基于时分复用的无线传感器网络生命周期研究  

Cross-layer Lifetime Optimization in TDMA-based Sensor Networks

作　　者：高强[1] 杨宇航[1] 王晖[1] 

机构地区：[1]上海交通大学电子工程系,上海200240

出　　处：《通信技术》2009年第6期84-86,共3页Communications Technology

摘　　要：在无线传感器网络中,综合考虑网络层、MAC层、物理层的网络生命周期最大化问题是一个非凸优化问题。文章基于同步小规模网络,采用没有链路干扰的时分复用(TDMA)调度技术和可变调制星座体积的传输方案,将非凸优化问题转换为一个凸优化问题[3]。毫无疑问,物理层参数的适应性可以提高网络生命周期,但是当物理层不存在适应性的情况下,文章提出一种迭代算法,能够使网络生命周期接近物理层参数变化时所获得的最大网络生命周期。The integrated consideration os the physical, MAC and routing layers to maximize network lifetime is complex and hard to solve directly. This paper focuses on synchronous small-scale networks with interference-free link scheduling and practical MQAM link transmission schemes. In this case, the optimization problem is closely approximated as a convex optimization problem, and thus could be efficiently solved. How the modulation rate affects the network lifetime is also explored. The simulation indicates that the network lifetime is prolonged with the link adaptation.

关 键 词：无线传感器网络 跨层优化 网络生命周期 物理层的适应性 时分复用 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]