| 摘要 |
PROBLEM TO BE SOLVED: To provide a time synchronous communication system capable of surely performing synchronization even when re-relay processing occurs when a synchronization source communication device transmits a synchronous time to a synchronization destination communication device.SOLUTION: A communication time TT of operation state request information from a trap operation state management device 120 to a trap operation state providing device 110 requires ((number NO of inter-node communication in the shortest communication path)×(unit inter-node communication time t0 needed between respective nodes)=time TT1)+((unit re-relay processing time t1 required for re-relay processing of one time)×(number N-NO of re-relay processing)=time TT2). Thus, in the trap operation state providing device 110, (synchronization waiting time Ta)-(communication time TT(=TT1+TT2))-(processing time TC1 in the trap operation state providing device 110)=synchronization processing start waiting time TW, and the time of a timing circuit 110j is set to synchronization time T after the elapse of the synchronization processing start waiting time TW.SELECTED DRAWING: Figure 14 |
