US 11,856,510 B2
Reduced power roaming by an accessory device
Xiangpeng Jing, Palo Alto, CA (US); Sivaramachandran Ganesan, San Jose, CA (US); Karthik Anantharaman, Cupertino, CA (US); Lester K. Chan, Cupertino, CA (US); and Qi He, San Jose, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Jun. 17, 2021, as Appl. No. 17/304,291.
Claims priority of provisional application 63/040,907, filed on Jun. 18, 2020.
Prior Publication US 2021/0400575 A1, Dec. 23, 2021
Int. Cl. H04W 48/18 (2009.01); H04W 48/16 (2009.01); H04W 4/02 (2018.01); H04W 8/18 (2009.01); H04W 8/02 (2009.01); H04W 72/56 (2023.01); H04W 84/04 (2009.01)
CPC H04W 48/18 (2013.01) [H04W 4/025 (2013.01); H04W 8/02 (2013.01); H04W 8/183 (2013.01); H04W 48/16 (2013.01); H04W 72/56 (2023.01); H04W 84/042 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A processor of a user equipment (UE) configured to perform operations, comprising:
prioritizing a plurality of Public Land Mobile Networks (PLMNs) from an aggregate roaming priority public land mobile network (RPPLMN) list containing the plurality of PLMNs into a plurality of prioritized PLMNs, wherein the aggregate RPPLMN list is composed by the UE based on information retrieved from a plurality of sources;
selecting a PLMN from the plurality of prioritized PLMNs based at least on a priority of the selected PLMN, wherein the selecting further comprises:
determining whether an application processor (AP) assisted location service is available, wherein the AP-assisted service is configured to identify a plurality of deployed PLMNs and a plurality of frequencies used by the plurality of deployed PLMNs at a current geographical location of the UE;
when the AP assisted location service is available, determining whether a registered PLMN (RPLMN) is valid in a current mobile country code (MCC);
when the AP-assisted location service is not available, determining whether a timestamp of an RPLMN is within a predetermined period of time; and
connecting to the selected PLMN from the plurality of prioritized PLMNs.