基于货运列车组的传感网节点负载建模分析

Modeling and Analysis on Nodes' Traffic Load of Freight Train Based Wireless Sensor Networks

部署于货运列车组的无线传感器网络一般为线性拓扑,汇聚节点位于网络端部.由于网络的中间节点需要承担较多的传输任务,从而易导致能耗不均形成能量空洞,造成网络快速失效.对线型网络节点负载情况进行了建模以分析网络能耗分布,建立了节点和汇聚节点距离与节点负载的关系模型,并通过仿真实验证明了模型的正确性.模型能够在未来应用中对网络布设时的拓扑构建、路由协议定制等起到指导作用.

Normally the topology of wireless sensor networks on freight trains is linear. As the sink node locates at an end of such a linear network, the intermediate nodes often need to undertake the most of the transmissions for relaying and thus exhaust their energy, which induces the energy-hole problem consequently. This paper investigates the energy consumption sta- tus by modeling and analyzing the traffic load on each node of the network. The relationship between traffic load and distance to sink is modeled and then validated by simulations, which is helpful to future work such as node deployment.