@article{cd95219a3e00494e9af7fc4964ddd18e,
title = "Reducing download delay for cooperative caching in small cell network",
abstract = "As mobile devices become more and more popular, mobile traffic demands are increasing exponentially. To deal with such challenge, caching at small cell base stations (SBSs) is one of the most effective techniques for reducing the transmission delay of mobile applications. However, due to the limitation of the SBS storages, the improvement of reducing transmission delay is limited in small cell networks. In this paper, we propose a novel cooperative caching framework in a small cell network in which SBSs are grouped into disjoint clusters and cooperate through backhaul links to make use of SBS storages. A backhaul-based cooperative caching (BCC) scheme is introduced, and the problem for content placement is formulated to minimize the average download delay in small cell networks. Then, we show that the problem is equivalent to the maximization of a monotone submodular function subject to matroid constraints and propose a low-complexity greedy strategy with 1/2 performance guarantee. Simulation results demonstrate that the proposed scheme achieves lower download delay and better cache hit rate than other schemes.",
author = "Wang, {Yu Ting} and Cai, {Yun Zhan} and Chen, {Lo An} and Lin, {Sian Jhe} and Liu, {Ren Shiou} and Tsai, {Meng Hsun}",
note = "Funding Information: This work was supported by the Center for Open Intelligent Connectivity through the Featured Areas Research Center Program within the Framework of the Higher Education Sprout Project by the Ministry of Education in Taiwan. The work of Y.-Z. Cai was sponsored in part by Google Ph.D. Fellowship and the R&D enhancement project “R&D of Network Behavior Security Analyses for IoT Devices on Advanced Edge Switch in an AIOT plus SDN Integrated Platform,” which is executed by EstiNet Technologies Inc. and partially sponsored by Hsinchu Science Park Bureau, Ministry of Science and Technology, Taiwan, R.O.C. The work of M.-H. Tsai was supported in part by the MOST under Grant 107-2221-E-006-062, 108-2221-E-006-112 and Grant 109-2221-E-006-160-, and in part by the Industrial Technology Research Institute. Publisher Copyright: {\textcopyright} 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.",
year = "2022",
month = feb,
doi = "10.1007/s11276-021-02844-3",
language = "English",
volume = "28",
pages = "587--602",
journal = "Wireless Networks",
issn = "1022-0038",
publisher = "Springer Netherlands",
number = "2",
}