Abstract: A first node obtains first power control information (PCI) based on an information security protection requirement, a maximum transmit power of a second node, and channel information between the first and second nodes. The first PCI is a piece of PCI that is obtained through prediction and that maximizes a signal-to-noise ratio of a received signal of the first node when the information security protection requirement is met. The received signal includes a signal from the second node. In addition, the first node sends the first PCI to the second node, where the first PCI is used by the second node to generate a first signal. The first node then receives the first signal from the second node, where the first signal includes data information and security protection information, and the security protection information is used to protect information security of the data information.

Abstract: A GAN training method, a machine learning system, and a communication apparatus are provided, which relate to the field of communication technologies and AI. The machine learning system includes a first device and a second device, where a first GAN runs on the first device, a second GAN runs on the second device, the first GAN includes a first generator and a first discriminator, and the second GAN includes a second generator and a second discriminator.

Abstract: A communication method and apparatus are provided. A modulation and coding scheme is determined based on a first norm of a first communication apparatus, and the first communication apparatus uploads information about a first learning model based on the modulation and coding scheme. The first norm of the first communication apparatus represents an importance degree of a local dataset of the first communication apparatus. The modulation and coding scheme used in a process in which a local training result is uploaded is determined based on the first norm, so that efficiency of federated learning can be improved.

Abstract: A data retransmission method, a relay station, a base station, and a communication system are provided. The data retransmission method includes: receiving a reception report sent by a base station and source data frames of a current transmission period that are sent by a user equipment through a subchannel, where the reception report carries sequence numbers of source data frames of a previous transmission period and the source data frames are not correctly received by the base station; obtaining according to the reception report and pre-stored source data frames of the previous transmission period, a set C1 of source data frames of the previous transmission period that need to be retransmitted; performing joint encoding for the source data frames in the set C1 and the source data frames of the current transmission period; and sending forwarded data frames generated by joint encoding to the base station through the subchannel.