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] This disclosure relates to the field of communication technology, and in particular to a phase tracking reference signal transmission method, terminal, device, system and medium. Background Technology

[0002] In communication transmission, phase noise (PN) causes common phase error (CPE), and its impact is more pronounced in high-frequency communication. Terminals can transmit a phase tracking reference signal (PTRS) to allow network devices to estimate the phase noise.

[0003] Summary of the Invention

[0004] The problem of how high-transmission-capability terminals, such as those supporting 3 transmit antennas (3Tx), can transmit PTRS needs to be solved.

[0005] This disclosure provides a method, terminal, device, system, and medium for transmitting a phase tracking reference signal (PTRS).

[0006] In a first aspect, embodiments of this disclosure provide a PTRS transmission method, including:

[0007] The terminal receives configuration information sent by the network device. The configuration information includes the maximum number of PTRS ports for the terminal in noncoherent transmission (NC). The terminal is a terminal with 3 transmit 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 PTRS based on the DMRS port associated with the PTRS port, where the PTRS port and the DMRS port use the same precoding.

[0010] Secondly, embodiments of this disclosure provide a PTRS transmission method, the method comprising:

[0011] The network device sends configuration information to the terminal, which includes the maximum number of PTRS ports for the terminal in non-coherent transmission. The terminal is a terminal with 3 transmit antennas.

[0012] The network device sends a 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] Thirdly, embodiments of this disclosure provide a terminal, including:

[0014] The transceiver module is used to receive configuration information sent by network devices. The configuration information includes the maximum number of PTRS ports for the terminal in non-coherent transmission. The terminal is a terminal with 3 transmit antennas.

[0015] The transceiver module is also used to receive downlink control information (DCI) sent by network devices;

[0016] The processing module is used to determine the demodulation reference signal DMRS port associated with the PTRS port when the Physical Uplink Shared Channel (PUSCH) is scheduled, based on the DCI.

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

[0018] Fourthly, embodiments of this disclosure provide a network device, including:

[0019] The transceiver module is used to send configuration information to the terminal. The configuration information includes the maximum number of PTRS ports for the terminal in non-coherent transmission. The terminal is a terminal with 3 transmit antennas.

[0020] The transceiver module is also used to send DCI to the terminal. 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.

[0021] Fifthly, embodiments of this disclosure provide a communication device, including:

[0022] One or more processors;

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

[0024] Sixthly, embodiments of this disclosure provide 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 second aspect of the method.

[0027] In a seventh aspect, embodiments of this disclosure provide a storage medium storing instructions, wherein...

[0028] When the instruction is executed on the communication device, it causes the communication device to perform the method as described in the first aspect or the second aspect.

[0029] In this embodiment, a 3Tx-enabled terminal can obtain configuration information from the network device to determine the maximum number of PTRS ports. Based on this, the terminal can identify the DMRS port associated with the PTRS port and transmit PTRS through the associated DMRS port. This allows for effective PTRS transmission for 3Tx terminals, improving the accuracy of the network side's estimation of the phase noise of 3Tx terminals. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings required for the description of the embodiments are introduced below. The following drawings are only some embodiments of this disclosure and do not impose specific limitations on the protection scope of this disclosure.

[0031] Figure 1a is an exemplary schematic diagram of the architecture of a communication system provided according to an embodiment of the present disclosure;

[0032] Figures 1b to 1e are schematic diagrams illustrating the structure of a DMRS according to an exemplary embodiment;

[0033] Figure 2a is an exemplary interactive schematic 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 architecture provided according to embodiments of the present disclosure;

[0035] Figures 2f to 2j are schematic diagrams of repeated transmissions provided according to embodiments of the present disclosure;

[0036] Figure 3 is an exemplary flowchart of a method provided according to an embodiment of the present disclosure;

[0037] Figure 4 is an exemplary flowchart of a method provided according to an embodiment of the present disclosure;

[0038] Figure 5a is a schematic diagram of the structure of a terminal according to an embodiment of the present disclosure;

[0039] Figure 5b is a schematic diagram of the structure of a network device according to an embodiment of the present disclosure;

[0040] Figure 6a is a schematic diagram of a communication device according to an embodiment of the present disclosure;

[0041] Figure 6b is a schematic diagram of a communication device according to an embodiment of the present disclosure. Detailed Implementation

[0042] This disclosure provides a method, terminal, device, system, and medium for transmitting a phase tracking reference signal (PTRS).

[0043] In a first aspect, embodiments of this disclosure provide a PTRS transmission method, including:

[0044] The terminal receives configuration information sent by the network device. The configuration information includes the maximum number of ports of the phase tracking reference signal PTRS in non-coherent transmission. The terminal is a terminal with 3 transmit antennas.

[0045] 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.

[0046] The terminal sends PTRS based on the DMRS port associated with the PTRS port, where the PTRS port and the DMRS port use the same precoding.

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

[0048] In conjunction with the embodiments of the first aspect, in some embodiments, 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.

[0049] In the above embodiments, the terminal can determine the associated DMRS port in the DMRS port group associated with the PTRS port, thereby determining the appropriate DMRS port to send PTRS.

[0050] In conjunction with the embodiments of the first aspect, in some embodiments, the grouping method of the DMRS port group is the same as that of the Sounding Reference Signal (SRS) port group or the PUSCH port group.

[0051] In the above embodiments, DMRS port packets are associated with SRS port packets or PUSCH port packets so that the DMRS port associated with the PTRS port can be determined through SRS port packets or PUSCH port packets, thereby improving the flexibility of determining the associated DMRS port in non-coherent transmission.

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

[0053] In the above embodiments, the terminal can learn the grouping method of DMRS port group, SRS port group or PUSCH port group based on protocol definition or network configuration, which makes it easier 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 the Transmission Precoding Matrix Indicator (TPMI) and SRS port packets, or based on the TPMI and PUSCH port packets; or...

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

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

[0058] TPMI is carried within DCI.

[0059] In the above embodiments, the terminal can determine the actual number of PTRS ports based on various methods, thereby determining the DMRS ports associated with the actual number of PTRS ports in order to effectively send PTRS.

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

[0061] When the PUSCH transport layer rank 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 packets or PUSCH port packets corresponding to different data layers of TPMI.

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

[0063] All data layers of TPMI are transmitted via packets from two SRS ports or PUSCH ports, with the actual number of PTRS ports being two.

[0064] In the above embodiments, it is illustrated how the terminal determines the actual number of PTRS ports based on TPMI, so that the terminal can effectively determine the actual number when it receives TPMI, so as to accurately send PTRS.

[0065] In conjunction with the embodiments of the first aspect, in some embodiments, when the transport layer number of PUSCH is indicated as 1 in the DCI, the terminal determines that the actual number of PTRS ports is 1, and the PTRS port is associated with an allocated DMRS port.

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

[0067] In the above embodiments, 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 conjunction with the embodiments of the first aspect, in some embodiments, when the number of transport 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 embodiments, when the information indication field occupies a certain number of bits, the terminal can 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 ports for PTRS is 1, and the actual number of PTRS ports is 1.

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

[0074] In conjunction with the embodiments of the first aspect, in some embodiments, the value is set to 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.

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

[0076] In conjunction with the embodiments of the first aspect, in some embodiments, when the PUSCH has 2 transport layers, the bit width of the information indication field is 1, and the 1-bit code point in the information indication field indicates the DMRS port corresponding to the PTRS port; or,

[0077] When the PUSCH has 3 transport layers, the bit width of the information indication field is 2. The 2-bit code point in the information indication field indicates the DMRS port corresponding to the PTRS port.

[0078] In the above embodiments, 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 under different transmission layer conditions.

[0079] In conjunction 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 embodiments, the terminal can conveniently determine the DMRS port 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 conjunction 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 transport layers of PUSCH is 2.

[0082] In the above embodiments, for two actual PTRS ports, the information indication field can indicate the DMRS port associated with one of the PTRS ports, implicitly determining the DMRS port associated with the other PTRS port.

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

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

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

[0086] In conjunction 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 embodiments, the terminal determines the associated DMRS port based on the mapping relationship, which helps to improve mapping efficiency.

