Repetitions Versus Retransmissions: Tradeoff in Configuring NB-IoT Random Access Channels

• Published in: IEEE internet of things journal Vol. 6; no. 2; pp. 3796 - 3805
• Main Authors: Harwahyu, Ruki, Cheng, Ray-Guang, Tsai, Wan-Jung, Hwang, Jeng-Kuang, Bianchi, Giuseppe
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 01.04.2019; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: 3GPP; Delays; Internet of Things; Machine-to-machine communications; medium access control (MAC) protocols; Narrowband; Optimization; Performance evaluation; Random access; Repetition; Signal to noise ratio

Narrowband Internet of Things (NB-IoT) is a cellular standard supporting IoT applications in wide area. NB-IoT utilizes "repetition" to extend the coverage of the base station. The repetition value in NB-IoT physical random access channel (NPRACH) is set to ensure 99% detection probability...