基于联合优化的无线传感器网络传输可靠性研究

如何保证传输可靠性的前提下延长网络寿命是无线传感器网络应用研究所必须面对的重要课题.首先综述了功率控制以及路由度量方法的研究现状;其次通过实验研究,发现了无线传感器网络的通信链路存在着高丢失率、非对称性等特点,并通过理论推导出节点优化的发射功率;由此提出一种将功率控制和路由度量相结合的PCETX联合优化方法.最后,将此联合优化算法应用于AODV协议中,仿真结果表明使用本文提出的联合优化方法,在保证端到端的可靠性的前提下延长了网络的寿命,能够为无线传感器网络实际的应用提供有价值的参考.

Study on Reliability Transmission Based on Joint Optimization for Wireless Sensor Networks

How to improve reliability transmission and prolong networks life-span is very importance subject for wireless sensor networks. This paper firstly makes a summary to power control and the existing routing metrics then finds the several key characteristics of wireless sensor networks communication link, such as high loss rate, obvious asymmetry, according to the experimental study. From these, a joint optimization algorithm is provided which connects routing metric with power control. Finally, the joint optimization algorithm in the paper is adapted to AODV routing protocol. Simulation results show that after the joint optimization algorithm proposed in the paper is used. Networks life-span is prolonged besides for improving reliability transmission