[0088] In conjunction 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 the DMRS port associated with a PTRS port; wherein, the maximum number of PTRS ports is 2, and the number of transport layers of PUSCH is 2.

[0089] In the above embodiments, when the actual number is 1, the information indication field can indicate only the DMRS port associated with the actual PTRS port.

[0090] In conjunction 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 by different code points of the information indication field.

[0091] In the above embodiments, the flexibility of information indication field indication can be improved based on the effective indication of associated DMRS ports.

[0092] In conjunction 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 SRS port packet or PUSCH port packet associated with any PTRS port, and the DMRS port in the corresponding DMRS port packet is determined based on the SRS port packet or PUSCH port packet; 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. 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 number of transport layers for PUSCH is 3.

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

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

[0098] In the above embodiments, 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 conjunction with the embodiments of the first aspect, in some embodiments, the bit width of the information indication field is 4, 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 embodiments, the most significant bit (MSB) and least significant bit (LSB) of the information indication field indicate the DMRS port associated with different PTRS ports.

[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 first part uses different code points to indicate the DMRS port associated with the first PTRS port, and the second part uses different code points to indicate the DMRS port associated with the second PTRS port among the remaining DMRS ports.

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

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

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

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

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

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

[0109] The DCI indicates a transport layer number of 2, and the maximum number of ports for PTRS is 2.

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

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

[0112] The DCI indicates a transport layer number of 3, and the maximum number of ports for PTRS is 2.

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

[0114] Secondly, embodiments of this disclosure provide a PTRS transmission method, the method comprising:

[0115] The network device sends configuration information to the terminal, which includes the maximum number of PTRS ports for the terminal in non-coherent transmission. The terminal is a terminal with 3 transmit antennas.

[0116] The network device sends a 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 conjunction with the embodiments of the second aspect, in some embodiments, 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.

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

[0119] In conjunction with the embodiments of the second aspect, in some embodiments, the grouping method 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 TPMI and SRS port grouping; or,

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

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

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

[0124] TPMI is carried within DCI.

[0125] In conjunction with the embodiments of the second aspect, in some embodiments, when the number of transport 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 packets or the number of PUSCH port packets that actually correspond to different data layers of TPMI.

[0126] In conjunction with the embodiments of the second aspect, in some embodiments, all data layers of TPMI are transmitted through one SRS port packet or PUSCH port packet, and the actual number of PTRS ports is 1; or,

[0127] All data layers of TPMI are transmitted via packets from two SRS ports or PUSCH ports, with the actual number of PTRS ports being two.

[0128] In conjunction with the embodiments of the second aspect, in some embodiments, when the transport layer number of PUSCH is indicated as 1 in the DCI, the actual number of PTRS ports is 1, and the PTRS port is associated with an allocated DMRS port.

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

[0130] In conjunction with the embodiments of the second aspect, in some embodiments, when the number of transport 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 ports for PTRS is 1, and the actual number of PTRS ports is 1.

[0134] In conjunction with the embodiments of the second aspect, in some embodiments, the value is set to 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 conjunction with the embodiments of the second aspect, in some embodiments, when the PUSCH has a transport layer number of 2, the bit width of the information indication field is 1, and the DMRS port corresponding to the PTRS port is indicated by the 1-bit code point in the information indication field; or,

[0136] When the PUSCH has 3 transport layers, the bit width of the information indication field is 2. The 2-bit code point in the information indication field indicates the DMRS port corresponding to the PTRS port.

[0137] In conjunction 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 conjunction 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 transport layers of PUSCH is 2.

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

[0140] In conjunction 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 conjunction 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 conjunction 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 transport layers of PUSCH is 2.

[0143] In conjunction 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 by different code points of the information indication field.

[0144] In conjunction 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 SRS port packet or PUSCH port packet associated with any PTRS port, and the DMRS port in the corresponding DMRS port packet is determined based on the SRS port packet or PUSCH port packet; 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. 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 number of transport layers for PUSCH is 3.

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

[0149] In conjunction with the embodiments of the second aspect, in some embodiments, the bit width of the information indication field is 4, 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 first part uses different code points to indicate the DMRS port associated with the first PTRS port, and the second part uses different code points to indicate the DMRS port associated with the second PTRS port among the remaining DMRS ports.

[0152] In conjunction with the embodiments of the second aspect, in some embodiments, the PTRS port is associated with a configured DMRS port, which is predefined by the protocol or configured by the network device through signaling; wherein, the DCI does not contain an information indication field for indicating the association 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 as the first assigned DMRS port in the DMRS port group associated with the PTRS port;

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

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

[0156] The DCI indicates a transport layer number of 2, and the maximum number of ports for PTRS is 2.

[0157] In conjunction with the second aspect of the embodiments, in some embodiments, the actual number of PTRS ports is 2, and the 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 DCI indicates a transport layer number of 3, and the maximum number of ports for PTRS is 2.

[0159] Thirdly, embodiments of this disclosure provide a terminal, including:

[0160] The transceiver module is used to receive configuration information sent by network devices. The configuration information includes the maximum number of PTRS ports for the terminal in non-coherent transmission. The terminal is a terminal with 3 transmit antennas.

[0161] The transceiver module is also used to receive downlink control information (DCI) sent by network devices;

[0162] The processing module is used to determine the demodulation reference signal DMRS port associated with the PTRS port when the Physical Uplink Shared Channel (PUSCH) is scheduled, based on the DCI.

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

[0164] Fourthly, embodiments of this disclosure provide a network device, including:

[0165] The transceiver module is used to send configuration information to the terminal. The configuration information includes the maximum number of PTRS ports for the terminal in non-coherent transmission. The terminal is a terminal with 3 transmit antennas.

[0166] The transceiver module is also used to send DCI to the terminal. 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.

[0167] Fifthly, embodiments of this disclosure provide a communication device, including:

[0168] One or more processors;

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

[0170] Sixthly, embodiments of this disclosure provide 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 second aspect of the method.

[0173] In a seventh aspect, embodiments of this disclosure provide a storage medium storing instructions, wherein...

[0174] When the instruction is executed on the communication device, it causes the communication device to perform the method as described in the first aspect or the second aspect.

[0175] Eighthly, embodiments of this disclosure provide a program product that, when executed by a communication device, causes the communication device to perform the method as described in the optional implementations of the first and second aspects.

[0176] In a ninth aspect, embodiments of this disclosure provide a computer program that, when run on a computer, causes the computer to perform the methods described in alternative implementations of the first and second aspects.

[0177] In a tenth aspect, embodiments of this disclosure provide a chip or chip system. The chip or chip system includes processing circuitry configured to perform the methods described according to optional implementations of the first and second aspects above.

[0178] It is understood that the aforementioned terminals, network devices, communication systems, storage media, program products, computer programs, chips, or chip systems are all used to execute the methods proposed in the embodiments of this disclosure. Therefore, the beneficial effects they can achieve can be referred to the beneficial effects in the corresponding methods, and will not be repeated here.

[0179] This disclosure is not exhaustive, but merely illustrative of some embodiments, and is not intended to limit the scope of protection of this disclosure. Unless otherwise specified, each step in a particular 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 particular embodiment can also be implemented as an independent embodiment, and the order of the steps in a particular embodiment can be arbitrarily interchanged. Furthermore, the optional implementation methods in a particular embodiment can be arbitrarily combined; moreover, the embodiments can be arbitrarily combined, for example, some or all steps of different embodiments can be arbitrarily combined, and a particular embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0180] In each of the disclosed embodiments, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions of the embodiments are consistent and can be referenced by each other. Technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0181] The terminology used in the embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to limit the scope of this disclosure.

[0182] In this embodiment of the disclosure, unless otherwise stated, elements expressed in the singular form, such as "a," "an," "the," "the," "the," "the," "the," "the," "this," etc., can mean "one and only one," or "one or more," "at least one," etc. For example, when using articles such as "a," "an," "the," etc. in translation, the noun following the article can be understood as either a singular expression or a plural expression.

[0183] In the embodiments disclosed herein, "multiple" refers to two or more.

