University of Oulu

V. Tapio, A. Shojaeifard, I. Hemadeh, A. Mourad and M. Juntti, "Reconfigurable Intelligent Surface for 5G NR Uplink Coverage Enhancement," 2021 IEEE 94th Vehicular Technology Conference (VTC2021-Fall), 2021, pp. 1-5, doi: 10.1109/VTC2021-Fall52928.2021.9625081

Reconfigurable intelligent surface for 5G NR uplink coverage enhancement

Saved in:
Author: Tapio, Visa1; Shojaeifard, Arman2; Hemadeh, Ibrahim2;
Organizations: 1Centre for Wireles Communications (CWC), University of Oulu, Oulu, Finland
2InterDigital Europe, Ltd., London, UK
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.3 MB)
Persistent link:
Language: English
Published: Institute of Electrical and Electronics Engineers, 2021
Publish Date: 2022-02-17


Reconfigurable intelligent surfaces (RIS) have the ability to steer the electromagnetic (EM) waves to a desired direction. This enables the improvement of the wireless link performance by allowing the illumination of receivers otherwise shadowed by buildings or hills. In this paper, a standards-compliant link-level simulator is developed to study the performance improvement offered by a RIS in 5G New Radio (NR) uplink operating at sub-6 GHz bands. At these frequencies the direct channel between the user and base station is rarely completely blocked, but given the stringent power restrictions of devices, the RIS is utilized for enhancing the coverage performance in the uplink direction. In the studied cases, the transmitter (TX) is close to the RIS and a line-of-sight (LoS) path between the TX and RIS is assumed. The channel between the TX and receiver (RX) is modeled as a non-line-of-sight (NLoS) channel with 5G NR clustered delay line A (CDL-A) profile. Both LoS and NLoS channels between the RIS and RX are considered. Under state-of-the-art system settings, the RIS is shown to increase the symbol error rate link performance by 6 dB. When the performance is measured with coded bit error rate, the performance gain in simulated cases is 1 dB. The coverage enhancement is measured with the throughput as a function of the distance between the TX and RX. The distance at which the maximum possible throughput can be achieved is increased about 5%. The coverage can be further extended if a lower than the maximum throughput is accepted.

see all

Series: IEEE Vehicular Technology Conference
ISSN: 1090-3038
ISSN-L: 1090-3038
ISBN: 978-1-6654-1368-8
ISBN Print: 978-1-6654-1369-5
Pages: 1 - 5
DOI: 10.1109/VTC2021-Fall52928.2021.9625081
Host publication: 2021 IEEE 94th Vehicular Technology Conference (VTC2021-Fall)
Conference: IEEE Vehicular Technology Conference
Type of Publication: A4 Article in conference proceedings
Field of Science: 213 Electronic, automation and communications engineering, electronics
Funding: This research is partially funded by the Academy of Finland 6Genesis Flagship (grant 318927) and by InterDigital Europe, Ltd. This work has been developed also in part within the CELTIC-NEXT AIMM project.
Academy of Finland Grant Number: 318927
Detailed Information: 318927 (Academy of Finland Funding decision)
Copyright information: © 2021 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.