Indication method, information determination method, apparatus, base station, terminal and storage medium

1. An indication method, comprising:

notifying a demodulation reference signal (DMRS) port indicator, at least one sounding reference signal resource indicator (SRI) and a transmission precoding matrix indicator to a terminal to notify basic information, wherein the basic information comprises at least one of:

DMRS port indication information, precoding codebook or precoding matrix information, or a codebook subset restriction (CSR),

wherein the basic information is determined based on a value of the at least one SRI in the following manner: at least one of the precoding codebook or precoding matrix information, or the codebook subset restriction (CSR) is determined based on R corresponding to the at least one SRI, wherein R denotes a number of sounding reference signal (SRS) resources corresponding to the at least one SRI or a number of reference signals (RSs) contained in a spatial information parameter of an SRS resource corresponding to the at least one SRI;

wherein in a case where the basic information comprises the CSR, the basic information is determined based on the value of the at least one SRI in the following manner:

in a case where R>1, a selected CSR is applied to a plurality of indicators about precoding information and a number of layers.

2. The method of claim 1 , wherein in a case where the basic information comprises the precoding matrix information, the basic information is determined based on the value of the at least one SRI in the following manner:

in a case where R>1, a plurality of precoding matrices are notified in downlink control information (DCI), wherein all columns of the plurality of precoding matrices have a same number of non-zero elements.

3. The method of claim 1 , wherein the basic information comprises the precoding codebook or precoding matrix information, and in a case where R>1, the method further comprises:

indicating a codebook corresponding to R; and

indicating at least one precoding matrix based on the transmission precoding matrix indicator and the codebook corresponding to R.

4. The method of claim 3 , wherein

in the case where R>1, a number of rows of each of the at least one precoding matrix in the codebook corresponding to R is P*R,

wherein P*R indicates that the SRS resources corresponding to the at least one SRI have P*R ports, and the P*R ports sequentially correspond to the rows of each of the at least one precoding matrix in the codebook corresponding to R; and P denotes a number of ports configured for each of the SRS resources corresponding to the at least one SRI.

5. The method of claim 4 , wherein

in each column of each of the at least one precoding matrix in the codebook corresponding to R, elements 0 occupy a proportion of at least

(

1

-

1

R

)

;

or

among elements in each column of each of the at least one precoding matrix in the codebook corresponding to R, at least a first half of the elements are 0 or at least a second half of the elements are 0; or

in each of the at least one precoding matrix in the codebook corresponding to R, elements corresponding to ports in at least odd-numbered port groups are all 0 or elements corresponding to ports in at least even-numbered port groups are all 0, wherein the P*R ports are sequentially and equally divided into four groups.

6. The method of claim 4 , wherein

in a case where R=2, spatial-relation information of first P ports corresponding to each of the at least one precoding matrix in the codebook corresponding to R is from a first of the SRS resources indicated by the at least one SRI or from a first of the RSs contained in the spatial information parameter of the SRS resource indicated by the at least one SRI; spatial-relation information of second P ports corresponding to each of the at least one precoding matrix in the codebook corresponding to R is from a second of the SRS resources indicated by the at least one SRI or from a second of the RSs contained in the spatial information parameter of the SRS resource indicated by the at least one SRI; or

in a case where R=2, 2P ports corresponding to each of the at least one precoding matrix in the codebook corresponding to R are sequentially divided into four groups, and spatial-relation information of P ports whose port numbers are in even-numbered groups of the four groups corresponding to each of the at least one precoding matrix in the codebook corresponding to R is from a first of the SRS resources indicated by the at least one SRI or from a first of the RSs contained in the spatial information parameter of the SRS resource indicated by the at least one SRI; spatial-relation information of P ports whose port numbers are in odd-numbered groups of the four groups corresponding to each of the at least one precoding matrix in the codebook corresponding to R is from a second of the SRS resources indicated by the at least one SRI or from a second of the RSs contained in the spatial information parameter of the SRS resource indicated by the at least one SRI.

7. The method of claim 1 , wherein in a case where R>1, a plurality of transmission layers occupy at least two DMRS code-division multiplexing (CDM) groups; or

wherein different values R correspond to different DMRS port mappings.

8. An information determination method, comprising:

receiving a demodulation reference signal (DMRS) port indicator, at least one sounding reference signal resource indicator (SRI) and a transmission precoding matrix indicator notified by a base station to determine basic information, wherein the basic information comprises at least one of:

DMRS port indication information, precoding codebook or precoding matrix information, or a codebook subset restriction (CSR),

wherein the basic information is determined based on a value of the at least one SRI in the following manner: at least one of the precoding codebook or precoding matrix information, or the codebook subset restriction (CSR) is determined based on R corresponding to the at least one SRI, wherein R denotes a number of sounding reference signal (SRS) resources corresponding to the at least one SRI or a number of reference signals (RSs) contained in a spatial information parameter of an SRS resource corresponding to the at least one SRI;

wherein in a case where the basic information comprises the CSR, the basic information is determined based on the value of the at least one SRI in the following manner:

in a case where R>1, a selected CSR is applied to a plurality of indicators about precoding information and a number of layers.

