COMMUNICATION NETWORK SYSTEM, AND SLAVE UNIT, MASTER UNIT, REPEATER AND SYNCHRONIZATION CONTROLLING METHOD IN COMMUNICATION NETWORK SYSTEM

摘要

PROBLEM TO BE SOLVED: To obtain a communication network system in which synchronization accuracy can be improved. SOLUTION: This communication network system which is provided with slave units 1a to 1b performing a periodical timing operation and a master unit 2 holding timing for synchronization control Synchronous control information for synchronization control is exchanged between the slave units 1a to 1b and the master unit 2 to synchronize the timing of the units 1a to 1b with the timing of the unit 2. The communication network system is further provided with a calculating part that calculates the deviation between the timing of the units 1a to 1b and the timing of the unit 2 including the delay time of repeaters 3a to 3e, the units 1a to 1b and the unit 2 and an adjusting part which adjusts the timing of the units 1a to 1b on the basis of the calculation results of the calculating part.