Coverage analysis of dynamic TDD‐based downlink mmWave network with shadowed fading and BS heights

Abstract

In this study, the authors analyse the downlink (DL) performance of dynamic-time division duplexing (D-TDD) enabled millimetre-wave (mmWave) network with different base station (BS) heights using a channel model that incorporates the effect of shadowed fading. Modelling the combined effect of small and large (shadowing) scale fadings with k − μ shadowed fading, they provide a general framework based on stochastic geometry that comprehensively includes the smallest path loss BS association with either a line-of-sight (LoS) path or a non-LoS (NLoS) path. For the precise analysis of the network, they further consider different PL distributions for NLoS and LoS links which are associated with the 3D distance, blockage model that includes outage, and directional beamforming at the transmitter and the receiver. Specifically, they assume the directional beamforming at the transmitter and the receiver using scanning angle and number of antennas. Through simulation results, they first illustrate the performance efficiency of D-TDD over the static-TDD for DL mmWave networks. Later, they show the impact of k − μ shadowed fading parameters on the network performance under the both LoS and NLoS propagations, and only NLoS propagation. Next, the effect of BS heights on the coverage of the network is investigated to provide more insights on the performance in more realistic scenarios. Finally, the coverage of the network is analysed using the varying number of transmitting antennas, scanning angle and BS heights.