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An adaptive load-aware burst assembly scheme to achieve optimal performance of FDL buffers in OBS networks

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Abstract

Optical burst switching (OBS) is regarded as one of the most promising switching technologies for next generation optical networks. Contention resolution of data bursts is a critical mission to implement practical OBS. The use of fiber delay line (FDL) buffers has received a lot of attention as a fundamental but effective solution to resolve burst contention. Several studies have investigated the way to achieve the optimal performance of FDL buffers at a single-node level. However, this article studies how to achieve the best performance of OBS networks with FDL buffers under varying traffic condition at a network level. For this purpose, we propose an adaptive load-aware burst assembly (ALBA) scheme, which adaptively adjusts the size threshold of burst assembler optimized to the current network traffic load. A piggybacking method used to deliver the traffic-load information from core nodes to ingress edge nodes accelerates the adaptiveness of the proposed scheme by reducing the update time of the size threshold. The effectiveness of the ALBA scheme is proved by comparing with No-FDL case and fixed size-threshold cases under changing traffic-load environment from extensive simulation tests.

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Authors and Affiliations

  1. Optical Internet Research Center, Information and Communications University, 119 Munjiro, Yuseong-gu, Daejeon, South Korea

    Hongkyu Jeong & Minho Kang

  2. Platform Laboratory, KT Corporation, 463-1 Jeonmin-dong, Yuseong-gu, Daejeong, South Korea

    JungYul Choi

Authors
  1. Hongkyu Jeong
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  2. JungYul Choi
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  3. Minho Kang
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Correspondence to Hongkyu Jeong.

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Jeong, H., Choi, J. & Kang, M. An adaptive load-aware burst assembly scheme to achieve optimal performance of FDL buffers in OBS networks. Photon Netw Commun 17, 238–244 (2009). https://doi.org/10.1007/s11107-008-0158-6

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  • DOI: https://doi.org/10.1007/s11107-008-0158-6

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