移动环境下能量感知的协同内容分发策略研究  

Study on Energy-aware Cooperative Content Distributed Strategy in Mobile Environment

作　　者：王权[1] 彭颖[2] 王淖[1] 王高才[1] 林俊华[3] 蔡宁生 

机构地区：[1]广西大学计算机与电子信息学院,南宁530004 [2]广西大学电气工程学院,南宁530004 [3]中兴通讯股份有限公司西安研究所,西安710065 [4]广西壮族自治区交通规划勘察设计研究院,南宁530011

出　　处：《小型微型计算机系统》2015年第12期2808-2812,共5页Journal of Chinese Computer Systems

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

摘　　要：在移动环境下,因为短距离无线技术在传输能效和速率上高于长距离无线技术,所以多个移动终端通过无线基站下载共同感兴趣内容时,移动终端之间相互协同进行短距离收发内容比长距离直接接收内容会消耗更少的能量.提出一种具有能量感知的协同内容分发策略.根据无线技术的特点和移动终端的能耗特征,抽象出该策略的能耗优化模型,然后运用基于最小生成树的分布式算法对该模型求解.在NS-2仿真实验中,将本文提出的策略与能耗最小方案以及无协同方案进行比较,给出该策略在节能和能耗公平性的对比结果,结果表明该策略不仅能降低移动终端所消耗的总能量,而且兼顾各移动终端能量消耗的公平性.In mobile environment,mobile terminals will consume less energy if they download common interesting content each other by using short-range wireless technology. This paper presents an energy-aware cooperative content distribution strategy. According to characteristics of wireless technology and energy consumption of mobile terminals ,we first construct an energy-aware model of energy consumption optimization with fairness constraint and then solve it by using MST （ Minimum Spanning Tree ） -based distributed algo- rithm. We obtain simulation results by using NS-2 tool, and comparing with the minimal energy consumption and the no-cooperation scheme in total energy consumption and the fairness of energy consumption. Performance results show that the proposed strategy de- creases the total energy consumption significantly at mobile terminals, and get the balance at the energy consumption.

关 键 词：移动环境 能量感知 能耗优化 能耗公平 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]