Ground-to-Air Communications Beyond 5G: Coordinated Multi-Point Transmission Based on Poisson-Delaunay Triangulation

TL;DR

This paper introduces a novel ground-to-air communication scheme for UAVs using Poisson-Delaunay triangulation and dynamic frequency allocation, improving connectivity, handoff, and coverage performance over traditional methods.

Contribution

It proposes a geometry-based CoMP transmission scheme and a circle packing frequency allocation for UAV communication, reducing overhead and enhancing reliability.

Findings

Outperforms conventional CoMP in handoff and coverage probabilities.

Reduces feedback overhead by fixing UAV-CoMP BS sets.

Provides exact performance evaluation through analytical modeling.

Abstract

This paper designs a novel ground-to-air communication scheme to serve unmanned aerial vehicles (UAVs) through legacy terrestrial base stations (BSs). In particular, a tractable coordinated multi-point (CoMP) transmission based on the geometry of Poisson-Delaunay triangulation is developed, which provides reliable and seamless connectivity for UAVs. An effective dynamic frequency allocation scheme is designed to eliminate inter-cell interference by using the theory of circle packing. For exact performance evaluation, the handoff probability of a typical UAV is characterized, and then the coverage probability with handoffs is attained. Simulation and numerical results corroborate that the proposed scheme outperforms the conventional CoMP scheme with three nearest cooperating BSs in terms of handoff and coverage probabilities. Moreover, as each UAV has a fixed and unique CoMP BS set, it avoids the real-time dynamic BS searching process, thus reducing the feedback overhead.