Study On Distributed Asynchronous Communication For Network Manufacturing

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.