US 12,413,953 B2
Improving disaster roaming service
Mahmoud Watfa, Staines (GB); and Lalith Kumar, Marathahalli (IN)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Nov. 3, 2022, as Appl. No. 17/980,197.
Claims priority of application No. 202131050575 (IN), filed on Nov. 3, 2021; and application No. 2216188 (GB), filed on Nov. 1, 2022.
Prior Publication US 2023/0136118 A1, May 4, 2023
Int. Cl. H04W 8/06 (2009.01); H04W 48/18 (2009.01); H04W 72/30 (2023.01); H04W 76/50 (2018.01)
CPC H04W 8/065 (2013.01) [H04W 48/18 (2013.01); H04W 72/30 (2023.01); H04W 76/50 (2018.02)] 12 Claims
OG exemplary drawing
 
1. A method performed by an access and mobility management function (AMF) in a public land mobile network (PLMN) providing disaster roaming service, the method comprising:
receiving, from a user equipment (UE), a first message requesting a registration for the disaster roaming service;
determining whether a disaster condition has ended in a previous PLMN associated with the UE which is registered for the disaster roaming service;
in case that the disaster condition has ended and the UE has an emergency protocol data unit (PDU) session, generating a second message indicating that the UE is registered for emergency service; and
transmitting, to the UE, the second message.