Backhaul-Based Cooperative Caching in Small Cell Network

Yu Ting Wang*, Yun Zhan Cai, Lo An Chen, Sian Jhe Lin, Meng Hsun Tsai

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations


As mobile devices become more and more ubiquitous, mobile traffic demands are increasing exponentially. To deal with such challenge, caching is considered as an effective way to reduce redundant transmissions. Cooperative caching allows the cache storage to be used more efficiently and increases cache hit rate to further reduce the downloading latency. Recent researches assume that a mobile user can be served by multiple small cell base stations (SBSs) simultaneously, yet this hypothesis requires costly re-design of the infrastructure’s physical layer. In this paper, we propose a backhaul-based cooperative caching scheme which groups several SBSs into a cluster and the SBSs cooperate through wired interfaces. We first formulate a delay minimization problem for cooperative caching, and then propose a greedy algorithm to obtain the content placement with maximum reduced delay. We also explore the impact on end-to-end latency under different simulation parameters, such as cache size and the skewness of the popularity of requested contents.

Original languageEnglish
Title of host publicationAdvanced Information Networking and Applications - Proceedings of the 33rd International Conference on Advanced Information Networking and Applications AINA-2019
EditorsLeonard Barolli, Fatos Xhafa, Tomoya Enokido, Makoto Takizawa
PublisherSpringer Verlag
Number of pages12
ISBN (Print)9783030150310
StatePublished - 2020
Event33rd International Conference on Advanced Information Networking and Applications, AINA-2019 - Matsue, Japan
Duration: 27 Mar 201929 Mar 2019

Publication series

NameAdvances in Intelligent Systems and Computing
ISSN (Print)2194-5357


Conference33rd International Conference on Advanced Information Networking and Applications, AINA-2019


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