Analysis of flow behavior within an integrated computer communication network

Abstract

This research concerns itself with the flow behavior in a computer-communication network that integrates data and voice classes of traffic. This behavior is analyzed as a queueing problem by modeling nodes and channels and evaluating their behavior under different arrival rates. Switching mechanisms, flow control considerations, and the development and used of simulation and analytical models are emphasized. Prominent flow control strategies are classified into a framework for potential utility as regulating controls in an integrated environment. An event-driven FORTRAN network simulator is developed based on common call management, traffic integration on trunk lines, and an underlying circuit switched communications subnet. The network simulator is a cost-effective portable tool that has application in an environment where computer resources are limited. It is sufficiently general in structure so that several design factors can be varied by the user to evaluate network performance by collecting appropriate empirical data. An algorithm is formulated that permits decomposition of the network into nodal configurations. A FORTRAM program is developed that implements this algorithm. Finally, summary information demonstrates the practicality of an integrated network and need for flow controls.