Communication method and apparatus

A method, applied to a terminal device side, the method comprising:

• receiving first information from an access network device, wherein the first information is used for determining a first performance difference between performance of a first decoder in the access network device and performance of a second decoder in a terminal device;
• decoding, via the second decoder, an encoded bit stream corresponding to channel data, to obtain channel information;
• determining a first value of a rank based on the first performance difference and the channel information;
• and
• sending, to the access network device, a rank indicator and a channel quality indicator corresponding to the first value, wherein the rank indicator indicates the first value.

A method, applied to an access network device side, the method comprising:

• determining a first performance difference between performance of a first decoder in an access network device and performance of a second decoder in a terminal device;
• sending first information to the terminal device, wherein the first information is related to the first performance difference;
• and
• receiving, from the terminal device, a rank indicator and a channel quality indicator corresponding to a first value of a rank, wherein the rank indicator indicates the first value of the rank, the first value is determined based on the first performance difference and channel information, and the channel information is obtained by decoding, via the second decoder, an encoded bit stream corresponding to channel data.

An apparatus, comprising at least one processor and a communication circuit, wherein the at least one processor is configured to perform:

• receiving first information from an access network device, wherein the first information is used for determining a first performance difference between performance of a first decoder in the access network device and performance of a second decoder in a terminal device;
• decoding, via the second decoder, an encoded bit stream corresponding to channel data, to obtain channel information;
• determining a first value of a rank based on the first performance difference and the channel information;
• and
• sending, to the access network device, a rank indicator and a channel quality indicator corresponding to the first value, wherein the rank indicator indicates the first value.