Optimization of Random Access Channel in NB-IoT

Ruki Harwahyu; Ray Guang Cheng; Chia Hung Wei; Riri Fitri Sari

doi:10.1109/JIOT.2017.2786680

Optimization of Random Access Channel in NB-IoT

Ruki Harwahyu, Ray Guang Cheng, Chia Hung Wei, Riri Fitri Sari

Department of Electrical Engineering

Research output: Contribution to journal › Article › peer-review

78 Citations (Scopus)

Abstract

Narrowband Internet of Things is a new access technology introduced by 3GPP. This paper presents an analytical model to estimate the access success probability and average access delay of the random access channels by considering maximum number of preamble transmissions, size of backoff windows, and number of subcarriers in each coverage enhancement levels. A joint optimization technique is proposed to configure the parameters to maximize the access success probability under a target delay constraint. The accuracy of the analysis and the effectiveness of the proposed optimization technique are verified by computer simulations and benchmarked with exhaustive search. The result shows that the proposed optimization is able to find the optimal configuration under various conditions.

Original language	English
Article number	8239592
Pages (from-to)	391-402
Number of pages	12
Journal	IEEE Internet of Things Journal
Volume	5
Issue number	1
DOIs	https://doi.org/10.1109/JIOT.2017.2786680
Publication status	Published - Feb 2018

Keywords

Multichannel slotted ALOHA
Narrowband Internet of Things (NB-IoT)

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10.1109/JIOT.2017.2786680

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title = "Optimization of Random Access Channel in NB-IoT",

abstract = "Narrowband Internet of Things is a new access technology introduced by 3GPP. This paper presents an analytical model to estimate the access success probability and average access delay of the random access channels by considering maximum number of preamble transmissions, size of backoff windows, and number of subcarriers in each coverage enhancement levels. A joint optimization technique is proposed to configure the parameters to maximize the access success probability under a target delay constraint. The accuracy of the analysis and the effectiveness of the proposed optimization technique are verified by computer simulations and benchmarked with exhaustive search. The result shows that the proposed optimization is able to find the optimal configuration under various conditions.",

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author = "Ruki Harwahyu and Cheng, {Ray Guang} and Wei, {Chia Hung} and Sari, {Riri Fitri}",

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AB - Narrowband Internet of Things is a new access technology introduced by 3GPP. This paper presents an analytical model to estimate the access success probability and average access delay of the random access channels by considering maximum number of preamble transmissions, size of backoff windows, and number of subcarriers in each coverage enhancement levels. A joint optimization technique is proposed to configure the parameters to maximize the access success probability under a target delay constraint. The accuracy of the analysis and the effectiveness of the proposed optimization technique are verified by computer simulations and benchmarked with exhaustive search. The result shows that the proposed optimization is able to find the optimal configuration under various conditions.

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Optimization of Random Access Channel in NB-IoT

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Keywords

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