几种IEEE 1588对时实现方法的分析与比较

摘要

For the purpose of time synchronization in different situations, several IEEE 1588 time synchronization methods are analyzed and compared with each other. An experiment to measure the affect accuracy of clock synchronization with different methods statistically is carried out. The results show that the methods with hardware assistance can reach an accuracy less than a microsecond and the method realized fully by software can reach an accuracy less than a millisecond. This is instructive and referential to choose an appropriate IEEE 1588 time synchronization method to realize expected effect with the least cost.%为了满足不同场合下对时钟同步的需求,分析和比较了几种不同IEEE 1588对时的实现方法,并通过实验测量统计了不同方法的对时精度.结果表明采用硬件支持的IEEE 1588对时方法可以实现亚微秒级的对时精度,采用纯软件实现的IEEE 1588对时方法可以实现亚毫秒级的对时精度.这对于选择合适的IEEE 1588对时方式,以最少的资源实现预期的对时效果具有参考指导意义.