计算机工程
計算機工程
계산궤공정
COMPUTER ENGINEERING
2013年
9期
59-63
,共5页
郭立侠%孟宪臣%陈家乐%秦宁宁%徐保国
郭立俠%孟憲臣%陳傢樂%秦寧寧%徐保國
곽립협%맹헌신%진가악%진저저%서보국
无线传感器网络%覆盖空洞%PATT算法%冗余节点%最佳候选节点
無線傳感器網絡%覆蓋空洞%PATT算法%冗餘節點%最佳候選節點
무선전감기망락%복개공동%PATT산법%용여절점%최가후선절점
Wireless Sensor Network(WSN)%coverage hole%PATT algorithm%redundant node%the best candinate node
针对无线传感器网络中因节点分布不均或死亡而导致的覆盖空洞现象,对PATT算法进行改进,提出一种基于最佳候选节点的空洞修补算法。将目标区域内休眠的冗余节点作为候选节点,确定待修补空洞的位置,当移动冗余节点到空洞之间的距离在可控范围时,则激活该冗余节点作为最佳候选节点修补空洞。如超过可控范围,则追加二代移动节点进行修补。实验结果表明,该算法不受覆盖空洞形状的限制,可保证网络覆盖率大于90%,同时减少了额外追加二代移动节点的个数,使网络性能得到改善。
針對無線傳感器網絡中因節點分佈不均或死亡而導緻的覆蓋空洞現象,對PATT算法進行改進,提齣一種基于最佳候選節點的空洞脩補算法。將目標區域內休眠的冗餘節點作為候選節點,確定待脩補空洞的位置,噹移動冗餘節點到空洞之間的距離在可控範圍時,則激活該冗餘節點作為最佳候選節點脩補空洞。如超過可控範圍,則追加二代移動節點進行脩補。實驗結果錶明,該算法不受覆蓋空洞形狀的限製,可保證網絡覆蓋率大于90%,同時減少瞭額外追加二代移動節點的箇數,使網絡性能得到改善。
침대무선전감기망락중인절점분포불균혹사망이도치적복개공동현상,대PATT산법진행개진,제출일충기우최가후선절점적공동수보산법。장목표구역내휴면적용여절점작위후선절점,학정대수보공동적위치,당이동용여절점도공동지간적거리재가공범위시,칙격활해용여절점작위최가후선절점수보공동。여초과가공범위,칙추가이대이동절점진행수보。실험결과표명,해산법불수복개공동형상적한제,가보증망락복개솔대우90%,동시감소료액외추가이대이동절점적개수,사망락성능득도개선。
Aiming at the phenomenon of coverage holes because of energy depletion and random nodes deployment in Wireless Sensor Network(WSN), a strategy for hole recoverage based on best candidate node is proposed. This strategy increases redundant nodes which hibernate as the candidate nodes in the target area, and selects the best candidate node from redundant nodes to patch the hole based on repaired position. If it is in the controllable range that the redundant node will be actived as the best candidate node and be moved based on repaired position to patch the hole. Otherwise, the second generation mobile node will be used to patch the hole. Experimental results show that the strategy is not limited by coverage hole shape, and can reduce the extra second generation mobile node number in the premise of ensuring the network coverage of no less than 90%, which improves the performance of WSN significantly.