Channel information sending method and apparatus and channel information receiving method and apparatus

An apparatus, comprising:

• at least one processor;
• and
• one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to cause the apparatus to:
• receive configuration information from a network device, wherein the configuration information identifies Q demodulation reference signal (DMRS) ports used for measurement, and Q is a positive integer;
• receive indication information from the network device, wherein the indication information indicates M DMRS ports, in the Q DMRS ports used for measurement, that carry downlink data, M is a positive integer, and Q is greater than M;
• and
• send channel information of P DMRS ports to the network device, wherein the P DMRS ports belong to the Q DMRS ports used for measurement, and P is a positive integer.

An apparatus, comprising:

• at least one processor;
• and
• one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to cause the apparatus to:
• send configuration information to a terminal device, wherein the configuration information identifies Q demodulation reference signal (DMRS) ports used for measurement, and Q is a positive integer;
• and send indication information to the terminal device, wherein the indication information indicates M DMRS ports, in the Q DMRS ports used for measurement, that carry downlink data, M is a positive integer, and Q is greater than M;
• and
• receive channel information of P DMRS ports from the terminal device, wherein the P DMRS ports belong to the Q DMRS ports used for measurement, and P is a positive integer.