Abstract
The paper describes an adaptation of the ‘rax’ protocol for concurrency control in distributed multiservice telecommunication systems. This adaptation has been developed on a prototype distributed database management system (DBMS) implemented at CNET on a version of the Sabrina centralized DBMS. The adaptation consists of the transposition of the rax protocol into a multisite architecture, namely, one operation and maintenance site and several real-time sites, and the implementation of particular techniques for control of concurrent access by two types of transactions, namely, real-time transactions and management transactions.
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