Semi-Orthogonal Random Access for mMTC in Massive MIMO Systems 


Vol. 46,  No. 7, pp. 1164-1172, Jul.  2021
10.7840/kics.2021.46.7.1164


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  Abstract

As the number of Machine Type Communication Devices (MTCDs) is rapidly increasing in Fifth Generation (5G) and Sixth Generation (6G) systems, it is expected that a large number of MTCDs will simultaneously attempt to connect to the next generation Node B (gNB). In such a mMTC environment, the number of preamble collisions where two or more MTCDs select the same preamble will increase, leading to the reduced connection success rate and increased latency. In this paper, in order to reduce the probability of preamble collision, we propose a Semi-Orthogonal Random Access (SORA) where each MTCD transmits its Radio Resource Control (RRC) connection request through Semi-Orthogonal Multiple Access (SOMA) using the properties of the massive Multiple-Input Multiple-Output (MIMO) system. We provide the detailed signaling procedures for each step between the MTCDs and the gNB, and through simulation, we show that SORA achieves a higher access success rate in the mMTC environment compared with the existing techniques.

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  Cite this article

[IEEE Style]

D. Kim, S. Moon, J. Lee, "Semi-Orthogonal Random Access for mMTC in Massive MIMO Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 46, no. 7, pp. 1164-1172, 2021. DOI: 10.7840/kics.2021.46.7.1164.

[ACM Style]

Dowu Kim, Seokjae Moon, and Jang-Won Lee. 2021. Semi-Orthogonal Random Access for mMTC in Massive MIMO Systems. The Journal of Korean Institute of Communications and Information Sciences, 46, 7, (2021), 1164-1172. DOI: 10.7840/kics.2021.46.7.1164.

[KICS Style]

Dowu Kim, Seokjae Moon, Jang-Won Lee, "Semi-Orthogonal Random Access for mMTC in Massive MIMO Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 46, no. 7, pp. 1164-1172, 7. 2021. (https://doi.org/10.7840/kics.2021.46.7.1164)

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pISSN : 1226 - 4717
eISSN : 2287 - 3880