基于传输功率和数据包尺寸的优化网络寿命的研究

摘要

在无线传感网络中,数据包长度和传输功率等级成为影响能量效率和网络寿命的关键因素.为此,提出基于传输功率和数据包长度的联合优化网络寿命算法,记为TP-PS-INL.首先,依据Mica2传感节点的能量消耗特性和无线信道模型,构建链路层模型,然后再利用链路层模型,建立混合整数规划MIP模型,进而联合优化传输功率和数据包长度,最大化网络寿命.数值仿真分析表明,MIP模型能较准确地反映数据包长度和传输功率对网络寿命的影响,并且TP-PS-INL算法能够最大化网络寿命.%The data packet size and transmission power level in wireless sensor networks(WSNs)become the crucial fac-tors to influence the energy efficiency and network lifetime. Therefore,a network lifetime optimization algorithm TP-PS-INL based on transmission power and data packet size is proposed. According to energy consumption characteristics of Mica2 sensing node and wireless channel model,the link layer model is constructed. On this basis,the mixed integer programming(MIP) model is established to optimize the transmission power and data packet size,so as to make the network lifetime maximization. The numerical simulation analysis result shows that the MIP model can accurately reflect the influence of data packet size and transmission power on network lifetime,and the TP-PS-INL algorithm can maximize the network lifetime.