Analytical Assessment of Coordinated Overlay D2D Communications

TL;DR

This paper provides an analytical framework for overlay D2D communications under cellular-assisted scheduling, demonstrating improved system performance through optimized parameters and validated by simulations.

Contribution

It introduces an analytical approach using stochastic geometry for overlay D2D systems with coordinated scheduling, enabling performance evaluation and optimization.

Findings

Coordinated scheduling improves average user rate.

Analytical expressions accurately match simulation results.

Optimized parameters enhance D2D link distance and system throughput.

Abstract

In this paper, analytical assessment of overlay-inband device-to-device (D2D) communications is investigated, under cellular-network-assisted (coordinated) scheduling. To this end, a simple scheduling scheme is assumed that takes into account only local (per cell) topological information of the D2D links. Stochastic geometry tools are utilized in order to obtain analytical expressions for the interferers density as well as the D2D link signal-to-interference-ratio distribution. The analytical results accuracy is validated by comparison with simulations. In addition, the analytical expressions are employed for efficiently optimizing the parameters of a cellular system with overlay D2D communications. It is shown that coordinated scheduling of D2D transmissions enhances system performance both in terms of average user rate as well as maximum allowable D2D link distance.