University of Oulu

M. Salehi, K. Hooli, J. Hulkkonen and A. Tölli, "Enhancing Next-Generation Extended Reality Applications With Coded Caching," in IEEE Open Journal of the Communications Society, vol. 4, pp. 1371-1382, 2023, doi: 10.1109/OJCOMS.2023.3286473

Enhancing next-generation extended reality applications with coded caching

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Author: Salehi, Mohammadjavad1; Hooli, Kari2; Hulkkonen, Jari2;
Organizations: 1Center for Wireless Communications, University of Oulu, Oulu, Finland
2Radio Research, Nokia Standards, Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 3.1 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2023
Publish Date: 2023-09-08


The next evolutionary step in human-computer interfaces will bring forward immersive digital experiences that submerge users in a 3D world while allowing them to interact with virtual or twin objects. Accordingly, various collaborative extended reality (XR) applications are expected to emerge, imposing stringent performance requirements on the underlying wireless connectivity infrastructure. In this paper, we examine how novel multi-antenna coded caching (CC) techniques can facilitate high-rate low-latency communications and improve users’ quality of experience (QoE) in our envisioned multi-user XR scenario. Specifically, we discuss how these techniques make it possible to prioritize the content relevant to wireless bottleneck areas while enabling the cumulative cache memory of the users to be utilized as an additional communication resource. In this regard, we first explore recent advancements in multi-antenna CC that facilitate the efficient use of distributed in-device memory resources. Then, we review how XR application requirements are addressed within the third-generation partnership project (3GPP) framework and how our envisioned XR scenario relates to the foreseen use cases. Finally, we identify new challenges arising from integrating CC techniques into multi-user XR scenarios and propose novel solutions to address them in practice.

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Series: IEEE open journal of the Communications Society
ISSN: 2644-125X
ISSN-E: 2644-125X
ISSN-L: 2644-125X
Volume: 4
Pages: 1371 - 1382
DOI: 10.1109/OJCOMS.2023.3286473
Type of Publication: A1 Journal article – refereed
Field of Science: 213 Electronic, automation and communications engineering, electronics
Funding: This work was supported in part by the Academy of Finland under Grant 318927 (6Genesis Flagship) and Grant 343586 (CAMAIDE), and in part by the Finnish Research Impact Foundation under Project 3D-WIDE.
Academy of Finland Grant Number: 318927
Detailed Information: 318927 (Academy of Finland Funding decision)
343586 (Academy of Finland Funding decision)
Copyright information: © The Author(s) 2023. This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see