CAJ | 학술논문

数据收集是无线传感器网络的一个基本功能.由于部署在基站周围的传感器节点承担着网络内大部分的负载,因此导致能量迅速耗尽,现有的基站移动策略可以通过基站的移动实现网络内传感器节点的负载平衡以延长网络寿命.但是现有负载平衡的基站移动策略只能在传感器节点被均匀布撒的情况下才能有效地延长网络寿命,其他情况下不能达到延长网络寿命的效果.因此本文定义了点能量概念用以表示传感器网络对感知区域每个点的感知能量,并给出了有效的点能量密度计算方法.通过点能量密度消耗分析,提出了一种点能量密度平衡的基站移动策略(energy-density-balance base station movement,简称EDB-BSM).通过理论分析和仿真试验验证,相对于固定基站模式和基站随机移动模式,该移动策略能够在各种传感器节点分布情况下有效的延长网络寿命,并具有良好可扩展性.
수거수집시무선전감기망락적일개기본공능.유우부서재기참주위적전감기절점승담착망락내대부분적부재,인차도치능량신속모진,현유적기참이동책략가이통과기참적이동실현망락내전감기절점적부재평형이연장망락수명.단시현유부재평형적기참이동책략지능재전감기절점피균균포살적정황하재능유효지연장망락수명,기타정황하불능체도연장망락수명적효과.인차본문정의료점능량개념용이표시전감기망락대감지구역매개점적감지능량,병급출료유효적점능량밀도계산방법.통과점능량밀도소모분석,제출료일충점능량밀도평형적기참이동책략(energy-density-balance base station movement,간칭EDB-BSM).통과이론분석화방진시험험증,상대우고정기참모식화기참수궤이동모식,해이동책략능구재각충전감기절점분포정황하유효적연장망락수명,병구유량호가확전성.
Data gathering is the basic function of wireless sensor networks. Because the sensor nodes located near a base station have to relay data for a large part of the network and thus deplete their batteries very quickly, present base station movement strategies can realize network load-balance by mobile base station. Load-balance base station movement schemes are not available to improve network life unless the sensor nodes are distributed uniformly. Thus, the concept of point energy density is defined in this paper to represent the energy which every point used to sense environment,and an effective method for calculating point energy density is proposed. In this paper, an EDB-BSM ( energy-density-balance base station movement) strategy is proposed after analyzing the point energy density dissipation. Compared with the static base station scheme and the random base station movement scheme, EDB-BSM can improve network life in every condition of sensor node distribution, and it is proved to be extensible.