Hybrid Duplex Switching in Heterogeneous Networks

TL;DR

This paper introduces a hybrid-duplex switching scheme for heterogeneous networks that dynamically switches user duplex modes based on received power, optimizing spectral efficiency and sum rate.

Contribution

It proposes a novel hybrid-duplex scheme based on received power, formulates the mode switching as an optimization problem, and provides a greedy algorithm for practical implementation.

Findings

Hybrid-duplex scheme outperforms traditional half- and full-duplex schemes.

Theoretical analysis confirms spectral efficiency improvements.

Numerical simulations validate the effectiveness of the proposed algorithm.

Abstract

In this paper, a novel hybrid-duplex scheme based on received power is proposed for heterogeneous networks (HetNets). In the proposed scheme, the duplex mode (half- or full-duplex) of each user is switchable according to the received power from its serving base station (BS). The signal-to-interference-plus-noise-ratio (SINR) and spectral efficiency are analyzed for both downlink and uplink channels by using the tools of \emph{inhomogeneous} Poisson point process. Furthermore, determining power threshold for duplex mode switching is investigated for sum rate maximization, which is formulated as a nonlinear integer programming problem and a greedy algorithm is proposed to solve this problem. The theoretical analysis and the proposed algorithm are evaluated by numerical simulations. Simulation results show that the proposed hybrid-duplex scheme outperforms the half-duplex or full-duplex HetNet schemes.