University of Oulu

M. Salehi and A. Tölli, "Diagonal Multi-Antenna Coded Caching for Reduced Subpacketization," GLOBECOM 2020 - 2020 IEEE Global Communications Conference, Taipei, Taiwan, 2020, pp. 1-6, doi: 10.1109/GLOBECOM42002.2020.9348098

Diagonal multi-antenna coded caching for reduced subpacketization

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Author: Salehi, Mohammad Javad1; Tölli, Antti1
Organizations: 1Center for Wireless Communications, University of Oulu, 90570 Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.1 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2020
Publish Date: 2021-03-03


Large subpacketization requirement is known to be a significant issue in the practical implementation of multiantenna coded caching schemes. In this paper, we introduce a new class of schemes applicable to any network in which the spatial degrees of freedom a is larger than or equal to the coded caching gain. This class of schemes, called diagonal coded caching (DCC), is based on a tabular representation of transmitted codewords and includes consecutive diagonal shifting of such representations over a well-defined placement table. We find the lower-bound for the required subpacketization for any DCC scheme and show that it is achievable using simple, novel algorithms. This not only enables smaller subpacketization compared to state of the art but also makes it possible to control the subpacketization by carefully adjusting the a parameter.

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Series: IEEE Global Communications Conference
ISSN: 2334-0983
ISSN-E: 2576-6813
ISSN-L: 2334-0983
ISBN: 978-1-7281-8298-8
ISBN Print: 978-1-7281-8299-5
Pages: 1 - 6
Article number: 9348098
DOI: 10.1109/GLOBECOM42002.2020.9348098
Host publication: GLOBECOM 2020 - 2020 IEEE Global Communications Conference
Conference: IEEE Global Communications Conference
Type of Publication: A4 Article in conference proceedings
Field of Science: 213 Electronic, automation and communications engineering, electronics
Funding: This work was supported by the Academy of Finland under grants no. 319059 (Coded Collaborative Caching for Wireless Energy Efficiency) and 318927 (6Genesis Flagship).
Academy of Finland Grant Number: 319059
Detailed Information: 319059 (Academy of Finland Funding decision)
318927 (Academy of Finland Funding decision)
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