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�������պ����ѧѧ�� 2008, Vol. 34 Issue (06) :647-651    DOI:
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Three-dimensional self-localization scheme for wireless sensor networks
Liu Yuheng, Pu Juhua, He Yang, Xiong Zhang*
School of Computer Science and Technology, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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ժҪ ��Բ�������ά�ռ�����ߴ���������,�����һ�ִ������ڵ�����λ����APIT-3D(Approximate Point-In-Tetrahedron),ͨ���жϴ������ڵ��Ƿ�λ����ê�ڵ���ɵ���������ڲ�,ɸѡ�����ܵ�λ������,�����ռ�����Щ���򽻼����ֵ�����,��Ϊ����λ�ڵ��λ��.����ʵ�����,��Ϊһ�ֲ����ڲ����豸�Ķ�λ����,APIT-3D���Դﵽ�ڵ�ͨ�Ű뾶��40%���µĽϸ߾��ȵ���ά��λ,����ͨ�ſ�������ڶ�ά��λ��������������.APIT-3D��λ�������踴�ӵIJ���豸�Ͱ�����ⲿ��ʩ,��ͨ��Э����Լ�,�����һ�ֵͳɱ����͹��ĵ����ߴ�����������ά����λ����.
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Abstract�� A novel three-dimensional (3D) self-localization scheme APIT-3D (approximate point-in-te-trahedron) was presented for wireless sensor networks (WSNs). The target sensor performed APIT-3D test to judge whether it resided inside or outside of tetrahedrons, which narrowed down the possible location areas (PLA). Then, APIT-3D averaged the centers of gravity (COG) of the intersection of PLA as the unknown sensor-s estimated location. Simulation results indicate that, as a range-free scheme, APIT-3D can achieve location accuracy within 40% of radio range, while the communication cost remains reasonable comparing with its 2D counterpart. Since APIT-3D depends on no ranging measures or global infrastructure, it presents a low-cost solution for self-localization of densely deployed and large scale WSNs in 3D spaces.
Keywords�� wireless sensor networks   self-localization schemes   three-dimensional space     
Received 2007-06-15;

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About author: �����(1980-),��,ɽ��������,��ʿ��,hengly@cse.buaa.edu.cn.
�����, �Ѿջ�, ����, ���.���ߴ�����������ά����λ����[J]  �������պ����ѧѧ��, 2008,V34(06): 647-651
Liu Yuheng, Pu Juhua, He Yang, Xiong Zhang.Three-dimensional self-localization scheme for wireless sensor networks[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2008,V34(06): 647-651
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