9. The method of claim 8 , wherein in a case where the basic information comprises the precoding matrix information, the basic information is determined based on the value of the at least one SRI in the following manner:

in a case where R>1, a plurality of precoding matrices notified in downlink control information (DCI) are received, wherein a same column of the plurality of precoding matrices has a same number of non-zero elements.

10. The method of claim 8 , wherein the basic information comprises the precoding codebook or precoding matrix information, and in a case where R>1, the method further comprises:

selecting a codebook corresponding to R; and

determining at least one precoding matrix based on the transmission precoding matrix indicator and the codebook corresponding to R.

11. The method of claim 10 , wherein

in the case where R>1, a number of rows of each of the at least one precoding matrix in the codebook corresponding to R is P*R,

wherein P*R indicates that the SRS resources corresponding to the at least one SRI are configured with P*R ports, and the P*R ports sequentially correspond to the rows of each of the at least one precoding matrix in the codebook corresponding to R; and P denotes a number of ports configured for each of the SRS resources corresponding to the at least one SRI.

12. The method of claim 11 , wherein

in each column of each of the at least one precoding matrix in the codebook corresponding to R, elements 0 occupy a proportion of at least

(

1

-

1

R

)

;

or

among elements in each column of each of the at least one precoding matrix in the codebook corresponding to R, at least a first half of the elements are 0 or at least a second half of the elements are 0; or

in each of the at least one precoding matrix in the codebook corresponding to R, elements corresponding to ports in at least odd-numbered port groups are all 0 or elements corresponding to ports in at least even-numbered port groups are all 0, wherein the P*R ports are sequentially and equally divided into four groups.

13. The method of claim 11 , wherein

in a case where R=2, spatial-relation information of first P ports corresponding to each of the at least one precoding matrix in the codebook corresponding to R is from a first of the SRS resources indicated by the at least one SRI or from a first of the RSs contained in the spatial information parameter of the SRS resource indicated by the at least one SRI; spatial-relation information of second P ports corresponding to each of the at least one precoding matrix in the codebook corresponding to R is from a second of the SRS resources indicated by the at least one SRI or from a second of the RSs contained in the spatial information parameter of the SRS resource indicated by the at least one SRI; or

in a case where R=2, 2P ports corresponding to each of the at least one precoding matrix in the codebook corresponding to R are sequentially divided into four groups, and spatial-relation information of P ports whose port numbers are in even-numbered groups of the four groups corresponding to each of the at least one precoding matrix in the codebook corresponding to R is from a first of the SRS resources indicated by the at least one SRI or from a first of the RSs contained in the spatial information parameter of the SRS resource indicated by the at least one SRI; spatial-relation information of P ports whose port numbers are in odd-numbered groups of the four groups corresponding to each of the at least one precoding matrix in the codebook corresponding to R is from a second of the SRS resources indicated by the at least one SRI or from a second of the RSs contained in the spatial information parameter of the SRS resource indicated by the at least one SRI.

14. The method of claim 8 , wherein in a case where R>1, the transmission layers occupy at least two DMRS code-division multiplexing (CDM) groups; or wherein different values R correspond to different DMRS port mappings.

15. A base station, comprising a first processor, a first memory and a first communication bus, wherein

the first communication bus is configured to enable connection and communication between the first processor and the first memory; and

the first processor is configured to execute at least one first program stored in the first memory to perform the indication method of claim 1 .

16. A terminal, comprising a second processor, a second memory and a second communication bus, wherein

the second communication bus is configured to enable connection and communication between the second processor and the second memory; and

the second processor is configured to execute at least one second program stored in the second memory to perform the following steps:

receiving a demodulation reference signal (DMRS) port indicator, at least one sounding reference signal resource indicator (SRI) and a transmission precoding matrix indicator notified by a base station to determine basic information, wherein the basic information comprises at least one of:

DMRS port indication information, precoding codebook or precoding matrix information, or a codebook subset restriction (CSR),

wherein the basic information is determined based on a value of the at least one SRI in the following manner: at least one of the precoding codebook or precoding matrix information, or the codebook subset restriction (CSR) is determined based on R corresponding to the at least one SRI, wherein R denotes a number of sounding reference signal (SRS) resources corresponding to the at least one SRI or a number of reference signals (RSs) contained in a spatial information parameter of an SRS resource corresponding to the at least one SRI;

wherein in a case where the basic information comprises the CSR, the basic information is determined based on the value of the at least one SRI in the following manner:

in a case where R>1, a selected CSR is applied to a plurality of indicators about precoding information and a number of layers.