Enhanced Optimal and Heuristic Solutions of the Routing Problem in Light-Trail Networks

Enhanced Optimal and Heuristic Solutions of the Routing Problem in Light-Trail Networks Light-trail is an efficient and feasible technology for IP transport over all-optical networks. The proposition of light-trails for all-optical networks has demonstrated a number of advantages over other paradigms such as Wavelength Routing (WR), Optical Burst Switching (OBS) and Optical Packet Switching (OPS). This article tackles the routing problem of light-trails with the solution objective of minimizing the number of needed light-trails to accommodate an offered traffic matrix. We present two enhancements to the Integer Linear Programming (ILP) formulation of the routing problem. We also propose a computationally efficient routing heuristic for use with static and incremental traffic models. The heuristic is based on routing flows one-by-one. This is done by assigning a set of attributes to each flow and to each network path. The flow attributes are used to determine the order in which flows are presented to the routing algorithm. The path attributes are used to determine which path is selected to route the flow at hand. The efficiency of the proposed heuristic is confirmed using example problems of different network topologies. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Photonic Network Communications Springer Journals

Enhanced Optimal and Heuristic Solutions of the Routing Problem in Light-Trail Networks

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Publisher
Springer Journals
Copyright
Copyright © 2007 by Springer Science+Business Media, LLC
Subject
Computer Science; Computer Communication Networks; Electrical Engineering; Characterization and Evaluation of Materials
ISSN
1387-974X
eISSN
1572-8188
D.O.I.
10.1007/s11107-007-0080-3
Publisher site
See Article on Publisher Site

Abstract

Light-trail is an efficient and feasible technology for IP transport over all-optical networks. The proposition of light-trails for all-optical networks has demonstrated a number of advantages over other paradigms such as Wavelength Routing (WR), Optical Burst Switching (OBS) and Optical Packet Switching (OPS). This article tackles the routing problem of light-trails with the solution objective of minimizing the number of needed light-trails to accommodate an offered traffic matrix. We present two enhancements to the Integer Linear Programming (ILP) formulation of the routing problem. We also propose a computationally efficient routing heuristic for use with static and incremental traffic models. The heuristic is based on routing flows one-by-one. This is done by assigning a set of attributes to each flow and to each network path. The flow attributes are used to determine the order in which flows are presented to the routing algorithm. The path attributes are used to determine which path is selected to route the flow at hand. The efficiency of the proposed heuristic is confirmed using example problems of different network topologies.

Journal

Photonic Network CommunicationsSpringer Journals

Published: Sep 1, 2007

References

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