Power Allocation Method for Multi-User MIMO Downlink Systems with Individual Statistical Delay Constraints 


Vol. 44,  No. 9, pp. 1648-1657, Sep.  2019
10.7840/kics.2019.44.9.1648


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  Abstract

In this paper, we propose an novel power allocation algorithm for multi-user multiple-input multiple-output (MU-MIMO) downlink systems with individual statistical delay constraints. Many studies on the power allocation methods for the MU-MIMO downlink systems considering physical layer channel already have been performed to improve the communication system performance such as spectral efficiency or energy efficiency. However, the existing power allocation methods are difficult to be used for practical communication systems since several cases that selected multiple users have different communication applications and they have different network traffic have not been considered. Therefore, in this paper, we propose a novel power allocation scheme in order to improve the communication performance when multiple users have different delay constraints by using novel performance metric, effective capacity, which includes the effect of the delay outage probability in the link layer. We consider the effective capacity and effective energy efficiency that are spectral efficiency and energy efficiency with delay constraints, respectively, as performance metrics to be improved. We propose spectral efficient and energy efficient power allocation methods using the point that effective capacity is a convex function for an allocated power and demonstrate our proposed methods by simulation.

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  Cite this article

[IEEE Style]

J. Kwon and Y. Ko, "Power Allocation Method for Multi-User MIMO Downlink Systems with Individual Statistical Delay Constraints," The Journal of Korean Institute of Communications and Information Sciences, vol. 44, no. 9, pp. 1648-1657, 2019. DOI: 10.7840/kics.2019.44.9.1648.

[ACM Style]

Jae-Hong Kwon and Young-Chai Ko. 2019. Power Allocation Method for Multi-User MIMO Downlink Systems with Individual Statistical Delay Constraints. The Journal of Korean Institute of Communications and Information Sciences, 44, 9, (2019), 1648-1657. DOI: 10.7840/kics.2019.44.9.1648.

[KICS Style]

Jae-Hong Kwon and Young-Chai Ko, "Power Allocation Method for Multi-User MIMO Downlink Systems with Individual Statistical Delay Constraints," The Journal of Korean Institute of Communications and Information Sciences, vol. 44, no. 9, pp. 1648-1657, 9. 2019. (https://doi.org/10.7840/kics.2019.44.9.1648)

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pISSN : 1226 - 4717
eISSN : 2287 - 3880