An own-group storage area in which beacon information concerning a group of the own device is stored and an other-groups storage area in which beacon information concerning other groups different from the group of the own device is stored are allocated to a memory area of a wireless communication device in a network. The wireless communication device includes storage means for storing the beacon information concerning the other groups in the own-group storage area and the other-groups storage area in the same structure as that of the beacon information concerning the group of the own device.