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EP-4742576-A1 - SIGNAL TRANSMISSION METHOD AND DEVICE

EP4742576A1EP 4742576 A1EP4742576 A1EP 4742576A1EP-4742576-A1

Abstract

The disclosure relates to a signal transmission method and a device. The signal transmission method includes the following. A terminal device transmits a phase-tracking reference signal (PTRS), where a number of transmission layers associated with a PTRS port is less than or equal to a number of transmission layers of a discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-S-OFDM) waveform physical uplink shared channel (PUSCH), and the number of transmission layers of the DFT-S-OFDM waveform PUSCH is greater than or equal to 2. With embodiments of the disclosure, when transmitting a PTRS, the terminal device can support mapping in multi-layer PUSCH transmission when the number of transmission layers of the DFT-S-OFDM waveform PUSCH is greater than or equal to 2.

Inventors

  • LIU, Zhe

Assignees

  • GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.

Dates

Publication Date
20260513
Application Date
20230705

Claims (20)

  1. A signal transmission method, comprising: transmitting, by a terminal device, a phase-tracking reference signal (PTRS), wherein a number of transmission layers associated with a PTRS port is less than or equal to a number of transmission layers of a discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-S-OFDM) waveform physical uplink shared channel (PUSCH), and the number of transmission layers of the DFT-S-OFDM waveform PUSCH is greater than or equal to 2.
  2. The method of claim 1, further comprising: determining, by the terminal device, mapping information of the PTRS according to first information or a predefined rule.
  3. The method of claim 2, wherein the mapping information of the PTRS comprises at least one of: PTRS port number information; a transmission layer associated with a PTRS port; a mapping layer of a PTRS port; time density information of the PTRS corresponding to a mapping layer of a PTRS port; or a mapping pattern of the PTRS corresponding to a mapping layer of a PTRS port.
  4. The method of claim 3, wherein the mapping pattern of the PTRS corresponding to the mapping layer of the PTRS port comprises a PTRS group pattern at the mapping layer of the PTRS port.
  5. The method of claim 4, wherein the PTRS group pattern at the mapping layer of the PTRS port comprises at least one of: a PTRS group corresponding to the mapping layer of the PTRS port; a number of PTRS samples comprised in a PTRS group; or a mapping position of a PTRS sample.
  6. The method of any of claims 2 to 5, wherein the first information comprises a precoding information and number of layers (TPMI) and/or a maximum number of PTRS ports, and PTRS port number information is determined by the terminal device according to the TPMI and/or the maximum number of PTRS ports.
  7. The method of any of claims 3 to 5, wherein the number of transmission layers associated with the PTRS port is greater than or equal to 1.
  8. The method of claim 7, wherein a number of mapping layers of the PTRS port is less than the number of transmission layers associated with the PTRS port.
  9. The method of claim 8, wherein the mapping layers of the PTRS port is a subset of the transmission layers associated with the PTRS port.
  10. The method of claim 8 or 9, wherein the first information or the predefined rule is used to determine a mapping layer of the PTRS port from the transmission layers associated with the PTRS port.
  11. The method of claim 10, wherein the first information or the predefined rule specifies one or more transmission layers with a smallest index among the transmission layers associated with the PTRS port as a mapping layer of the PTRS port.
  12. The method of any of claims 8 to 11, wherein each PTRS port corresponds to one mapping layer, and different PTRS ports have a same PTRS group pattern at corresponding mapping layers.
  13. The method of any of claims 8 to 11, wherein each PTRS port corresponds to one mapping layer, and different PTRS ports have different PTRS group patterns at corresponding mapping layers.
  14. The method of claim 13, wherein the first information or the predefined rule specifies a mapping position of a PTRS sample of a first PTRS port and an offset of a mapping position of a PTRS sample of a second PTRS port relative to the mapping position of the PTRS sample of the first PTRS port, and wherein the second PTRS port comprises another PTRS port of the terminal device other than the first PTRS port.
  15. The method of claim 7, wherein a number of mapping layers of the PTRS port is equal to the number of transmission layers associated with the PTRS port.
  16. The method of claim 15, wherein each PTRS port corresponds to two or more mapping layers, and a same PTRS port has a same PTRS group pattern at different mapping layers.
  17. The method of claim 15, wherein each PTRS port corresponds to two or more mapping layers, and a same PTRS port has different PTRS group patterns at different mapping layers.
  18. The method of claim 15, wherein a same PTRS port has different PTRS groups at different mapping layers.
  19. The method of claim 18, wherein the first information or the predefined rule specifies an association between a PTRS group of a PTRS port and a mapping layer of the PTRS port.
  20. The method of any of claims 17 to 19, wherein mapping positions of PTRS samples of a same PTRS port at different mapping layers do not overlap.

