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According to the recently published IEEE standard 802.15.3d (2017), THz links operating at 300 GHz are viable to achieve more than 100 Gbit s−1 of data rate. This feature can support a transition of the future backhaul connectivity from the underground fibre connection to the wireless, where fibre links are not available or too costly to install. The EU-Japan Horizon 2020 project “ThoR” is working towards the demonstration of such links. A detailed investigation on the influence of weather conditions will help to derive planning guidelines of 300 GHz backhaul links for forthcoming applications. This paper focuses on the dependency of the THz link on the general weather by using ray-tracing simulation. Simulation is conducted combining ITU-R propagation models for atmospheric attenuation (water vapour and oxygen content of air, droplets of rains, liquid content of clouds or fog), a wind-depending swaying model for the antenna poles, and historical measured climate data for the deployment scenarios considered in the ThoR project. As a result, this research will show the feasibility of THz link in outdoor applications under general weather conditions, defines weather-dependent outage probabilities, and allows us to derive planning guidelines of THz links at a frequency of 300 GHz.

In 5G and Beyond networks the ultra-densification of networks will require ultra-high backhaul capacities for a very large number of base station locations, especially in urban areas. Since fibre connections will not be available everywhere, the use of spectrum at 300 GHz and beyond might enable the complementary use of wireless backhaul solutions to nearby fibre connected hubs. In some cases a line-of-sight connection is not available and the backhaul connection might be realized using one refection. In this paper a planning algorithm is presented, which automatically identifies possible wireless links taking into account none-line-of-sight connections in backhaul networks arranged in star topology., 2021 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)

One of the goal of the EU-Japan joint project ThoR is to demonstrate the feasibility of the IEEE Standard 802.15.3d-2017 for backhaul/fronthaul links. This will be done in a realistic deployment scenario using both system-level and link-level simulations integrated in the same tool. Based on the system-level simulations, a wireless backhaul network for a given ultra-dense mobile network is automatically planned and analyzed. Exemplary links are then simulated using the link-level simulations. Preliminary results of both simulations are presented from a scenario in Hanover, Germany and showing the achievability of >100 Gbit/s data rate fully considering the current IEEE Std 802.15.3d-2017., 2020 International Symposium on Antennas and Propagation (ISAP)

The need for high data rates of several Gbit/s in 5G and beyond wireless networks will require capacities of 100 Gbit/s in the backhaul and fronthaul links. 300 GHz wireless links are promising candidates to provide these links. The paper describes the ongoing activities in the EUJapan project ThoR towards suitable propagation and channel models applicable for the simulation and planning of such links. The corresponding modelling activities are based on ray tracing models, which are enhanced by taking into account atmospheric propagation effects, measured characteristic of building materials and the effect of wind to the poles, where the antennas are mounted. First results applied to realistic simulation scenarios are presented.

The IEEE Standard 802.15.3d defines a communication systems allowing wireless solutions for backhaul links operating at 300 GHz with data rates of 100 Gbit/s and beyond. The European Horizon 2020 ThoR project works towards the demonstration of such a solution. One of the goals of ThoR is to develop algorithms for automatic planning of 300 GHz backhaul links and the derivation of planning guidelines. In this paper, an automatic algorithm for the planning of 300 GHz backhaul links using 3D ray tracing taking into account atmospheric effects is presented. The influence of both the applied antennas and the weather conditions are evaluated for an automatically planned network by using a realistic scenario of an ultra-dense network in the city of Hannover.