When a station, which associates itself in a wireless network, wants to make transmission/reception of traffic with a certain characteristic, it makes the transmission/reception as it expects. To this end, a communication apparatus which has an access point function and station function determines if the transmission/reception of the traffic with the certain characteristic can be made in the existing wireless network. If that transmission/reception cannot be made in the existing network based on the determination result, the apparatus serves as the access point function to create a network, and communicates with a communication partner using the created network.