Reduced global positioning system receiver code shift search...

Details Reduced global positioning system receiver code shift search... Reduced global positioning system receiver code shift search...

G - Physics

01

S

G01S 5/14 (2006.01) G01S 1/00 (2006.01) G01S 1/04 (2006.01) G01S 5/00 (2006.01)

Patent

CA 2306380

A Global Positioning System (GPS) receiver located at a base station of a cellular telephone network determines the location of the base station and obtains GPS ephemeris and, if available, timing information. A server uses the obtained information to calculate auxiliary information for use by a GPS receiver. The base station transmits the auxiliary information to the GPS receiver which is located within a cellular telephone operating within the service area of the base station. The cellular telephone GPS receiver uses the auxiliary information to determine the location of the cellular telephone and transmits location information to the cellular telephone network via the cellular telephone and the base station.

L'invention porte sur récepteur GPS placé dans une station de base d'un réseau téléphonique cellulaire déterminant la position de la station de base, obtenant les éphémérides GPS, et, si elles sont disponibles, des informations de temps. Un serveur utilise les informations obtenues pour calculer des informations auxiliaires utilisables par le récepteur GPS. La station de base transmet les informations auxiliaires au récepteur GPS d'un téléphone cellulaire fonctionnant à l'intérieur de la zone de services de la station de base. Le récepteur GPS du téléphone cellulaire utilise les informations auxiliaires pour déterminer la position du téléphone cellulaire, puis transmet les informations de position au réseau téléphonique cellulaire viaa le téléphone cellulaire et la station de base.

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