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KR-20260066721-A - Method and apparatus for transmitting and receiving uplink signals

KR20260066721AKR 20260066721 AKR20260066721 AKR 20260066721AKR-20260066721-A

Abstract

A method according to an embodiment of the present specification comprises the steps of receiving a DCI for scheduling a PUSCH, transmitting a DMRS associated with said PUSCH, and transmitting a PTRS associated with said PUSCH. The DCI includes i) an antenna port field and ii) a PTRS-DMRS association field. Based on said antenna port field, one or more DMRS ports are indicated. Based on said PTRS-DMRS association field, for each of the groups based on scheduled RBs, an association between said one or more DMRS ports and at least one PTRS port is indicated.

Inventors

  • 정찬호
  • 김형태
  • 강지원

Assignees

  • 엘지전자 주식회사

Dates

Publication Date
20260512
Application Date
20240912
Priority Date
20230918

Claims (17)

  1. In terms of method, A step of receiving Downlink Control Information (DCI) for scheduling a Physical Uplink Shared Channel (PUSCH); A step of transmitting a demodulation reference signal (DMRS) associated with the above PUSCH; and The method includes the step of transmitting a Phase Tracking Reference Signal (PTRS) associated with the above PUSCH; The above DCI includes i) an antenna port field and ii) a PTRS-DMRS association field, and One or more DMRS ports are indicated based on the above antenna port field, and A method characterized by indicating, for each of the groups based on scheduled resource blocks (RBs) based on the above PTRS-DMRS association field, an association between one or more DMRS ports and at least one PTRS port.
  2. In Article 1, The above PTRS-DMRS association field is based on multiple fields, and A method characterized by indicating the association for each of the groups based on the plurality of fields.
  3. In Article 2, A method characterized in that the number of the above plurality of fields is based on the number of groups set based on upper-level signaling.
  4. In Paragraph 3, A method characterized in that the above groups are determined based on i) the scheduled RBs and ii) the number of groups.
  5. In Article 1, A method characterized in that each group includes RB groups, and each RB group includes one or more RBs.
  6. In Article 5, A method characterized in that the above RB groups are continuous in the frequency domain.
  7. In Article 5, A method characterized in that the above RB groups are associated with the same precorder.
  8. In Article 7, A method characterized by the above groups being related to different precorders.
  9. In Article 1, A method characterized by joint encoding information indicating the association for each of the groups in the PTRS-DMRS association field.
  10. In Article 1, A method characterized by the above association being i) indicated based on the PTRS-DMRS association field, or ii) defined.
  11. In Article 10, i) based on the fact that the above PUSCH is associated with two codewords, and ii) the maximum number of the above at least one PTRS port is set to 1: A method characterized by the above association being defined based on i) one PTRS port and ii) a DMRS port associated with the codeword having the higher MCS (higher Modulation and Coding Scheme) among the two codewords.
  12. In Article 11, A method characterized in that the above-mentioned PTRS port is associated with the first DMRS port among the DMRS ports associated with the codeword having the above-mentioned high MCS.
  13. In the terminal, One or more transmitters/receivers; One or more processors; and It includes one or more memories connected to the above one or more processors and storing instructions, A terminal characterized by the above instructions enabling the terminal to perform all steps of the method according to any one of claims 1 to 12, based on execution by the one or more processors.
  14. In a device comprising one or more memories and one or more processors functionally connected to the one or more memories, An apparatus characterized in that the above one or more memories store instructions that cause the apparatus to perform all steps of the method according to any one of claims 1 to 12, based on execution by the above one or more processors.
  15. In a non-transitory computer-readable medium storing instructions, A non-transitory computer-readable medium characterized by the above instructions being executed by one or more processors, wherein the terminal performs all steps of the method according to any one of claims 1 to 12.
  16. In terms of method, A step of transmitting Downlink Control Information (DCI) for scheduling a Physical Uplink Shared Channel (PUSCH); A step of receiving a demodulation reference signal (DMRS) associated with the above PUSCH; and The method includes the step of receiving a Phase Tracking Reference Signal (PTRS) associated with the above PUSCH; The above DCI includes i) an antenna port field and ii) a PTRS-DMRS association field, and One or more DMRS ports are indicated based on the above antenna port field, and A method characterized by indicating, for each of the groups based on scheduled resource blocks (RBs) based on the above PTRS-DMRS association field, an association between one or more DMRS ports and at least one PTRS port.
  17. In the case of a base station, One or more transmitters/receivers; One or more processors; and It includes one or more memories connected to the above one or more processors and storing instructions, A base station characterized by the above instructions, based on execution by one or more processors, having the base station perform all steps of the method according to claim 16.

