This letter proposes a novel relaying framework, semantic-forward (SF), for
cooperative communications towards the sixth-generation (6G) wireless networks.
The SF relay extracts and transmits the semantic features, which reduces
forwarding payload, and also improves the network robustness against intra-link
errors. Based on the theoretical basis for cooperative communications with side
information and the turbo principle, we design a joint source-channel coding
algorithm to iteratively exchange the extrinsic information for enhancing the
decoding gains at the destination. Surprisingly, simulation results indicate
that even in bad channel conditions, SF relaying can still effectively improve
the recovered information quality.

该论文提出了一种新的转发框架，语义向前（SF），用于面向第六代（6G）无线网络的合作通信。SF 中继提取并传输语义特征，减少转发负载，并提高网络对内部链路错误的鲁棒性。基于具有额外信息的合作通信的理论基础和 Turbo 原则，我们设计了一种联合源 - 信道编码算法，以迭代地交换外部信息，提高目的地的解码增益。令人惊讶的是，模拟结果表明，即使在恶劣的信道条件下，SF 中继仍可以有效地提高恢复的信息质量。