US 12,192,881 B2
In and relating to disaster inbound roamers in a telecommunication network
Erik Guttman, Staines (GB); and Kundan Tiwari, Bangalore (IN)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Appl. No. 17/629,630
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
PCT Filed Jul. 24, 2020, PCT No. PCT/KR2020/009820
§ 371(c)(1), (2) Date Jan. 24, 2022,
PCT Pub. No. WO2021/015597, PCT Pub. Date Jan. 28, 2021.
Claims priority of application No. 201931030058 (IN), filed on Jul. 25, 2019; and application No. 2011268 (GB), filed on Jul. 21, 2020.
Prior Publication US 2022/0248304 A1, Aug. 4, 2022
Int. Cl. H04W 48/06 (2009.01); H04W 4/90 (2018.01); H04W 8/06 (2009.01); H04W 48/10 (2009.01)
CPC H04W 48/06 (2013.01) [H04W 4/90 (2018.02); H04W 8/06 (2013.01); H04W 48/10 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method performed by a terminal in a wireless communication system, the method comprising:
identifying that the terminal loses coverage in a first public land mobile network (PLMN);
receiving, from a base station related to a second PLMN, a broadcast message indicating that the second PLMN is accessible for disaster inbound roamers;
based on the broadcast message, determining the second PLMN for a disaster roaming, wherein the second PLMN is one of PLMNs configured to be used in a disaster condition; and
initiating a registration procedure on the second PLMN,
wherein whether the second PLMN is allowed to access is determined based on a random number generated by the terminal and a unified access control (UAC) barring threshold value for an access for the disaster roaming received from the second base station.