A Cooperative Relay Network for Semantic Communication with Network Coding
Qikun Yin, Haotai Liang, Zhicheng Bao, Wannian An · 2023
Semantic communication can improve communication efficiency and quality. However, when the communication distance is long, it will cause severe signal attenuation. This paper discusses a cooperative relay network based on semantic network coding (CR-SNC) to improve the reliability problem in long-distance semantic communication image transmission. By introducing a relay node, we cooperatively encode the semantic information of multiple users at the relay. Without reducing the transmission efficiency, the reliability of image transmission in semantic communication is improved. The solution efficiently utilizes the characteristic of semantic information by using network coding techniques to jointly encode the semantic features of multiple users, thereby improving the reliability of transmission. Through experiments, compared with the traditional communication model, the cooperative relay network model proposed in this paper can achieve a better image restoration effect in the environment of low signal-to-noise ratio (SNR).