一种基于分层道路网的数据准备模型及实现

Data preparation model based on hierarchical road network and its implementation

为了缩短计算中心与车辆之间的数据传送时间,提出并实现了一种TMSCR数据准备模型,即在包含起止点的一个网格集合的外接矩形区域中,提取起点网格内的低层路段、终点网格内的低层路段和所有高层路段的并集,发送给车辆。实验表明,实现该模型的时间代价很小,TMSCR模型与传统的方法相比,可以大大节省通信时间,从而为车辆导航提供优质的服务。

To reduce the communication time, we proposed a data preparation model named transportation meshes set circum-rectangle（ TMSCR）. This modal stated that traffic center should send a special data set to vehicles, which consisted of the low level road segments in O-grid and D-grid as well as high level road segments in the circum-rectangle of meshes set which contained O-node and D-node. Experiments indicate that the implementation process is much more efficient in a personal computer. The model will greatly contribute to time savings in the communication between traffic center and vehicles so that provide better service level to vehicles compared with traditional method.