CAJ | 학술논문

基于多感知范围无线传感器网络中节点与目标的覆盖关系，设计了一种目标生命期评估机制。鉴于网络生命期由具有最小生命期的目标决定，在分析节点感知半径变更影响的基础上，提出了两种提高最小目标生命期的策略，建立了一个动态目标覆盖博弈模型，并证明了该博弈存在纯策略的纳什均衡。本文设计了一种分布式目标覆盖算法，算法中节点根据邻居节点的能量分布和目标覆盖情况，选用最优感知半径，以确保目标完全覆盖并延长最小目标生命期。仿真结果表明，在不同的网络中所提算法均能有效地延长网络生命期。
기우다감지범위무선전감기망락중절점여목표적복개관계，설계료일충목표생명기평고궤제。감우망락생명기유구유최소생명기적목표결정，재분석절점감지반경변경영향적기출상，제출료량충제고최소목표생명기적책략，건립료일개동태목표복개박혁모형，병증명료해박혁존재순책략적납십균형。본문설계료일충분포식목표복개산법，산법중절점근거린거절점적능량분포화목표복개정황，선용최우감지반경，이학보목표완전복개병연장최소목표생명기。방진결과표명，재불동적망락중소제산법균능유효지연장망락생명기。
Based on the coverage relationship between sensors and targets in wireless sensor networks with adjustable sensing ranges,a lifetime evaluation approach for targets is presented.Considering that the network lifetime depends on the target with minimum lifetime,this paper proposes two methods to prolong the minimum lifetime of targets based on the analysis of the influence of the change of sensing ranges,models the target coverage problem using a game theoret-ic paradigm and proves the existent of a pure strategic Nash Equilibrium.We designs a distributed algorithm(called DATC) for target coverage. In DATC,according to the energy of neighbors and the coverage of targets,each sensor chooses the best sensing range to ensure full coverage and prolong the minimum lifetime of targets.Simulation results show that DATC can prolong the network lifetime effectively in different network scenarios.