OISLGateway | Liaisons Descendantes Optiques Espace-Sol et Passerelles à Diversité de Nuages

OISLGateway relie les liaisons laser spatiales aux réseaux terrestres: optique adaptative contre les turbulences et stations distribuées contre la couverture nuageuse.

OISLGateway Space-to-Ground Optical Downlink Architecture

Direct-to-ground 100 Gbps laser transmission with real-time deformable mirror wavefront correction

Central System: LEO Satellite Optical Terminal - 1550nm downlink laser transmitter (5W)

Network Nodes

LEO Satellite Optical Terminal
Atmospheric Boundary Layer
Ground Optical Receiver (OGS)
Terrestrial Fiber PoP

Architectural Protocol Layers

Spaceborne PHY/MAC Layer (3GPP Rel-17 TS 38.300): Doppler compensation, HARQ disabling, and timing advance extension.
Orbital Mesh Routing (CCSDS / Delay-Tolerant Networking): Dynamic topology routing over intermittent laser crosslinks.
Regenerative Core Processing (OpenRAN / 3GPP CU-DU Split): Onboard user plane function (UPF) local breakout.

Key Metrics: < 18ms (LEO Orbit-to-Ground Roundtrip) | 100 Gbps (Optical Crosslink Throughput) | ±48 kHz (Doppler Shift Compensation) | 99.999% (Orbital Constellation Availability)

Liaisons Descendantes Optiques Espace-Terre, Optique Adaptative & Passerelles

Core Engineering Areas

Atmospheric Wavefront Adaptive Optics — Deformable mirrors operating at 5 kHz correcting wavefront phase distortions caused by thermal turbulence in the lower troposphere.
Weather-Aware Site Diversity Routing — Dynamic satellite routing selecting ground station downlinks with zero cloud coverage, ensuring 99.9% annual link availability.
Direct Free-Space to Single-Mode Fiber Coupling — Coupling open-air laser beams directly into standard 9-micron telecom fiber cores without intermediate optical-electrical conversion.

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