一种基于功率控制的无线传感器网络跨层通信协议

A Power Controlled Cross-Layer Communication Protocol for Wireless Sensor Network

提出一种新的跨层通信协议基于功率控制的定向生成树(PCDST).本协议采用定向生成树算法以解决数据传输过程中的无效能耗问题,并控制节点的传输功率以降低网络通信竞争强度.为了更好地控制传输功率这一关键因素,构建了一个网络效用最大化模型,并基于原始-对偶算法设计拉格朗日对偶函数,推导出传输功率的最优解集.这些跨层策略的应用能够使无线传感器网络在节能的同时保持良好的通信状态.仿真实验结果表明,本协议在节约能量和提高通信吞吐量方面具有很好的表现.

A novel cross-layer communication protocol is proposed and named power controlled directed spanning tree（PCDST）,where a directed spanning tree routing algorithm is introduced to solve the problem of unnecessary energy consumption during data transmission and control the transmission power of node so as to moderate the competition intensity in communication network.A network utility maximum（NUM）model is developed to control further the transmission power that is regarded as a key factor.Based on the Prim-dual algorithm, a Lagrange dual function is designed to deduce the optimal solution set of transmission power. Taking advantage of such cross-layer strategies, WSN is enable to keep up smooth communication with energy saving. The simulation results showed that the performance of the proposed protocol is much better in both energy efficiency and improvement of communication throughput.