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Survivable Architecture with Dynamic Wavelength and Bandwidth Allocation Scheme in WDM-EPON

  • I-Shyan Hwang
  • Zen-Der Shyu
  • Chun-Che Chang
Chapter
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 33)

Abstract

This study proposes a novel fault-tolerant architecture in WDM-EPON, Cost-based Fault-tolerant WDM-EPON (CFT-WDM-EPON), to provide overall protection. The CFT-WDM-EPON only equips a backup feeder fiber to recover the system failure. Additionally, a prediction-based fair wavelength and bandwidth allocation (PFWBA) scheme is also proposed to enhance the differentiated services for WDM-EPON based on the Dynamic Wavelength Allocation (DWA) and Prediction-based Fair Excessive Bandwidth Reallocation (PFEBR). The PFEBR involves an Early-DBA mechanism, which improves prediction accuracy by delaying report messages of unstable traffic ONUs, and assigns linear estimation credit to predict the arrival of traffic during waiting time. The DWA can operate in coordination with an unstable degree list to allocate the available time of wavelength precisely. Simulation results show that the proposed PFWBA scheme outperforms the WDM IPACT-ST with a single polling table and the Dynamic wavelength and bandwidth 3 (DWBA3) in terms of end-to-end delay and jitter performance.

Keywords

Fault tolerance WDM-EPON Differentiated services PFEBR 

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Copyright information

© Springer Science+Business Media B.V 2009

Authors and Affiliations

  • I-Shyan Hwang
    • 1
  • Zen-Der Shyu
    • 2
  • Chun-Che Chang
    • 1
  1. 1.Department of Computer Engineering and ScienceYuan-Ze UniversityChung-LiROC
  2. 2.Department of General StudiesArmy AcademyChung-LiROC

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