Patent ID: 9197989
Filing Date: 2015-11-24
Classification: G01S,H04W

Abstract:
1. A method for measuring a location of a mobile terminal, comprising: transmitting a reference signal of a first signal source in response to reception of a reference signal of the other signal source, including a step (a) of transmitting a reference signal at the second signal source in response to reception of the reference signal from the first signal source and a step (b) of transmitting a reference signal at the first signal source in response to reception of the reference signal from the second signal source, and performing the steps (a) and (b) repeatedly; receiving at a mobile terminal first and second reference signals from first and second signal sources for transmitting the first and second reference signals; calculating at the mobile terminal a Time Difference of Arrival (TDOA) between the first and second reference signals in consideration of the first and second reference signals received from the mobile terminal and a signal shift time between the first and second signal sources; and calculating at the mobile terminal the location of the mobile terminal using the TDOA and locations of the first and second signal sources; wherein a signal shift time (T