CN-122029917-A - Terminal, wireless communication method and base station

Abstract

The terminal according to one aspect of the present disclosure includes a control unit configured to determine a specific antenna port orthogonal to a first antenna port used for receiving Physical Downlink Control Channels (PDCCHs) of a plurality of layers, and a reception unit configured to receive PDCCHs of the plurality of layers assuming that the specific antenna port is not associated with a Physical Downlink Shared Channel (PDSCH) and a PDCCH for a specific other terminal. According to the mode of the present disclosure, resource efficiency can be improved.

Inventors

• Koga shuneko
• MATSUMURA YUSUKE
• Dao Kangjie
• True Okamura
• NAGATA AKIRA

Assignees

• 株式会社NTT都科摩

Dates

Publication Date

20260512

Application Date

20230818

Claims (6)

1. 1. A terminal, comprising: A control unit for judging a specific antenna port orthogonal to a first antenna port for receiving PDCCH, which is a physical downlink control channel of a plurality of layers, and The reception means is configured to receive the PDCCH of the plurality of layers without associating the specific antenna port with PDSCH and PDCCH which are physical downlink shared channels for specific other terminals.
2. 2. The terminal of claim 1, wherein, The specific antenna port is an antenna port other than the first antenna port orthogonal to the first antenna port.
3. 3. The terminal of claim 1, wherein, The specific antenna port is an antenna port orthogonal to the first antenna port using frequency division multiplexing, time division multiplexing, frequency domain orthogonal cover code, time domain orthogonal cover code, or frequency domain orthogonal cover code for a demodulation reference signal of the PDCCH.
4. 4. The terminal of claim 1, wherein, The specific other terminal is the other terminal capable of receiving the PDCCH using only one layer.
5. 5. A wireless communication method for a terminal includes: A step of judging a specific antenna port orthogonal to a first antenna port for reception of a Physical Downlink Control Channel (PDCCH) of a plurality of layers, and The step of receiving the PDCCH of the plurality of layers without associating the specific antenna port with the PDSCH and the PDCCH which are physical downlink shared channels for the specific other terminal is assumed.
6. 6. A base station, comprising: A control unit indicating a specific antenna port orthogonal to a first antenna port for reception of a PDCCH, which is a physical downlink control channel for a plurality of layers, and And a transmitting unit configured to transmit the PDCCH of the plurality of layers without associating the specific antenna port with a PDSCH and a PDCCH, which are physical downlink shared channels for specific other terminals.

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, LTE-Advanced (3 GPP rel.10-14) has been standardized for the purpose of further large capacity, advanced evolution, and the like of LTE (Third Generation Partnership Project (3 GPP (registered trademark)) Release (Release) 8, 9). 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 of a downlink control channel. However, no adequate research has been conducted on specific methods thereof. If this 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 The terminal according to one aspect of the present disclosure includes a control unit configured to determine a specific antenna port orthogonal to a first antenna port used for receiving Physical Downlink Control Channels (PDCCHs) of a plurality of layers, and a reception unit configured to receive PDCCHs of the plurality of layers assuming that the specific antenna port is not associated with a Physical Downlink Shared Channel (PDSCH) and a PDCCH for a specific other terminal. 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 1 slot/symbol of each channel. Fig. 1B is a diagram showing an example of the number of accommodated UEs per 1 cell of each channel. Fig. 2A and 2B are diagrams illustrating an example of overlapping of resources of PDCCH candidates. 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. 14 is a diagram showing an example of a schematic configuration of a radio communication system according to an embodiment. Fig. 15 is a diagram showing an example of the configuration of a base station according to an embodiment. Fig. 16 is a diagram showing an example of a configuration of a user terminal according to an embodiment. Fig. 17 is a diagram showing an example of a hardware configuration of a base station and a user terminal according to an embodiment. Fig. 18 is a diagram showing an example of a vehicle according to an embodiment. Detailed Description (Minimum quality assurance in future Wireless communication systems) In existing wireless communication systems (e.g., rel. 15-17), mobile communication using public networks is generally a so-called best-effort (best-effort) type communication. Such communication has a feature that the communication carrier cannot control the instantaneous increase in traffic. For example, in a dense environment such as a concert/stadium, when business transients or explosions increase, there is a problem that minimum commun