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Design and implementation of a new scheduler for enhancing multi-rate fairness in IEEE 802.16

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Abstract

Without the definition of a mandatory scheduling algorithm for channel resource assignment, WiMAX is open to Quality of Service (QoS) enhancements by research groups and developers, at the aim of managing heterogeneous flows with different QoS requirements. Furthermore, besides performance enhancement, another key issue arises for QoS delivery: it is known as multi-rate fairness and it deals with efficient resource allocation for providing sufficient bandwidth to high rate flows, without penalizing low rate ones. In this paper, uplink scheduling algorithms are studied and an innovative solution is proposed to achieve performance enhancement, multi-rate fairness and improved QoS management. After an overview of the state of the art, two scheduling algorithms based on Deficit Round Robin are studied, implemented and tested in NS2 simulator. The schedulers are validated and compared through exhaustive simulations, showing the benefits coming from the adoption of the proposed scheduling mechanism.

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Authors and Affiliations

  1. Dipartimento di Ingegneria dell’Informazione, Università degli Studi di Siena, Via Roma 56, 53100, Siena, Italy

    Alessandro Andreadis, Sandro Rizzuto & Riccardo Zambon

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  1. Alessandro Andreadis
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  2. Sandro Rizzuto
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  3. Riccardo Zambon
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Correspondence to Alessandro Andreadis.

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Andreadis, A., Rizzuto, S. & Zambon, R. Design and implementation of a new scheduler for enhancing multi-rate fairness in IEEE 802.16. Telecommun Syst 57, 247–259 (2014). https://doi.org/10.1007/s11235-013-9811-1

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