Spectral Efficiency Analysis of Uplink-Downlink Decoupled Access in C-V2X Networks

TL;DR

This paper develops an analytical framework using stochastic geometry to evaluate spectral efficiency in uplink-downlink decoupled access for C-V2X networks, demonstrating improved system performance.

Contribution

It introduces a unified analytical model for UL/DL decoupled access in C-V2X, incorporating Cox process modeling and stochastic geometry, with validation through simulations.

Findings

Decoupled access improves spectral efficiency in C-V2X.

The analytical model accurately predicts association probabilities and distance distributions.

Simulations confirm the effectiveness of decoupled access in enhancing system performance.

Abstract

The uplink (UL)/downlink (DL) decoupled access has been emerging as a novel access architecture to improve the performance gains in cellular networks. In this paper, we investigate the UL/DL decoupled access performance in cellular vehicle-to-everything (C-V2X). We propose a unified analytical framework for the UL/DL decoupled access in C-V2X from the perspective of spectral efficiency (SE). By modeling the UL/DL decoupled access C-V2X as a Cox process and leveraging the stochastic geometry, we obtain the joint association probability, the UL/DL distance distributions to serving base stations and the SE for the UL/DL decoupled access in C-V2X networks with different association cases. We conduct extensive Monte Carlo simulations to verify the accuracy of the proposed unified analytical framework, and the results show a better system average SE of UL/DL decoupled access in C-V2X.