US 11,877,221 B1
Uncertainty based altitude filtering for location reporting in E911 systems
Wei-Ming Lan, Morrisville, NC (US); and Nan Xiao, Mercer Island, WA (US)
Assigned to T-Mobile Innovations LLC, Overland Park, KS (US)
Filed by T-Mobile Innovations LLC, Overland Park, KS (US)
Filed on Sep. 30, 2021, as Appl. No. 17/491,047.
Int. Cl. H04W 4/90 (2018.01); H04W 4/029 (2018.01); H04W 64/00 (2009.01); H04M 3/51 (2006.01); H04W 76/50 (2018.01)
CPC H04W 4/90 (2018.02) [H04W 4/029 (2018.02); H04W 64/003 (2013.01); H04M 3/5116 (2013.01); H04W 76/50 (2018.02)] 20 Claims
OG exemplary drawing
 
1. An Enhanced 911 (E911) method, the method comprising:
receiving a location in response to an E911 communication initiated by a UE, wherein the location includes an altitude value associated with the UE;
comparing the altitude value to a threshold altitude value;
determining that the altitude value is above the threshold altitude value; and
based on determining that the altitude value is above the threshold altitude value, generating an E911 location report that excludes the altitude value.