Using constrained preemption to improve dropping fairness in optical burst switching networks

    Authors

    B. Zhou; M. A. Bassiouni;G. F. Li

    Comments

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    Abbreviated Journal Title

    Telecommun. Syst.

    Keywords

    optical burst switching; wavelength division multiplexing; protocol; fairness; performance evaluation; Telecommunications

    Abstract

    In this paper, we propose a new scheme to tackle the "beat down" unfairness problem in optical burst switching networks. In the new scheme, the control packets of bursts with higher preemptive metric value are allowed to preempt the channel resources reserved earlier for bursts with lower preemptive value. However, the control packets of preempted bursts continue to make wasted channel reservations in successive optical cross connects along the burst lightpaths and may also preempt other data bursts. Unchecked preemptions, therefore, can degrade the throughput of the network and induce reverse unfairness. Our scheme uses carefully designed constraints to avoid excessive wasted channel reservations, reduce cascaded useless preemptions, and maintain healthy throughput levels. The extensive simulation results show that the constrained preemption scheme improves fairness compared to previous methods without degrading network throughput.

    Journal Title

    Telecommunication Systems

    Volume

    34

    Issue/Number

    3-4

    Publication Date

    1-1-2007

    Document Type

    Article

    Language

    English

    First Page

    181

    Last Page

    194

    WOS Identifier

    WOS:000247260000007

    ISSN

    1018-4864

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