Method, apparatus and system for acquiring codebook by channel state information report type

An apparatus for acquiring a codebook, comprising:

• a processor;
• and
• a memory for storing instructions executable by the processor;
• wherein the processor is configured to:
• generate a main codebook corresponding to Nt ports and r layers transmission according to a first preset condition;
• wherein Nt is a number of ports and r is a number of transmission layers, and the first preset condition is a common set condition between a base station and a terminal and at least comprises the terminal saving the same main codebook;
• generate one or more codeword sets corresponding to the main codebook according to a sixth preset condition and the main codebook;
• and
• configure the codebook according to a notification;
• wherein the terminal is configured to select a precoding matrix from the codebook and feedback precoding matrix indicators corresponding to the precoding matrix, and the notification comprises at least one of:
• information of selecting a codeword set from the one or more codeword sets, or information of selecting a codeword from one of the one or more codeword sets.

A system for acquiring a codebook, comprising a base station and a terminal, wherein the base station and the terminal is communicatively connected;

• wherein
• the base station is configured to:
• generate a main codebook corresponding to Nt ports and r layers transmission according to a first preset condition;
• wherein Nt is a number of ports, and r is a number of transmission layers, and the first preset condition is a common set condition between the base station and the terminal and at least comprises the terminal saving the same main codebook;
• generate one or more codeword sets corresponding to the main codebook according to a sixth preset condition and the main codebook;
• configure the codebook according to a notification;
• wherein the terminal is configured to select a precoding matrix from the codebook and feedback precoding matrix indicators corresponding to the precoding matrix, and the notification comprises at least one of:
• information of selecting a codeword set from the one or more codeword sets, or information of selecting a codeword from one of the one or more codeword sets;
• and notify the configured codebook to the terminal through CSS signaling;
• and
• the terminal is configured to:
• obtain the main codebook corresponding to the Nt ports and the r layers transmission according to the first preset condition;
• receive the CSS signaling transmitted from the base station;
• and determine the codebook from the main codebook according to the CSS signaling.