COMMUNICATION METHOD AND COMMUNICATION DEVICE

This application provides a communication method and a communication apparatus. The communication method includes: receiving first information, where the first information indicates first group configuration information and/or second group configuration information, the first group configuration information indicates a correspondence between P reference signal ports and Z layers, and the second group configuration information indicates a correspondence between N frequency domain base vectors and the Z layers; and sending a precoding matrix indicator PMI corresponding to the Z layers, where the PMI is determined based on the first information. According to the communication method, a group configuration relationship between ports and/or frequency domain base vectors and a plurality of layers can be indicated based on partial reciprocity, to obtain accurate downlink channel state information. This implements multi-layer transmission, and improves system spectral efficiency and system transmission performance.