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

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

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

[0187] The prefixes "first," "second," etc., used in the embodiments of this disclosure are merely for distinguishing different descriptive objects and do not impose restrictions on the position, order, priority, quantity, or content of the descriptive objects. The description of the descriptive objects is found in the claims or the context of the embodiments, and the use of prefixes should not constitute unnecessary restrictions. For example, if the descriptive object is a "field," the ordinal numbers preceding "field" in "first field" and "second field" do not restrict the position or order of the "fields." "First" and "second" do not restrict whether the "fields" they modify are in the same message, nor do they restrict the order of "first field" and "second field." Similarly, if the descriptive object is a "level," the ordinal numbers preceding "level" in "first level" and "second level" do not restrict the priority between "levels." Furthermore, the number of descriptive objects is not limited by ordinal numbers and can be one or more. For example, in "first device," the number of "devices" can be one or more. Furthermore, the objects modified by different prefixes can be the same or different. For example, if the object being described is "device", then "first device" and "second device" can be the same device or different devices, and their types can be the same or different. Similarly, if the object being described is "information", then "first information" and "second information" can be the same information or different information, and their content can be the same or different.

[0188] In some embodiments, “including A,” “containing A,” “for indicating A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0189] In some embodiments, the terms “in response to…”, “in response to determining…”, “in the case of…”, “when…”, “if…”, “if…”, etc., can be used interchangeably.

[0190] In some embodiments, the terms “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 lower than,” and “above” can be used interchangeably, as can the terms “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”.

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

[0192] In some embodiments, "network" can be interpreted as devices included in the network, such as access network devices, core network devices, 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," or "fixed station." In some embodiments, it may also be understood as "node," "access point," "transmission point (TP)," "reception point (RP)," "transmission / 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," or "bandwidth part (BWP)."

[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, the acquisition of data, information, etc., may comply with the laws and regulations of the country where the location is situated.

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

[0197] Furthermore, each element, each row, or each column in the table of this disclosure can be implemented as an independent embodiment, and any combination of any element, any row, or any column can also be implemented as an independent embodiment.

[0198] Figure 1a is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure.

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

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

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

[0202] In some embodiments, the access network device is, for example, a node or device that connects a terminal to a wireless network. The access network device may include, but is not limited to, at least one of the following in a 5G communication system: evolved Node B (eNB), next-generation eNB (ng-eNB), next-generation Node B (gNB), node B (NB), home node B (HNB), home evolved node B (HeNB), wireless backhaul device, radio network controller (RNC), base station controller (BSC), base transceiver station (BTS), base band unit (BBU), mobile switching center, base station in a 6G communication system, open RAN, cloud RAN, base station in other communication systems, and access node in a wireless fidelity (WiFi) system.

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

[0204] In some embodiments, the access network device may be composed of a central unit (CU) and a distributed unit (DU). The CU may also be called a control unit. The CU-DU structure can separate the protocol layer of the access network device. Some of the protocol layer functions are centrally controlled by the CU, while the remaining part or all of the protocol layer functions are distributed in the DU and centrally controlled by the CU. However, this is not the only possibility.

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

[0206] It is understood that the communication system described in this disclosure is for the purpose of more clearly illustrating the technical solutions of this disclosure, and does not constitute a limitation on the technical solutions provided in this disclosure. As those skilled in the art will know, with the evolution of system architecture and the emergence of new business scenarios, the technical solutions provided in this disclosure are also applicable to similar technical problems.

[0207] The following embodiments of this disclosure can be applied to the communication system 100 shown in FIG1a, or to a part thereof, but are not limited thereto.

[0208] The entities shown in Figure 1a are illustrative. The communication system may include all or some of the entities in Figure 1a, or it may include other entities besides those in Figure 1a. The number and form of each entity are arbitrary. The connection relationship between the entities is illustrative. The entities may not be connected to each other or may be connected in any way. The connection may be direct or indirect, wired or wireless.

[0209] The embodiments disclosed herein 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), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), and IEEE 802.20, Ultra-Wideband (UWB), Bluetooth (a 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, systems utilizing other communication processing methods, and next-generation systems built upon them, etc. Furthermore, multiple systems can be combined (e.g., a combination of LTE or LTE-A with 5G).

[0210] To improve coverage at cell edges and provide a more balanced quality of service within the service area, Transmission Reception Point (TRP) cooperation, or simply multi-point cooperation, remains an important technique in NR systems. From a network architecture perspective, deploying the network with a large number of distributed access points and centralized baseband processing is more conducive to providing a balanced user experience rate and significantly reduces latency and signaling overhead caused by handover. As frequency bands increase, a relatively denser deployment of access points is also required to ensure network coverage. At higher frequency bands, with the increasing integration of active antenna devices, there is a greater tendency to adopt modular active antenna arrays.

[0211] In some embodiments, the antenna array of each TRP can be divided into several relatively independent antenna panels, so the overall array shape and number of ports can be flexibly adjusted according to the deployment scenario and service requirements. Antenna panels or TRPs can also be connected by optical fibers for more flexible distributed deployment. In the millimeter-wave band, as the wavelength decreases, the obstruction effect caused by obstacles such as people or vehicles becomes more significant. In this case, from the perspective of ensuring link robustness, the cooperation between multiple TRPs or panels can be utilized to transmit or receive from multiple beams at multiple angles, thereby reducing the adverse effects of obstruction.

[0212] In some embodiments, based on the mapping relationship between the transmitted signal streams and multiple TRPs or panels, multi-point cooperative transmission technology can be divided into two types: 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 mapped to only a portion of the TRPs or panels. Coherent transmission places higher demands on the synchronization between transmission points and the transmission capacity of the backhaul link, thus being more sensitive to many non-ideal factors in real-world deployment conditions. In contrast, incoherent transmission is less affected by these factors.

[0213] In some embodiments, simultaneous transmission enhancements based on multiple TRPs (MTRPs) are considered for PUSCH or Physical Uplink Control Channel (PUCCH).

[0214] For PUSCH or Physical Downlink Shared Channel (PDSCH), the data layer for data transmission corresponds to DMRS. The DMRS design for 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 occurrence of the DMRS should be as close as possible to the start of the scheduling. The use of front-load DMRS helps the receiver quickly estimate the channel and perform reception detection, playing a crucial role in reducing latency and supporting self-contained structures. Depending on the total number of orthogonal DMRS ports, front-load DMRS can occupy a maximum of 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 lower overhead. However, NR systems consider mobility speeds up to 500 km / h. Faced with such a large dynamic range of mobility, in addition to front-load DMRS, more DMRS symbols need to be inserted during the scheduling duration in medium- or high-speed scenarios to meet the estimation accuracy for time-varying channel characteristics. To address this issue, NR systems employ a DMRS structure combining front-load DMRS with additional DMRS whose time-domain density is configurable. Each additional DMRS pattern is a repetition of the front-load DMRS.

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

[0218] In some embodiments, the front-load DMRS patterns for the two configuration types are shown 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 a maximum of two OFDM symbols. Considering power utilization efficiency, when using two-symbol front-load DMRS, time-domain orthogonal overlay codes (TD-OCC) are used in the time domain in addition to frequency-domain circuit switching (CS) or OCC.

[0220] In some embodiments, consistent with 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 DMRSs depends on the higher-level parameter configuration and the specific schedule duration.

[0221] In some embodiments, Tables 1-1 to 1-16 illustrate the DMRS port allocation with different parameter configurations under Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM) waveforms. Taking Table 1-1 as an example, Table 1-1 corresponds to the mapping relationship of DMRS ports when DMRS type 1 (dmrs-Type = 1), single symbol (maxLength = 1), and single stream transmission (rank = 1). The meanings of the parameters in Tables 1-2 to 1-16 below can be found in Table 1-1 and will not be repeated here.

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

[0223] CDM stands for Code Division Multiplexing.

