数据分发服务在分布式嵌入式系统中的研究与设计

The Study and Design of Data Distribution Service in Distributed and Embedded Systems

分布式系统越来越广泛地应用于嵌入式设备,尤其是在航空航天事业、交通控制等方面。而这些应用场合嵌入式系统的体系结构呈现以网络为中心的趋势,这便对通信的实时性、动态灵活性提出更高要求,同时要求分布式嵌入式系统各参与者之间采用一种具有松散耦合特性和灵活的通信模式和交互机制。针对此问题,介绍RTI公司推出的一套支持出版/订阅设计思想的应用程序接口;同时设计并搭建了一个解决此分布异构问题的平台,该平台为应用程序设计人员提供了一个更高层次的设计空间,允许应用程序的程序员通过即插即用组件的方式编程完成各个参与者相互间的通讯;而且整个系统的设计更满足高效和实时性的要求。

Distributed Systems are more widely applied in embedded devices,especially in the areas of aviation and aerospace industry,or traffic controlling system.With the more network connection trend of the embedded system architecture, it needs more real-time and flexible communication capability but with loosecoupling interaction mechanism amongst sub-systems in the Distributed Embedded systems.In this paper,the author designs and constructs a developing platform for distributed-heterogeneous system based on the RTI API package.The platform provides application programmer with a higher level in design,and helps to implementing communicate among sub-systems by way of plug and play technique.The design could meet the system efficiency and real-time requirements quite well.