Channel state information transmission method and device, communication node, and storage medium

A channel state information transmission method, applied to a second communication node, the method comprises:

• transmitting configuration information to a first communication node;
• transmitting a channel state information reference signal to the first communication node;
• and
• acquiring channel state information sent by the first communication node, wherein the channel state information is reported according to the configuration information, wherein the channel state information comprises a precoding matrix indicator, wherein a precoding matrix indicated by the precoding matrix indicator is determined by a first set of vectors and a second set of vectors;
• the first group of vectors comprises L vectors, and the second group of vectors comprises Mv vectors, wherein the L and the Mv are positive integers;
• wherein one vector in the first set of vectors corresponds to one port of the channel state information reference signal;
• one vector in the second set of vectors is a discrete fourier transform (DFT) vector with an index number of
• n
• 3
• (
• f
• )
• ;
• wherein an element of the DFT vector with the index nuber of
• n
• 3
• (
• f
• )
• is
• e
• j
• ⁢
• 2
• ⁢
• π
• ⁢
• tn
• 3
• (
• f
• )
• N
• 3
• ,
• wherein t={0,1 . . . N3−1}, N3 is a number of the precoding matrix,
• wherein the channel state information comprises a number of coefficients that need to be reported among coefficients of vectors constituting the precoding matrix;
• wherein whether to indicate positions of the coefficients that need to be reported is determined by means of bit mapping according to a number of layers r of precoding, a number of the first set of vectors L and a number of the second set of vectors Mv.

A communication node, comprising:

• one or more processors;
• and
• a storage means, configured to store one or more programs;
• wherein the one or more programs, upon being executed by the one or more processors, cause the one or more processors to implement the following operations of:
• receiving configuration information from a second communication node;
• receiving a channel state information reference signal sent by the second communication node, according to the configuration information;
• and
• determining, channel state information according to the channel state information reference signal, wherein the channel state information comprises a precoding matrix indicator, wherein a precoding matrix indicated by the precoding matrix indicator is determined by a first set of vectors and a second set of vectors;
• the first set of vectors comprises L vectors, and the second set of vectors comprises Mv vectors, wherein the L and the Mv are positive integers;
• wherein one vector in the first set of vectors corresponds to one port of the channel state information reference signal;
• one vector in the second set of vectors is a discrete fourier transform (DFT) vector with an index number of
• n
• 3
• (
• f
• )
• ;
• wherein an element of the DFT vector with the index number of
• n
• 3
• (
• f
• )
• is:
• e
• j
• ⁢
• 2
• ⁢
• π
• ⁢
• tn
• 3
• (
• f
• )
• N
• 3
• ,
• wherein t={0,1 . . . , N3−1}, N3 is a number of the precoding matrix,
• wherein the channel state information comprises a number of coefficients that need to be reported among coefficients of vectors constituting the precoding matrix;
• determining, whether to indicate positions of the coefficients that need to be reported by means of bit mapping according to a number of layers r of precoding, a number of the first set of vectors L and a number of the second set of vectors Mv;
• reporting the channel state information according to the configuration information.

A second communication node, comprising:

• one or more processors;
• and
• a storage means, configured to store the one or more programs;
• wherein the one or more programs, upon being executed by the one or more processors, cause the one or more processors to implement the following operations of:
• transmitting configuration information to a first communication node;
• transmitting a channel state information reference signal to the first communication node;
• and
• acquiring channel state information sent by the first communication node, wherein the channel state information is reported according to the configuration information, wherein the channel state information comprises a precoding matrix indicator, wherein a precoding matrix indicated by the precoding matrix indicator is determined by a first set of vectors and a second set of vectors;
• the first group of vectors comprises L vectors, and the second group of vectors comprises My vectors, wherein the L and the My are positive integers;
• wherein one vector in the first set of vectors corresponds to one port of the channel state information reference signal;
• one vector in the second set of vectors is a discrete fourier transform (DFT) vector with an index number of
• n
• 3
• (
• f
• )
• ;
• wherein an element of the DFT vector with the index number of
• n
• 3
• (
• f
• )
• is
• e
• j
• ⁢
• 2
• ⁢
• π
• ⁢
• tn
• 3
• (
• f
• )
• N
• 3
• ,
• wherein t={0,1 . . . , N3−1}, N3 is a number of the precoding matrix,
• wherein the channel state information comprises a number of coefficients that need to be reported among coefficients of vectors constituting the precoding matrix;
• wherein whether to indicate positions of the coefficients that need to be reported is determined by means of bit mapping according to a number of layers r of precoding, a number of the first set of vectors L and a number of the second set of vectors Mv.