基于统一语义表征的多用户异构语义网络

Multi-user Heterogeneous Semantic Network Based on Unified Semantic Representation

多用户语义通信,特别是异构语义网络是目前研究较少的课题。提出一种基于统一语义表征的单编码器-单解码器框架,其中异构的语义知识作为引导语义提取和表达的秘钥——符号消息被映射到统一的本原语义空间,并根据接收端用户各自的语义知识特异化解码。所提掩膜推理和异构语义转述约束,相较常用的点对点自编码方案,给语义可解释性及拓展性带来显著增强。针对多用户语义安全性,还提出一种利用语义知识流形空间进行语义加密的方法。

Multi-user semantic communication,typically heterogeneous semantic network,is a less-investigated topic.A singleencoder-single-decoder architecture based on unified semantic representation is proposed,under which heterogeneous semantic knowledge is utilized as the secret key that guides both semantic extraction and expression process-symbolic messages are first mapped into a unified primitive semantic space,and then decoded contingent on the receivers’own semantic knowledge.Compared with the commonly adopted point-to-point auto-encoding scheme,the proposed mask reasoning and heterogeneous semantic translation constraints significantly benefit the semantic interpretability and scalability.Targeted on multi-user semantic security,a semantic-level encryption method that manipulates the semantic knowledge manifold is further introduced.