Communication method and apparatus, and storage medium

Abstract

Disclosed in the present application are a communication method and apparatus, and a storage medium. In the present application, a network device sends downlink control information (DCI), and correspondingly, a terminal device receives the DCI, wherein the DCI comprises first indication information, the first indication information is used for indicating that a first phase tracking reference signal (PTRS) port is associated with at least one first demodulation reference signal (DMRS) port and / or a second PTRS port is associated with at least one second DMRS port. By means of the solution of the present application, the overheads of certain fields in DCI can be reduced.

Description

Communication method, device and storage medium Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a communication method, device, and storage medium. Background Art

[0002] Phase tracking reference signal (PTRS) ports are associated with corresponding candidate demodulation reference signal (DMRS) ports. Currently, there is no solution for specifying the specific association between PTRS and DMRS ports for a single terminal's uplink support of up to eight physical uplink shared channel (PUSCH) ports and sounding reference signal (SRS) ports, and / or supporting up to four uplink streams per terminal.

[0003] Summary of the Invention

[0004] The present application provides a communication method, apparatus, and storage medium to accurately determine the association relationship between a PTRS port and a DMRS port, thereby saving signaling overhead.

[0005] In a first aspect, a communication method is provided, the method comprising: sending downlink control information (DCI), the DCI comprising first indication information, the first indication information being used to indicate that a first phase tracking reference signal (PTRS) port is associated with at least one first demodulation reference signal (DMRS) port and / or that a second PTRS port is associated with at least one second DMRS port;

[0006] When the number of scheduled DMRS ports shared by the first PTRS port is greater than 2, the first indication information is used to indicate that the first PTRS port is associated with the at least one first DMRS port according to the first PTRS-DMRS association relationship; or

[0007] When the number of scheduled DMRS ports shared by the second PTRS port is greater than 2, the first indication information is used to indicate that the second PTRS port is associated with the at least one second DMRS port according to the second PTRS-DMRS association relationship; or

[0008] When the number of scheduled DMRS ports shared by the first PTRS port is less than or equal to 2 and the number of DMRS ports associated with the second PTRS port is less than or equal to 2, according to the third PTRS-DMRS association relationship, the first indication information is used to indicate that the first PTRS port is associated with the at least one first DMRS port and the second PTRS port is associated with the at least one second DMRS port.

[0009] In this aspect, the association relationship between the PTRS port and the DMRS port can be accurately determined while reducing signaling overhead.

[0010] In a possible implementation, the scheduling DMRS port shared by the first PTRS port includes the first DMRS port; and the scheduling DMRS port shared by the second PTRS port includes the second DMRS port.

[0011] In one possible implementation, the first PTRS port is associated with the at least one first DMRS port corresponding to the sounding reference signal SRS resource identifier field and / or precoding information and rank field; or, the second PTRS port is associated with the at least one second DMRS port corresponding to the SRS resource identifier field and / or precoding information and rank field.

[0012] In one possible implementation, the maximum number of configured PTRS ports is 2.

[0013] In a possible implementation, the SRS resource set identifier field does not exist or the SRS resource set field exists and is equal to "00" or "01".

[0014] In a possible implementation, the number of physical uplink shared channel PUSCH antenna ports is 8.

[0015] In one possible implementation, the maximum rank is less than or equal to 4.

[0016] In a possible implementation, the at least one first DMRS port or the at least one second DMRS port is indicated by an antenna port field, and the antenna port field is sent through the DCI.

[0017] In one possible implementation, when the number of scheduling DMRS ports shared by the first PTRS port is greater than 2, if the second PTRS port exists, the second PTRS port is associated with the only scheduling DMRS port shared with the second PTRS port; or, when the number of scheduling DMRS ports shared by the second PTRS port is greater than 2, if the first PTRS port exists, the first PTRS port is associated with the only scheduling DMRS port shared with the first PTRS port.

[0018] In a possible implementation, the number of bits of the first indication information is 2, the first PTRS-DMRS association relationship is used for the first PTRS port, and the first PTRS-DMRS association relationship includes:

[0019] The first value of the first indication information corresponds to the first scheduled DMRS port;

[0020] The second value of the first indication information corresponds to the second scheduled DMRS port;

[0021] The third value of the first indication information corresponds to the third scheduled DMRS port;

[0022] The fourth value of the first indication information corresponds to the fourth scheduled DMRS port.

[0023] In a possible implementation, the number of bits of the first indication information is 2, the second PTRS-DMRS association relationship is used for the second PTRS port, and the second PTRS-DMRS association relationship includes:

[0024] The first value of the first indication information corresponds to the first scheduled DMRS port;

[0025] The second value of the first indication information corresponds to the second scheduled DMRS port;

[0026] The third value of the first indication information corresponds to the third scheduled DMRS port;

[0027] The fourth value of the first indication information corresponds to the fourth scheduled DMRS port.

[0028] In a possible implementation, the number of bits of the first indication information is 2, the third PTRS-DMRS association relationship is used for the first PTRS port and the second PTRS port, and the third PTRS-DMRS association relationship includes:

[0029] A first value of the most significant bit MSB of the first indication information corresponds to the first DMRS port shared by the first PTRS port;

[0030] The second value of the MSB of the first indication information corresponds to the second DMRS port shared by the first PTRS port;

[0031] A first value of the least significant bit LSB of the first indication information corresponds to the first DMRS port shared by the second PTRS port;

[0032] The second value of the LSB of the first indication information corresponds to the second DMRS port shared by the second PTRS port.

[0033] In one possible implementation, the at least one first DMRS port includes at least one of the following:

[0034] The only DMRS port shared with the first PTRS port;

[0035] The first scheduled DMRS port;

[0036] The second scheduled DMRS port;

[0037] The third scheduled DMRS port;

[0038] The fourth scheduled DMRS port;

[0039] The first DMRS port shared with the first PTRS port;

[0040] The second DMRS port is shared with the first PTRS port;

[0041] or,

[0042] The at least one second DMRS port includes at least one of the following:

[0043] The only DMRS port shared with the second PTRS port;

[0044] The first scheduled DMRS port;

[0045] The second scheduled DMRS port;

[0046] The third scheduled DMRS port;

[0047] The fourth scheduled DMRS port;

[0048] A DMRS port shared by the first and second PTRS ports;

[0049] The second DMRS port is shared by the second PTRS port.

[0050] In a possible implementation, when the number of configured PTRS ports is 1, according to the first PTRS-DMRS association relationship, the first indication information is further used to indicate that the first PTRS port is associated with at least one first demodulation reference signal DMRS port.

[0051] In one possible implementation,

[0052] PTRS is received via the first PTRS port and / or the second PTRS port, and the PTRS corresponds to the following mapping relationship:

[0053] Where a is the PTRS reference signal, l is the time domain position corresponding to the PTRS signal; k is the frequency domain position corresponding to the PTRS signal; p is the port number; μ is the subcarrier spacing; β PT-RS is the power coefficient; r is the basis sequence.

[0054] In a second aspect, a communication method is provided, the method comprising: receiving downlink control information (DCI), the DCI comprising first indication information, the first indication information being used to indicate that a first phase tracking reference signal (PTRS) port is associated with at least one first demodulation reference signal (DMRS) port and / or that a second PTRS port is associated with at least one second DMRS port;

[0055] When the number of scheduled DMRS ports shared by the first PTRS port is greater than 2, the first indication information is used to indicate that the first PTRS port is associated with the at least one first DMRS port according to the first PTRS-DMRS association relationship; or

[0056] When the number of scheduled DMRS ports shared by the second PTRS port is greater than 2, the first indication information is used to indicate that the second PTRS port is associated with the at least one second DMRS port according to the second PTRS-DMRS association relationship; or

[0057] When the number of scheduled DMRS ports shared by the first PTRS port is less than or equal to 2 and the number of DMRS ports associated with the second PTRS port is less than or equal to 2, according to the third PTRS-DMRS association relationship, the first indication information is used to indicate that the first PTRS port is associated with the at least one first DMRS port and the second PTRS port is associated with the at least one second DMRS port.

[0058] In this aspect, the association relationship between the PTRS port and the DMRS port can be accurately determined while reducing signaling overhead.

[0059] In a possible implementation, the scheduling DMRS port shared by the first PTRS port includes the first DMRS port; and the scheduling DMRS port shared by the second PTRS port includes the second DMRS port.

[0060] In one possible implementation, the first PTRS port is associated with the at least one first DMRS port corresponding to the sounding reference signal SRS resource identifier field and / or precoding information and rank field; or, the second PTRS port is associated with the at least one second DMRS port corresponding to the SRS resource identifier field and / or precoding information and rank field.

[0061] In one possible implementation, the maximum number of configured PTRS ports is 2.

[0062] In a possible implementation, the SRS resource set identifier field does not exist or the SRS resource set field exists and is equal to "00" or "01".

[0063] In a possible implementation, the number of physical uplink shared channel PUSCH antenna ports is 8.

[0064] In one possible implementation, the maximum rank is less than or equal to 4.

[0065] In a possible implementation, the at least one first DMRS port or the at least one second DMRS port is indicated by an antenna port field, and the antenna port field is sent through the DCI.

[0066] In one possible implementation, when the number of scheduling DMRS ports shared by the first PTRS port is greater than 2, if the second PTRS port exists, the second PTRS port is associated with the only scheduling DMRS port shared with the second PTRS port; or, when the number of scheduling DMRS ports shared by the second PTRS port is greater than 2, if the first PTRS port exists, the first PTRS port is associated with the only scheduling DMRS port shared with the first PTRS port.

[0067] In a possible implementation, the number of bits of the first indication information is 2, the first PTRS-DMRS association relationship is used for the first PTRS port, and the first PTRS-DMRS association relationship includes:

[0068] The first value of the first indication information corresponds to the first scheduled DMRS port;

[0069] The second value of the first indication information corresponds to the second scheduled DMRS port;

[0070] The third value of the first indication information corresponds to the third scheduled DMRS port;

[0071] The fourth value of the first indication information corresponds to the fourth scheduled DMRS port.

[0072] In a possible implementation, the number of bits of the first indication information is 2, the second PTRS-DMRS association relationship is used for the second PTRS port, and the second PTRS-DMRS association relationship includes:

[0073] The first value of the first indication information corresponds to the first scheduled DMRS port;

[0074] The second value of the first indication information corresponds to the second scheduled DMRS port;

[0075] The third value of the first indication information corresponds to the third scheduled DMRS port;

[0076] The fourth value of the first indication information corresponds to the fourth scheduled DMRS port.

[0077] In a possible implementation, the number of bits of the first indication information is 2, the third PTRS-DMRS association relationship is used for the first PTRS port and the second PTRS port, and the third PTRS-DMRS association relationship includes:

[0078] A first value of the most significant bit MSB of the first indication information corresponds to the first DMRS port shared by the first PTRS port;

[0079] The second value of the MSB of the first indication information corresponds to the second DMRS port shared by the first PTRS port;

[0080] A first value of the least significant bit LSB of the first indication information corresponds to the first DMRS port shared by the second PTRS port;

[0081] The second value of the LSB of the first indication information corresponds to the second DMRS port shared by the second PTRS port.

[0082] In one possible implementation, the at least one first DMRS port includes at least one of the following:

[0083] The only DMRS port shared with the first PTRS port;

[0084] The first scheduled DMRS port;

[0085] The second scheduled DMRS port;

[0086] The third scheduled DMRS port;

[0087] The fourth scheduled DMRS port;

[0088] The first DMRS port shared with the first PTRS port;

[0089] The second DMRS port is shared with the first PTRS port;

[0090] or,

[0091] The at least one second DMRS port includes at least one of the following:

[0092] The only DMRS port shared with the second PTRS port;

[0093] The first scheduled DMRS port;

[0094] The second scheduled DMRS port;

[0095] The third scheduled DMRS port;

[0096] The fourth scheduled DMRS port;

[0097] A DMRS port shared by the first and second PTRS ports;

[0098] The second DMRS port is shared by the second PTRS port.

[0099] In a possible implementation, when the number of configured PTRS ports is 1, according to the first PTRS-DMRS association relationship, the first indication information is further used to indicate that the first PTRS port is associated with at least one first demodulation reference signal DMRS port.

[0100] In one possible implementation,

[0101] The PTRS is sent via the first PTRS port and / or the second PTRS port, and the PTRS corresponds to the following mapping relationship:

[0102] Where a is the PTRS reference signal, l is the time domain position corresponding to the PTRS signal; k is the frequency domain position corresponding to the PTRS signal; p is the port number; μ is the subcarrier spacing; β PT-RS is the power coefficient; r is the basis sequence.

[0103] According to a third aspect, a communication method is provided, the method comprising: sending downlink control information DCI, the DCI comprising first indication information, wherein the first indication information is used to indicate that a first PTRS port is associated with at least one first DMRS port and / or a second PTRS port is associated with at least one second DMRS port according to a PTRS-DMRS association relationship; wherein the PTRS-DMRS association relationship is associated with the precoding information and the transmission precoding matrix index TPMI value contained in the rank domain.

[0104] In a possible implementation, the PTRS-DMRS association relationship includes one or more of a first PTRS-DMRS association relationship, a second PTRS-DMRS association relationship, and a third PTRS-DMRS association relationship.

[0105] In one possible implementation, when the codebook type is codebook 2 and rank=4,

[0106] When the TPMI is 0-1, determining that the first PTRS port is associated with the at least one first DMRS port according to the first PTRS-DMRS association relationship; or

[0107] When the TPMI is 2-3, determining that the second PTRS port is associated with the at least one second DMRS port according to the second PTRS-DMRS association relationship; or

[0108] When the TPMI is 4-67, it is determined, according to a third PTRS-DMRS association relationship, that the first PTRS port is associated with the at least one first DMRS port, and the second PTRS port is associated with the at least one second DMRS port.

[0109] In one possible implementation, when the codebook type is codebook 2 and rank=3,

[0110] When the TPMI is 0-3, determining, according to the first PTRS-DMRS association relationship, that the first PTRS port is associated with the at least one first DMRS port; or

[0111] When the TPMI is 4-7, determining, according to the second PTRS-DMRS association relationship, that the second PTRS port is associated with the at least one second DMRS port; or

[0112] When the TPMI is 8-263, it is determined, according to a third PTRS-DMRS association relationship, that the first PTRS port is associated with the at least one first DMRS port, and the second PTRS port is associated with the at least one second DMRS port.

[0113] In one possible implementation, when the codebook type is codebook 2 and rank=1 or rank=2, it is determined that the first PTRS port is associated with the at least one first DMRS port and the second PTRS port is associated with the at least one second DMRS port according to the third PTRS-DMRS association relationship.

[0114] In a fourth aspect, a communication method is provided, the method comprising: receiving downlink control information DCI, the DCI comprising first indication information, and according to a PTRS-DMRS association relationship, the first indication information being used to indicate that a first PTRS port is associated with at least one first DMRS port and / or a second PTRS port is associated with at least one second DMRS port; wherein the PTRS-DMRS association relationship is associated with the precoding information and the transmission precoding matrix index TPMI value contained in the rank domain.

[0115] In a possible implementation, the PTRS-DMRS association relationship includes one or more of a first PTRS-DMRS association relationship, a second PTRS-DMRS association relationship, and a third PTRS-DMRS association relationship.

[0116] In one possible implementation, when the codebook type is codebook 2 and rank=4,

[0117] When the TPMI is 0-1, determining that the first PTRS port is associated with the at least one first DMRS port according to the first PTRS-DMRS association relationship; or

[0118] When the TPMI is 2-3, determining that the second PTRS port is associated with the at least one second DMRS port according to the second PTRS-DMRS association relationship; or

[0119] When the TPMI is 4-67, it is determined, according to a third PTRS-DMRS association relationship, that the first PTRS port is associated with the at least one first DMRS port, and the second PTRS port is associated with the at least one second DMRS port.

[0120] In one possible implementation, when the codebook type is codebook 2 and rank=3,

[0121] When the TPMI is 0-3, determining, according to the first PTRS-DMRS association relationship, that the first PTRS port is associated with the at least one first DMRS port; or

[0122] When the TPMI is 4-7, determining, according to the second PTRS-DMRS association relationship, that the second PTRS port is associated with the at least one second DMRS port; or

[0123] When the TPMI is 8-263, it is determined, according to a third PTRS-DMRS association relationship, that the first PTRS port is associated with the at least one first DMRS port, and the second PTRS port is associated with the at least one second DMRS port.

[0124] In one possible implementation, when the codebook type is codebook 2 and rank=1 or rank=2, it is determined that the first PTRS port is associated with the at least one first DMRS port and the second PTRS port is associated with the at least one second DMRS port according to the third PTRS-DMRS association relationship.

[0125] In a fifth aspect, a communication method is provided, the method comprising: sending downlink control information DCI, the DCI comprising second indication information, wherein, according to a fourth PTRS-DMRS association relationship, the second indication information is used to indicate that a first phase tracking reference signal PTRS port is associated with at least one first demodulation reference signal DMRS port and / or that a second PTRS port is associated with at least one second DMRS port.

[0126] In one possible implementation, the maximum number of configured PTRS ports is 2.

[0127] In a possible implementation, the SRS resource set identifier field does not exist or the SRS resource set field exists and is equal to "00" or "01".

[0128] In a possible implementation, the number of physical uplink shared channel PUSCH antenna ports is 8.

[0129] In one possible implementation, the maximum rank is less than or equal to 4.

[0130] In a possible implementation, the number of bits of the second indication information is 4, the fourth PTRS-DMRS association relationship is used for the first PTRS port and the second PTRS port, and the fourth PTRS-DMRS association relationship includes:

[0131] A first value of the MSB of the second indication information corresponds to a first DMRS port shared by the first PTRS port;

[0132] The second value of the MSB of the second indication information corresponds to the second DMRS port shared by the first PTRS port;

[0133] The third value of the MSB of the second indication information corresponds to the third DMRS port shared by the first PTRS port;

[0134] The fourth value of the MSB of the second indication information corresponds to the fourth DMRS port shared by the first PTRS port;

[0135] The first value of the LSB of the second indication information corresponds to the first DMRS port shared by the second PTRS port;

[0136] The second value of the LSB of the second indication information corresponds to the second DMRS port shared by the second PTRS port;

[0137] The third value of the LSB of the second indication information corresponds to the third DMRS port shared by the second PTRS port;

[0138] The fourth value of the LSB of the second indication information corresponds to the fourth DMRS port shared by the second PTRS port.

[0139] In one possible implementation, the at least one first DMRS port includes at least one of the following:

[0140] The first DMRS port shared with the first PTRS port;

[0141] The second DMRS port is shared with the first PTRS port;

[0142] A third DMRS port shared with the first PTRS port;

[0143] A fourth DMRS port shared with the first PTRS port;

[0144] The at least one second DMRS port includes at least one of the following:

[0145] A DMRS port shared by the first and second PTRS ports;

[0146] The second DMRS port is shared with the second PTRS port;

[0147] The third DMRS port is shared with the second PTRS port;

[0148] The fourth DMRS port is shared with the second PTRS port.

[0149] In the sixth aspect, a communication method is provided, the method comprising: receiving downlink control information DCI, the DCI comprising second indication information, wherein, according to a fourth PTRS-DMRS association relationship, the second indication information is used to indicate that a first phase tracking reference signal PTRS port is associated with at least one first demodulation reference signal DMRS port and / or a second PTRS port is associated with at least one second DMRS port.

[0150] In one possible implementation, the maximum number of configured PTRS ports is 2.

[0151] In a possible implementation, the SRS resource set identifier field does not exist or the SRS resource set field exists and is equal to "00" or "01".

[0152] In a possible implementation, the number of physical uplink shared channel PUSCH antenna ports is 8.

[0153] In one possible implementation, the maximum rank is less than or equal to 4.

[0154] In a possible implementation, the number of bits of the second indication information is 4, the fourth PTRS-DMRS association relationship is used for the first PTRS port and the second PTRS port, and the fourth PTRS-DMRS association relationship includes:

[0155] A first value of the MSB of the second indication information corresponds to a first DMRS port shared by the first PTRS port;

[0156] The second value of the MSB of the second indication information corresponds to the second DMRS port shared by the first PTRS port;

[0157] The third value of the MSB of the second indication information corresponds to the third DMRS port shared by the first PTRS port;

[0158] The fourth value of the MSB of the second indication information corresponds to the fourth DMRS port shared by the first PTRS port;

[0159] The first value of the LSB of the second indication information corresponds to the first DMRS port shared by the second PTRS port;

[0160] The second value of the LSB of the second indication information corresponds to the second DMRS port shared by the second PTRS port;

[0161] The third value of the LSB of the second indication information corresponds to the third DMRS port shared by the second PTRS port;

[0162] The fourth value of the LSB of the second indication information corresponds to the fourth DMRS port shared by the second PTRS port.

