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Performance analysis of hybrid UAV networks for probabilistic content caching
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Khuwaja, Aziz Altaf, Zhu, Yongxu, Zheng, Gan, Chen, Yunfei and Liu, Wei (2021) Performance analysis of hybrid UAV networks for probabilistic content caching. IEEE Systems Journal, 15 (3). 4013 -4024. doi:10.1109/JSYST.2020.3013786 ISSN 1932-8184.
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WRAP-Performance-analysis-hybrid-UAV-networks-content-caching-Chen-2020.pdf - Accepted Version - Requires a PDF viewer. Download (1817Kb) | Preview |
Official URL: https://doi.org/10.1109/JSYST.2020.3013786
Abstract
Caching content in small-cell networks can reduce the traffic congestion in backhaul. In this article, we develop a hybrid caching network comprising of unmanned aerial vehicles (UAVs) and ground small-cell base stations (SBSs), where UAVs are preferred because of their flexibility and elevated platform for line of sight. First, we derive the association probability for the ground user affiliated with a UAV and ground SBS. Then, we derive the successful content delivery probability by considering both the intercell and intracell interference. We also analyze the energy efficiency of the hybrid network and compare it with the separate UAV and ground networks. We further propose the caching scheme to improve the successful content delivery by managing the content popularity, where the part of the caching capacity in each UAV and ground SBS is reserved to store the most popular content (MPC), while the remaining stores less popular contents. Numerical results unveil that the proposed caching scheme has an improvement of 26.6% in content delivery performance over the MPC caching, which overlooks the impact of content diversity during caching.
| Item Type: | Journal Article | |||||||||||||||
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| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering T Technology > TL Motor vehicles. Aeronautics. Astronautics |
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| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | |||||||||||||||
| Library of Congress Subject Headings (LCSH): | Wireless communication systems, Drone aircraft | |||||||||||||||
| Journal or Publication Title: | IEEE Systems Journal | |||||||||||||||
| Publisher: | Institute of Electrical and Electronics Engineers | |||||||||||||||
| ISSN: | 1932-8184 | |||||||||||||||
| Official Date: | September 2021 | |||||||||||||||
| Dates: |
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| Volume: | 15 | |||||||||||||||
| Number: | 3 | |||||||||||||||
| Page Range: | 4013 -4024 | |||||||||||||||
| DOI: | 10.1109/JSYST.2020.3013786 | |||||||||||||||
| Status: | Peer Reviewed | |||||||||||||||
| Publication Status: | Published | |||||||||||||||
| Reuse Statement (publisher, data, author rights): | © 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. | |||||||||||||||
| Access rights to Published version: | Restricted or Subscription Access | |||||||||||||||
| Date of first compliant deposit: | 3 September 2020 | |||||||||||||||
| Date of first compliant Open Access: | 7 September 2020 | |||||||||||||||
| RIOXX Funder/Project Grant: |
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