Description

TECHNICAL FIELD The disclosure relates to the field of communications, and more specifically, to a signal transmission method, a terminal device, and a network device. BACKGROUND In new radio (NR) technologies, a phase-tracking reference signal (PTRS or PT-RS) is typically used to estimate a phase noise, and the estimated phase noise is used to compensate for phase noise errors, thereby improving communication quality. Related technologies support mapping a PTRS to a physical uplink shared channel (PUSCH) with a discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-S-OFDM) waveform or a cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) waveform. For the DFT-S-OFDM waveform, existing technologies only map the PTRS in single-layer PUSCH transmission, and there is no solution for mapping the PTRS in multi-layer transmission. SUMMARY Embodiments of the disclosure provide a signal transmission method and a device, which maps a phase-tracking reference signal (PTRS) in multi-layer PUSCH transmission when the number of transmission layers of a discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-S-OFDM) waveform PUSCH is greater than or equal to 2. Embodiments of the disclosure provide a signal transmission method. The method includes the following. A terminal device transmits a PTRS, where a number of transmission layers associated with a PTRS port is less than or equal to a number of transmission layers of a DFT-S-OFDM waveform physical uplink shared channel (PUSCH), and the number of transmission layers of the DFT-S-OFDM waveform PUSCH is greater than or equal to 2. Embodiments of the disclosure provide a signal transmission method. The method includes the following. A network device receives a PTRS, where a number of transmission layers associated with a PTRS port is less than or equal to a number of transmission layers of a DFT-S-OFDM waveform PUSCH, and the number of transmission layers of the DFT-S-OFDM waveform PUSCH is greater than or equal to 2. Embodiments of the disclosure provide a terminal device. The terminal device includes a first transmitting unit. The first transmitting unit is configured to transmit a PTRS, where a number of transmission layers associated with a PTRS port is less than or equal to a number of transmission layers of a DFT-S-OFDM waveform PUSCH, and the number of transmission layers of the DFT-S-OFDM waveform PUSCH is greater than or equal to 2. Embodiments of the disclosure provide a network device. The network device includes a second receiving unit. The second receiving unit is configured to receive a PTRS, where a number of transmission layers associated with a PTRS port is less than or equal to a number of transmission layers of a DFT-S-OFDM waveform PUSCH, and the number of transmission layers of the DFT-S-OFDM waveform PUSCH is greater than or equal to 2. Embodiments of the disclosure provide a terminal device. The terminal device includes a transceiver, a memory configured to store computer programs, and a processor configured to invoke and execute the computer programs stored in the memory and control the transceiver, to cause the terminal device to perform the signal transmission method. Embodiments of the disclosure provide a network device. The network device includes a transceiver, a memory configured to store computer programs, and a processor configured to invoke and execute the computer programs stored in the memory and control the transceiver, to cause the network device to perform the signal transmission method. Embodiments of the disclosure provide a chip configured to perform the signal transmission method. Specifically, the chip includes a processor configured to invoke and execute computer programs stored in a memory, to cause a device equipped with the chip to perform the signal transmission method. Embodiments of the disclosure provide a computer-readable storage medium configured to storing computer programs which, when executed by a device, cause the device to perform the signal transmission method. Embodiments of the disclosure provide a computer program product including computer program instructions which are operable with a computer to perform the signal transmission method. Embodiments of the disclosure provide a computer program which, when executed on a computer, cause the computer to perform the signal transmission method. With embodiments of the disclosure, when transmitting a PTRS, the terminal device can support mapping in multi-layer PUSCH transmission when the number of transmission layers of the DFT-S-OFDM waveform PUSCH is greater than or equal to 2. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of an application scenario according to embodiments of the disclosure.FIG. 2 is a schematic flowchart of a signal transmission method 200 according to an embodiment of the disclosure.FIG. 3A is a schematic diagram of a mapping relationship according to embodi