Rosum, based in Mountain View, CA, says television broadcast antenna towers have accurate-enough time stamps to publicly broadcast GPS-like results without a satellite. This, the company said, could be a boon for broadcasters helping wireless carriers deploy â€śfemtocells,â€ť which need a GPS signal to operate.
A femtocell is a small cellular base station, typically designed for use in residential or small business environments. It connects to the service providerâ€™s network via broadband (such as DSL or cable). It typically supports five to 100 mobile phones in a residential setting.
Over-the-air broadcasts could allow stations to place GPS in places where satellite signals canâ€™t be received. Thatâ€™s generally indoors, as well as urban canyons.
All femtocells sold to date include a GPS receiver â€” and a 30ft GPS antenna. If a femtocell canâ€™t get a GPS lock, it canâ€™t be used.
Rosum supplies a simple solution for location data that uses TV broadcasts.For more information, visit www.rosum.com.