Abstract
This paper introduces a VC management scheme to be used in switch-routers (SRs), which ale switches capable of using VCs to route IP traffic. Using the fact that VCs can be re-used by subsequent flows before signalling closes it, we determine the VC pool size (i.e., the number of VCs to keep open locally), In the STATIC VC pool scheme, N-max VCs are opened at boot time, after which no more VCs are opened or closed. We show how to find N-max, and the optimal cost.
In the DYNAMIC case, we propose that blocks of VCs be added and removed from the pool on demand. We derive closed-form solutions for the size of the blocks and show how to compute the (minimum) total cost. A markov model is presented for both when signalling is instantaneous and when it takes constant time. Simulation results validate our model.