NTNDirect: 비개조 스마트폰을 위한 다이렉트 투 셀(D2D) 우주 통신 인프라

NTNDevice는 우주에 거대 위상배열 안테나를 배치하여 저궤도 위성을 기존 일반 스마트폰을 위한 표준 3GPP 기지국으로 변환하는 Direct-to-Cell 표준 수립.

NTNDirect Giant Spaceborne Phased Array Direct-to-Cell Architecture

64-square-meter orbital aperture projecting thousands of dynamic cellular micro-beams

Central System: Standard Commercial Smartphone - Unmodified LTE/5G phone transmitting at standard power (+23 dBm)

Network Nodes

  • Standard Commercial Smartphone
  • 64 m² Space Phased Array
  • Onboard Regenerative gNodeB
  • Mobile Network Operator (MNO) Core

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)

Direct-to-Cell(D2D) 위성 통신, 기존 비개조 스마트폰 직접 연결 및 글로벌 커버리지

Core Engineering Areas

Technical Articles

Related Cluster Architecture Specifications