An application of object-oriented design for communication control systems

The authors present what is believed to be the first concrete object-oriented design (OOD) of a practical communication control system. First, all terms which are needed to describe target system behavior are unified by all designers, and listed. Next, objects are made from the term list, and operations found in target system behavior are added to the objects. The behavior of the target system is described by the objects. Finally, implementation modules are made from objects. The resulting OOD program is compared with a traditional functional decomposition design method program, and it shows an increase in extensibility and reliability, and a decrease in complexity