DATA COMMUNICATION DEVICE, DATA COMMUNICATION SYSTEM, AND DATA COMMUNICATION CONTROL METHOD

摘要

Provided is a data communication device (1) applied to a data communication system which performs switching between a half-duplex communication and a full-duplex communication of all the lines between two data communication devices.  The data communication device (1) (such as a master communication device) manages priority of data being transmitted by a full-duplex communication to a communication device (1) of the communication partner (such as a slave communication device) and receives a priority (slave priority) of next data to be transmitted by the slave communication device from the slave communication device.  The priority of the data being transmitted and the slave priority are used to make an adjustment whether to continue the data transmission by the full-duplex communication or give to the slave communication device, a right to temporarily interrupt the full-duplex communication and perform a half-duplex communication.  This enables a communication control for switching between the half-duplex communication and the full-duplex communication of all the lines by considering the priority of the data to be transmitted.