Mobile GPS aiding data solution

Details Mobile GPS aiding data solution Mobile GPS aiding data solution

2006-11-07

2009-02-24

Phan, Dao L (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a satellite

C342S357490

Reexamination Certificate

active

07495609

ABSTRACT:
A mobile GPS-aiding system uses a GPS reference receiver to collect GPS navigation messages, a GPS-aiding data network server to distribute over the Internet all ephemeris and almanac data gleaned from the navigation messages, a number of commercial broadcast radio stations to publish such ephemeris and almanac data on particular sub-carriers, a number of vehicles equipped to receive the radio broadcasts and the sub-carriers and to retransmit them locally, e.g., via Bluetooth. Portable GPS receivers, operated near any of the vehicles, a receive Bluetooth transmissions with the ephemeris and almanac data with the identity of the radio broadcast station then being tuned. A breadcrumb database is used to index the locations of the radio broadcast stations. Each mobile GPS receiver contributes to such database after it computes a location fix. If the location of the radio broadcast station is already known to the database, then the location can be accessed and used before finding a position solution.

REFERENCES:
patent: 4445118 (1984-04-01), Taylor et al.
patent: 6208290 (2001-03-01), Krasner
patent: 6661784 (2003-12-01), Nykanen
patent: 2005/0197154 (2005-09-01), Leon et al.
patent: 2007/0110010 (2007-05-01), Kotola et al.

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