Research On Fault Tolerant Algorithm Of IEEE1588v2 Clock Synchronization Signal Based On Ptolemy Ⅱ

Network communication system and distributed control system are used more and more widely, time synchronization requirements are also getting higher and higher. So there is important research significance and application prospect to further enhance the distributed network system time synchronization accuracy and stability, in order to adapt to the complex network environment and signal fluctuation interference.EEE1588v2 is currently the network clock signal synchronization protocol of high accuracy for the networked measurement and control systems. The protocol can be more suitable for the application in various communication networks and distributed systems and time measurement synchronization. But in clock network, the IEEE1588v2 clock synchronization signal errors will occur with disturbance and fluctuation of node fault or path delay, and affect the correct and accurate of the slave clock signal synchronization. This paper presents a complex network system clock synchronization signal fault tolerance algorithm, based on the IEEE1588v2 transparent clock and point to point delay measurement, which can effectively prevent the abnormal clock signal and node failure influence on target resulting from a clock and improve the time synchronization accuracy and stability.To verify the correctness and effectiveness of the algorithm, the PtolemyⅡ simulation modeling software is used to built the clock network system. Through the test analysis of clock synchronization signal models of complex network system, it is proved that the transparent clock and point to point path delay measurement mechanism proposed in IEEE1588v2 have better clock synchronization performance and precision compared to the previous version, especially in multi-node cascaded network structure. Than the correctness and effectiveness of the clock synchronization signal fault tolerant algorithm is verified by complex network system model constructed in PtolemyⅡ. Node clock adaptive ability is enhanced in the effects of network environment with unpredictable changes.