University of Oulu

M. Salehi, E. Parrinello, H. B. Mahmoodi and A. Tölli, "Low-Subpacketization Multi-Antenna Coded Caching for Dynamic Networks," 2022 Joint European Conference on Networks and Communications & 6G Summit (EuCNC/6G Summit), Grenoble, France, 2022, pp. 112-117, doi: 10.1109/EuCNC/6GSummit54941.2022.9815628

Low-subpacketization multi-antenna coded caching for dynamic networks

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Author: Salehi, MohammadJavad1; Parrinello, Emanuele2; Bakhshzad Mahmoodi, Hamidreza1;
Organizations: 1Centre for Wireless Communications, University of Oulu, Oulu, Finland
2Communication Systems Department, Eurecom, Sophia Antipolis, Biot, France
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.2 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2022
Publish Date: 2023-02-13


Multi-antenna coded caching combines a global caching gain, proportional to the total cache size in the network, with an additional spatial multiplexing gain that stems from multiple transmitting antennas. However, classic centralized coded caching schemes are not suitable for dynamic networks as they require prior knowledge of the number of users to indicate what data should be cached at each user during the placement phase. On the other hand, fully decentralized schemes provide comparable gains to their centralized counterparts only when the number of users is very large. In this paper, we propose a novel multi-antenna coded caching scheme for dynamic networks, where instead of defining individual cache contents, we associate users with a limited set of predefined caching profiles. Then, during the delivery phase, we aim at achieving a combined caching and spatial multiplexing gain, comparable to a large extent with the ideal case of fully centralized schemes. The resulting scheme imposes small subpacketization and beamforming overheads, is robust under dynamic network conditions, and incurs small finite-SNR performance loss compared with centralized schemes.

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Series: European Conference on Networks and Communications
ISSN: 2475-6490
ISSN-E: 2575-4912
ISSN-L: 2475-6490
ISBN: 978-1-6654-9871-5
ISBN Print: 978-1-6654-9872-2
Pages: 112 - 117
DOI: 10.1109/eucnc/6gsummit54941.2022.9815628
Host publication: 2022 Joint European Conference on Networks and Communications & 6G Summit (EuCNC/6G Summit)
Conference: Joint European Conference on Networks and Communications & 6G Summit
Type of Publication: A4 Article in conference proceedings
Field of Science: 213 Electronic, automation and communications engineering, electronics
Funding: This work is supported by the Academy of Finland under grant no. 318927 (6Genesis Flagship), and by Vaikuttavuussäätiö under the project Directional Data Delivery for Wireless Immersive Digital Environments (3D-WIDE).
Academy of Finland Grant Number: 318927
Detailed Information: 318927 (Academy of Finland Funding decision)
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