US 9,810,765 B2
Femtocell calibration for timing based locating systems
Jeremy Fix, Acworth, GA (US); Brandon Bowers Hilliard, Canton, GA (US); and Sheldon Meredith, Marietta, GA (US)
Assigned to AT&T MOBILITY II LLC, Atlanta, GA (US)
Filed by AT&T Mobility II LLC, Atlanta, GA (US)
Filed on Jan. 21, 2015, as Appl. No. 14/601,800.
Application 14/601,800 is a continuation of application No. 13/305,267, filed on Nov. 28, 2011, granted, now 8,970,432.
Prior Publication US 2015/0133156 A1, May 14, 2015
This patent is subject to a terminal disclaimer.
Int. Cl. G01S 1/08 (2006.01); G01S 3/02 (2006.01); G01S 5/04 (2006.01); G01S 5/06 (2006.01); G01S 5/02 (2010.01); G01S 5/10 (2006.01)
CPC G01S 5/06 (2013.01) [G01S 5/021 (2013.01); G01S 5/10 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system, comprising:
a processor; and
a memory that stores executable instructions that, when executed by the processor, facilitate performance of operations, comprising:
determining a timing calibration parameter for a macrocell device based on a variation between a first measured time difference between the macrocell device and a first mobile device and a first projected time difference between the macrocell device and a femtocell access point device within communication range of the first mobile device; and
determining a location of a second mobile device based on the timing calibration parameter and a second measured time difference between the macrocell device and the second mobile device.