A flexible approach for extension of communication protocols

Users of computer communication systems and their requirements are rapidly increasing and changing. In order to deal such a situation a rapid development method of communication systems is necessary. One of the such development methods is to change an existing specification of the system to obtain the desired specification of the system. However, a very little work has been done to support making changes in formal specifications. In this paper, we propose a mechanism for making changes in formal protocol specifications by adding protocol functions in an existing protocol specification