Phase tracking reference signal sending method, and terminal, apparatus, system and medium

Abstract

The present disclosure relates to a phase tracking reference signal (PTRS) sending method, and a terminal, an apparatus, a system and a medium. The method comprises: a terminal receiving configuration information sent by a network device, wherein the configuration information comprises the maximum number of PTRS ports of the terminal during non-coherent transmission, and the terminal is a terminal having three transmitting antennas; the terminal receiving DCI sent by the network device, and determining on the basis of the DCI a DMRS port which is associated with a PTRS port when a PUSCH is scheduled; and the terminal sending the PTRS by means of the DMRS port which is associated with the PTRS port, wherein identical pre-coding is applied to the PTRS port and the DMRS port. In the present disclosure, a terminal supporting 3Tx can obtain configuration information issued by a network device, so as to learn the maximum number of PTRS ports. On this basis, the terminal can determine a DMRS port associated with a PTRS port, and send a PTRS by means of the associated DMRS port. Therefore, for a 3Tx terminal, PTRSs can be effectively transmitted, thereby improving the accuracy of estimating, at a network side, phase noise of the 3Tx terminal.

Description

Phase tracking reference signal transmission method, terminal, device, system and medium Technical Field

[0001] The present disclosure relates to the field of communication technologies, and in particular to a method, terminal, device, system, and medium for sending a phase tracking reference signal. Background Art

[0002] In communications, phase noise (PN) can cause common phase error (CPE), a particularly pronounced effect at high frequencies. Terminals can send a Phase Tracking Reference Signal (PTRS) to allow network equipment to estimate phase noise.

[0003] Summary of the Invention

[0004] It is necessary to solve the problem of how high-transmission-capability terminals, such as terminals supporting three transmit antennas (3Tx), send PTRS.

[0005] The embodiments of the present disclosure provide a method, terminal, device, system, and medium for transmitting a Phase Tracking Reference Signal (PTRS).

[0006] In a first aspect, an embodiment of the present disclosure provides a PTRS sending method, including:

[0007] The terminal receives configuration information sent by the network device, including the maximum number of PTRS ports of the terminal in non-coherent transmission (NC). The terminal is a terminal with three transmitting antennas.

[0008] The terminal receives downlink control information (DCI) sent by the network device and determines the demodulation reference signal (DMRS) port associated with the PTRS port when the physical uplink shared channel (PUSCH) is scheduled based on the DCI;

[0009] The terminal sends the PTRS according to the DMRS port associated with the PTRS port, wherein the PTRS port and the DMRS port use the same precoding.

[0010] In a second aspect, an embodiment of the present disclosure provides a PTRS sending method, the method comprising:

[0011] The network device sends configuration information to the terminal. The configuration information includes the maximum number of PTRS ports of the terminal in incoherent transmission. The terminal is a terminal with three transmitting antennas.

[0012] The network device sends DCI to the terminal. The DCI is used to determine the DMRS port associated with the PTRS port when the PUSCH is scheduled. The DMRS port associated with the PTRS port is used by the terminal to send PTRS. The PTRS port and the DMRS port use the same precoding.

[0013] In a third aspect, an embodiment of the present disclosure provides a terminal, including:

[0014] A transceiver module is configured to receive configuration information sent by a network device, the configuration information including the maximum number of PTRS ports for a terminal in incoherent transmission, where the terminal has three transmitting antennas;

[0015] The transceiver module is also used to receive downlink control information DCI sent by the network device;

[0016] A processing module, configured to determine, according to the DCI, a demodulation reference signal (DMRS) port associated with the PTRS port when the physical uplink shared channel (PUSCH) is scheduled;

[0017] The transceiver module is further configured to send the PTRS according to the DMRS port associated with the PTRS port, wherein the PTRS port and the DMRS port use the same precoding.

[0018] In a fourth aspect, an embodiment of the present disclosure provides a network device, including:

[0019] A transceiver module is used to send configuration information to the terminal, where the configuration information includes the maximum number of PTRS ports of the terminal in non-coherent transmission. The terminal is a terminal with three transmitting antennas;

[0020] The transceiver module is further used to send DCI to the terminal. The DCI is used to determine the DMRS port associated with the PTRS port when PUSCH is scheduled. The DMRS port associated with the PTRS port is used by the terminal to send PTRS. The PTRS port and the DMRS port use the same precoding.

[0021] In a fifth aspect, an embodiment of the present disclosure provides a communication device, including:

[0022] one or more processors;

[0023] The communication device is used to execute the method of the first aspect or the method of the second aspect.

[0024] In a sixth aspect, an embodiment of the present disclosure provides a communication system, including a terminal and a network device, wherein:

[0025] The terminal is configured to implement the method of the first aspect;

[0026] The network device is configured to implement the method of the second aspect.

[0027] In a seventh aspect, an embodiment of the present disclosure provides a storage medium storing instructions, wherein:

[0028] When the instructions are executed on the communication device, the communication device is caused to execute the method of the first aspect or the second aspect.

[0029] In the disclosed embodiments, a terminal supporting 3Tx can obtain configuration information from a network device and learn the maximum number of PTRS ports. Based on this information, the terminal can determine the DMRS port associated with the PTRS port and send PTRS through the associated DMRS port. This allows the 3Tx terminal to effectively transmit PTRS, improving the accuracy of the network-side estimation of the 3Tx terminal's phase noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following drawings required for describing the embodiments are introduced. The following drawings are merely some embodiments of the present disclosure and do not impose specific limitations on the protection scope of the present disclosure.

[0031] FIG1a is an exemplary schematic diagram of the architecture of a communication system provided according to an embodiment of the present disclosure;

[0032] FIG1b to FIG1e are schematic structural diagrams showing a DMRS according to an exemplary embodiment;

[0033] FIG2a is an exemplary interaction diagram of a method provided according to an embodiment of the present disclosure;

[0034] Figures 2b to 2e are schematic diagrams of terminal radio frequency architectures provided according to embodiments of the present disclosure;

[0035] 2f to 2j are schematic diagrams of repeated transmission according to an embodiment of the present disclosure;

[0036] FIG3 is an exemplary flowchart of a method provided according to an embodiment of the present disclosure;

[0037] FIG4 is an exemplary flowchart of a method provided according to an embodiment of the present disclosure;

[0038] FIG5a is a schematic structural diagram of a terminal according to an embodiment of the present disclosure;

[0039] FIG5b is a schematic structural diagram of a network device according to an embodiment of the present disclosure;

[0040] FIG6a is a schematic diagram of a communication device according to an embodiment of the present disclosure;

[0041] FIG6 b is a schematic diagram of a communication device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0042] The embodiments of the present disclosure provide a method, terminal, device, system, and medium for transmitting a Phase Tracking Reference Signal (PTRS).

[0043] In a first aspect, an embodiment of the present disclosure provides a PTRS sending method, including:

[0044] The terminal receives configuration information sent by the network device, where the configuration information includes a maximum number of ports for a phase tracking reference signal (PTRS) of the terminal in incoherent transmission, and the terminal is a terminal with three transmit antennas.

[0045] The terminal receives downlink control information DCI sent by the network device, and determines, according to the DCI, a demodulation reference signal DMRS port associated with the PTRS port when the physical uplink shared channel PUSCH is scheduled;

[0046] The terminal sends the PTRS according to the DMRS port associated with the PTRS port, wherein the PTRS port and the DMRS port use the same precoding.

[0047] In the above embodiment, a terminal supporting 3Tx can obtain configuration information from a network device and learn the maximum number of PTRS ports. Based on this information, the terminal can determine the DMRS port associated with the PTRS port and send PTRS through the associated DMRS port. This allows the 3Tx terminal to effectively transmit PTRS, improving the accuracy of the network-side estimation of the 3Tx terminal's phase noise.

[0048] In combination with the embodiments of the first aspect, in some embodiments, the DMRS port associated with the PTRS port belongs to a DMRS port group associated with the PTRS port, wherein the DMRS port group includes at least one DMRS port, and the at least one DMRS port satisfies a set order.

[0049] In the above embodiment, the terminal may determine the associated DMRS port in the DMRS port group associated with the PTRS port, and thus may determine a suitable DMRS port to send the PTRS.

[0050] In combination with the embodiments of the first aspect, in some embodiments, the grouping method of the DMRS port grouping is the same as the grouping method of the sounding reference signal (SRS) port grouping or the PUSCH port grouping.

[0051] In the above embodiment, the DMRS port group is associated with the SRS port group or the PUSCH port group, so that the DMRS port associated with the PTRS port can be determined by the SRS port group or the PUSCH port group, thereby improving the flexibility of determining the associated DMRS port in non-coherent transmission.

[0052] In combination with the embodiments of the first aspect, in some embodiments, the grouping mode is predefined by the protocol or configured by the network device.

[0053] In the above embodiment, the terminal may learn the grouping mode of DMRS port grouping, SRS port grouping or PUSCH port grouping based on protocol definition or network configuration, so as to determine the DMRS port associated with the PTRS port in a single group.

[0054] In conjunction with the embodiments of the first aspect, in some embodiments, the method further includes:

[0055] The terminal determines the actual number of PTRS ports based on a Transmission Precoding Matrix Indicator (TPMI) and an SRS port group, or the terminal determines the actual number of PTRS ports based on a TPMI and a PUSCH port group; or

[0056] The actual number of PTRS ports is predefined or defaulted; or,

[0057] The actual number of PTRS ports is determined by the configuration information;

[0058] Among them, TPMI is carried in DCI.

[0059] In the above embodiment, the terminal may determine the actual number of PTRS ports based on various methods, thereby determining the DMRS ports associated with the actual number of PTRS ports, so as to effectively send PTRS.

[0060] In conjunction with the embodiments of the first aspect, in some embodiments,

[0061] When the transmission layer number (Rank) of the PUSCH is greater than 1 and the maximum number of ports is 2, the actual number of PTRS ports is determined by the number of SRS port groups or the number of PUSCH port groups actually corresponding to different TPMI data layers.

[0062] In combination with the embodiment of the first aspect, in some embodiments, all data layers of the TPMI are transmitted through one SRS port group or one PUSCH port group, and the actual number of PTRS ports is 1; or,

[0063] All data layers of TPMI are transmitted through 2 SRS port groups or PUSCH port groups, and the actual number of PTRS ports is 2.

[0064] In the above embodiment, the manner in which the terminal determines the actual number of PTRS ports according to the TPMI is illustrated, so that the terminal can effectively determine the actual number when receiving the TPMI, so as to accurately send the PTRS.

[0065] In conjunction with the embodiments of the first aspect, in some embodiments, when the number of transmission layers of the PUSCH indicated in the DCI is 1, the terminal determines that the actual number of PTRS ports is 1, and the PTRS port is associated with one allocated DMRS port;

[0066] The maximum number of PTRS ports is 1 or 2, and the DCI includes an information indication field with a bit width of 0, and the information indication field is used to indicate the association relationship between the PTRS port and the DMRS port.

[0067] In the above embodiment, when the bit width of the information indication field is 0, the terminal can determine the DMRS port associated with the actual PTRS port based on the number of transmission layers, and save the bit overhead of DCI.

[0068] In combination with the embodiments of the first aspect, in some embodiments, when the number of transmission layers of PUSCH indicated in the DCI is greater than 1, the terminal determines the DMRS port associated with the PTRS port based on the code point of the information indication field in the DCI, wherein the information indication field is used to indicate the association relationship between the PTRS port and the DMRS port.

[0069] In the above embodiment, when the information indication field occupies a certain number of bits, the terminal may determine the corresponding associated DMRS port based on the code point of the information indication field, thereby enabling PTRS transmission.

[0070] In conjunction with the embodiments of the first aspect, in some embodiments, the bit width corresponding to the information indication field is a set value; or,

[0071] The bit width corresponding to the information indication field is different when the number of transmission layers is different;

[0072] The maximum number of PTRS ports is 1, and the actual number of PTRS ports is 1.

[0073] In the above embodiment, the information indication field may occupy a fixed width, or vary with the number of transmission layers, so as to flexibly indicate the associated DMRS ports in different scenarios.

[0074] In combination with the embodiments of the first aspect, in some embodiments, the setting value is 2, and the DMRS port corresponding to the PTRS port when the number of transmission layers is greater than 1 is indicated through a 2-bit code point in the information indication field.

[0075] In the above embodiment, the information indication field may occupy a fixed 2 bits, which can save bit overhead and effectively indicate the associated DMRS port.

[0076] In combination with the embodiment of the first aspect, in some embodiments, when the number of transmission layers of the PUSCH is 2, the bit width of the information indication field is 1, and the DMRS port corresponding to the PTRS port is indicated by a 1-bit code point in the information indication field; or,

[0077] When the number of transmission layers of the PUSCH is 3, the bit width of the information indication field is 2, and the DMRS port corresponding to the PTRS port is indicated by the 2-bit code point in the information indication field.

[0078] In the above embodiment, the bit width of the information indication field varies with the number of transmission layers, so that the information indication field can effectively indicate the associated DMRS port in the case of different numbers of transmission layers.

[0079] In combination with the embodiments of the first aspect, in some embodiments, when the actual number of PTRS ports is 1, the code points of the information indication field have a mapping relationship with the DMRS ports.

[0080] In the above embodiment, the terminal can conveniently determine the DMRS ports indicated by different code points based on the mapping relationship, thereby improving the efficiency of determining the association between the PTRS port and the DMRS port.

[0081] In combination with the embodiments of the first aspect, in some embodiments, the actual number of PTRS ports is 2, and the information indication field is used to indicate the DMRS port associated with any PTRS port in the corresponding DMRS port group; wherein, the maximum number of PTRS ports is 2, and the number of transmission layers of PUSCH is 2.

[0082] In the above embodiment, for two actual PTRS ports, the information indication field may indicate the DMRS port associated with one of the PTRS ports, and implicitly determine the DMRS port associated with the other PTRS port.

