Patent ID: 9020441
Filing Date: 2015-04-28
Classification: B60R,H04B,H04W

Abstract:
1. A signal transfer time measurement apparatus that measures a transfer time of a signal transmitted from a base station and returned via a terminal to the base station, the signal transfer time measurement apparatus comprising: a controller that is configured to determine whether a communication performed between the base station and the terminal is authorized or unauthorized, the controller including a signal processor and a transfer time calculation unit, wherein the signal processor is configured to divide the signal into a plurality of frequency bands and transmit a plurality of narrowband signals in the plurality of frequency bands, wherein the transfer time calculation unit is configured to calculate the transfer time by using one of the plurality of narrowband signals, and wherein the controller is configured to determine that the communication performed between the base station and the terminal is unauthorized when the transfer time calculated by the transfer time calculation unit is greater than or equal to a threshold.