1、Table of Contents1 INTRODUCTION.12 DEMAND AND VISION.32.1 Demand.32.2 Vision.43 DEVELOPMENT STATUS OF INTEGRATED SPACE-GROUND NETWORK.63.1 Satellite Communication.63.1.1 Satellite Communication System.63.1.2 Standard System.163.1.3 Technical Route of Satellite Communication System.173.1.4 Satellite

2、System Service Operations.203.2 Terrestrial Communication.224 KEY TECHNOLOGIES OF 5G NTN.274.1 Network Architecture.274.2Air Interface Transmission Technology.314.2.1 Synchronization Technology.314.2.2 Timing Management.324.2.3 Coverage.334.2.4 System Capacity.354.2.5 Beam Management.364.2.6 Mobilit

3、y.404.3 Security Technology.424.4 Satellite Implementation Technology.434.5 Terminal Implementation Technology.484.6 Testing Technology.515 5G NTN INDUSTRY DEVELOPMENT AND PRACTICE.555.1 5G NTN Standard Development.555.2Application Scenarios.605.2.1 Direct Connection of Mobile Phones to Satellites.6

4、05.2.2 Internet of Things.615.2.3 Internet of Vehicles.625.2.4 BroadbandAccess.635.3 Practical Exploration of Voice Technology Based on 5G NTN.645.3.1 Scenarios and demand.645.3.2 GEO-based IoT NTN Voice Services.655.3.3 Summary of Practices.816 DEVELOPMENT AND EVOLUTION OF 6G INTEGRATED SPACE-GROUN

5、D.826.1 5G NTN Limitations.836.2 Core Challenges of 6G Space-ground Integration.846.3 Key Technologies of 6G Space-ground Integration.866.3.1 New Network Architecture.866.3.2 NewAccess Technologies.876.3.3 Positioning Enhancement.1056.3.4 RIS-assisted Satellite-terrestrial Communication.1066.3.5 Edg

6、e Collaboration Computing Technologies.1086.3.6 Inter-satellite Multi-path Routing Transmission.1126.3.7 Network O&M and Service Management.1146.3.8 Network Security.1196.3.9 Satellite Technology.1206.3.10 Terminal Technology.1226.3.11 Testing Technology.1236.4 Evolution Route Forecast of 6G Space-g