Patent ID: 8265620

Claim:
A method of a base station for checking whether a frequency is illegally used in a wireless communication system, the method comprising: receiving, from a system manager, a silence interval setting signal comprising silence interval setting information; setting a silence interval in which a resource is not allocated to a terminal, using the silence interval setting information received from a system manager, and wherein the setting of the silence interval comprises: determining the silence interval in which the resource is not allocated to terminals, using a GPS time and the silence interval setting information provided from the system manager and determining an uplink interference power report period and the number of the report repetitions using the GPS time and the silence interval setting information; when the silence interval starts, measuring Received Signal Strength Indication (RSSI); and transmitting the RSSI to the system manager to examine at least one of a frequency illegal use and a reception path error using the RSSI, wherein the RSSI measured in the silence interval is recognized as an uplink interference power.