[0083] In combination with the embodiments of the first aspect, in some embodiments, the bit width of the information indication field is 1, and a 1-bit code point in the information indication field indicates a DMRS port associated with a predefined PTRS port in a corresponding DMRS port group.

[0084] In the above embodiment, the information indication field may occupy 1 bit, saving bit overhead while effectively indicating the associated DMRS port.

[0085] In combination with the embodiments of the first aspect, in some embodiments, the bit width of the information indication field is 2, and a DMRS port associated with a predefined PTRS port is indicated through a 2-bit code point in the information indication field.

[0086] In combination with the embodiments of the first aspect, in some embodiments, when the actual number of PTRS ports is 2, the code points of the information indication field have a mapping relationship with the DMRS ports.

[0087] In the above embodiment, the terminal determines the associated DMRS port based on the mapping relationship, which is conducive to improving mapping efficiency.

[0088] In combination with the embodiments of the first aspect, in some embodiments, the actual number of PTRS ports is 1, and the information indication field is used to indicate a DMRS port associated with a PTRS port; wherein, the maximum number of PTRS ports is 2, and the number of transmission layers of PUSCH is 2.

[0089] In the above embodiment, when the actual number is 1, only the DMRS port associated with the actual PTRS port may be indicated through the information indication field.

[0090] In combination with the embodiments of the first aspect, in some embodiments, the bit width of the information indication field is 1 or 2, and the DMRS port associated with the PTRS port is indicated through different code points of the information indication field.

[0091] In the above embodiment, on the basis of effectively indicating the associated DMRS port, the flexibility of the information indication field indication can be improved.

[0092] In combination with the embodiment of the first aspect, in some embodiments, the actual number of PTRS ports is 2, the information indication field is used to indicate the SRS port group or PUSCH port group associated with any PTRS port, and the DMRS port in the corresponding DMRS port group is determined based on the SRS port group or the PUSCH port group; or,

[0093] The information indication field is used to indicate the DMRS port associated with each PTRS port in the corresponding DMRS port group; or,

[0094] The information indication field includes a first part and a second part, the first part is used to indicate the DMRS port associated with a PTRS port in the corresponding DMRS port group, and the second part is used to indicate the DMRS port associated with another PTRS port in the corresponding DMRS port group, and the number of bits in the first part and the second part are different;

[0095] The maximum number of ports for PTRS is 2, and the maximum number of transmission layers for PUSCH is 3.

[0096] In the above embodiment, when the number of transmission layers is 3, the terminal may determine the DMRS ports associated with the two actual PTRS ports based on different methods, so that the PTRSs can be sent separately.

[0097] In combination with the embodiments of the first aspect, in some embodiments, the bit width of the information indication field is 1 or 2, and different code points of the information indication field are used to indicate the port in the SRS port group or the port in the PUSCH group associated with the first PTRS port or the second PTRS port.

[0098] In the above embodiment, the information indication field can flexibly indicate the port associated with any PTRS port based on different numbers of bits, thereby determining the associated DMRS port.

[0099] In combination with the embodiments of the first aspect, in some embodiments, the bit width of the information indication field is 4, and the high 2 bits of the information indication field indicate the DMRS port associated with the first PTRS port, and the low 2 bits indicate the DMRS port associated with the second PTRS port.

[0100] In the above embodiment, the DMRS ports associated with different PTRS ports are indicated based on the most significant bit (MSB) and the least significant bit (LSB) of the information indication field.

[0101] In conjunction with the embodiments of the first aspect, in some embodiments, the bit width of the information indication field is 3, the first part includes the high-order 2 bits of the information indication field, and the second part includes the low-order 1 bit of the information indication field;

[0102] The DMRS port associated with the first PTRS port is indicated by different code points in the first part, and the DMRS port associated with the second PTRS port among the remaining DMRS ports is indicated by different code points in the second part.

[0103] In the above embodiment, the terminal can adaptively determine the DMRS port associated with the corresponding PTRS port based on the code points in different parts of the information indication field.

[0104] In combination with the embodiments of the first aspect, in some embodiments, the PTRS port is associated with a set DMRS port, and the set DMRS port is predefined by the protocol or configured by the network device through signaling; wherein, the DCI does not include an information indication field for indicating the association relationship between the PTRS port and the DMRS port.

[0105] In the above embodiment, the DMRS port associated with the PTRS port can be determined by protocol definition or default, thereby saving DCI bit overhead.

[0106] In conjunction with the embodiments of the first aspect, in some embodiments, the DMRS port is set to be the first allocated DMRS port in the DMRS port group associated with the PTRS port;

[0107] The number of transmission layers indicated by the DCI is greater than 1, and the maximum number of PTRS ports is 1, or the maximum number of PTRS ports is 2 and the actual number of PTRS ports is 1.

[0108] In conjunction with the embodiment of the first aspect, in some embodiments, the actual number of PTRS ports is 2, the set DMRS port associated with one PTRS port is the first allocated DMRS port in the corresponding DMRS port group, and the set DMRS port associated with another PTRS port is the second allocated DMRS port in the corresponding DMRS port group;

[0109] The number of transmission layers indicated by DCI is 2, and the maximum number of ports of PTRS is 2.

[0110] In the above embodiment, different PTRS ports may be associated with different DMRS ports, and the terminal may respectively determine the associated DMRS ports in the corresponding DMRS port group.

[0111] In conjunction with the embodiment of the first aspect, in some embodiments, the actual number of PTRS ports is 2, and the set DMRS ports associated with the two PTRS ports are both: the first DMRS port in the DMRS port group corresponding to the SRS port group or the PUSCH port group;

[0112] The number of transmission layers indicated by DCI is 3, and the maximum number of ports of PTRS is 2.

[0113] In the above embodiment, different PTRS ports may have the same associated DMRS ports.

[0114] In a second aspect, an embodiment of the present disclosure provides a PTRS sending method, the method comprising:

[0115] The network device sends configuration information to the terminal. The configuration information includes the maximum number of PTRS ports of the terminal in incoherent transmission. The terminal is a terminal with three transmitting antennas.

[0116] The network device sends DCI to the terminal. The DCI is used to determine the DMRS port associated with the PTRS port when the PUSCH is scheduled. The DMRS port associated with the PTRS port is used by the terminal to send PTRS. The PTRS port and the DMRS port use the same precoding.

[0117] In combination with the embodiments of the second aspect, in some embodiments, the DMRS port associated with the PTRS port belongs to a DMRS port group associated with the PTRS port, wherein the DMRS port group includes at least one DMRS port, and the at least one DMRS port satisfies a set order.

[0118] In combination with the embodiments of the second aspect, in some embodiments, the grouping method of the DMRS port grouping is the same as the grouping method of the SRS port grouping or the PUSCH port grouping.

[0119] In combination with the embodiments of the second aspect, in some embodiments, the grouping mode is predefined by the protocol or configured by the network device.

[0120] In conjunction with the embodiments of the second aspect, in some embodiments, the actual number of PTRS ports is determined based on the TPMI and SRS port groupings; or,

[0121] The actual number of PTRS ports is determined based on the TPMI and PUSCH port grouping; or,

[0122] The actual number of PTRS ports is predefined or defaulted; or,

[0123] The actual number of PTRS ports is determined by the configuration information;

[0124] Among them, TPMI is carried in DCI.

[0125] In combination with the embodiments of the second aspect, in some embodiments, when the number of transmission layers of PUSCH is greater than 1 and the maximum number of ports is 2, the actual number of PTRS ports is determined by the number of SRS port groups or the number of PUSCH port groups actually corresponding to different TPMI data layers.

[0126] In conjunction with the embodiment of the second aspect, in some embodiments, all data layers of the TPMI are transmitted through one SRS port group or one PUSCH port group, and the actual number of PTRS ports is one; or,

[0127] All data layers of TPMI are transmitted through 2 SRS port groups or PUSCH port groups, and the actual number of PTRS ports is 2.

[0128] In conjunction with the embodiment of the second aspect, in some embodiments, when the number of transmission layers of the PUSCH indicated in the DCI is 1, the actual number of PTRS ports is 1, and the PTRS port is associated with one allocated DMRS port;

[0129] The maximum number of PTRS ports is 1 or 2, and the DCI includes an information indication field with a bit width of 0, and the information indication field is used to indicate the association relationship between the PTRS port and the DMRS port.

[0130] In combination with the embodiments of the second aspect, in some embodiments, when the number of transmission layers of PUSCH indicated in the DCI is greater than 1, the code point of the information indication field in the DCI is used to determine the DMRS port associated with the PTRS port, wherein the information indication field is used to indicate the association relationship between the PTRS port and the DMRS port.

[0131] In conjunction with the embodiments of the second aspect, in some embodiments, the bit width corresponding to the information indication field is a set value; or,

[0132] The bit width corresponding to the information indication field is different when the number of transmission layers is different;

[0133] The maximum number of PTRS ports is 1, and the actual number of PTRS ports is 1.

[0134] In combination with the embodiments of the second aspect, in some embodiments, the setting value is 2, and the DMRS port corresponding to the PTRS port when the number of transmission layers is greater than 1 is indicated by a 2-bit code point in the information indication field.

[0135] In combination with the embodiment of the second aspect, in some embodiments, when the number of transmission layers of the PUSCH is 2, the bit width of the information indication field is 1, and the DMRS port corresponding to the PTRS port is indicated by a 1-bit code point in the information indication field; or,

[0136] When the number of transmission layers of the PUSCH is 3, the bit width of the information indication field is 2, and the DMRS port corresponding to the PTRS port is indicated by the 2-bit code point in the information indication field.

[0137] In combination with the embodiments of the second aspect, in some embodiments, when the actual number of PTRS ports is 1, the code points of the information indication field have a mapping relationship with the DMRS ports.

[0138] In combination with the embodiments of the second aspect, in some embodiments, the actual number of PTRS ports is 2, and the information indication field is used to indicate the DMRS port associated with any PTRS port in the corresponding DMRS port group; wherein, the maximum number of PTRS ports is 2, and the number of transmission layers of PUSCH is 2.

[0139] In combination with the embodiments of the second aspect, in some embodiments, the bit width of the information indication field is 1, and the DMRS port associated with a predefined PTRS port in the corresponding DMRS port group is indicated by different code points of 1 bit in the information indication field.

[0140] In combination with the embodiments of the second aspect, in some embodiments, the bit width of the information indication field is 2, and the DMRS port associated with a predefined PTRS port is indicated by different code points of 2 bits in the information indication field.

[0141] In combination with the embodiments of the second aspect, in some embodiments, when the actual number of PTRS ports is 2, the code points of the information indication field have a mapping relationship with the DMRS ports.

[0142] In combination with the embodiments of the second aspect, in some embodiments, the actual number of PTRS ports is 1, and the information indication field is used to indicate the DMRS port associated with a PTRS port; wherein, the maximum number of PTRS ports is 2, and the number of transmission layers of PUSCH is 2.

[0143] In combination with the embodiments of the second aspect, in some embodiments, the bit width of the information indication field is 1 or 2, and the DMRS port associated with the PTRS port is indicated through different code points of the information indication field.

[0144] In conjunction with the embodiment of the second aspect, in some embodiments, the actual number of PTRS ports is 2, the information indication field is used to indicate the SRS port group or PUSCH port group associated with any PTRS port, and the DMRS port in the corresponding DMRS port group is determined based on the SRS port group or the PUSCH port group; or,

[0145] The information indication field is used to indicate the DMRS port associated with each PTRS port in the corresponding DMRS port group; or,

[0146] The information indication field includes a first part and a second part, the first part is used to indicate the DMRS port associated with a PTRS port in the corresponding DMRS port group, and the second part is used to indicate the DMRS port associated with another PTRS port in the corresponding DMRS port group, and the number of bits in the first part and the second part are different;

[0147] The maximum number of ports for PTRS is 2, and the maximum number of transmission layers for PUSCH is 3.

[0148] In combination with the embodiments of the second aspect, in some embodiments, the bit width of the information indication field is 1 or 2, and different code points of the information indication field are used to indicate the port in the SRS port group or the port in the PUSCH group associated with the first PTRS port or the second PTRS port.

[0149] In combination with the embodiments of the second aspect, in some embodiments, the bit width of the information indication field is 4, and the high 2 bits of the information indication field indicate the DMRS port associated with the first PTRS port, and the low 2 bits indicate the DMRS port associated with the second PTRS port.

[0150] In conjunction with the embodiments of the second aspect, in some embodiments, the bit width of the information indication field is 3, the first part includes the high-order 2 bits of the information indication field, and the second part includes the low-order 1 bit of the information indication field;

[0151] The DMRS port associated with the first PTRS port is indicated by different code points in the first part, and the DMRS port associated with the second PTRS port among the remaining DMRS ports is indicated by different code points in the second part.

[0152] In combination with the embodiments of the second aspect, in some embodiments, the PTRS port is associated with a set DMRS port, and the set DMRS port is predefined by the protocol or configured by the network device through signaling; wherein, the DCI does not include an information indication field for indicating the association relationship between the PTRS port and the DMRS port.

[0153] In conjunction with the embodiments of the second aspect, in some embodiments, the DMRS port is set to be the first allocated DMRS port in the DMRS port group associated with the PTRS port;

[0154] The number of transmission layers indicated by the DCI is greater than 1, and the maximum number of PTRS ports is 1, or the maximum number of PTRS ports is 2 and the actual number of PTRS ports is 1.

[0155] In conjunction with the embodiment of the second aspect, in some embodiments, the actual number of PTRS ports is 2, the set DMRS port associated with one PTRS port is the first allocated DMRS port in the corresponding DMRS port group, and the set DMRS port associated with another PTRS port is the second allocated DMRS port in the corresponding DMRS port group;

[0156] The number of transmission layers indicated by DCI is 2, and the maximum number of ports of PTRS is 2.

