Nexasphere Project

3D multi-path connectivity for the 6G era

NexaSphere is pioneering the next generation of connectivity through a 3D multi-path network of networks, integrating spaceborne, airborne, and terrestrial infrastructures. The project addresses the evolving needs of mobile transportation, smart cities, and connected communities, laying the technological foundation for Europe’s future 6G ecosystem.

As part of the Smart Networks and Services Joint Undertaking (SNS-JU) Phase 2, NexaSphere advances the integration of Terrestrial Networks (TN) and Non-Terrestrial Networks (NTN) into a unified, AI-orchestrated 3D architecture.

For more detailed information about the project, please visit the official NexaSphere website.

Project partners

Project focus

NexaSphere focuses on the design, development, and validation of a unified 3D communication architecture that enables seamless multi-connectivity across:

Satellite constellations (LEO & GEO)

Airborne platforms

Ground-based 5G and 6G networks

Wireless-optical technologies (FSO & LiFi)

Project overview

Motivation

Rapid expansion of LEO satellite constellations disrupting traditional GEO models
Evolution of 3GPP NTN framework for integrated satellite-terrestrial connectivity
Increasing demand for high-capacity, low-latency, and resilient connectivity
Growing need for resilient communication against congestion and disruption
Requirement for sustainable and energy-efficient network architectures
Emergence of 6G requiring AI-driven orchestration and edge-cloud integration

Objectives

Design and validate a 6G-based satellite network with onboard processing and storage capabilities
Define the technical specifications for a unified TN–NTN 3D communication architecture
Integrate RF and wireless-optical technologies (FSO & LiFi) within unified multi-path terminals
Enable sustainable, energy-efficient air-interface operations and terminal designs
Ensure seamless TN–NTN coexistence through advanced multi-path protocols (MPTCP, MPQUIC)
Implement AI-driven, self-adaptive orchestration and resource allocation across the network
Demonstrate TRL 5 end-to-end services for aviation, railway, and automotive sectors while contributing to European standardization and long-term 6G roadmaps

Vision

Establish a 3D Network of Networks integrating TN and NTN infrastructures
Enable native multi-path transmission and seamless multi-connectivity
Extend the edge-cloud continuum from ground to space
Empower mobile transportation, smart cities, and smart communities

Desired Results

Early-stage hardware prototypes and integrated software algorithms
Demonstration of the Radio & Wireless-Optical Connectivity Continuum
Scalable hardware-in-the-loop simulation models
Validated AI-based orchestration mechanisms
Proven 3D connectivity benefits for mobility verticals

Proof of concepts

Passenger aircraft flying above the clouds in a blue sky

Aviation

Black car driving along a highway with mountains in the distance

Automotive

Railway

LiFi Implementation in NexaSphere

aeroLiFi leads the design and prototyping of the LiFi-based access network and data transfer infrastructure for in-cabin connectivity and high-capacity gate data transfer

Design and prototyping of LiFi Access Points (APs) for user access

Integration of LiFi into IFEC systems and passenger devices using LiFi dongles

Adaptation of hardware, firmware, and software for aviation-grade performance

Integration of LiFi into a hybrid 5G/LiFi in-cabin network architecture

Development of high-capacity LiFi gate links for rapid aircraft data transfer during turnaround

Technical contribution to system integration and proof-of-concept demonstrations

Project sponsors

Flag of the European Union – project sponsor

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