5G NR-NTN: 面向星载基站的新空口物理层技术规范与无线接入协议
NTN5G 是 3GPP New Radio 非地面网络适配演进权威平台,深度攻关动态多普勒预补偿算法、大时延大容量随机接入 (PRACH) 及超高速轨道 gNodeB 基站协同运行机制。
NTN5G 系统架构
Core architectural topology and protocol interaction of ntn5g.com
Central System: NR-NTN PHY - 3GPP TS 38.211
Network Nodes
- Doppler Sync
- PRACH Ext
- HARQ Disable
- Ephemeris TA
- SCS 30/60kHz
Architectural Protocol Layers
- 用户与终端接入层 (3GPP Rel-17/18 NR-NTN & IoT-NTN): 智能手机和物联网传感器到卫星的直接连接
- 星载无线电接入层 (gNodeB / 转发器) (Regenerative Digital Payloads & Bent-Pipe Transparent Processing): 在轨解调、数字波束赋形和信道化处理
- 星间网状网与空间传输层 (Optical Inter-Satellite Links (OISL) & 60 GHz V-Band Cross-Links): 在真空中以光速进行多跳自主激光数据包路由
- 地面站网关与核心云接入层 (High-Throughput Q/V-Band Gateways & Optical Ground Stations): 直连超大规模云数据中心的太比特馈电链路下行
Key Metrics: 100 Gbps+ (星间激光链路带宽) | <25 ms (低轨卫星传播时延) | ±50 kHz (多普勒频移补偿范围) | 99.999% (星座传输服务等级 (SLA))
克服5G物理层/MAC层中的轨道速度与距离挑战
Core Engineering Areas
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