为适应复杂大规模的城市交通消息管理,保证效率优势与稳定性优势,将基于语义的发布/订阅通信模型应用于交通系统的可变情报板消息管理;将来自异构数据源的粗糙数据整理成规范的RDF(Resource Description Framework)事件;将基于环境特征的可变情报板请求规范为RDF订阅。在发布订阅引擎的支持下,采用语义匹配算法,实现可变情报板的消息通知与订阅的管理,从而有效地提高了可变情报板消息的管理,保证交通信息快速准确地传递给交通信息接收者。
In order to accommodate complicated large-scale metropolitan transportation information management and ensure the predominance of efficiency and stability,in this thesis we apply the semantics-based publish/subscribe communication model to information management of variable message signs in transportation system.Raw data derived from heterogeneous data source is packed up to normative RDF(Resource Description Framework) events;requests of variable message signs based on environment characteristics is normalised to RDF subscription.With the support of publish/subscribe engine and adopting semantics-based matching algorithm,we implement the information publish/subscribe management of variable message signs,therefore the information management of variable message signs is effectively improved,which ensures quick and accurate conveying of transportation information to the information receivers.