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Cooperative directional inter-cell handover scheme in high altitude platform communications systems

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Journal of Electronics (China)

Abstract

A novel Cooperative Directional inter-cell Handover Scheme (CDHS) for High Altitude Platform (HAP) communications systems is proposed, in which the handover target cell and the two cells adjacent to this handover target cell work cooperatively to exploit the traffic fluctuation to improve handover performance. Users in the overlap area of the overloaded handover target cell will be forced to handover directionally before their optimal handover boundary in order to free up resources for the handover calls which would otherwise be dropped due to the shortage of resources and queue time out. Simulation results show that the handover call dropping probability is greatly reduced (at least 60%) compared with the general queue handover scheme, with little performance reduction to the call blocking probability, and the Not in the Best Cell (NBC) average time is only increased moderately. Moreover, an optimal cell radius can be achieved for a specific platform speed by minimizing the unified system performance, which is the linear combination of the handover call dropping probability and the NBC average time.

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Authors and Affiliations

  1. Communications Research Group, Department of Electronics, University of York, Heslington, York, YO10 5DD, UK

    Grace David

  2. School of Electronic Science and Engineering, National University of Defense Technology, Changsha, 410073, China

    Shufeng Li, Lijie Wang & Dongtang Ma

Authors
  1. Shufeng Li
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  2. Lijie Wang
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  3. Grace David
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  4. Dongtang Ma
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Corresponding author

Correspondence to Shufeng Li.

Additional information

Supported by the China Scholarship Council (2008611011) and Doctoral Fund of Ministry of Education of China (20094307110004).

Communication author: Li Shufeng, born in 1980, male, Ph.D. student.

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Li, S., Wang, L., David, G. et al. Cooperative directional inter-cell handover scheme in high altitude platform communications systems. J. Electron.(China) 28, 249–257 (2011). https://doi.org/10.1007/s11767-011-0574-0

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  • DOI: https://doi.org/10.1007/s11767-011-0574-0

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