Data communication method, data communication system and program

The invention claims a data communication method, data communication system and program. The invention reduced in broadcast communication is connected to the information the total number, which the communication way effectively a bandwidth, and which is provided with a error rate is pre-formed. Transmitting the data radio to recipients of step (11), calculates circuit and maximum information of step (13) which is originating, computer with a reimbursed time step (14). The maximum message length and reimbursed time transmitting the is originating step (15), and a return message in the maximum message length range of the is originating assigns endogenous step (17), any time transmission of the reimbursed time of methods loop comprises a message step (19).