TruePosition(R) Unveils Breakthrough Hybrid Location Solution(TM) to Improve Accuracy and Reliability for E-911 and all Location-Based Services

BERWYN, Pa.—(BUSINESS WIRE)—March 31, 2008— TruePosition, Inc., a leading provider of wireless location technologies and solutions and a subsidiary of Liberty Media Corporation, today announced the TruePosition(R) Hybrid Location Solution(TM). This mobile positioning method combines network-based and handset-based location technologies and leverages the benefits of each to gain higher accuracy and reliability than any other single location technology.

By combining multiple location technologies, TruePosition offers significantly improved performance for all location-based services. The Hybrid Location Solution provides better accuracy and consistency for consumer services such as local search and location-based advertising. The solution also enhances enterprise services including workforce management and asset tracking. Most importantly, it offers the accuracy, latency, and yield required for safety and security services such as family monitoring, personal medical alerts, and emergency number services including E-911 (in the US) or E-112 (in the European Union).

The TruePosition Hybrid Location Solution can incorporate a combination of location technologies such as Cell ID (CID), Enhanced Cell ID (ECID), Angle of Arrival (AOA), Uplink Time Difference of Arrival (U-TDOA), and Assisted GPS (A-GPS) to ensure optimum accuracy, latency, and yield across every type of environment and condition--urban, suburban, rural, indoors, in-vehicle, in-motion and stationary.

"TruePosition's combination of U-TDOA and A-GPS provides the best performance of any individual technology or any hybrid location technology available today or in the foreseeable future," said Stephen Stuut, CEO of TruePosition. "With this solution, TruePosition can offer the performance and reliability that the public demands for location-based services, especially for emergency calls where people's lives and property are often at stake."

The TruePosition Hybrid Location Solution can perform in two different ways:

1. A-GPS and U-TDOA can be combined in a fallback arrangement, in which the location system calls on one method when the performance of the other has deteriorated due to environmental conditions. For example, U-TDOA would be the operative method in urban areas and indoors, where A-GPS produces lesser results or fails altogether. Consequently, A-GPS would be selected in extreme rural areas where it can produce very accurate results.

2. TruePosition can have two location technologies such as A-GPS and U-TDOA operate simultaneously, and then mathematically combine the calculations to obtain enhanced results. The combined location calculations produce location estimates at substantially higher accuracy than A-GPS or U-TDOA alone.

The TruePosition Hybrid Location Solution(TM) not only improves the performance of A-GPS equipped mobiles in areas with marginal A-GPS coverage, but supplies high-accuracy location in areas with no GPS reception and to mobile phones without GPS capabilities.

About TruePosition

TruePosition ( is one of the world's leading providers of complete, wireless location solutions for the personal and public safety and government security markets. The company's high-performance, turnkey and managed solutions include positioning technologies, applications, integration services, and technical support. These solutions meet demanding location requirements, including U.S. E911 and other emergency calling directives worldwide. TruePosition has two subsidiaries: Useful Networks, a location aggregator, and Zoombak, a consumer applications developer. Founded in 1993 and headquartered in the Philadelphia, PA (USA) area, TruePosition is owned by Liberty Media Corporation.


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