A CONCURRENCY-CONTROL MODEL FOR REAL-TIME DISTRIBUTED COLLABORATION

In real-time distributed collaborative applications, the major areas o f research encompass concurrency control, causal and temporal synchron ization and real-time system response. In this paper, we propose a con currency control model for real-time collaboration. The model is based on the transaction concept and resolves the issue of real-time contro l by using a distributed optimistic concurrency control protocol. It p rovides for a flexible control mechanism by incorporating user locks u sing the concept of persistent lock transactions. An implementation of this model for a collaborative image design application is also discu ssed.