系统工程与电子技术
繫統工程與電子技術
계통공정여전자기술
Systems Engineering and Electronics
2015年
10期
2376-2382
,共7页
无线传感网%簇维护%能量高效%多模%自适应
無線傳感網%簇維護%能量高效%多模%自適應
무선전감망%족유호%능량고효%다모%자괄응
wireless sensor networks%maintenance of clusters%energy-efficient%multi-mode%adaptive
无线传感网因节点众多、应用场景多样和资源约束严格而具有复杂的分布特征、组网灵活性和高度动态性，基于簇的网络管理模式面临着如何实现针对不同的簇受损情形的高效簇维护问题。建立了一种可以适应不同簇维护需要的多模簇维护机制，以自适应局域按需簇维护为目标，根据网络中簇的动态变化时间和空间进行分类簇维护，将簇维护转化为局部性和事件触发的操作，触发机制包括簇头剩余能量低于设定阈值、簇头负载不均、新节点加入或簇内节点失效退出等，基于单个簇或相邻簇的状态变化关系启动单簇（簇内）维护或多簇（簇间）维护方案。基于 NS2的仿真结果表明：与传统周期性、全网重新成簇的维护模式相比，该机制能够明显降低网络维护开销，有效均衡网络节点能耗、增加传输的数据包总量、100％节点存活时网络的平均生命周期最高可延长1．8倍。
無線傳感網因節點衆多、應用場景多樣和資源約束嚴格而具有複雜的分佈特徵、組網靈活性和高度動態性，基于簇的網絡管理模式麵臨著如何實現針對不同的簇受損情形的高效簇維護問題。建立瞭一種可以適應不同簇維護需要的多模簇維護機製，以自適應跼域按需簇維護為目標，根據網絡中簇的動態變化時間和空間進行分類簇維護，將簇維護轉化為跼部性和事件觸髮的操作，觸髮機製包括簇頭剩餘能量低于設定閾值、簇頭負載不均、新節點加入或簇內節點失效退齣等，基于單箇簇或相鄰簇的狀態變化關繫啟動單簇（簇內）維護或多簇（簇間）維護方案。基于 NS2的倣真結果錶明：與傳統週期性、全網重新成簇的維護模式相比，該機製能夠明顯降低網絡維護開銷，有效均衡網絡節點能耗、增加傳輸的數據包總量、100％節點存活時網絡的平均生命週期最高可延長1．8倍。
무선전감망인절점음다、응용장경다양화자원약속엄격이구유복잡적분포특정、조망령활성화고도동태성，기우족적망락관리모식면림착여하실현침대불동적족수손정형적고효족유호문제。건립료일충가이괄응불동족유호수요적다모족유호궤제，이자괄응국역안수족유호위목표，근거망락중족적동태변화시간화공간진행분류족유호，장족유호전화위국부성화사건촉발적조작，촉발궤제포괄족두잉여능량저우설정역치、족두부재불균、신절점가입혹족내절점실효퇴출등，기우단개족혹상린족적상태변화관계계동단족（족내）유호혹다족（족간）유호방안。기우 NS2적방진결과표명：여전통주기성、전망중신성족적유호모식상비，해궤제능구명현강저망락유호개소，유효균형망락절점능모、증가전수적수거포총량、100％절점존활시망락적평균생명주기최고가연장1．8배。
Due to numerous nodes,diverse scenarios and limited resource,wireless sensor networks are fea-tured in complicated distribution,flexible networking and highly dynamic state,the cluster-based network man-agement is facing how to energy-efficiently maintain the structure of clusters for different situations.A multi-mode cluster maintenance mechanism is proposed to meet diverse demands of maintenance of clusters,which fo-cuses on the target of adaptive,local and on-demand maintenance of clusters,the operations of maintenance of clusters are done according to the dynamically changed network in time and space fields,it transforms the main-tenance of clusters into local and event-triggered operations,the triggers include the residual energy of cluster head lower than a set threshold,the out-of-balance loads of cluster heads,new node joining a cluster or disable nodes,etc.The program of maintenance for single cluster (inner-cluster)or multi clusters (inter-clusters)is in-itiated according to the damaged single cluster or neighboring ones.The results of simulation based on NS2 show that the proposed methods can significantly reduce cost of network maintenance,effectively balance the energy consumption among nodes,increase the sum of transmitted data and prolong lifetime of the network 1.8 times at most under 100%survived nodes compared with the traditional periodic whole-network re-clustering method.
