Joint Mode Selection and Resource Allocation in D2D Communications

What is it about?

The Problem of joint mode selection and resource allocation in in-band underlay device-to-device (D2D) communications. First, by using the closed-form expressions for the outage probability of both single-cell direct and relay-aided D2D communications in Rayleigh fading channel, a distance-based procedure is derived which introduces proper mode. Secondly, we optimally allocate the radio resources based on three schemes, minimizing the total outage probability, maximizing the total throughput, and maximizing the total diversity gain.

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Why is it important?

According to the numerical analyses, it is indicated that the Hungarian and Bipartite-matching (BP) algorithms offer the same results higher than the random algorithm. In addition, it is demonstrated that the optimization problem based on the diversity gain have the higher diversity gain compared to the others because it considers the outage probability and throughput in a joint manner. As a final remark, in the view of the diversity gain, the performance of the diversity gain-based scheme as well as the throughput-based scheme for amplify-and-forward (AF) and decode-and-forward (DF) scenarios are approximately the same.

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