ap the target ap to which the sta intends to gain access is in operation and the discovery interval beacon transmission time and bss load information of the fifth ap based on the information on the neighbor ap on other channel included in the received discovery frame for example the sta may recognize that the fifth ap is in operation on the third channel through the information on the neighbor ap on other channel included in the discovery frame the sta may shift the scanning channel to the third channel and the sta may transmit a probe request frame 1300 including the identifier information of the fifth ap the sta may receive a probe response frame transmitted from the target ap in response to the probe request frame 1300 the sta may obtain the information on the target ap shift to the channel on which the target ap operates and immediately perform active scanning or the sta may also determine which one of active scanning and passive scanning the sta is to perform through an additional determination for example the sta may determine whether there is much load of the target ap through the bss load information of the target ap in case the load of the target ap is high it may be difficult to obtain a medium to transmit a probe request frame 1300 that is transmitted to separately perform an active scanning procedure accordingly in case the load of the target ap is high the sta may perform a scanning procedure by monitoring a beacon frame transmitted from the target ap as described above in connection with fig8 without transmitting a probe request frame 1300 for transmitting active scanning as another example the sta may also determine whether to switch scanning modes through the information on.