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Coding, Multicast and Cooperation for Cache-Enabled Heterogeneous Small Cell Networks

Liao, J; Wong, KK; Zhang, Y; Zheng, Z; Yang, K; (2017) Coding, Multicast and Cooperation for Cache-Enabled Heterogeneous Small Cell Networks. IEEE Transactions on Wireless Communications , 16 (10) 6838 -6853. 10.1109/TWC.2017.2731967. Green open access

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Abstract

CCBY Caching at the wireless edge is a promising approach to deal with massive content delivery in heterogeneous wireless networks which have high demands on backhaul. In this paper, a typical cache-enabled small cell network under heterogeneous file and network settings is considered using maximum distance separable (MDS) codes for content restructuring. Unlike those in the literature considering online settings with the assumption of perfect user request information, we estimate the joint user requests using the file popularity information and aim to minimize the long-term average backhaul load for fetching content from external storage subject to the overall cache capacity constraint by optimizing the content placement in all the cells jointly. Both multicast-aware caching and cooperative caching schemes with optimal content placement are proposed. In order to combine the advantages of multicast content delivery and cooperative content sharing, a compound caching technique, which is referred to as multicast-aware cooperative caching, is then developed. For this technique, a greedy approach and a multicast-aware in-cluster cooperative approach are proposed for the small scale networks and large scale networks, respectively. Mathematical analysis and simulation results are presented to illustrate the advantages of MDS codes, multicast and cooperation in terms of reducing the backhaul requirements for cache-enabled small cell networks.

Type: Article
Title: Coding, Multicast and Cooperation for Cache-Enabled Heterogeneous Small Cell Networks
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/TWC.2017.2731967
Publisher version: http://dx.doi.org/10.1109/TWC.2017.2731967
Language: English
Additional information: This work is licensed under a Creative Commons Attribution 3.0 License. For more information, see http://creativecommons.org/licenses/by/3.0/.
Keywords: Cooperative caching, Microcell networks, Resource management, Wireless networks, Electronic mail, Optimization
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10022752
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