Overview

The Aerial Omniverse Digital Twin consists of the following components:

• User interface

• ClickHouse

• Omniverse Nucleus

• Scene importer

• RAN digital twin interconnected as illustrated in the following figure.

The graphical interface offers the possibility of visualizing and interacting with the scenario, as well as parametrizing, starting, interrupting and stopping simulations.

The results produced by the Aerial Omniverse Digital Twin are stored in an SQL database hosted by the ClickHouse server. Correspondingly, they can be access through ClickHouse clients.

The Nucleus server delivers message brokering services and provisions the scene geometry to the other components. In all cases, the Nucleus server needs to be on a node whose IP address can be reached by the other components. This requires having the ports described here open.

The Nucleus server stores and distributes the scene geometry in the OpenUSD format. The scene importer takes in geospatial data in CityGML format and creates the OpenUSD assets needed by the Nucleus server to represent a given scene.

The actual radio access network (RAN) digital twin is in charge of

• updating the positions of a population of terminals,

• scheduling the transmission of data from all of the deployed radio units to all of the terminals,

• computing the channel frequency response for all of the links - where a link is here intended as a wireless connection between two antenna elements - described in the scene under investigation,

• generating the waveforms at the transmission point of every link,

• applying the calculated frequency response, interference and noise to said waveforms, thus creating the final signal observed at the reception point of every link,

• applying the necessary signal processing to extract and decode the transmitted data.