Traffic grooming in an optical WDM mesh network

摘要

In wavelength-division multiplexing (WDM) optical networks, thenbandwidth request of a traffic stream can be much lower than thencapacity of a lightpath. Efficiently grooming low-speed connections ontonhigh-capacity lightpaths will improve the network throughput and reducenthe network cost. In WDM/SONET ring networks, it has been shown in thenoptical network literature that by carefully grooming the low-speednconnection and using wavelength-division multiplexer (OADM) to performnthe optical bypass at intermediate nodes, electronic ADMs can be savednand network cost will be reduced. In this study, we investigate thentraffic-grooming problem in a WDM-based optical mesh topology network.nOur objective is to improve the network throughput. We study the nodenarchitecture for a WDM mesh network with traffic-grooming capability. Anmathematical formulation of the traffic-grooming problem is presented innthis study and several fast heuristics are also proposed and evaluated