无线网状网信标时钟同步系统设计

Design of wireless mesh network beacon clock synchronization system

为了实现无线网状网骨干节点与接入节点之间的同步,各节点采用信标同步技术,提出一种软硬结合的信标同步技术,设计一种同步信号产生算法,在现有实验平台上测量节点之间的时间差,利用CPU内部时钟GPT来产生同步定时中断,此同步定时中断需要用测量的时间差对下一个1PPS的起始时刻进行修正,以求达到同步。最后给出了误差分析,以求在后续的研究中给予改进。

To realize the synchronization between the wireless mesh network backbone node and access node, each node uses beacon synchronization technology, a combination of hardware and software in the beacon synchronization technology is proposed, the algorithm of a synchronous signal is designed, on the existing experimental platform, the time difference between the measurement nodes is measured, the CPU internal clock is used to generate timing synchronization, the synchronization timing needs to be corrected by measuring the time difference of the starting time of the next 1PPS, in order to achieve synchronization. Final ly error analyses are provided to improve study in the future.