Tri-dimensional node positioning method and system based on sphere
Title：
Tri-dimensional node positioning method and system based on sphere
Application Number：
 200710122464
Application Date：
 2007/09/26
Announcement Date：
 2008/02/20
Pub. Date：
Publication Number：
 101126805
Announcement Number：
Grant Date：
Granted Pub. Date：
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 G01S 5/02
Applicant(s)：
 Tsinghua University
Inventor(s)：
 Dai Guilan, Zhao Chongchong, Qiu Yan
Key Words：
 Tri-dimensional node, positioning, sphere
Abstract：
 The utility model discloses a sphere-based three-dimensional node positioning method and system, which belongs to technical field of wireless sensor network application. The method comprises: beacon information are periodically broadcasted by an anchor node during moving process; an unknown node receives the beacon information and checks whether or not the beacon information sent by the anchor node has been received. If the information has been received, the unknown node looks for the beacon information entry corresponding to the anchor node in the beacon information chain list and check whether the information is out of date. And if the information is expired, the unknown node renews the position information in the beacon information entry and sets the beacon point ID bit as 1. The unknown node then takes the beacon information entry of ID bit 1 as the new beacon point; and selects any four effective beacon points from all beacon points to calculate the position information of the node. The system comprises: an anchor node device and an unknown node device. The spatial positioning problem of wireless sensor network nodes is effectively solved by the method in the utility model.
Claim：
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PCT：
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