关键词: 无线传感器网络, 定位技术, DV-Hop算法, 算法优化

Abstract: Because in the wireless sensor network location technology DV-HOP algorithm is put in bigger error, in order to improve the accuracy of its positioning, this paper proposes a DDV-Hop algorithm to the traditional DV-Hop algorithm to the unknown node location is optimized in two ways. One hand, when beacon nodes per jump distance is estimated, the concept of minimum hop count deviation is presented, error analysis and correction of the distance is given. On the other hand, the beacon nodes are located themselves to get position coordinates of the unknown node location error. The simulation results show that the optimized algorithm improves the precision of the positioning, the positioning error is reduced about 8%~12%.

Key words: wireless sensor network, positioning technology, DV-Hop algorithm, optimization algorithm