无线网络中具有信道感知的数据传输能耗优化策略研究  

Study on Channel-aware Energy Consumption Optimization Strategy for Data Transmission in Wireless Networks

作　　者：谢天骁 王高才[1] 彭颖[1] 

机构地区：[1]广西大学计算机与电子信息学院,南宁530004

出　　处：《小型微型计算机系统》2017年第8期1665-1670,共6页Journal of Chinese Computer Systems

基　　金：国家自然科学基金项目(61562006;61262003)资助;广西自然科学杰出青年基金项目(2013GXNSFGA019006)资助

摘　　要：无线设备电池能量有限,影响着整个无线网络的性能,同时也极大地影响着用户的网络体验.因此,降低无线终端能耗已成为提高用户网络体验的必然要求,也是构建绿色网络的一个重要课题.考虑到无线发送终端在无线信道状态好的时刻发送数据能提高能量的利用率,提出一种基于最优停止理论的数据传输能耗优化策略以最小化无线设备的能量消耗及延长电池的使用寿命.在该策略中,无线发送终端在给定的传输延时范围下周期性的侦测信道以选择信道状态最好的时刻来传输数据,但由于增加了信道的侦测次数导致数据延迟发送,所以本文引入一个折扣函数,从而将该问题转化成带折扣的秘书问题,最后求出最优停止规则.实验结果表明,本文提出的策略具有较小的单位数据平均能耗,对于提高无线网络的能效具有重要意义.The limited battery lifetime of a wireless device, which is directly related to the better experience of the wireless network users, imposes a constraint on network performance. Thus, reducing energy consumption of wireless terminals has become more and more important to the experience of the wireless network users. It is also an important task for constructing the green network. Considering that the communication is much more energy efficient which the channel conditions are good, we design and propose an energy consumption optimization strategy for data transmission based on optimal stopping theory, with a view of minimizing the energy consumption of a wireless device and prolonging its battery lifetime. In this strategy, Wireless terminals periodically detect the channel to find the moment when the channel state is the best to transmit data under a given transmission delay demand in wireless links. However, the increasing number of channel detection causes the delay of transmitting data, so we introduce a discount function to convert this prob- lem into a discounted secretary problem and find out the optimal stopping rule finally. Simulation results manifest that the proposed strategy offer significant average energy efficiency of unit data and is of great significance in improving the energy efficiency of wireless networks.

关 键 词：信道感知 最优停止理论 数据传输 带折扣的秘书问题 能耗优化 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]