US 12,452,818 B2
Handling PLMN prioritization
Roland Gruber, Sauerlach (DE); Deepak Dash, Bangalore (IN); and Nitin Kuppelur, Bangalore (IN)
Assigned to Apple Inc., Cupertino, CA (US)
Appl. No. 18/251,766
Filed by Apple Inc., Cupertino, CA (US)
PCT Filed Nov. 4, 2021, PCT No. PCT/US2021/072230
§ 371(c)(1), (2) Date May 4, 2023,
PCT Pub. No. WO2022/099281, PCT Pub. Date May 12, 2022.
Claims priority of application No. 202041048157 (IN), filed on Nov. 4, 2020.
Prior Publication US 2023/0422197 A1, Dec. 28, 2023
Int. Cl. H04W 60/00 (2009.01); H04W 48/16 (2009.01); H04W 48/18 (2009.01); H04W 60/04 (2009.01); H04W 84/04 (2009.01)
CPC H04W 60/00 (2013.01) [H04W 48/16 (2013.01); H04W 48/18 (2013.01); H04W 60/04 (2013.01); H04W 84/042 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A user equipment (UE), comprising:
a transceiver configured to connect to a plurality of networks; and
a processor communicatively coupled to the transceiver and configured to perform operations comprising:
transmitting a registration request message to a first public land mobile network (PLMN), wherein the first PLMN is a roaming PLMN;
receiving a registration accept message from the first PLMN;
determining that the registration accept message includes a manipulated steering of roaming (SoR) container or does not include a SoR container, wherein the SoR container is configured by a home PLMN (HPLMN) of the UE and transmitted to the first PLMN from the HPLMN;
determining that the registration accept message includes an indication that the first PLMN does not support voice over packet switching (VoPS); and
adding the first PLMN to a first list of PLMNs in which voice service is not possible in an N1 mode.