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- Publisher
- Springer Journals
- Copyright
- Copyright © 2001 by Kluwer Academic Publishers
- Subject
- Computer Science; Computer Communication Networks; Electrical Engineering; Characterization and Evaluation of Materials
- ISSN
- 1387-974X
- eISSN
- 1572-8188
- DOI
- 10.1023/A:1011955911519
- Publisher site
- See Article on Publisher Site
Abstract
In this paper, we propose novel traffic grooming algorithms to reduce the cost of the entire system in WDM multi-ring networks. In order to achieve this goal, it is important to construct a virtual topology and groom the traffic in these networks. We consider four kinds of virtual topologies of WDM multi-ring networks according to the way in which traffic is transmitted among rings. Accordingly, we design four kinds of traffic grooming (TG) algorithms depending on the considered virtual topologies: mixed (MTG), partially mixed (PMTG), separate (STG), and independent (ITG) traffic grooming algorithms. Each algorithm consists of a separation, a connection-ring construction, and a grooming procedure. In the separation procedure, all traffic connections are classified into intra and inter-connections. The connection-ring construction procedure makes full connection-rings from traffic connections. The grooming procedure groups connection-rings onto a wavelength in order to reduce the number of SONET add/drop multiplexers (SADMs) and wavelengths and to improve the utilization of network resources. To analyze the performance of each algorithm, a circular multi-ring architecture with uniform traffic is considered. The simulation results show that ITG and PMTG are more efficient in terms of wavelengths. STG and PMTG require a smaller number of SADMs.
Journal
Photonic Network Communications – Springer Journals
Published: Oct 9, 2004