[0157] In conjunction with the embodiment of the second aspect, in some embodiments, the actual number of PTRS ports is 2, and the set DMRS ports associated with the two PTRS ports are both: the first DMRS port in the DMRS port group corresponding to the SRS port group or the PUSCH port group;

[0158] The number of transmission layers indicated by DCI is 3, and the maximum number of ports of PTRS is 2.

[0159] In a third aspect, an embodiment of the present disclosure provides a terminal, including:

[0160] A transceiver module is configured to receive configuration information sent by a network device, the configuration information including the maximum number of PTRS ports for a terminal in incoherent transmission, where the terminal has three transmitting antennas;

[0161] The transceiver module is also used to receive downlink control information DCI sent by the network device;

[0162] A processing module, configured to determine, according to the DCI, a demodulation reference signal (DMRS) port associated with the PTRS port when the physical uplink shared channel (PUSCH) is scheduled;

[0163] The transceiver module is further configured to send the PTRS according to the DMRS port associated with the PTRS port, wherein the PTRS port and the DMRS port use the same precoding.

[0164] In a fourth aspect, an embodiment of the present disclosure provides a network device, including:

[0165] A transceiver module is used to send configuration information to the terminal, where the configuration information includes the maximum number of PTRS ports of the terminal in non-coherent transmission. The terminal is a terminal with three transmitting antennas;

[0166] The transceiver module is further used to send DCI to the terminal. The DCI is used to determine the DMRS port associated with the PTRS port when PUSCH is scheduled. The DMRS port associated with the PTRS port is used by the terminal to send PTRS. The PTRS port and the DMRS port use the same precoding.

[0167] In a fifth aspect, an embodiment of the present disclosure provides a communication device, including:

[0168] one or more processors;

[0169] The communication device is used to execute the method of the first aspect or the method of the second aspect.

[0170] In a sixth aspect, an embodiment of the present disclosure provides a communication system, including a terminal and a network device, wherein:

[0171] The terminal is configured to implement the method of the first aspect;

[0172] The network device is configured to implement the method of the second aspect.

[0173] In a seventh aspect, an embodiment of the present disclosure provides a storage medium storing instructions, wherein:

[0174] When the instructions are executed on the communication device, the communication device is caused to execute the method of the first aspect or the second aspect.

[0175] In an eighth aspect, an embodiment of the present disclosure proposes a program product. When the program product is executed by a communication device, the communication device executes the method described in the optional implementation of the first and second aspects.

[0176] In a ninth aspect, an embodiment of the present disclosure proposes a computer program, which, when executed on a computer, enables the computer to execute the method described in the optional implementation of the first and second aspects.

[0177] In a tenth aspect, an embodiment of the present disclosure provides a chip or a chip system, which includes a processing circuit configured to execute the method described in the optional implementation of the first and second aspects above.

[0178] It is understandable that the above-mentioned terminals, network devices, communication systems, storage media, program products, computer programs, chips, or chip systems are all used to perform the methods proposed in the embodiments of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects of the corresponding methods and will not be repeated here.

[0179] The embodiments of the present disclosure are not exhaustive and are merely illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined. For example, some or all steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0180] In each embodiment of the present disclosure, unless otherwise specified or provided for by logic, the terms and / or descriptions between the embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form a new embodiment based on their inherent logical relationships.

[0181] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0182] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular, such as "a", "an", "the", "above", "said", "the", "the", etc., may mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun following the article may be understood as a singular expression or a plural expression.

[0183] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0184] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. may be used interchangeably.

[0185] In some embodiments, descriptions such as "at least one of A and B," "A and / or B," "A in one case, B in another case," or "in response to one case A, in response to another case B" may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); and in some embodiments, A and B (both A and B are executed). The above is also applicable when there are more branches such as A, B, and C.

[0186] In some embodiments, "A or B" and other descriptions may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). The above is also applicable when there are more branches such as A, B, C, etc.

[0187] The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects and do not constitute any restriction on the position, order, priority, quantity or content of the description objects. For the statement of the description object, please refer to the description in the context of the claims or embodiments, and no unnecessary restriction should be constituted due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields". "First" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by the ordinal number and can be one or more. Taking "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes can be the same or different. For example, if the description object is "device", then the "first device" and the "second device" can be the same device or different devices, and their types can be the same or different; for another example, if the description object is "information", then the "first information" and the "second information" can be the same information or different information, and their contents can be the same or different.

[0188] In some embodiments, “including A,” “comprising A,” “used to indicate A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0189] In some embodiments, terms such as "in response to...", "in response to determining...", "in the case of...", "at the time of...", "when...", "if...", "if...", etc. can be used interchangeably.

[0190] In some embodiments, terms such as "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not less than", and "above" can be replaced with each other, and terms such as "less than", "less than or equal to", "not greater than", "less than", "less than or equal to", "not more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

[0191] In some embodiments, devices and equipment can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. In some cases, they can also be understood as "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", "subject", etc.

[0192] In some embodiments, "network" can be interpreted as devices included in the network, such as access network equipment, core network equipment, etc.

[0193] In some embodiments, "access network device (AN device)" may also be referred to as "radio access network device (RAN device)", "base station (BS)", "radio base station", "fixed station", and in some embodiments may also be understood as "node", "access point", "transmission point (TP)", "reception point (RP)", "transmission and / or reception point (TRP)" "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femto cell", "pico cell", "sector", "cell group", "serving cell", "carrier", "component carrier", "bandwidth part (BWP)", etc.

[0194] In some embodiments, "terminal" or "terminal device" may be referred to as "user equipment (UE)", "user terminal" "mobile station (MS)", "mobile terminal (MT)", subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, etc.

[0195] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0196] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0197] In addition, each element, each row, or each column in the table of the embodiment of the present disclosure can be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns can also be implemented as an independent embodiment.

[0198] FIG1a is a schematic diagram showing the architecture of a communication system according to an embodiment of the present disclosure.

[0199] As shown in FIG. 1 a , a communication system 100 includes a terminal 101 and a network device 102 .

[0200] In some embodiments, the terminal 101 includes, for example, a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, and at least one of a wireless terminal device in a smart home, but is not limited thereto.

[0201] In some embodiments, when the network device 102 is a network device, the network device may include at least one of an access network device and a core network device.

[0202] In some embodiments, the access network device is, for example, a node or device that accesses a terminal to a wireless network. The access network device may include an evolved NodeB (eNB), a next generation evolved NodeB (ng-eNB), a next generation NodeB (gNB), a node B (NB), a home node B (HNB), a home evolved nodeB (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an open base station (Open RAN), a cloud base station (Cloud RAN), a base station in other communication systems, and at least one of an access node in a wireless fidelity (WiFi) system, but is not limited thereto.

[0203] In some embodiments, the technical solution of the present disclosure can be applied to the Open RAN architecture. In this case, the interfaces between or within the access network devices involved in the embodiments of the present disclosure can be transformed into internal interfaces of the Open RAN, and the processes and information interactions between these internal interfaces can be implemented through software or programs.

[0204] In some embodiments, the access network device can be composed of a centralized unit (CU) and a distributed unit (DU), where the CU can also be called a control unit. The CU-DU structure can be used to split the protocol layer of the access network device, with the functions of some protocol layers centrally controlled by the CU, and the functions of the remaining part or all of the protocol layers distributed in the DU, which is centrally controlled by the CU, but is not limited to this.

[0205] In some embodiments, the core network device can be a device including one or more network elements, or it can be multiple devices or device groups, each including all or part of one or more network elements. The network element can be virtual or physical. The core network includes, for example, at least one of the Evolved Packet Core (EPC), the 5G Core Network (5GCN), and the Next Generation Core (NGC). Alternatively, the core network device refers to a network element with a specific function, such as the Access Management Function (AMF), the Service Management Function (SMF), etc.

[0206] It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution provided by the embodiment of the present disclosure. Ordinary technicians in this field can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution provided by the embodiment of the present disclosure is also applicable to similar technical problems.

[0207] The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG. 1 a , or a partial body thereof, but are not limited thereto.

[0208] The entities shown in Figure 1a are examples. The communication system may include all or part of the entities in Figure 1a, or may include other entities outside Figure 1a. The number and form of the entities are arbitrary. The connection relationship between the entities is an example. The entities may be connected or disconnected, and the connection may be in any manner, which may be direct or indirect, and may be wired or wireless.

[0209] The embodiments of the present disclosure can be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G new radio (NR), future radio access (FRA), new radio access technology (RAT), new radio (NR), new radio access (NX), future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), Public Land Mobile Network (PLMN) networks, Device-to-Device (D2D) systems, Machine-to-Machine (M2M) systems, Internet of Things (IoT) systems, Vehicle-to-Everything (V2X), systems utilizing other communication processing methods, and next-generation systems based on and extending these. Furthermore, multiple systems may be combined (for example, a combination of LTE or LTE-A with 5G).

[0210] In order to improve coverage at the cell edge and provide a more balanced quality of service within the service area, multi-transmission point (TRP) collaboration, or simply multi-point collaboration, remains an important technical means in the NR system. From the perspective of network morphology, network deployment with a large number of distributed access points and centralized baseband processing will be more conducive to providing a balanced user experience rate and significantly reduce the latency and signaling overhead caused by handover. As the frequency band increases, relatively dense access point deployment is also required to ensure network coverage. In high-frequency bands, as the integration of active antenna equipment increases, modular active antenna arrays will be more likely to be used.

[0211] In some embodiments, the antenna array of each TRP can be divided into several relatively independent antenna panels, so the shape and number of ports of the entire array can be flexibly adjusted according to the deployment scenario and business needs. The antenna panels or TRPs can also be connected by optical fiber for more flexible distributed deployment. In the millimeter wave band, as the wavelength decreases, the blocking effect caused by obstacles such as human bodies or vehicles will be more significant. In this case, from the perspective of ensuring the robustness of the link connection, it is also possible to utilize the collaboration between multiple TRPs or panels to transmit or receive from multiple beams at multiple angles, thereby reducing the adverse effects of the blocking effect.

[0212] In some embodiments, based on the mapping relationship between the transmitted signal streams to multiple TRPs or panels, multi-point coordinated transmission technology can be divided into coherent transmission and incoherent transmission. In coherent transmission, each data layer is mapped to multiple TRPs or panels through a weighted vector. In incoherent transmission, each data stream is only mapped to some TRPs or panels. Coherent transmission has higher requirements for synchronization between transmission points and the transmission capacity of the backhaul link, and is therefore more sensitive to many non-ideal factors in real-world deployment conditions. Relatively speaking, incoherent transmission is less affected by the above factors.

[0213] In some embodiments, simultaneous transmission enhancement based on multiple TRPs (MTRPs) of a multi-panel terminal is considered for PUSCH or Physical Uplink Control Channel (PUCCH).

[0214] For PUSCH or Physical Downlink Shared Channel (PDSCH), the data layer of data transmission corresponds to DMRS. The DMRS design of data channels (such as PDSCH or PUSCH) in NR systems mainly includes the following two types:

[0215] Front-load DMRS: Within each scheduling time unit, the first DMRS appearance should be as close as possible to the scheduling start point. The use of front-load DMRS helps the receiver quickly estimate the channel and perform reception detection, which is important for reducing latency and supporting self-contained architectures. Depending on the total number of orthogonal DMRS ports, front-load DMRS can occupy up to two consecutive orthogonal frequency division multiplexing (OFDM) symbols.

[0216] Additional DMRS: For low-mobility scenarios, front-load DMRS can achieve channel estimation performance that meets demodulation requirements with low overhead. However, the mobile speed considered by the NR system can reach up to 500 km / h. Faced with such a large dynamic range of mobility, in addition to front-load DMRS, in medium-speed or high-speed scenarios, more DMRS symbols need to be inserted within the scheduling duration to meet the estimation accuracy of the time-varying channel. To address this problem, the NR system adopts a DMRS structure that combines front-load DMRS with additional DMRS with configurable time-domain density. Each set of additional DMRS patterns is a repetition of the front-load DMRS.

[0217] In some embodiments, if additional DMRS is present within each scheduling time unit, the pattern of each additional DMRS group is consistent with the front-load DMRS. Therefore, the front-load DMRS pattern design is the basis for DMRS design. Front-load DMRS design is divided into two configuration types: Configuration type 1 (type 1) uses a comb (COMB) + orthogonal cover code (OCC) structure, and configuration type 2 (type 2) is based on a frequency division multiplexing (FDM) + OCC structure.

[0218] In some embodiments, the front-load DMRS patterns of the two configuration types can be seen in Figures 1b to 1e. Figure 1b shows a schematic diagram of the DMRS pattern mapping for one OFDM symbol corresponding to configuration type 1, and Figure 1c shows a schematic diagram of the DMRS pattern mapping for two OFDM symbols corresponding to configuration type 1. Figure 1d shows a schematic diagram of the DMRS pattern mapping for one OFDM symbol corresponding to configuration type 2, and Figure 1e shows a schematic diagram of the DMRS pattern mapping for two OFDM symbols corresponding to configuration type 2. In the figures, t represents the time domain, and f represents the frequency domain.

[0219] Depending on the number of orthogonal ports used for transmission, front-load DMRS can be configured with up to two OFDM symbols. Considering power efficiency, when using two front-load DMRS symbols, Time Domain Orthogonal Cover Codes (TD-OCC) are employed in the time domain, in addition to frequency-domain Circuit Switching (CS) or OCC.

[0220] In some embodiments, similar to front-load DMRS, each additional DMRS group can occupy up to two consecutive DMRS symbols. Depending on the specific use case, up to three additional DMRS groups can be configured in each schedule. The number of additional DMRS groups depends on higher-layer parameter configuration and the specific schedule duration.

