University of Oulu

H. B. Mahmoodi, J. Kaleva, S. P. Shariatpanahi and A. Tölli, "D2D Assisted Multi-Antenna Coded Caching," in IEEE Access, vol. 11, pp. 16271-16287, 2023, doi: 10.1109/ACCESS.2023.3245882

D2D assisted multi-antenna coded caching

Saved in:
Author: Bakhshzad Mahmoodi, Hamidreza1; Kaleva, Jarkko2; Shariatpanahi, Seyed Pooya3;
Organizations: 1Centre for Wireless Communications, University of Oulu, Oulu, Finland
2Solmu Technologies, Oulu, Finland
3School of Electrical and Computer Engineering, College of Engineering, University of Tehran, Tehran, Iran
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.2 MB)
Persistent link:
Language: English
Published: Institute of Electrical and Electronics Engineers, 2023
Publish Date: 2023-08-11


A device-to-device (D2D) aided multi-antenna coded caching scheme is proposed to improve the average delivery rate and reduce the downlink (DL) beamforming complexity. Novel beamforming and resource allocation schemes are proposed where local data exchange among nearby users is exploited. The transmission is split into two phases: local D2D content exchange and DL transmission. In the D2D phase, subsets of users are selected to share content with the adjacent users directly. In this regard, a low complexity D2D mode selection algorithm is proposed to find the appropriate set of users for the D2D phase with comparable performance to the optimal exhaustive search. During the DL phase, the base station multicasts the remaining data requested by all the users. We identify scenarios and conditions where D2D transmission can reduce the delivery time. Furthermore, we demonstrate how adding the new D2D phase to the DL-only scenario can significantly reduce the beamformer design complexity in the DL phase. The results further highlight that by partly delivering requested data in the D2D phase, the transmission rate can be boosted due to more efficient use of resources during the subsequent DL phase. As a result, the overall content delivery performance is greatly enhanced, especially in the finite signal-to-noise (SNR) regime.

see all

Series: IEEE access
ISSN: 2169-3536
ISSN-E: 2169-3536
ISSN-L: 2169-3536
Volume: 11
Pages: 16271 - 16287
DOI: 10.1109/ACCESS.2023.3245882
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 319059 (Coded Collaborative Caching for Wireless Energy Efficiency) and Grant 318927 (6Genesis Flagship), in part by the Riitta Jorma J. Takasen Foundation, in part by the Nokia Foundation, in part by the Walter Ahlström Foundation, and in part by the Tauno Tönning Foundation.
Academy of Finland Grant Number: 319059
Detailed Information: 319059 (Academy of Finland Funding decision)
318927 (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