关键词: 三维DV-Hop, 山头地形, 无线传感器网络, 椭圆抛物面

Abstract: The use of the classic 3D DV-Hop algorithm in hill-top topography can trigger huge positioning error and cannot meet the demand of practical application. In this paper, based on hill-top topography, an improved localization scheme for Wireless Sensor Network in 3D is put forward. This method is first to employ 3D DV-Hop algorithm to work out the node initial position, then it corrects the location by projecting this initial position to the hill-top surface. After simulation experiment by replacing hill-top topography with elliptic paraboloid, it suggests that the improved algorithm has smaller node positioning error and higher precision, which shows a good application prospect.

Key words: 3D DV-Hop, hill-top topography, Wireless Sensor Network（WSN）, elliptic paraboloid