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
|Author:||Salehi, Mohammad Javad1; Tölli, Antti1; Shariatpanahi, Seyed Pooya2|
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
|Online Access:||PDF Full Text (PDF, 0.1 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe202102185295
Institute of Electrical and Electronics Engineers,
|Publish Date:|| 2021-02-18
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.
SPAWC. Signal processing advances in wireless communications
21st IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2020
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
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 (Academy of Finland Funding decision)
318927 (Academy of Finland Funding decision)
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