[0163] In one possible implementation, the at least one first DMRS port includes at least one of the following:

[0164] The first DMRS port shared with the first PTRS port;

[0165] The second DMRS port is shared with the first PTRS port;

[0166] A third DMRS port shared with the first PTRS port;

[0167] A fourth DMRS port shared with the first PTRS port;

[0168] The at least one second DMRS port includes at least one of the following:

[0169] A DMRS port shared by the first and second PTRS ports;

[0170] The second DMRS port is shared with the second PTRS port;

[0171] The third DMRS port is shared with the second PTRS port;

[0172] The fourth DMRS port is shared with the second PTRS port.

[0173] In a seventh aspect, a communication device is provided, comprising a processor, a memory, and instructions stored in the memory and running on the processor, wherein when the instructions are executed, the communication device executes the methods described in aspects 1 to 6.

[0174] In an eighth aspect, a communication device is provided, comprising a processor for executing a program stored in a memory, wherein when the program is executed, the device executes the method described in the first to sixth aspects.

[0175] In the ninth aspect, a communication method is provided, which includes: a terminal device sends a sounding reference signal SRS on a first resource; the first resource corresponds to 8 SRS ports; the first resource corresponds to at least two consecutive OFDM symbols, and the terminal device sends the sounding reference signal SRS on the at least two consecutive OFDM symbols using the same transmission power.

[0176] In a possible implementation, the first resource is an SRS resource or a part of an SRS resource.

[0177] In one possible implementation, the 8 SRS ports correspond to S port groups, each of the S port groups contains 8 / S SRS ports, and different port groups in the S port groups correspond to different SRS port indexes; the first resource corresponds to S consecutive OFDM symbols, and each port group in the S port groups corresponds to one OFDM symbol in the S consecutive OFDM symbols; different port groups in the S port groups correspond to different OFDM symbols in the S consecutive OFDM symbols, and S is a positive integer greater than 1.

[0178] In one possible implementation, the 8 SRS ports correspond to S port groups, each of the S port groups contains 8 / S ports, and different port groups in the S port groups correspond to different port indexes; the first resource corresponds to M consecutive OFDM symbols, M=R×S, R is the repetition factor; each port group in the S port groups corresponds to R OFDM symbols in the M consecutive OFDM symbols; different port groups in the S port groups correspond to different OFDM symbols in the M consecutive OFDM symbols, M and S are positive integers greater than 1, and R is a positive integer.

[0179] In one possible implementation, when R is greater than 1, on R OFDM symbols in the M consecutive OFDM symbols corresponding to any one of the S port groups, the sequences and / or frequency domain resources corresponding to SRS ports with the same SRS port index are the same.

[0180] In a possible implementation, S=2.

[0181] In a possible implementation, the values ​​of the first powers corresponding to the at least two consecutive OFDM symbols corresponding to the first resource are not completely the same, and the transmission power is the minimum value of the first powers corresponding to the at least two consecutive OFDM symbols.

[0182] In one possible implementation, the first power is determined by the terminal device according to the priority order of PUSCH / PUCCH / PRACH / SRS transmission from high to low and the total transmit power of the terminal device on each OFDM symbol in the at least two consecutive OFDM symbols; the total transmit power is the sum of the power of PUSCH or PUCCH or PRACH or SRS transmitted on each OFDM symbol when the terminal device transmits within the serving cell and within a frequency range; the first power is less than or equal to the total transmit power; the total transmit power is less than or equal to P CMAX , the P CMAX It is the maximum value of the sum of the powers of PUSCH, PUCCH, PRACH or SRS transmitted on each OFDM symbol when the terminal device is transmitting.

[0183] In the tenth aspect, a communication method is provided, which includes: a network device receives a sounding reference signal SRS on a first resource; the first resource corresponds to 8 SRS ports; the first resource corresponds to at least two consecutive OFDM symbols, and the transmission power of the sounding reference signal SRS received by the network device on the at least two consecutive OFDM symbols is the same.

[0184] In a possible implementation, the first resource is an SRS resource or a part of an SRS resource.

[0185] In one possible implementation, the 8 SRS ports correspond to S port groups, each of the S port groups contains 8 / S SRS ports, and different port groups in the S port groups correspond to different SRS port indexes; the first resource corresponds to S consecutive OFDM symbols, and each port group in the S port groups corresponds to one OFDM symbol in the S consecutive OFDM symbols; different port groups in the S port groups correspond to different OFDM symbols in the S consecutive OFDM symbols, and S is a positive integer greater than 1.

[0186] In one possible implementation, the 8 SRS ports correspond to S port groups, each of the S port groups contains 8 / S ports, and different port groups in the S port groups correspond to different port indexes; the first resource corresponds to M consecutive OFDM symbols, M=R×S, R is the repetition factor; each port group in the S port groups corresponds to R OFDM symbols in the M consecutive OFDM symbols; different port groups in the S port groups correspond to different OFDM symbols in the M consecutive OFDM symbols, M and S are positive integers greater than 1, and R is a positive integer.

[0187] In one possible implementation, when R is greater than 1, on R OFDM symbols in the M consecutive OFDM symbols corresponding to any one of the S port groups, the sequences and / or frequency domain resources corresponding to SRS ports with the same SRS port index are the same.

[0188] In a possible implementation, S=2.

[0189] In a possible implementation, the values ​​of the first powers corresponding to the at least two consecutive OFDM symbols corresponding to the first resource are not completely the same, and the transmission power is the minimum value of the first powers corresponding to the at least two consecutive OFDM symbols.

[0190] In one possible implementation, the first power is determined by the terminal device according to the priority order of PUSCH / PUCCH / PRACH / SRS transmission from high to low and the total transmit power of the terminal device on each OFDM symbol in the at least two consecutive OFDM symbols; the total transmit power is the sum of the power of PUSCH or PUCCH or PRACH or SRS transmitted on each OFDM symbol when the terminal device transmits within the serving cell and within a frequency range; the first power is less than or equal to the total transmit power; the total transmit power is less than or equal to P CMAX , the P CMAXIt is the maximum value of the sum of the powers of PUSCH, PUCCH, PRACH or SRS transmitted on each OFDM symbol when the terminal device is transmitting.

[0191] In the eleventh aspect, a communication device is provided, comprising a processor, a memory, and instructions stored in the memory and running on the processor, wherein when the instructions are executed, the communication device executes the method described in the ninth aspect or the tenth aspect.

[0192] In a twelfth aspect, a communication device is provided, comprising a processor for executing a program stored in a memory, wherein when the program is executed, the device executes the method described in the ninth aspect or the tenth aspect.

[0193] In the thirteenth aspect, a computer-readable storage medium is provided, on which a computer program or instruction is stored. When the program or instruction is executed by a processor, the method described in any aspect or any implementation of the first to sixth aspects or the ninth aspect or the tenth aspect is executed.

[0194] In a fourteenth aspect, a computer program product is provided, which, when executed on a computing device, enables the method described in any one of the first to sixth aspects, the ninth aspect, or the tenth aspect, or any one of the implementations, to be executed.

[0195] In a fifteenth aspect, a circuit is provided, the circuit being coupled to a memory, and the circuit being used to execute the method described in any one of the first to sixth aspects, the ninth aspect, or the tenth aspect, or any implementation thereof. The circuit may include a chip circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0196] FIG1 is a schematic diagram of a communication system involved in this application;

[0197] FIG2 is a schematic diagram of DMRS configuration types;

[0198] FIG3 is a schematic diagram of frequency division duplexing-orthogonal mask expansion of DMRS ports;

[0199] FIG4 is a flow chart of a communication method provided in an embodiment of the present application;

[0200] FIG5a is a schematic diagram of an association between an exemplary PTRS port and a PUSCH port provided in an embodiment of the present application;

[0201] FIG5 b is a schematic diagram of association between a PTRS port and a PUSCH port according to another example provided in an embodiment of the present application;

[0202] FIG6a is a schematic diagram of the association between a PTRS port and a PUSCH port according to another example provided in an embodiment of the present application;

[0203] FIG6 b is a schematic diagram of the association between a PTRS port and a PUSCH port according to another example provided in an embodiment of the present application;

[0204] FIG7 is a schematic diagram of the association between a PTRS port and a PUSCH port according to another example provided in an embodiment of the present application;

[0205] FIG8a is a schematic diagram of a resource structure provided in an embodiment of the present application;

[0206] FIG8b is a schematic diagram of another resource structure provided in an embodiment of the present application;

[0207] FIG9 is a simplified schematic diagram of the structure of a terminal provided in an embodiment of the present application;

[0208] FIG10 is a schematic diagram of the structure of a simplified network device provided in an embodiment of the present application;

[0209] FIG11 is a schematic structural diagram of another communication device provided in an embodiment of the present application.

[0210] FIG12 is a schematic structural diagram of another communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0211] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0212] The technical solution provided by this application can be applied to various communication systems, such as long term evolution (LTE) system, fifth generation (5G) system, th generation, 5G) communication system (also known as new radio (NR) system) and other future communication systems such as the sixth generation (6 th generation, 6G) communication systems, etc. Optionally, the technical solutions provided in this application can also be applied to Internet of Things (IoT) systems, narrowband Internet of Things (NB-IoT) systems, etc.

[0213] Figure 1 shows a schematic diagram of a communication system involved in the present application. The communication system includes at least one network device and at least one terminal. In Figure 1, a network device and multiple terminals (user equipment (UE) 1 to UE5 are shown as examples in the figure) constitute a communication system. In this communication system, UE1 to UE5 can communicate with the network device, and its link environment includes uplink, downlink and side-link transmission. The information transmitted in the link includes the actual transmitted data information and the control information used to indicate or schedule the actual data. At the same time, UE3, UE4 and UE5 can also form a communication system, and its link transmission environment is consistent with the above, and the specific information interaction depends on the configuration method of the network.

[0214] The above-mentioned network device can be a device that can communicate with the terminal. The network device can be any device with wireless transceiver functions. Including but not limited to: base stations such as NodeB, evolved base stations, such as evolved NodeB (eNodeB), base stations in the fifth generation (5G) communication system, base stations or network devices in future communication systems, access nodes in WiFi systems, wireless relay nodes, wireless backhaul nodes, etc. The network device can also be a wireless controller in a cloud radio access network (CRAN) scenario. The network device can also be a small station, a transmission reference point (TRP), etc. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network device.

[0215] The network device may also be an access node, a wireless relay node, a wireless backhaul node, etc. in a wireless local area network (wireless fidelity, WiFi) system. The network device may also be a wireless controller in a cloud radio access network (cloud radio access network, CRAN) scenario.

[0216] For ease of description, the following will take a base station as an example to illustrate the network devices involved in this application. In some deployments of the base station, the base station may include a centralized unit (CU) and a distributed unit (DU). In other deployments of the base station, the CU may also be divided into a CU-control plane (CP) and a CU-user plane (UP). In other deployments of the base station, the base station may also be an open radio access network (ORAN) architecture, etc. This application does not limit the specific deployment method of the base station.

[0217] The above-mentioned terminal is a device with wireless transceiver function, which can be deployed on land, including indoors or outdoors, handheld, wearable or vehicle-mounted; it can also be deployed on the water surface, such as on a ship; it can also be deployed in the air, such as on an airplane, a balloon and a satellite. The terminal device can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. The embodiments of the present application do not limit the application scenarios. The terminal device may also be sometimes referred to as user equipment, access terminal equipment, UE unit, mobile station, mobile station, remote station, remote terminal equipment, mobile device, terminal, wireless communication equipment, UE agent or UE device, etc.

[0218] Optionally, in the communication system shown in Figure 1, the terminals can also communicate with each other through technologies such as device to device (D2D), vehicle to everything (V2X), or machine to machine (M2M). This application does not limit the DMRS port indication method between terminals.

[0219] For example, the terms "system" and "network" in the embodiments of the present application may be used interchangeably.

[0220] The following describes concepts that may be involved in the embodiments of this application:

[0221] DMRS:

[0222] DMRS is used to estimate the equivalent channel matrix experienced by a data channel (such as the physical uplink shared channel (PUSCH) or the physical downlink shared channel (PDSCH)) or a control channel (such as the physical uplink control channel (PUCCH) or the physical downlink control channel (PDCCH)), thereby being used for data detection and demodulation. Taking PUSCH as an example, DMRS is usually precoded in the same way as the transmitted data signal, thereby ensuring that DMRS and data experience the same equivalent channel. Assuming that the DMRS vector sent by the transmitter is s and the data symbol vector sent is x, and that the DMRS and data undergo the same precoding operation (multiplied by the same precoding matrix P), the corresponding received signal vector at the receiving end can be expressed as:

[0223] data:

[0224] DMRS:

[0225] It can be seen that for both data signal and reference signal, the equivalent channels experienced are Based on the known DMRS vector s, the receiver can obtain the equivalent channel using a channel estimation algorithm (such as least squares (LS) channel estimation, minimum mean square error (MMSE) channel estimation, etc.) Based on the equivalent channel, MIMO equalization and subsequent demodulation of the data signal can be completed.

[0226] Since DMRS is used to estimate the equivalent channel Its dimension is N R ×R, where N Ris the number of receiving antennas, and R is the number of transmission streams (also called the number of transmission layers, the number of spatial layers or the rank). Generally speaking, one DMRS port corresponds to one spatial layer. One DMRS port corresponds to a group of DMRS symbols, or corresponds to a group of DMRS sequences. The DMRS symbol contains multiple DMRS symbol elements, which are mapped to the corresponding time-frequency resources for transmission. For MIMO transmission with a transmission stream number of R, the corresponding number of DMRS ports is R. In order to ensure the quality of channel estimation, different DMRS ports are usually orthogonal ports. The DMRS symbols corresponding to different DMRS ports are orthogonal in at least one of the frequency domain, time-frequency or code domain.

[0227] In some scenarios of this application, "transmission layer number" and "rank" have the same meaning and can be used interchangeably.

[0228] In some scenarios of the present application, antenna port and DMRS port have the same meaning and can be used interchangeably.

[0229] DMRS time-frequency resource mapping method in the NR protocol:

[0230] Since DMRS will occupy additional time-frequency resources, it is necessary to reduce the DMRS overhead as much as possible. In order to reduce mutual interference, the DMRS resources corresponding to multiple DMRS ports are often mapped to the preset time-frequency resources through frequency division multiplexing (FDM), time division multiplexing (TDM) or code division multiplexing (CDM). Currently, 5G NR supports two types of DMRS resource mapping. For Type 1 DMRS, a maximum of 8 orthogonal ports can be supported; for Type 2 DMRS, a maximum of 12 orthogonal ports can be supported. For a DMRS port, in order to perform channel estimation on different time-frequency resources and ensure the quality of channel estimation, multiple DMRS symbols need to be sent in multiple time-frequency resources. DMRS can occupy at least one orthogonal frequency division multiplexing (OFDM) symbol in the time domain, and the bandwidth occupied in the frequency domain is the same as the scheduling bandwidth of the scheduled data signal. Multiple DMRS symbols corresponding to a port correspond to a reference signal sequence, and a reference signal sequence includes multiple reference signal sequence elements. The DMRS reference signal sequence can be a gold sequence. Taking the DMRS reference signal sequence as a gold sequence as an example, the nth element r(n) in the reference signal sequence can be generated by the following formula:

[0231] Among them, the pseudo-random sequence c(n) can be a gold sequence with a sequence length of 31. For an output length of M PN The sequence c(n), n=0,1,...,M PN -1, can be defined as:

[0232] c(n)=(x1(n+N C )+x2(n+N C ))mod2

[0233] x1(n+31)=(x1(n+3)+x1(n))mod2

[0234] x²(n+31)=(x²(n+3)+x²(n+2)+x²(n+1)+x²(n))mod2……Formula 4

[0235] Among them, N C = 1600. The first m sequence x1(n) can be initialized to x1(0) = 1, x1(n) = 0, n = 1, 2, ..., 30. The second m sequence x2(n) is initialized by the parameter c init Initialize.c init It can be defined as:

[0236] Here l represents the OFDM symbol index contained in a time slot, Indicates the time slot index within a system frame, Can be configured by higher-layer signaling. Related to the cell identification (ID), which can usually be equal to the cell ID, It is an initialization parameter and its value can be 0 or 1. λ represents the code division multiplexing group index corresponding to the DMRS port.

[0237] The DMRS reference signal sequence corresponding to a port is multiplied by the corresponding mask sequence and mapped to the corresponding time-frequency resource according to the preset time-frequency resource mapping rules. The current NR protocol defines two types of DMRS configurations, including Type 1 DMRS and Type 2 DMRS.

[0238] For port p, the mth reference sequence element r(m) in the corresponding reference signal sequence is mapped to the index (k, l) according to the following rules: p,μ The resource element (RE) is on the resource element (RE). The index is (k, l) p,μThe RE corresponds to the OFDM symbol with index l in a time slot in the time domain and to the subcarrier with index k in the frequency domain. The mapping rule satisfies:

[0239] k′=0,1;

[0240] n=0,1,…;

[0241] l′=0,1.

[0242] Among them, μ is the subcarrier spacing parameter, To map to index (k,l) p,μ The DMRS signal symbol corresponding to port p on the RE, It is the symbol index of the starting OFDM symbol occupied by the DMRS signal symbol or the symbol index of the reference OFDM symbol. is the power scaling factor, w t (l′) is the time domain mask element corresponding to the OFDM symbol indexed as l′, w f (k′) is the frequency domain mask element corresponding to the subcarrier indexed by k′, m=2n+k′, and Δ is the subcarrier offset factor.

[0243] For the configuration type 1 (Type 1 DMRS) mapping rule, the DMRS port p corresponds to w f (k′), w t (l′), and the value of Δ can be determined according to Table 1:

[0244] Table 1 Type 1 DMRS parameter values

[0245] Among them, type 1 DMRS can support a maximum of 8 orthogonal ports (1000-1007), p represents the DMRS port number, λ represents the code division multiplexing group index corresponding to the DMRS port, Δ is the subcarrier offset factor, w t (l′) is the time domain mask element corresponding to the OFDM symbol indexed as l′, w f (k′) is the frequency domain mask element corresponding to the subcarrier indexed by k′.

[0246] For the configuration type 2 (Type 2 DMRS) mapping rule, the DMRS port p corresponds to w f (k′), w t (l′), and the value of Δ can be determined according to Table 2:

[0247] Table 2 Type 2 DMRS parameter values

[0248] Type 2 DMRS can support up to 12 orthogonal ports (1000-1011). λ is the index of the code division multiplexing group to which port p belongs. DMRS ports within the same code division multiplexing group occupy the same time-frequency resources. According to equation (1), the time-frequency resource mapping for Type 1 single-symbol DMRS and dual-symbol DMRS is shown in the first and second figures from the left of Figure 2.

[0249] As shown in the first figure from the left of Figure 2, for single-symbol DMRS (corresponding to l′=0), a maximum of 4 ports are supported, and the DMRS resource occupies one OFDM symbol. The 4 DMRS ports are divided into 2 code division multiplexing groups (CDM groups), where CDM group 0 contains port 0 and port 1; CDM group 1 contains port 2 and port 3. CDM group 0 and CDM group 1 are frequency division multiplexed (mapped on different frequency domain resources). The DMRS ports contained in the CDM group are mapped on the same time-frequency resources. The reference signals corresponding to the DMRS ports contained in the CMD group are distinguished by an orthogonal cover code (OCC), thereby ensuring the orthogonality of the DMRS ports in the CDM group, thereby suppressing interference between DMRS transmitted on different antenna ports. Specifically, port 0 and port 1 are located in the same RE, and resource mapping is performed in a comb-tooth manner in the frequency domain, that is, the adjacent frequency domain resources occupied by port 0 and port 1 are separated by one subcarrier. For a DMRS port, the two adjacent occupied REs correspond to an OCC codeword sequence of length 2. For example, for subcarriers 0 and 2, ports 0 and 1 use a set of OCC codeword sequences of length 2 (+1+1 and +1-1). Similarly, ports 2 and 3 are located in the same RE and are mapped to the unoccupied REs of ports 0 and 1 in a comb-tooth manner in the frequency domain. For subcarriers 1 and 3, ports 2 and 3 use a set of OCC codeword sequences of length 2 (+1+1 and +1-1).

