Analysis of the Number of Activated Links and Mode Selection for Full-Duplex/Half-Duplex D2D-Aided Underlaying Cellular Networks

Abstract

With the rapid proliferation of intelligent terminals and exponential growth in mobile data traffic, existing wireless networks must significantly improve their spectral efficiency to meet current demands. Device-to-device (D2D) and Full-duplex (FD) communication are promising technologies for addressing low spectrum resource utilization and high data traffic demand. While introducing FD technology can greatly enhance the total data rate of D2D-aided cellular networks (CNs), it also brings about serious interference. We analyze the maximum and optimal number of D2D links (DLs) activations that a single channel can support, determining the proportion of half-duplex (HD) mode and FD mode in DLs by optimizing system throughput. Monte-Carlo simulation results show that we can determine the maximum and optimal number of active DLs while finding an optimal mode access ratio to achieve better total data rates. This value is influenced by various factors such as signal-to-interference-plus-noise ratio (SINR) threshold parameters and number of D2D users (DUs).