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�������պ����ѧѧ�� 2010, Vol. 36 Issue (2) :206-209    DOI:
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���»�1, �Ͻ�ƽ1, �� ��2*
1. ɽ����ѧ ��Ϣ��ѧ�빤��ѧԺ, ���� 250100;

2. �������պ����ѧ ������Ϣ����ѧԺ, ���� 100191
Distributed range-free localization algorithm in wireless sensor networks for 3D space
Wang Dehua1, Xing Jianping1, Zhang Jun2*
1. School of Information Science and Engineering, Shandong University, Jinan 250100, China;
2. School of Electronics and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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Abstract�� To solve the node localization problem for wireless sensor networks deployed in stereoscopic environments, a novel three-dimensional distributed range-free localization algorithm (3D-DRL) was proposed. Based on the grid-based representation and after voting for each cubic cell, 3D-DRL assumed the centroid of cells with highest votes as the estimated location of that unknown node. The scheme avoids the interaction between unknown nodes, costs lower communication overhead, is independent of the anchor node density and robust to the network topology. Simulation results under ideal radio propagation model indicate that the average localization error is 8% when all nodes are randomly deployed in 100�[m×100�[m×100�[m scenarios with 50�[m communication range of the unknown node. Especially, all unknown nodes can localize themselves by increasing ��V��ANR.
Keywords�� wireless sensor networks   three-dimensional   range-free localization   distributed   grid-based representation     
Received 2009-01-09;

������Ȼ��ѧ�����ص�������Ŀ(10377005); ɽ��ʡ��Ȼ��ѧ����������Ŀ(Y2007G10)

About author: ���»�(1982-),��,ɽ��������,˶ʿ��,wdh200711564@yahoo.cn.
���»�, �Ͻ�ƽ, �� ��.���ߴ������ķֲ�ʽ�Dz����ά��λ�㷨[J]  �������պ����ѧѧ��, 2010,V36(2): 206-209
Wang Dehua, Xing Jianping, Zhang Jun.Distributed range-free localization algorithm in wireless sensor networks for 3D space[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2010,V36(2): 206-209
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