A Novel Cost-Efficient On-Line Intermediate Waveband-Switching Scheme in WDM Mesh Networks

Authors

Mengke Li, University of Nebraska-Lincoln
Wang Yao, University of Nebraska-Lincoln
Byrav Ramamurthy, University of Nebraska-LincolnFollow

Date of this Version

2005

Comments

Published in IEEE Global Telecommunications Conference, 2005. GLOBECOM '05. Copyright 2005 IEEE. Used by permission.

Abstract

Waveband switching (WBS) is an important technique to save switching and transmission cost in wavelength -division multiplexed (WDM) optical networks. A cost-efficient WBS scheme would enable network carriers to increase the network throughput (revenue) while achieving significant cost savings. We identify the critical factors that determine the WBS network throughput and switching cost and propose a novel intermediate waveband switching (IT-WBS) algorithm, called the minimizing-weighted-cost (MWC) algorithm. The MWC algorithm defines a cost for each candidate route of a call. By selecting the route with the smallest weighted cost, MWC balances between minimizing the call blocking probability and minimizing the network switching cost. Our simulations show that MWC outperforms other wavelength/waveband switching algorithms and can enhance the network throughput at a reduced cost.