Formalization of Organization of Signaling Protocol While Making Online Calls Using Automata Theory

This article describes the formalization of the signal protocol for the organization of audio and video calls via the Internet using the automata theory; the elements of the theory demonstrate the work of this protocol more clearly. Now, the Internet is an integral part of everyday life and messaging apps allow making audio and video calls. The signal protocol is the most important part in organization of such interaction and allows making a connection between users. Therefore, its formalization is actual for nowadays. The interpretation of this protocol on the non-deterministic event-driven automata allows to show its organization, all factors and problems which could be faced by developer more clearly.