移动性无线传感器网络吞吐量跨层优化  

Cross-layer throughput optimization for mobile wireless sensor networks

作　　者：丁凡[1] 周永明[1] 

机构地区：[1]韶关学院物理与机电工程学院电子系,广东韶关512005

出　　处：《电子技术应用》2013年第2期100-102,106,共4页Application of Electronic Technique

基　　金：国家自然科学基金资助项目(11172181);广东省自然科学基金资助项目(10451200501004408);广东韶关学院校级科研基金资助项目(2010年207号文件)

摘　　要：采用跨层优化方法,分析了移动性无线传感器网络点对点链路的吞吐量优化问题。首先推导出吞吐量的理论表达式;以最大化吞吐量为目标,采用一种基于分层优化的数学框架,分别得到物理层最优符号速率、最优调制星座体积和MAC层最优数据包长;在此基础上,通过联合优化物理层参数和MAC层参数实现了链路吞吐量的最大化;最后提出了一种基于节点间通信距离的自适应跨层优化策略。仿真结果表明,与传统的分层优化相比,跨层优化后链路的吞吐量性能得到了明显提高。In this paper ,the throughput of point-to-point link for mobile wireless sensor networks is studied using cross-layer optimization. Firstly,the theoretical throughput expressions is derived. To maximize the throughput, an mathematical optimization framework based on hierarchical optimization is adopted. And then the optimal symbol rate , the optimal constellation size in physical layer and the optimal packet in MAC layer are derived. According to these optimization variables , the cross-layer design can be used for throughput optimization. Finally, a adaptive cross-layer optimization strategy is proposed. Simulation results show that the throughput is significantly improved with the cross-layer design compared with traditional hierarchical optimization.

关 键 词：无线传感器网络 移动性 吞吐量 跨层优化 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]