NTN Stack: Vollständiger 3GPP Release 17/18 Protokollstapel für nicht-terrestrischen Funk

NTNStack ist die Engineering-Referenz für die Entwicklung, das Benchmarking und die Zertifizierung konformer 3GPP-NTN-Protokollstapel mit modularen C++- und Rust-Implementierungen für Endgeräte und orbitale gNodeBs.

NTNStack System Architecture

Core architectural topology and protocol interaction of ntnstack.com

Central System: NTN Radio Stack - 3GPP Rel-17/18

Network Nodes

NTN-PHY
NTN-MAC RACH
RLC 18-Bit SN
PDCP Huge Buff
RRC Orbit State

Architectural Protocol Layers

User & Terminal Access Layer (3GPP Rel-17/18 NR-NTN & IoT-NTN): Direct communication from smartphones and IoT sensors to satellites
Space-Borne Radio Access (gNodeB / Transponder) (Regenerative Digital Payloads & Bent-Pipe Transparent Processing): In-orbit demodulation, digital beamforming, and spectrum channelization
Inter-Satellite Mesh & Space Transport (Optical Inter-Satellite Links (OISL) & 60 GHz V-Band Cross-Links): Autonomous multi-hop laser packet routing in vacuum at the speed of light
Ground Teleport & Core Cloud Ingress (High-Throughput Q/V-Band Gateways & Optical Ground Stations): Terabit feeder link downlinks connected directly to cloud hyperscalers

Key Metrics: 100 Gbps+ (Optical Cross-Link Bandwidth) | <25 ms (LEO Propagation Latency) | ±50 kHz (Doppler Shift Compensation) | 99.999% (Constellation Transport SLA)

Modulare mehrschichtige Funksoftware für den Weltraum

Core Engineering Areas

Non-Terrestrial PHY & MAC Layers — Configuring preamble formats and frequency offsets to handle 1000km cell round-trip propagation times.
RLC & PDCP Sequence Extensions — Preventing sequence number wrap-around and pipeline stalling across high bandwidth-delay product links.
Open-Source NTN Stacks — Practical guide to standing up full software-defined radio testbeds with USRP SDRs and simulated channel emulators.

Technical Articles

Related Cluster Architecture Specifications

NonTerrestrialNetwork — 3GPP 5G/6G NTN Satellite Architecture, Direct-to-Cell & Non-Terrestrial Infrastructure
NonTerrestrialNetworks — Multi-Orbit Heterogeneous Constellation Interworking (LEO / MEO / GEO / HAPS)
AirspaceSync — Doppler Compensation, Relativistic Timing & Airspace-Space Synchronization
FSOComm — Free Space Optics, High-Bandwidth Space Laser Communications & Atmospheric Mitigation