US 9,813,856 B1
Proximity location system and method thereof for locating a communications device
Lawrence W. Ciesla, Yorkville, IL (US); Ken Davis, Longmont, CO (US); and Monica Ann Marics, Boulder, CO (US)
Assigned to West Corporation, Omaha, NE (US)
Filed by West Corporation, Omaha, NE (US)
Filed on Nov. 29, 2016, as Appl. No. 15/363,136.
Application 15/363,136 is a continuation of application No. 13/593,595, filed on Aug. 24, 2012, granted, now 9,508,254.
Application 13/593,595 is a continuation of application No. 12/050,308, filed on Mar. 18, 2008, granted, now 8,269,607, issued on Sep. 18, 2012.
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 4/02 (2009.01); H04W 4/00 (2009.01); H04W 4/22 (2009.01); H04L 12/66 (2006.01)
CPC H04W 4/02 (2013.01) [H04L 12/66 (2013.01); H04W 4/008 (2013.01); H04W 4/22 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
detecting, by a communication device, a plurality of proximity location tags, each of the plurality of proximity location tags comprising a proximity location key identifying a location of one of the plurality of proximity location tags;
detecting a closest proximity location tag of the plurality of proximity location tags;
receiving, by the communication device, the proximity location key from the closest proximity location tag;
embedding, by the communication device, the proximity location key of the closest proximity location tag in a message and forwarding the message to a Voice over Internet Protocol Position Center (VPC);
querying, by the VPC, a location information server for location information associated with the proximity location key of the closest proximity location tag;
providing, by the VPC, the location information to a receiver; and
as the communications device changes location, when the communications device senses that it is no longer in sufficient proximity to any proximity location tags, determining, by the communications device, that the location of the communications device is unknown until the communications device detects one or more proximity location tags.