Coexisting Terahertz and RF Finite Wireless Networks: Coverage and Rate Analysis

Abstract

Wireless communications over Terahertz (THz)band frequencies are vital enablers of ultra-high rate applications and services in sixth-generation (6G) networks. However, THz communications suffer from poor coverage because of inherent THz features such as high penetration losses, significant molecular absorption, and severe path loss. To surmount these critical challenges and fully exploit the THz band, we explore a coexisting radio frequency (RF) and THz finite indoor network in which THz small cells are deployed to provide high data rates, and RF macrocells are deployed to satisfy coverage requirements. Using stochastic geometry tools, we assess the performance of coexisting RF and THz networks and derive tractable analytical expressions for the coverage probability and average achievable rate. The analytical results are validated with Monte-Carlo simulations. Several insights are devised for accurate tuning and optimization of THz system parameters, including the THz bias, and the fraction of THz access points (APs) to deploy. The obtained results recognize a clear coverage/rate trade-off where a high fraction of THz AP improves the rate significantly but may degrade the coverage performance. Furthermore, the location of a user in the finite area highly affects the fraction of THz APs that optimizes its quality of service.

Coverage Analysis of Joint Localization and Communication in THz Systems With 3D Arrays

“…Under the considered system, good localization accuracy can be attained within a practical range of K r . 8 4) Localization Coverage Evaluation: Now, we evaluate the localization coverage of the 2D and 3D array configurations defined in (28) and (29). To this end, we randomize the UE position and orientation according to a uniform distribution, namely, x, y ∼ U(−10, 10), z ∼ U(0, 5), and α, β, γ ∼ U(0, 360), and collect PEB and OEB samples to obtain an empirical CDF.…”

“…The authors of [28] developed a novel framework characterizing the sensing and communication coverage probability and ergodic capacity in joint communication and sensing networks. For the coexisting radio frequency and THz finite indoor network, a coverage and rate analysis is reported in [29]. Although those works have developed rigorous and tractable models for networkwide performance analysis based on tools such as stochastic geometry, there is still a literature gap in 3D coverage analysis of specific deterministic scenarios involving joint localization and communication systems.…”

An Adaptive Bandwidth Management Algorithm for Next-Generation Vehicular Networks

“…Researchers have proposed deploying base stations in different frequency bands to overcome the transmission challenges of high-frequency base stations. Kouzayha et al [ 33 ] deployed THz base stations for high data rates and radio frequency base stations for coverage. Wang and Chun [ 34 ] introduced a hybrid network architecture that includes both THz and mmWave frequencies.…”