[0250] As shown in the second figure from the left of Figure 2, for dual-symbol DMRS, a maximum of 8 ports are supported. The 8 DMRS ports are divided into 2 code division multiplexing groups, where CDM group 0 includes port 0, port 1, port 4, and port 5; CDM group 1 includes port 2, port 3, port 6, and port 7. CDM group 0 and CDM group 1 are frequency division multiplexed, and the reference signals corresponding to the DMRS ports included in the CDM group are distinguished by OCC. Specifically, port 0, port 1, port 4, and port 5 are located in the same RE, and resource mapping is performed in a comb-tooth manner in the frequency domain, that is, the adjacent frequency domain resources occupied by port 0, port 1, port 4, and port 5 are separated by one subcarrier. For a DMRS port, the two adjacent subcarriers and two OFDM symbols occupied correspond to an OCC codeword sequence of length 4. For example, for subcarrier 0 and subcarrier 2 corresponding to OFDM symbol 1 and OFDM symbol 2, ports 0, 1, 4, and 5 use a set of OCC codes with a length of 4 (+1+1+1+1 / +1+1-1-1 / +1-1+1-1 / +1-1-1+1). Similarly, ports 2, 3, 6, and 7 are located in the same RE and are mapped to the unoccupied subcarriers of ports 0, 1, 4, and 5 in a comb-tooth manner in the frequency domain. For subcarrier 1 and subcarrier 3 corresponding to OFDM symbol 1 and OFDM symbol 2, ports 2, 3, 6, and 7 use a set of OCC codes with a length of 4 (+1+1+1+1 / +1+1-1-1 / +1-1+1-1 / +1-1-1+1).

[0251] For configuration type 2, the time-frequency resource mapping method for single-symbol DMRS and dual-symbol DMRS is shown in the third and fourth figures from the left of Figure 2. As shown in the third figure from the left of Figure 2, for single-symbol Type 2 DMRS, a maximum of 6 ports are supported. The 6 DMRS ports are divided into 3 code division multiplexing groups. Frequency division multiplexing is used between CDM groups. The reference signals corresponding to the DMRS ports included in the CDM are guaranteed to be orthogonal through OCC. Among them, CDM group 0 contains port 0 and port 1; CDM group 1 contains port 2 and port 3; CDM group 2 contains port 4 and port 5. Frequency division multiplexing is used between CDM groups (mapped on different frequency domain resources). The reference signals corresponding to the DMRS ports included in the CMD group are mapped on the same time-frequency resources. The reference signals corresponding to the DMRS ports included in the CMD group are distinguished by OCC. For a DMRS port, its corresponding DMRS reference signal is mapped in the frequency domain to multiple resource subblocks containing two consecutive subcarriers, and adjacent resource subblocks are separated by four subcarriers in the frequency domain. Specifically, port 0 and port 1 are located in the same RE, and resource mapping is performed in a comb-tooth manner. Taking the frequency domain resource granularity of 1 resource block (RB) as an example, port 0 and port 1 occupy subcarrier 0, subcarrier 1, subcarrier 6 and subcarrier 7. Port 2 and port 3 occupy subcarrier 2, subcarrier 3, subcarrier 8 and subcarrier 9. Port 4 and port 5 occupy subcarrier 4, subcarrier 5, subcarrier 10 and subcarrier 11. For the two DMRS ports included in a CDM group, the corresponding OCC codeword sequences of length 2 (+1+1 and +1-1) are in the two adjacent subcarriers.

[0252] As shown in the fourth figure from the left of Figure 2, for dual-symbol Type 2 DMRS, a maximum of 12 ports are supported. The 12 DMRS ports are divided into three CDM groups, and frequency division multiplexing is used between CDM groups. The reference signals corresponding to the DMRS ports contained in the CDM are orthogonalized by OCC. Among them, CDM group 0 contains port 0, port 1, port 6 and port 7; CDM group 1 contains port 2, port 3, port 8 and port 9; CDM group 2 contains port 4, port 5, port 10 and port 11. Frequency division multiplexing is used between CDM groups (mapped to different frequency domain resources). The reference signals corresponding to the DMRS ports contained in the CMD group are mapped to the same time-frequency resources. The reference signals corresponding to the DMRS ports contained in the CMD group are distinguished by OCC. For a DMRS port, its corresponding DMRS reference signal is mapped in the frequency domain to multiple resource subblocks containing two consecutive subcarriers, and the adjacent resource subblocks are separated by 4 subcarriers in the frequency domain. Specifically, the ports included in a CDM group are located in the same RE, and resource mapping is performed in a comb-tooth manner in the frequency domain. Taking the frequency domain resource granularity of 1RB as an example, port 0, port 1, port 6, and port 7 occupy subcarrier 0, subcarrier 1, subcarrier 6, and subcarrier 7 corresponding to OFDM symbol 1 and OFDM symbol 2. Port 2, port 3, port 8, and port 9 occupy subcarrier 2, subcarrier 3, subcarrier 8, and subcarrier 9 corresponding to OFDM symbol 1 and OFDM symbol 2. Port 4, port 5, port 10, and port 11 occupy subcarrier 4, subcarrier 5, subcarrier 10, and subcarrier 11 corresponding to OFDM symbol 1 and OFDM symbol 2. For the four DMRS ports included in a CDM group, an OCC codeword sequence of length 4 (+1+1+1+1 / +1+1-1-1 / +1-1+1-1 / +1-1-1+1) corresponds to the two adjacent subcarriers corresponding to the two OFDM symbols.

[0253] As wireless communication equipment deployment becomes denser in the future and the number of terminals continues to grow, higher demands will be placed on the number of MIMO transmission streams. Furthermore, with the continued evolution of massive MIMO systems, the number of transmit and receive antennas will further increase (network equipment will support 128 transmit antennas (T) or 256 T, and terminals will have 8 receive antennas (R)). This will allow for more accurate channel information acquisition, further supporting higher numbers of transmission streams and improving the spectral efficiency of MIMO systems. These factors will inevitably require more DMRS ports to support higher numbers of transmission streams (greater than 12). As the number of transmission streams increases, the accuracy of channel estimation becomes even higher. However, the current maximum of 12 orthogonal ports cannot guarantee good performance for transmissions exceeding 12 streams.

[0254] The simplest way to expand the number of existing orthogonal DMRS ports is to increase the time-frequency resources occupied by DMRS. This method can ensure that the number of DMRS symbols corresponding to each DMRS port remains unchanged. However, the exponential increase in DMRS overhead will also exponentially reduce the system's spectral efficiency. Another method is to reuse the DMRS resources corresponding to more orthogonal DMRS ports while ensuring the same time-frequency resources (overhead). In order to avoid adding additional time-frequency resource overhead, introducing new DMRS ports through code division multiplexing enhancement (increasing the number of DMRS sequences within the same time-frequency resources) on the basis of existing NR DMRS ports is one of the effective technical solutions.

[0255] Code division multiplexing (CDM) is an effective method for introducing more orthogonal DMRS ports within the same time-frequency resources. Corresponding to existing NR DMRS design guidelines, a possible CDM implementation method is as follows. Taking single-symbol Type 2 DMRS as an example, for other DMRS configuration types, frequency division duplexing-orthogonal cover code (FD-OCC) expansion can also be performed in the following manner. The corresponding diagram for this expansion method is shown in Figure 3.

[0256] As shown in Figure 3, the left figure shows the DMRS port configuration of the existing NR protocol. The upper left table in the figure shows the subcarrier numbers (identifiers, IDs) occupied by DMRS (subcarriers No. 0-11) and the corresponding port indexes. The lower left figure takes port P0 and port P1 as examples to illustrate the corresponding DMRS mask design method. Taking DMRS ports P0 and P1 as an example, the frequency domain subcarrier numbers occupied in a resource block (resource block, RB) are {0, 1, 6, 7}, the mask sequence corresponding to the P0 port is {+1, +1, +1, +1}, and the mask sequence corresponding to the P1 port is {+1, -1, +1, -1}. The P1 port occupies the same time-frequency resources as the P0 port and is transmitted on the same time-frequency resources as the P0 port through code division orthogonality. The mask sequence here refers to the corresponding frequency domain mask sequence in Table 1.

[0257] Corresponding to the existing solution on the left, the upper table on the right and the lower figure on the right present a new DMRS FD-OCC expansion solution. In the figure, DMRS ports P0, P1, P6, and P7 belonging to the same CDM group 0 are used as an example. Corresponding to the same CDM group, the DMRS ports in this solution multiplex a group of ports (2 ports: P6 and P7) through code division multiplexing within the same time-frequency resources, compared to the DMRS ports in the above-mentioned existing solution. The corresponding mask sequences on subcarrier numbers {0, 1, 6, 7} are {+1, +1, -1, -1} and {+1, -1, -1, +1}. The multiplexing method for the remaining CDM groups is the same as that for CDM group 0. Through this technical means, the total number of DMRS ports multiplexed within the same time-frequency resources can be doubled.

[0258] This expansion method can be naturally extended to single / double symbol and Type 1 / 2 DMRS configurations using the same sequence and mapping. The corresponding DMRS port and time-frequency resource mapping for this expansion method is shown in Table 3-6.

[0259] Exemplarily, a sequence used in the expansion method is an interference randomization sequence:

[0260] Table 3 Parameter values ​​corresponding to different DMRS ports (Type 1)

[0261] Table 4 Parameter values ​​corresponding to different DMRS ports (Type 2)

[0262] Exemplarily, another sequence used in the expansion method is the Walsh sequence:

[0263] Table 5 Parameter values ​​corresponding to different DMRS ports (Type 1)

[0264] Table 6 Parameter values ​​corresponding to different DMRS ports (Type 2)

[0265] There is an association between the PTRS port and the DMRS port. The time-frequency resource position for sending the PTRS signal at the PTRS port can be determined according to the associated DMRS port. The base sequence corresponding to the PTRS signal and the DMRS signal is the same, that is, it only contains the corresponding r(2n+k′) in the DMRS signal generation formula (i.e., the above formula 5), ​​and does not contain the time-frequency mask w f (k′) and w t (l′).

[0266] Specifically, the time-frequency resource mapping of the PTRS port is as follows:

[0267] Where l is the time domain position corresponding to the PTRS signal; k is the frequency domain position corresponding to the PTRS signal; p is the port number; μ is the subcarrier spacing; β PT-RS,i is the power coefficient; r k is a base sequence.

[0268] Among them, the value of the time domain position l corresponding to the PTRS signal is related to the time domain density L PT-RS The parameters are not described in detail in this application.

[0269] The formula for determining the frequency domain position k corresponding to the PTRS signal is as follows:

[0270] Among them, if N RB modK PT-RS =0, then

[0271] otherwise,

[0272] Wherein, i=0, 1, 2... (is the RB offset index where PTRS exists).

[0273] It is the subcarrier offset between the PTRS port and the DMRS port associated with it within the RB where each PTRS port exists. As shown in Table 7 below:

[0274] Table 7 Parameters

[0275] The candidate DMRS ports that can be associated with the PTRS ports specified in the current NR protocol are shown in Table 7 above. For Type 1 DMRS, the candidate DMRS ports are 1000, 1001, 1002, and 1003; for Type 2 DMRS, the candidate DMRS ports are 1000, 1001, 1002, 1003, 1004, and 1005.

[0276] For each DMRS configuration type, any of the following subcarrier offsets can be configured through higher-layer signaling: offset00, offset01, offset10, offset11.

[0277] According to Table 7, if the configured subcarrier offset is offset00, the frequency domain starting subcarrier corresponding to the PTRS port and the associated DMRS port in the sending RB is the same (the subcarrier offset is 0); if other subcarrier offset values ​​are configured, such as offset01, the frequency domain starting subcarrier corresponding to the PTRS port and the associated DMRS port in the sending RB is offset by 2 subcarriers; and so on.

[0278] The resource element offset (resourceElementOffset) field in the higher-level parameter "Phase Tracking Reference Signal - Downlink Configuration (PTRS-DownlinkConfig)" can be used to configure any of the subcarrier offsets: offset01, offset10, or offset11. If the resourceElementOffset field is not present in the higher-level parameter PTRS-DownlinkConfig, the default subcarrier offset is offset00.

[0279] In the above formula for determining the value of the frequency domain position k corresponding to PTRS:

[0280] n RNTI It is the value of the radio network temporary identity (RNTI) corresponding to the DMRS port scheduled by the current DCI.

[0281] N RB is the number of RBs scheduled at that time.

[0282] K PT-RS ∈{2,4} is the PTRS frequency density, in RB.

[0283] Corresponding to the time domain density L in the time-frequency resources occupied by the above PTRS port PT-RS The NR protocol defines the value range as shown in Table 8 below:

[0284] Table 8 PT-RS time domain density as a function of scheduled bandwidth

[0285] Among them, l MCS is the MCS of the current scheduling, ptrs-MCS1~4 is the MCS threshold range configured by the higher layer, L PT-RS The density of the PTRS in the time domain indicates the symbol interval of the PTRS in a time slot. A value of 1 means that the PTRS is sent in each time domain OFDM symbol.

[0286] Corresponding to the frequency domain density K in the time-frequency resources occupied by the above PTRS port PT-RS The NR protocol defines the value range as shown in Table 9 below:

[0287] Table 9 PT-RS frequency domain density as a function of scheduled bandwidth

[0288] Among them, N RB is the number of RBs scheduled at that time, N RB0～1 K is the RB threshold range configured by the higher layer. PT-RS The density of the PTRS in the frequency domain mentioned above indicates the RB interval at which the PTRS appears within a scheduling bandwidth. A value of 2 means that the PTRS is sent once on every two frequency domain RBs.

[0289] The following describes the transmission time-frequency resources corresponding to PTRS port 0, taking the DMRS configuration type as type 2 and the DMRS port after single symbol FD-OCC expansion as an example, as shown in Table 10:

[0290] Table 10 shows the relationship between the PTRS port and the DMRS port.

[0291] In Table 10, the PTRS port is associated with DMRS port 1000, the PTRS frequency domain density is 2RB (1RB=12RE), the PTRS time domain density is 2 OFDM symbols, and the subcarrier offset corresponding to the DMRS port associated with the configured PTRS port is offset00. The time-frequency position of PTRS port 0 is shown in Table 10.

[0292] Regarding the association between PTRS ports and DMRS ports, the NR standard also defines the indication method of this association as follows:

[0293] The Phase Tracking Reference Signal-Demodulation Reference Signal Association (PTRS-DMRS association) field in the DCI can be used to indicate the PTRS-DMRS association relationship. This indication has two possibilities: 0 or 2 bits.

[0294] When the PTRS-DMRS association field is 0 bits, indicating that the PTRS-DMRS association field does not exist, or the maximum rank (maxRank) = 1, since no PTRS port is configured or there is only one candidate DMRS port, there is no need to associate the PTRS port with the DMRS port.

[0295] When the PTRS-DMRS association field is 2 bits, the selection table for the maximum number of PTRS ports configured according to the PTRS-DMRS association field is as follows:

[0296] Table 11 PTRS-DMRS association relationship corresponding to PTRS port 0

[0297] Among them, Table 11 corresponds to the configuration of the PTRS port number being 1 (i.e., PTRS port 0), and indicates one of the maximum four candidate DMRS ports (i.e., the scheduled DMRS ports) through the PTRS-DMRS association field, determines the index of the DMRS port associated with the PTRS port 0, and determines the PTRS sequence and time-frequency resource mapping method according to the DMRS port index and the aforementioned PTRS time-frequency resource mapping rules.

[0298] Similarly, the following Table 12 corresponds to the configuration of PTRS port number 2 (ie, PTRS port 0 and PTRS port 1):

[0299] Table 12 PTRS-DMRS association relationship between uplink PTRS port 0 and port 1

[0300] Among them, the most significant bit (MSB) of the PTRS-DMRS association field is used to indicate the DMRS port sharing PTRS port 0; the least significant bit (LSB) of the PTRS-DMRS association field is used to indicate the DMRS port sharing PTRS port 1.

[0301] Alternatively, the MSB of the PTRS-DMRS association field may also be used to indicate the DMRS port that shares the PTRS port 1; and the LSB of the PTRS-DMRS association field may also be used to indicate the DMRS port that shares the PTRS port 0.

[0302] This application additionally introduces the concept of an antenna coherence group to further illustrate the association between the PTRS port and the DMRS port. It should be noted that according to the existing NR protocol, the configuration scenario with a PTRS port number of 2 generally occurs in the partially coherent and non-coherent uplink precoding matrix transmission (UL Codebook based transmission) mode; correspondingly, the above-mentioned configuration with a PTRS port number of 1 generally occurs in the full-coherent uplink precoding matrix transmission mode.

[0303] Here we briefly use the following precoding matrix to illustrate the physical meaning of the antenna coherence group.

[0304] Full coherence means that all antenna ports can send the same stream of data;

[0305] Partial coherence means that some antenna ports can send the same stream data;

[0306] Non-coherent means that each antenna port can only send one type of data.

[0307] Taking Table 13 below as an example, the transmission precoding matrix index (TPMI) set corresponds to uplink 4-stream (i.e., 4-transmit, 4-stream) transmission under 4 transmitting antennas of the terminal. The precoding matrix corresponding to precoding matrix 0 (i.e., TPMI index = 0) can be understood as incoherent transmission, the precoding matrices corresponding to precoding matrix 1 (i.e., TPMI index = 1) and precoding matrix 2 (i.e., TPMI index = 2) can be understood as partially coherent transmission, and the precoding matrices corresponding to precoding matrix 3 (i.e., TPMI index = 3) and precoding matrix 4 (i.e., TPMI index = 4) can be understood as fully coherent transmission. Through this example, it is relatively intuitive to understand that for the uplink precoding matrix of 4-transmit, 4-stream, a row of the precoding matrix corresponds to a PUSCH antenna port / sounding reference signal (SRS) port, and a column of the precoding matrix corresponds to an uplink transmission stream (which can also be understood as a DMRS port).

[0308] Table 13 Precoding matrix W for 4-stream transmission using 4 antenna ports

[0309] For PTRS, for partially coherent and non-coherent uplink precoding matrix transmission, the actual number of PTRS ports sent depends on the uplink TPMI form and the maximum number of streams:

[0310] For partially coherent and non-coherent antenna configurations, PUSCH port 0 and PUSCH port 2 share PTRS port 0, and PUSCH port 1 and PUSCH port 3 share PTRS port 1 (it can be understood that this determines the mapping of PUSCH port to PTRS port, and on which PUSCH port PTRS is sent); at the same time, PTRS port 0 is associated with the uplink 'x'th stream, and PTRS port 1 is associated with the uplink 'y'th stream, and the x and y are determined according to the above Table 12 (indicated by DCI).

[0311] For the specific case of a single terminal supporting a maximum of 8 physical uplink shared channel (PUSCH) ports / sounding reference signal (SRS) ports for uplink, and / or supporting a maximum of 4 uplink stream transmissions for a single terminal, there is currently no corresponding solution for how to specify the specific association between PTRS ports and DMRS ports.

[0312] In view of this, the present application provides a communication solution that, under a specific configuration, indicates through the first indication information in the DCI that the first PTRS port is associated with at least one DMRS port, and / or the second PTRS port is associated with at least one DMRS port, thereby solving the problem of unclear definition of the PTRS-DMRS association relationship caused by the reuse of the legacy criterion in certain characteristic cases. At the same time, through this simplified indication method, while ensuring performance, it also saves DCI overhead. Through this indication method, in a scenario where 8-port PUSCH transmission and the maximum Rank <= 4 are used, the PTRS-DMRS association relationship indication of the DCI can be used to notify the UE to associate the PTRS with the DMRS port with the best performance, thereby ensuring the transmission performance of the PTRS.

[0313] As shown in FIG4 , the method may include the following steps:

[0314] S401. The network device sends RRC signaling, and correspondingly, the terminal receives the RRC signaling.

[0315] Exemplarily, the uplink PTRS signal may be configured by the "Phase Tracking Reference Signal - Uplink Configuration (PTRS-UplinkConfig)" or "Phase Tracking Reference Signal - Downlink Configuration (PTRS-DownlinkConfig)" information element in the high-layer parameter RRC signaling.

[0316] The RRC signaling can be used to configure the maximum number of uplink PTRS ports. For example, the maximum number of uplink PTRS ports can be configured using the higher-layer parameter maxNrofPorts in the PTRS-UplinkConfig information element.