[0224] Table 1-2 Antenna Ports: Conversion precoding is disabled, dmrs-Type=1, maxLength=1, rank=2

[0225] Table 1-3 Antenna Ports: Conversion precoding is disabled, dmrs-Type=1, maxLength=1, rank=3

[0226] Table 1-4 Antenna Ports: Conversion precoding is disabled, dmrs-Type=1, maxLength=1, rank=4

[0227] Table 1-5 Antenna Ports: Conversion precoding is disabled, dmrs-Type=1, maxLength=2, rank=1

[0228] Table 1-6 Antenna Ports, Conversion Precoding is Disabled, dmrs-Type=1, maxLength=2, rank=2

[0229] Table 1-7 Antenna Ports, Conversion Precoding is Disabled, dmrs-Type=1, maxLength=2, rank=3

[0230] Table 1-8 Antenna Ports, Conversion Precoding is Disabled, dmrs-Type=1, maxLength=2, rank=4

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

[0232] Table 1-10 Antenna Ports, 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 is Disabled, dmrs-Type=2, maxLength=1, rank=4

[0235] Table 1-13 Antenna Ports, Conversion Precoding Disabled, dmrs-Type=2, maxLength=2, rank=1

[0236] Table 1-14 Antenna Ports, Conversion Precoding Disabled, dmrs-Type=2, maxLength=2, rank=2

[0237] Table 1-15 Antenna Ports, Conversion Precoding Disabled, dmrs-Type=2, maxLength=2, rank=3

[0238] Table 1-16 Antenna Ports, Conversion Precoding Disabled, dmrs-Type=2, maxLength=2, rank=4

[0239] In some embodiments of this disclosure, the PN is caused by the execution of the local oscillator (LoU), which disrupts the orthogonality of the subcarriers in the OFDM system. This causes the CPE to rotate the modulation constellation at a fixed angle and causes inter-carrier interference (ICI), resulting in scattering of constellation points, which is more pronounced at high frequencies. Since the impact of CPE is greater, compensation for CPE is primarily considered in NR. PTRS is used for CPE estimation.

[0240] The NR system supports 1-port, 2-port, 4-port, and 8-port PUSCH. Terminals using this technology are equipped with only 1 or 2 Tx antennas and support partial and non-coherent (PC) transmission and NC.

[0241] In some embodiments, to enhance UL performance, terminals with higher transmission capabilities are required, such as terminal 101 equipped with three Tx antennas in this embodiment. For the enhanced terminal 101 with higher transmission capabilities, which supports a maximum of three data layers, PTRS transmission needs to be enhanced. Specifically, the terminal 101 with three Tx antennas uses NC transmission, requiring consideration of the DMRS port grouping method in PC transmission, and necessitating a reconsideration of the PTRS transmission method and the indication method for the PTRS association indication field in DCI.

[0242] This disclosure provides a method for determining the associated DMRS port and sending PTRS.

[0243] Figure 2a is an interactive schematic diagram of a phase tracking reference signal (PTRS) transmission method according to an embodiment of the present disclosure. As shown in Figure 2a, this disclosure relates to a PTRS transmission method, which includes:

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

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

[0246] It is worth noting that the term "port" used in the embodiments of this disclosure can also be "antenna port," for example, a PTRS port can also be a PTRS antenna port, a DMRS port can also be a DMRS antenna port, etc. For the sake of simplicity, the term "port" is used in all embodiments of this disclosure.

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

[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 higher-level parameter PTRS-UplinkConfig to 'n1' or 'n2', where 'n1' corresponds to a maximum number of ports being configured as 1, and 'n2' corresponds to a maximum number of ports being configured as 2.

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

[0250] Optionally, the number of ports of the PTRS 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 is associated with DMRS; for example, both use the same precoding and have port association, orthogonal sequence generation, or quasi-co-location (QCL) relationship, etc.

[0252] Optionally, network device 102 can control terminal 101 to transmit PTRS uplink through the configuration of higher-level parameters.

[0253] In one example, the configuration information may include DMRS configuration (DMRS-UplinkConfig). See the following DMRS configuration IE. If phaseTrackingRS is not configured in the higher-layer parameter DMRS-UplinkConfig, then terminal 101 will not transmit PTRS uplink.

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

[0255] In some embodiments, the terminal 101 in this disclosure 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 four receive antennas (Rx), six Rx, or eight Rx. For example, Figure 2b shows the terminal RF architecture with 3Tx and 4Rx (3T4R); Figure 2c shows the terminal RF architecture with 3Tx and 6Rx (3T6R); and Figures 2d to 2e show the terminal RF architecture with 3Tx and 8Rx (3T8R).

[0256] In step S2102, network device 102 sends DCI to terminal 101.

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

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

[0259] In one example, the DCI includes an information indication field that indicates the association between the PTRS port and the DMRS port. Therefore, this information indication field can also be called a PTRS-DMRS association indication field.

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

[0261] Optionally, 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.

[0262] The order can be ascending or descending. The index of different DMRS ports in the DMRS port group is a sequence 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 for DMRS port groups is the same as that for SRS port groups or PUSCH port groups. The name of the DMRS port group can also be replaced with "DMRS Port Group" (this name is for illustrative purposes only and indicates a group of DMRS ports); the name of the SRS port group can also be replaced with "SRS Port Group" (this name is for illustrative purposes only and indicates a group of SRS ports); and the name of the PUSCH port group can also be replaced with "PUSCH Port Group" (this name is for illustrative purposes only and indicates a group of PUSCH ports).

[0264] The SRS port group or PUSCH port group can include the following methods:

[0265] Similar to the conventional method, for example, for three ports 0, 1, and 2, ports {0, 2} are grouped together, and {1} is grouped together; or,

[0266] Alternatively, grouping can be done in other ways, such as grouping {0, 1} into one group and {2} into another group; or grouping {0} into one group and {1, 2} into another group.

[0267] Alternatively, the grouping method can be predefined by the protocol or configured by the network device.

[0268] Among them, there is an association or correspondence between the DMRS port group and the SRS port group or PUSCH port group, which can determine the DMRS port group corresponding to the SRS port group or PUSCH port group.

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

[0270] In another example, the DCI may include the transmission rank or the transmission rank indication (TRI; or rank indication, RI) to indicate the number of data 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, 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 PTRS, terminal 101 needs to determine the actual number so that it can send PTRS according to the DMRS port associated with the actual PTRS port.

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

[0276] In one example, terminal 101 determines the actual number of PTRS ports based on TPMI and SRS port groups or PUSCH port groups.

[0277] Optionally, TPMI is carried in DCI.

[0278] For PC and NC uplink transmissions in codebook-based uplink PUSCH transmission, if the Sounding Reference Signal Resource Indicator (SRI) selects or the RRC configures an SRS resource, and different SRS ports in this SRS resource come from panels using different crystal oscillators, then two PTRS ports are required. When the 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] In the TPMI matrix, rows correspond to the number of ports, and columns correspond to the data layers. The number of data layers or layers can be indicated by the transport layer rank (TRI) or by the transport layer rank indicator (RI). Taking SRS port groups as an example, SRS ports 0, 1, and 2 are divided into two groups, {0,1} and {2}, respectively. SRS port group {0,1} shares PTRS port 0, and 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 here the SRS port can also be equivalent to the PUSCH port.

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

[0281] In one alternative example, when rank = 1, TPMI corresponds to a 3x1 matrix, the matrix form of which can be found in any of the following forms: In the three matrix forms with Rank=1, the actual data layer being transmitted is 1, and one PTRS port needs to be scheduled, meaning the actual number of PTRS ports is 1.

[0282] Optionally, when the number of transport layers of PUSCH 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 packets or PUSCH port packets that actually correspond to different data layers of TPMI.

[0283] In conjunction with the description of the foregoing embodiments, the transport layer number (rank) can be indicated by DCI, and the rank value can indicate the number of data layers or the number of layers. rank > 1, for example, could be rank = 2 or 3. Optionally, when the transport layer number of PUSCH is greater than 1 and the maximum number of ports is 2, the actual number of SRS port packets or PUSCH port packets corresponding to different data layers of TPMI is different, and the actual number of PTRS ports determined by terminal 101 is different. For example, if all data layers of TPMI are transmitted through 1 SRS port packet or PUSCH port packet, the actual number of PTRS ports is 1. As another example, if all data layers of TPMI are transmitted through 2 SRS port packets or PUSCH port packets, the actual number of PTRS ports is 2. The aforementioned SRS port packets or PUSCH port packets can also be replaced with DMRS port packets.

