Method for determining rank indication ri bit number, base station, and terminal

A method for determining a rank indication (RI) bit number, the method comprising:

• receiving, by a terminal, indication information sent by a base station, wherein the indication information is used for determining a bit number occupied for sending a RI;
• and
• determining, by the terminal, the bit number based on the indication information and a multi-input multi-output (MIMO) capability indicated by a terminal category or indicated by a band combination.

A base station, comprising:

• a processor configured to determine an indication information, based on a multi-input multi-output (MIMO) capability indicated by a terminal category of a terminal or indicated by a band combination of a terminal;
• and
• a transmitter configured to send the indication information to the terminal for acquire the bit number occupied for sending a rank indication RI.

A terminal, comprising:

• a receiver configured to receive indication information sent by a base station, wherein the indication information is used for determining a bit number occupied for sending a rank indication (RI);
• and
• a processor configured to determine the bit number based on the indication information and a multi-input multi-output (MIMO) capability indicated by a terminal category or indicated by a band combination.