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Opportunistic Nonorthogonal Packet Scheduling in Fixed Broadband Wireless Access Networks

EURASIP Journal on Wireless Communications and Networking volume 2006, Article number: 080493 (2006) Cite this article

Abstract

In order to mitigate high cochannel interference resulting from dense channel reuse, the interference management issues are often considered as essential part of scheduling schemes in fixed broadband wireless access (FBWA) networks. To that end, a series of literature has been published recently, in which a group of base stations forms an interferer group (downlink transmissions from each base station become dominant interference for the users in other in-group base stations), and the scheduling scheme deployed in the group allows only one base station to transmit at a time. As a result of time orthogonality in transmissions, the dominant cochannel interferers are prevented, and hence the packet error rate can be improved. However, prohibiting concurrent transmissions in these orthogonal schemes introduces throughput penalty as well as higher end-to-end packet delay which might not be desirable for real-time services. In this paper, we utilize opportunistic nonorthogonality among the in-group transmissions whenever possible and propose a novel transmission scheduling scheme for FBWA networks. The proposed scheme, in contrast to the proactive interference avoidance techniques, strives for the improvements in delay and throughput efficiency. To facilitate opportunistic nonorthogonal transmissions in the interferer group, estimation of signal-to-interference-plus-noise ratio (SINR) is required at the scheduler. We have observed from simulations that the proposed scheme outperforms the reference orthogonal scheme in terms of spectral efficiency, mean packet delay, and packet dropping rate.

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Authors and Affiliations

  1. Communications and Wireless Systems (BCWS) Centre, Department of Systems and Computer Engineering, Carleton University, Ottawa, Ontario, K1S 5B6, Canada

    Mahmudur Rahman, Halim Yanikomeroglu & Samy Mahmoud

  2. Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, NL, A1B 3X5, Canada

    Mohamed H Ahmed

Authors
  1. Mahmudur Rahman
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  2. Halim Yanikomeroglu
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  3. Mohamed H Ahmed
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  4. Samy Mahmoud
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Correspondence to Mahmudur Rahman.

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Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License ( https://creativecommons.org/licenses/by/2.0 ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Rahman, M., Yanikomeroglu, H., Ahmed, M. et al. Opportunistic Nonorthogonal Packet Scheduling in Fixed Broadband Wireless Access Networks. J Wireless Com Network 2006, 080493 (2006). https://doi.org/10.1155/WCN/2006/80493

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  • DOI: https://doi.org/10.1155/WCN/2006/80493

Keywords

  • Schedule Scheme
  • Packet Delay
  • Proactive Interference
  • Packet Error Rate
  • Wireless Access Network