Channel state parameter transmission method and communication apparatus

An apparatus, comprising:

• one or more processors configured to:
• receive first indication information from a communication apparatus, wherein the first indication information indicates a first channel state parameter, the first channel state parameter is a minimum value of a channel state parameter corresponding to a first multicast group, the first multicast group comprises a plurality of terminal apparatuses that receive same multicast information, and the plurality of terminal apparatuses comprise a first terminal apparatus;
• measure a reference signal from the communication apparatus, to obtain a second channel state parameter;
• and
• send second indication information to the communication apparatus when the second channel state parameter is less than the first channel state parameter, wherein the second indication information indicates the second channel state parameter.

An apparatus, comprising:

• one or more processors configured to:
• determine a first channel state parameter, wherein the first channel state parameter is a minimum value of a channel state parameter corresponding to a first multicast group, and the first multicast group comprises a plurality of terminal apparatuses that receive same multicast information;
• send first indication information to the first multicast group, wherein the first indication information indicates the first channel state parameter;
• and
• receive second indication information from a first terminal apparatus, wherein the second indication information indicates a second channel state parameter, wherein the second channel state parameter is less than the first channel state parameter, and the plurality of terminal apparatuses comprise the first terminal apparatus.