[0317] Assuming that the number of PUSCH ports shared by a PTRS port is greater than or equal to the number of PUSCH ports corresponding to the first stream, it can be understood that when Ng = 2, the first stream data is sent by a maximum of 4 PUSCH ports, and a PTRS port can correspond to at least 4 PUSCH ports, that is, the maximum number of PTRS ports is <= 2. When Ng = 4, the first stream data is sent by a maximum of 2 PUSCH ports, and the maximum number of PTRS ports is <= 4.

[0318] That is, the following relationship between Ng and the number of PTRS ports can be obtained:

[0319] When Ng=1, the maximum number of uplink PTRS ports is 1;

[0320] When Ng=2, the maximum number of uplink PTRS ports is 2 or 1;

[0321] When Ng=4, the maximum number of uplink PTRS ports is 4, 2, or 1.

[0322] The network device may configure the number of Ng through RRC signaling, or the terminal may also report the number of Ng. For example, the number of Ng is 1, 2, or 4.

[0323] The network device can configure the maximum number of uplink PTRS ports through high-level signaling (for example, RRC signaling). For example, the network device can send a first message, and the first message is used to configure the maximum number of uplink PTRS ports, Q≤M. The first message is a high-level signaling such as RRC. In the above-mentioned scenario of 8-port PUSCH transmission and maximum Rank<=4, when Ng=1, M can be 1; when Ng=2, M can be 2; when Ng=4, M can be 4. Exemplarily, when the maximum number of uplink PTRS ports is 1, the network device configures "n1"; when the maximum number of uplink PTRS ports is 2, the network device configures "n1", "n2"; when the maximum number of uplink PTRS ports is 4, the network device configures "n1", "n2", and "n4".

[0324] Alternatively, the terminal may report the maximum number of uplink PTRS ports supported. For example, the terminal may report the maximum number of uplink PTRS ports supported as M, where M is a positive integer.

[0325] For example, the terminal reports the maximum number of uplink PTRS ports supported. When the maximum number of PTRS ports is 1, the terminal reports "n1"; when the maximum number of PTRS ports is 2, the terminal reports "n1" and "n2"; when the maximum number of PTRS ports is 4, the terminal reports "n1", "n2" and "n4".

[0326] The RRC signaling can also be used to configure the current PTRS port of the terminal.

[0327] The RRC signaling can also be used to configure the subcarrier offset between the PTRS port and the DMRS port associated with it. The subcarrier offset can be any one of offset00, offset01, offset10, and offset11 in Table 7 above. Exemplarily, any one of offset01, offset10, and offset11 subcarrier offsets can be configured by the resource element offset (resourceElementOffset) field in the high-level parameter "Phase Tracking Reference Signal-Uplink Configuration (PTRS-UplinkConfig)" or "Phase Tracking Reference Signal-Downlink Configuration (PTRS-DownlinkConfig)". If there is no resourceElementOffset field in the high-level parameter PTRS-UplinkConfig or PTRS-DownlinkConfig, the default subcarrier offset is "offset00".

[0328] The RRC signaling can also be used to configure one or more MCS threshold ranges. As shown in Table 8, RRC signaling configures the following MCS threshold ranges: ptrs-MCS1 to 4. For example, the RRC field can be frequencyDensity, which can take two values ​​from the integer {1...276}:

[0329] SEQUENCE(SIZE(2))OF INTEGER(1…276)OPTIONAL,--Need S

[0330] The RRC signaling can also be used to configure one or more RB threshold ranges. As shown in Table 9, the RRC signaling configures the following RB threshold ranges: N RB0～1 .

[0331] Exemplarily, the RRC field may be timeDensity.

[0332] The value can be any of the following three integers {0...29}:

[0333] SEQUENCE(SIZE(3))OF INTEGER(1…29)OPTIONAL,--Need S

[0334] In this embodiment, each PTRS port in at least one PTRS port corresponds to multiple Ng groups. Each Ng in the multiple Ng groups corresponds to multiple PUSCH ports, or each Ng in the multiple Ng groups corresponds to multiple SRS ports. The correspondence between Ng and SRS ports is similar to the correspondence between Ng and PUSCH ports. This embodiment uses the correspondence between Ng and PUSCH ports as an example for description. The network device may send at least one of the following information to the terminal: the rank of the uplink PUSCH and the TPMI. The terminal may determine the above-mentioned precoding matrix based on the uplink PUSCH rank and TPMI, thereby determining at least one PTRS port. The precoding matrix includes X PUSCH ports and Y data layers, each data layer corresponding to a DMRS port, where X is equal to 8; or X is equal to 8 and Y is less than 4. The X PUSCH ports are reported by the terminal or configured by the network device, and the X PUSCH ports are associated with the above-mentioned M PTRS ports according to predefined rules.

[0335] For example, when Ng=1, the maximum number of PTRS ports supported by the terminal / configured by the network device is 1, and the network device can configure 1 PTRS port (PTRS port 0) for the terminal through high-level signaling. Then, according to predefined rules, PTRS port 0 can be associated with PUSCH ports 0-7.

[0336] Exemplarily, when Ng=2, the network device configures or predefines Ng0 to correspond to PUSCH ports 0-3, and Ng1 to correspond to PUSCH ports 4-7. The description of the correspondence between Ng and PUSCH ports in this embodiment is only an example and is not limiting. The maximum number of PTRS ports supported by the terminal / configured by the network device is 2. The network device can configure one PTRS port (PTRS port 0) for the terminal. Then, according to the predefined rules, PTRS port 0 can be associated with PUSCH ports 0-7, and PTRS port 0 corresponds to two Ngs; the network device can also configure two PTRS ports (PTRS port 0 and PTRS port 1) for the terminal, and as shown in Figure 5a, PUSCH ports 0-3 correspond to one Ng, and PUSCH ports 4-7 correspond to another Ng. Then, according to the predefined rules, PTRS port 0 can be associated with PUSCH ports 0-3, PTRS port 1 can be associated with PUSCH ports 4-7, and one PTRS port corresponds to one Ng.

[0337] When Ng=2, the network device may also configure or predefine Ng0 to correspond to PUSCH ports 0, 2, 4, and 6, and Ng1 to correspond to PUSCH ports 1, 3, 5, and 7. The description of the correspondence between Ng and PUSCH ports in this embodiment is only an example and is not limiting. The maximum number of PTRS ports supported by the terminal / configured by the network device is 2. The network device can configure one PTRS port (PTRS port 0) for the terminal. According to the predefined rules, PTRS port 0 can be associated with PUSCH ports 0-7, and PTRS port 0 corresponds to 2 Ngs; the network device can also configure two PTRS ports (PTRS port 0 and PTRS port 1) for the terminal, and as shown in Figure 5b, PUSCH ports 0, 2, 4, and 6 correspond to one Ng, and PUSCH ports 1, 3, 5, and 7 correspond to another Ng. According to the predefined rules, PTRS port 0 can be associated with PUSCH ports 0, 2, 4, and 6, and PTRS port 1 can be associated with PUSCH ports 1, 3, 5, and 7, and 1 PTRS port corresponds to 1 Ng.

[0338] When Ng=4, the maximum number of PTRS ports supported by the terminal / configured by the network device is 4. The network device can configure 1, 2, 3, or 4 PTRS ports for the terminal. When the network device configures 1, 2, or 3 PTRS ports for the terminal, one PTRS port can correspond to multiple Ngs.

[0339] For example, as shown in Figure 6a, Ng=4, where PUSCH ports 0-1 belong to Ng0, PUSCH ports 2-3 belong to Ng1, PUSCH ports 4-5 belong to Ng2, and PUSCH ports 6-7 belong to Ng4. The network device configures 4 PTRS ports for the terminal, 1 PTRS port corresponds to 1 Ng. Then, according to the predefined rules, PTRS port p0 corresponds to PUSCH ports 0-1, PTRS port p1 corresponds to PUSCH ports 2-3, PTRS port p2 corresponds to PUSCH ports 4-5, and PTRS port p3 corresponds to PUSCH ports 6-7.

[0340] For another example, as shown in Figure 6b, Ng=4, where PUSCH ports 0 and 4 belong to Ng0, PUSCH ports 1 and 5 belong to Ng1, PUSCH ports 2 and 6 belong to Ng2, and PUSCH ports 3 and 7 belong to Ng4. The network device configures 4 PTRS ports for the terminal, and 1 PTRS port corresponds to 1 Ng. Then, according to the predefined rules, PTRS port p0 corresponds to PUSCH ports 0 and 4, PTRS port p1 corresponds to PUSCH ports 1 and 5, PTRS port p2 corresponds to PUSCH ports 2 and 6, and PTRS port p3 corresponds to PUSCH ports 3 and 7.

[0341] For another example, as shown in Figure 6b, Ng=4, where PUSCH ports 0 and 4 belong to Ng0, PUSCH ports 1 and 5 belong to Ng1, PUSCH ports 2 and 6 belong to Ng2, and PUSCH ports 3 and 7 belong to Ng4. The network device configures 2 PTRS ports for the terminal, and 1 PTRS port corresponds to 2 Ngs. According to the predefined rules, PTRS port p0 corresponds to PUSCH ports 0, 2, 4, and 6, and PTRS port p1 corresponds to PUSCH ports 1, 3, 5, and 7.

[0342] For another example, as shown in Figure 7, Ng=4, where PUSCH ports 0-1 belong to Ng0, PUSCH ports 2-3 belong to Ng1, PUSCH ports 4-5 belong to Ng2, and PUSCH ports 6-7 belong to Ng4. The network device configures 2 PTRS ports for the terminal, and 1 PTRS port corresponds to 2 Ngs. According to the predefined rules, PTRS port p0 corresponds to PUSCH ports 0-3, and PTRS port p1 corresponds to PUSCH ports 4-6.

[0343] As can be seen, in this embodiment, one PTRS port can correspond to one or more Ngs, where each Ng corresponds to multiple PUSCH ports. In the prior art, in a 4-transmit, 4-stream scenario, for incoherent transmission, one PTRS port corresponds to two Ngs, and one Ng corresponds to one PUSCH port; for partially coherent transmission, one PTRS port corresponds to one Ng, and one Ng corresponds to two PUSCH ports; for fully coherent transmission, one PTRS port corresponds to one Ng, and one Ng corresponds to four PUSCH ports.

[0344] Specifically, for 8-port PUSCH transmission, there are 8 PUSCH ports numbered 0 to 7. When the number of PTRS ports is 2, there are two PTRS ports, PTRS port 0 and PTRS port 1. PTRS port 0 corresponds to PUSCH antenna ports {0, 1, 4, 5}, and PTRS port 1 corresponds to PUSCH antenna ports {2, 3, 6, 7}. In other words, PUSCH antenna ports {0, 1, 4, 5} share PTRS port 0, and PUSCH antenna ports {2, 3, 6, 7} share PTRS port 1. It should be noted that the PUSCH port here can also be an SRS port or an uplink antenna port.

[0345] Specifically, for 8-port PUSCH transmission, there are 8 PUSCH ports numbered 0 to 7. When the number of PTRS ports is 2, there are two PTRS ports, PTRS port 0 and PTRS port 1. PTRS port 0 corresponds to PUSCH antenna ports {0, 2, 4, 6}, and PTRS port 1 corresponds to PUSCH antenna ports {1, 3, 5, 7}. In other words, PUSCH antenna ports {0, 2, 4, 6} share PTRS port 0, and PUSCH antenna ports {1, 3, 5, 7} share PTRS port 1. It should be noted that the PUSCH port here can also be an SRS port or an uplink antenna port.

[0346] The above describes the association relationship between the PTRS port and the PUSCH port. The association relationship between the PTRS port and the PUSCH port can be determined according to a predefined rule. The following describes the association relationship between the PTRS port and the DMRS port:

[0347] S402. The network device sends DCI, and correspondingly, the terminal receives the DCI.

[0348] The DCI may include first indication information, where the first indication information is used to indicate that a first phase tracking reference signal PTRS port is associated with at least one first demodulation reference signal DMRS port and / or that a second PTRS port is associated with at least one second DMRS port.

[0349] Specifically, the PTRS-DMRS association field in the DCI may be used to indicate the association relationship between the PTRS port and the DMRS port. The first indication information may be the value corresponding to the PTRS-DMRS association field or the PTRS-DMRS association domain in the DCI.

[0350] The at least one first DMRS port or the at least one second DMRS port may be indicated by an antenna port field, and the antenna port field may be sent through DCI.

[0351] As mentioned above, the number of PTRS ports can be configured through RRC signaling. For example, two PTRS ports are configured by maxNrofPorts in PTRS-UplinkConfig.

[0352] Similarly, RRC signaling can also indicate the presence or absence of the SRS resource set identifier field, if the SRS resource set field exists and the DCI indicates that the SRS resource set identifier field is equal to "00" or "01" (SRS resource set indicator field is absent or SRS resource set indicator field is present and equals"00"or"01"); RRC signaling can also indicate that the maximum rank is less than or equal to 4 (maxRank<=4).

[0353] The terminal device may report the number of ports used for PUSCH transmission, for example, by indicating 8-port PUSCH transmission (the number of PUSCH antenna ports equals to 8) through UE capability indication information. Alternatively, the network device may indicate the number of ports for PUSCH transmission to the terminal device through RRC signaling, such as 8-port PUSCH transmission.

[0354] It should be noted that the scheduling DMRS port shared by the first PTRS port corresponds to the sounding reference signal SRS resource indication field and / or precoding information and rank indication field, and the scheduling DMRS port shared by the second PTRS port corresponds to the sounding reference signal SRS resource indication field and / or precoding information and rank indication field. That is, the scheduling DMRS port shared by the first PTRS port and / or the scheduling DMRS port shared by the second PTRS port can be determined by the sounding reference signal SRS resource indication field and / or precoding information and rank indication field. Alternatively, the first PTRS port is associated with the at least one first DMRS port corresponding to the sounding reference signal SRS resource identifier field and / or precoding information and rank field, or the second PTRS port is associated with the at least one second DMRS port corresponding to the SRS resource identifier field and / or precoding information and rank field.

[0355] The following describes how to associate a DMRS port with a PTRS port when at least one of the following conditions is met:

[0356] 1) The maximum number of PTRS ports is 2;

[0357] 2) The presence or absence of the SRS resource set identifier field. If the SRS resource set identifier field exists and the DCI indicates that the SRS resource set identifier field is equal to "00" or "01";

[0358] 3) The maximum rank is less than or equal to 4;

[0359] 4) The number of PUSCH ports is 8.

[0360] When the number of configured PTRS ports is 2, the PTRS ports may include a first PTRS port and a second PTRS port, the first PTRS port may be PTRS port 0, and the second PTRS port may be PTRS port 1.

[0361] A PTRS port may be associated with at least one DMRS port, and the associated DMRS port may be understood as a scheduled DMRS port shared by the PTRS port, or a DMRS port corresponding to the PTRS port, or a DMRS port shared by the PTRS port, or a scheduled DMRS port shared by the PTRS port.

[0362] In some embodiments, the method of associating a DMRS port with a PTRS port is applicable when the above four conditions are satisfied simultaneously.

[0363] When the above conditions are met, the association relationship between the PTRS port and the DMRS port needs to be designed in combination with the number of DMRS ports associated with the PTRS port.

[0364] In view of the above situation, the association relationship between the PTRS port and the DMRS port can be the following two schemes. It should be noted that the scheme here is only for example. The present invention is mainly used to protect the PTRS-DMRS association relationship indication method when ManRank <= 4 under 8-port PUSCH transmission. The indication method here is to determine the specific meaning of the PTRS-DMRS association relationship indication field based on the number of scheduled DMRS ports shared by the PTRS port. The meaning of the PTRS-DMRS association relationship indication field here can be a specific PTRS-DMRS association relationship table. The specific form is not limited.

[0365] Specifically, Plan 1 is as follows:

[0366] 1) When the number of scheduled DMRS ports shared by the first PTRS port is greater than 2, the first indication information is used to indicate that the first PTRS port is associated with the at least one first DMRS port according to the first PTRS-DMRS association relationship. The first PTRS-DMRS association relationship can be represented by Table 14. The PTRS-DMRS association relationship in Table 14 is for the first PTRS port. For example, the PTRS-DMRS association relationship in Table 14 is for PTRS port 0.

[0367] Table 14 PTRS-DMRS association relationship for uplink PTRS port 0

[0368] Optionally, when the number of scheduling DMRS ports shared by the first PTRS port is greater than 2, if a second PTRS port exists, the second PTRS port is associated with the only scheduling DMRS port shared with the second PTRS port. For example, when the number of scheduling DMRS ports shared by PTRS port 0 is greater than 2, if PTRS port 1 exists, PTRS port 1 is associated with the only scheduling DMRS port shared with PTRS port 1.

[0369] It should be noted that the above-mentioned 'the second PTRS port exists' may also be 'sending the second PTRS port' or 'including the second PTRS port', etc., which is not limited here.

[0370] The above-mentioned 'second PTRS port is associated with a unique scheduling DMRS port shared with the second PTRS port' can also be understood as the TPMI contained in the precoding indication and rank indication information, and the DMRS port shared by the second PTRS port obtained is unique or there is only one; it can also be understood that the DMRS port indicated in the antenna port domain has only one DMRS port shared by the second PTRS, and this sharing relationship can be determined by the mapping relationship from the second PTRS port to the PUSCH port; this is not limited here.

[0371] The network device sends DCI to the terminal, where the DCI is used to indicate that the first PTRS port is associated with at least one first DMRS port, or the DCI is used to indicate an association relationship between the first PTRS port and at least one first DMRS port.

[0372] The first DMRS port may include one or more of a first scheduled DMRS port, a second scheduled DMRS port, a third scheduled DMRS port, and a fourth scheduled DMRS port. The first DMRS port may also include a DMRS port that is uniquely shared with the first PTRS port. The scheduled DMRS port shared by the first PTRS port includes the first DMRS port.

[0373] Specifically, the PTRS-DMRS association field in the DCI is used to indicate the association between the PTRS port and the DMRS port. For example, when the network device configures the terminal with a current PTRS port number of 2, the PTRS-DMRS association field in the DCI can be 2 bits, used to indicate any one of four values. For example, the four values ​​can be 0, 1, 2, or 3, corresponding to the values ​​in the first column of Table 14.

[0374] 2) When the number of scheduled DMRS ports shared by the second PTRS port is greater than 2, the first indication information is used to indicate that the second PTRS port is associated with the at least one second DMRS port according to the second PTRS-DMRS association relationship. The second PTRS-DMRS association relationship can be represented by Table 15. The PTRS-DMRS association relationship in Table 15 is for the second PTRS port. For example, the PTRS-DMRS association relationship in Table 15 is for PTRS port 1.

[0375] Table 15 PTRS-DMRS association relationship for uplink PTRS port 1

[0376] Optionally, when the number of scheduling DMRS ports shared by the second PTRS port is greater than 2, if a first PTRS port exists, the first PTRS port is associated with the only scheduling DMRS port shared with the first PTRS port. For example, when the number of scheduling DMRS ports shared by PTRS port 1 is greater than 2, if PTRS port 0 exists, PTRS port 0 is associated with the only scheduling DMRS port shared with PTRS port 0.

[0377] It should be noted that the above-mentioned 'the first PTRS port exists' may also be 'sending the first PTRS port' or 'including the first PTRS port', etc., which is not limited here.

[0378] The above-mentioned 'first PTRS port is associated with a unique scheduling DMRS port shared with the first PTRS port' can also be understood as the DMRS port shared by the first PTRS port obtained through the TPMI contained in the precoding indication and rank indication information is unique or there is only one; it can also be understood that the DMRS port indicated in the antenna port domain has only one DMRS port shared by the first PTRS, and this sharing relationship can be determined by the mapping relationship from the first PTRS port to the PUSCH port; this is not limited here.

[0379] The network device sends DCI to the terminal, where the DCI is used to indicate that the second PTRS port is associated with at least one second DMRS port, or the DCI is used to indicate an association relationship between the second PTRS port and at least one second DMRS port.

[0380] The second DMRS port may include one or more of a first scheduled DMRS port, a second scheduled DMRS port, a third scheduled DMRS port, and a fourth scheduled DMRS port. The second DMRS port may also include a DMRS port that is uniquely shared with the first PTRS port. The scheduled DMRS port shared by the second PTRS port includes the second DMRS port.

[0381] Specifically, the PTRS-DMRS association field in the DCI is used to indicate the association between the PTRS port and the DMRS port. For example, when the network device configures the terminal with a current PTRS port number of 2, the PTRS-DMRS association field in the DCI can be 2 bits, used to indicate any one of four values. For example, the four values ​​can be 0, 1, 2, or 3, corresponding to the values ​​in the first column of Table 15.