[0284] In one alternative example, when rank = 2, TPMI corresponds to a 3x2 matrix, the matrix form of which can be found in any of the following forms: Of the three matrix forms with Rank=2, For SRS port 0 and SRS port 1, there is one SRS port group involved, therefore the actual number of ports in PTRS 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 ports for PTRS is 2.

[0285] In another alternative example, when rank = 3, TPMI corresponds to a 3x3 matrix, 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. This involves two SRS port packets, meaning that the three data layers of TPMI are transmitted through two SRS port packets. Therefore, the actual number of PTRS packets is 2.

[0286] In another example, the actual number of PTRS ports is predefined or default; or, the actual number of PTRS ports is determined based on configuration information.

[0287] In this example, terminal 101 can 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, terminal 101 determines the DMRS port associated with the PTRS port when the PUSCH is scheduled, based on the DCI.

[0289] Optionally, in conjunction 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 specific DMRS port in the DMRS port group that is associated with the PTRS port. For the sake of brevity, 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, therefore it is necessary to determine the DMRS port associated with the actual PTRS port. The actual number of PTRS ports may be the same as or different from the configured maximum number of ports. Optionally, terminal 101 may 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 transport layers for PUSCH is indicated as 1 in the DCI, the terminal determines that the actual number of PTRS ports is 1, and the PTRS ports are associated with an allocated DMRS port; wherein the maximum number of ports is 1 or 2, and the DCI contains an information indication field with a bit width of 0, which is used to indicate the association between the PTRS ports and the DMRS ports.

[0292] Optionally, the assigned DMRS port can be determined based on the DMRS port group it belongs to. For example, a DMRS port in one of the DMRS port groups can be determined based on TPMI, network configuration, or a default method. The TPMI method can be found in the description of the foregoing embodiments.

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

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

[0295] Alternatively, if the maximum number of ports is 2 and rank = 1, then terminal 101 can still determine that the actual number is 1, and the actual PTRS port is associated with an assigned DMRS port.

[0296] In this example, the bit width of the information indicator field can be 0, or the indicator field can be omitted to save bit overhead in DCI.

[0297] In the example of the second aspect, when the number of transport 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 can 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, setting the value to 2 allows the DMRS port corresponding to a PTRS port when the number of transmission layers is greater than 1 to be indicated by different 2-bit code points in the information indication field. This means that when rank > 1, 2 bits can be used uniformly for indication. Specifically, when the actual number of PTRS ports is 1, the code points in the information indication field have a mapping relationship with the DMRS ports, as shown in Table 2-1 below:

[0301] Table 2-1

[0302] For 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 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 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 indicator can be used. The code point of the information indicator field has a mapping relationship with the DMRS port, as shown 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 indicator can be used, where the code point of the information indicator field has a mapping relationship with the DMRS port, as shown 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 transport layers is 2.

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

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

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

[0310] In conjunction with the description of the foregoing embodiments, a predefined PTRS port can be, for example, the first PTRS port or PTRS port 0. For instance, when the actual number of PTRS ports is 2 and rank = 2, the code points of the information indication field have a mapping relationship with the DMRS ports; referring to the mapping forms in Table 2-3 below, the DMRS port associated with PTRS port 0 is determined based on different code points:

[0311] Table 2-3

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

[0313] In conjunction with the description of the foregoing embodiments, a predefined PTRS port can be, for example, the first PTRS port or PTRS port 0. For instance, when the actual number of PTRS ports is 2 and rank = 2, the code points of the information indication field have a mapping relationship with the DMRS ports; referring to the mapping form in 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 alternative examples, the DMRS port associated with PTRS port 0 is indicated by the most significant bit (MSB) of the 2 bits, and the DMRS port associated with PTRS port 1 is indicated by the least significant 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 the DMRS port associated with a PTRS port; where the maximum number of ports is 2, and the number of transport 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 by different code points in 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 as PTRS port 0 and PTRS port 1 as an example, either PTRS port can be either PTRS port 0 or 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 can be indirectly determined, and thus the DMRS port associated in the associated DMRS port group can be determined.

[0322] For example, taking SRS ports 0, 1, and 23 as examples, the grouping format of SRS ports 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 one group and 2 is another group.

[0323] Optionally, the bit width of the information indication field is 1 or 2, and different code points in the information indication field 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 can be PTRS port 0, and the second PTRS port can be PTRS port 1.

[0325] When indicated by a 1-bit code, the 1-bit code can be used to indicate a port in the SRS port packet or PUSCH packet associated with the first PTRS port. When indicated by a 2-bit code, the 2-bit code can be used to indicate a port in the SRS port packet or PUSCH packet 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. The high 2 bits (MSB) of the information indication field indicate the DMRS port associated with the first PTRS port, and the low 2 bits (LSB) indicate the DMRS port associated with the second PTRS port.

[0329] The first PTRS port can be PTRS port 0, and the second PTRS port can 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. 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 2 bits (MSB) of the information indication field, and the second part includes the low 1 bit (LSB) of the information indication field; the different code points of the first part indicate the DMRS port associated with the first PTRS port, and the different code points of the second part indicate the DMRS port associated with the second PTRS port among the remaining DMRS ports.

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

[0333] In this example, the DCI does not contain 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 the DCI indication method, but by default through the protocol definition or network configuration.

[0334] Optionally, the DMRS port is set to the first assigned DMRS port in the DMRS port group associated with the PTRS port; wherein the number of transport layers indicated by 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 permanently associated with the designated 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 permanently associated with the designated DMRS port.

[0336] Optionally, the actual number of PTRS ports is 2, one PTRS port is associated with the first allocated DMRS port in the corresponding DMRS port group, and the other PTRS port is associated with the second allocated DMRS port in the corresponding DMRS port group; wherein, the number of transport 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 assigned DMRS port by default, and PTRS port 1 is associated with the second assigned DMRS port by default.

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

[0340] In step S2105, terminal 101 sends PTRS according to the DMRS port associated with the PTRS port.

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

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

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

[0344] In some embodiments, for a PUSCH transmission configured with repetition, terminal 101 may use a PTRS cycling scheme to 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 that is repeatedly transmitted, the DMRS port associated with the PTRS port in the first TO can be determined based on the different implementations in step S2104. The PTRS loop is then used to determine the DMRS port associated with the PTRS port in other TOs.

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

[0347] For example, if the DMRS port group is {0, 1, 2}, and the DMRS port associated with the PTRS port in the first TO is DMRS port 0, then PTRS is sent on DMRS port 0 in that first TO. Starting from the default position DMRS port 1, based on the PTRS cycle, in the second TO, the DMRS port associated with the PTRS port is DMRS port 1, and PTRS is sent on DMRS port 1 in that second TO; in the third TO, the DMRS port associated with the PTRS port is DMRS port 2, in the fourth TO, the DMRS port associated with the PTRS port is DMRS port 0, and so on. Refer to Table 2-6 below.

[0348] Table 2-6

[0349] In another example, when rank=3 and the maximum number of PTRS ports is 2, after confirming that the actual number of PTRS ports is 2, it is necessary to determine the DMRS ports associated with different PTRS ports in each TO, and perform PTRS looping based on the DMRS port groups associated with each PTRS port. In this case, the default position includes the default DMRS port corresponding to each PTRS port, such as the first DMRS port in the DMRS port group associated with each PTRS port, or configured via signaling. Alternatively, see the previous example.

[0350] For example, the DMRS port packet associated with PTRS port 0 is {0, 1}, and the DMRS port packet associated with PTRS port 1 is {2}. If the first TO determines that the DMRS port associated with PTRS port 0 is DMRS port 0, and the DMRS port associated with PTRS port 1 is DMRS port 2, then PTRS packets are sent at DMRS port 0 and DMRS port 2 respectively in the first TO. Assuming that the default position in {0, 1} is DMRS port 1, then PTRS packets are sent at DMRS port 1 and DMRS port 2 respectively in the second TO, and so on. Since there is only one DMRS port in the DMRS port packet associated with PTRS port 1, the DMRS port associated with PTRS port 1 in different TOs is always 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 the actual TO or the nominal TO in the following embodiments.

