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Proceedings Paper

Traffic shaping and scheduling for OBS-based IP/WDM backbones
Author(s): Mahmoud S. Elhaddad; Rami G. Melhem; Taieb Znati; Debashis Basak
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Paper Abstract

We introduce Proactive Reservation-based Switching (PRS) -- a switching architecture for IP/WDM networks based on Labeled Optical Burst Switching. PRS achieves packet delay and loss performance comparable to that of packet-switched networks, without requiring large buffering capacity, or burst scheduling across a large number of wavelengths at the core routers. PRS combines proactive channel reservation with periodic shaping of ingress-egress traffic aggregates to hide the offset latency and approximate the utilization/buffering characteristics of discrete-time queues with periodic arrival streams. A channel scheduling algorithm imposes constraints on burst departure times to ensure efficient utilization of wavelength channels and to maintain the distance between consecutive bursts through the network. Results obtained from simulation using TCP traffic over carefully designed topologies indicate that PRS consistently achieves channel utilization above 90% with modest buffering requirements.

Paper Details

Date Published: 1 October 2003
PDF: 12 pages
Proc. SPIE 5285, OptiComm 2003: Optical Networking and Communications, (1 October 2003); doi: 10.1117/12.533541
Show Author Affiliations
Mahmoud S. Elhaddad, Univ. of Pittsburgh (United States)
Rami G. Melhem, Univ. of Pittsburgh (United States)
Taieb Znati, Univ. of Pittsburgh (United States)
Debashis Basak, Univ. of Pittsburgh (United States)

Published in SPIE Proceedings Vol. 5285:
OptiComm 2003: Optical Networking and Communications
Arun K. Somani; Zhensheng Zhang, Editor(s)

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