面向6G卫星通信的语义通信技术展望

摘要：针对6G星地覆盖场景高动态、远距离、时变、资源有限等受限传输条件，实现基于语义通信的信息高效提取、信息可靠恢复及网络无缝覆盖扩展是有效路径。探讨了基于语义通信的卫星通信系统的链路结构，拓展了面向星地传输的语义通信的高效信息提取和可靠信息恢复方案，以增强星地传输能力。探索了基于语义通信的卫星中继方案的传输性能。认为未来应积极研究语义通信基础理论及关键技术，深挖语义通信对面向6G卫星通信的支撑作用，使基于语义通信的6G卫星通信系统赋能更多应用场景。

关键词：卫星通信；语义通信；语义中继；语义提取；覆盖扩展

Abstract: Given the highly dynamic, long-distance, time-varying, and resource-constrained transmission conditions in 6G satellite-terrestrial coverage scenarios, the efficient extraction of information, reliable information recovery, and effective network coverage extension based on semantic communication offer viable solutions. The link structure of satellite communication systems based on semantic communication is discussed. The efficient information extraction and reliable information recovery schemes for satellite-terrestrial transmission based on semantic communication are expanded to enhance transmission capabilities. The transmission performance of satellite relay schemes based on semantic communication is also investigated. We believe that future efforts should actively focus on studying the fundamental theories and key technologies of semantic communication, deeply exploring its supporting role in 6G satellite communications to empower more application scenarios for 6G satellite communication systems based on semantic communication.

Keywords: satellite communication; semantic communication; semantic relay; semantic extraction; coverage extension