Analysis of D2D Utility Function with the Interference Majorization

Oh Chang Yoon

doi:https://doi.org/10.9708/jksci.2020.25.07.075

Journal of The Korea Society of Computer and Information

Abbr : JKSCI
2020, 25(7), pp.75-83
DOI :https://doi.org/10.9708/jksci.2020.25.07.075
Publisher : The Korean Society Of Computer And Information
Research Area : Computer Science

Oh Chang Yoon ¹

¹ 인하공업전문대학

ABSTRACT

We consider the D2D utility optimization problem in the cellular system. More specifically, we develop a concave function decision rule which reduces the complexity of non-convex optimization problem. Typically, utility function, which is a function of the signal and the interference, is non-convex. In this paper, we analyze the utility function from the interference perspective. We introduce the ‘relative interference’ and the ‘interference majorization’. The relative interference captures the level of interference at D2D receiver’s perspective. The interference majorization approximates the interference by applying the major interference. Accordingly, we propose a concave function decision rule, and the corresponding convex optimization solution. Simulation results show that the utility function is concave when the relative interference is less than 0.1, which is a typical D2D usage scenario. We also show that the proposed convex optimization solution can be applied for such relative interference cases.
KEYWORDS

Concave , Convex , D2D , Relative Interference , Interference Majorization
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KCI Citation (1)

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