Performance evaluation of OTDM/WDM networks in dynamic traffic scenario

In this paper we propose a new solution for the Routing, Wavelength and Time-Slot Assignment (RWTA) problem in a dynamic scenario. The novel aspect of this paper is that we consider nodes performing Time-slot Add-Drop directly in optical domain. The Add-Drop capabilities allow for a better network utilization in terms of blocking probability. In particular we define two heuristics, the Add-Drop static and the Add-Drop adaptive, able to exploit Add-Drop capabilities when a new connection request arrives. We compare our solution with the classical Super-Lightpath one, where Optical Time Division Multiplexing (OTDM) is not performed, proving that both the Add-Drop heuristics have always better performance.