US 10,893,463 B2
Incremental querying for network coverage
Hsin-Fu Henry Chiang, Bellevue, WA (US); Ming Shan Kwok, Seattle, WA (US); and Jun Liu, Issaquah, WA (US)
Assigned to T-Mobile USA, Inc., Bellevue, WA (US)
Filed by T-Mobile USA, Inc., Bellevue, WA (US)
Filed on Feb. 19, 2019, as Appl. No. 16/279,553.
Prior Publication US 2020/0267628 A1, Aug. 20, 2020
Int. Cl. H04L 12/28 (2006.01); H04W 48/14 (2009.01); H04W 8/20 (2009.01); H04W 8/12 (2009.01); H04W 84/04 (2009.01)
CPC H04W 48/14 (2013.01) [H04W 8/12 (2013.01); H04W 8/20 (2013.01); H04W 84/042 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method comprising:
entering a roaming mode for a user device, whereby the user device attaches to a visited public land mobile network (VPLMN);
initiating a query application to determine if a more preferred VPLMN or a home public land mobile network (HPLMN) to which the user device is subscribed is available;
determining that a more preferred VPLMN or a home public land mobile network (HPLMN) to which the user device is subscribed is not available;
incrementing a query timer value used to determine a time between operations of the query application;
determining that the user device has moved less than a predetermined distance within a predetermined period of time; and
in response to determining that the user device has moved less than the predetermined distance, increasing the query timer value.