[0382] 3) When the number of scheduled DMRS ports shared by the first PTRS port is less than or equal to 2 and the number of DMRS ports associated with the second PTRS port is less than or equal to 2, the first indication information is used to indicate that the first PTRS port is associated with the at least one first DMRS port and the second PTRS port is associated with the at least one second DMRS port according to the third PTRS-DMRS association relationship. The third PTRS-DMRS association relationship can be represented by Table 16. The PTRS-DMRS association relationship in Table 16 is used for the first PTRS port and the second PTRS port. For example, the PTRS-DMRS association relationship in Table 16 is used for PTRS port 0 and PTRS port 1.

[0383] Table 16 PTRS-DMRS association relationship

[0384] Since the first PTRS port and the second PTRS port exist at the same time, and the association relationship between the first PTRS port and the second PTRS port and the PTRS port needs to be determined through the third PTRS-DMRS association relationship, the most significant bit MSB and the least significant bit LSB of the PTRS-DMRS association field in the DCI can be used to distinguish whether the association relationship between the first PTRS port and the DMRS port and the association relationship between the second PTRS port and the DMRS port are indicated. Exemplarily, for the above-mentioned PTRS-DMRS association relationship, the MSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 0; the LSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 1. Alternatively, the LSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 0; the MSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 1.

[0385] The network device sends DCI to the terminal, where the DCI is used to indicate that the first PTRS port is associated with at least one first DMRS port, and the second PTRS port is associated with at least one second DMRS port; or, the DCI is used to indicate the association relationship between the first PTRS port and at least one first DMRS port, and the association relationship between the second PTRS port and at least one second DMRS port.

[0386] The first DMRS port may include a first DMRS port shared by the first PTRS port and a second DMRS port shared by the first PTRS port; the second DMRS port may include the first DMRS port shared by the second PTRS port and a second DMRS port shared by the second PTRS port. The scheduling DMRS port shared by the first PTRS port includes the first DMRS port. The scheduling DMRS port shared by the second PTRS port includes the second DMRS port.

[0387] The above implementation process can also be implemented in the following scheme.

[0388] The specific plan 2 is as follows:

[0389] 1) When the number of scheduled DMRS ports shared by the first PTRS port is greater than 2, according to the first PTRS-DMRS association relationship, the first indication information is used to indicate that the first PTRS port is associated with the at least one first DMRS port; when the number of scheduled DMRS ports shared by the second PTRS port is greater than 2, according to the first PTRS-DMRS association relationship, the first indication information is used to indicate that the second PTRS port is associated with the at least one second DMRS port.

[0390] The first PTRS-DMRS association relationship can be represented by Table 14a. The PTRS-DMRS association relationship in Table 14a is used for the first or second PTRS port, where the specific indication of the first PTRS port or the second PTRS port can be determined based on the value of the number of scheduled DMRS ports shared by the PTRS ports. For example, the PTRS-DMRS association relationship in Table 14a is used for PTRS port 0 or PTRS port 1.

[0391] Table 14a PTRS-DMRS association relationship for uplink PTRS port 0 or 1

[0392] Optionally, when the number of scheduling DMRS ports shared by the first PTRS port is greater than 2, if a second PTRS port exists, the second PTRS port is associated with the only scheduling DMRS port shared with the second PTRS port. For example, when the number of scheduling DMRS ports shared by PTRS port 0 is greater than 2, if PTRS port 1 exists, PTRS port 1 is associated with the only scheduling DMRS port shared with PTRS port 1.

[0393] Optionally, when the number of scheduling DMRS ports shared by the second PTRS port is greater than 2, if a first PTRS port exists, the first PTRS port is associated with the only scheduling DMRS port shared with the first PTRS port. For example, when the number of scheduling DMRS ports shared by PTRS port 1 is greater than 2, if PTRS port 0 exists, PTRS port 0 is associated with the only scheduling DMRS port shared with PTRS port 0.

[0394] It should be noted that the above-mentioned 'the second PTRS port exists' may also be 'sending the second PTRS port' or 'including the second PTRS port', etc., which is not limited here.

[0395] The above-mentioned 'second PTRS port is associated with a unique scheduling DMRS port shared with the second PTRS port' can also be understood as the DMRS port shared by the second PTRS port obtained through the TPMI contained in the precoding indication and rank indication information is unique; it can also be understood as, in the DMRS port indicated in the antenna port indication field, there is only one DMRS port shared by the second PTRS, and this sharing relationship can be determined by the mapping relationship from the second PTRS port to the PUSCH port; this is not limited here.

[0396] It should be noted that the above-mentioned 'the first PTRS port exists' may also be 'sending the first PTRS port' or 'including the first PTRS port', etc., which is not limited here.

[0397] The above-mentioned 'first PTRS port is associated with a unique scheduling DMRS port shared with the first PTRS port' can also be understood as the DMRS port shared by the first PTRS port obtained through the TPMI contained in the precoding indication and rank indication information is unique or there is only one; it can also be understood that the DMRS port indicated in the antenna port domain has only one DMRS port shared by the first PTRS, and this sharing relationship can be determined by the mapping relationship from the first PTRS port to the PUSCH port; this is not limited here.

[0398] The network device sends a DCI to the terminal, where the DCI is used to indicate that the first PTRS port is associated with at least one first DMRS port or the second PTRS port is associated with at least one second DMRS port, or the DCI is used to indicate the association relationship between the first PTRS port and at least one first DMRS port or the association relationship between the second PTRS port and at least one second DMRS port.

[0399] The first DMRS port may include one or more of a first scheduled DMRS port, a second scheduled DMRS port, a third scheduled DMRS port, and a fourth scheduled DMRS port. The first DMRS port may also include a DMRS port that is uniquely shared with the first PTRS port. The scheduled DMRS port shared by the first PTRS port includes the first DMRS port.

[0400] The second DMRS port may include one or more of a first scheduled DMRS port, a second scheduled DMRS port, a third scheduled DMRS port, and a fourth scheduled DMRS port. The second DMRS port may also include a DMRS port that is uniquely shared with the first PTRS port. The scheduled DMRS port shared by the second PTRS port includes the second DMRS port.

[0401] Specifically, the PTRS-DMRS association field in the DCI is used to indicate the association between the PTRS port and the DMRS port. For example, when the network device configures the terminal with a current PTRS port number of 2, the PTRS-DMRS association field in the DCI can be 2 bits, used to indicate any one of four values. For example, the four values ​​can be 0, 1, 2, or 3, corresponding to the values ​​in the first column of Table 14a.

[0402] 2) When the number of scheduled DMRS ports shared by the first PTRS port is less than or equal to 2 and the number of DMRS ports associated with the second PTRS port is less than or equal to 2, the first indication information is used to indicate that the first PTRS port is associated with the at least one first DMRS port and the second PTRS port is associated with the at least one second DMRS port according to a third PTRS-DMRS association relationship. The third PTRS-DMRS association relationship can be represented by Table 16. The PTRS-DMRS association relationship in Table 16 is used for the first PTRS port and the second PTRS port. For example, the PTRS-DMRS association relationship in Table 16 is used for PTRS port 0 and PTRS port 1.

[0403] Since the first PTRS port and the second PTRS port exist at the same time, and the association relationship between the first PTRS port and the second PTRS port and the PTRS port needs to be determined through the third PTRS-DMRS association relationship, the most significant bit MSB and the least significant bit LSB of the PTRS-DMRS association field in the DCI can be used to distinguish whether the association relationship between the first PTRS port and the DMRS port and the association relationship between the second PTRS port and the DMRS port are indicated. Exemplarily, for the above-mentioned PTRS-DMRS association relationship, the MSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 0; the LSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 1. Alternatively, the LSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 0; the MSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 1.

[0404] It should be noted that, in this embodiment, the first PTRS-DMRS association relationship and the second PTRS-DMRS association relationship may be the same or different.

[0405] It should be noted that the first scheduled DMRS port in Table 14, Table 15, and Table 14a may also be referred to as the first scheduled DMRS port, or the first DMRS port indicated in the antenna port field.

[0406] In some embodiments of the present application, when the number of configured PTRS ports is 1, the SRS resource set identifier field does not exist, or the SRS resource set field exists and is equal to "00" or "01", the number of physical uplink shared channel (PUSCH) antenna ports is 8, and the maximum rank is less than or equal to 4, according to the first PTRS-DMRS association relationship, the first indication information is further used to indicate that the first PTRS port is associated with at least one DMRS port. In this case, the association relationship between the first PTRS port and the DMRS port can be obtained according to the PTRS-DMRS association relationship in Table 14.

[0407] Step S403: The terminal device sends a PTRS, and correspondingly, the network device receives the PTRS.

[0408] Specifically, the terminal device can send PTRS through the first PTRS port and / or the second PTRS port. The terminal device can send a PTRS signal at the corresponding first PTRS port based on the first DMRS port associated with the first PTRS port, and / or the terminal device can send a PTRS signal at the corresponding first PTRS port based on the second DMRS port associated with the second PTRS port. The first DMRS port and the second DMRS port here are determined according to the PTRS-DMRS association relationship in step S402; it can also be understood that the PTRS signal sent here includes the signals corresponding to the first PTRS port and the second PTRS port, and the signals of the first PTRS port and the second PTRS port are mapped to each RE according to the following formula, and the precoding matrix corresponding to the sending of the signal is determined according to W, where the precoding matrix W is the precoding matrix W corresponding to the PUSCH transmission layer associated with the PTRS, that is, the associated DMRS port.

[0409] Specifically, the terminal device can send PTRS in the resource block of PUSCH. The PUSCH PT-RS should be mapped to the resource element according to the following formula:

[0410] Where l is the time domain position corresponding to the PTRS signal; k is the frequency domain position corresponding to the PTRS signal; p is the port number; μ is the subcarrier spacing; β PT-RS is the power coefficient; r is the basis sequence.

[0411] When all of the following conditions are met:

[0412] l within the OFDM symbols allocated for PUSCH transmission;

[0413] Resource element (k, l) is not used for DM-RS;

[0414] -k' and Δ correspond to

[0415] The formula for determining the frequency domain position k corresponding to PTRS is as follows.

[0416] For PT-RS mapping, the resource blocks allocated for PUSCH transmission are numbered from 0 to the lowest scheduled resource block to the highest. The corresponding subcarriers in this resource block set are numbered in ascending order starting from the lowest frequency 0. The subcarriers to which the PT-RS should be mapped are

[0417] in,

[0418] i=0,1,2…(RB offset of PTRS)

[0419] It is the subcarrier offset corresponding to the DMRS port associated with each PTRS port in the RB where the PTRS exists.

[0420] In the above formula for determining the value of the frequency domain position k corresponding to PTRS:

[0421] n RNRI It is the value of the radio network temporary identity (RNTI) corresponding to the DMRS port scheduled by the current DCI.

[0422] N RB is the number of RBs scheduled at that time.

[0423] K PT-RS ∈{2,4} is the PTRS frequency density, in RB.

[0424] Corresponding to the time domain density L in the time-frequency resources occupied by the above PTRS port PT-RS The NR protocol defines its value range as shown in Table a below:

[0425] Table a PT-RS time domain density as a function of scheduled bandwidth

[0426] Among them, lMCS is the MCS of the current scheduling, ptrs-MCS1~4 is the MCS threshold range configured by the high layer, L PT-RS The density of the PTRS in the time domain indicates the symbol interval of the PTRS in a time slot. A value of 1 means that the PTRS is sent in each time domain OFDM symbol.

[0427] Corresponding to the frequency domain density K in the time-frequency resources occupied by the above PTRS port PT-RS The NR protocol defines its value range as shown in Table b below:

[0428] Table b PT-RS frequency domain density as a function of scheduled bandwidth

[0429] Among them, NRB is the number of RBs scheduled at that time, NRB0~1 is the RB threshold range configured by the high layer, K PT-RS The density of the PTRS in the frequency domain mentioned above indicates the RB interval at which the PTRS appears within a scheduling bandwidth. A value of 2 means that the PTRS is sent once on every two frequency domain RBs.

[0430] It should be noted that each step of the method in this embodiment can be implemented independently.

[0431] It should be noted that the above-mentioned first PTRS-DMRS association relationship, the second PTRS-DMRS association relationship and the third PTRS-DMRS association relationship can be presented in the form of Table 14, Table 15 and Table 16 respectively, or the association relationship between the PTRS port and the DMRS port can be described in words. The form of the above-mentioned Table 14, Table 15 and Table 16 is not limited to the above, and the description of the table header and the first row of the table is not limited to the above description. In some embodiments, the above-mentioned Table 14, Table 15 and Table 16 can also be split into different sub-tables, or different rows in Table 14, Table 15 and Table 16 can be combined into a new table. The form of the table is not limited in this application.

[0432] It should be noted that the association between the PTRS port and DMRS port mentioned above can be described in different ways, such as a DMRS port shared by a PTRS port, or a scheduled DMRS port shared by a PTRS port, or a DMRS port uniquely shared with a PTRS port.

[0433] The present application also provides a communication solution, which, under a specific configuration, indicates through the second indication information in the DCI that the first PTRS port is associated with at least one DMRS port, and the second PTRS port is associated with at least one DMRS port, and reuses the legacy criteria, thereby making a precise definition of the PTRS-DMRS association relationship.

[0434] The method may include the following steps:

[0435] S501. The network device sends RRC signaling, and correspondingly, the terminal receives the RRC signaling.

[0436] For this step, please refer to the relevant description of step S401 above.

[0437] S502. The network device sends DCI, and correspondingly, the terminal receives the DCI.

[0438] The DCI may include second indication information, where the second indication information is used to indicate that the first phase tracking reference signal PTRS port is associated with at least one first demodulation reference signal DMRS port, and the second PTRS port is associated with at least one second DMRS port.

[0439] Specifically, the PTRS-DMRS association field in the DCI may be used to indicate the association between the PTRS port and the DMRS port. The second indication information may be the value corresponding to the PTRS-DMRS association field or the PTRS-DMRS association domain in the DCI.

[0440] The at least one first DMRS port or the at least one second DMRS port may be indicated by an antenna port field, and the antenna port field may be sent through DCI.

[0441] As mentioned above, the number of PTRS ports can be configured through RRC signaling. For example, two PTRS ports are configured by maxNrofPorts in PTRS-UplinkConfig.

[0442] Similarly, RRC signaling can also indicate the presence or absence of the SRS resource set identifier field, if the SRS resource set field exists and the DCI indicates that the SRS resource set identifier field is equal to "00" or "01" (SRS resource set indicator field is absent or SRS resource set indicator field is present and equals"00"or"01"); RRC signaling can also indicate that the maximum rank is less than or equal to 4 (maxRank<=4).

[0443] The terminal device may report the number of ports used for PUSCH transmission, for example, by indicating 8-port PUSCH transmission (the number of PUSCH antenna ports equals to 8) through UE capability indication information. Alternatively, the network device may indicate the number of ports for PUSCH transmission to the terminal device through RRC signaling, such as 8-port PUSCH transmission.

[0444] It should be noted that the scheduling DMRS port shared by the first PTRS port corresponds to the sounding reference signal SRS resource indication field and / or precoding information and rank indication field, and the scheduling DMRS port shared by the second PTRS port corresponds to the sounding reference signal SRS resource indication field and / or precoding information and rank indication field. That is, the scheduling DMRS port shared by the first PTRS port and / or the scheduling DMRS port shared by the second PTRS port can be determined by the sounding reference signal SRS resource indication field and / or precoding information and rank indication field.

[0445] The following describes how to associate a DMRS port with a PTRS port when at least one of the following conditions is met:

[0446] 1) The maximum number of PTRS ports is 2;

[0447] 2) The SRS resource set identifier field does not exist. If the SRS resource set identifier field exists, and the DCI indicates that the SRS resource set identifier field is equal to "00" or "01";

[0448] 3) The maximum rank is less than or equal to 4;

[0449] 4) The number of PUSCH ports is 8.

[0450] When the number of configured PTRS ports is 2, the PTRS ports may include a first PTRS port and a second PTRS port, the first PTRS port may be PTRS port 0, and the second PTRS port may be PTRS port 1.

[0451] A PTRS port may be associated with at least one DMRS port, and the associated DMRS port may be understood as a scheduled DMRS port shared by the PTRS port, or a DMRS port corresponding to the PTRS port, or a DMRS port shared by the PTRS port, or a scheduled DMRS port shared by the PTRS port.

[0452] In some embodiments, the method of associating a DMRS port with a PTRS port is applicable when the above four conditions are satisfied simultaneously.

[0453] Specifically, the number of bits of the second indication information is 4, or the second indication information is 4-bit indication information. The 4 bits can accurately indicate the DMRS ports associated with the first PTRS port and the second PTRS port respectively.

[0454] Based on the fourth PTRS-DMRS association relationship and the second indication information, the DMRS ports associated with the first PTRS port and the second PTRS port, respectively, can be obtained. The fourth PTRS-DMRS association relationship can be represented by Table 17. The PTRS-DMRS association relationship in Table 17 is used for the first PTRS port and the second PTRS port. For example, the PTRS-DMRS association relationship in Table 17 is used for PTRS port 0 and PTRS port 1.

[0455] Table 17 PTRS-DMRS association relationship

[0456] Since the first PTRS port and the second PTRS port exist at the same time, and the association relationship between the first PTRS port and the second PTRS port and the PTRS port both needs to be determined through the fourth PTRS-DMRS association relationship, the two most significant bits MSB and the two least significant bits LSB of the PTRS-DMRS association field in the DCI can be used to distinguish whether the association relationship between the first PTRS port and the DMRS port and the association relationship between the second PTRS port and the DMRS port are indicated. Exemplarily, for the above-mentioned PTRS-DMRS association relationship, the MSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 0; the LSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 1. Alternatively, the LSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 0; the MSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 1.

[0457] The network device sends DCI to the terminal, where the DCI is used to indicate that the first PTRS port is associated with at least one first DMRS port, and the second PTRS port is associated with at least one second DMRS port; or, the DCI is used to indicate the association relationship between the first PTRS port and at least one first DMRS port, and the association relationship between the second PTRS port and at least one second DMRS port.

[0458] The first DMRS port may include: a first DMRS port shared with the first PTRS port, a second DMRS port shared with the first PTRS port, a third DMRS port shared with the first PTRS port, and a fourth DMRS port shared with the first PTRS port. The second DMRS port may include: a first DMRS port shared with the second PTRS port, a second DMRS port shared with the second PTRS port, a third DMRS port shared with the second PTRS port, and a fourth DMRS port shared with the second PTRS port.

[0459] Step S503: The terminal device sends a PTRS, and correspondingly, the network device receives the PTRS.

[0460] For a detailed description, please refer to step S403, which will not be repeated here.

[0461] It should be noted that each step of the method in this embodiment can be implemented independently.

[0462] It should be noted that the fourth PTRS-DMRS association relationship can be presented in the form of Table 17, or the association relationship between the PTRS port and the DMRS port can be described in words. The form of the above Table 17 is not limited to the above, and the description of the table header and the first row of the table is not limited to the above description. In some embodiments, the above Table 17 can also be split into different sub-tables, or different rows in Table 17 can be combined into a new table. The form of the table is not limited in this application.

[0463] It should be noted that the association between the PTRS port and DMRS port mentioned above can be described in different ways, such as a DMRS port shared by a PTRS port, or a scheduled DMRS port shared by a PTRS port, or a DMRS port uniquely shared with a PTRS port.

[0464] The present application provides another communication solution. Under a specific configuration, according to the PTRS-DMRS association relationship associated with the precoding information and the transmission precoding matrix index TPMI value contained in the rank domain, the first indication information in the DCI indicates that the first PTRS port is associated with at least one DMRS port, and / or the second PTRS port is associated with at least one DMRS port, thereby solving the problem of unclear definition of the PTRS-DMRS association relationship caused by the reuse of the legacy criterion in certain characteristic cases. At the same time, through this simplified indication method, the DCI overhead is saved while ensuring performance.

[0465] The method may include the following steps:

[0466] S601. The network device sends RRC signaling, and correspondingly, the terminal receives the RRC signaling.

[0467] For specific steps, please refer to the description of step S401.

[0468] S602. The network device sends DCI, and correspondingly, the terminal receives the DCI.