[0221] In some embodiments, Tables 1-1 to 1-16 illustrate the DMRS port allocation for different parameter configurations under the cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) waveform. Taking Table 1-1 as an example, Table 1-1 corresponds to DMRS type 1 (dmrs-Type = 1), single symbol (maxLength = 1), and single stream transmission (rank = 1), and determines the mapping relationship of the DMRS port. The meaning of the parameters in the following Tables 1-2 to 1-16 can be referred to Table 1-1 and will not be repeated here.

[0222] Table 1-1 Antenna port(s), transform precoder disabled, dmrs-Type = 1, maxLength = 1, rank = 1

[0223] Among them, CDM stands for Code Division Multiplexing.

[0224] Table 1-2 Antenna ports, conversion precoding disabled, dmrs-Type = 1, maxLength = 1, rank = 2

[0225] Table 1-3 Antenna ports, conversion precoding disabled, dmrs-Type = 1, maxLength = 1, rank = 3

[0226] Table 1-4 Antenna port, conversion precoding disabled, dmrs-Type = 1, maxLength = 1, rank = 4

[0227] Table 1-5 Antenna port, conversion precoding disabled, dmrs-Type = 1, maxLength = 2, rank = 1

[0228] Table 1-6 Antenna port, conversion precoding disabled, dmrs-Type = 1, maxLength = 2, rank = 2

[0229] Table 1-7 Antenna port, conversion precoding disabled, dmrs-Type = 1, maxLength = 2, rank = 3

[0230] Table 1-8 Antenna port, conversion precoding disabled, dmrs-Type = 1, maxLength = 2, rank = 4

[0231] Table 1-9 Antenna port, conversion precoding disabled, dmrs-Type = 2, maxLength = 1, rank = 1

[0232] Table 1-10 Antenna port, conversion precoding disabled, dmrs-Type = 2, maxLength = 1, rank = 2

[0233] Table 1-11 Antenna ports, conversion precoding disabled, dmrs-Type = 2, maxLength = 1, rank = 3

[0234] Table 1-12 Antenna ports, conversion precoding disabled, dmrs-Type = 2, maxLength = 1, rank = 4

[0235] Table 1-13 Antenna port, conversion precoding disabled, dmrs-Type = 2, maxLength = 2, rank = 1

[0236] Table 1-14 Antenna port, conversion precoding disabled, dmrs-Type = 2, maxLength = 2, rank = 2

[0237] Table 1-15 Antenna port, conversion precoding disabled, dmrs-Type = 2, maxLength = 2, rank = 3

[0238] Table 1-16 Antenna port, conversion precoding disabled, dmrs-Type = 2, maxLength = 2, rank = 4

[0239] In some embodiments of the present disclosure, PN is caused by the destruction of the orthogonality of each subcarrier in the OFDM system by the execution of the local oscillator (LO). This causes CPE, which rotates the modulation constellation at a fixed angle and causes inter-carrier interference (ICI), resulting in scattering of constellation points. This situation is more obvious at high frequencies. Due to the greater impact of CPE, compensation for CPE is mainly considered in NR. PTRS is used to estimate CPE.

[0240] The NR system supports 1-port, 2-port, 4-port and 8-port PUSCH. The terminal of the related technology is equipped with only 1 or 2 Tx antennas and supports partial and non-coherent transmission (PC) and NC.

[0241] In some embodiments, enhanced UL performance requires a terminal with higher transmission capabilities, such as the terminal 101 equipped with three Tx antennas in the disclosed embodiment. For enhanced terminals 101 with higher transmission capabilities, the maximum supported data layers are three, necessitating enhanced PTRS transmission. Terminals 101 with three Tx antennas utilize NC transmission, requiring consideration of the DMRS port grouping method used in PC transmission. This requires reconsidering the PTRS transmission method and the PTRS association indicator field in the DCI.

[0242] The embodiment of the present disclosure provides a method for determining an associated DMRS port and sending a PTRS.

[0243] FIG2a is an interactive diagram illustrating a method for transmitting a phase tracking reference signal (PTRS) according to an embodiment of the present disclosure. As shown in FIG2a , an embodiment of the present disclosure relates to a method for transmitting a PTRS, the method comprising:

[0244] In step S2101 , the network device 102 sends configuration information to the terminal 101 .

[0245] In some embodiments, the configuration information includes the maximum number of PTRS ports of the terminal 101 in the non-coherent transmission NC, or the maximum number of ports is referred to as the maximum PTRS port number. For example, the maximum number of ports can be configured as 1 or 2.

[0246] It is worth noting that the term "port" in the embodiments of the present disclosure can also be referred to as "antenna port". For example, a PTRS port can also be referred to as a PTRS antenna port, and a DMRS port can also be referred to as a DMRS antenna port. For simplicity of description, the embodiments of the present disclosure use "port".

[0247] Optionally, the network device 102 may send the configuration information via a Radio Resource Control (RRC) message.

[0248] In one example, the configuration information may include PTRS configuration (PTRS-UplinkConfig), see the following PTRS configuration information element (IE), the maximum number of ports can be obtained by configuring maxNrofPorts in the high-level parameter PTRS-UplinkConfig to 'n1' or 'n2', where 'n1' corresponds to the maximum number of ports being configured as 1, and 'n2' corresponds to the maximum number of ports being configured as 2.

[0249] In some embodiments, PTRS is used to track the phase noise introduced by the local oscillator (LO) in the gNB and UE for CPE estimation. PTRS can be configured by the network to terminal 101 as a UE-specific reference signal to enhance signal coverage and quality.

[0250] Optionally, the number of PTRS ports is related to the number of phase noise sources. When there are multiple independent phase noise sources, each phase noise source requires a PTRS port for phase estimation.

[0251] Optionally, PTRS can be regarded as an extension of DMRS and associated with DMRS; for example, the two use the same precoding, have port association, orthogonal sequence generation, or Quasi Co-Location (QCL) relationship, etc.

[0252] Optionally, the network device 102 may control whether the terminal 101 transmits PTRS in the uplink by configuring high-layer parameters.

[0253] In an example, the configuration information may include DMRS configuration (DMRS-UplinkConfig), see the following DMRS configuration IE. If phaseTrackingRS is not configured in the high-level parameter DMRS-UplinkConfig, the terminal 101 does not transmit PTRS in uplink.

[0254] In some embodiments, terminal 101 receives the above configuration information.

[0255] In some embodiments, the terminal 101 in the disclosed embodiments is a terminal with three transmit antennas or a 3Tx terminal. This type of terminal 101 has an enhanced transmit channel, and the receive antenna (Rx) configuration can be 4 receive antennas (Rx), 6Rx, or 8Rx. For example, Figure 2b shows the terminal RF architecture for 3Tx and 4Rx (3T4R); Figure 2c shows the terminal RF architecture for 3Tx and 6Rx (3T6R); and Figures 2d to 2e show the terminal RF architecture for 3Tx and 8Rx (3T8R).

[0256] Step S2102 , the network device 102 sends DCI to the terminal 101 .

[0257] In some embodiments, DCI may include various PTRS-related indication information.

[0258] Optionally, the DCI may be DCI0_1 or DCI0_2.

[0259] In one example, the DCI includes an information indication field, which is used to indicate the association relationship between the PTRS port and the DMRS port. Therefore, the information indication field may also be referred to as a PTRS-DMRS association indication field.

[0260] Optionally, for each PTRS port, its associated DMRS port group may be determined, and its associated DMRS port may be further determined in the associated DMRS port group.

[0261] Optionally, the DMRS port associated with the PTRS port belongs to a DMRS port group associated with the PTRS port, wherein the DMRS port group includes at least one DMRS port, and the at least one DMRS port satisfies a set order.

[0262] The set order can be ascending or descending, wherein the index of different DMRS ports in the DMRS port group is the order index, not the actual index of the DMRS port. For example, for the DMRS port group {0, 1}, 0 represents the first DMRS port in the group, and 1 represents the second DMRS port in the group.

[0263] Optionally, the grouping method of the DMRS port group is the same as the grouping method of the SRS port group or the PUSCH port group. The name of the DMRS port group can also be replaced by DMRS port group, which is a name for reference only and is used to indicate a group of DMRS ports; the name of the SRS port group can also be replaced by SRS port group, which is a name for reference only and is used to indicate a group of SRS ports; the name of the PUSCH port group can also be replaced by PUSCH port group, which is a name for reference only and is used to indicate a group of PUSCH ports.

[0264] The SRS port grouping or PUSCH port grouping may include the following methods:

[0265] Same as the conventional method, for example, for three ports 0, 1 and 2, ports {0, 2} are a group and {1} is a group; or,

[0266] Use other grouping methods, such as {0, 1} in one group and {2} in another group; or {0} in one group and {1, 2} in another group;

[0267] Alternatively, the grouping mode may be predefined by a protocol or configured by a network device.

[0268] There is an association or correspondence between the DMRS port group and the SRS port group or the PUSCH port group, and the DMRS port group corresponding to the SRS port group or the PUSCH port group can be determined.

[0269] In another example, the DCI may include the TPMI to indicate the precoding matrix.

[0270] In another example, the DCI may include a transmission rank or a transmission rank indication (TRI; or Rank Indication, RI) to indicate the number of data layers or the number of layers transmitted by the PUSCH.

[0271] In some embodiments, terminal 101 receives the DCI to obtain various information indicated in the DCI.

[0272] In step S2103 , the terminal 101 determines the actual number of PTRS ports.

[0273] Optionally, the actual number of PTRS ports is less than or equal to the maximum number of ports configured in the above configuration information.

[0274] Optionally, before sending the PTRS, the terminal 101 needs to determine the actual number so as to send the PTRS according to the DMRS port associated with the actual PTRS port.

[0275] In some embodiments, the terminal 101 may determine the actual number by the following different examples or methods:

[0276] In one example, the terminal 101 determines the actual number of PTRS ports according to the TPMI and the SRS port grouping or the PUSCH port grouping.

[0277] Optionally, the TPMI is carried in the DCI.

[0278] For PC and NC uplink transmissions in the codebook-based uplink PUSCH transmission mode, if the Sounding Reference Signal Resource Indicator (SRI) selects or RRC configures an SRS resource, and the different SRS ports in the SRS resource come from panels using different crystal oscillators, two PTRS ports are required. When SRI selects only one SRS resource, if the maximum number of PTRS ports is 1, then one PTRS port is used to transmit the corresponding SRS resource. When the maximum number of PTRS ports configured is 2, the actual number of PTRS ports needs to be determined in conjunction with the TPMI.

[0279] The rows in the TPMI matrix correspond to the number of ports, and the columns correspond to the data layers. The number of data layers or the number of layers can be indicated by the number of transmission layers (rank) or by including a transmission layer indication (TRI; or Rank Indication, RI). Taking the SRS port grouping as an example, SRS ports 0, 1, and 2 are divided into two groups, {0,1} and {2}, respectively. The SRS port group {0,1} shares PTRS port 0, and the SRS port group {2} shares PTRS port 1. The first row of the TPMI matrix corresponds to SRS port 0, the second row corresponds to SRS port 1, and the third row corresponds to SRS port 2. It should be noted that PUSCH transmission uses the same SRS port, so the SRS port here can also be equivalent to the PUSCH port.

[0280] If the data layer is indicated as layer 1 by TPMI from an SRS port group, only one PTRS port needs to be scheduled.

[0281] In an optional example, when rank=1, the TPMI corresponds to a matrix with 3 rows and 1 column. The matrix form can refer to any of the following: In the three matrix forms with Rank=1, the data layer actually transmitted is 1, and one PTRS port needs to be scheduled, that is, the actual number of PTRS ports is 1.

[0282] Optionally, when the number of PUSCH transmission layers is greater than 1 and the maximum number of ports is 2, the terminal determines the actual number of PTRS ports by the number of SRS port groups or PUSCH port groups actually corresponding to different TPMI data layers.

[0283] In combination with the description of the foregoing embodiment, the number of transmission layers (rank) can be indicated by DCI, and the rank value can indicate the number of data layers or the number of layers. Rank>1 can be, for example: rank=2 or 3. Optionally, when the number of transmission layers of PUSCH is greater than 1 and the maximum number of ports is 2, the number of SRS port groups or PUSCH port groups actually corresponding to different data layers of TPMI is different, and the actual number of PTRS ports determined by the terminal 101 is different. For example, if all data layers of TPMI are transmitted through 1 SRS port group or PUSCH port group, the actual number of PTRS ports is 1. For another example, if all data layers of TPMI are transmitted through 2 SRS port groups or PUSCH port groups, the actual number of PTRS ports is 2. The above-mentioned SRS port group or PUSCH port group can also be replaced by a DMRS port group.

[0284] In an optional example, when rank = 2, the TPMI corresponds to a matrix with 3 rows and 2 columns. The matrix form can refer to any of the following: Among the three matrix forms of Rank=2, Corresponding to SRS port 0 and SRS port 1, one SRS port group is involved, so the actual number of PTRS ports is 1; Corresponding to SRS port 1 and SRS port 2, Corresponding to SRS port 0 and SRS port 2, and Both involve 2 SRS port groups, so the actual number of PTRS ports is 2.

[0285] In another optional example, when rank=3, TPMI corresponds to a matrix with 3 rows and 3 columns, such as The first row corresponds to SRS port 0, the second row corresponds to SRS port 1, and the third row corresponds to SRS port 2, involving 2 SRS port groups. That is, the 3 data layers of TPMI are transmitted through 2 SRS port groups, so the actual number of PTRS is 2.

[0286] In another example, the actual number of PTRS ports is predefined or defaulted; or, the actual number of PTRS ports is determined according to configuration information.

[0287] In this example, the terminal 101 may define or fix the actual number of PTRS ports, or fix the actual number of PTRS ports according to the maximum number of ports in the configuration information.

