Performance Analysis of Joint Pairing and Mode Selection in D2D Communications with FD Radios

TL;DR

This paper develops an analytical framework using stochastic geometry to evaluate mode selection and pairing in D2D cellular networks with FD radios, showing FD-D2D improves throughput despite self-interference.

Contribution

It introduces a novel stochastic geometry-based model for joint mode selection and pairing in D2D networks with FD radios, highlighting the benefits of FD over HD.

Findings

FD-D2D achieves higher system throughput than HD-D2D.

Bias factor influences individual mode throughput but not total system throughput.

FD-D2D offers higher coverage probability despite self-interference.

Abstract

In cellular-D2D networks, users can select the communication mode either direct and form D2D links or indirect and communicate with BS. In former case, users should perform pairing selection and choose their pairs. The main focus in this paper is proposing an analytical framework by using tools from stochastic geometry to address these two issues, i.e. i) mode selection for the user devices to be established in either cellular or D2D mode, which is done based on received power from BS influenced by a bias factor, and ii) investigation of choosing nth-nearest neighbor as the serving node for the receiver of interest, by considering full-duplex (FD) radios as well as half- duplex (HD) in the D2D links. The analytic and simulation results demonstrate that even though the bias factor determines the throughput of each mode, it does not have any influence on the system sum throughput. Furthermore, we demonstrate that despite of suffering from self-interference, FD-D2D results in higher system sum throughput as well as higher coverage probability in comparison to its counterpart, namely purely HD- D2D network.