Test Results Confirm Ability Of Existing Technologies To Provide Accurate Location Information To First Responders When Indoor Calls Originate From Wireless Phones

BERWYN, Pa., April 23, 2013 /PRNewswire/ -- TruePosition Inc., a provider of wireless location solutions and a subsidiary of Liberty Media Corporation, announces the release of results from indoor tests of its hybrid wireless location technology combining the Uplink Time Difference of Arrival (U-TDOA) and Assisted Global Positioning System (A-GPS) methods. Of the four technologies tested, U-TDOA was the only one to have a 100 percent yield in both urban and suburban performance testing, with every test call generating corresponding location information.

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The U.S. Federal Communications Commission (FCC) estimates that 70 percent of 911 calls are placed from wireless phones and it is further estimated that as many, if not more, than 50 percent of these wireless 911 calls originate indoors. To address concerns about the ability of existing technologies to locate wireless 911 calls made from indoor areas, the FCC is gathering data of the existing and emerging wireless location technologies.

"Tests conducted in San Francisco and in Wilmington, Del. and elsewhere clearly show that providing accurate location information to first responders when the call originates from a wireless phone indoors is an achievable goal," said Steve Stuut, TruePosition CEO. "The combination of U-TDOA and A-GPS location technologies is an excellent solution for locating indoor 911 calls, or other situations where yield and accuracy are critical."

"U-TDOA and A-GPS technologies are both widely deployed in the U.S. today, and when combined, provide a solution that is not only technically superior, but also commercially viable and imminently available," said Stuut. "U-TDOA, currently deployed on AT&T's and T-Mobile's networks, is already protecting the millions of AT&T and T-Mobile customers who dial 911 from their wireless phones, making it easier and faster for first responders to find them indoors; and can easily be paired with existing AGPS capabilities in a hybrid solution."

Testing and Results: The test methodology was designed by an FCC advisory committee, the Communication, Security, Reliability and Interoperability Council (CSRIC), Working Group 3 (WG3). The test methodology was created to ensure representative results for a statistically significant number of test calls made from multiple building types and environments. Performance characteristics tested include accuracy, latency, yield, reported uncertainty and location scatter.  The San Francisco and Wilmington tests were separately conducted by the same independent third party.

Results for two critical performance characteristics, location yield and location accuracy in urban and suburban environments are listed in Table 1.

Table 1: Selected Indoor Test Results

The first three technologies listed were tested in the San Francisco, Calif. area, while the TruePosition system was tested in Wilmington, Del. Both reports are available for download in the following locations:

• San Francisco Report: http://transition.fcc.gov/bureaus/pshs/advisory/csric3/CSRIC_III_WG3_Report_March_ 2013_ILTestBedReport.pdf
• Wilmington Report::
  http://apps.fcc.gov/ecfs/document/view;jsessionid=8pTcRsLZL0MRYWh57JbL6Q8ywnp7pQRknm7Qm7XnzmvtFhm6LWJT!-817071755!638063854?id=7022133923

ABOUT TRUEPOSITION, THE LOCATION SPECIALISTS™

TruePosition is the global leader in location determination and intelligence solutions that help protect citizens, combat crime and save lives. TruePosition creates custom mobile location solutions for mission-critical situations where lives and safety are at stake and accuracy and reliability are paramount.

TruePosition has more patents, technical expertise and operational experience in wireless location than any other company in the world. Every day more than 100 million people depend on location services supported by TruePosition technology. TruePosition is owned by Liberty Media Corporation.

TruePosition, Inc., the TruePosition logo and LOCINT are registered trademarks of TruePosition, Inc. Other marks, such as The Location Specialists, are claimed as trademarks by TruePosition.

CONTACT: Lyndsey Medsker
202-524-6505

SOURCE TruePosition Inc.