[0288] In step S2104, the terminal 101 determines, according to the DCI, the DMRS port to which the PTRS port is associated when the PUSCH is scheduled.

[0289] Optionally, in combination with the description of the foregoing embodiments, a PTRS port is associated with a group of DMRS port groups, which may contain one or more DMRS ports; the terminal needs to determine the DMRS port in the DMRS port group that is specifically associated with the PTRS port. For the sake of simplicity, the limitation of the DMRS port group is omitted in the description of some embodiments.

[0290] In some embodiments, the actual PTRS port is used for actual transmission, so the DMRS port associated with the actual PTRS port needs to be determined. The actual number of PTRS ports may be the same as or different from the configured maximum number of ports. Optionally, terminal 101 can determine the DMRS port associated with the actual PTRS port in different ways.

[0291] In the example of the first aspect, when the number of transmission layers of PUSCH indicated in the DCI is 1, the terminal determines that the actual number of PTRS ports is 1, and the PTRS port is associated with an assigned DMRS port; wherein the maximum number of ports is 1 or 2, and the DCI includes an information indication field with a bit width of 0, and the information indication field is used to indicate the association relationship between the PTRS port and the DMRS port.

[0292] Optionally, the allocated DMRS port may be determined based on the DMRS port group it belongs to, such as determining a DMRS port in the DMRS port group according to TPMI, network configuration, or a default method. The TPMI method may refer to the description of the above embodiment.

[0293] Optionally, when rank=1, the data layer of the TPMI is transmitted through one DMRS port, and the DMRS port can be regarded as a DMRS port allocated for transmission.

[0294] Optionally, if the maximum number of ports is 1, the actual number of PTRS ports of the terminal 101 may be determined to be 1. If rank=1, it may be determined that an actual PTRS port is associated with an allocated DMRS port.

[0295] Optionally, if the maximum number of ports is 2 and rank=1, the terminal 101 may still determine that the actual number is 1, and the actual one PTRS port is associated with an allocated one DMRS port.

[0296] In this example, the bit width of the information indication field may be 0, or the indication field is not required, so as to save the bit overhead of the DCI.

[0297] In the example of the second aspect, when the number of transmission layers of PUSCH indicated in the DCI is greater than 1, the terminal determines the DMRS port associated with the PTRS port based on the code point of the information indication field in the DCI, wherein the information indication field is used to indicate the association relationship between the PTRS port and the DMRS port.

[0298] In this example, the information indication field may occupy different bit widths.

[0299] Optionally, the bit width corresponding to the information indication field is a set value; or, the bit width corresponding to the information indication field is different when the number of transmission layers is different; wherein, the maximum number of ports is 1, and the actual number of PTRS ports is 1. The actual number is 1, that is, the actual transmission is a single PTRS port, such as PTRS port 0.

[0300] For example, if the value is set to 2, the DMRS port corresponding to the PTRS port when the number of transmission layers is greater than 1 is indicated by different code points of 2 bits in the information indication field. That is, when rank>1, 2 bits can be uniformly used for indication. Among them, when the actual number of PTRS ports is 1, the code points in the information indication field have a mapping relationship with the DMRS port, as shown in the mapping relationship between a single PTRS port and a DMRS port in Table 2-1 below:

[0301] Table 2-1

[0302] For another example, when the number of transmission layers is 2, the bit width of the information indication field is 1, and the DMRS port corresponding to the PTRS port is indicated by the different code points of 1 bit in the information indication field; or, when the number of transmission layers is 3, the bit width of the information indication field is 2, and the DMRS port corresponding to the PTRS port is indicated by the different code points of 2 bits in the information indication field.

[0303] When rank = 2 and the actual number of PTRS ports is 1, a 1-bit indication may be used, wherein the code point of the information indication field has a mapping relationship with the DMRS port, as shown in the mapping relationship between the PTRS port and the DMRS port in Table 2-2 below:

[0304] Table 2-2

[0305] When Rank=3 and the actual number of PTRS ports is 1, a 2-bit indication can be used, where the code point of the information indication field has a mapping relationship with the DMRS port, and the format can be referred to in Table 2-1.

[0306] In the example of the third aspect, the actual number of PTRS ports is 2, and the information indication field is used to indicate the DMRS port associated with any PTRS port in the corresponding DMRS port group; wherein, the maximum number of ports is 2, and the number of transmission layers is 2.

[0307] Optionally, when the actual number of PTRS ports is 2, it indicates that there are two actual PTRS ports, such as PTRS port 0 and PTRS port 1; their associated DMRS ports need to be determined separately. For example, the network side divides the DMRS ports corresponding to the SRS resources into two groups, indicating the association relationship between PTRS port 0 and the DMRS port, and the association relationship between PTRS port 1 and the DMRS port, respectively.

[0308] Optionally, when rank=2, the information indication field may explicitly indicate the DMRS port associated with one of the PTRS ports, and the DMRS port associated with the other PTRS port may be acquired implicitly.

[0309] Optionally, the bit width of the information indication field is 1, and a DMRS port associated with a predefined PTRS port in a corresponding DMRS port group is indicated by different code points of 1 bit in the information indication field.

[0310] In combination with the description of the aforementioned embodiment, a predefined PTRS port may be, for example, the first PTRS port or PTRS port 0. For example, when the actual number of PTRS ports is 2 and rank = 2, the code point of the information indication field has a mapping relationship with the DMRS port; refer to the mapping form of the following Table 2-3 to determine the DMRS port associated with PTRS port 0 based on different code points:

[0311] Table 2-3

[0312] Optionally, the bit width of the information indication field is 2, and a DMRS port associated with a predefined PTRS port is indicated by different code points of 2 bits in the information indication field.

[0313] In combination with the description of the aforementioned embodiment, a predefined PTRS port may be, for example, the first PTRS port or PTRS port 0. For example, when the actual number of PTRS ports is 2 and rank = 2, the code point of the information indication field has a mapping relationship with the DMRS port; with reference to the mapping form of Table 2-4, the DMRS port associated with PTRS port 0 is determined based on different code points:

[0314] Table 2-4

[0315] Alternatively, in other optional examples, the DMRS port associated with PTRS port 0 is indicated by the upper 1 bit (MSB) of the 2 bits, and the DMRS port associated with PTRS port 1 is indicated by the lower 1 bit (LSB) of the 2 bits, as shown in the mapping relationship in Table 2-5:

[0316] Table 2-5

[0317] In the example of the fourth aspect, the actual number of PTRS ports is 1, and the information indication field is used to indicate a DMRS port associated with a PTRS port; wherein, the maximum number of ports is 2, and the number of transmission layers is 2.

[0318] Optionally, when the maximum number of ports is 2 and rank=2, the bit width of the information indication field is 1 or 2, and the DMRS port associated with the PTRS port is indicated through different code points of the information indication field.

[0319] In the example of the fifth aspect, when the maximum number of PTRS ports is 2, the actual number of PTRS ports is 2, and rank = 3: the information indication field is used to indicate the SRS port group or PUSCH port group associated with any PTRS port, and the DMRS port in the corresponding DMRS port group is determined based on the SRS port group or PUSCH port group.

[0320] Optionally, taking two PTRS ports, namely PTRS port 0 and PTRS port 1, as an example, any PTRS port can be both PTRS port 0 and PTRS port 1.

[0321] Optionally, by indicating the SRS port group or PUSCH port group associated with the PTRS port, the corresponding DMRS port group may be indirectly determined, and then the associated DMRS port in the associated DMRS port group may be determined.

[0322] For example, taking SRS ports 0, 1 and 23 as an example, the grouping format of the SRS port grouping can include any of the following: {{0, 1}, 2}, {0, {1, 2}}, {{0, 2}, 1}. Taking {{0, 1}, 2} as an example, in this grouping format, {0, 1} is a group and 2 is a group.

[0323] Optionally, the bit width of the information indication field is 1 or 2, and different code points of the information indication field are used to indicate the port in the SRS port group or the port in the PUSCH group associated with the first PTRS port or the second PTRS port.

[0324] The first PTRS port may be PTRS port 0, and the second PTRS port may be PTRS port 1.

[0325] When indicated by 1 bit, the 1-bit code point can be used to indicate the port in the SRS port group or the port in the PUSCH group associated with the first PTRS port. When indicated by 2 bits, the 2-bit code point can be used to indicate the port in the SRS port group or the port in the PUSCH group associated with the first PTRS port.

[0326] Alternatively, when the maximum number of PTRS ports is 2, the actual number of PTRS ports is 2, and rank=3: the information indication field is used to indicate the DMRS port associated with each PTRS port in the corresponding DMRS port group.

[0327] Optionally, the information indication field needs to indicate the DMRS ports associated with PTRS port 0 and PTRS port 1 respectively.

[0328] For example, the bit width of the information indication field is 4, and the DMRS port associated with the first PTRS port is indicated by the upper 2 bits (MSB) of the information indication field, and the DMRS port associated with the second PTRS port is indicated by the lower 2 bits (LSB).

[0329] The first PTRS port may be PTRS port 0, and the second PTRS port may be PTRS port 1.

[0330] Alternatively, when the maximum number of PTRS ports is 2, the actual number of PTRS ports is 2, and rank = 3: the information indication field includes a first part and a second part, the first part is used to indicate the DMRS port associated with a PTRS port in the corresponding DMRS port group, and the second part is used to indicate the DMRS port associated with another PTRS port in the corresponding DMRS port group, and the number of bits in the first part and the second part are different.

[0331] For example, the bit width of the information indication field is 3, the first part includes the high-order 2 bits (MSB) of the information indication field, and the second part includes the low-order 1 bit (LSB) of the information indication field; the DMRS port associated with the first PTRS port is indicated by different code points in the first part, and the DMRS port associated with the second PTRS port among the remaining DMRS ports is indicated by different code points in the second part.

[0332] In the example of the sixth aspect, the PTRS port is associated with the set DMRS port, and the set DMRS port is predefined by the protocol or configured by the network device through signaling; wherein the DCI does not include an information indication field for indicating the association relationship between the PTRS port and the DMRS port.

[0333] In this example, the DCI does not include an information indication field or the bit width of the information indication field is 0, that is, the associated DMRS port is not determined by DCI indication, but the association relationship is defaulted by protocol definition or network configuration.

[0334] Optionally, the DMRS port is set to the first allocated DMRS port in the DMRS port group associated with the PTRS port; wherein the number of transmission layers indicated by the DCI is greater than 1 and the maximum number of ports is 1, or the maximum number of ports is 2 and the actual number of PTRS ports is 1.

[0335] For example, when rank>1 and the maximum number of PTRS ports is 1, the PTRS port can be fixedly associated with the set DMRS port. Alternatively, when rank>1 and the maximum number of PTRS ports is 2, and the actual number of PTRS ports is 1, the PTRS port can be fixedly associated with the set DMRS port.

[0336] Optionally, the actual number of PTRS ports is 2, the set DMRS port associated with one PTRS port is the first allocated DMRS port in the corresponding DMRS port group, and the set DMRS port associated with another PTRS port is the second allocated DMRS port in the corresponding DMRS port group; wherein, the number of transmission layers indicated by DCI is 2, and the maximum number of ports is 2.

[0337] For example, when rank=2 and the maximum number of PTRS ports is 2, and the actual number of PTRS ports is 2, PTRS port 0 is associated with the first allocated DMRS port by default, and PTRS port 1 is associated with the second allocated DMRS port by default.

[0338] Optionally, the actual number of PTRS ports is 2, and the set DMRS ports associated with the two PTRS ports are both: the first DMRS port in the DMRS port group corresponding to the SRS port group or the PUSCH port group; wherein the number of transmission layers indicated by the DCI is 3 and the maximum number of ports is 2.

[0339] For example, when rank = 3 and the maximum number of PTRS ports is 2, and the actual number of PTRS ports is 2, still taking the SRS port group including {{0, 1}, 2}, {0, {1, 2}}, {{0, 2}, 1} as an example, PTRS port 0 and PTRS port 1 can both be associated with the corresponding first DMRS port in the group.

[0340] Step S2105: Terminal 101 sends PTRS according to the DMRS port associated with the PTRS port.

[0341] Optionally, in combination with the description of the foregoing embodiment, the PTRS port and the DMRS port use the same precoding.

[0342] In some embodiments, when the actual number of PTRS ports is 1, the terminal 101 sends PTRS according to the DMRS port associated with the actual PTRS port; when the actual number of PTRS ports is 2, the terminal 101 sends PTRS according to the DMRS ports associated with two actual PTRS ports.

[0343] In some embodiments, if the terminal 101 is configured with enhanced PUSCH transmission, such as PUSCH repetition, and the number of repetitions is greater than 1, it is necessary to determine the method of sending PTRS in different transmission occasions (TO).

[0344] In some embodiments, for PUSCH transmission configured with repetition, the terminal 101 may use a PTRS cycling scheme in different TOs to respectively determine the DMRS port associated with the PTRS port in each TO.

[0345] Optionally, when the actual number of PTRS ports is 1 or 2, for the first TO of repeated transmission, the DMRS port associated with the PTRS port in the first TO can be determined based on different implementations in step S2104. The PTRS cycle is used to determine the DMRS ports associated with the PTRS ports in other TOs.

[0346] In one example, when rank = 3 and the maximum number of PTRS ports is 1 or 2, when the actual number of PTRS ports is determined to be 1, the DMRS ports associated with the PTRS ports in subsequent TOs are determined in a loop starting from a default position or a starting position in the DMRS port group associated with the PTRS port in the first TO. The default position may be the first DMRS port or a port configured through signaling from the network device 102. Alternatively, the default position may be the next DMRS port in the DMRS port group associated with the PTRS port in the first TO.

