Phase tracking reference signal association indication and transmission method, network device and terminal

1. A Phase Tracking Reference Signal (PTRS) association indication method for a network device, comprising:

transmitting indication information to a terminal, the indication information being used to indicate information of a DeModulation Reference Signal (DMRS) port to the terminal, the DMRS port being associated with a PTRS port in uplink transmission using a Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) waveform,

wherein when the uplink transmission is non-codebook-based transmission, the transmitting the indication information to the terminal comprises:

transmitting the indication information to the terminal when PTRS ports corresponding to at least two Sounding Reference Signal (SRS) resources are a same one PTRS port.

2. The PTRS association indication method according to claim 1 , wherein the transmitting the indication information to the terminal when the PTRS ports corresponding to the at least two SRS resources are same comprises one of:

when the quantity of the PTRS ports is 1 and the quantity of the DMRS ports is 2, transmitting the indication information to the terminal through one bit;

when the quantity of the PTRS ports is 2 and the quantity of the DMRS ports is 2, not transmitting the indication information to the terminal;

when the quantity of the PTRS ports is 1 or 2 and the quantity of the DMRS ports is 4, transmitting the indication information to the terminal through two bits.

3. The PTRS association indication method according to claim 1 , wherein when the uplink transmission is codebook-based transmission, the transmitting the indication information to the terminal comprises:

transmitting a correspondence between the PTRS ports and the DMRS ports to the terminal through a Transmit Precoding Matrix Indicator (TPMI) and a Transmit Rank Indicator (TRI);

transmitting the indication information to the terminal in accordance with the TPMI and the TRI.

4. The PTRS association indication method according to claim 3 , wherein the transmitting the indication information to the terminal in accordance with the TPMI and the TRI comprises:

when the TRI is 1, not transmitting the indication information to the terminal.

5. The PTRS association indication method according to claim 3 , wherein with respect to the terminal that supports full-coherent transmission, the transmitting the indication information to the terminal in accordance with the TPMI and the TRI comprises at least one of:

when the TRI is 2, transmitting the indication information to the terminal through one bit;

when the TRI is 3 or 4, transmitting the indication information to the terminal through two bits.

6. The PTRS association indication method according to claim 3 , wherein with respect to the terminal supports non-coherent transmission or semi-coherent transmission, the transmitting the indication information to the terminal in accordance with the TPMI and the TRI comprises one of:

when the quantity Tx of transmission antennae is 2, the TRI is 2, the TPMI is 0, and the quantity of the PTRS ports is 2, not transmitting the indication information to the terminal;

when the quantity Tx of the transmission antennae is 4, the TRI is 2, the TPMI is 0, 2, 3, 5, 6, 7, 8, 9, 10, 11, 12 or 13, and the quantity of the PTRS ports is 2, not transmitting the indication information to the terminal;

when the quantity Tx of the transmission antennae is 4, the TRI is 2, the TPMI is 1 or 4, and the quantity of the PTRS ports is 1, transmitting the indication information to the terminal through one bit;

when the quantity Tx of the transmission antennae is 4, the TRI is 3, the TPMI is 0, 1 or 2, and the quantity of the PTRS ports is 2, transmitting the indication information to the terminal through one bit;

when the quantity Tx of the transmission antennae is 4, the TRI is 4, the TPMI is 0, 1 or 2, and the quantity of the PTRS ports is 2, transmitting the indication information to the terminal through two bits.

7. The PTRS association indication method according to claim 1 , wherein when the uplink transmission is codebook-based transmission, the transmitting the indication information to the terminal comprises:

transmitting the correspondence between the PTRS ports and the DMRS ports to the terminal in accordance with the quantity of SRS ports, the quantity of the PTRS ports, and the quantity of supported maximum transmission layers.

8. The PTRS association indication method according to claim 7 , wherein when the quantity of the supported maximum transmission layers is 1, mapping of the PTRS ports is not indicated through an additional bit.

9. The PTRS association indication method according to claim 7 , wherein with respect to the terminal that supports full-coherent transmission, the transmitting the correspondence between the PTRS ports and the DMRS ports to the terminal in accordance with the quantity of the SRS ports and the quantity of the supported maximum transmission layers, the transmitting the indication information to the terminal comprises at least one of:

when the quantity of the PTRS ports is 1 and the quantity of the supported maximum transmission layers is 2, transmitting the indication information to the terminal through one bit;

when the quantity of the PTRS ports is 1 and the quantity of the supported maximum transmission layers is 3 or 4, transmitting the indication information to the terminal through two bits.

