Method for determining rank information

A method for determining rank information, comprising:

• receiving, by a second communication node, configuration information transmitted by a first communication node, wherein the configuration information comprises the rank information;
• determining, by the second communication node, channel state information according to the rank information in the configuration information;
• and
• reporting, by the second communication node, the determined channel state information to the first communication node.

A second communication node, comprising:

• a processor;
• and
• a memory for storing instructions executable by the processor,
• wherein the processor is configured to:
• receive configuration information transmitted by a first communication node, wherein the configuration information comprises the rank information;
• determine channel state information according to the rank information in the configuration information;
• and
• report the determined channel state information to the first communication node.