[0347] For example, if the DMRS port grouping is {0, 1, 2}, and the DMRS port associated with the PTRS port in the first TO is DMRS port 0, PTRS is transmitted on DMRS port 0 in the first TO. Starting from the default position of DMRS port 1, based on the PTRS cycle, the DMRS port associated with the PTRS port in the second TO is DMRS port 1, and PTRS is transmitted on DMRS port 1 in the second TO. The DMRS port associated with the PTRS port in the third TO is DMRS port 2, and the DMRS port associated with the PTRS port in the fourth TO is DMRS port 0, and so on. See Table 2-6 below.

[0348] Table 2-6

[0349] In another example, when rank = 3 and the maximum number of PTRS ports is 2, when the actual number of PTRS ports is confirmed to be 2, the DMRS ports associated with different PTRS ports need to be determined in each TO, and PTRS cycling is performed based on the DMRS port groups associated with different PTRS ports. In this case, the default position includes the default DMRS ports corresponding to different PTRS ports, such as the first DMRS port in the DMRS port group associated with different PTRS ports, or is configured through signaling. Alternatively, see the previous example.

[0350] For example, the DMRS port group associated with PTRS port 0 is {0, 1}, and the DMRS port group associated with PTRS port 1 is {2}. If the DMRS port associated with PTRS port 0 is determined to be DMRS port 0 and the DMRS port associated with PTRS port 1 is DMRS port 2 in the first TO, PTRS is sent on DMRS port 0 and DMRS port 2 respectively in the first TO. Assuming that the default position in {0, 1} is DMRS port 1, PTRS is sent on DMRS port 1 and DMRS port 2 respectively in the second TO... Since there is only one DMRS port in the DMRS port group associated with PTRS port 1, the DMRS port associated with PTRS port 1 in different TOs is DMRS port 2. See Table 2-7:

[0351] Table 2-7

[0352] In this example, if the types of repeated transmissions are different, TO may correspond to actual TO or nominal TO in the following embodiments.

[0353] Optionally, PUSCH repetition transmission includes two types: Type A and Type B.

[0354] As shown in Figure 2f, Type A is slot-aggregated PUSCH transmission, which is not suitable for situations with very low latency requirements and high reliability. A PUSCH is transmitted in K consecutive slots, corresponding to K TOs. Transmission begins at the Sth symbol in the starting slot and continues for L symbols in each TO. Furthermore, S + L cannot exceed the slot boundary. The number 2repetitions in the figure indicates two retransmissions, meaning the number of repeated transmissions is two.

[0355] Referring to Figures 2g to 2i, Type B supports a PUSCH repetition scheme in mini-slot units and allows PUSCH transmission to span time slots to further reduce latency. In the time domain, a PUSCH starts transmission at the Sth symbol in the starting time slot and continuously sends K TOs, where K is the nominal number of transmissions (nominal repetition); each TO occupies L symbols continuously (back-to-back), and transmission S+L can cross time slot boundaries. As shown in Figures 2h to 2j, when a TO crosses a time slot boundary, the transmission is re-divided, corresponding to the actual number of transmissions (actual repetition) K'. In Figure 2g, K = 2, L = 4, S = 4; in Figure 2h, K = 4, L = 4, S = 4; in Figure 2i, K = 1, L = 14, S = 4.

[0356] Optionally, for the entire transmission of Type B, time slot L*K represents the length of the time window for PUSCH transmission, and DL symbols in the window will be discarded and not used for PUSCH transmission. The network device 102 can indicate, via the Slot Format Indication (SFI), that the semi-static flexible symbols (Flexible) are dynamic UL symbols or dynamic DL symbols. Therefore, the semi-static flexible symbols may be usable or unusable for PUSCH. If there are unusable symbols, they need to be discarded and then transmitted on the remaining usable symbols.

[0357] Optionally, the transmission parameters of type A and type B, such as valid S and L combinations, can be referred to as shown in Table 2-8, and the definition of the redundant version (RV) of PUSCH transmission can be referred to as shown in Table 2-9.

[0358] Table 2-8

[0359] Table 2-9

[0360] For Type A repetitions, the RV mapping is directly mapped to the TO corresponding to all nominal repetitions (i.e., the nominal TO), and the RV field of the DCI indicates the initial value of the RV sequence. For Type B repetitions, the RV mapping is directly mapped to the TO corresponding to all actual repetitions (i.e., the actual TO), and the RV field of the DCI indicates the initial value of the RV sequence.

[0361] In this example, if the transmission is Type B repetitive, combined with the description of the previous embodiment, the nominal TO may be split into actual TOs. PTRS transmissions can be sent separately according to the actual TOs. For example, after the actual number of PTRS ports is determined, each TO in all actual TOs of a scheduled PUSCH corresponds to a PTRS transmission for the actual number of PTRS ports.

[0362] For example, if an uplink symbol conflict occurs in the nominal TO, the corresponding nominal TO is discarded for higher priority channel or signal transmission, or if a DL symbol or flexible symbol is configured as a DL symbol. As shown in Figure 2j, of the four nominal TOs, three are actual TOs that can be used for actual transmission, meaning the actual number of TOs is three. The second transmitted TO is discarded.

[0363] To facilitate understanding of the PTRS transmission method in different TOs under the aforementioned repeated transmission scenario, an example is given based on FIG2j: When rank = 3 and the maximum number of PTRS ports is 1 or 2, when the actual number of PTRS ports is determined to be 1 (this PTRS port can be recorded as PTRS port 0), the DMRS port group associated with this PTRS port is {0, 1, 2}. Based on the implementation method of step S2104, the DMRS port associated with the PTRS port in the first TO is determined to be DMRS port 1. Then, referring to Table 2-10, if there are no conflicting symbols, the DMRS ports associated with the PTRS ports in subsequent TOs refer to PTRS cyclic mapping method 1. If there are conflicting symbols in the second TO, the method for determining the DMRS ports associated with the PTRS ports in the subsequent TOs can refer to PTRS cyclic mapping method 2. In this case, the second TO is discarded, and its associated DMRS port does not need to be determined. Alternatively, if there are conflicting symbols in the second TO, the method for determining the DMRS port associated with the PTRS port in the subsequent TO can refer to PTRS cyclic mapping method 3. In this case, the second TO is not an actual TO, that is, no actual transmission is performed. However, when determining the DMRS port associated with the PTRS port in the third TO in the cycle {0, 1, 2}, the DMRS port associated with the PTRS port in the second TO needs to be skipped. In both methods 2 and 3, whether the DMRS port associated with the second TO is retained or not, it affects the DMRS ports associated with other TOs, but in both methods, the second TO will not send PTRS.

[0364] Table 2-10

[0365] In another example, when rank = 3 and the maximum number of PTRS ports is 2, when the actual number of PTRS ports is confirmed to be 2, the DMRS port group associated with PTRS port 0 in the first TO is {0, 1}, and the associated DMRS port is DMRS port 0; the DMRS port group associated with PTRS port 1 in the first TO is {2}, and the associated DMRS port is DMRS port 2. If there are no conflicting symbols or no discarded TOs, the DMRS ports associated with other TOs can still be determined by referring to the mapping method in Table 2-7.

[0366] In this example, if there is a conflicting symbol in the second TO, the method for determining the DMRS port associated with the PTRS port in other TOs can be found in Table 2-11. The DMRS port associated with PTRS port 0 in different TOs is determined according to method 1 and method 2 respectively; since there is only one DMRS port in the DMRS port group associated with PTRS port 1, the DMRS port associated with PTRS port 1 in different TOs is all DMRS port 2, and PTRS sending will not be performed in the second TO where the conflict occurs.

[0367] Table 2-11

[0368] In some embodiments, the network device 102 receives the PTRS at a suitable location and performs phase noise estimation based on the PTRS.

[0369] In some embodiments, the names of information, etc. are not limited to the names described in the embodiments, and terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", and "field" can be used interchangeably.

[0370] In some embodiments, "obtain", "get", "get", "receive", "transmit", "bidirectional transmission", "send and / or receive" can be interchangeable, and can be interpreted as receiving from other entities, obtaining from protocols, obtaining from higher layers, obtaining by self-processing, autonomous implementation, etc.

[0371] In some embodiments, terms such as "send", "transmit", "report", "download", "transmit", "bidirectional transmission", "send and / or receive" can be used interchangeably.

[0372] In some embodiments, the terms "radio", "wireless", "radio access network (RAN)", "access network (AN)", "RAN-based" and the like may be used interchangeably.

[0373] In some embodiments, terms such as "moment", "time point", "time", and "time position" can be replaced with each other, and terms such as "duration", "period", "time window", "window", and "time" can be replaced with each other.

[0374] In some embodiments, the terms "component carrier (CC)", "cell", "frequency carrier", "carrier frequency" and the like can be used interchangeably.

[0375] In some embodiments, terms such as "certain", "preset", "preset", "setting", "indicated", "a certain", "any", and "first" can be interchangeable. "Specific A", "preset A", "preset A", "setting A", "indicated A", "a certain A", "any A", and "first A" can be interpreted as A pre-specified in a protocol, etc., or as A obtained through setting, configuration, or indication, etc., or as specific A, a certain A, any A, or first A, etc., but not limited to this.

[0376] In some embodiments, the determination or judgment can be performed by a value represented by 1 bit (0 or 1), or by a true or false value (Boolean value) represented by true or false, or by comparison of numerical values ​​(for example, comparison with a predetermined value), but is not limited thereto.

[0377] In some embodiments, "not expecting to receive" can be interpreted as not receiving on time domain resources and / or frequency domain resources, or as not performing subsequent processing on the data after receiving it; "not expecting to send" can be interpreted as not sending, or as sending but not expecting the recipient to respond to the content sent.

[0378] The method involved in the embodiment of the present disclosure may include at least one of steps S2101 to S2105; for example, the method includes steps S2101 to S2104.

[0379] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 2 a .

[0380] FIG3 is a schematic diagram of a method for transmitting a phase tracking reference signal (PTRS) according to an embodiment of the present disclosure. As shown in FIG3 , an embodiment of the present disclosure relates to a method for transmitting a PTRS, which is executed by a terminal 101 and includes:

[0381] Step S3101: receiving configuration information sent by the network device 102.

[0382] Optionally, the implementation of step S3101 may refer to the implementation of step S2101 and will not be repeated here.

[0383] Optionally, the configuration information includes a maximum number of PTRS ports of the terminal in non-coherent transmission, and the terminal is a terminal with three transmitting antennas.

[0384] Step S3102: Receive DCI sent by the network device, and determine, according to the DCI, the DMRS port associated with the PTRS port when the PUSCH is scheduled.

[0385] Optionally, the implementation of step S3102 may refer to the implementation of steps S2102 to S2104, which will not be repeated here.

[0386] Step S3103: Send PTRS according to the DMRS port associated with the PTRS port.

[0387] Optionally, the implementation of step S3103 may refer to the implementation of step S2105 and will not be repeated here.

[0388] Optionally, the PTRS port and the DMRS port use the same precoding.

[0389] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 3 .

[0390] FIG4 is a schematic diagram illustrating a method for transmitting a phase tracking reference signal (PTRS) according to an embodiment of the present disclosure. As shown in FIG4 , an embodiment of the present disclosure relates to a method for transmitting a PTRS, which is executed by a network device 102 and includes:

[0391] Step S4101: Send configuration information to terminal 101.

[0392] Optionally, the implementation of step S3101 may refer to the implementation of step S2101 and will not be repeated here.

[0393] Optionally, the configuration information includes a maximum number of PTRS ports of the terminal in non-coherent transmission, and the terminal is a terminal with three transmitting antennas.

[0394] Step S4102, sending DCI to terminal 101.

[0395] Optionally, the implementation of step S3101 can refer to the implementation of step S2102, which will not be repeated here.

[0396] Optionally, the DCI is used to determine the DMRS port associated with the PTRS port when the PUSCH is scheduled, wherein the DMRS port associated with the PTRS port is used by the terminal to send the PTRS, and the PTRS port and the DMRS port use the same precoding. For example, see the implementation of steps S2103 to S2105, which will not be repeated here.

[0397] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 4 .

[0398] The method of the embodiment of the present disclosure is used to solve the uplink PTRS transmission solution of 3Tx terminals. It can realize PTRS transmission of 3Tx terminals under NC PUSCH transmission and define the PTRS-DMRS association relationship indication, so as to support the transmission of 3-port PUSCH based on the codebook. In addition, the method of this embodiment can be applied to PUSCH transmission with single time slot and multi-time slot repetition. To facilitate understanding of the embodiment of the present disclosure, some examples are listed below:

[0399] Example 1:

[0400] For 3Tx non-coherent PUSCH transmission, the maximum number of PTRS ports may be configured as 1 or 2.

[0401] Example 2:

[0402] Based on Example 1, if the maximum number of PTRS ports supported by the terminal is 1, you can use:

[0403] Option 1: through PTRS-DMRS association indication.

[0404] When RANK=1, this indicator field is not required; if the number of bits is 0;

[0405] When RANK>1, the following two methods are available:

[0406] Alt.1: For RANK>1, 2 bits are used uniformly for indication;

[0407] Alt.2: For RANK=2, use 1 bit for indication;

[0408] For RANK=3, 2 bits are used for indication.

[0409] Option 2: When RANK>1, association is performed by default.

[0410] Do not use DCI indication, for example, fixedly associate to the first DMRS port.

[0411] For PUSCH transmission with Repetition configured, PTRS cycling is used for different TOs, where:

[0412] Start the loop at the default position, such as the first DMRS port; or

[0413] Configure the port that starts the loop through signaling.

[0414] Example 3:

[0415] Based on Example 1, if the maximum number of PTRS ports is configured as 2, when RANK>1, change the existing rule and use the default fixed number of PTRS ports.

[0416] Option 1: Indicated via PTRS-DMRS indication field.

