一种无线传感器网络以数据为中心的QoS路由协议

New Data-Centric QoS Routing Protocol for Wireless Sensor Networks

提出一种以数据为中心的QoS路由协议(DDQP).DDQP支持两种QoS度量:可靠性和传输延迟;采用交叉层优化技术将传感器网络无线信道通信模型作为路由协议设计的依据,有效的节约了网络能源消耗;采用反压力重新路由机制在满足业务QoS的前提下尽可能均匀使用网络中节点的能源,不仅延长了网络生命期,而且有效的控制网络拥塞;采用以数据为中心的数据分发模式,具有良好的可扩展性.描述了DDQP设计的理论依据,并通过仿真实验验证了DDQP的高效可行性.

This paper proposes a link estimation scheme, and presents a new data-centric QoS routing algorithm based on directed diffusion, called DDQP. DDQP focuses mainly on two QoS domains, namely, timeliness and reliability; it improves transmission reliability and conserves energy consumption by using cross-layer scheme which is our routing protocol exploits the statistical nature of wireless communication of sensor networks; it decreases network congestion and balances the energy consumption on each node by using back-pressure re-routing. Simulation experimental results show that DDQP is more energy efficient than DD.