University of Oulu

H. B. Mahmoodi, M. J. Salehi and A. Tölli, "Asymmetric Multi-Antenna Coded Caching for Location-Dependent Content Delivery," GLOBECOM 2022 - 2022 IEEE Global Communications Conference, Rio de Janeiro, Brazil, 2022, pp. 1930-1935, doi: 10.1109/GLOBECOM48099.2022.10001456

Asymmetric multi-antenna coded caching for location-dependent content delivery

Saved in:
Author: Bakhshzad Mahmood, Hamidreza1; 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, 0.6 MB)
Persistent link:
Language: English
Published: IEEE, 2022
Publish Date: 2023-02-09


Efficient usage of in-device storage and computation capabilities are key solutions to support data-intensive applications such as immersive digital experiences. This paper proposes a location-dependent multi-antenna coded caching - based content delivery scheme tailored specifically for wireless immersive viewing applications. First, a novel memory allocation process incentivizes the content relevant to the identified wireless bottleneck areas. This enables a trade-off between local and global caching gains and results in unequal fractions of location-dependent multimedia content cached by each user. Then, a novel packet generation process is carried out during the subsequent delivery phase, given the asymmetric cache placement. During this phase, the number of packets transmitted to each user is the same, while the sizes of the packets are proportional to the corresponding location-dependent cache ratios. In this regard, each user is served with location-specific content using joint multicast beamforming and a multi-rate modulation scheme that simultaneously benefits from global caching and spatial multiplexing gains. Numerical experiments and mathematical analysis demonstrate significant performance gains compared to the state-of-the-art.

see all

ISBN: 978-1-6654-3540-6
ISBN Print: 978-1-6654-3541-3
Pages: 1930 - 1935
DOI: 10.1109/GLOBECOM48099.2022.10001456
Host publication: GLOBECOM 2022 - 2022 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 is supported by the Academy of Finland under grants no. 318927 (6G Flagship), 319059 and 343586, and by the Finnish Research Impact Foundation (Vaikuttavuuss ̈a ̈ati ̈o) 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)
319059 (Academy of Finland Funding decision)
343586 (Academy of Finland Funding decision)
Copyright information: © 2022 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.