Location in distributed ad-hoc wireless sensor networks
Location in distributed ad-hoc wireless sensor networks
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DOI：
10.1109/icassp.2001.940391
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发表时间：
2001-05
期刊：
影响因子：
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通讯作者：
Chris Savarese;J. Rabaey;J. Beutel
中科院分区：
文献类型：
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作者：
Chris Savarese;J. Rabaey;J. Beutel
不断发展的自组织无线传感节点网络在很大程度上依赖于建立位置信息的能力。本文提出的算法依赖于节点对之间的距离测量和稀疏定位的锚节点的先验坐标。锚节点周围的节点簇通过假设、检查和迭代细化协作建立可靠的位置估计。一旦建立，这些位置就会传播到更远的节点，从而使整个网络能够创建自己的准确地图。主要障碍包括克服范围测量中高达 /spl plusmn/50% 的误差，以及对具有很少或没有锚节点的集群中的节点位置进行初始猜测。使用位置误差作为主要指标，提出并讨论了这些问题的解决方案。根据位置误差、可扩展性以及通信和计算要求对算法进行比较。在存在范围和初始位置不准确的情况下，早期模拟产生的平均位置误差为 5%。
Evolving networks of ad-hoc wireless sensing nodes rely heavily on the ability to establish position information. The algorithms presented herein rely on range measurements between pairs of nodes and the a priori coordinates of sparsely located anchor nodes. Clusters of nodes surrounding anchor nodes cooperatively establish confident position estimates through assumptions, checks, and iterative refinements. Once established, these positions are propagated to more distant nodes, allowing the entire network to create an accurate map of itself. Major obstacles include overcoming inaccuracies in range measurements as great as /spl plusmn/50%, as well as the development of initial guesses for node locations in clusters with few or no anchor nodes. Solutions to these problems are presented and discussed, using position error as the primary metric. Algorithms are compared according to position error, scalability, and communication and computational requirements. Early simulations yield average position errors of 5% in the presence of both range and initial position inaccuracies.