[0469] The DCI may include first indication information, where, based on a PTRS-DMRS association, the first indication information is used to indicate that a first phase tracking reference signal (PTRS) port is associated with at least one first demodulation reference signal (DMRS) port and / or a second PTRS port is associated with at least one second DMRS port. The PTRS-DMRS association is associated with the precoding information and the transmit precoding matrix index (TPMI) value included in the rank field.

[0470] The PTRS-DMRS association relationship may include one or more of a first PTRS-DMRS association relationship, a second PTRS-DMRS association relationship, and a third PTRS-DMRS association relationship. The first PTRS-DMRS association relationship may be a PTRS-DMRS association relationship as shown in Table 14; the second PTRS-DMRS association relationship may be a PTRS-DMRS association relationship as shown in Table 15; and the third PTRS-DMRS association relationship may be a PTRS-DMRS association relationship as shown in Table 16.

[0471] Specifically, the PTRS-DMRS association field in the DCI may be used to indicate the association relationship between the PTRS port and the DMRS port.

[0472] The at least one first DMRS port or the at least one second DMRS port may be indicated by an antenna port field, and the antenna port field may be sent through DCI.

[0473] As mentioned above, the number of PTRS ports can be configured through RRC signaling. For example, two PTRS ports are configured by maxNrofPorts in PTRS-UplinkConfig.

[0474] Similarly, RRC signaling can also indicate that the SRS resource set indicator field is absent or the SRS resource set indicator field is present and equals "00" or "01"; RRC signaling can also indicate that the maximum rank is less than or equal to 4 (maxRank<=4).

[0475] The terminal device can report the number of ports used for PUSCH transmission, for example, through the UE capability indication information, indicating 8-port PUSCH transmission (the number of PUSCH antenna ports equals to 8).

[0476] It should be noted that the scheduling DMRS port shared by the first PTRS port corresponds to the sounding reference signal SRS resource indication field and / or precoding information and rank indication field, and the scheduling DMRS port shared by the second PTRS port corresponds to the sounding reference signal SRS resource indication field and / or precoding information and rank indication field. That is, the scheduling DMRS port shared by the first PTRS port and / or the scheduling DMRS port shared by the second PTRS port can be determined by the sounding reference signal SRS resource indication field and / or precoding information and rank indication field. Alternatively, the first PTRS port is associated with the at least one first DMRS port corresponding to the sounding reference signal SRS resource identifier field and / or precoding information and rank field, or the second PTRS port is associated with the at least one second DMRS port corresponding to the SRS resource identifier field and / or precoding information and rank field.

[0477] The following describes how to associate a DMRS port with a PTRS port when at least one of the following conditions is met:

[0478] 1) The number of PTRS ports is 2;

[0479] 2) The SRS resource set identifier field does not exist or the SRS resource set field exists and is equal to "00" or "01";

[0480] 3) The maximum rank is less than or equal to 4;

[0481] 4) The number of PUSCH ports is 8.

[0482] When the number of configured PTRS ports is 2, the PTRS ports may include a first PTRS port and a second PTRS port, the first PTRS port may be PTRS 0, and the second PTRS port may be PTRS 1.

[0483] A PTRS port may be associated with at least one DMRS port, and the associated DMRS port may be understood as a scheduled DMRS port shared by the PTRS port.

[0484] In some embodiments, the method of associating a DMRS port with a PTRS port is applicable when the above four conditions are satisfied simultaneously.

[0485] When the above conditions are met, the association relationship between the PTRS port and the DMRS port needs to be designed in combination with the precoding information and the transmission precoding matrix index TPMI value contained in the rank domain.

[0486] In view of the above situation, the association relationship between the PTRS port and the DMRS port will be considered in different situations according to the codebook type (such as codebook 2, codebook 3, etc.) and the number of streams (rank). The specific association relationship is as follows:

[0487] When the codebook type is codebook 2 and rank = 4:

[0488] 1) When the TPMI is 0-1, determining that the first PTRS port is associated with the at least one first DMRS port based on a first PTRS-DMRS association relationship. The first PTRS-DMRS association relationship can be represented by Table 14. The PTRS-DMRS association relationship in Table 14 is for the first PTRS port. For example, the PTRS-DMRS association relationship in Table 14 is for PTRS port 0.

[0489] The network device sends DCI to the terminal, where the DCI is used to indicate that the first PTRS port is associated with at least one first DMRS port, or the DCI is used to indicate an association relationship between the first PTRS port and at least one first DMRS port.

[0490] The first DMRS port may include one or more of the first scheduled DMRS port, the second scheduled DMRS port, the third scheduled DMRS port and the fourth scheduled DMRS port.

[0491] Specifically, the PTRS-DMRS association field in the DCI is used to indicate the association between the PTRS port and the DMRS port. For example, when the network device configures the terminal with a current PTRS port number of 2, the PTRS-DMRS association field in the DCI can be 2 bits, used to indicate any one of four values. For example, the four values ​​can be 0, 1, 2, or 3, corresponding to the values ​​in the first column of Table 14.

[0492] 2) When the TPMI is 2-3, determining, based on the second PTRS-DMRS association relationship, that the second PTRS port is associated with the at least one second DMRS port. The second PTRS-DMRS association relationship can be represented by Table 15. The PTRS-DMRS association relationship in Table 15 is for the second PTRS port. For example, the PTRS-DMRS association relationship in Table 15 is for PTRS port 1.

[0493] The network device sends DCI to the terminal, where the DCI is used to indicate that the second PTRS port is associated with at least one second DMRS port, or the DCI is used to indicate an association relationship between the second PTRS port and at least one second DMRS port.

[0494] The second DMRS port may include one or more of the first scheduled DMRS port, the second scheduled DMRS port, the third scheduled DMRS port and the fourth scheduled DMRS port.

[0495] Specifically, the PTRS-DMRS association field in the DCI is used to indicate the association between the PTRS port and the DMRS port. For example, when the network device configures the terminal with a current PTRS port number of 2, the PTRS-DMRS association field in the DCI can be 2 bits, used to indicate any one of four values. For example, the four values ​​can be 0, 1, 2, or 3, corresponding to the values ​​in the first column of Table 15.

[0496] 3) When the TPMI is 4-67, the first PTRS port is associated with the at least one first DMRS port, and the second PTRS port is associated with the at least one second DMRS port according to a third PTRS-DMRS association relationship. The third PTRS-DMRS association relationship can be represented by Table 16. The PTRS-DMRS association relationship in Table 16 is used for the first PTRS port and the second PTRS port. For example, the PTRS-DMRS association relationship in Table 16 is used for PTRS port 0 and PTRS port 1.

[0497] Since the first PTRS port and the second PTRS port exist at the same time, and the association relationship between the first PTRS port and the second PTRS port and the PTRS port needs to be determined through the third PTRS-DMRS association relationship, the most significant bit MSB and the least significant bit LSB of the PTRS-DMRS association field in the DCI can be used to distinguish whether the association relationship between the first PTRS port and the DMRS port and the association relationship between the second PTRS port and the DMRS port are indicated. Exemplarily, for the above-mentioned PTRS-DMRS association relationship, the MSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 0; the LSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 1. Alternatively, the LSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 0; the MSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 1.

[0498] The network device sends DCI to the terminal, where the DCI is used to indicate that the first PTRS port is associated with at least one first DMRS port, and the second PTRS port is associated with at least one second DMRS port; or, the DCI is used to indicate the association relationship between the first PTRS port and at least one first DMRS port, and the association relationship between the second PTRS port and at least one second DMRS port.

[0499] The first DMRS port may include a first DMRS port shared by the first PTRS port and a second DMRS port shared by the first PTRS port; the second DMRS port may include a first DMRS port shared by the second PTRS port and a second DMRS port shared by the second PTRS port.

[0500] When the codebook type is codebook 2 and rank = 3:

[0501] 1) When the TPMI is 0-3, determining, based on a first PTRS-DMRS association relationship, that the first PTRS port is associated with the at least one first DMRS port. The first PTRS-DMRS association relationship can be represented by Table 14. The PTRS-DMRS association relationship in Table 14 is for the first PTRS port. For example, the PTRS-DMRS association relationship in Table 14 is for PTRS port 0.

[0502] The network device sends DCI to the terminal, where the DCI is used to indicate that the first PTRS port is associated with at least one first DMRS port, or the DCI is used to indicate an association relationship between the first PTRS port and at least one first DMRS port.

[0503] The first DMRS port may include one or more of the first scheduled DMRS port, the second scheduled DMRS port, the third scheduled DMRS port and the fourth scheduled DMRS port.

[0504] Specifically, the PTRS-DMRS association field in the DCI is used to indicate the association between the PTRS port and the DMRS port. For example, when the network device configures the terminal with a current PTRS port number of 2, the PTRS-DMRS association field in the DCI can be 2 bits, used to indicate any one of four values. For example, the four values ​​can be 0, 1, 2, or 3, corresponding to the values ​​in the first column of Table 14.

[0505] 2) When the TPMI is 4-7, determining, based on the second PTRS-DMRS association relationship, that the second PTRS port is associated with the at least one second DMRS port. The second PTRS-DMRS association relationship can be represented by Table 15. The PTRS-DMRS association relationship in Table 15 is for the second PTRS port. For example, the PTRS-DMRS association relationship in Table 15 is for PTRS port 1.

[0506] The network device sends DCI to the terminal, where the DCI is used to indicate that the second PTRS port is associated with at least one second DMRS port, or the DCI is used to indicate an association relationship between the second PTRS port and at least one second DMRS port.

[0507] The second DMRS port may include one or more of the first scheduled DMRS port, the second scheduled DMRS port, the third scheduled DMRS port and the fourth scheduled DMRS port.

[0508] Specifically, the PTRS-DMRS association field in the DCI is used to indicate the association between the PTRS port and the DMRS port. For example, when the network device configures the terminal with a current PTRS port number of 2, the PTRS-DMRS association field in the DCI can be 2 bits, used to indicate any one of four values. For example, the four values ​​can be 0, 1, 2, or 3, corresponding to the values ​​in the first column of Table 15.

[0509] 3) When the TPMI is 8-263, the first PTRS port is associated with the at least one first DMRS port, and the second PTRS port is associated with the at least one second DMRS port according to a third PTRS-DMRS association relationship. The third PTRS-DMRS association relationship can be represented by Table 16. The PTRS-DMRS association relationship in Table 16 is used for the first PTRS port and the second PTRS port. For example, the PTRS-DMRS association relationship in Table 16 is used for PTRS port 0 and PTRS port 1.

[0510] Since the first PTRS port and the second PTRS port exist at the same time, and the association relationship between the first PTRS port and the second PTRS port and the PTRS port needs to be determined through the third PTRS-DMRS association relationship, the most significant bit MSB and the least significant bit LSB of the PTRS-DMRS association field in the DCI can be used to distinguish whether the association relationship between the first PTRS port and the DMRS port and the association relationship between the second PTRS port and the DMRS port are indicated. Exemplarily, for the above-mentioned PTRS-DMRS association relationship, the MSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 0; the LSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 1. Alternatively, the LSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 0; the MSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 1.

[0511] The network device sends DCI to the terminal, where the DCI is used to indicate that the first PTRS port is associated with at least one first DMRS port, and the second PTRS port is associated with at least one second DMRS port; or, the DCI is used to indicate the association relationship between the first PTRS port and at least one first DMRS port, and the association relationship between the second PTRS port and at least one second DMRS port.

[0512] The first DMRS port may include a first DMRS port shared by the first PTRS port and a second DMRS port shared by the first PTRS port; the second DMRS port may include a first DMRS port shared by the second PTRS port and a second DMRS port shared by the second PTRS port.

[0513] When the codebook type is codebook 2, rank = 1 or rank = 2:

[0514] According to a third PTRS-DMRS association relationship, it is determined that the first PTRS port is associated with the at least one first DMRS port, and the second PTRS port is associated with the at least one second DMRS port. The third PTRS-DMRS association relationship can be represented by Table 16. The PTRS-DMRS association relationship in Table 16 is used for the first PTRS port and the second PTRS port. For example, the PTRS-DMRS association relationship in Table 16 is used for PTRS port 0 and PTRS port 1.

[0515] Since the first PTRS port and the second PTRS port exist at the same time, and the association relationship between the first PTRS port and the second PTRS port and the PTRS port needs to be determined through the third PTRS-DMRS association relationship, the most significant bit MSB and the least significant bit LSB of the PTRS-DMRS association field in the DCI can be used to distinguish whether the association relationship between the first PTRS port and the DMRS port and the association relationship between the second PTRS port and the DMRS port are indicated. Exemplarily, for the above-mentioned PTRS-DMRS association relationship, the MSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 0; the LSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 1. Alternatively, the LSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 0; the MSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 1.

[0516] When the codebook type is codebook 3 and rank = 4:

[0517] 1) When the TPMI is 256-259, determining that the first PTRS port is associated with the at least one first DMRS port based on the first PTRS-DMRS association relationship. The first PTRS-DMRS association relationship can be represented by Table 14. The PTRS-DMRS association relationship in Table 14 is for the first PTRS port. For example, the PTRS-DMRS association relationship in Table 14 is for PTRS port 0.

[0518] The network device sends DCI to the terminal, where the DCI is used to indicate that the first PTRS port is associated with at least one first DMRS port, or the DCI is used to indicate an association relationship between the first PTRS port and at least one first DMRS port.

[0519] The first DMRS port may include one or more of the first scheduled DMRS port, the second scheduled DMRS port, the third scheduled DMRS port and the fourth scheduled DMRS port.

[0520] Specifically, the PTRS-DMRS association field in the DCI is used to indicate the association between the PTRS port and the DMRS port. For example, when the network device configures the terminal with a current PTRS port number of 2, the PTRS-DMRS association field in the DCI can be 2 bits, used to indicate any one of four values. For example, the four values ​​can be 0, 1, 2, or 3, corresponding to the values ​​in the first column of Table 14.

[0521] 2) When the TPMI is 276-279, determining that the second PTRS port is associated with the at least one second DMRS port based on the second PTRS-DMRS association relationship. The second PTRS-DMRS association relationship can be represented by Table 15. The PTRS-DMRS association relationship in Table 15 is for the second PTRS port. For example, the PTRS-DMRS association relationship in Table 15 is for PTRS port 1.

[0522] The network device sends DCI to the terminal, where the DCI is used to indicate that the second PTRS port is associated with at least one second DMRS port, or the DCI is used to indicate an association relationship between the second PTRS port and at least one second DMRS port.

[0523] The second DMRS port may include one or more of the first scheduled DMRS port, the second scheduled DMRS port, the third scheduled DMRS port and the fourth scheduled DMRS port.

[0524] Specifically, the PTRS-DMRS association field in the DCI is used to indicate the association between the PTRS port and the DMRS port. For example, when the network device configures the terminal with a current PTRS port number of 2, the PTRS-DMRS association field in the DCI can be 2 bits, used to indicate any one of four values. For example, the four values ​​can be 0, 1, 2, or 3, corresponding to the values ​​in the first column of Table 15.

[0525] 3) When the TPMI is 0-255 or 260-275, the first PTRS port is associated with the at least one first DMRS port, and the second PTRS port is associated with the at least one second DMRS port, according to a third PTRS-DMRS association relationship. The third PTRS-DMRS association relationship can be represented by Table 16. The PTRS-DMRS association relationship in Table 16 is used for the first PTRS port and the second PTRS port. For example, the PTRS-DMRS association relationship in Table 16 is used for PTRS port 0 and PTRS port 1.

[0526] Since the first PTRS port and the second PTRS port exist at the same time, and the association relationship between the first PTRS port and the second PTRS port and the PTRS port needs to be determined through the third PTRS-DMRS association relationship, the most significant bit MSB and the least significant bit LSB of the PTRS-DMRS association field in the DCI can be used to distinguish whether the association relationship between the first PTRS port and the DMRS port and the association relationship between the second PTRS port and the DMRS port are indicated. Exemplarily, for the above-mentioned PTRS-DMRS association relationship, the MSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 0; the LSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 1. Alternatively, the LSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 0; the MSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 1.

[0527] The network device sends DCI to the terminal, where the DCI is used to indicate that the first PTRS port is associated with at least one first DMRS port, and the second PTRS port is associated with at least one second DMRS port; or, the DCI is used to indicate the association relationship between the first PTRS port and at least one first DMRS port, and the association relationship between the second PTRS port and at least one second DMRS port.

[0528] The first DMRS port may include a first DMRS port shared by the first PTRS port and a second DMRS port shared by the first PTRS port; the second DMRS port may include a first DMRS port shared by the second PTRS port and a second DMRS port shared by the second PTRS port.

[0529] When the codebook type is codebook 3 and rank = 3:

[0530] 1) When the TPMI is 0-7, determining that the first PTRS port is associated with the at least one first DMRS port based on a first PTRS-DMRS association relationship. The first PTRS-DMRS association relationship can be represented by Table 14. The PTRS-DMRS association relationship in Table 14 is for the first PTRS port. For example, the PTRS-DMRS association relationship in Table 14 is for PTRS port 0.

[0531] The network device sends DCI to the terminal, where the DCI is used to indicate that the first PTRS port is associated with at least one first DMRS port, or the DCI is used to indicate an association relationship between the first PTRS port and at least one first DMRS port.

[0532] The first DMRS port may include one or more of the first scheduled DMRS port, the second scheduled DMRS port, the third scheduled DMRS port and the fourth scheduled DMRS port.

[0533] Specifically, the PTRS-DMRS association field in the DCI is used to indicate the association between the PTRS port and the DMRS port. For example, when the network device configures the terminal with a current PTRS port number of 2, the PTRS-DMRS association field in the DCI can be 2 bits, used to indicate any one of four values. For example, the four values ​​can be 0, 1, 2, or 3, corresponding to the values ​​in the first column of Table 14.

[0534] 2) When the TPMI is 40-47, determining, based on the second PTRS-DMRS association relationship, that the second PTRS port is associated with the at least one second DMRS port. The second PTRS-DMRS association relationship can be represented by Table 15. The PTRS-DMRS association relationship in Table 15 is for the second PTRS port. For example, the PTRS-DMRS association relationship in Table 15 is for PTRS port 1.

[0535] The network device sends DCI to the terminal, where the DCI is used to indicate that the second PTRS port is associated with at least one second DMRS port, or the DCI is used to indicate an association relationship between the second PTRS port and at least one second DMRS port.

[0536] The second DMRS port may include one or more of the first scheduled DMRS port, the second scheduled DMRS port, the third scheduled DMRS port and the fourth scheduled DMRS port.

[0537] Specifically, the PTRS-DMRS association field in the DCI is used to indicate the association between the PTRS port and the DMRS port. For example, when the network device configures the terminal with a current PTRS port number of 2, the PTRS-DMRS association field in the DCI can be 2 bits, used to indicate any one of four values. For example, the four values ​​can be 0, 1, 2, or 3, corresponding to the values ​​in the first column of Table 15.

[0538] 3) When the TPMI is 8-39 or 48-304, the first PTRS port is associated with the at least one first DMRS port, and the second PTRS port is associated with the at least one second DMRS port, according to a third PTRS-DMRS association relationship. The third PTRS-DMRS association relationship can be represented by Table 16. The PTRS-DMRS association relationship in Table 16 is used for the first PTRS port and the second PTRS port. For example, the PTRS-DMRS association relationship in Table 16 is used for PTRS port 0 and PTRS port 1.

[0539] Since the first PTRS port and the second PTRS port exist at the same time, and the association relationship between the first PTRS port and the second PTRS port and the PTRS port needs to be determined through the third PTRS-DMRS association relationship, the most significant bit MSB and the least significant bit LSB of the PTRS-DMRS association field in the DCI can be used to distinguish whether the association relationship between the first PTRS port and the DMRS port and the association relationship between the second PTRS port and the DMRS port are indicated. Exemplarily, for the above-mentioned PTRS-DMRS association relationship, the MSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 0; the LSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 1. Alternatively, the LSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 0; the MSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 1.

[0540] The network device sends DCI to the terminal, where the DCI is used to indicate that the first PTRS port is associated with at least one first DMRS port, and the second PTRS port is associated with at least one second DMRS port; or, the DCI is used to indicate the association relationship between the first PTRS port and at least one first DMRS port, and the association relationship between the second PTRS port and at least one second DMRS port.

[0541] The first DMRS port may include a first DMRS port shared by the first PTRS port and a second DMRS port shared by the first PTRS port; the second DMRS port may include a first DMRS port shared by the second PTRS port and a second DMRS port shared by the second PTRS port.