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

[0354] Referring to Figure 2f, Type A is slot-level PUSCH transmission, which is not suitable for situations with very low latency requirements and very high reliability requirements. A PUSCH is transmitted over K consecutive time slots, corresponding to K time trips. Transmission begins on the S-th symbol in the initial time slot, and each time trip lasts for L symbols. S+L cannot exceed the slot boundary. In the figure, 2repetitions represents two retransmissions, meaning the transmission is repeated twice.

[0355] Referring to Figures 2g to 2i, Type B supports a PUSCH repetition scheme based on mini-slots and allows PUSCH transmission across time slots to further reduce latency. In the time domain, a PUSCH begins transmission on the S-th symbol in the initial time slot, continuously sending K TOs, where K is the nominal repetition. Each TO occupies L symbols 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-segmented, corresponding to an actual repetition K'. In Figure 2g, K=2, L=4, S=4; in Figure 2h, K=4, L=4, S=4; and in Figure 2i, K=1, L=14, S=4.

[0356] Optionally, for the entire Type B transmission, time slot L*K represents the length of the time window for PUSCH transmission. DL symbols within the window will be discarded and not used for PUSCH transmission. Network device 102 can indicate whether a semi-static flexible symbol is a dynamic UL symbol or a dynamic DL symbol via Slot Format Indication (SFI). Therefore, a semi-static flexible symbol may be available or unavailable for PUSCH. If there are unavailable symbols, they need to be discarded, and transmission will then proceed on the remaining available symbols.

[0357] Optionally, the transmission parameters for Type A and Type B, such as valid S and L combinations, can be found in Table 2-8, and the definition of the Redundant version (RV) of PUSCH transmission can be found 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 (Nominal TO) corresponding to all nominal repetitions, 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 (Actual TO) corresponding to all actual repetitions, and the RV field of the DCI indicates the initial value of the RV sequence.

[0361] In this example, if it is a Type B repeated transmission, as described in the foregoing embodiments, the nominal TO may be divided into actual TOs. PTRS transmission can be performed separately according to the actual TOs. For example, once the actual number of PTRS ports is determined, each TO in all actual TOs of a single PUSCH scheduling corresponds to the number of PTRS ports for PTRS transmission.

[0362] For example, when an uplink line symbol conflict occurs in a nominal TO, the corresponding nominal TO is dropped in order to allow for higher priority channel or signal transmission, or when a DL symbol or flexible symbol is configured as a DL symbol. Referring to Figure 2j, of the four nominal TOs, three are actual TOs available for actual transmission; that is, the number of actual TOs is three, and the TOs transmitted in the second transmission are dropped.

[0363] To facilitate understanding of the PTRS transmission methods in different TOs under the above-mentioned repeated transmission scenario, an example is given based on Figure 2j: When rank = 3 and the maximum number of PTRS ports is 1 or 2, if 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 1 PTRS port is {0, 1, 2}. Based on the implementation method of step S2104, if 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 the second TO has conflicting symbols, the method for determining the DMRS ports associated with the PTRS ports in subsequent TOs can refer to PTRS cyclic mapping method 2. In this case, the second TO is discarded, and it is not necessary to determine its associated DMRS port. Alternatively, if the second TO contains conflicting symbols, the method for determining the DMRS port associated with the PTRS port in subsequent TOs can refer to PTRS cyclic mapping method 3. In this case, the second TO is not an actual TO and no actual transmission occurs. However, when cyclically determining the DMRS port associated with the PTRS port in the third TO within {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, regardless of whether the DMRS port associated with the second TO is retained, 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, if the actual number of PTRS ports is confirmed to be 2, then in the first TO, PTRS port 0 is associated with the DMRS port group {0, 1}, and the associated DMRS port is DMRS port 0; in the first TO, PTRS port 1 is associated with the DMRS port group {2}, and the associated DMRS port is DMRS port 2. If there are no conflicting symbols or no discarded TOs, the mapping method in Table 2-7 can still be used to determine the associated DMRS ports in other TOs.

[0366] In this example, if there is a conflict symbol in the second TO, the method to determine 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 by 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 DMRS port 2. PTRS transmission will not be performed in the second TO where there is a conflict.

[0367] Table 2-11

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

[0369] In some embodiments, the names of information, etc., are not limited to the names described in the embodiments. 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, “get,” “obtain,” “receive,” “transmit,” “bidirectional transmission,” and “send and / or receive” can be used interchangeably and can be interpreted as receiving from other entities, obtaining from protocols, obtaining from higher layers, obtaining through self-processing, or autonomous implementation, among other meanings.

[0371] In some embodiments, terms such as “send,” “transmit,” “report,” “distribute,” “transfer,” “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)”, and “RAN-based” can be used interchangeably.

[0373] In some embodiments, terms such as “moment,” “point in time,” “time,” and “time location” can be used interchangeably, as can terms such as “duration,” “segment,” “time window,” “window,” and “time.”

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

[0375] In some embodiments, terms such as "certain," "preset," "default," "set," "indicated," "a certain," "any," and "first" can be used interchangeably. "Certain A," "preset A," "default A," "set A," "indicated A," "a certain A," "any A," and "first A" can be interpreted as A pre-defined in a protocol or the like, or as A obtained through setting, configuration, or instruction, or as specific A, a certain A, any A, or first A, but are not limited thereto.

[0376] In some embodiments, the determination or judgment can be made by a value represented by 1 bit (0 or 1), or by a true or false value (boolean), or by a comparison of numerical values ​​(e.g., a 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 receiver to respond to the sent content.

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

[0379] In some embodiments, other alternative implementations may be described before or after the specification corresponding to FIG2a.

[0380] Figure 3 is a schematic diagram illustrating a phase tracking reference signal (PTRS) transmission method according to an embodiment of the present disclosure. As shown in Figure 3, this embodiment of the present disclosure relates to a PTRS transmission method, which is executed by a terminal 101, and the method includes:

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

[0382] Optionally, the implementation of step S3101 can be found in the implementation of step S2101, and will not be repeated here.

[0383] Optionally, the configuration information includes the maximum number of PTRS ports for the terminal in noncoherent transmission, and the terminal is a terminal with 3 transmit antennas.

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

[0385] Optionally, the implementation of step S3102 can be found in the implementation of steps S2102 to S2104, and 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 can be found in the implementation of step S2105, and will not be repeated here.

[0388] Optionally, the PTRS port uses the same precoding as the DMRS port.

[0389] In some embodiments, other optional implementations may be described before or after the specification corresponding to FIG3.

[0390] Figure 4 is a schematic diagram illustrating a phase tracking reference signal (PTRS) transmission method according to an embodiment of the present disclosure. As shown in Figure 4, this embodiment of the present disclosure relates to a PTRS transmission method, which is executed by a network device 102, and the method includes:

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

[0392] Optionally, the implementation of step S3101 can be found in the implementation of step S2101, and will not be repeated here.

[0393] Optionally, the configuration information includes the maximum number of PTRS ports for the terminal in noncoherent transmission, and the terminal is a terminal with 3 transmit antennas.

[0394] Step S4102: Send DCI to terminal 101.

[0395] Optionally, the implementation of step S3101 can be found in the implementation of step S2102, and will not be repeated here.

[0396] Optionally, 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 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, other optional implementations may be described before or after the specification corresponding to Figure 4.

[0398] The method of this disclosure is used to solve the uplink PTRS transmission scheme of 3Tx terminals. It enables 3Tx terminals to perform PTRS transmission under NC PUSCH transmission and defines the PTRS-DMRS association indication, thereby supporting codebook-based 3-port PUSCH transmission. Furthermore, the method of this embodiment is applicable to single-slot and multi-slot repeated PUSCH transmissions. To facilitate understanding of the embodiments of this disclosure, some examples are listed below:

[0399] Example 1:

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

[0401] Example 2:

[0402] Based on Example 1, if the terminal reports a maximum supported PTRS port count of 1, then the following can be used:

[0403] Option 1: Indication associated via PTRS-DMRS. Wherein,

[0404] This indicator field is not needed when RANK=1; if the number of bits is 0.

