一种支持历史航迹和预查询的动目标索引方法

随着目标检测技术和传感器网络技术的发展,高效的目标信息索引方法可以提高系统性能和稳定性.因此,提出了一种动目标索引方法SSTR-tree,能将历史索引和预测索引结合,实现全时态查询,具有较高的更新、查询效率;通过设置有效时间段索引,对无效时间段内信息只记录目标突变信息,提高了动目标航迹管理的效率.通过实验证明,与传统的哈希存储和3 DR-tree索引方法相比较,SSTR-tree动目标索引方法更新和查询效率更优.

Method of Indexing Moving Objects for Historical Trace and Perspective Queries

With the improvement of target detecting and sensor network technology,an efficient target indexing method can improve the performance and stability of system.A moving target indexing method called SSTR-tree is proposed,so current and future queries are supported by SSTR-tree,with a higher efficiency in update and query.It also gains more efficiency in track management of moving targets with the method of bringing in the conception of active time.In active time period,the information of targets is recorded.Otherwise,only the mutative information of targets is recorded.Compared to the traditional methods of Hash starge and 3DR-tree index,experiments show that SSTR-tree is more efficient in query and update.