无线Ad hoc网络中的随机功率控制

Random Power Control in the Wireless Ad hoc Networks

由于能量的限制,无线Ad hoc网络面临网络生存时间、无线资源利用效率以及时延要求等方面的挑战.无线Ad hoc网络中的功率控制已经成为研究领域中的一个热点,其主要目的是降低网络在分发数据包中的能量消耗,降低网络中的通信干扰.为了节省网络能量消耗,提出了一种随机功率控制的方法,其核心是让节点的发射功率随机分布在一个功率区间.通过对随机功率控制和固定功率控制在成功传输概率和网络节能上的理论分析和数值计算比较发现,合理选择随机功率控制中的最小发射功率,可获得与固定功率控制相当的成功传输概率,并能节省网络能量消耗,延长网络生存周期.

Due to energy limitation, the wireless Ad hoc networks face to the challenge of lifetime, wireless resource utilized efficiency and delay. Now, the power control in the wireless Ad hoc networks has been the focus of extensive research, its main objectives are to reduce the total energy consumed in packet delivery, reduce the interference to other users in the network. For energy reserving, a method of Random Power Control （RPC） is proposed, the RPC lets the transmission power of nodes randomly distribute in an interval.By theoretic analyzing and numerical computing in the successful transmission probability and average transmitting power of RPC and fixed power control, it indicates that when choosing the proper minimum transmission power in the RPC, the successful transmission probability is almost the same as the fixed power control, the energy consumed is lower, and the lifetime of network is prolonged.