基于动态搜索区域的无线传感器网络小世界特性构建方案

为了减少无线传感器网络节点的能量消耗,以延长无线传感器网络的寿命,首先研究了如何通过在无线传感器网络中构建小世界特性以延长其网络寿命,并着重分析了DAS(directedangulation tow ards the sink)方案.然后针对DAS方案中临近sink节点区域内的节点能量过快消耗的问题,提出了一种在无线传感器网络中构建小世界特性的新方案——菱形区域方案.该方案根据sensor节点到sink节点距离的大小,动态地改变菱形捷径端点搜索区域的大小,达到构建小世界特性并增强网络抗毁性的目的.理论证明了菱形区域方案在一定条件下较DAS方案既节省能量又能延长网络的寿命.

A scheme of constructing small world network in WSNs based on dynamically searching zone

In order to reduce the energy consumption of nodes in wireless sensor network(WSN) and thus extend the lifetime of wireless sensor network,this paper first studies how to prolong the lifetime of wireless sensor network through building small-world property,and emphatically analyzes the directed angulation towards the sink(DAS) scheme.To solve the problem that the energy of nodes near sink node use up quickly when the small-world property is constructed according to the DAS scheme,the diamond zone(DZ) scheme is proposed to construct small-world network for the WSNs.The DZ scheme can dynamically change the size of the searching area of shortcuts endpoint according to the distance between the sensor node and the sink node,therefore,the scheme can not only construct the small world networks for the WSNs,but also degrade the possibility of the nodes near the sink node to be selected as short-cut endpoints,decrease the energy consumption of these nodes and strengthen the invulnerability of WSNs.Additionally,through the comparison with the DAS scheme,the DZ scheme can extend the lifetime of WSNs under certain conditions.