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传统的基于分组消息交换的无线传感器网络(WSN)同步方式很难做到同时兼顾同步精度和能耗。本文提出了一种基于分组消息交换的协作时间同步方法(CTS):对同步分组信息交互过程进行分析得出,协作中继的引入不会改变同步精度。通过协作中继对收发两端的同步分组信息进行接收转发来降低发射功率、降低能耗。理论分析和计算机仿真都表明在不降低同步精度的前提下,通过引入协作中继能达到降低能耗的目的,在视距信道模型中最大可达到4倍能耗效率。
The traditional wireless sensor network (WSN) synchronization method based on packet exchange is difficult to achieve synchronization accuracy and energy consumption. This paper proposes a CTS method based on packet message exchange. The analysis of the information exchange process of synchronization packets shows that the introduction of cooperative relay will not change the synchronization accuracy. Reduce the transmit power and reduce the energy consumption by receiving and forwarding the synchronous packet information of both ends of the sending and receiving through the cooperative relay. Both theoretical analysis and computer simulation show that energy consumption can be reduced by up to four times in the line-of-sight channel model by introducing cooperative relays to reduce energy consumption without reducing the synchronization accuracy.