Subsidiary of Liberty Media Corporation and a leading name in the wireless location technologies, TruePosition Inc. announced last week the finding of a new research, carried out in collaboration with ABI Research.
The research put forward by the duo highlighted the brighter side of U-TDOA (Uplink Time Difference of Arrival), while revealing the limitations of A-GPS (Assisted GPS) when it comes to locating 911 emergency calls made on mobile phones.
TruePosition and ABI Research carried out the study using a number of off-the-shelf mobile phones to make over 3500 genuine 911 emergency calls in Austin and Frisco - 2 major cities in the state of Texas. The main motive behind the tests were to find out a reliable comparison of the accuracy as well as the reliability factors associated with both the A-GPS and U-TDOA technologies.
The study was conducted in a wide range of different conditions and environments including tall buildings in the cities, indoors, outdoor suburban environment, just to name a few.
“The testing data from Frisco and Austin shows that A-GPS did not perform well when the cell phone making the 9-1-1 call was indoors or when it was surrounded by tall buildings,” Dominique Bonte, Group Director of Telematics and Navigation for ABI Research said, Business Wire (opens in new tab) reports.
“A-GPS technology will not locate the cell phone with sufficient accuracy or, most likely, will not be able to locate the phone at all,” he added.