Hop-count fairness-aware protocols for improved bandwidth utilization in WDM burst-switched networks

    Authors

    S. Tariq;M. A. Bassiouni

    Comments

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    Abbreviated Journal Title

    Photonic Netw. Commun.

    Keywords

    Optical burst switching; Network throughput; Hop-count fairness; WDM; networks; OBS NETWORKS; PERFORMANCE; MULTIPLE; TCP; Computer Science, Information Systems; Optics; Telecommunications

    Abstract

    In this paper, we propose and evaluate two schemes for improving bandwidth utilization in optical burst-switched (OBS) networks employing timer-based burst assembly routines. The first scheme adjusts the size of the search space for a free wavelength in optical switches using a balancing formula that promotes throughput and hop-count fairness. The formula achieves controllable increase in the size of the search space either when the size of the burst increases or when the hop count of the traveling burst increases. The second scheme proactively discards bursts at the source network access station using a dropping probability matrix that satisfies certain horizontal and vertical constraints. The matrix assigns smaller dropping probabilities to bursts with larger sizes and longer lightpaths. The results of extensive performance tests to evaluate the two schemes and compare them with previous schemes for improving fairness and throughput are presented and discussed. The results show that the two schemes improve the throughput of optical OBS networks and enhance the hop-count fairness.

    Journal Title

    Photonic Network Communications

    Volume

    25

    Issue/Number

    1

    Publication Date

    1-1-2013

    Document Type

    Article

    Language

    English

    First Page

    35

    Last Page

    46

    WOS Identifier

    WOS:000313162500004

    ISSN

    1387-974X

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