Abstract: Wireless sensor networks (WSNs), which are newly-emerging and application-oriented systems. Due to different requirements for the Quality of Service (QoS) imposed by different network services, QoS-supported WSNs, being characterized as “one-size-fits-all”, is the developing trend for the WSNs which provide multiple services, the improved routing protocol extends and improves the DD protocol for the data transmission of real-time services and best-effort services, so that a WSN can provide differentiated services (DiffServ). Experimental results obtained for the established simulation model show that the improved routing protocol satisfies the transmission requirements for multiple services and balances the energy consumption of the nodes in the whole network, with the network lifetime being prolonged.

摘要： 无线传感器网络（Wireless Sensor Network） 是新近发展起来的一种面向应用的网络系统。 “一次部署多种应用”的业务网络是无线传感器网络的发展趋势，而不同的业务对网络的服务质量（Quality of Service ，QoS）提出了不同的要求，改进后的路由协议针对原有定向扩散协议进行了扩展和改进，来实现实时业务和尽力而为业务的数据传输，使得无线传感器网络能够提供多种业务的区分服务.通过仿真实验结果验证了该方案能满足多种业务的传输要求又能均衡全局网络节点能量消耗，并且能够延长网络生命周期。