Patent ID: 7742784

Claim:
A wireless communication system comprising: a plurality of communication stations configured to construct a decentralized-autonomous network where a plurality of channels are prepared without a control station controlling the plurality of communication stations under a communication circumstance, wherein, at least one communication station of said plurality of communication stations is configured to: prepare a plurality of operation modes, each of the plurality of operation modes corresponding to a different level of power consumption at the at least one communication station and indicating a different distribution of time periods during a predetermined time frame period of when the at least one communication station executes a receiving process to receive transmissions over one of said channels, wherein the plurality of operation modes includes a first operation mode which has a minimum total time over the predetermined time frame period for executing a receiving process, the first operation mode corresponding to a lowest level of power consumption, and over each of the remaining operation modes the total time for executing a receiving process increases in increments such that there is a last operation mode which has a maximum total time over the predetermined time frame for executing a receiving process, the last operation mode corresponding to a highest level of power consumption, set an information relating to an operation mode from the plurality of operation modes; inform the other communication stations of the set information relating to the operation mode, receive information relating to an operation mode of at least one of the other plurality of communication stations which indicates a distribution of time periods during the predetermined time frame of when the at least one of the other plurality of communication stations executes a receiving process to receive transmissions over the one of said channels, and set an information relating to a transmitting mode indicating a distribution of time periods during the predetermined time frame period for transmitting data to the at least one of the other plurality of communication stations to coincide with the distribution of time periods indicated in the information relating to the operation mode received from the one of the peripheral stations.