Radio communication system, and apparatus, method, and computer program for said radio communication system

This invention permits the coexistent of a plurality of UWB radio communication networks which use different signal systems. The object is achieved by using the same beacon signal and specifying the format of part of the control command among a plurality of UWB radio communication networks which use different signal systems (for impulse period, impulse width, spreading ratio, and spreading code). When one UWB network receives a beacon signal from another UWB network, it grasps, judging from the received beacon signal, the transmission parameter which is used by another party and performs time-division on the transmission frame period for one's own system.