关键词: 协同设计, 并发控制, 模糊计算, 优先权限

Abstract: To resolve the problems of deadlock, frequent abortion and frequent restarting in traditional concurrency control, the characters of collaborative design based on network were analyzed and a prototype system of real-time updating concurrency control was proposed. The system created the replication operation according to required data. So, after the operation was modified, the other sites could show and abstract the real-time data and solid models. The Fuzzy Logics was utilized to priority assignment of transactions, which ensured the high concurrence ratio for collaborative clients. An Object-oriented Priority-based Optimistic Concurrency Control Protocol in real-time Replication structure (OPOCCPR) was developed. The protocol ensured the multi-copy of the same object at different sites to have the consistency of replication result, when these sites just had the single access course. Every time, the replication of object just copied the part modified, not the whole object, which reduced the loads of network.

Key words: collaborative design, concurrency control, fuzzy logics, priority