【CCF-AIR青年基金】高性能卫星通信技术研究 Research on High Performance Satellite Communication

Research Themes




Satellite communication is considered an essential component of 6G communication techniques. Ground user terminals transmit data directly to satellites, which then deliver data to remote ground stations for access to the Internet. Satellites work atop the ground with a distance of hundreds to tens of thousands of kilometers, and have the potential to provide communication services to global areas including oceans, lakes, deserts, mountains, etc.


Recently, Low Earth Orbit (LEO) satellite constellations such as Starlink or OneWeb are thriving. Compared with traditional Geosynchronous Equatorial Orbit (GEO) satellites, LEOs are much closer to the ground and can provide higher network bandwidth and lower transmission latency. These two features can support bandwidth-intensive applications (e.g. high-fidelity video transfer) and latency-sensitive applications (e.g. remote telephony, remote device operation).


To fully exploit the bandwidth and latency advantages of LEO satellites and provide good application performance, we should address two major problems.


First, traditional satellite communication depends on the Digital Video Broadcasting (DVB) protocol defined by the European Telecommunications Standards Institute (ETSI). DVB is widely used in GEO communication. However, the modulation and coding scheme (MCS) in DVB is either fixed and unadjustable, or pursuing low Bit Error Rate (BER) by dynamically degrading the modulation order and increasing redundancy ratio. When used in LEO communication, DVB may fail to adapt to the high dynamics of the wireless channels, thus being unable to actually deliver the high bandwidth and low latency features of LEO.


Second, LEO satellites can carry multiple types of applications with different performance requirements. With respect to latency, applications like real-time financial trading or remote telephony demand low network latency. On the other hand, applications like high fidelity video transfer require high network bandwidth. Diverse application performance requirements bring challenges to the transport layer design for satellite communication.


  • An MCS scheme designed for LEO satellite communication, which can adapt to channel dynamics and fully deliver the bandwidth and latency features of LEO
  • An application performance-aware transport layer, which can adjust transport algorithms and channel codec strategies according to diverse application performance requirements

  • 适用于低轨卫星通信的信道调制解调及编码机制(MCS),适配低轨卫星信道的动态性,充分发挥低轨卫星大带宽、低延时特性
  • 应用性能可感知的传输层技术,能够面向不同性能需求的应用,调整传输层算法和信道编码策略及参数

Related Research Topics

  • Communication protocol designed for LEO satellites
  • Modulation and demodulation method that can adapt to LEO dynamics
  • Channel coded strategy that can adapt to LEO dynamics
  • Congestion control algorithm for LEO satellite communication
  • Prototype implementation based on Software-defined Radio (SDR)
  • Audio/Video transmission techniques

  • 面向低轨卫星的通信协议
  • 适配低轨卫星动态性的调制解调方法
  • 适配低轨卫星动态性的信道编码策略
  • 面向低轨卫星的拥塞控制(CC
  • 软件定义无线电(SDR)实现
  • 音视频传输技术

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