[0417] When RANK=1, no instruction is required;

[0418] When RANK=2, the following methods are available:

[0419] Case 1: The number of PTRS ports is fixed to 2:

[0420] Alt.1: Use 1 bit for the indication of the first PTRS port;

[0421] Alt.2: 2 bits are uniformly used for the indication of the first PTRS port;

[0422] Alt.3: Default association, no indication.

[0423] Case 2: The number of PTRS ports is fixed to 1:

[0424] Alt.1: Use 1 bit for port indication;

[0425] Alt.2: Use 2 bits to indicate the PTRS port;

[0426] Alt.3: Default association relationship.

[0427] Case 2: The number of PTRS ports is fixed to 1:

[0428] When RANK=3, the number of PTRS ports is fixed to 2 and DCI indication is required:

[0429] Alt.1: The corresponding SRS port grouping is {{0,1},2},{0,{1,2}},{{0,2},1}, then 1 or 2 bits are used to indicate the first or second PTRS port;

[0430] Among them, the port grouping is achieved by reporting the grouping situation by the terminal or by predefined settings;

[0431] Alt.2: Use 2 bits for each PTRS port, for a total of 4 bits;

[0432] Alt.3: Use 2 bits to indicate PTRS port 0 and use 1 bit to indicate the associated port among the remaining DMRS ports.

[0433] DCI: 2 bits defined as MSB or LSB.

[0434] Option 2: When RANK>1, association is performed by default and DCI indication is not used.

[0435] When RANK=2,

[0436] Case 1: The number of PTRS ports is fixed at 2.

[0437] By default, PTRS port 0 is associated with the first DMRS port, and PTRS port 1 is associated with the second DMRS port.

[0438] Case 2: The number of PTRS ports is fixed to 1.

[0439] The default association relationship does not require indication, for example, fixed association to the first DMRS port;

[0440] When RANK=3, the number of fixed PTRS ports is 2;

[0441] The corresponding SRS port groups are {{0,1},2},{0,{1,2}},{{0,2},1}, and are associated with the first DMRS port in the group by default;

[0442] For PUSCH transmission configured with Repetition, PTRS cycling is used for different TOs;

[0443] The default DMRS port positions corresponding to different PTRS ports are respectively cycled in the DMRS port groups corresponding to the respective PTRS ports, such as the first DMRS port respectively.

[0444] The embodiments of the present disclosure further provide an apparatus for implementing any of the above methods. For example, an apparatus is provided, comprising units or modules for implementing each step performed by a terminal in any of the above methods. For another example, another apparatus is provided, comprising units or modules for implementing each step performed by a network device (e.g., an access network device, a core network function node, a core network device, etc.) in any of the above methods.

[0445] It should be understood that the division of the various units or modules in the above device is merely a division of logical functions. In actual implementation, they may be fully or partially integrated into a physical entity, or they may be physically separated. In addition, the units or modules in the device may be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, and the memory stores instructions. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the various units or modules of the above device, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory within the device or a memory outside the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits, and the functions of some or all of the units or modules can be realized by designing the hardware circuits. The above-mentioned hardware circuits can be understood as one or more processors; for example, in one implementation, the above-mentioned hardware circuit is an application-specific integrated circuit (ASIC), which realizes the functions of some or all of the above units or modules by designing the logical relationship of the components in the circuit; for example, in another implementation, the above-mentioned hardware circuit can be realized by a programmable logic device (PLD). Taking a field programmable gate array (FPGA) as an example, it can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by configuring the configuration file, thereby realizing the functions of some or all of the above units or modules. All units or modules of the above devices can be realized in the form of software called by the processor, or in the form of hardware circuits, or in part by the form of software called by the processor, and the rest by hardware circuits.

[0446] In the embodiments of the present disclosure, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction reading and execution capabilities, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP). In another implementation, the processor can implement certain functions through the logical relationship of the hardware circuit. The logical relationship of the above-mentioned hardware circuit is fixed or reconfigurable. For example, the processor is a hardware circuit implemented by an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document and implementing the hardware circuit configuration can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0447] Figure 5a is a schematic diagram of the structure of a terminal proposed in an embodiment of the present disclosure. As shown in Figure 5a, the terminal 5100 may include: at least one of a transceiver module 5101, a processing module 5102, etc. In some embodiments, the transceiver module 5101 is used to receive configuration information sent by a network device, the configuration information including the maximum number of PTRS ports of the terminal in non-coherent transmission, and the terminal is a terminal with three transmitting antennas. The transceiver module 5101 is also used to receive downlink control information DCI sent by the network device; the processing module 5102 determines the demodulation reference signal DMRS port associated with the PTRS port when the physical uplink shared channel PUSCH is scheduled based on the DCI; the transceiver module 5101 is also used to send PTRS based on the DMRS port associated with the PTRS port, wherein the PTRS port and the DMRS port use the same precoding.

[0448] Optionally, the transceiver module 5101 is configured to execute at least one of the communication steps of sending and / or receiving performed by the terminal 101 in any of the above methods, which are not described in detail here. Optionally, the processing module 5102 is configured to execute at least one of the other steps performed by the terminal 101 in any of the above methods, which are not described in detail here.

[0449] Figure 5b is a schematic diagram of the structure of a terminal proposed in an embodiment of the present disclosure. As shown in Figure 5b, network device 5200 may include at least one of: a transceiver module 5201, a processing module 5202, etc. In some embodiments, the transceiver module 5201 is used to send configuration information to the terminal, the configuration information including the maximum number of PTRS ports for the terminal in non-coherent transmission, where the terminal is a terminal with three transmit antennas. The transceiver module 5201 is also used to send DCI to the terminal, where the DCI is used to determine the DMRS port associated with the PTRS port when the PUSCH is scheduled, wherein the DMRS port associated with the PTRS port is used for the terminal to transmit the PTRS, and the PTRS port and the DMRS port use the same precoding.

[0450] Optionally, the transceiver module 5201 is configured to execute at least one of the communication steps of sending and / or receiving performed by the network device 102 in any of the above methods, which are not described in detail here. Optionally, the processing module 5202 is configured to execute at least one of the other steps performed by the network device 102 in any of the above methods, which are not described in detail here.

[0451] In some embodiments, the transceiver module may include a transmitting module and / or a receiving module, and the transmitting module and the receiving module may be separate or integrated. Optionally, the transceiver module may be interchangeable with the transceiver.

[0452] In some embodiments, the processing module can be a single module or can include multiple submodules. Optionally, the multiple submodules respectively execute all or part of the steps required to be executed by the processing module. Optionally, the processing module can be interchangeable with the processor.

[0453] Figure 6a is a schematic diagram of the structure of a communication device 6100 proposed in an embodiment of the present disclosure. Communication device 6100 can be a network device (e.g., an access network device, a core network device, etc.), a terminal (e.g., a user equipment, etc.), a chip, a chip system, or a processor that supports a network device implementing any of the above methods, or a chip, a chip system, or a processor that supports a terminal implementing any of the above methods. Communication device 6100 can be used to implement the methods described in the above method embodiments. For details, please refer to the description of the above method embodiments.

[0454] As shown in Figure 6a, the communication device 6100 includes one or more processors 6101. The processor 6101 can be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process the communication protocol and communication data, and the central processing unit can be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute programs, and process program data. Optionally, the communication device 6100 is used to perform any of the above methods. Optionally, one or more processors 6101 are used to call instructions to enable the communication device 6100 to perform any of the above methods.

[0455] In some embodiments, the communication device 6100 further includes one or more transceivers 6102. When the communication device 6100 includes one or more transceivers 6102, the transceiver 6102 performs at least one of the communication steps, such as sending and / or receiving, in the above-described method, and the processor 6101 performs at least one of the other steps. In an optional embodiment, the transceiver may include a receiver and / or a transmitter, and the receiver and transmitter may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, transceiver circuit, interface circuit, and interface may be used interchangeably; the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be used interchangeably; and the terms receiver, receiving unit, receiver, and receiving circuit may be used interchangeably.

[0456] In some embodiments, the communication device 6100 further includes one or more memories 6103 for storing data. Alternatively, all or part of the memories 6103 may be located outside the communication device 6100. In alternative embodiments, the communication device 6100 may include one or more interface circuits 6104. Optionally, the interface circuits 6104 are connected to the memories 6103 and may be configured to receive data from the memories 6103 or other devices, or to send data to the memories 6103 or other devices. For example, the interface circuits 6104 may read data stored in the memories 6103 and send the data to the processor 6101.

[0457] The communication device 6100 described in the above embodiment may be a network device or a terminal, but the scope of the communication device 6100 described in the present disclosure is not limited thereto, and the structure of the communication device 6100 may not be limited by FIG. 6a. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: 1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data or programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, an in-vehicle device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0458] FIG6b is a schematic diagram of the structure of a chip 6200 according to an embodiment of the present disclosure. If the communication device 6100 can be a chip or a chip system, reference can be made to the schematic diagram of the structure of the chip 6200 shown in FIG6b , but the present disclosure is not limited thereto.

[0459] The chip 6200 includes one or more processors 6201. The chip 6200 is configured to execute any of the above methods.

[0460] In some embodiments, chip 6200 further includes one or more interface circuits 6202. Terms such as interface circuit, interface, and transceiver pins may be used interchangeably. In some embodiments, chip 6200 further includes one or more memories 6203 for storing data. Alternatively, all or part of memory 6203 may be located external to chip 6200. Optionally, interface circuit 6202 is connected to memory 6203 and may be used to receive data from memory 6203 or other devices, or may be used to send data to memory 6203 or other devices. For example, interface circuit 6202 may read data stored in memory 6203 and send the data to processor 6201.

[0461] In some embodiments, the interface circuit 6202 performs at least one of the communication steps, such as sending and / or receiving, in the above-described method. For example, the interface circuit 6202 performing the communication steps, such as sending and / or receiving, in the above-described method means that the interface circuit 6202 performs data exchange between the processor 6201, the chip 6200, the memory 6203, or the transceiver device. In some embodiments, the processor 6201 performs at least one of the other steps.

[0462] The modules and / or devices described in various embodiments, such as virtual devices, physical devices, and chips, can be arbitrarily combined or separated according to circumstances. Optionally, some or all steps can also be performed collaboratively by multiple modules and / or devices, which is not limited here.

[0463] The present disclosure also proposes a storage medium having instructions stored thereon. When the instructions are executed on the communication device 6100, the communication device 6100 executes any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but is not limited thereto and may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but is not limited thereto and may also be a transient storage medium.

[0464] The present disclosure also provides a program product, which, when executed by the communication device 6100, enables the communication device 6100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0465] The present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to perform any one of the above methods. Industrial Applicability

[0466] Terminals supporting 3Tx can obtain configuration information from network devices and learn the maximum number of PTRS ports. Based on this information, the terminal can determine the DMRS port associated with the PTRS port and send PTRS through the associated DMRS port. This allows 3Tx terminals to effectively transmit PTRS and improves the accuracy of the network-side estimation of the 3Tx terminal's phase noise.

Claims

1. A method for transmitting a Phase Tracking Reference Signal (PTRS), the method comprising: A terminal receives configuration information sent by a network device, the configuration information including the maximum number of ports of the Phase Tracking Reference Signal (PTRS) in non-coherent transmission, and the terminal is a terminal with 3 transmit antennas; The terminal receives Downlink Control Information (DCI) sent by the network device, and determines, according to the DCI, the Demodulation Reference Signal (DMRS) port associated with the PTRS port when a Physical Uplink Shared Channel (PUSCH) is scheduled; The terminal transmits the PTRS according to the DMRS port associated with the PTRS port, wherein the PTRS port and the DMRS port use the same precoding.

2. The method according to claim 1, wherein, The DMRS port associated with the PTRS port belongs to the DMRS port group associated with the PTRS port, wherein the DMRS port group includes at least one DMRS port, and the at least one DMRS port satisfies a set order.

3. The method according to claim 2, wherein, The grouping method of the DMRS port group is the same as the grouping method of the Sounding Reference Signal (SRS) port group or the Physical Uplink Shared Channel (PUSCH) port group.

4. The method according to claim 3, wherein, The grouping method is predefined by a protocol or configured by the network device.

5. The method according to any one of claims 2 to 4, wherein The method further comprises: The terminal determines the actual number of the PTRS ports according to a Transmission Precoding Matrix Indicator (TPMI) and an SRS port group, or the terminal determines the actual number of the PTRS ports according to the TPMI and a PUSCH port group; or, The actual number of the PTRS ports is predefined or default; or, The actual number of the PTRS ports is determined according to the configuration information; wherein, the TPMI is carried in the DCI.

6. The method according to claim 5, wherein, When the number of transmission layers of the PUSCH is greater than 1 and the maximum number of ports is 2, the actual number of the PTRS ports is determined by the number of SRS port groups or PUSCH port groups actually corresponding to different data layers of the TPMI.

7. The method according to claim 6, wherein, All data layers of the TPMI are transmitted through 1 SRS port group or PUSCH port group, and the actual number of the PTRS ports is 1; or, All data layers of the TPMI are transmitted through 2 SRS port groups or PUSCH port groups, and the actual number of the PTRS ports is 2.

8. The method according to any one of claims 1 to 7, wherein, When the DCI indicates that the number of transmission layers of the PUSCH is 1, the terminal determines that the actual number of the PTRS ports is 1, and one DMRS port is associated and allocated to the PTRS port; wherein, the maximum number of ports of the PTRS is 1 or 2, and the DCI includes an information indication field with a bit width of 0, and the information indication field is used to indicate the association relationship between the PTRS port and the DMRS port.

9. The method according to any one of claims 1 to 7, wherein, when the number of transmission layers of the PUSCH is indicated to be greater than 1 in the DCI, the terminal determines the DMRS ports associated with the PTRS port according to the code points in the information indication field in the DCI, wherein the information indication field is used to indicate the association relationship between the PTRS port and the DMRS ports.

