交通网格的研究与应用

Research and Application of Traffic Grid

交通网格将网格技术应用于智能交通系统 ,以满足资源共享与协同操作两方面的应用需求 首先提出并构建了一个分层的、以“服务”为中心的交通网格体系结构 ,包括资源服务层、基础服务层、领域服务层与应用服务层 ;然后给出了交通网格实施的 3个抽象层次 :信息集成、功能封装与应用开发 ,并且基于OGSA ,采用请求 /应答与订阅 /通知两种方式进行了实现和相应的性能测试 ;最后给出了一个交通网格的应用实例 。

Based on grid technology, a novel road traffic infrastructure referred to as traffic grid is proposed to meet the resource sharing and coordinated use requirements for intelligent traffic system (ITS) development and deployment.The service-oriented and layered system architecture of traffic grid is presented, which divides the whole system into 4 layers: resource services layer, basic services layer, domain services layer, and application services layer.Next, the 3 different abstract levels for traffic grid implementation—information fusion, function encapsulation and application integration—are discussed.Meanwhile, based on OGSA, two different programming modes—request/response mode and subscribe/notify mode—are presented and evaluated with real traffic data respectively.Finally, an example application is given to illustrate how the traffic grid works.