Cut-Through Optimization with Migration Using N-by-M Circuit Switchboard

The focus in recent literature has shifted to the fact that performance of bulk transfer can reach its upper physical limit when the cut-through mode is provided for all hops on an end-to-end path. Flows in cut-through mode can enjoy all the benefits of circuit switching without having to enforce the switching technique at physical layer. This paper introduces a new angle at the problem by focusing only on the input ports to the switching matrix - referred to as the switchboard in this paper. The proposed Switchboard method models multi-port physical connectivity between two locations as an N-by-M switching matrix where N is the number of physical ports and M is the number of slots contending for access to each port in N. When formulating the problem, this paper allows for and specifically focuses on migration of slots within the matrix, where performance results prove that this feature has positive effect.