无线传感网中瓶颈节点的局部探测及其关键性的量化

Local Detection and Criticality Quantification of Bottleneck Nodes in Wireless Sensor Network

在传感网中,大多数节点并不知道它们的位置信息。经过随机部署,一些节点会成为连接两片连通区域的关键节点,它们的移除会造成网络的割裂。大多数路由协议都是根据节点的剩余能量来判断其是否为瓶颈节点,节点在知道自己是瓶颈节点前会消耗掉相当大的一部分能量。本文提出了一种瓶颈节点的探测方法,在网络节点部署完成后立即使用,能节省那些瓶颈节点的能量,从而延长网络的生存期。同时,这种方法还能对网络中节点的关键性进行量化。

Nodes work without knowledge of their position in the network. After random deployment of nodes, some of the nodes are in critical position as they connect one group of sensor nodes to another. If these nodes are removed from the network it may lead to parti- tioning of network. Most of the routing protocols identify a node as a bottleneck node depending upon residual energy of the node. The nodes consume considerable amount of energy before they identify themselves as bottleneck nodes. An alternative method is proposed to detect bottleneck nodes in the network just after their deployment, so energy may be saved in these bottleneck nodes to lengthen lifetime of a wireless sensor network. This method also quantifies criticality of the nodes in the network.