摘要
为获得无线传感网络中节点的精确位置需要足够量的距离数据,特别是在多跳拓扑结构中数据的好坏将受到路由链接稳定性的影响。通常节点间距离测量仅用于定位。为增加数据整合性,在多跳路由结构的链路选择中引入了节点间距离测量信息,为解决无线通信不正常的问题,提出了2种节点的通信区域:正常通信区域是指该节点与区域内的其他节点可以双向成功通信;非正常区域是指该节点与区域内节点很难正常通信。由于通信的不稳定性,现有的一些方法试图完全避开非正常通信区域。提出了虚拟边界的方法,给这些区域分配优先级别。正常区域内的节点有被选为链接顶点的优先权,如果这个区域内没有链接可选,非正常区域的节点将按照到母节点的距离被选择。其结果可使多跳拓扑结构更加鲁棒,减少孤立的节点数,增加基站收集数据的比例,实现传感器节点的高精度定位。
For node localization in sensor networks, sufficient information of range data is required to obtain the pre cise node position. Especially in a multihop topology model, successful data aggregation is influenced by link stabil ity of each connection of routes. In general, the internode range measurement is performed only for position determi nation purpose. This research introduces the use of internode range measurement information for link selection in a multihop route composition in order to increase the rate of data aggregation. To solve the irregularity problems of wireless media, two areas of node communication have been considered. The regular communication area is the area in which other nodes are able to perform symmetrical communication with the node without failure. The irregular area is the area in which other nodes are seldom able to communicate. Due to its instability, some existing methods try to avoid the irregular area completely. A novel method, named virtual boundaries （VBs）, is proposed to prioritize these areas. The nodes in regular communication area have high priority to be selected as link vertices; however, when there is no link candidate inside this area, nodes within the irregular area will be selected with respect to their range to the parent node. This technique results in a more robust multihop topology that can reduce isolated node numbers and increase the percentage of data collected by the base station accordingly. These results lead to high pre cision localization of sensor nodes in sensor networks.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2012年第8期1697-1707,共11页
Chinese Journal of Scientific Instrument
关键词
传感网络
测距定位
多跳通信
sensor networks
range-based localization
multi-hop communication
