Analytical Modeling of Mode Selection and Power Control for Underlay D2D Communication in Cellular Networks

TL;DR

This paper develops an analytical framework for underlay D2D communication in cellular networks, incorporating a novel mode selection scheme based on both D2D and cellular link distances, to optimize network performance.

Contribution

It introduces a new mode selection scheme considering both D2D and cellular link distances, enhancing the understanding of D2D impact on cellular network performance.

Findings

The proposed scheme improves spatial reuse and energy efficiency.

Analytical results guide optimal network parameter selection.

D2D communication can significantly offload traffic from cellular infrastructure.

Abstract

Device-to-device (D2D) communication enables the user equipments (UEs) located in close proximity to bypass the cellular base stations (BSs) and directly connect to each other, and thereby, offload traffic from the cellular infrastructure. D2D communication can improve spatial frequency reuse and energy efficiency in cellular networks. This paper presents a comprehensive and tractable analytical framework for D2D-enabled uplink cellular networks with a flexible mode selection scheme along with truncated channel inversion power control. Different from the existing mode selection schemes where the decision on mode selection is made based only on the D2D link distance (i.e., distance between two UEs using D2D mode of communication), the proposed mode selection scheme for a UE accounts for both the D2D link distance and cellular link distance (i.e., distance between the UE and the BS). The developed framework is used to analyze and understand how the underlaying D2D communication affects the cellular network performance. Through comprehensive numerical analysis, we investigate the expected performance gains and provide guidelines for selecting the network parameters.