[0405] When RANK>1, the following two methods can be included:

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

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

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

[0409] Option 2: When RANK>1, the default association is used.

[0410] Do not use DCI indicators. For example, fix the association to the first DMRS port.

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

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

[0413] Configure the port for starting the loop via signaling.

[0414] Example 3:

[0415] Based on Example 1, if the maximum number of PTRS ports is configured to be 2, when RANK>1, the existing rules will be changed to adopt the default fixed number of PTRS ports.

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

[0417] When RANK=1, no indication is needed;

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

[0419] Case 1: Fixed PTRS port count is 2:

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

[0421] Alt.2: Use 2 bits uniformly for indicating the first PTRS port;

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

[0423] Case 2: Fixed PTRS port count is 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.

[0427] Case 2: Fixed PTRS port count is 1:

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

[0429] Alt.1: If the corresponding SRS port group 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] Port grouping is achieved either by reporting grouping information through the terminal or by predefined settings.

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

[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 are defined as MSB or LSB.

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

[0435] When RANK=2,

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

[0437] The default association is that 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 at 1.

[0439] The default association does not require specification; for example, it is always associated with the first DMRS port.

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

[0441] If the corresponding SRS port group is {{0,1},2},{0,{1,2}},{{0,2},1}, then it will be associated with the first DMRS port in the group by default.

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

[0443] The default DMRS port position corresponding to each PTRS port is used to cycle through the DMRS port group corresponding to each PTRS port, such as the first DMRS port.

[0444] This disclosure also provides an apparatus for implementing any of the above methods. For example, an apparatus is provided that includes units or modules for implementing the steps performed by the terminal in any of the above methods. Alternatively, another apparatus is provided that includes units or modules for implementing the steps performed by a network device (e.g., an access network device, a core network functional node, a core network device, etc.) in any of the above methods.

[0445] It should be understood that the division of units or modules in the above device is only a logical functional division. In actual implementation, they can be fully or partially integrated into a single physical entity, or they can be physically separated. Furthermore, the units or modules in the device can be implemented by a processor calling software: for example, the device includes a processor connected to a memory containing instructions. The processor calls the instructions stored in the memory to implement any of the above methods or to implement the functions of the units or modules in the above device. The processor can be, for example, a general-purpose processor, such as a Central Processing Unit (CPU) or a microprocessor, and the memory can be internal or external to the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits. The functionality of some or all of the units or modules can be achieved through the design of these hardware circuits, which can be understood as one or more processors. For example, in one implementation, the hardware circuit is an application-specific integrated circuit (ASIC). The functionality of some or all of the units or modules is achieved through the design of the logical relationships between the components within the circuit. In another implementation, the hardware circuit can be implemented using a programmable logic device (PLD). Taking a field-programmable gate array (FPGA) as an example, it can include a large number of logic gates. The connection relationships between the logic gates are configured through configuration files, thereby achieving the functionality of some or all of the units or modules. All units or modules of the above device can be implemented entirely through processor-called software, entirely through hardware circuits, or partially through processor-called software with the remaining parts implemented through hardware circuits.

[0446] In this embodiment, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction read and execute 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 relationships of hardware circuits. The logical relationships of the aforementioned hardware circuits are fixed or reconfigurable. For example, the processor is a hardware circuit implemented using 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 configuring the hardware circuit 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. Furthermore, 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), or a Deep Learning Processing Unit (DPU).

[0447] Figure 5a is a schematic diagram of the terminal structure proposed in an embodiment of this 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 includes the maximum number of PTRS ports for the terminal in non-coherent transmission. The terminal is a terminal with three transmit 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 transmit PTRS according to 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 used to perform at least one of the communication steps such as sending and / or receiving performed by the terminal 101 in any of the above methods, which will not be described in detail here. Optionally, the processing module 5102 is used to perform at least one of the other steps performed by the terminal 101 in any of the above methods, which will not be described in detail here.

[0449] Figure 5b is a schematic diagram of the terminal structure proposed in an embodiment of this disclosure. As shown in Figure 5b, the 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 of the terminal in noncoherent transmission, and the terminal is a terminal with 3 transmit antennas; the transceiver module 5201 is also used to send DCI to the terminal, the DCI being 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 transmit PTRS, and the PTRS port and the DMRS port use the same precoding.

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

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

[0452] In some embodiments, the processing module may be a single module or may include multiple sub-modules. Optionally, the multiple sub-modules may each perform all or part of the steps required by the processing module. Optionally, the processing module may be interchangeable with a processor.

[0453] Figure 6a is a schematic diagram of the structure of the communication device 6100 proposed in an embodiment of this disclosure. The communication device 6100 can be a network device (e.g., access network device, core network device, etc.), a terminal (e.g., user equipment, etc.), a chip, chip system, or processor that supports the network device in implementing any of the above methods, or a chip, chip system, or processor that supports the terminal in implementing any of the above methods. The communication device 6100 can be used to implement the methods described in the above method embodiments; for details, please refer to the descriptions in 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, such as a baseband processor or a central processing unit (CPU). The baseband processor can be used to process communication protocols and communication data, while the CPU can be used to control communication devices (e.g., base stations, baseband chips, terminal devices, terminal device chips, DUs or CUs, etc.), execute programs, and process program data. Optionally, the communication device 6100 can be used to execute any of the above methods. Optionally, one or more processors 6101 can be used to invoke instructions to cause the communication device 6100 to execute 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 method, and the processor 6101 performs at least one of the other steps. In optional embodiments, the transceiver may include a receiver and / or a transmitter, which may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, transceiver circuit, interface circuit, interface, etc., can be used interchangeably; the terms transmitter, transmitting unit, transmitter, transmitting circuit, etc., can be used interchangeably; and the terms receiver, receiving unit, receiver, receiving circuit, etc., can be used interchangeably.

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

[0457] The communication device 6100 described in the above embodiments may be a network device or a terminal, but the scope of the communication device 6100 described in this 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 a standalone device or a part of a larger device. For example, the communication device may be: (1) a standalone integrated circuit IC, or chip, or chip system or subsystem; (2) a collection of one or more ICs, optionally, the IC collection may also include storage components for storing data and programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, terminal device, smart terminal device, cellular phone, wireless device, handheld device, mobile unit, vehicle device, network device, cloud device, artificial intelligence device, etc.; (6) others, etc.

[0458] Figure 6b is a schematic diagram of the structure of chip 6200 according to an embodiment of this disclosure. For cases where the communication device 6100 can be a chip or a chip system, please refer to the schematic diagram of chip 6200 shown in Figure 6b, but it is not limited thereto.

[0459] Chip 6200 includes one or more processors 6201. Chip 6200 is used to perform any of the methods described above.

[0460] In some embodiments, chip 6200 further includes one or more interface circuits 6202. Optionally, terms such as interface circuit, interface, and transceiver pin can be used interchangeably. In some embodiments, chip 6200 further includes one or more memories 6203 for storing data. Optionally, all or part of the memories 6203 may be located outside chip 6200. Optionally, interface circuit 6202 is connected to memory 6203, and interface circuit 6202 can be used to receive data from memory 6203 or other devices, and interface circuit 6202 can be used to send data to memory 6203 or other devices. For example, interface circuit 6202 can 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 interaction 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 the various embodiments, such as virtual devices, physical devices, and chips, can be combined or separated arbitrarily as needed. Optionally, some or all steps can also be performed collaboratively by multiple modules and / or devices, which is not limited here.

[0463] This disclosure also proposes a storage medium storing instructions that, when executed on the communication device 6100, cause the communication device 6100 to perform 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 not limited thereto; it may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but not limited thereto; it may also be a temporary storage medium.

[0464] This disclosure also provides a program product that, when executed by the communication device 6100, causes the communication device 6100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0465] This disclosure also proposes a computer program that, when run on a computer, causes the computer to perform any of the above methods. Industrial applicability

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

Claims

1. A method for transmitting a phase tracking reference signal (PTRS), the method comprising: The terminal receives configuration information sent by the network device. The configuration information includes the maximum number of ports of the phase tracking reference signal PTRS in noncoherent transmission. The terminal is a terminal with 3 transmit antennas. 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. 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.

