time constrained range search queries over moving objects in road networks
The development of mobile devices and mobile databases boost many spatial queries over moving objects, most of existing mobile applications concentrate on processing mobile queries based on distance metric in Cartesian space. In reality, traveling time is another important metric for spatial queries rather than Euclidean distance or network distance. On the other hand, the spatial queries of moving object monitoring is also restricted by frequent updates, as a result, processing spatial queries over moving objects becomes a tough job, especially in road networks. In this paper, we proposes a time constrained range search query and applies this query over a set of objects moving on the road networks to get a continuous result. By experimental studies, we show that our proposed approach can solve time constrained range search queries properly and the approach for moving objects monitoring outperform its competitors.
range search mobile database spatial database query processing