University of Oulu

M. Salehi, A. Tölli and S. P. Shariatpanahi, "Coded Caching with Uneven Channels: A Quality of Experience Approach," 2020 IEEE 21st International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), Atlanta, GA, USA, 2020, pp. 1-5, doi: 10.1109/SPAWC48557.2020.9154234

Coded caching with uneven channels : a quality of experience approach

Saved in:
Author: Salehi, Mohammad Javad1; Tölli, Antti1; Shariatpanahi, Seyed Pooya2
Organizations: 1Center for Wireless Communications (CWC), University of Oulu, 90570, Oulu, Finland
2School of Electrical and Computer Engineering College of Engineering, University of Tehran Tehran, Iran
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.1 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe202102185295
Language: English
Published: Institute of Electrical and Electronics Engineers, 2020
Publish Date: 2021-02-18
Description:

Abstract

The rate performance of wireless coded caching schemes is typically limited by the lowest achievable per-user rate in the given multicast group, during each transmission time slot. In this paper, we provide a new coded caching scheme, alleviating this worst-user effect for the prominent case of multimedia applications. In our scheme, instead of maximizing the symmetric rate among all served users, we maximize the total quality of experience (QoE); where QoE at each user is defined as the video quality perceived by that user. We show the new scheme requires solving an NP-hard optimization problem. Thus, we provide two heuristic algorithms to solve it in an approximate manner; and numerically demonstrate the near-optimality of the proposed approximations. Our approach allows flexible allocation of distinct video quality for each user, making wireless coded caching schemes more suitable for real-world implementations.

see all

Series: SPAWC. Signal processing advances in wireless communications
ISSN: 1948-3244
ISSN-E: 1948-3252
ISSN-L: 1948-3244
ISBN: 978-1-7281-5478-7
ISBN Print: 978-1-7281-5479-4
Article number: 9154234
DOI: 10.1109/SPAWC48557.2020.9154234
OADOI: https://oadoi.org/10.1109/SPAWC48557.2020.9154234
Host publication: 21st IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2020
Conference: IEEE International Workshop on Signal Processing Advances in Wireless Communications
Type of Publication: A4 Article in conference proceedings
Field of Science: 213 Electronic, automation and communications engineering, electronics
Subjects:
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
318927
Detailed Information: 319059 (Academy of Finland Funding decision)
318927 (Academy of Finland Funding decision)
Copyright information: © 2020 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.