the femto base station proceeds to step 710 and maintains the deactivation state of the transmission mode on the other hand in case that the intensity of the signal is greater than the reference value the femto base station proceeds to step 709 and activates the transmission mode that is the femto base station converts a transmit power into an on state at this time the femto base station converts into the on state by increasing a level of the transmit power step by step when the transmission mode is activated the femto base station proceeds to step 711 and performs a handover procedure for the terminal whose received signal intensity is greater than the reference value after that the femto base station terminates the algorithm of the present invention in the aforementioned exemplary embodiment in case that a terminal accessing a macro base station moves within a femtocell a femto base station of a deactivated transmission mode activates the transmission mode according to a signal intensity of the terminal in another exemplary embodiment when a terminal having been in a deactivation state or idle state within a femtocell is activated a femto base station of a deactivated transmission mode may activate the transmission mode according to a signal intensity of the terminal as illustrated in fig8 below that is when a terminal to perform communication through itself exists the femto base station of the deactivated transmission mode converts a transmit power into an on state according to a.