University of Oulu

A. Tölli, S. P. Shariatpanahi, J. Kaleva and B. Khalaj, "Multicast mode selection for multi-antenna coded caching," 2018 16th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt), Shanghai, 2018, pp. 1-6. doi: 10.23919/WIOPT.2018.8362886

Multicast mode selection for multi-antenna coded caching

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Author: Tölli, Antti1; Shariatpanahi, Seyed Pooya2; Kaleva, Jarkko1;
Organizations: 1Centre for Wireless Communications, University of Oulu, P.O. Box 4500, 90014, Finland
2School of Computer Science, Institute for Research in Fundamental Sciences (IPM), Tehran, Iran
3Department of Electrical Engineering, Sharif University of Technology, Tehran, Iran
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.6 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2018
Publish Date: 2020-01-08


A wireless coded caching (CC) setup is considered, where a multi-antenna transmitter delivers contents to multiple cache-enabled users. Exploiting multicasting opportunities provided by the coded caching paradigm, novel interference management schemes are proposed by assigning carefully designed beamforming vectors to different multicast messages. Thereby, the proposed design benefits from spatial multiplexing gain, improved interference management and the global CC gain, simultaneously. In addition, a novel multicast mode selection scheme is proposed which determines the optimum multicast group sizes providing the best complexity-performance tradeoff for a given SNR range. While the proposed scheme exhibits the same near-optimal degrees-of-freedom (DoF) performance as previously proposed methods, it will surpass them at the practical finite SNR regimes. In addition to reducing the complexity, the proposed mode selection feature also provides significantly better rate than previously proposed schemes.

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ISBN: 978-3-903176-00-3
ISBN Print: 978-1-5386-4621-2
Article number: 17789147
DOI: 10.23919/WIOPT.2018.8362886
Host publication: Proceedings of the 16th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt), 7-11 May 2018, Shanghai, China
Conference: International Symposium on Modeling and Optimization in Mobile, Ad hoc, and Wireless Networks
Type of Publication: A4 Article in conference proceedings
Field of Science: 213 Electronic, automation and communications engineering, electronics
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