Assisted base stations synchronization
First Claim
1. A method of time synchronizing base stations in a wireless communication network comprising the steps of:
- receiving at least one satellite signal;
estimating satellite signal estimates for a base station using the received satellite signal and a known location for the base station; and
transmitting assisting information having the satellite signal estimates to the base station.
1 Assignment
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Accused Products
Abstract
A method and apparatus for providing a base station with a timing reference that is precise and cost effective using assisting information to facilitate detection of, and extraction of system timing information from, satellite signals by the base station, thereby decreasing the intervals during which system timing information is unavailable and eliminating the need for a highly stabilized oscillator at the base station. Assisting information is any information which may be used by the base station to facilitate detection of satellite signals. Assisting information may include identities of satellites and satellite signal estimates, such as predicted navigation data, a Doppler frequency estimate, a code phase estimate, Doppler frequency and code phase search windows, etc. The satellite signal estimates are based on the known or current location of the base station.
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Citations
20 Claims
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1. A method of time synchronizing base stations in a wireless communication network comprising the steps of:
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receiving at least one satellite signal;
estimating satellite signal estimates for a base station using the received satellite signal and a known location for the base station; and
transmitting assisting information having the satellite signal estimates to the base station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of time synchronizing base stations in a wireless communication network comprising the steps of:
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receiving assisting information at one or more base stations, the assisting information having satellite signal estimates based on received satellite signals and known locations for the one or more base stations; and
extracting system timing information from at least one satellite signal detected using the assisting information at the one or more base stations. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A base station comprising:
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an antenna mounted at a stationary location for receiving assisting information;
a satellite receiver for detecting satellite signals using the assisting information and for extracting system timing information from detected satellite signals;
a timing device for generating a timing signal using extracted system timing information; and
a transmitter for transmitting signals using the timing signal. - View Dependent Claims (20)
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Specification