Certification Requirements for Devices Supporting Non-Terrestrial Networks (NTN)
Part of the Non-Terrestrial Network (NTN) Certification Hub
Overview of Non-Terrestrial Networks (NTN)
Non-Terrestrial Networks (NTN) extend 3GPP cellular connectivity beyond traditional terrestrial infrastructure by leveraging satellite-based platforms such as Low Earth Orbit (LEO), Medium Earth Orbit (MEO), and Geostationary Earth Orbit (GEO) systems. NTN enables connectivity in remote, rural, maritime, and airborne environments where terrestrial coverage is limited or unavailable.
3GPP has standardized NTN support beginning with Release 17, with continued enhancements in Release 18 and beyond, covering both NB-IoT and NR-based NTN use cases. While NTN devices often build upon existing cellular technologies, they introduce unique regulatory, RF, protocol, and certification challenges that must be addressed prior to commercialization.
Regulatory Certification Considerations
FCC Authorization (United States)
All NTN-capable devices marketed or operated in the United States must obtain FCC equipment authorization, typically under:
- FCC Part 2 – Equipment Authorization Procedures
- FCC Part 25 – Satellite Communications
- FCC Part 15 / Part 22 / Part 24 / Part 27 – Depending on spectrum usage and device class
Key considerations include:
- Spectrum allocation and service rules for satellite bands (e.g., L-band, S-band, Ku/Ka bands)
- Transmit power limits and EIRP compliance
- Out-of-band and spurious emissions
- Antenna characteristics, including electronically steerable or directional antennas
- RF exposure (SAR / MPE) assessments, especially for handheld or body-worn NTN devices
For hybrid devices supporting both terrestrial and NTN operation, coexistence and mode-specific compliance must be demonstrated.
3GPP Conformance and Protocol Requirements
Applicable 3GPP Specifications
NTN devices must comply with relevant 3GPP specifications, including but not limited to:
- 3GPP TS 38.821 / 38.822 – NTN architecture and solutions
- 3GPP TS 36.xxx / 38.xxx – NB-IoT or NR protocol stacks
- 3GPP TS 38.101 / 38.104 – RF requirements for NR
- 3GPP TS 36.101 / 36.104 – RF requirements for NB-IoT
Key NTN-specific protocol considerations include:
- Extended timing advance and round-trip delay
- Doppler shift compensation
- Modified random access procedures
- Enhanced mobility and handover handling
- Power optimization for long satellite link budgets
PTCRB Certification (for Applicable Technologies)
For NTN devices based on 3GPP cellular technologies intended for operation on North American networks, PTCRB certification may be required depending on the use case and operator.
Important considerations:
- PTCRB certification scope may be technology-dependent (e.g., NB-IoT NTN vs NR NTN)
- Additional NTN test cases may apply as PTCRB evolves to support satellite-based connectivity
- Device classification (terrestrial, hybrid, NTN-only) impacts test coverage
- Interoperability testing with satellite core network implementations
Because PTCRB requirements for NTN are still evolving, early engagement and gap analysis are critical to avoid certification delays.
GCF Certification (Global Market Access)
For devices targeting global or multi-region deployments, GCF certification is often required.
GCF considerations for NTN devices include:
- Support for Release 17+ NTN feature sets
- Validation of RF and protocol behavior under NTN-specific channel models
- Alignment with operator-defined NTN profiles
- Potential limitations on band combinations and deployment scenarios
NTN functionality may require careful scoping within the GCF certification declaration to avoid unnecessary or unsupported test cases.
RF and Antenna Certification Challenges
NTN devices introduce unique RF challenges not typically encountered in terrestrial cellular certification:
- High link budgets requiring elevated transmit power
- Directional or beam-steered antennas
- Satellite tracking and beam switching behavior
- Impact of Doppler and delay spread on RF performance metrics
Certification strategies often require:
- Customized test setups
- Careful antenna gain and pattern documentation
- Mode-specific RF evaluations (terrestrial vs NTN)
Carrier and Operator Acceptance
In addition to formal certifications, NTN devices may be subject to operator-specific acceptance processes, particularly when integrated with terrestrial networks or roaming agreements.
These may include:
- Network compatibility validation
- NTN-specific feature enablement approvals
- Field trials or limited commercial launches
- Compliance with operator NTN deployment constraints
Key Certification Risks and Mitigation Strategies
Common risks for NTN device certification include:
- Misalignment between regulatory approvals and 3GPP feature support
- Unclear applicability of PTCRB or GCF requirements
- Late identification of RF exposure or antenna issues
- Incomplete understanding of operator NTN expectations
Successful programs typically involve:
- Early certification roadmap development
- Cross-functional coordination between RF, protocol, and regulatory teams
- Proactive engagement with certification bodies and test labs
- Phased certification strategies aligned with deployment goals
Summary
While NTN leverages established cellular standards, certification for NTN-capable devices is not a simple extension of terrestrial certification. Regulatory approval, conformance testing, and operator acceptance must all be addressed with an NTN-specific strategy.
A well-planned certification approach helps device manufacturers:
- Reduce time to market
- Minimize re-testing and redesign
- Ensure global regulatory compliance
- Enable scalable NTN deployments
Related NTN Certification Guidance
Overview of regulatory, industry, and operator certification considerations for NTN devices