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CN-122003843-A - Terminal, wireless communication method and base station

CN122003843ACN 122003843 ACN122003843 ACN 122003843ACN-122003843-A

Abstract

The terminal according to one aspect of the present disclosure includes a receiving unit that receives a setting of a dynamic instruction of a transform precoder and receives the dynamic instruction, and a control unit that applies a demodulation reference signal (DMRS) type based on the setting and a waveform based on the dynamic instruction to transmission of a Physical Uplink Shared Channel (PUSCH).

Inventors

  • MATSUMURA YUSUKE
  • NAGATA AKIRA

Assignees

  • 株式会社NTT都科摩

Dates

Publication Date
20260508
Application Date
20241001
Priority Date
20231012

Claims (6)

  1. 1. A terminal, comprising: a receiving unit for receiving the setting of the dynamic indication of the transform precoder and receiving the dynamic indication, and And a control unit which applies the waveform based on the set demodulation reference signal DMRS type and the dynamic indication to the transmission of a Physical Uplink Shared Channel (PUSCH).
  2. 2. The terminal of claim 1, wherein, The control unit is not envisaged to be set to DMRS type 2.
  3. 3. The terminal of claim 1, wherein, In the event that the dynamic indication indicates the invalidation of the transform precoder, the control unit applies a particular DMRS type to the transmission, In case the dynamic indication indicates that a transform precoder is active, the control unit applies DMRS type 1 to the transmission.
  4. 4. The terminal of claim 1, wherein, In the case where DMRS type 1 is set and DMRS in which a frequency domain orthogonal cover code FD-OCC of length 4 is applied to the PUSCH is set, the control unit applies an FD-OCC of length 2 to the DMRS of the PUSCH.
  5. 5. A wireless communication method for a terminal includes: A step of receiving a setting of a dynamic instruction of the transform precoder; a step of receiving the dynamic indication, and And applying the demodulation reference signal (DMRS) type based on the setting and the waveform based on the dynamic indication to a Physical Uplink Shared Channel (PUSCH).
  6. 6. A base station, comprising: A transmitting unit for transmitting the setting of the dynamic instruction of the conversion precoder and transmitting the dynamic instruction, and And a control unit which applies the waveform based on the set demodulation reference signal DMRS type and the dynamic indication to the receiving of the Physical Uplink Shared Channel (PUSCH).

Description

Terminal, wireless communication method and base station Technical Field The present disclosure relates to a terminal, a wireless communication method, and a base station in a next generation mobile communication system. Background In a universal mobile telecommunications system (Universal Mobile Telecommunications System (UMTS)) network, long term evolution (Long Term Evolution (LTE)) has been standardized for the purpose of further high-speed data rates, low latency, and the like (non-patent document 1). Further, for the purpose of further large capacity, advancement, and the like of LTE (third generation partnership project (Third Generation Partnership Project (3 GPP (registered trademark))) releases (Release (Rel.)) 8, 9), LTE-Advanced (3 GPP Rel. 10-14) has been standardized. Subsequent systems of LTE (e.g., also referred to as fifth generation mobile communication system (5 th generation mobile communication system (5G)), 5g+ (plus), sixth generation mobile communication system (6 th generation mobile communication system (6G)), new Radio (NR)), 3GPP Rel. 15 later, and the like have also been studied. Prior art literature Non-patent literature Non-patent document 1：3GPP TS 36.300 V8.12.0 "Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)",2010, month 4 Disclosure of Invention Problems to be solved by the invention For orthogonalization of layers, etc., reference signals (e.g., demodulation reference signals (DeModulation REFERENCE SIGNAL (DMRS)) of a plurality of ports are utilized. In future wireless communication systems, increasing the DMRS port number beyond the existing specifications is being studied. The setting/application of DMRS at this time has not been fully studied. If the DMRS is not properly set and applied, there is a concern that communication throughput/communication quality is deteriorated. Accordingly, it is an object of the present disclosure to provide a terminal, a wireless communication method, and a base station to which an appropriate DMRS is applied. Means for solving the problems The terminal according to one aspect of the present disclosure includes a receiving unit that receives a setting of a dynamic instruction of a transform precoder and receives the dynamic instruction, and a control unit that applies a demodulation reference signal (DMRS) type based on the setting and a waveform based on the dynamic instruction to transmission of a Physical Uplink Shared Channel (PUSCH). Effects of the invention According to an aspect of the present disclosure, an appropriate DMRS can be applied. Drawings Fig. 1A to 1B show an example of a conventional DMRS port table for DMRS setting type 1/2 for PDSCH. Fig. 2A to 2B show an example of a conventional DMRS port table for DMRS setting type 1/2 for PUSCH. Fig. 3A to 3B show an example of association between CDM groups, DMRS ports, and OCCs in enhancement type 1/enhancement type 2. Fig. 4 shows an example of parameters for PDSCH DMRS setting type 1. Fig. 5 shows an example of setting parameters of type 2 for PDSCH DMRS. Fig. 6 shows an example of parameters for PUSCH DMRS setting type 1. Fig. 7 shows an example of parameters for PUSCH DMRS setting type 2. Fig. 8A to 8B show an example of DMRS enhancement type 1 and mapping of FD-OCC to RE. Fig. 9A to 9B show an example of DMRS enhancement type 2 and mapping of FD-OCC to RE. Fig. 10 shows another example of DMRS enhancement type 2 and mapping of FD-OCC to RE. Fig. 11 is a diagram showing an example of a schematic configuration of a radio communication system according to an embodiment. Fig. 12 is a diagram showing an example of a configuration of a base station according to an embodiment. Fig. 13 is a diagram showing an example of a configuration of a user terminal according to an embodiment. Fig. 14 is a diagram showing an example of a hardware configuration of a base station and a user terminal according to an embodiment. Fig. 15 is a diagram showing an example of a vehicle according to an embodiment. Detailed Description (DMRS) The preamble (front loaded) demodulation reference signal (demodulation reference signal: deModulation REFERENCE SIGNAL (DMRS)) is the original (first symbol or symbol near the first) DMRS for earlier demodulation. The additional DMRS can be set for a high-speed mobile terminal (terminal), a User terminal (User Equipment (UE)) or a high modulation coding scheme (modulation and coding scheme (MCS))/rank (rank) by RRC. The frequency position of the additional DMRS is the same as that of the pre-DMRS. For the time domain, DMRS mapping type a or B is set. In DMRS mapping type a, DMRS position l_0 is counted by a symbol index within a slot. l_0 is set by a MIB or a parameter (dmrs-TypeA-Position) within the common serving cell setting (ServingCellConfigCommon). DMRS position O (reference point l) means the first symbol of the slot or each hop. In DMRS mappin