【作者】 许立波；

【导师】 卢章平；

【作者基本信息】 江苏大学 ， 机械设计及理论， 2003， 硕士

【摘要】 过去几年里，网络通信技术和计算机技术得到了迅速发展，单机间通信也随之发展成为分布式通信，这成为网络化制造支撑网络的基础。但随着制造网络规模的扩大，分布式事务的复杂，人们对系统的可靠性，通信效率，成本控制以及信息集成度提出了更高的要求，这促使了对分布式异步通信的深入研究。这些研究从早期的非阻塞通信到扩展异步RPC再到移动Agent应用，分布式异步通信经历了逐步走向完善的演化过程。尽管如此，这种新的分布式通信模式在预制基础，协作运行以及容错通信等方面存在诸多不足，成为制造网络进一步发展的阻碍。本文试图对这些问题作出一些有益的探究，在剖析了异步通信的内核演进机制后，提出并阐述了在COM+基础上构建移动Agent应用的思想，利用COM+面向对象特性和其运行环境作为预制基础，为移动Agent提供有力的平台支持；针对Agent协作问题，提出了Agent关联组，嵌套组及组协作模式等理论来描述和定义Agent组的组织结构和行为特征；针对原有通信容错手段的单一和呆板，提出了树型动态容错结构，多Agent请求多代理和Agent组协作容错等理论，并对移动环境下的容错技术作了初步阐述，最后以一个原型系统对部分所述理论进行了验证。更多还原

【Abstract】 In the last few years, communication technology and computing technology are both developing rapidly. So interprocessor communication develops to distributed communication. That builds the base of support network for network manufacturing. But when manufacturing network system extends and distributed transaction become complex, system reliability, communication efficiency, cost control and information integration are highly demanded. That propels deep research for distributed asynchronous communication. These researches develop from early unblocking communication to upgrade asynchronous RFC, then to mobile agent applications. Distributed asynchronous communication also gradually experiences process to perfect form. But the new communication model has several defects on prefabricate base, cooperative work and fault-tolerant communication, forming obstruct for manufacturing network’s further development. The paper tries to explore these problems. After anatomizing the development of asynchronous communication’s kernel, the paper advances a new thought of building mobile agent applications on COM+. The powerful supports are offered to mobile agent by COM+’s prefabricate base for its OOP and its environment. Then aiming at cooperative agent problems, agent associate group, nested group and cooperative group model are brought to describe the structure and action of agent group. The dynamic tree-type fault-tolerant structure, multi-agent claiming multi-substitute model and fault-tolerant agent group are brought to resolve singleness and stiffness of old fault-tolerant measures. At last, some showed theories are proved in a prototype system gived.更多还原