2. The method as described in 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 as described in claim 2, wherein, The grouping method of the DMRS port group is the same as that of the probe reference signal SRS port group or the physical uplink shared channel PUSCH port group.

4. The method of claim 3, wherein, The grouping method is either predefined by the protocol or configured by the network device.

5. The method of any one of claims 2 to 4, wherein, The method further includes: The terminal determines the actual number of PTRS ports based on the TPMI and SRS port groups indicated by the transmission precoding matrix, or based on the TPMI and PUSCH port groups; or... The actual number of PTRS ports is predefined or default; or, The actual number of PTRS ports is determined based on the configuration information; The TPMI is carried within the DCI.

6. The method of claim 5, wherein, When the number of transport 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 packets or PUSCH port packets that actually correspond to different data layers of TPMI.

7. The method of claim 6, wherein, All data layers of the TPMI are transmitted via packets from one SRS port or one PUSCH port, and the actual number of PTRS ports is one; or... All data layers of the TPMI are transmitted via two SRS ports or two PUSCH ports, with the actual number of PTRS ports being two.

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

9. The method according to any one of claims 1 to 7, wherein, When the DCI indicates that the number of transport layers of the PUSCH 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.

10. The method of 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; The maximum number of ports in the PTRS is 1, and the actual number of PTRS ports is 1.

11. The method of claim 10, wherein, The set value is 2, and the 2-bit code point in the information indication field indicates the DMRS port corresponding to the PTRS port when the number of transmission layers is greater than 1.

12. The method of claim 10, wherein, When the PUSCH has 2 transport layers, the bit width of the information indication field is 1, and the 1-bit code point in the information indication field indicates the DMRS port corresponding to the PTRS port; or, When the PUSCH has 3 transport layers, the bit width of the information indication field is 2. The 2-bit code point in the information indication field indicates the DMRS port corresponding to the PTRS port.

13. The method of claim 9, wherein, 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 transport layers of PUSCH is 2.

14. The method of claim 13, wherein, The bit width of the information indication field is 1. The 1-bit code point in the information indication field indicates the DMRS port associated with a predefined PTRS port in the corresponding DMRS port group.

15. The method of claim 13, wherein, The information indication field has a bit width of 2. Different code points in the 2 bits of the information indication field indicate a predefined DMRS port associated with a PTRS port.

16. The method of claim 9, wherein, 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 transport layers of PUSCH is 2.

17. The method of claim 16, 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 in the information indication field.

18. The method of claim 9, wherein, 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... The information indication field is used to indicate the DMRS port 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 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. The number of bits in the first part and the second part are different. The maximum number of ports for the PTRS is 2, and the number of transport layers for the PUSCH is 3.

19. The method of claim 18, wherein, The bit width of the information indication field is 1 or 2, and different code points in the information indication field 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.

20. The method of claim 18, wherein, The information indication field has a bit width of 4. The high-order 2 bits of the information indication field indicate the DMRS port associated with the first PTRS port, and the low-order 2 bits indicate the DMRS port associated with the second PTRS port.

21. The method of 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. The first part indicates the DMRS port associated with the first PTRS port through different code points, and the second part indicates the DMRS port associated with the second PTRS port among the remaining DMRS ports through different code points.

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

23. The method of claim 22, wherein, The DMRS port is set to the first assigned DMRS port in the DMRS port group associated with the PTRS port; Wherein, the number of transport 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 PTRS ports is 1.

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

25. The method of claim 22, wherein, The actual number of PTRS ports is 2, and the DMRS ports associated with the two PTRS ports are the first DMRS port in the DMRS port group corresponding to the SRS port group or PUSCH port group. The DCI indicates a transmission layer number of 3, and the PTRS has a maximum number of ports of 2.

26. A PTRS transmission method, the method comprising: The network device sends configuration information to the terminal, the configuration information including the maximum number of PTRS ports of the terminal in noncoherent transmission, the terminal being a terminal with 3 transmit antennas; The network device sends a DCI to the terminal, the DCI being 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 PTRS, and the PTRS port and the DMRS port use the same precoding.

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

29. The method of claim 28, wherein, The grouping method is either 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 PTRS ports is determined based on TPMI and SRS port grouping; or, The actual number of PTRS ports is determined based on TPMI and PUSCH port groupings; or, The actual number of PTRS ports is predefined or default; or, The actual number of PTRS ports is determined based on the configuration information; The TPMI is carried within the DCI.

31. The method of claim 30, wherein, When the number of transport 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 packets or PUSCH port packets that actually correspond to different data layers of TPMI.

32. The method of claim 31, wherein, All data layers of the TPMI are transmitted via packets from one SRS port or one PUSCH port, and the actual number of PTRS ports is one; or... All data layers of the TPMI are transmitted via two SRS ports or two PUSCH ports, with the actual number of PTRS ports being two.

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

35. The method of 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; The maximum number of ports in the PTRS is 1, and the actual number of PTRS ports is 1.

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

37. The method of claim 35, wherein, When the PUSCH has 2 transport layers, the bit width of the information indication field is 1, and the 1-bit code point in the information indication field indicates the DMRS port corresponding to the PTRS port; or, When the PUSCH has 3 transport layers, the bit width of the information indication field is 2. The 2-bit code point in the information indication field indicates the DMRS port corresponding to the PTRS port.

38. The method of claim 34, wherein, 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 transport layers of PUSCH is 2.

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

40. The method of claim 38, wherein, The information indication field has a bit width of 2. The 2-bit code point in the information indication field indicates the DMRS port associated with a predefined PTRS port.

41. The method of claim 34, wherein, 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 transport layers of PUSCH is 2.

42. The method of 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 in the information indication field.

43. The method of claim 34, wherein, 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... The information indication field is used to indicate the DMRS port 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 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. The number of bits in the first part and the second part are different. The maximum number of ports for the PTRS is 2, and the number of transport layers for the PUSCH is 3.

44. The method of claim 43, wherein, The bit width of the information indication field is 1 or 2, and different code points in the information indication field 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.

45. The method of claim 43, wherein, The information indication field has a bit width of 4. The high-order 2 bits of the information indication field indicate the DMRS port associated with the first PTRS port, and the low-order 2 bits indicate the DMRS port associated with the second PTRS port.

46. ​​The method of claim 43, 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. The first part indicates the DMRS port associated with the first PTRS port through different code points, and the second part indicates the DMRS port associated with the second PTRS port among the remaining DMRS ports through different code points.

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

48. The method of claim 47, wherein, The DMRS port is set to the first assigned DMRS port in the DMRS port group associated with the PTRS port; Wherein, the number of transport 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 of claim 47, wherein, The actual number of PTRS ports is 2. One PTRS port is associated with the first DMRS port allocated in the corresponding DMRS port group, and the other PTRS port is associated with the second DMRS port allocated in the corresponding DMRS port group. Wherein, the number of transport layers indicated by the DCI is 2, and the maximum number of ports of the PTRS is 2.

50. The method of claim 47, wherein, The actual number of PTRS ports is 2, and the DMRS ports associated with the two PTRS ports are the first DMRS port in the DMRS port group corresponding to the SRS port group or PUSCH port group. The DCI indicates a transport layer number of 3 and a maximum number of ports of 2.

51. A terminal, comprising: The transceiver module is used to receive configuration information sent by the network device. The configuration information includes the maximum number of PTRS ports of the terminal in non-coherent transmission. The terminal is a terminal with 3 transmit antennas. The transceiver module is also used to receive downlink control information (DCI) sent by the network device; The processing module is used to determine 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 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.

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

53. A communication device, comprising: One or more processors; The communication device is used to perform 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 including a terminal and a network device, wherein the terminal is configured to implement the method of any one of claims 1 to 25; the network device is configured to implement the method of any one of claims 26 to 50.

55. A storage medium having stored thereon instructions, wherein the instructions, when executed on a communication device, cause the communication device to perform the method of any one of claims 1 to 25 or 26 to 50.

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