The present invention relates to a method of a base station transmitting a coverage compensation request signal to determine switching to an idle state. The method comprising: transmitting, by the first base station, an idle switching request message for requesting switching to the idle state to a second base station in a compensation group to which the first base station belongs; transmitting a Coverage Compensation Request Message to a compensation base station pre-linked to the first base station in the compensation group; receiving a Coverage Compensation Response Message and an idle state switching response message from the compensation base station and the second base station, respectively; determining whether the first base station and the second base station in the compensation group are to switch to the idle state based on the received Coverage Compensation Request Message and the idle state switching response message.