TRADEOFF STUDY OF SWITCHING SYSTEMS.

This paper is concerned with a comparison study of three switching techniques used in computer-based communication networks: circuit switching, message (packet) switching, and ″cut-through″ switching. Our comparison is based on the delay performance as obtained through analytic models of these techniques. For circuit switching the model reflects the phenomenon of channel reservation through which it can be shown that when circuit switching is used, data communication networks saturate rapidly. Through numerical examples it is shown that the boundary between the areas of relative effectiveness of these switching techniques depends very much on the network topology, (more precisely, the path length of communication), the message length, and the useful utilization.