초록 ▼

A method and apparatus of determining the position of a mobile communications device using retransmitted GPS data is described. In the invention, a timing apparatus in the mobile communications device is synchronized with a timing device in the base station. The mobile unit samples and time stamps r

A method and apparatus of determining the position of a mobile communications device using retransmitted GPS data is described. In the invention, a timing apparatus in the mobile communications device is synchronized with a timing device in the base station. The mobile unit samples and time stamps received GPS signals for retransmission to the base station. The base station uses the time stamp to determine an approximate time when the GPS sample was received allowing a reduction in the amount of GPS sample data needed to compute a position of the mobile communications device.

대표청구항 ▼

1. A mobile communications device comprising:a timing apparatus to output a time stamp, the timing apparatus synchronized to a base station timing reference; an antenna to receive and output GPS data transmitted from at least one GPS satellite; a GPS receiving circuit coupled to the antenna and timi

1. A mobile communications device comprising:a timing apparatus to output a time stamp, the timing apparatus synchronized to a base station timing reference; an antenna to receive and output GPS data transmitted from at least one GPS satellite; a GPS receiving circuit coupled to the antenna and timing apparatus to sample the GPS data and combine a GPS data sample with e time stamp to form a data packet; and a transmission circuit to transmit a plurality of data packets for periodic determination of the position of the mobile communications device at a sampling rate for correlation with data at a base station, the data at said base station being retrieved from a memory of the base station which data was received at the base station at the same time.