Coded Caching Clusters with Device-to-Device Communications

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2019-02-01
Major/Subject
Mcode
Degree programme
Language
en
Pages
12
Series
IEEE Transactions on Mobile Computing
Abstract
We consider a geographically constrained caching community where popular data files are cached on mobile terminals and distributed through Device-to-Device (D2D) communications. To ensure availability, data files are protected against user mobility, or churn, with select caching and erasure coding methods. Communication and storage costs are considered, with an objective of minimizing the consumption of radio resources, given an available storage size. We focus on finding the coding method that minimizes the overall cost. Closed-form expressions for the expected consumption of radio resources incurred by data delivery and redundancy maintenance are derived. Closed form transmission costs in a circular caching community with a specific node density and caching method are calculated, when cost obeys a power law of distance. Our results are illustrated by numerical examples and verified by extensive computer simulations.
Description
Keywords
Device-to-Device Communications, Distributed Data Storage, Markov Processes, Regenerating Codes, Wireless Caching
Other note
Citation
Paakkonen , J , Barreal , A , Hollanti , C & Tirkkonen , O 2019 , ' Coded Caching Clusters with Device-to-Device Communications ' , IEEE Transactions on Mobile Computing , vol. 18 , no. 2 , 8353772 , pp. 264 - 275 . https://doi.org/10.1109/TMC.2018.2832636