System design and evaluation of a large photonic switch based on optical codes for optical burst switched networks

  • Authors:

  • Maurizio Casoni;Alessio Sacchi

  • Affiliations:

  • Dept. of Information Engineering, University of Modena and Reggio Emilia, Modena, Italy;Dept. of Information Engineering, University of Modena and Reggio Emilia, Modena, Italy

  • Venue:
  • ANTS'09 Proceedings of the 3rd international conference on Advanced networks and telecommunication systems
  • Year:
  • 2009

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Abstract

This paper investigates the performance of a multi-stage Clos architecture having a bufferless switch based on optical codes as basic switching element. This multi-stage switch is suitable as core node in OBS networks. Optical codes are used for coding incoming bursts in each switching element to perform the switching function. To this end it employs encoders and decoders and possible output contentions are solved in the wavelength domain by means of variable-input fixed-output wavelength converters.A core node with this multi-stage architecture is compared with a monolithic single-stage switch, with the goal to evaluate the performance feasibility of a large Terabit optical switch. In order to study the performance of this switch architecture, we have used a simulation tool, that we have developed and we call M_ODS_SIM (Modular ODS Simulator). The main figure of merit here investigated is the burst blocking probability as a function of different load conditions and switch size.The main result is that a 3-stage Clos architecture can be used for the realization of a Terabit ODS core switch based on optical codes.