一种无线传感器网络定位算法的分析和改进

Analysis and improvement for localization algorithm in wireless sensor networks

无线传感器网络(W SNs)能够实时监测和采集网络分布区域内的各种检测对象信息,有着广泛的应用前景。在W SNs中,节点定位技术是许多应用的支撑技术,定位的准确性直接关系到传感器节点采集数据的有效性。目前,已提出多种定位算法,Euc lidean算法由于通信开销小,具有一定的优越性,但在某些应用中存在定位精度较低的问题。针对这一问题,提出了一种新的改进Euc lidean的算法。用距离矢量路由技术替代直接测量节点间的距离,并运用迭代循环思想抑制定位误差的累计。计算机仿真结果证明:该改进算法能够明显地提高定位精度。

Wireless sensor networks（ WSNs）, which is utilized in a broad foregroud, is able to instantly monitor and collect various information of different objects in the network distributed area. In WSNs, sensor location plays a critical role in many application. Currently, many positioning algorithms are proposed. Euclidean has an advantage because of lower communication overhead, but high inaccuracy is compared to others. A new location algorithm is proposed to improve the inaccuracy of Euclidean. Result of the simulation shows the modified algorithm is better than the original in accuracy.