Title: Narrowband internet of things: performance analysis of coverage enhancement in uplink transmission

Authors: Rasveen; Shilpy Agrawal; Khyati Chopra

Addresses: Department of Electronics and Communication, GD Goenka University, Gurugram, Haryana, India ' Department of Computer Science Engineering, GD Goenka University, Gurugram, Haryana, India ' Department of Computer Science Engineering, Jamia Hamdard, New Delhi, India

Abstract: Narrowband Internet of Things (NB-IoT) is a wireless standard and a novel technology for the IoT devices and applications. The extended coverage, low cost and long battery life make NB-IoT an excellent candidate for IoT applications. One of the primary goals of NB-IoT is to enhance coverage beyond the existing cellular technologies like General Packet Radio Service and Long-Term Evolution (GPRS and LTE). To accomplish this, the NB-IoT system utilises a repetition technique in which the same signal is repeated several times with different sub-carrier spacing in the uplink. We propose the repetition model with the optimisation algorithm, i.e., Moth Flame Optimisation (MFO). The optimisation reduces the Block Error Rate (BLER) even in the worst channel condition, which increases the performance evaluation in a single-tone and multi-tone transmission with sufficient transmission time, eventually increasing the radio coverage. The conducted evaluation showed that signal could be recovered even in low S/N, thereby providing better coverage.

Keywords: repetition; RU; resource unit; single-tone; multi-tone; coverage enhancement.

DOI: 10.1504/IJWMC.2022.127583

International Journal of Wireless and Mobile Computing, 2022 Vol.23 No.3/4, pp.220 - 230

Received: 13 Jan 2021
Accepted: 25 Jan 2022
Published online: 12 Dec 2022 *

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