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COMMUNICATION APPARATUS, SYNCHRONOUS COMMUNICATION SYSTEM, COMMUNICATION INTERFERENCE SUPPRESS METHOD AND COMPUTER-READABLE RECORDING MEDIUM RECORDED WITH COMMUNICATION INTERFERENCE SUPPRESS PROGRAM TO SUPPRESS INTERFERENCE BETWEEN PLURALITY OF SYNCHRONOUS COMMUNICATION SYSTEMS IN SAME SPACE
COMMUNICATION APPARATUS, SYNCHRONOUS COMMUNICATION SYSTEM, COMMUNICATION INTERFERENCE SUPPRESS METHOD AND COMPUTER-READABLE RECORDING MEDIUM RECORDED WITH COMMUNICATION INTERFERENCE SUPPRESS PROGRAM TO SUPPRESS INTERFERENCE BETWEEN PLURALITY OF SYNCHRONOUS COMMUNICATION SYSTEMS IN SAME SPACE
A synchronous communication system (referred to as system hereinafter) includes one host and at least one peripheral carrying out synchronous communication with the host under control of the host in a predetermined order. When a plurality of adjacent systems are present, the system includes a transmission unit, a reception unit, an error count unit, a packet count unit and a communication timing control unit in the host. The transmission unit transmits a control packet to a peripheral. The reception unit receives from a peripheral a response packet corresponding to the control packet transmitted from the transmission unit. The error count unit counts the number of occurred communication errors and the number of times a response packet was not received by the reception unit within a constant period where synchronous communication is carried out. The packet count unit counts how many of packets transferred in another system is received by the reception unit in the constant period. The communication timing control unit provides adjustment to delay the synchronous communication start timing when determination is made according to the count results that communication interference is occurring between the systems.
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