摘要
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。
It is very difficult to give consideration to either the synchronization precision or the energy consumption for traditional time synchronization scheme of wireless sensor network(WSN) based on packed message exchange.This article proposed a kind of cooperation time synchronism scheme(CTS) based on the packed message exchange.The synchronization precision will not to be changed if the relay is adopted,according to the analysis of process for the synchronization packet message exchange.Cooperation relay receives and forwards both sides of the synchronization packet message,the energy consumption of can be lowered.This scheme can lower the energy consumption on condition that it can not lower the synchronization precision.It can gain four times of energy consumption efficiencies most greatly by the means of theoretical analysis and the computer simulation in the channel of line-of-sight(LOS).
出处
《无线通信技术》
2012年第4期20-24,共5页
Wireless Communication Technology
基金
中煤科工集团西安研究院技术创新项目(2010XAYCX014)
