Content caching and allocation in spatially correlated small cells

Khan, Komal S., Haider, Noman, and Jamalipour, Abbas (2021) Content caching and allocation in spatially correlated small cells. In: Proceedings of 2020 IEEE Global Communications Conference. From: GLOBECOM 2020: 2020 IEEE Global Communications Conference, 7-11 December 2020, Taipei, Taiwan.

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Optimal content caching has been an important topic in dense small cell networks. Due to spatial and temporal variation in the popularity of data, most content requests cannot be directly served by the lower tiers of the network, increasing the chances of congestion at the core network. This raises the issues of what to cache and where to cache, especially for content with different popularity patterns in a given region. In this work, we focus on the issue of redundant caching of popular files in a cluster when designing a content allocation scheme. We formulate the considered problem as a stable matching theory problem, where the preferences of each cache entity are sent to the Macro Base Station (MBS) for stable matching. The caches share their request lists with the MBS, which subsequently uses Irving OneSided matching algorithm to generate a unique preference list for each caching entity such that every preference list is a representative of the popular data in that region. The algorithm achieves the desired goal of efficient caching with few but smartly planned repetitions of the popular files. Results show that our proposed scheme provides better performance in terms of cache hit ratio with increasing number of requests as compared to a popularity based scheme.

Item ID: 66290
Item Type: Conference Item (Research - E1)
ISBN: 978-1-7281-8298-8
ISSN: 2576-6813
Keywords: Content caching, matching algorithm, small cells, ultra-dense networks
Copyright Information: © 2020 IEEE.
Date Deposited: 26 Feb 2021 00:14
FoR Codes: 40 ENGINEERING > 4006 Communications engineering > 400608 Wireless communication systems and technologies (incl. microwave and millimetrewave) @ 70%
40 ENGINEERING > 4006 Communications engineering > 400602 Data communications @ 30%
SEO Codes: 22 INFORMATION AND COMMUNICATION SERVICES > 2201 Communication technologies, systems and services > 220103 Mobile technologies and communications @ 100%
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