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Content Delivery Analysis in Multiple Devices to Single Device Communications

Daghal, Asaad, Zhu, Huiling, Wang, Jiangzhou (2018) Content Delivery Analysis in Multiple Devices to Single Device Communications. IEEE Transactions on Vehicular Technology, . ISSN 0018-9545. (doi:10.1109/TVT.2018.2865012) (KAR id:69371)

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https://doi.org/10.1109/TVT.2018.2865012

Abstract

Content caching at mobile user devices (UDs) utilizing device to device (D2D) communications is a promising technology to enhance the performance of mobile networks, in terms of latency, throughput, energy consumption, and so on. In this paper, a novel method of content delivery using multiple devices to single device (MDSD) communications through D2D links is presented. In this method, the Zipf distribution with exponent shape parameter is adopted to model the content caching popularity for the analysis of the achievable signal to interference plus noise ratio (SINR). In order to investigate the advantage of the proposed MDSD method, firstly, a closedform expression of the outage probability is theoretically derived for a single D2D communication to evaluate the success of content delivery to a reference UD. Secondly, the expression of the outage probability for MDSD communication is derived, where the outage probability is modeled as a function of content caching popularity, the density of UDs, and the size of cooperative area. The research work is further extended to address the frequency reuse among different UDs in one cell, where a frequency band factor is introduced, and the optimal radius of the cooperative area is introduced and analysed. The analytical results, validated by the simulation results, show that the outage probability decreases drastically when the popularity of the content increases, or the radius of the cooperative area increases. Using the given closed-form expression of the outage probability, the area spectral efficiency (ASE) of the system is presented. Furthermore, the results show that as the frequency band factor increases, the outage probability decreases, as well as the ASE decreases. Finally, it is shown that the MDSD outperforms the single D2D-based method.

Item Type: Article
DOI/Identification number: 10.1109/TVT.2018.2865012
Uncontrolled keywords: D2D communication, Outage probability, Stochastic geometry, Poisson point process, Caching, Zipf distribution, Lomax distribution
Subjects: T Technology
Divisions: Faculties > Sciences > School of Engineering and Digital Arts > Broadband & Wireless Communications
Depositing User: Jiangzhou Wang
Date Deposited: 04 Oct 2018 13:38 UTC
Last Modified: 12 Feb 2020 04:10 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/69371 (The current URI for this page, for reference purposes)
Wang, Jiangzhou: https://orcid.org/0000-0003-0881-3594
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