PRECISE SYNCHRONIZATION TYPE NETWORK DEVICE, NETWORK SYSTEM, AND FRAME TRANSFER METHOD

摘要

PROBLEM TO BE SOLVED: To provide a technique for reliably transferring a synchronization frame between network devices even if congestion, or the like in a network occurs since the network devices cannot be synchronized in cycle type transfer communication when the synchronization frame is not received regularly.

SOLUTION: The network device arranges the synchronization frame for synchronizing network devices in the network in the first period of each cycle for transfer. The network device has: a cycle timer for measuring time in the cycle; and a synchronization management section for stopping the transmission of the frame for a prescribed period to the next cycle in each cycle, based on information from the cycle timer.

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