一种基于代价梯度的无线传感器网络QoS路由协议

A Routing Protocol of QoS-Supported Wireless Sensor Network Based on Cost-Gradient

支持"一次部署多种应用"是无线传感器网络的发展趋势,这要求路由协议能区分不同QoS的数据分发。本文通过对传统定向扩散路由(DD)算法的扩展,在保证业务可靠性的前提下,组合利用"路径最小能耗"和"最小跳数"信息,以及加次优路径等思想,提出一种区分数据业务和实时业务的QoS路由算法。仿真结果表明,扩展后的算法能满足业务的可靠性要求,且随信道错误率的增加,能均衡网络节点能耗和延长网络生命期。

As a trend for the Wireless Sensor Network（ WSN）, supporting ‘one- size -fits- all＇requires muting protocols to provide multiple services for data transmissions on different QoS. By extending and improving the DD protocol, this paper proposes a new distributed QoS muting algorithm according to minimum path energy＆minimum hop counts＇which differentiates services for both real - relia time traffic and best - effort traffic at the precondition of reliability. Based on the analysis of result about the simulation, both the bility of the two traffics is achieved, and the improved muting protocol balances the energy consumption of the nodes in the whole network , with the network lifetime being prolonged.