星地一体化语义通信网络：探索与展望

摘要：围绕星地一体化网络中的语义通信，系统综述了其架构设计、关键技术与建模框架，并针对路由与资源管理等问题展开探讨。面向星地链路长时延、强多普勒频移及星上算力受限等约束条件，提出了任务驱动的语义传输机制与鲁棒联合源信道编码策略，同时探讨了多模态语义处理及知识库在线更新等关键问题。通过构建以语义意图与重要性感知为核心的跨层协同机制，形成了面向星地场景的统一通信架构与可演进技术路线，为该领域未来发展提供了理论支撑与系统指引。

关键词：星地一体化网络；语义通信；智能化网络；联合源信道编码；大模型

Abstract: A systematic survey of semantic communications within integrated satellite-terrestrial networks is presented, focusing on architecture design, key technologies, and modeling frameworks, while also addressing issues related to routing and resource management. In response to constraints such as long round-trip delays, severe Doppler effects, and limited onboard computing capabilities in satellite-ground links, a task-driven semantic transmission mechanism and a robust joint source-channel coding strategy are proposed. Key challenges including multimodal semantic processing and real-time knowledge base updates are also examined. By establishing a cross-layer coordination mechanism centered on semantic intent and importance awareness, a unified communication architecture and an evolvable technical pathway tailored for satellite-ground scenarios are developed. This work offers theoretical foundations and systematic guidance for future advancements in the field.

Keywords: satellite-terrestrial integrated network; semantic communication; intelligent network; joint source-channel coding; large model