[0542] When the codebook type is codebook 3, rank = 1 or rank = 2:

[0543] According to a third PTRS-DMRS association relationship, it is determined that the first PTRS port is associated with the at least one first DMRS port, and the second PTRS port is associated with the at least one second DMRS port. The third PTRS-DMRS association relationship can be represented by Table 16. The PTRS-DMRS association relationship in Table 16 is used for the first PTRS port and the second PTRS port. For example, the PTRS-DMRS association relationship in Table 16 is used for PTRS port 0 and PTRS port 1.

[0544] Since the first PTRS port and the second PTRS port exist at the same time, and the association relationship between the first PTRS port and the second PTRS port and the PTRS port needs to be determined through the third PTRS-DMRS association relationship, the most significant bit MSB and the least significant bit LSB of the PTRS-DMRS association field in the DCI can be used to distinguish whether the association relationship between the first PTRS port and the DMRS port and the association relationship between the second PTRS port and the DMRS port are indicated. Exemplarily, for the above-mentioned PTRS-DMRS association relationship, the MSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 0; the LSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 1. Alternatively, the LSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 0; the MSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 1.

[0545] When the codebook type is codebook 4 and rank = 4:

[0546] 1) When the TPMI is between 92 and 100, determining, based on a first PTRS-DMRS association relationship, that the first PTRS port is associated with the at least one first DMRS port. The first PTRS-DMRS association relationship can be represented by Table 14. The PTRS-DMRS association relationship in Table 14 is for the first PTRS port. For example, the PTRS-DMRS association relationship in Table 14 is for PTRS port 0.

[0547] The network device sends DCI to the terminal, where the DCI is used to indicate that the first PTRS port is associated with at least one first DMRS port, or the DCI is used to indicate an association relationship between the first PTRS port and at least one first DMRS port.

[0548] The first DMRS port may include one or more of the first scheduled DMRS port, the second scheduled DMRS port, the third scheduled DMRS port and the fourth scheduled DMRS port.

[0549] Specifically, the PTRS-DMRS association field in the DCI is used to indicate the association between the PTRS port and the DMRS port. For example, when the network device configures the terminal with a current PTRS port number of 2, the PTRS-DMRS association field in the DCI can be 2 bits, used to indicate any one of four values. For example, the four values ​​can be 0, 1, 2, or 3, corresponding to the values ​​in the first column of Table 14.

[0550] 2) When the TPMI is 153-161, determining that the second PTRS port is associated with the at least one second DMRS port based on the second PTRS-DMRS association relationship. The second PTRS-DMRS association relationship can be represented by Table 15. The PTRS-DMRS association relationship in Table 15 is for the second PTRS port. For example, the PTRS-DMRS association relationship in Table 15 is for PTRS port 1.

[0551] The network device sends DCI to the terminal, where the DCI is used to indicate that the second PTRS port is associated with at least one second DMRS port, or the DCI is used to indicate an association relationship between the second PTRS port and at least one second DMRS port.

[0552] The second DMRS port may include one or more of the first scheduled DMRS port, the second scheduled DMRS port, the third scheduled DMRS port and the fourth scheduled DMRS port.

[0553] Specifically, the PTRS-DMRS association field in the DCI is used to indicate the association between the PTRS port and the DMRS port. For example, when the network device configures the terminal with a current PTRS port number of 2, the PTRS-DMRS association field in the DCI can be 2 bits, used to indicate any one of four values. For example, the four values ​​can be 0, 1, 2, or 3, corresponding to the values ​​in the first column of Table 15.

[0554] 3) When the TPMI is 101-152, the first PTRS port is associated with the at least one first DMRS port, and the second PTRS port is associated with the at least one second DMRS port according to a third PTRS-DMRS association relationship. The third PTRS-DMRS association relationship can be represented by Table 16. The PTRS-DMRS association relationship in Table 16 is used for the first PTRS port and the second PTRS port. For example, the PTRS-DMRS association relationship in Table 16 is used for PTRS port 0 and PTRS port 1.

[0555] Since the first PTRS port and the second PTRS port exist at the same time, and the association relationship between the first PTRS port and the second PTRS port and the PTRS port needs to be determined through the third PTRS-DMRS association relationship, the most significant bit MSB and the least significant bit LSB of the PTRS-DMRS association field in the DCI can be used to distinguish whether the association relationship between the first PTRS port and the DMRS port and the association relationship between the second PTRS port and the DMRS port are indicated. Exemplarily, for the above-mentioned PTRS-DMRS association relationship, the MSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 0; the LSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 1. Alternatively, the LSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 0; the MSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 1.

[0556] The network device sends DCI to the terminal, where the DCI is used to indicate that the first PTRS port is associated with at least one first DMRS port, and the second PTRS port is associated with at least one second DMRS port; or, the DCI is used to indicate the association relationship between the first PTRS port and at least one first DMRS port, and the association relationship between the second PTRS port and at least one second DMRS port.

[0557] The first DMRS port may include a first DMRS port shared by the first PTRS port and a second DMRS port shared by the first PTRS port; the second DMRS port may include a first DMRS port shared by the second PTRS port and a second DMRS port shared by the second PTRS port.

[0558] When the codebook type is codebook 4 and rank = 3:

[0559] 1) When the TPMI is 35-36 or 41, determining that the first PTRS port is associated with the at least one first DMRS port based on a first PTRS-DMRS association relationship. The first PTRS-DMRS association relationship can be represented by Table 14. The PTRS-DMRS association relationship in Table 14 is for the first PTRS port. For example, the PTRS-DMRS association relationship in Table 14 is for PTRS port 0.

[0560] The network device sends DCI to the terminal, where the DCI is used to indicate that the first PTRS port is associated with at least one first DMRS port, or the DCI is used to indicate an association relationship between the first PTRS port and at least one first DMRS port.

[0561] The first DMRS port may include one or more of the first scheduled DMRS port, the second scheduled DMRS port, the third scheduled DMRS port and the fourth scheduled DMRS port.

[0562] Specifically, the PTRS-DMRS association field in the DCI is used to indicate the association between the PTRS port and the DMRS port. For example, when the network device configures the terminal with a current PTRS port number of 2, the PTRS-DMRS association field in the DCI can be 2 bits, used to indicate any one of four values. For example, the four values ​​can be 0, 1, 2, or 3, corresponding to the values ​​in the first column of Table 14.

[0563] 2) When the TPMI is 89-91, determining that the second PTRS port is associated with the at least one second DMRS port based on the second PTRS-DMRS association relationship. The second PTRS-DMRS association relationship can be represented by Table 15. The PTRS-DMRS association relationship in Table 15 is for the second PTRS port. For example, the PTRS-DMRS association relationship in Table 15 is for PTRS port 1.

[0564] The network device sends DCI to the terminal, where the DCI is used to indicate that the second PTRS port is associated with at least one second DMRS port, or the DCI is used to indicate an association relationship between the second PTRS port and at least one second DMRS port.

[0565] The second DMRS port may include one or more of the first scheduled DMRS port, the second scheduled DMRS port, the third scheduled DMRS port and the fourth scheduled DMRS port.

[0566] Specifically, the PTRS-DMRS association field in the DCI is used to indicate the association between the PTRS port and the DMRS port. For example, when the network device configures the terminal with a current PTRS port number of 2, the PTRS-DMRS association field in the DCI can be 2 bits, used to indicate any one of four values. For example, the four values ​​can be 0, 1, 2, or 3, corresponding to the values ​​in the first column of Table 15.

[0567] 3) When the TPMI is 37-40 or 42-88, the first PTRS port is associated with the at least one first DMRS port, and the second PTRS port is associated with the at least one second DMRS port, according to a third PTRS-DMRS association relationship. The third PTRS-DMRS association relationship can be represented by Table 16. The PTRS-DMRS association relationship in Table 16 is used for the first PTRS port and the second PTRS port. For example, the PTRS-DMRS association relationship in Table 16 is used for PTRS port 0 and PTRS port 1.

[0568] Since the first PTRS port and the second PTRS port exist at the same time, and the association relationship between the first PTRS port and the second PTRS port and the PTRS port needs to be determined through the third PTRS-DMRS association relationship, the most significant bit MSB and the least significant bit LSB of the PTRS-DMRS association field in the DCI can be used to distinguish whether the association relationship between the first PTRS port and the DMRS port and the association relationship between the second PTRS port and the DMRS port are indicated. Exemplarily, for the above-mentioned PTRS-DMRS association relationship, the MSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 0; the LSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 1. Alternatively, the LSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 0; the MSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 1.

[0569] The network device sends DCI to the terminal, where the DCI is used to indicate that the first PTRS port is associated with at least one first DMRS port, and the second PTRS port is associated with at least one second DMRS port; or, the DCI is used to indicate the association relationship between the first PTRS port and at least one first DMRS port, and the association relationship between the second PTRS port and at least one second DMRS port.

[0570] The first DMRS port may include a first DMRS port shared by the first PTRS port and a second DMRS port shared by the first PTRS port; the second DMRS port may include a first DMRS port shared by the second PTRS port and a second DMRS port shared by the second PTRS port.

[0571] When the codebook type is codebook 4, rank = 1 or rank = 2:

[0572] According to a third PTRS-DMRS association relationship, it is determined that the first PTRS port is associated with the at least one first DMRS port, and the second PTRS port is associated with the at least one second DMRS port. The third PTRS-DMRS association relationship can be represented by Table 16. The PTRS-DMRS association relationship in Table 16 is used for the first PTRS port and the second PTRS port. For example, the PTRS-DMRS association relationship in Table 16 is used for PTRS port 0 and PTRS port 1.

[0573] Since the first PTRS port and the second PTRS port exist at the same time, and the association relationship between the first PTRS port and the second PTRS port and the PTRS port needs to be determined through the third PTRS-DMRS association relationship, the most significant bit MSB and the least significant bit LSB of the PTRS-DMRS association field in the DCI can be used to distinguish whether the association relationship between the first PTRS port and the DMRS port and the association relationship between the second PTRS port and the DMRS port are indicated. Exemplarily, for the above-mentioned PTRS-DMRS association relationship, the MSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 0; the LSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 1. Alternatively, the LSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 0; the MSB of the PTRS-DMRS association field in the DCI is used to indicate the DMRS port associated with PTRS port 1.

[0574] The network device sends DCI to the terminal, where the DCI is used to indicate that the first PTRS port is associated with at least one first DMRS port, and the second PTRS port is associated with at least one second DMRS port; or, the DCI is used to indicate the association relationship between the first PTRS port and at least one first DMRS port, and the association relationship between the second PTRS port and at least one second DMRS port.

[0575] The first DMRS port may include a first DMRS port shared by the first PTRS port and a second DMRS port shared by the first PTRS port; the second DMRS port may include a first DMRS port shared by the second PTRS port and a second DMRS port shared by the second PTRS port.

[0576] Step S603: The terminal device sends a PTRS, and correspondingly, the network device receives the PTRS.

[0577] For a detailed description, please refer to step S403, which will not be repeated here.

[0578] It should be noted that each step of the method in this embodiment can be implemented independently.

[0579] It should be noted that the association between the PTRS port and DMRS port mentioned above can be described in different ways, such as a DMRS port shared by a PTRS port, or a scheduled DMRS port shared by a PTRS port, or a DMRS port uniquely shared with a PTRS port.

[0580] It should be noted that the value of the TPMI is not limited, and the value of the TPMI may be different for different codebooks. The above describes different PTRS-DMRS correspondences corresponding to different TPMI values.

[0581] According to a communication method provided in an embodiment of the present application, the association relationship between the PTRS port and the DMRS port can be accurately determined, and the signaling overhead can be received.

[0582] The present invention also provides a communication method, as described below.

[0583] When a terminal device performs 8-port SRS uplink transmission based on time division multiplexing on S consecutive OFDM symbols, if the terminal device is scheduled for other uplink transmissions with higher priorities (such as PUSCH / PUCCH / PRACH transmissions) on another carrier on a part of these S consecutive OFDM symbols, it will cause the SRS transmission powers on different OFDM symbols in these S consecutive OFDM symbols to be different. Exemplarily, as shown in Figure 8a, when S = 2, the terminal device simultaneously transmits another uplink signal with a higher priority on carrier 1 on the first OFDM symbol, and the terminal device can only transmit SRS with a power value P_1 on carrier 2; while on the second OFDM symbol, since there are no other uplink transmissions with higher priorities on other carriers at the same time, the terminal device can transmit SRS with a power value P_2 on carrier 2, where P_1 < P_2 ≤ P_CMAX. The priority order can be PUSCH / PUCCH / PRACH / SRS (PUSCH has the highest priority and SRS has the lowest priority). In this case, since the SRS transmission powers on different OFDM symbols in these S consecutive OFDM symbols are different, the coherence between SRS ports cannot be guaranteed, and the quality of uplink / downlink data transmission is reduced. Therefore, it is necessary to equalize the SRS transmission powers on S consecutive OFDM symbols to avoid such situations. For example, SRS can be transmitted with the lowest power P_1 on S consecutive OFDM symbols, as shown in Figure 8b.

[0584] It can be understood that, in order to implement the functions in the above embodiments, the terminal and the network device include corresponding hardware structures and / or software modules for executing each function. Those skilled in the art should easily realize that, combining the units and method steps of each example described in the embodiments disclosed in the present application, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the way of hardware or computer software driving the hardware depends on the specific application scenario and design constraint conditions of the technical solution.

[0585] Figures 9 - 12 are schematic structural diagrams of possible communication devices provided by the embodiments of the present application. These communication devices can be used to implement the functions of the terminal or the network device in the above method embodiments, and thus can also achieve the beneficial effects possessed by the above method embodiments.

[0586] As shown in Figure 9, it is a schematic structural diagram of a communication device provided by an embodiment of the present application. The communication device 1300 includes a transceiver unit 1301 and a processing unit 1302.

[0587] When the communication device 1300 is used to implement the functions of the terminal in the method embodiment shown in Figure 4, the transceiver unit 1301 is used to perform the operations of the terminal in steps S401, S402 and S403 in the embodiment shown in Figure 4, and the processing unit 1302 is used to perform step S403 in the embodiment shown in Figure 4.

[0588] When the communication device 1300 is used to implement the functions of the network device in the method embodiment shown in FIG4 , the transceiver unit 1301 is used to execute the operations of the network device in steps S401 , S402 and S403 in the embodiment shown in FIG4 .

[0589] Figure 10 shows a simplified schematic diagram of the structure of a terminal. For ease of understanding and illustration, in Figure 10, a mobile phone is used as an example of the terminal. As shown in Figure 10, the terminal includes a processor, a memory, a radio frequency circuit, an antenna, and input and output devices. The processor is mainly used to process communication protocols and communication data, as well as to control the terminal, execute software programs, process software program data, etc. The memory is mainly used to store software programs and data. The radio frequency circuit is mainly used to convert baseband signals into radio frequency signals and process radio frequency signals. The antenna is mainly used to transmit and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as a touch screen, a display screen, a keyboard, etc., are mainly used to receive data input by the user and output data to the user. For example, some types of terminals may not have input and output devices.

[0590] When sending data, the processor performs baseband processing on the data to be sent and outputs the baseband signal to the RF circuit. The RF circuit performs RF processing on the baseband signal and then transmits the RF signal to the outside in the form of electromagnetic waves through the antenna. When data is sent to the terminal, the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor. The processor converts the baseband signal into data and processes the data. For ease of explanation, only one memory and processor are shown in Figure 10. In an actual terminal product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or a storage device, etc. The memory may be set independently of the processor or integrated with the processor, and this embodiment of the application does not limit this.

[0591] In the embodiment of the present application, the antenna and radio frequency circuit with transceiver functions can be regarded as the receiving unit and sending unit of the terminal (also collectively referred to as the transceiver unit), and the processor with processing function can be regarded as the processing unit of the terminal. As shown in Figure 10, the terminal includes a transceiver unit 1401 and a processing unit 1402. The transceiver unit 1401 can also be called a receiver / transmitter (transmitter), a receiver / transmitter, a receiving / transmitting circuit, etc. The processing unit 1402 can also be called a processor, a processing board, a processing module, a processing device, etc. The transceiver unit 1401 is used to implement the functions of the transceiver unit 1301 in the embodiment shown in Figure 9; the processing unit 1402 is used to implement the functions of the processing unit 1302 in the embodiment shown in Figure 9.

[0592] Figure 11 shows a simplified schematic diagram of the structure of a network device. The network device includes a radio frequency signal transceiver and conversion part and part 1502, which in turn includes a transceiver unit 1501. The radio frequency signal transceiver and conversion part is mainly used for receiving and transmitting radio frequency signals and converting radio frequency signals into baseband signals; part 1502 is mainly used for baseband processing, controlling the network device, etc. The transceiver unit 1501 can also be called a receiver / transmitter, a receiver / transmitter, a receiving / transmitting circuit, etc. Part 1502 is usually the control center of the network device, which can usually be called a processing unit, which is used to control the network device to execute the steps performed by the network device in Figure 4 above. For details, please refer to the description of the relevant parts above.

[0593] Section 1502 may include one or more boards, each of which may include one or more processors and one or more memories. The processors are used to read and execute programs in the memories to implement baseband processing functions and control network devices. If multiple boards are present, the boards may be interconnected to increase processing power. As an optional implementation, multiple boards may share one or more processors, multiple boards may share one or more memories, or multiple boards may simultaneously share one or more processors.

[0594] As shown in Figure 12, which is a schematic diagram of the structure of another communication device provided in an embodiment of the present application, the communication device 1600 includes a processor 1601 and an interface circuit 1602. The processor 1601 and the interface circuit 1602 are coupled to each other. It is understood that the interface circuit 1602 can be a transceiver or an input / output interface. Optionally, the communication device 1600 may also include a memory 1603 for storing instructions executed by the processor 1601, or storing input data of the processor 1601 when executing instructions, or storing data generated after the processor 1601 executes instructions.

[0595] When the communication device 1600 is used to implement the method shown in FIG. 4 , the processor 1601 is used to implement the functions of the processing unit 1302 , and the interface circuit 1602 is used to implement the functions of the transceiver unit 1301 .

[0596] When the communication device is a chip used in a terminal, the chip is used to implement the functions of the terminal in the above method embodiments. The chip receives information from other modules in the terminal (such as a radio frequency module or antenna), which is sent by a network device or other device to the terminal; or the chip sends information to other modules in the terminal (such as a radio frequency module or antenna), which is sent by the terminal to a network device or other device.

[0597] When the communication device is a chip used in a network device, the chip is used to implement the functions of the network device in the above method embodiments. The chip receives information from other modules in the network device (such as a radio frequency module or antenna), and the information is sent to the network device by a terminal or other device; or the chip sends information to other modules in the network device (such as a radio frequency module or antenna), and the information is sent to the terminal or other device by the network device.

[0598] It is understood that the processor in the embodiments of the present application may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0599] According to a communication device provided in an embodiment of the present application, indication of DMRS ports with more than 4 streams is achieved.

[0600] The method steps in the embodiments of the present application can be implemented by hardware or by a processor executing software instructions. The software instructions can be composed of corresponding software modules, and the software modules can be stored in a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an erasable programmable read-only memory, an electrically erasable programmable read-only memory, a register, a hard disk, a mobile hard disk, a compact disc read-only memory (CD-ROM) or any other form of storage medium well known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and the storage medium can be located in an ASIC. In addition, the ASIC can be located in the first node. Of course, the processor and the storage medium can also be present in the terminal as discrete components.

[0601] An embodiment of the present application also provides a communication system, including the above-mentioned communication device.

[0602] An embodiment of the present application further provides a computer-readable storage medium having a computer program or instruction stored thereon. When the program or instruction is executed by a processor, the method described in the above embodiment is executed.

[0603] The embodiments of the present application also provide a computer program product, which, when executed on a computing device, enables the method described in the above embodiments to be executed.

[0604] In the above embodiments, all or part of the embodiments may be implemented using software, hardware, firmware, or any combination thereof. When implemented using software, all or part of the embodiments may be implemented in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are performed in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, a network device, a terminal, or other programmable device. The computer program or instructions may be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, the computer program or instructions may be transferred from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium, such as a floppy disk, hard disk, or magnetic tape; an optical medium, such as a digital video disk; or a semiconductor medium, such as a solid-state drive.

[0605] In the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0606] In this application, "at least one" means one or more, and "more" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. In the text description of this application, the character " / " generally indicates that the previous and next related objects are in an "or" relationship; in the formulas of this application, the character " / " indicates that the previous and next related objects are in a "division" relationship.

