Data transmission method, device, network device and user equipment

1. A data transmission method, applied to a first device, comprising:

transmitting Uplink (UL) Sounding Reference Signal (SRS) resource configuration information to a second device; wherein the SRS resource configuration information indicates K SRS resources;

receiving an SRS signal transmitted from the second device according to the SRS resource configuration information;

determining an SRS Resource Indicator (SRI); wherein the SRI indicates L SRS resources in the K SRS resources, L is an integer that is larger than or equals 1 and L is less than or equals K; and

transmitting the SRI to the second device;

wherein each layer of the UL data transmission has a corresponding relationship with at least one SRS resource indicated by the SRI;

wherein a UL beam forming matrix adopted by each layer of the UL data transmission is consistent with a UL beam forming matrix of SRS resources corresponding to the layer of the UL data transmission.

2. The data transmission method according to claim 1 , further comprising:

determining a Transmission Rank Indicator (TRI) corresponding to UL data transmission of the second device; wherein the TRI denotes layer number of the UL data transmission; and

transmitting the TRI to the second device.

3. The data transmission method according to claim 1 , wherein the corresponding relationship between the each layer of the UL data transmission and the at least one SRS resource in the L SRS resources is indicated by a Layer-to-SRI mapping Indicator (LSI); and the method further comprises:

transmitting the LSI to the second device.

4. The data transmission method according to claim 1 , wherein the corresponding relationship between the each layer of the UL data transmission and the at least one SRS resource in the L SRS resources is indicated by the SRI.

5. The data transmission method according to claim 4 , wherein the number L of SRS resources indicated by the SRI is consistent with the layer number of the UL data transmission or codeword number.

6. The data transmission method according to claim 4 , wherein a k-th SRS resource indicated by the SRI has a corresponding relationship with a k-th layer of the UL data transmission or k-th codeword, 1≤k≤L, k is an integer.

7. A data transmission method, applied to a second device, comprising:

receiving Uplink (UL) Sounding Reference Signal (SRS) resource configuration information transmitted from a first device; wherein the SRS resource configuration information indicates K SRS resources;

transmitting an SRS signal to the first device according to the SRS resource configuration information;

receiving an SRS Resource Indicator (SRI) transmitted from the first device; wherein the SRI indicates L SRS resources in the K SRS resources, L is an integer that is larger than or equals 1 and L is less than or equals K; and

performing UL data transmission according to the SRI;

wherein each layer of the UL data transmission has a corresponding relationship with at least one SRS resource indicated by the SRI;

wherein a UL beam forming matrix adopted by each layer of the UL data transmission is consistent with a UL beam forming matrix of SRS resources corresponding to the layer of the UL data transmission.

8. The data transmission method according to claim 7 , further comprising:

receiving a Transmission Rank Indicator (TRI) corresponding to the UL data transmission transmitted from the first device; wherein the TRI denotes a layer number of the UL data transmission; and

parsing the TRI to obtain the layer number of the UL data transmission determined by the first device for the second device.

9. The data transmission method according to claim 7 , wherein the corresponding relationship between the each layer of the UL data transmission and the at least one SRS resource in the L SRS resources is indicated by a Layer-to-SRI mapping Indicator (LSI); and the method further comprises:

receiving the LSI transmitted from the first device;

parsing the LSI to obtain the corresponding relationship between the each layer of the UL data transmission and the at least one SRS resource in the L SRS resources.

10. The data transmission method according to claim 7 , wherein the corresponding relationship between the each layer of the UL data transmission and the at least one SRS resource in the L SRS resources is indicated by the SRI,

performing the UL data transmission according to the SRI comprises:

parsing the SRI to obtain the corresponding relationship between the each layer of the UL data transmission and the at least one SRS resource in the L SRS resources; and

respectively transmitting corresponding layers of UL data transmission using the L SRS resources.

11. The data transmission method according to claim 10 , wherein the number L of SRS resources indicated by the SRI is consistent with the layer number of the UL data transmission or codeword number.

12. The data transmission method according to claim 10 , wherein a k-th SRS resource indicated by the SRI has a corresponding relationship with a k-th layer of the UL data transmission or k-th codeword, 1≤k≤L, k is an integer.

13. A network side device, comprising: a storage, a transceiver, a processor and computer programs, which are stored in the storage and run on the processor; wherein when the processor executes the computer programs, following steps are implemented: transmitting Uplink (UL) Sounding Reference Signal (SRS) resource configuration information to a second device via the transceiver, wherein the SRS resource configuration information indicates K SRS resources; receiving an SRS signal transmitted from the second device according to the SRS resource configuration information; determining an SRS Resource Indicator (SRI), wherein the SRI indicates L SRS resources in the K SRS resources, L is an integer that is larger than or equals 1 and L is less than or equals K; and transmitting the SRI to the second device;

wherein each layer of the UL data transmission has a corresponding relationship with at least one SRS resource indicated by the SRI;

wherein a UL beam forming matrix adopted by each layer of the UL data transmission is consistent with a UL beam forming matrix of SRS resources corresponding to the layer of the UL data transmission.

14. A user device, comprising: a storage, a transceiver, a processor and computer programs, which are stored in the storage and run on the processor; wherein when the processor executes the computer programs, following steps of claim 7 are implemented: receiving Uplink (UL) Sounding Reference Signal (SRS) resource configuration information transmitted from a first device via the transceiver, wherein the SRS resource configuration information indicates K SRS resources; transmitting an SRS signal to the first device according to the SRS resource configuration information; receiving an SRS Resource Indicator (SRI) transmitted from the first device, wherein the SRI indicates L SRS resources in the K SRS resources, L is an integer that is larger than or equals 1 and L is less than or equals K; and performing UL data transmission according to the SRI;

wherein each layer of the UL data transmission has a corresponding relationship with at least one SRS resource indicated by the SRI;

wherein a UL beam forming matrix adopted by each layer of the UL data transmission is consistent with a UL beam forming matrix of SRS resources corresponding to the layer of the UL data transmission.

15. The network side device according to claim 13 , wherein the processor is configured to,

determine a Transmission Rank Indicator (TRI) corresponding to UL data transmission of the second device; wherein the TRI denotes layer number of the UL data transmission; and

transmit the TRI to the second device.

16. The user device according to claim 14 , wherein the processor is configured to,

receive a Transmission Rank Indicator (TRI) corresponding to the UL data transmission transmitted from the first device; wherein the TRI denotes a layer number of the UL data transmission; and

parse the TRI to obtain the layer number of the UL data transmission determined by the first device for the second device.