3rd International ICST Conference on Broadband Communications, Networks, and Systems

Research Article

Physical Topology Design for All-Optical Networks

  • @INPROCEEDINGS{10.1109/BROADNETS.2006.4374395,
        author={Huan Liu and Fouad A. Tobagi},
        title={Physical Topology Design for All-Optical Networks},
        proceedings={3rd International ICST Conference on Broadband Communications, Networks, and Systems},
        publisher={IEEE},
        proceedings_a={BROADNETS},
        year={2006},
        month={10},
        keywords={},
        doi={10.1109/BROADNETS.2006.4374395}
    }
    
  • Huan Liu
    Fouad A. Tobagi
    Year: 2006
    Physical Topology Design for All-Optical Networks
    BROADNETS
    IEEE
    DOI: 10.1109/BROADNETS.2006.4374395
Huan Liu1,*, Fouad A. Tobagi1,*
  • 1: Department of Electrical Engineering, Stanford University
*Contact email: huanliu@stanford.edu, tobagi@stanford.edu

Abstract

There are many advantages of deploying an all- optical network. Unfortunately, there are still few guidelines on how to properly design the physical topology for such a network. We propose an efficient physical topology design algorithm and we use the asymptotic growth rate of the provisioned capacity as a metric to compare various design alternatives. A higher asymptotic growth rate translates directly into higher deployment cost for large networks. Our study shows that taking fiber length into consideration can lead to lower capacity requirement. We also find that a sufficiently large fiber-to-node ratio is necessary in order to minimize the asymptotic growth in the provisioned capacity, increase capacity utilization and minimize the need for wavelength conversion. We study a real network and find that its fiber-to-node ratio is too low. As a result, large provisioned capacity is required and less than 55% of the capacity is usable. By increasing the ratio, we can reduce the provisioned capacity and achieve close to 80% utilization.