (2013.01) [H04W 12/0433 (2021.01); H04W 12/37 (2021.01)] 6 Claims
OG exemplary drawing
 
1. A method performed by a user equipment (UE) in a wireless network, the method comprising:
generating a first primary authentication and key management for applications (AKMA) anchor key (KAKMA) and performing a first primary authentication with an AKMA anchor function (AAnF) server;
establishing communication with an application function (AF) server using a first AKMA application key (KAF) based on the first primary authentication;
receiving, from the AF server over the established communication, a message indicating that a lifetime of the first KAF has expired;
in response to receiving the message from the AF server over the established communication, configuring a back-off flag in the UE to optimize an AKMA key refresh mechanism in the wireless network, wherein the back-off flag prevents a request for a second KAKMA until a second primary authentication is performed; and
in case that the second primary authentication is performed, generating the second KAKMA.