10. The method according to claim 9, wherein, the bit width corresponding to the information indication field is a set value; or, the bit width corresponding to the information indication field is different when the number of transmission layers of the PUSCH is different; wherein, the maximum number of ports of the PTRS is 1, and the actual number of PTRS ports is 1.

11. The method according to claim 10, wherein, the set value is 2, and the code points of 2 bits in the information indication field are used to indicate the DMRS ports corresponding to the PTRS port when the number of transmission layers is greater than 1.

12. The method according to claim 10, wherein, when the number of transmission layers of the PUSCH is 2, the bit width of the information indication field is 1, and the code points of 1 bit in the information indication field are used to indicate the DMRS ports corresponding to the PTRS port; or, when the number of transmission layers of the PUSCH is 3, the bit width of the information indication field is 2, and the code points of 2 bits in the information indication field are used to indicate the DMRS ports corresponding to the PTRS port.

13. The method according to claim 9, wherein, the actual number of PTRS ports is 2, and the information indication field is used to indicate the DMRS ports associated with any one of the PTRS ports in the corresponding DMRS port group; wherein, the maximum number of ports of the PTRS is 2, and the number of transmission layers of the PUSCH is 2.

14. The method according to claim 13, wherein, the bit width of the information indication field is 1, and the code points of 1 bit in the information indication field are used to indicate the DMRS ports associated with a predefined PTRS port in the corresponding DMRS port group.

15. The method according to claim 13, wherein, the bit width of the information indication field is 2, and the different code points of 2 bits in the information indication field are used to indicate the DMRS ports associated with a predefined PTRS port.

16. The method according to claim 9, wherein, the actual number of PTRS ports is 1, and the information indication field is used to indicate the DMRS ports associated with one PTRS port; wherein, the maximum number of ports of the PTRS is 2, and the number of transmission layers of the PUSCH is 2.

17. The method according to claim 16, wherein, the bit width of the information indication field is 1 or 2, and the different code points of the information indication field are used to indicate the DMRS ports associated with the PTRS port.

18. The method according to claim 9, wherein, The actual number of the PTRS ports is 2, and the information indication field is used to indicate the SRS port group or PUSCH port group associated with any one of the PTRS ports, and determine the DMRS ports in the corresponding DMRS port group based on the SRS port group or the PUSCH port group; or, the information indication field is used to indicate the DMRS ports associated with each PTRS port in the corresponding DMRS port group; or, the information indication field includes a first part and a second part, the first part is used to indicate the DMRS ports associated with one PTRS port in the corresponding DMRS port group, the second part is used to indicate the DMRS ports associated with another PTRS port in the corresponding DMRS port group, and the number of bits of the first part is different from that of the second part; wherein, the maximum number of ports of the PTRS is 2, and the number of transmission layers of the PUSCH is 3.

19. The method according to claim 18, wherein, the bit width of the information indication field is 1 or 2, and different code points of the information indication field are used to indicate the ports in the SRS port group or the PUSCH group associated with the first PTRS port or the second PTRS port.

20. The method according to claim 18, wherein, the bit width of the information indication field is 4, the high 2 bits of the information indication field are used to indicate the DMRS ports associated with the first PTRS port, and the low 2 bits are used to indicate the DMRS ports associated with the second PTRS port.

21. The method according to claim 18, wherein, the bit width of the information indication field is 3, the first part includes the high 2 bits of the information indication field, and the second part includes the low 1 bit of the information indication field; different code points of the first part are used to indicate the DMRS ports associated with the first PTRS port, and different code points of the second part are used to indicate the DMRS ports associated with the second PTRS port among the remaining DMRS ports.

22. The method according to any one of claims 1 to 7, wherein, the PTRS port is associated with a set DMRS port, and the set DMRS port is predefined by the protocol or configured by the network device through signaling; wherein, the DCI does not include an information indication field for indicating the association relationship between the PTRS port and the DMRS port.

23. The method according to claim 22, wherein, the set DMRS port is the first allocated DMRS port in the DMRS port group associated with the PTRS port; wherein, the number of transmission layers indicated by the DCI is greater than 1, the maximum number of ports of the PTRS is 1, or the maximum number of ports of the PTRS is 2 and the actual number of the PTRS ports is 1.

24. The method according to claim 22, wherein, The actual number of the PTRS ports is 2. The set DMRS port associated with one PTRS port is the first allocated DMRS port in the corresponding DMRS port group, and the set DMRS port associated with the other PTRS port is the second allocated DMRS port in the corresponding DMRS port group; Wherein, the number of transmission layers indicated by the DCI is 2, and the maximum number of ports of the PTRS is 2.

25. The method according to claim 22, wherein, The actual number of the PTRS ports is 2. The set DMRS ports associated with the two PTRS ports are both: the first DMRS port in the DMRS port group corresponding to the SRS port group or the PUSCH port group; Wherein, the number of transmission layers indicated by the DCI is 3, and the maximum number of ports of the PTRS is 2.

26. A method for transmitting PTRS, the method comprising: A network device sends configuration information to a terminal, the configuration information includes the maximum number of ports of the PTRS in non-coherent transmission of the terminal, and the terminal is a terminal with 3 transmit antennas; The network device sends DCI to the terminal, the DCI is used to determine the DMRS port associated with the PTRS port when the PUSCH is scheduled, wherein, the DMRS port associated with the PTRS port is used for the terminal to send PTRS, and the PTRS port and the DMRS port use the same precoding.

27. The method according to claim 26, wherein, The DMRS port associated with the PTRS port belongs to the DMRS port group associated with the PTRS port, wherein, the DMRS port group includes at least one DMRS port, and the at least one DMRS port satisfies a set order.

28. The method according to claim 27, wherein, The grouping method of the DMRS port group is the same as the grouping method of the SRS port group or the PUSCH port group.

29. The method according to claim 28, wherein, The grouping method is predefined by the protocol or configured by the network device.

30. The method according to any one of claims 27 to 29, wherein, The actual number of the PTRS ports is determined according to the TPMI and the SRS port group; or, The actual number of the PTRS ports is determined according to the TPMI and the PUSCH port group; or, The actual number of the PTRS ports is predefined or default; or, The actual number of the PTRS ports is determined according to the configuration information; Wherein, the TPMI is carried in the DCI.

31. The method according to claim 30, wherein, When the number of transmission layers of the PUSCH is greater than 1 and the maximum number of ports is 2, the actual number of the PTRS ports is determined by the number of the SRS port groups or the PUSCH port groups actually corresponding to different data layers of the TPMI.

32. The method according to claim 31, wherein, All data layers of the TPMI are transmitted through one SRS port group or PUSCH port group, and the actual number of the PTRS ports is 1; or, All data layers of the TPMI are transmitted through two SRS port groups or PUSCH port groups, and the actual number of the PTRS ports is 2.

33. The method according to any one of claims 26 to 32, wherein, When the number of transmission layers of the PUSCH is indicated as 1 in the DCI, the actual number of the PTRS ports is 1, and one DMRS port associated with the PTRS port is allocated; Wherein, the maximum number of the PTRS ports is 1 or 2, the DCI includes an information indication field with a bit width of 0, and the information indication field is used to indicate the association relationship between the PTRS port and the DMRS port.

34. The method according to any one of claims 26 to 32, wherein, When the number of transmission layers of the PUSCH is indicated as greater than 1 in the DCI, the code point of the information indication field in the DCI is used to determine the DMRS port associated with the PTRS port, wherein the information indication field is used to indicate the association relationship between the PTRS port and the DMRS port.

35. The method according to claim 34, wherein, The bit width corresponding to the information indication field is a set value; or, The bit width corresponding to the information indication field is different when the number of transmission layers is different; Wherein, the maximum number of the PTRS ports is 1, and the actual number of the PTRS ports is 1.

36. The method according to claim 35, wherein, The set value is 2, and different code points of 2 bits in the information indication field are used to indicate the DMRS port corresponding to the PTRS port when the number of transmission layers is greater than 1.

37. The method according to claim 35, wherein, When the number of transmission layers of the PUSCH is 2, the bit width of the information indication field is 1, and the code point of 1 bit in the information indication field is used to indicate the DMRS port corresponding to the PTRS port; or, When the number of transmission layers of the PUSCH is 3, the bit width of the information indication field is 2, and the code point of 2 bits in the information indication field is used to indicate the DMRS port corresponding to the PTRS port.

38. The method according to claim 34, wherein, The actual number of the PTRS ports is 2, and the information indication field is used to indicate the DMRS port associated with any one of the PTRS ports in the corresponding DMRS port group; wherein, the maximum number of the PTRS ports is 2, and the number of transmission layers of the PUSCH is 2.

39. The method according to claim 38, wherein, The bit width of the information indication field is 1, and the code point of 1 bit in the information indication field is used to indicate the DMRS port associated with a predefined PTRS port in the corresponding DMRS port group.

40. The method according to claim 38, wherein, The bit width of the information indication field is 2, and a DMRS port associated with a predefined PTRS port is indicated by the 2-bit code point in the information indication field.

41. The method according to claim 34, wherein the actual number of the PTRS ports is 1, and the information indication field is used to indicate the DMRS port associated with one PTRS port; wherein the maximum number of ports of the PTRS is 2, and the number of transmission layers of the PUSCH is 2.

42. The method according to claim 41, wherein the bit width of the information indication field is 1 or 2, and the DMRS port associated with the PTRS port is indicated by different code points of the information indication field.

43. The method according to claim 34, wherein the actual number of the PTRS ports is 2, and the information indication field is used to indicate an SRS port group or a PUSCH port group associated with any one of the PTRS ports, and the DMRS ports in the corresponding DMRS port group are determined based on the SRS port group or the PUSCH port group; or the information indication field is used to indicate the DMRS ports associated with each PTRS port in the corresponding DMRS port group; or the information indication field includes a first part and a second part, the first part is used to indicate the DMRS port associated with one PTRS port in the corresponding DMRS port group, the second part is used to indicate the DMRS port associated with another PTRS port in the corresponding DMRS port group, and the number of bits of the first part is different from that of the second part; wherein the maximum number of ports of the PTRS is 2, and the number of transmission layers of the PUSCH is 3.

44. The method according to claim 43, wherein the bit width of the information indication field is 1 or 2, and the ports in the SRS port group or the PUSCH group associated with the first PTRS port or the second PTRS port are indicated by different code points of the information indication field.

45. The method according to claim 43, wherein the bit width of the information indication field is 4, the upper 2 bits of the information indication field are used to indicate the DMRS port associated with the first PTRS port, and the lower 2 bits are used to indicate the DMRS port associated with the second PTRS port.

46. The method according to claim 43, wherein the bit width of the information indication field is 3, the first part includes the upper 2 bits of the information indication field, and the second part includes the lower 1 bit of the information indication field; the DMRS port associated with the first PTRS port is indicated by different code points of the first part, and the DMRS port associated with the second PTRS port among the remaining DMRS ports is indicated by different code points of the second part.

47. The method according to any one of claims 26 to 32, wherein The PTRS port is associated with a configured DMRS port, where the configured DMRS port is predefined by the protocol or configured by the network device through signaling; wherein, the DCI does not include an information indication field for indicating the association relationship between the PTRS port and the DMRS port.

48. The method according to claim 47, wherein, The configured DMRS port is the first allocated DMRS port in the DMRS port group associated with the PTRS port; wherein, the number of transmission layers indicated by the DCI is greater than 1, the maximum number of ports of the PTRS is 1, or the maximum number of ports is 2 and the actual number of PTRS ports is 1.

49. The method according to claim 47, wherein, The actual number of PTRS ports is 2. The configured DMRS port associated with one PTRS port is the first allocated DMRS port in the corresponding DMRS port group, and the configured DMRS port associated with the other PTRS port is the second allocated DMRS port in the corresponding DMRS port group; wherein, the number of transmission layers indicated by the DCI is 2, and the maximum number of ports of the PTRS is 2.

50. The method according to claim 47, wherein, The actual number of PTRS ports is 2. The configured DMRS ports associated with the two PTRS ports are both the first DMRS port in the DMRS port group corresponding to the SRS port group or the PUSCH port group; wherein, the number of transmission layers indicated by the DCI is 3, and the maximum number of ports is 2.

51. A terminal, comprising: a transceiver module, configured to receive configuration information sent by a network device, where the configuration information includes the maximum number of ports of the PTRS in non-coherent transmission, and the terminal is a terminal with 3 transmit antennas; The transceiver module is further configured to receive the downlink control information DCI sent by the network device; a processing module, configured to determine the demodulation reference signal DMRS port associated with the PTRS port when the physical uplink shared channel PUSCH is scheduled according to the DCI; The transceiver module is further configured to send the PTRS according to the DMRS port associated with the PTRS port, where the PTRS port and the DMRS port use the same precoding.

52. A network device, comprising: a transceiver module, configured to send configuration information to a terminal, where the configuration information includes the maximum number of ports of the PTRS in non-coherent transmission, and the terminal is a terminal with 3 transmit antennas; The transceiver module is further configured to send DCI to the terminal, where the DCI is used to determine the DMRS port associated with the PTRS port when the PUSCH is scheduled, and the DMRS port associated with the PTRS port is used for the terminal to send the PTRS, and the PTRS port and the DMRS port use the same precoding.

53. A communication device, comprising: one or more processors; wherein, the communication device is configured to execute the method according to any one of claims 1 to 25 or the method according to any one of claims 26 to 50.

54. A communication system, comprising a terminal and a network device, wherein, the terminal is configured to implement the method according to any one of claims 1 to 25; the network device is configured to implement the method according to any one of claims 26 to 50.

55. A storage medium storing instructions, wherein, when the instructions run on a communication device, the communication device is caused to execute the method according to any one of claims 1 to 25 or 26 to 50.

Images