Patent ID: 8155047

Claim:
A communication station comprising: a reception unit constructed to receive data from a transmission station; a response unit constructed to transmit a reception response representing a reception condition of the data by the reception unit; a determination unit constructed to determine, based on reception responses from other communication stations, whether an unreceived communication station which has not normally received the data from the transmission station exists among the other communication stations, and to determine whether one of the other communication stations, which has normally received the data from the transmission station, has a higher transmission priority order than a transmission priority order of the communication station; and a transfer unit constructed to, when the reception unit has normally received the data from the transmission station, and the determination unit has determined that the unreceived communication station exists, and has determined that no other communication station, which has normally received the data from the transmission station, has a higher transmission priority order than the transmission priority order of the communication station, transfer the data received by the reception unit to the unreceived communication station, wherein when the reception unit has not normally received the data from the transmission station, the reception unit receives the data which is transferred thereto by one of the other communication stations which has normally received the data, and wherein the transmission priority order defines a transmission priority order of each station in a relay timeslot in which the data transmitted from the transmission station is relayed, and the transfer unit performs the transfer based on the transmission priority order.