10. The PTRS association indication method according to claim 7 , wherein with respect to the terminal that supports semi-coherent transmission or non-coherent transmission, the transmitting the correspondence between the PTRS ports and the DMRS ports to the terminal in accordance with the quantity of the SRS ports, the quantity of the PTRS ports and the quantity of the supported maximum transmission layers, the transmitting the indication information to the terminal comprises at least one of:

when the quantity of the PTRS ports is 2, the quantity of the SRS ports is 2, and the quantity of the supported maximum transmission layers is 2, not indicating the mapping of the PTRS ports through an additional bit;

when the quantity of the PTRS ports is 2, the quantity of the SRS ports is 4, and the quantity of the supported maximum transmission layers is 2, not indicating the mapping of the PTRS ports through an additional bit;

when the quantity of the PTRS ports is 1, the quantity of the SRS ports is 4, and the quantity of the supported maximum transmission layers is 2, transmitting the indication information to the terminal through one bit;

when the quantity of the PTRS ports is 2, the quantity of the SRS ports is 4, and the quantity of the supported maximum transmission layers is 3, transmitting the indication information to the terminal through one bit;

when the quantity of the PTRS ports is 2, the quantity of the SRS ports is 4, and the quantity of the supported maximum transmission layers is 4, transmitting the indication information to the terminal through two bits.

11. The PTRS association indication method according to claim 1 , wherein the transmitting the indication information to the terminal comprises:

transmitting the indication information to the terminal through Downlink Control Information (DCI).

12. A Phase Tracking Reference Signal (PTRS) transmission method for a terminal, comprising:

acquiring information of a DeModulation Reference Signal (DMRS) port associated with a PTRS port in uplink transmission using a Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) waveform; and

transmitting data for the PTRS port on the DMRS port associated with the PTRS port,

wherein the acquiring the information of the DMRS port associated with the PTRS port in the uplink transmission using the CP-OFDM waveform comprises:

receiving indication information transmitted by a network device, the indication information being used to indicate to the terminal the information of the DMRS port associated with the PTRS port in the uplink transmission using the CP-OFDM waveform; or

acquiring the information of the DMRS port associated with the PTRS port in the uplink transmission using the CP-OFDM waveform, wherein the information of the DMRS port associated with the PTRS port in the uplink transmission using the CP-OFDM waveform is predefined in a protocol,

wherein when the uplink transmission is non-codebook-based transmission, the information of the DMRS port associated with the PTRS port in the uplink transmission using the CP-OFDM waveform predefined in the protocol comprises: a DMRS port with a minimum or maximum serial number in all the DMRS ports corresponding to the PTRS port.

13. The PTRS transmission method according to claim 12 , wherein when the uplink transmission is non-codebook-based transmission, the receiving the indication information transmitted by the network device comprises:

receiving the indication information transmitted by the network device when PTRS ports corresponding to at least two Sounding Reference Signal (SRS) resources are a same one PTRS port.

14. The PTRS transmission method according to claim 13 , wherein the receiving the indication information transmitted by the network device when the PTRS ports corresponding to at least two SRS resources are same comprises one of:

when the quantity of the PTRS ports is 1 and the quantity of the DMRS ports is 2, receiving the indication information transmitted by the network device through one bit;

when the quantity of the PTRS ports is 1 or 2 and the quantity of the DMRS ports is 4, receiving the indication information transmitted by the network device through two bits.

15. The PTRS transmission method according to claim 12 , wherein when the uplink transmission is codebook-based transmission, the receiving the indication information transmitted by the network device comprises:

receiving a correspondence between the DMRS ports and the PTRS ports transmitted by the network device through a Transmit Precoding Matrix Indicator (TPMI) and a Transmit Rank Indicator (TRI); and

receiving the indication information transmitted by the network device in accordance with the TPMI and the TRI.

16. A terminal, comprising a processor, a memory, and a computer program stored in the memory and capable of being executed by the processor, wherein the processor is used to execute the computer program, to implement the PTRS transmission method according to claim 12 .

17. A network device, comprising a processor, a memory, and a computer program stored in the memory and capable of being executed by the processor, wherein the processor used to execute the computer program to:

transmit indication information to a terminal, wherein the indication information is used to indicate information of a DeModulation Reference Signal (DMRS) port to the terminal, the DMRS port is associated with a PTRS port in uplink transmission using a Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) waveform,

wherein when the uplink transmission is non-codebook-based transmission, the transmitting the indication information to the terminal comprises:

transmitting the indication information to the terminal when PTRS ports corresponding to at least two Sounding Reference Signal (SRS) resources are a same one PTRS port.