Transmission time difference measurement method and system

摘要

The propagation time ( 1605 ) of signals between a terminal ( 1304 ) and a base station ( 1302 ) is calculated from the round-trip time ( 1601 ) of signals between the terminal ( 1304 ) and the base station ( 1302 ) and the turn-around time ( 1603 ) from the reception by terminal ( 1304 ) of a signal from base station ( 1302 ) until the transmission of the signal to the base station ( 1302 ). The propagation time ( 1606 ) of signals between the terminal ( 1304 ) and another base station ( 1303 ) is similarly calculated. The difference between the propagation times ( 1605 and 1606 ) and the arrival time difference ( 1607 ) that is calculated in the terminal ( 1304 ) are then compared to calculate the transmission time difference ( 1608 ) between the base stations ( 1302 and 1303 ).