Channel measurement method and apparatus

A channel measurement method, comprising:

• for a to-be-measured frequency band that comprises reporting subbands and at least one non-reporting subband, obtaining channel state information of each reporting subband, wherein the channel state information of each reporting subband is obtained based on channel estimation, and the reporting subbands are contiguous in frequency domain, or the reporting subbands are not contiguous in frequency domain;
• sending a measurement report of the to-be-measured frequency band to a transmit end device, wherein the measurement report comprises the channel state information of one or more of the reporting subbands;
• receiving dynamic signaling, wherein the dynamic signaling comprises a third information bitmap, and the third information bitmap is used to indicate an index of a first information bitmap or an index of a second information bitmap, wherein the information bit map is used to indicate the reporting subband and a non-reporting subband in the reporting band, wherein the second information bit map is used to a reporting subband group and non-reporting subband group;
• and
• selecting, based on an index indicator of the third information bitmap, the reporting subband and the non-reporting subband that are indicated by the first information bitmap or the reporting subband group and non-reporting subband group indicated by the second information bitmap;
• wherein the channel state information of the at least one non-reporting subband is based on the channel state information of the reporting subbands, and the channel state information of the at least one non-reporting subband is transmitted to the transmit end device.