改进生物地理学优化算法的无线传感器节点定位

Node Localization Based on DV-Hop Optimizing by Improved Biogeography-based Optimization Algorithm

节点定位是无线传感器网络的应用基础,针对DV-Hop算法定位误差的缺陷和提高节点的定位精度,提出一种生物地理学优化算法的无线传感器节点定位方法。首先,对标准生物地理学优化算法进行改进,提高其全局搜索能力,然后,利用改进生物地理学代替DV-Hop算法第三阶段的最小二乘算法,对节点定位结果进行优化,最后,在Matlab 2012平台上对算法的定位性能进行仿真分析。仿真结果表明,相对于DV-Hop算法,其算法提高了节点的定位精度,大幅度降低了节点的定位误差,具有更高的实际应用价值。

Node localization is a basic application of wireless sensor network. Aiming at the defects of DV-Hop algorithm of posi tioning error and the improvements of node positioning accuracy, this paper proposes a node localization algorithm of wireless sensor with biogeography-based optimization. Firstly, the standard biogeography-based optimization algorithm is improved to obtain a better ability to do global search, and then replace the less squares algorithm in the third step of DV-Hop with the improved biogeography-based optimization to improve the results of node localization. Finally, simulate and analyze the localization performance of this algorithm on the Matlab 2012 platform. The simulation results show that, compared with DV-Hop algorithm, the proposed algorithm improves the localization accuracy of nodes and reduces the positioning error greatly. It has higher value for practical application.