[0607] It is understood that the various numbers used in the embodiments of this application are merely for ease of description and are not intended to limit the scope of the embodiments of this application. The order of the sequence numbers of the above-mentioned processes does not necessarily imply a specific order of execution; the order of execution of the processes should be determined by their functions and inherent logic.

Claims

1. A communication method, characterized in that: The method comprises: Sending downlink control information DCI, where the DCI includes first indication information, where the first indication information is used to indicate that a first phase tracking reference signal PTRS port is associated with at least one first demodulation reference signal DMRS port and / or that a second PTRS port is associated with at least one second DMRS port; When the number of scheduled DMRS ports shared by the first PTRS port is greater than 2, the first indication information is used to indicate that the first PTRS port is associated with the at least one first DMRS port according to the first PTRS-DMRS association relationship; or, When the number of scheduled DMRS ports shared by the second PTRS port is greater than 2, the first indication information is used to indicate that the second PTRS port is associated with the at least one second DMRS port according to the second PTRS-DMRS association relationship; or, When the number of scheduled DMRS ports shared by the first PTRS port is less than or equal to 2 and the number of DMRS ports associated with the second PTRS port is less than or equal to 2, according to the third PTRS-DMRS association relationship, the first indication information is used to indicate that the first PTRS port is associated with the at least one first DMRS port, and the second PTRS port is associated with the at least one second DMRS port.

2. The method according to claim 1, characterized in that The scheduled DMRS port shared by the first PTRS port includes the first DMRS port; The scheduling DMRS port shared by the second PTRS port includes the second DMRS port.

3. The method according to claim 1 or 2, characterized in that: The first PTRS port is associated with the at least one first DMRS port corresponding to a sounding reference signal SRS resource identifier field and / or precoding information and rank field; or The second PTRS port is associated with the at least one second DMRS port and corresponds to an SRS resource identifier field and / or a precoding information and rank field.

4. The method according to any one of claims 1 to 3, characterized in that: The maximum number of PTRS ports configured is 2.

5. The method according to any one of claims 1 to 4, characterized in that: The SRS resource set identifier field does not exist or the SRS resource set field exists and is equal to "00" or "01".

6. The method according to any one of claims 1 to 5, characterized in that: The number of physical uplink shared channel PUSCH antenna ports is 8.

7. The method according to any one of claims 1 to 6, characterized in that: The maximum rank is less than or equal to 4.

8. The method according to any one of claims 1 to 7, characterized in that: The at least one first DMRS port or the at least one second DMRS port is indicated by an antenna port field, and the antenna port field is sent through the DCI.

9. The method according to any one of claims 1 to 8, characterized in that: When the number of scheduled DMRS ports shared by the first PTRS port is greater than 2, if the second PTRS port exists, the second PTRS port is associated with the only scheduled DMRS port shared with the second PTRS port; or, When the number of scheduled DMRS ports shared by the second PTRS port is greater than 2, if the first PTRS port exists, the first PTRS port is associated with the only scheduled DMRS port shared with the first PTRS port.

10. The method according to any one of claims 1 to 9, characterized in that: The number of bits of the first indication information is 2, the first PTRS-DMRS association relationship is used for the first PTRS port, and the first PTRS-DMRS association relationship includes: The first value of the first indication information corresponds to the first scheduled DMRS port; The second value of the first indication information corresponds to the second scheduled DMRS port; The third value of the first indication information corresponds to the third scheduled DMRS port; The fourth value of the first indication information corresponds to the fourth scheduled DMRS port.

11. The method according to any one of claims 1 to 9, characterized in that: The number of bits of the first indication information is 2, the second PTRS-DMRS association relationship is used for the second PTRS port, and the second PTRS-DMRS association relationship includes: The first value of the first indication information corresponds to the first scheduled DMRS port; The second value of the first indication information corresponds to the second scheduled DMRS port; The third value of the first indication information corresponds to the third scheduled DMRS port; The fourth value of the first indication information corresponds to the fourth scheduled DMRS port.

12. The method according to any one of claims 1 to 9, characterized in that: The number of bits of the first indication information is 2, the third PTRS-DMRS association relationship is used for the first PTRS port and the second PTRS port, and the third PTRS-DMRS association relationship includes: A first value of the most significant bit MSB of the first indication information corresponds to the first DMRS port shared by the first PTRS port; The second value of the MSB of the first indication information corresponds to the second DMRS port shared by the first PTRS port; A first value of the least significant bit LSB of the first indication information corresponds to the first DMRS port shared by the second PTRS port; The second value of the LSB of the first indication information corresponds to the second DMRS port shared by the second PTRS port.

13. The method according to any one of claims 1 to 12, characterized in that: The at least one first DMRS port includes at least one of the following: The only DMRS port shared with the first PTRS port; The first scheduled DMRS port; The second scheduled DMRS port; The third scheduled DMRS port; The fourth scheduled DMRS port; The first DMRS port shared with the first PTRS port; A second DMRS port shared with the first PTRS port; or, The at least one second DMRS port includes at least one of the following: The only DMRS port shared with the second PTRS port; The first scheduled DMRS port; The second scheduled DMRS port; The third scheduled DMRS port; The fourth scheduled DMRS port; A DMRS port shared by the first and second PTRS ports; The second DMRS port is shared by the second PTRS port.

14. The method according to any one of claims 1 or 3 or 5-8, characterized in that: When the number of configured PTRS ports is 1, according to the first PTRS-DMRS association relationship, the first indication information is further used to indicate that the first PTRS port is associated with at least one first demodulation reference signal DMRS port.

15. The method according to any one of claims 1 to 14, characterized in that The method further comprises: PTRS is received through the first PTRS port and / or the second PTRS port, and the PTRS corresponds to the following mapping relationship: Where a is the PTRS reference signal, l is the time domain position corresponding to the PTRS signal; k is the frequency domain position corresponding to the PTRS signal; p is the port number; μ is the subcarrier spacing; β PT-RS is the power coefficient; r is the basis sequence.

16. A communication method, characterized in that: The method comprises: Receive downlink control information DCI, where the DCI includes first indication information, where the first indication information is used to indicate that a first phase tracking reference signal PTRS port is associated with at least one first demodulation reference signal DMRS port and / or that a second PTRS port is associated with at least one second DMRS port; When the number of scheduled DMRS ports shared by the first PTRS port is greater than 2, the first indication information is used to indicate that the first PTRS port is associated with the at least one first DMRS port according to the first PTRS-DMRS association relationship; or, When the number of scheduled DMRS ports shared by the second PTRS port is greater than 2, the first indication information is used to indicate that the second PTRS port is associated with the at least one second DMRS port according to the second PTRS-DMRS association relationship; or, When the number of scheduled DMRS ports shared by the first PTRS port is less than or equal to 2 and the number of DMRS ports associated with the second PTRS port is less than or equal to 2, according to the third PTRS-DMRS association relationship, the first indication information is used to indicate that the first PTRS port is associated with the at least one first DMRS port, and the second PTRS port is associated with the at least one second DMRS port.

17. The method according to claim 16, characterized in that The scheduled DMRS port shared by the first PTRS port includes the first DMRS port; The scheduling DMRS port shared by the second PTRS port includes the second DMRS port.

18. The method according to claim 16 or 17, characterized in that The first PTRS port is associated with the at least one first DMRS port corresponding to a sounding reference signal SRS resource identifier field and / or precoding information and rank field; or The second PTRS port is associated with the at least one second DMRS port and corresponds to an SRS resource identifier field and / or a precoding information and rank field.

19. The method according to any one of claims 16 to 18, characterized in that: The maximum number of PTRS ports configured is 2.

20. The method according to any one of claims 16 to 19, characterized in that: The SRS resource set identifier field does not exist or the SRS resource set field exists and is equal to "00" or "01".

21. The method according to any one of claims 16 to 20, characterized in that: The number of physical uplink shared channel PUSCH antenna ports is 8.

22. The method according to any one of claims 16 to 21, characterized in that: The maximum rank is less than or equal to 4.

23. The method according to any one of claims 16 to 22, characterized in that: The at least one first DMRS port or the at least one second DMRS port is indicated by an antenna port field, and the antenna port field is sent through the DCI.

24. The method according to any one of claims 16 to 23, characterized in that: When the number of scheduled DMRS ports shared by the first PTRS port is greater than 2, if the second PTRS port exists, the second PTRS port is associated with the only scheduled DMRS port shared with the second PTRS port; or, When the number of scheduled DMRS ports shared by the second PTRS port is greater than 2, if the first PTRS port exists, the first PTRS port is associated with the only scheduled DMRS port shared with the first PTRS port.

25. The method according to any one of claims 16 to 24, characterized in that: The number of bits of the first indication information is 2, the first PTRS-DMRS association relationship is used for the first PTRS port, and the first PTRS-DMRS association relationship includes: The first value of the first indication information corresponds to the first scheduled DMRS port; The second value of the first indication information corresponds to the second scheduled DMRS port; The third value of the first indication information corresponds to the third scheduled DMRS port; The fourth value of the first indication information corresponds to the fourth scheduled DMRS port.

26. The method according to any one of claims 16 to 24, characterized in that: The number of bits of the first indication information is 2, the second PTRS-DMRS association relationship is used for the second PTRS port, and the second PTRS-DMRS association relationship includes: The first value of the first indication information corresponds to the first scheduled DMRS port; The second value of the first indication information corresponds to the second scheduled DMRS port; The third value of the first indication information corresponds to the third scheduled DMRS port; The fourth value of the first indication information corresponds to the fourth scheduled DMRS port.

27. The method according to any one of claims 16 to 24, characterized in that: The number of bits of the first indication information is 2, the third PTRS-DMRS association relationship is used for the first PTRS port and the second PTRS port, and the third PTRS-DMRS association relationship includes: A first value of the most significant bit MSB of the first indication information corresponds to the first DMRS port shared by the first PTRS port; The second value of the MSB of the first indication information corresponds to the second DMRS port shared by the first PTRS port; A first value of the least significant bit LSB of the first indication information corresponds to the first DMRS port shared by the second PTRS port; The second value of the LSB of the first indication information corresponds to the second DMRS port shared by the second PTRS port.

28. The method according to any one of claims 16 to 27, characterized in that: The at least one first DMRS port includes at least one of the following: The only DMRS port shared with the first PTRS port; The first scheduled DMRS port; The second scheduled DMRS port; The third scheduled DMRS port; The fourth scheduled DMRS port; The first DMRS port shared with the first PTRS port; A second DMRS port shared with the first PTRS port; or, The at least one second DMRS port includes at least one of the following: The only DMRS port shared with the second PTRS port; The first scheduled DMRS port; The second scheduled DMRS port; The third scheduled DMRS port; The fourth scheduled DMRS port; A DMRS port shared by the first and second PTRS ports; The second DMRS port is shared by the second PTRS port.

29. The method according to any one of claims 16 or 18 or 20-27, characterized in that: When the number of configured PTRS ports is 1, according to the first PTRS-DMRS association relationship, the first indication information is further used to indicate that the first PTRS port is associated with at least one first demodulation reference signal DMRS port.

30. The method according to any one of claims 16 to 29, characterized in that The method further comprises: The PTRS is sent through the first PTRS port and / or the second PTRS port, and the PTRS corresponds to the following mapping relationship: Where a is the PTRS reference signal, l is the time domain position corresponding to the PTRS signal; k is the frequency domain position corresponding to the PTRS signal; p is the port number; μ is the subcarrier spacing; β PT-RS is the power coefficient; r is the basis sequence.

31. A communication method, characterized in that: The method comprises: Downlink control information DCI is sent, and the DCI includes first indication information. According to the PTRS-DMRS association relationship, the first indication information is used to indicate that the first PTRS port is associated with at least one first DMRS port and / or the second PTRS port is associated with at least one second DMRS port; wherein the PTRS-DMRS association relationship is associated with the precoding information and the transmission precoding matrix index TPMI value contained in the rank domain.

32. The method according to claim 31, characterized in that The PTRS-DMRS association relationship includes one or more of a first PTRS-DMRS association relationship, a second PTRS-DMRS association relationship, and a third PTRS-DMRS association relationship.

33. The method according to claim 31 or 32, characterized in that When the codebook type is codebook 2 and rank=4, When the TPMI is 0-1, determining, according to the first PTRS-DMRS association relationship, that the first PTRS port is associated with the at least one first DMRS port; or, When the TPMI is 2-3, determining, according to the second PTRS-DMRS association relationship, that the second PTRS port is associated with the at least one second DMRS port; or, When the TPMI is 4-67, it is determined according to the third PTRS-DMRS association relationship that the first PTRS port is associated with the at least one first DMRS port, and the second PTRS port is associated with the at least one second DMRS port.

34. The method according to claim 31 or 32, characterized in that When the codebook type is codebook 2 and rank = 3, When the TPMI is 0-3, determining, according to the first PTRS-DMRS association relationship, that the first PTRS port is associated with the at least one first DMRS port; or, When the TPMI is 4-7, determining that the second PTRS port is associated with the at least one second DMRS port according to the second PTRS-DMRS association relationship; or, When the TPMI is 8-263, it is determined according to the third PTRS-DMRS association relationship that the first PTRS port is associated with the at least one first DMRS port, and the second PTRS port is associated with the at least one second DMRS port.

35. The method according to claim 31 or 32, characterized in that When the codebook type is codebook 2 and rank=1 or rank=2, it is determined according to the third PTRS-DMRS association relationship that the first PTRS port is associated with the at least one first DMRS port, and the second PTRS port is associated with the at least one second DMRS port.

36. A communication method, characterized in that: The method comprises: Receive downlink control information DCI, the DCI including first indication information, and according to a PTRS-DMRS association relationship, the first indication information is used to indicate that a first PTRS port is associated with at least one first DMRS port and / or a second PTRS port is associated with at least one second DMRS port; wherein the PTRS-DMRS association relationship is associated with the precoding information and the transmission precoding matrix index TPMI value contained in the rank domain.

37. The method according to claim 36, characterized in that The PTRS-DMRS association relationship includes one or more of a first PTRS-DMRS association relationship, a second PTRS-DMRS association relationship, and a third PTRS-DMRS association relationship.

38. The method according to claim 36 or 37, characterized in that When the codebook type is codebook 2 and rank=4, When the TPMI is 0-1, determining, according to the first PTRS-DMRS association relationship, that the first PTRS port is associated with the at least one first DMRS port; or, When the TPMI is 2-3, determining, according to the second PTRS-DMRS association relationship, that the second PTRS port is associated with the at least one second DMRS port; or, When the TPMI is 4-67, it is determined according to the third PTRS-DMRS association relationship that the first PTRS port is associated with the at least one first DMRS port, and the second PTRS port is associated with the at least one second DMRS port.

39. The method according to claim 36 or 37, characterized in that When the codebook type is codebook 2 and rank = 3, When the TPMI is 0-3, determining, according to the first PTRS-DMRS association relationship, that the first PTRS port is associated with the at least one first DMRS port; or, When the TPMI is 4-7, determining that the second PTRS port is associated with the at least one second DMRS port according to the second PTRS-DMRS association relationship; or, When the TPMI is 8-263, it is determined according to the third PTRS-DMRS association relationship that the first PTRS port is associated with the at least one first DMRS port, and the second PTRS port is associated with the at least one second DMRS port.

40. The method according to claim 36 or 37, characterized in that When the codebook type is codebook 2 and rank=1 or rank=2, it is determined according to the third PTRS-DMRS association relationship that the first PTRS port is associated with the at least one first DMRS port, and the second PTRS port is associated with the at least one second DMRS port.

41. A communication method, characterized in that: The method comprises: Downlink control information DCI is sent, and the DCI includes second indication information, wherein, according to a fourth PTRS-DMRS association relationship, the second indication information is used to indicate that a first phase tracking reference signal PTRS port is associated with at least one first demodulation reference signal DMRS port and / or a second PTRS port is associated with at least one second DMRS port.

42. The method according to claim 41, characterized in that The maximum number of PTRS ports configured is 2.

43. The method according to claim 41 or 42, characterized in that The SRS resource set identifier field does not exist or the SRS resource set field exists and is equal to "00" or "01".

44. The method according to any one of claims 41 to 43, characterized in that The number of physical uplink shared channel PUSCH antenna ports is 8.

45. The method according to any one of claims 41 to 44, characterized in that The maximum rank is less than or equal to 4.

46. ​​The method according to any one of claims 41 to 45, characterized in that The number of bits of the second indication information is 4, the fourth PTRS-DMRS association relationship is used for the first PTRS port and the second PTRS port, and the fourth PTRS-DMRS association relationship includes: A first value of the MSB of the second indication information corresponds to a first DMRS port shared by the first PTRS port; The second value of the MSB of the second indication information corresponds to the second DMRS port shared by the first PTRS port; The third value of the MSB of the second indication information corresponds to the third DMRS port shared by the first PTRS port; The fourth value of the MSB of the second indication information corresponds to the fourth DMRS port shared by the first PTRS port; A first value of the LSB of the second indication information corresponds to the first DMRS port shared by the second PTRS port; A second value of the LSB of the second indication information corresponds to a second DMRS port shared by the second PTRS port; The third value of the LSB of the second indication information corresponds to the third DMRS port shared by the second PTRS port; The fourth value of the LSB of the second indication information corresponds to the fourth DMRS port shared by the second PTRS port.

47. The method according to any one of claims 41 to 46, characterized in that The at least one first DMRS port includes at least one of the following: The first DMRS port shared with the first PTRS port; A second DMRS port shared with the first PTRS port; a third DMRS port shared with the first PTRS port; a fourth DMRS port shared with the first PTRS port; The at least one second DMRS port includes at least one of the following: A DMRS port shared by the first and second PTRS ports; The second DMRS port shared with the second PTRS port; The third DMRS port is shared with the second PTRS port; The fourth DMRS port is shared with the second PTRS port.

48. A communication method, characterized in that: The method comprises: Receive downlink control information DCI, the DCI including second indication information, wherein, according to a fourth PTRS-DMRS association relationship, the second indication information is used to indicate that a first phase tracking reference signal PTRS port is associated with at least one first demodulation reference signal DMRS port and / or that a second PTRS port is associated with at least one second DMRS port.

49. The method according to claim 48, characterized in that The maximum number of PTRS ports configured is 2.

50. The method according to claim 48 or 49, characterized in that The SRS resource set identifier field does not exist or the SRS resource set field exists and is equal to "00" or "01".

51. The method according to any one of claims 48 to 50, characterized in that The number of physical uplink shared channel PUSCH antenna ports is 8.

52. The method according to any one of claims 48 to 51, characterized in that The maximum rank is less than or equal to 4.

53. The method according to any one of claims 48 to 52, characterized in that The number of bits of the second indication information is 4, the fourth PTRS-DMRS association relationship is used for the first PTRS port and the second PTRS port, and the fourth PTRS-DMRS association relationship includes: A first value of the MSB of the second indication information corresponds to a first DMRS port shared by the first PTRS port; The second value of the MSB of the second indication information corresponds to the second DMRS port shared by the first PTRS port; The third value of the MSB of the second indication information corresponds to the third DMRS port shared by the first PTRS port; The fourth value of the MSB of the second indication information corresponds to the fourth DMRS port shared by the first PTRS port; A first value of the LSB of the second indication information corresponds to the first DMRS port shared by the second PTRS port; A second value of the LSB of the second indication information corresponds to a second DMRS port shared by the second PTRS port; The third value of the LSB of the second indication information corresponds to the third DMRS port shared by the second PTRS port; The fourth value of the LSB of the second indication information corresponds to the fourth DMRS port shared by the second PTRS port.

54. The method according to any one of claims 48 to 53, characterized in that The at least one first DMRS port includes at least one of the following: The first DMRS port shared with the first PTRS port; A second DMRS port shared with the first PTRS port; a third DMRS port shared with the first PTRS port; a fourth DMRS port shared with the first PTRS port; The at least one second DMRS port includes at least one of the following: A DMRS port shared by the first and second PTRS ports; The second DMRS port shared with the second PTRS port; The third DMRS port is shared with the second PTRS port; The fourth DMRS port is shared with the second PTRS port.

55. A communication device, characterized in that: The device comprises a processor, a memory, and instructions stored in the memory and executed on the processor, wherein when the instructions are executed, the communication device executes the method according to any one of claims 1 to 54.

56. A communication device, characterized in that: The device comprises a processor for executing a program stored in a memory, and when the program is executed, the device performs the method according to any one of claims 1 to 54.

57. The device according to claim 56, characterized in that The memory is located external to the device.

58. A computer-readable storage medium, characterized in that: The method comprises instructions, which, when executed on a computer, execute the method according to any one of claims 1 to 54.

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