University of Oulu

M. Abolpour, M. J. Salehi and A. Tölli, "Coded Caching and Spatial Multiplexing Gain Trade-off in Dynamic MISO Networks," 2022 IEEE 23rd International Workshop on Signal Processing Advances in Wireless Communication (SPAWC), Oulu, Finland, 2022, pp. 1-5, doi: 10.1109/SPAWC51304.2022.9834002.

Coded caching and spatial multiplexing gain trade-off in dynamic MISO networks

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Author: Abolpour, Milad1; Salehi, MohammadJavad1; Tölli, Antti1
Organizations: 1Centre for Wireless Communications, University of Oulu, 90570 Oulu, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.7 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe2023020926633
Language: English
Published: Institute of Electrical and Electronics Engineers, 2022
Publish Date: 2023-02-09
Description:

Abstract

The global caching gain of multi-antenna coded caching techniques can be also mostly achieved in dynamic network setups, where the cache contents of users are dictated by a central server, and each user can freely join or leave the network at any moment. In the dynamic setup, users are assigned to a limited set of caching profiles and the non-uniformness in the number of users assigned to each profile is compensated during the delivery phase by either adding phantom users for multicasting or serving a subset of users with unicast transmissions. In this paper, we perform a thorough analysis and provide closed-form representations of the achievable degrees of freedom (DoF) in such hybrid schemes, and assess the inherent trade-off between the global caching and spatial multiplexing gains caused by either adding phantom users or serving parts of the data through unicasting.

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Series: IEEE International Workshop on Signal Processing Advances in Wireless Communications
ISSN: 2325-3789
ISSN-L: 2325-3789
ISBN: 978-1-6654-9455-7
ISBN Print: 978-1-6654-9456-4
Article number: 9834002
DOI: 10.1109/spawc51304.2022.9834002
OADOI: https://oadoi.org/10.1109/spawc51304.2022.9834002
Host publication: 2022 IEEE 23rd International Workshop on Signal Processing Advances in Wireless Communication (SPAWC), 04-06 July 2022, Oulu, Finland
Conference: IEEE International Workshop on Signal Processing Advances in Wireless Communication
Type of Publication: A4 Article in conference proceedings
Field of Science: 213 Electronic, automation and communications engineering, electronics
Subjects:
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