Symbian OS下的实时交通导航系统

Real-time Traffic Navigation System in Symbian Operating System

为了设计和实现Symbian操作系统下的实时交通导航系统,研究了基于Hilbert分形和最小边界矩形分解的改进R树空间索引结构,提高了空间对象检索效率.利用Symbian的活动对象机制构建了单线程的非抢占式多任务处理方法,保证了系统的运行安全性和效率.基于Symbian Open C技术构建的矢量地图解析引擎具有跨平台特性.基于系统设计和实现方面的关键问题研究,实现了Symbian S60平台下的实时交通导航系统.在多个城市的测试结果表明,该系统的稳定性和实时性均能够满足实用化要求.

To design and develop the real-time traffic navigation system（RTTNS） in Symbian operating system（OS）,several key technologies were studied.The R-tree spatial index structure was improved based on Hilbert fractal and minimum boundary rectangle（MBR） decomposion.Active object was utilized to deal with non-preemptive multitasking in Symbian OS.A portable vector map library was designed with ＂Open C＂ technology.A RTTNS was developed in Symbian S60 OS.The experiment results of several cities show that the RTTNS is highly stable and effective.