基于IEEE1588V2的无线网络时间同步技术

Wireless Network Time Synchronization Technology based on IEEE1588V2

目前移动设备普遍采用GPS、北斗等卫星授时方式来获取时间,该方式技术成熟,授时精度高,但是卫星信号容易被干扰,仅仅依赖卫星授时存在风险。提出将IEEE1588V2应用到无线时间同步领域,在更底层获取时间戳,减少网络传输时间的抖动;对路径时延采用卡尔曼滤波算法,减少网络传输时间的抖动;修正协议算法逻辑,使其适应无线网络环境,从而获取更加精确的传输时延,提高无线时间同步精度。

At present,mobile devices generally use GPS,Beidou and other satellite timing methods to acquire time.This method has mature technology and high timing accuracy,but satellite signals are easy to be interfered,and there is a risk to rely soly on satellite timing.It is proposed to apply IEEE1588V2 to the field of wireless time synchronization to obtain the timestamp at a lower level to reduce the jitter of network transmission time.Kalman filtering algorithm is used for path delay to reduce the jitter of network transmission time,and the protocol algorithm logic is modified to adapt it to the wireless network environment,thereby obtaining more accurate transmission delay and improving wireless time synchronization accuracy.