摘要： 以发布/订阅范型在时间维度上解耦导致的不确定性为出发点，采用时序分析方法，研究范型中信息投递的可靠性保障。在定义投递信息可用性的基础上，给出保证信息向订阅者可靠投递系统应满足的基本计算条件，探讨底层通信设施对可靠性的影响。针对发布/订阅范型中信息可靠投递的问题，提出必要的计算条件。分析结果表明，信息的可靠投递与订阅活跃期、订阅延迟、发布传播延迟密切相关。

关键词: 发布/订阅范型, 可靠投递, 可信, 事件

Abstract: This paper takes the non-determinism introduced by decoupling on time dimension as starting point. Through temporal analysis method, the guarantee of the reliable delivery of information in this paradigm is surveyed. After defining the usability of delivery information, it provides the essential computational property on reliable delivery of information to subscriber. It concentrates on the effect of communications infrastructure on reliable delivery of information to subscriber, and devises an event broker which increases dependable degree in Publish/Subscribe(Pub/Sub) system. The result of analysis shows that the computational conditions are vital factors to guarantee durable resource sharing, and the reliable delivery has direct correlations to the active interval of subscription, the delay of subscription, the delay of publication diffusion.

Key words: Publish/Subscribe(Pub/Sub) paradigm, reliable delivery, dependability, event

中图分类号: 

• TP338.9