Analysis of User Association Impact on User-Centric Cell-Free Massive MIMO 


Vol. 45,  No. 11, pp. 2014-2021, Nov.  2020
10.7840/kics.2020.45.11.2014


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  Abstract

In this paper, the system performance according to the number of users associated with each AP is analyzed when the user-centric method, which is one of the cell-free massive MIMO, is applied. The cell-free massive MIMO scheme has the advantage of providing a uniform data rate to users in the service area by distributing multiple antennas over a large area. However, in order to take advantage of this, there are disadvantages such as high capacity required in the front-haul between each AP and the central processing unit. In order to improve this, the user-centric method has been proposed to transmit signals only to a certain number of users and reduce the load of front-haul, showing similar performance to the cell-free scheme. In this paper, by analyzing the overall system performance according to the number of users connected to each AP in the user-centric method, the total system throughput and the throughput deviation between users are evaluated. In addition, the performance reduction of user-centric cell-free massive MIMO compared to general cell-free massive MIMO is analyzed for the high and low user density environments and factors to be considered for system optimization are presented.

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  Cite this article

[IEEE Style]

J. Lee, Y. Kim, H. Ahn, E. Hong, "Analysis of User Association Impact on User-Centric Cell-Free Massive MIMO," The Journal of Korean Institute of Communications and Information Sciences, vol. 45, no. 11, pp. 2014-2021, 2020. DOI: 10.7840/kics.2020.45.11.2014.

[ACM Style]

Je-Woo Lee, Young-Min Kim, Hee-Jun Ahn, and Een-Kee Hong. 2020. Analysis of User Association Impact on User-Centric Cell-Free Massive MIMO. The Journal of Korean Institute of Communications and Information Sciences, 45, 11, (2020), 2014-2021. DOI: 10.7840/kics.2020.45.11.2014.

[KICS Style]

Je-Woo Lee, Young-Min Kim, Hee-Jun Ahn, Een-Kee Hong, "Analysis of User Association Impact on User-Centric Cell-Free Massive MIMO," The Journal of Korean Institute of Communications and Information Sciences, vol. 45, no. 11, pp. 2014-2021, 11. 2020. (https://doi.org/10.7840/kics.2020.45.11.2014)

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