Description

Method and apparatus for transmitting and receiving uplink signals This specification relates to a method and apparatus for transmitting and receiving uplink signals. Mobile communication systems were developed to provide voice services while ensuring user mobility. However, mobile communication systems have expanded their scope to include data services as well as voice. Currently, due to the explosive increase in traffic leading to resource shortages and users demanding higher-speed services, more advanced mobile communication systems are required. The requirements for next-generation mobile communication systems largely include the ability to accommodate explosive data traffic, a dramatic increase in transmission rates per user, a significantly increased number of connected devices, very low end-to-end latency, and high energy efficiency. To achieve this, various technologies are being researched, such as dual connectivity, massive multiple input multiple output (MMIMO), in-band full duplex, non-orthogonal multiple access (NOMA), super wideband support, and device networking. According to the existing operation, in the case of PUSCH, the same precoding (wideband precoding) is applied to the scheduled RBs, and PTRS-DMRS association is indicated based on this. In the future, subband precoding may be supported in a frequency selective channel environment. Figure 1 is a diagram showing an example of an uplink transmission and reception operation. FIG. 2 shows an example of an SB group according to one embodiment of the present specification. FIG. 3 shows another example of an SB group according to one embodiment of the present specification. FIG. 4 shows another example of an SB group according to one embodiment of the present specification. FIG. 5 is a flowchart illustrating a method according to one embodiment of the present specification. FIG. 6 is a flowchart illustrating a method according to another embodiment of the present specification. FIG. 7 is a drawing showing the configuration of a first device and a second device according to an embodiment of the present specification. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. The detailed description disclosed below, together with the accompanying drawings, is intended to describe exemplary embodiments of the present invention and is not intended to represent the only embodiment in which the present invention may be practiced. The following detailed description includes specific details to provide a complete understanding of the present invention. However, those skilled in the art will know that the present invention may be practiced without such specific details. In some cases, to avoid obscuring the concept of the present invention, known structures and devices may be omitted or illustrated in the form of a block diagram focusing on the core functions of each structure and device. In the following, the downlink (DL) refers to communication from a base station to a terminal, and the uplink (UL) refers to communication from a terminal to a base station. In the downlink, the transmitter may be part of the base station and the receiver may be part of the terminal. In the uplink, the transmitter may be part of the terminal and the receiver may be part of the base station. The base station may be referred to as the first communication device and the terminal as the second communication device. The base station (BS) may be replaced by terms such as fixed station, Node B, eNB (evolved-NodeB), gNB (Next Generation NodeB), BTS (base transceiver system), Access Point (AP), network (5G network), AI system, RSU (road side unit), vehicle, robot, drone (Unmanned Aerial Vehicle, UAV), AR (Augmented Reality) device, VR (Virtual Reality) device, etc. In addition, the terminal may be fixed or mobile and may be replaced with terms such as UE (User Equipment), MS (Mobile Station), UT (user terminal), MSS (Mobile Subscriber Station), SS (Subscriber Station), AMS (Advanced Mobile Station), WT (Wireless terminal), MTC (Machine-Type Communication) device, M2M (Machine-to-Machine) device, D2D (Device-to-Device) device, vehicle, robot, AI module, drone (Unmanned Aerial Vehicle, UAV), AR (Augmented Reality) device, VR (Virtual Reality) device. DMRS (demodulation reference signal) DMRS reception procedure We will examine the DMRS-related operations for PDSCH reception. When receiving a PDSCH scheduled by DCI format 1_0 or when receiving a PDSCH before any dedicated upper layer configuration of dmrs-AdditionalPosition, maxLength, and dmrs-Type parameters, the terminal assumes that there is no PDSCH in any symbol carrying DM-RS except for a PDSCH with a duration of 2 symbols with PDSCH mapping type B, a single symbol front-loaded DM-RS of configuration type 1 is transmitted on DM-RS port 1000, and that all remaining orthogonal antenna ports are not involved in the transmission of PDSCH t