| 摘要 |
A relay communication device includes a first communication unit, a second communication unit, and a communication buffer. When receiving data in the first communication unit, each relay communication device temporarily accumulates the data in the communication buffer. The relay communication device functioning as a master asks the relay communication device functioning as a slave if there is data in the communication buffer. The master grants transmission permission to the slave that has returned a reply indicating that there is data. The slave that has received the transmission permission transmits the data to a slave that is a destination of the data. The master makes an inquiry into a next slave in the case where the slave which has been granted the transmission permission completes the transmission of the data from the second communication unit. The allowed amount of data transmitted by each relay communication device at one time is limited. |
