论文标题
多用户无线网络中的语义通信
Semantic Communications in Multi-user Wireless Networks
论文作者
论文摘要
本文调查了多用户网络中语义通信的开发。我们提出了一个新颖的异构语义和多用户框架，以提供完美，自定义和智能信息传输。我们讨论了拟议的异质框架的正交多访问（OMA）和非正交多访问（NOMA），重点是研究语义通信与NOMA之间的有吸引力的相互作用，即NOMA启用了语义通信和语义通信，并增强了语义通信。 1）对于启用NOMA的语义通信，我们提出了一种半肿瘤方案，用于有效促进异质语义和位多用户通信，该方案统一了常规的Noma和OMA方案。表征了基本的性能极限，即语义对与位速率区域，这表明了所提出的半肿瘤的优越性。 2）对于语义通信增强了NOMA，我们提出了一种机会性语义和位沟通方法，以减轻Noma的早期率率差异问题。数值案例研究表明，通过采用语义通信而不是位通信，可以通过使用语义通信来实现NOMA的显着绩效增长。最后，强调了几个开放研究方向。
This article investigates the exploitation of semantic communications in multi-user networks. We propose a novel heterogeneous semantic and bit multi-user framework for providing flawless, customized, and intelligent information transmission. We discuss both orthogonal multiple access (OMA) and non-orthogonal multiple access (NOMA) for the proposed heterogeneous framework, with an emphasis on investigating the attractive interplay between semantic communications and NOMA, namely NOMA enabled semantic communications and semantic communications enhanced NOMA. 1) For NOMA enabled semantic communications, we propose a semi-NOMA scheme for efficiently facilitating the heterogeneous semantic and bit multi-user communication, which unifies conventional NOMA and OMA schemes. The fundamental performance limit, namely semantic-versus-bit rate region, is characterized, which shows the superiority of the proposed semi-NOMA. 2) For semantic communications enhanced NOMA, we propose an opportunistic semantic and bit communication approach to alleviate the early-late rate disparity issue in NOMA. Numerical case studies demonstrate that significant performance gain can be achieved for NOMA by employing semantic communications than bit communications. Finally, several open research directions are highlighted.
