DATA TRANSMITTER, DATA RECEIVER, AND DATA TRANSMISSION CONTROLLER

摘要

The procedure for acquiring a band is simplified by expressing the propagation delay of a communication medium by using an identifier. After stopping the transmission from a first transmitter (806), a band acquiring means (809) of a second transmitter (814) finds the band which has been used by the first transmitter (806) by using a propagation delay identifier (804) read out from the first transmitter (806) and the maximum transmitted data quantity (805), and starts transmission by using the band. Therefore, the required procedure is simplified, because return and re-acquisition of band are not required at the time of switching the transmitter. In addition, since the propagation delay identifier is used, the band can be utilized effectively.