Wide-sense nonblocking and blocking converting-space-converting switching node architecture under XsVarSLOT algorithm

Abstract

In this study, we evaluate the operation of the Converting-Space-Converting switching fabric architecture. The investigated switching fabric is suitable for all kinds of slot-operating switches, no matters the slots are wavelengths, time, or others. The switching fabric is evaluated in terms of the number of slots in the interstage links and the blocking probability. In the evaluation process, we used the proposed class of routing algorithms based on the functional decomposition of slots into subsets. The routing algorithm decomposes the slots in the interstage links into X subsets. The number of slots in each subset is evaluated by simulation, in order to obtain a blocking probability at the value of about 10−8, and analytically, in case the blocking probability is reduced to 0. The proposed algorithm can reduce the required number of slots in the interstage links by almost 84% in the nonblocking switching fabrics. However; when the blocking is acceptable, the proposed routing algorithm can also reduce this number of slots, but only when the values of blocking probability are very low.