US 12,170,929 B2
Method for managing network failures
Hyunsook Kim, Seoul (KR); Sungduck Chun, Seoul (KR); Laeyoung Kim, Seoul (KR); Sangmin Park, Seoul (KR); and Myungjune Youn, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/603,735
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Jan. 7, 2020, PCT No. PCT/KR2020/000277
§ 371(c)(1), (2) Date Mar. 28, 2022,
PCT Pub. No. WO2020/213816, PCT Pub. Date Oct. 22, 2020.
Claims priority of application No. 10-2019-0045044 (KR), filed on Apr. 17, 2019.
Prior Publication US 2023/0156553 A1, May 18, 2023
Int. Cl. H04W 36/24 (2009.01); H04W 36/14 (2009.01); H04W 60/00 (2009.01)
CPC H04W 36/24 (2013.01) [H04W 36/14 (2013.01); H04W 60/00 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A method performed by a User Equipment (UE) configured to operate in a wireless communication system, the method comprising:
subscribing to a first Public Land Mobile Network (PLMN) in which a service is interrupted due to a disaster;
receiving system information including information about the first PLMN from a base station in a second PLMN that provides a disaster roaming service;
transmitting a registration request message to an access mobility management entity in the second PLMN via the base station in the second PLMN;
receiving a registration accept message in response to the registration request message from the network node-access mobility management entity in the second PLMN via the base station in the second PLMN,
wherein the registration accept message includes information about the disaster roaming service; and
based on the information about the disaster roaming service:
i) transmitting a session establishment request message to a session management entity in the second PLMN via the access mobility management entity in the second PLMN and the base station in the second PLMN; and
ii) receiving a session establishment accept message in response to the session establishment request message from the session management entity in the second PLMN via the access mobility management entity in the second PLMN and the base station in the second PLMN.