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 useda simulation tool, that we have developed and we call M_OBS_SIM(Modular OBS Simulator). The main figure of merit here investigated is the burstblocking 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 OBS core switch based on optical codes.
System Design and Evaluation of a Large Photonic Switch based onOptical Codes for Optical Burst Switched Networks / Casoni, Maurizio; A., Sacchi. - ELETTRONICO. - (2009), pp. 1-3. (Intervento presentato al convegno 2009 IEEE 3rd International Symposium on Advanced Networks and Telecommunication Systems, ANTS 2009 tenutosi a New Delhi, ind nel 14-16 December 2009) [10.1109/ANTS.2009.5409892].
System Design and Evaluation of a Large Photonic Switch based onOptical Codes for Optical Burst Switched Networks
CASONI, Maurizio;
2009
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 useda simulation tool, that we have developed and we call M_OBS_SIM(Modular OBS Simulator). The main figure of merit here investigated is the burstblocking 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 OBS core switch based on optical codes.
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