An Energy Efficient D2D Model with Guaranteed Quality of Service for Cloud Radio Access Networks

TL;DR

This paper introduces an energy-efficient D2D communication model integrated with CRAN that guarantees QoS, utilizing spectrum selection and power minimization to significantly reduce power consumption.

Contribution

It proposes a novel spectrum and power control scheme for D2D-CRAN networks, including analytical derivations for link thresholds and power requirements.

Findings

Achieves nearly 50% power saving over traditional D2D networks.

Provides closed-form expressions for link distance thresholds.

Ensures guaranteed QoS with minimized transmit power.

Abstract

This paper proposes a spectrum selection scheme and a transmit power minimization scheme for a device-to-device (D2D) network cross-laid with a cloud radio access network (CRAN). The D2D communications are allowed as an overlay to the CRAN as well as in the unlicensed industrial, scientific and medical radio (ISM) band. A link distance based scheme is proposed and closed-form approximations are derived for the link distance thresholds to select the operating band of the D2D users. Furthermore, analytical expressions are derived to calculate the minimum required transmit power to achieve a guaranteed level of quality of service in each operating band. The results demonstrate that the proposed scheme achieves nearly 50% power saving compared to a monolithic (purely overlay or purely ISM band) D2D network.