A wireless communication apparatus for communicating with another wireless communication apparatus in an autonomous distributed network without a specific control station apparatus, said wireless communication apparatus comprising: means for setting a predetermined frame period and slots serving as data transmission units, means for setting a beacon slot for transmitting a beacon signal at a timing of the head of said frame period, and a data slot for serving as data transmission units, wherein the data slot further sets at least one reception slot for a receiving operation in said frame period, means for transmitting (108, 110) a beacon signal having information about the timing of the set reception slot, frame period and address of the wireless communication apparatus, the beacon being adapted to signal the existence of the wireless communication apparatus to another wireless communication apparatus located in the neighborhood, means for setting (112, 109) a scan period longer than said frame period, said wireless communication apparatus being characterised in further comprising: means for receiving a beacon from another wireless communication apparatus by said scanning processing, means for detecting presence of another wireless communication apparatus by receiving a beacon, from the another wireless communication apparatus, the beacon having information that includes the address information of the another wireless communication apparatus, and means for managing timing of the frame period, the means for managing timing being configured to: store in a storage means the relative timing of any detected beacons, from other wireless communication apparatuses, relative to the beacon transmitting time of the wireless communication apparatus; write the stored beacon transmitting timings from the other wireless communication apparatuses in the beacon signal of the wireless communication apparatus; designate the frame period to avoid timings which have been already used as beacon transmitting timings by the other wireless communication apparatuses. means for setting a predetermined frame period and slots serving as data transmission units, means for setting a beacon slot for transmitting a beacon signal at a timing of the head of said frame period, and a data slot for serving as data transmission units, wherein the data slot further sets at least one reception slot for a receiving operation in said frame period, means for transmitting (108, 110) a beacon signal having information about the timing of the set reception slot, frame period and address of the wireless communication apparatus, the beacon being adapted to signal the existence of the wireless communication apparatus to another wireless communication apparatus located in the neighborhood, means for setting (112, 109) a scan period longer than said frame period, said wireless communication apparatus being characterised in further comprising: means for receiving a beacon from another wireless communication apparatus by said scanning processing, means for detecting presence of another wireless communication apparatus by receiving a beacon, from the another wireless communication apparatus, the beacon having information that includes the address information of the another wireless communication apparatus, and means for managing timing of the frame period, the means for managing timing being configured to: store in a storage means the relative timing of any detected beacons, from other wireless communication apparatuses, relative to the beacon transmitting time of the wireless communication apparatus; write the stored beacon transmitting timings from the other wireless communication apparatuses in the beacon signal of the wireless communication apparatus; designate the frame period to avoid timings which have been already used as beacon transmitting timings by the other wireless communication apparatuses. means for receiving a beacon from another wireless communication apparatus by said scanning processing, means for detecting presence of another wireless communication apparatus by receiving a beacon, from the another wireless communication apparatus, the beacon having information that includes the address information of the another wireless communication apparatus, and means for managing timing of the frame period, the means for managing timing being configured to: store in a storage means the relative timing of any detected beacons, from other wireless communication apparatuses, relative to the beacon transmitting time of the wireless communication apparatus; write the stored beacon transmitting timings from the other wireless communication apparatuses in the beacon signal of the wireless communication apparatus; designate the frame period to avoid timings which have been already used as beacon transmitting timings by the other wireless communication apparatuses. store in a storage means the relative timing of any detected beacons, from other wireless communication apparatuses, relative to the beacon transmitting time of the wireless communication apparatus; write the stored beacon transmitting timings from the other wireless communication apparatuses in the beacon signal of the wireless communication apparatus; designate the frame period to avoid timings which have been already used as beacon transmitting timings by the other wireless communication apparatuses.