面向智能任务的语义通信:理论、技术和挑战  

Intelligent task-oriented semantic communications:theory,technology and challenges

作　　者：刘传宏 郭彩丽[1,2] 杨洋[2] 陈九九 朱美逸 孙鲁楠 LIU Chuanhong;GUO Caili;YANG Yang;CHEN Jiujiu;ZHU Meiyi;SUN Lu’nan(Beijing Laboratory of Advanced Information Networks,Beijing University of Posts and Telecommunications,Beijing 100876,China;Beijing Key Laboratory of Network System Construction and Integration,Beijing University of Posts and Telecommunications,Beijing 100876,China)

机构地区：[1]北京邮电大学先进信息网络北京实验室,北京100876 [2]北京邮电大学网络体系构建与融合北京市重点实验室,北京100876

出　　处：《通信学报》2022年第6期41-57,共17页Journal on Communications

基　　金：中央高校基本科研业务费专项资金资助项目(No.2021XD-A01-1);北京市自然科学基金资助项目(No.4202049);北京邮电大学博士生创新基金资助项目(No.CX2022101)。

摘　　要：未来机-机、人-机万物智能互联对传统通信方式提出了挑战,提取信源语义信息进行传输的语义通信方法为6G提供了新的解决方法。首先,综述了语义通信的发展历程和研究现状,分析了语义通信目前面临的两大瓶颈问题,提出了面向智能任务的语义通信架构,给出了面向智能任务的语义信息熵和语义信道容量的度量方法;其次,针对不同的智能任务,分别提出了语义编码和语义联合信源信道编码方案;再次,搭建了语义通信平台,对所提方法进行实验验证;最后,对语义通信未来的挑战和开放性问题进行了总结。语义通信方法相较于传统通信方法可以大大降低传输数据量和传输时延,将在未来万物智联的通信中发挥重要作用。In the future,intelligent interconnection of all things,such as machine-to-machine and human-to-machine,poses challenges to traditional communication methods.The semantic communication method that extracts semantic information from source information and transmits them provides a novel solution for the 6G communication system.First,the development process and research status of semantic communications were reviewed,the two bottleneck problems faced by semantic communications were analyzed,and an intelligent task-oriented semantic communication architecture was proposed.The measurement methods of task-oriented semantic entropy and semantic channel capacity were given.For different intelligent tasks,semantic coding and semantic source-channel joint coding schemes were proposed respectively.Besides,a semantic communication platform was built to verify the proposed method.Finally,the future challenges and open issues of semantic communications were summarized.Compared with traditional communication methods,semantic communication can significantly reduce the amount of transmitted data and the transmission delay,and it will play an important role in the future communication of the Internet of everything.

关 键 词：6G 语义熵 语义通信 语义编码 智能任务 

分 类 号：TN929.5[电子电信—通信与信息系统]