NTNDirect: 手机直连卫星空间基础设施与常规未修改智能手机卫星接入

NTNDirect 制定终端直连卫星 (D2D) 顶层技术规范，在低轨部署超大口径相控阵天线帆板，将太空卫星直接虚拟为标准 3GPP 蜂窝基站，无缝连接全球存量未经任何改造的普通智能手机。

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)

终端直连卫星 (Direct-to-Cell / D2D)、存量未经改造大众手机直射天基与全球泛在覆盖

Core Engineering Areas

Technical Articles

Related Cluster Architecture Specifications