摘要：

基于OMG组织颁布的实时系统中数据分发服务最新标准设计了一个新的发布/订阅中间件，实现了分布式环境中以数据为中心的数据实时传输，解决了分布式实时系统中服务质量约束和单点失效等问题。提出一种全局数据空间管理策略，解决了通信节点动态增删问题。该模型与CORBA规范和其他发布/订阅模型相比，具有较好的灵活性、实时性、可扩展性和可靠性。

关键词: 发布/订阅, 中间件, 数据分发服务, 服务质量

Abstract: This paper designs a new publish/subscribe middleware based on data distribution service(DDS), which is published by OMG. Data centric-data real-time transferring in distributed environment is realized, and QoS restriction and a single point of failure are solved. Dynamical adding and deleting of communication nodes are realized by managing global data space in a special way. Compared with CORBA and other publish/subscribe models, this middleware is more flexible, realtime, scalable and reliable.

Key words: publish/subscribe, middleware, data distribution service(DDS), QoS

中图分类号: 

• TP311