实时数据分发系统的服务质量控制的研究

Research on Quality of Service of Real-time Data Distribution System

在实时分布式系统中,采用实时发布-订阅协议的数据分发服务中间件,提供了一种以数据为中心的通信规范,定义了一个可扩展、与平台无关、与位置无关的基础服务模型。该通信模型,在空间、时间、传输、功能方面都是松散耦合的。实时数据发布者和订阅者,通过设置和调整服务质量参数,可以实现不同的数据需求和传输方式。服务质量参数可以在每个实体的基础上改变,这是每个实体支持复杂的数据通信模式配置的关键。研究表明,通过控制服务质量,数据能够以多种方式轻松地发送和接收,节点可以动态地离开和进入系统,有利于系统灵活的扩展和升级。

In real-time distributed system, data distribution service middleware using real-time publish-subscribe protocol, provides a data-centric communications specification, defines a scalable, platform-independent and position-independent basis service model. The communication model, in space, time, transmission, functions are loosely coupled. Real-time data publisher and subscriber, by setting and adjusting the quality of service parameters, can achieve different data requirements and transmission. Quality of service parameters can be changed based on each entity, it is key for each entity supported complex data communication mode configuration. The reasearch results show that, by controlling the quality of service, data can easily send and receive with a variety of ways, the node can dynamically leave and enter the system , it is beneficial to flexible expansion and upgrading to the system.