潮间带无线传感器网络路由算法

以潮间带无线传感器网络（IT-WSN）为例进行深入研究，提出期望剩余传输次数（PRTX）算法.PRTX算法充分考虑网络端到端延迟时间、节点剩余能量、邻居节点之间的距离，以及链路质量，形成一个综合性的路由判据，并利用指数加权平均算法加强路由选择的稳定性.仿真实验结果表明，PRTX路由算法在网络生命周期上比经典算法期望传输次数（ETX）提升了约19%，保障了较高的收包率，并且在节点通信距离变化时具有较好的性能稳定性.同时仿真实验与实际实验都表明，PRTX算法在网络端到端延迟时间上比经典的ETX算法降低了约10%，并提升了网络能量消耗的均衡性.
Abstract: A wireless sensor network deployed in intertidal environment (IT-WSN) was deeply investigated. An improved routing algorithm called predicted remaining transmission count (PRTX) was proposed. PRTX combined parameters including end-to-end delay, residual energy, distances between neighbor nodes and link quality to construct a comprehensive routing metric. Moreover, the exponentially weighted moving average algorithm was applied to enhance stability of routing selection. The simulation results demonstrate that the proposed PRTX routing algorithm improves the performance of the network lifetime by about 19% compared with the classical expected transmission count (ETX) algorithm, while guaranteeing high packet delivery ratio. Furthermore, PRTX algorithm performs well with different node communication radiuses. Additionally, both the simulation and the field test results demonstrate that PRTX algorithm deceases the end-to-end delay by about 10% compared with the classical ETX algorithm, and improves the equilibrium of network energy consumption.