Open 6G Stack

Open6G brings together service management, network orchestration and intelligent control across the RAN, Core and cloud infrastructure. Through SMO, RIC and OTAF, the stack enables lifecycle management, service deployment, policy and intent management, network slicing, configuration and closed-loop optimization across distributed network resources.

The orchestration layer is designed around open interfaces such as O1, A1 and E2, enabling network functions and applications from different projects to be managed as part of a common end-to-end environment.

• Network Slice Lifecycle
• SMO & RIC Integration
• O1 / A1 / E2 Interfaces
• Policy & Intent Management
• RAN & Core Configuration
• Closed-Loop Automation
• rApp & xApp Integration
• Network Lifecycle Management

CNTC turns 3GPP and security requirements into automated tests, graded verdicts and auditable certificates for telecom network functions. It drives the network function through its real interfaces, observes the behaviour on the wire, and evaluates the results against a versioned requirements catalogue.

CNTC currently covers the 5G UPF and Core Control Plane, with RAN certification now available and SMO, RIC and end-to-end O-RAN certification on the roadmap.

• 3GPP Standards-Based Testing
• Automated Conformance Testing
• UPF / 5G User Plane
• 5G Core Control Plane
• RAN Certification
• SCAS Security Testing
• Automated Certificates
• Reproducible Testing
• End-to-End O-RAN Certification

Open6G brings AI directly into the RAN scheduler, enabling per-UE intelligence, predictive link adaptation and dynamic scheduling based on real-time network conditions. Building on TOSSI's OCUDU AI-RAN framework, the stack supports ML-based MCS selection, BSR prediction and CSI prediction, while extending intelligent scheduling towards different network slices with dynamically changing performance requirements and priorities.

The approach combines offline training, lightweight in-RAN inference, live model updates and safe fallback to conventional scheduling.

• ML-Based Link Adaptation
• Predictive CSI
• Intelligent Scheduling
• Dynamic Slice-Aware Scheduling
• eMBB / URLLC / mMTC Optimization
• Real-Time RAN Inference
• Traffic-Aware Scheduling
• Closed-Loop Optimization
• Online Model Updates

The Open NTN Testbed provides an open, software-based environment for developing and validating 3GPP NTN technologies across an end-to-end 5G network. It combines open-source RAN, UE and 5G Core components with satellite channel modelling for GEO and LEO scenarios, enabling evaluation of propagation delay, Doppler, timing, mobility and handover without requiring dedicated satellite infrastructure.

• 3GPP Release 17 NTN
• GEO & LEO Scenarios
• Satellite Channel Modelling
• Dynamic Propagation & Doppler
• NTN Timing & Synchronization
• Ephemeris & SIB19
• NTN Mobility & Handover
• End-to-End 5G SA Testing
• Software-Based & Reproducible
• Terrestrial-Satellite Integration

Open6G extends AI agents beyond server operations into the telecom network stack, giving agents a verifiable identity and controlled authority to interact with RAN, Core, SMO, applications and infrastructure.

The approach uses cryptographic identity, proof-of-possession, policy-based authorization, delegated permissions and revocation so that every agent action can be authenticated and evaluated before it reaches a network function.

• Verifiable AI Agent Identity
• Cryptographic Authentication
• Proof-of-Possession
• Parameter-Level Policies
• Real-Time Revocation
• Policy-Based Access Control
• Secure RAN & Core Operations
• Agent-to-Agent Trust
• AI-Native Network Automation

The Open ISAC Testbed adds sensing capabilities to an open 5G NR network by using the same communication signals for sensing. It combines O-RAN radio components, a dedicated sensing receiver, SDR hardware and a shared time reference to capture and process signals reflected from the environment.

The current testbed demonstrates pseudo-monostatic sensing using CSI-RS signals. It extracts range and Doppler information from the received signals and generates live range-Doppler maps for detecting and tracking moving objects. The setup can be extended to monostatic, bistatic and multistatic sensing, as well as LOS and NLOS detection and different ISAC antenna designs.

• 5G NR CSI-RS Sensing
• Pseudo-Monostatic Sensing
• Range & Doppler Estimation
• Live Range-Doppler Mapping
• LOS & NLOS Detection
• Monostatic, Bistatic & Multistatic Sensing
• O-RAN Radio Integration
• ISAC Node Antenna Design
• Open & Reproducible Testbed

Open6G addresses practical interoperability gaps across the telecom stack through three open bridges.

xFAPI enables interoperability between RAN L1 and L2 implementations by adapting differences in FAPI, transport and runtime behaviour, with integrations demonstrated across OAI, OCUDU and NVIDIA Aerial.

SETU connects the 5G Core with IMS platforms such as Kamailio by bridging IMS interfaces with 5G Core service interfaces, enabling voice, video and messaging over 5G SA.

HEXAeBPF provides a programmable bridge for user-plane and control-plane integration, supporting flexible composition and cloud-native deployment of network functions.

• L1-L2 Interoperability
• FAPI Translation
• Transport & Runtime Adaptation
• Multi-Vendor RAN Integration
• OAI ↔ OCUDU Integration
• NVIDIA Aerial ↔ OCUDU Integration
• Core-IMS Interworking
• User- & Control-Plane Integration
• Cloud-Native Network Integration
• End-to-End Validation

Open6G integrates post-quantum security across the telecom stack, covering the RAN, 5G Core, network interfaces and identity infrastructure. The approach combines post-quantum cryptography, secure PKI, protected network interfaces and crypto-agility to help networks transition to quantum-resistant security without disrupting existing deployments.

The architecture also supports secure key and certificate lifecycle management, algorithm migration and security monitoring, providing a flexible foundation for evolving security requirements across open and cloud-native telecom networks.

• Post-Quantum Cryptography
• ML-DSA & PQ Signatures
• PQ-Secured RAN & Core
• Post-Quantum PKI
• Secure Key & Certificate Lifecycle
• PQ-Secure Network Interfaces
• IPsec & Secure Core Signalling
• Identity & Trust
• Security Monitoring & Threat Detection

Open6G brings RISC-V into the telecom stack as an open and customizable computing platform for RAN, core and edge networks.

The approach combines open RISC-V cores, vector and AI acceleration, custom instructions and hardware-software co-design with an open community ecosystem. Through Open RISC-V, developers can build, integrate and validate telecom-focused hardware, software and accelerators on shared open platforms, enabling a more flexible and interoperable foundation for future networks.

• Open RISC-V Cores
• Telecom-Focused SoCs
• Vector & DSP Acceleration
• AI / ML Acceleration
• Custom ISA Extensions
• Hardware-Software Co-Design
• Open Software & Toolchains
• Open Hardware Designs
• Telecom Testbeds & Validation

Creating digital representations of network and radio environments to evaluate configurations, algorithms and new technologies before deployment.

The platform supports 3D simulation of the whole stack, integrating Sionna RT ray-traced propagation with NTN scenarios and AI-RAN data collection, so changes can be tested against a deterministic, repeatable channel.

• Ray-Traced Propagation
• Sionna RT Integration
• Deterministic Channel Modelling
• Repeatable Experiments
• NTN Scenario Modelling
• AI-RAN Data Collection
• Pre-Deployment Evaluation
• 3D Environment Simulation