论文部分内容阅读
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。
A sufficient amount of distance data is needed to obtain the exact location of a node in a wireless sensor network, especially in multi-hop topologies where the quality of the data will be affected by the stability of the routing link. Usually measure the distance between nodes only for positioning. In order to increase the data integrity, the information of the distance between nodes is introduced in the link selection of multi-hop routing structure. To solve the problem of abnormal wireless communication, two kinds of communication areas are proposed: Normal communication area means the node and Other nodes in the area can communicate bidirectionally successfully; the abnormal area means that it is difficult for the node and the nodes in the area to communicate normally. Due to the instability of communications, some of the existing approaches attempt to completely circumvent non-normal communications areas. A method of virtual boundaries is proposed, assigning priority to these areas. The nodes in the normal area have the priority selected as the link vertices. If there is no link in this area, the nodes in the abnormal area will be selected according to the distance from the parent node. As a result, the multi-hop topology can be more robust, the number of isolated nodes can be reduced, the proportion of data collected by the base station can be increased, and the high-precision positioning of sensor nodes can be achieved.