CN-122029920-A - Terminal, wireless communication method and base station

CN122029920ACN 122029920 ACN122029920 ACN 122029920ACN-122029920-A

Abstract

A terminal according to an aspect of the present disclosure includes a reception unit that receives a demodulation reference signal (DMRS) that is a DMRS mapped using a frequency domain orthogonal cover code (FD-OCC), a time domain OCC (TD-OCC), a frequency domain and time domain OCC, a Frequency Division Multiplexing (FDM), or a Time Division Multiplexing (TDM), and that is a DMRS of a Physical Downlink Control Channel (PDCCH) using a plurality of layers, and a control unit that controls reception of the PDCCH based on the DMRS. According to the mode of the present disclosure, resource efficiency can be improved.

Inventors

MATSUMURA YUSUKE
Koga shuneko
Dao Kangjie
True Okamura

Assignees

株式会社NTT都科摩

Dates

Publication Date: 20260512
Application Date: 20230818

Claims (6)

1. A terminal, comprising: a receiving unit for receiving a demodulation reference signal (DMRS) mapped using a frequency domain orthogonal cover code (FD-OCC), a time domain OCC (TD-OCC), frequency domain and time domain OCC, a Frequency Division Multiplexing (FDM) or a Time Division Multiplexing (TDM), and a Physical Downlink Control Channel (PDCCH) using a plurality of layers, and And a control unit for controlling the reception of the PDCCH based on the DMRS.
2. The terminal of claim 1, wherein, The control unit determines that an antenna port number for a first layer of the plurality of layers is the same as an antenna port number corresponding to a PDCCH that does not use the plurality of layers.
3. The terminal of claim 1, wherein, The reception unit receives a first setting regarding the number of the plurality of layers and a second setting regarding antenna port numbers corresponding to the PDCCH and the DMRS, The control unit detects downlink control information transmitted in the PDCCH based on the first setting and the second setting.
4. The terminal of claim 1, wherein, In the case where, among the DMRS transmitted using the FDM or the DMRS transmitted using the TDM, the DMRS symbol corresponding to the specific port is not transmitted, the control unit assumes that the power density in the time resource of the DMRS symbol is equal to the power density in the time resource other than the time resource.
5. A wireless communication method for a terminal includes: A step of receiving a demodulation reference signal (DMRS) mapped using a frequency domain orthogonal cover code (FD-OCC), a time domain OCC (TD-OCC), frequency and time domain OCC, a Frequency Division Multiplexing (FDM) or a Time Division Multiplexing (TDM), and a Physical Downlink Control Channel (PDCCH) using a plurality of layers, and And controlling the reception of the PDCCH based on the DMRS.
6. A base station, comprising: A transmission unit configured to transmit a demodulation reference signal (DMRS) mapped using a frequency domain orthogonal cover code (FD-OCC), a time domain OCC (TD-OCC), frequency domain and time domain OCC, a Frequency Division Multiplexing (FDM) or a Time Division Multiplexing (TDM), and a Physical Downlink Control Channel (PDCCH) using a plurality of layers, and And a control unit which uses the DMRS to instruct the reception process of the PDCCH.

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 Telecommunication System (UMTS)) network, long term evolution (Long Term Evolution (LTE)) is 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 increasing capacity, height, and the like of LTE (third generation partnership project (3 rd Generation Partnership Project (3 GPP (registered trademark))) versions (Release (rel.)) 8 and 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 are also being 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 In future wireless communication systems (e.g., NR), for example, from the viewpoint of improving resource efficiency, it is being studied to improve the capacity (capability) of a downlink control channel. However, the specific method thereof has not been studied sufficiently. If the study is insufficient, there is a concern that the improvement of resource efficiency is hindered and the increase of communication throughput is suppressed. Accordingly, it is an object of the present disclosure to provide a terminal, a wireless communication method, and a base station capable of improving resource efficiency. Means for solving the problems A terminal according to an aspect of the present disclosure includes a reception unit that receives a demodulation reference signal (DMRS) that is a DMRS mapped using a frequency domain orthogonal cover code (FD-OCC), a time domain OCC (TD-OCC), a frequency domain and time domain OCC, a Frequency Division Multiplexing (FDM), or a Time Division Multiplexing (TDM), and that is a DMRS of a Physical Downlink Control Channel (PDCCH) using a plurality of layers, and a control unit that controls reception of the PDCCH based on the DMRS. Effects of the invention According to the mode of the present disclosure, resource efficiency can be improved. Drawings Fig. 1A is a diagram showing an example of the number of accommodated UEs per slot/symbol of each channel. Fig. 1B is a diagram showing an example of the number of accommodated UEs per cell of each channel. Fig. 2 is a diagram showing an example of an antenna port PDCCH DMRS. Fig. 3 is a diagram showing an example of PDCCH DMRS to which FD-OCC is applied. Fig. 4 is a diagram showing another example of PDCCH DMRS to which FD-OCC is applied. Fig. 5 is a diagram showing another example of PDCCH DMRS to which FD-OCC is applied. Fig. 6 is a diagram showing an example of PDCCH DMRS to which TD-OCC is applied. Fig. 7 is a diagram showing another example of PDCCH DMRS to which the TD-OCC is applied. Fig. 8 is a diagram showing an example of PDCCH DMRS to which FD-OCC and TD-OCC are applied. Fig. 9 is a diagram showing another example of PDCCH DMRS to which FD-OCC and TD-OCC are applied. Fig. 10 is a diagram showing an example of PDCCH DMRS to which FDM is applied. Fig. 11 is a diagram showing another example of PDCCH DMRS to which FDM is applied. Fig. 12 is a diagram showing an example of PDCCH DMRS to which TDM is applied. Fig. 13 is a diagram showing another example of PDCCH DMRS to which TDM is applied. Fig. 14A and 14B are diagrams showing an example of an OCC sequence. FIG. 15 is a diagram showing another example of the OCC sequence. Fig. 16A and 16B are diagrams showing other examples of OCC sequences. FIG. 17 is a diagram showing another example of the OCC sequence. Fig. 18 is a diagram showing another example of the OCC sequence. Fig. 19 is a diagram showing an example of transmission power of PDCCH/DMRS according to the third embodiment. Fig. 20 is a diagram showing an example of a schematic configuration of a radio communication system according to an embodiment. Fig. 21 is a diagram showing an example of a configuration of a base station according to an embodiment. Fig. 22 is a diagram showing an example of a configuration of a user terminal according to an embodiment. Fig. 23 is a diagram showing an example of a hardware configuration of a base station and a user terminal according to an embodiment. Fig. 24 is a diagram showing an example of a vehicle according to an embodiment. Detailed Description (Minimum