Caching at the wireless edge: design aspects, challenges, and future directions
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TLDR
Methods to predict the popularity distributions and user preferences, and the impact of erroneous information are introduced, as well as the key differences between wired and wireless caching.Abstract:
Caching at the wireless edge is a promising way to boost spectral efficiency and reduce energy consumption of wireless systems. These improvements are rooted in the fact that popular contents are reused, asynchronously, by many users. In this article we first introduce methods to predict the popularity distributions and user preferences, and the impact of erroneous information. We then discuss the two aspects of caching systems, content placement and delivery. We expound the key differences between wired and wireless caching, and outline the differences in the system arising from where the caching takes place (e.g., at base stations or on the wireless devices themselves). Special attention is paid to the essential limitations in wireless caching, and possible trade-offs between spectral efficiency, energy efficiency, and cache size.read more
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Cache in the air: exploiting content caching and delivery techniques for 5G systems
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Living on the Edge: The Role of Proactive Caching in 5G Wireless Networks
TL;DR: This article explores one of the key enablers of beyond 4G wireless networks leveraging small cell network deployments, proactive caching, and proposes a mechanism whereby files are proactively cached during off-peak periods based on file popularity and correlations among user and file patterns.
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