无线传感器网络中双信道无信标实时路由协议

Dual-channel Beaconless Real-time Routing Protocol for Wireless Sensor Networks

针对事件驱动等应用中感知数据急剧增大的高负载网络环境,提出基于无信标转发的双信道实时路由协议DBRR,该协议采用采用竞争模式与邻居表相结合的转发策略,竞争模式在线地选择有效的转发节点,并使用双信道方式缓解高负载下的网络冲突。DBRR通过速率约束和单跳延迟约束来满足实时性,它邻居表信息是通过竞争和无线广播特性而不是信标广播方式获得。仿真结果表明,在高负载性网络中,DBRR在数据传输成功率、传输延迟、平均能耗和通信代价等方面均明显优于SPEED。

Presents a dual-channel beaconless real-time routing protocol, called DBRR, for high-load wireless sensor networks （WSNs）. End-to- end real-time requirements are fulfilled with speed or delay constraint at each hop through integrating the contention and neighbor table mechanisms. DBRR incorporates a dual-channel paradigm to alleviate packet collisions so as to lessen energy consumption and shorten end-to-end delay in high-load networks. Comprehensive simulations are carried out and show that DBRR outperform SPEED in terms of delivery ratio, end-to-end delay, energy efficiency and communication cost in high-load networks.