基于OpenDDS和反射内存卡的信息分发技术

Information Distribution Technology Based on OpenDDS and Reflective Memory

摘要:

随着军事领域中信息化系统的应用，信息网络中对信息分发的实时性要求越来越高。信息分发的实时性取决于通信模型、信息分发的策略和网络本身的物理特性。开源数据分发服务 (Open Data Distribution Service，OpenDDS)采用以数据为中心的发布订阅通信模型，为很多信息分发网络的实时数据通信提供了较好的解决方案。反射内存卡作为通信介质，其存储共享和快速读写模式可以减少网络损耗，提高传输效率。将反射内存卡与OpenDDS结合设计信息分发模型，介绍了OpenDDS架构、OpenDDS网络通信原理、和基于UDP的对象请求代理间协议 (Datagram Inter-ORB Protocol，DIOP)。通过研究DIOP下的远程调用通信流程、反射内存卡读写数据和自适配通信环境反应器 (Adaptive Communication Environment Reactor ，ACE Reactor)监控硬件以及多路分离通知机制，使用反射内存卡作为底层通信介质，通过反射内存卡组网的硬件设计和OpenDDS的软件设计，实现了在DIOP协议上，将通信数据通过反射内存卡传输,提出了一种基于OpenDDS通信模型和反射内存卡的信息分发技术。最后通过实验验证传输数据的正确性。

Abstract:

With the application of information system in military field,information network requires better and better real-time information distribution.The real-time performance of information distribution depends on the communication model, the strategy of information distribution and the physical characteristics of the network itself. Open Data Distribution Service(OpenDDS) adopts a data-centric publish-subscribe communication model, which provides a better solution for real-time data communication in many information distribution networks. As a communication media, reflective memory’s storage and fast read-write mode can reduce network loss and improve transmission efficiency. Information distribution model is designed by combining reflective memory with OpenDDS and OpenDDS architecture , OpenDDS network communication and Datagram Inter-ORB Protocol(DIOP) are introduced. By studying the remote call communication process under DIOP, refective memory reading –writing data method and the monitoring hardware and multi-channel separation notification mechanism of Adaptive Communication Environment Reactor(ACE), using refective memory as the underlying communication media, the communication data is transmitted through reflective memory and DIOP by reflective memory network hardware design and OpenDDS software design. An information distribution technology based on reflective memory and OpenDDS communication model is proposed. Finally,the correctness of data transmission is verified by experiment.