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Randomized Caching in Cooperative UAV-Enabled Fog-RAN

We consider an unmanned aerial vehicle enabled (UAV-enabled) fog-radio access network (F-RAN) in which UAVs are considered as flying remote radio heads (RRH) equipped with caching and cooperative communications capabilities. We are mainly focus on probabilistic/randomized content placement strategy,...

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Main Authors:	Khoshkholgh, M. G., Navaie, Keivan, Yanikomeroglu, Halim, Leung, V. C. M., Shin, Kang G.
Format:	Conference Proceeding
Language:	English
Subjects:	Attenuation Cooperative communication Fading channels Interference Libraries Probabilistic logic Shadow mapping
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creator	Khoshkholgh, M. G. Navaie, Keivan Yanikomeroglu, Halim Leung, V. C. M. Shin, Kang G.
description	We consider an unmanned aerial vehicle enabled (UAV-enabled) fog-radio access network (F-RAN) in which UAVs are considered as flying remote radio heads (RRH) equipped with caching and cooperative communications capabilities. We are mainly focus on probabilistic/randomized content placement strategy, and accordingly formulate the content placement as an optimization problem. We then study the efficiency of the proposed content placement by evaluating the average system capacity and its energy-efficiency. Our results indicate that cooperative communication plays an essential role in UAV-enabled edge communications as it effectively curbs the impact of dominant Line-of-Sight (LOS) received interference. It is also seen that cooperative cache-enabled UAV F-RAN performs better in high-rise environments than dense urban and sub-urban environments. This is due to a significant reduction of the received LOS interference because of blockage by the high-rise buildings, and the performance gain of cooperative communication on the attending signal. Comparing the performances of the developed content placement strategy and conventional caching techniques shows that our proposed probabilistic/randomized caching outperforms the others in most of the practical cases.
doi_str_mv	10.1109/WCNC.2019.8885486
format	conference_proceeding
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source	IEEE Xplore All Conference Series
subjects	Attenuation Cooperative communication Fading channels Interference Libraries Probabilistic logic Shadow mapping
title	Randomized Caching in Cooperative UAV-Enabled Fog-RAN
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