Patent ID: 7474674

Claim:
A data relay processing method comprising the steps of, sending pieces of information from a plurality of respective terminals, including a piece of information on a schedule of usage of a transmission band by the beginning of a predetermined term, another piece of information on a schedule of the transmission band which is available to be assigned at the time of the beginning of the predetermined term, another piece of information on a schedule between the beginning and end of the predetermined term defining a duration of the predetermined term where the transmission band is available to be partially assigned or partially exchanged by the beginning of the predetermined term, maintaining constant from the beginning of the predetermined term and during the entire duration of the predetermined term each respective schedule of each respective terminal; based on the schedule of usage, the schedule of transmission band, the schedule of predetermined term, and the communication price partially reserving or partially assigning the transmission band between the respective terminals, recording a processing record comprising past partial assignments and partial exchanges by each terminal, transmitting the recorded processing record to each respective terminal within an announcement distance range during an announcement time interval, partially assigning and partially exchanging a predetermined amount of the transmission band between the plurality of respective terminals at the time of the beginning of the predetermined term for maximizing the usage efficiency of all the available transmission band during the predetermined term duration based on the schedule of usage of the transmission band and the schedule of the transmission band which is available to be assigned, and controlling the announcement range and announcement interval by the processing record.