TCS granted U.S. patent for A-GPS



TCS granted U.S. patent for A-GPS
TeleCommunication Systems, a provider of wireless text messaging and E9-1-1 services, announced the U.S. Patent and Trademark Office has issued the company patent number 7,489,273 for "Culled Satellite Ephemeris Information for Quick, Accurate Assisted Locating Satellite Location Determination for Cell Site Antennas."

The patent describes a method and apparatus for culling satellites into two smaller sub-groups identified as being a higher priority and a lower priority for determining the location of a mobile device. The two groups are selected by the dwell time the satellites remain in a defined geometric shape above a reference point physically distant from the mobile device. The reference point can be a wireless base station. The selecting of the satellites can be done by the mobile device or by the wireless base station that the mobile device is in communication.

“This TCS invention allows a mobile subscriber's location to be determined more quickly and accurately than conventional GPS or assisted GPS (A-GPS) methods”, said a TCS press release. “By selecting two smaller groups of satellites, the mobile device using the patented technology needs much less time to compute the device's latitude and longitude”.

This latest A-GPS patent represents the ninth in TCS' A-GPS patent portfolio. TCS now holds 69 patents with 212 applications pending.

Wednesday, February 11th 2009


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