CN-116569581-B - Terminal, wireless communication method and base station

Abstract

The terminal according to one aspect of the present disclosure includes a receiving unit configured to receive downlink control information common to a group indicating a transmission setting instruction state (TCI state), and a control unit configured to control transmission of feedback information indicating success or failure of reception of the downlink control information. According to an aspect of the present disclosure, information related to QCL can be appropriately determined.

Inventors

• MATSUMURA YUSUKE
• NAGATA AKIRA
• WANG JING
• SUN WEIQI

Assignees

• 株式会社NTT都科摩

Dates

Publication Date

20260508

Application Date

20200915

Claims (4)

1. 1. A terminal, comprising: A receiving unit configured to receive an RRC IE which is a radio resource control information element (RRC) indicating a plurality of TCI states which are a plurality of transmission setting indication states and which is specific to each of a plurality of terminals, and to receive Downlink Control Information (DCI) which is common to the plurality of terminals, and And a control unit configured to apply a TCI state indicated by the DCI to at least one of uplink and downlink signals after a time period for reporting as a terminal capability has elapsed since the DCI was received.
2. 2.A wireless communication method for a terminal includes: A step of receiving an RRC IE which is a radio resource control information element (RRC) indicating a plurality of TCI states which are a plurality of transmission setting indication states and which is specific to each of a plurality of terminals, and receiving DCI which is downlink control information common to the plurality of terminals, and And a step of applying the TCI status indicated by the DCI to a signal of at least one of an uplink and a downlink after a time reported as a terminal capability has elapsed since the reception of the DCI.
3. 3. A base station, comprising: a transmission unit for transmitting a radio resource control information element (RRC IE) indicating a plurality of TCI states, which are a plurality of transmission setting indication states, and each specific to a plurality of terminals, and transmitting Downlink Control Information (DCI) common to the plurality of terminals, and A control unit that applies a TCI state indicated by the DCI to a signal of at least one of an uplink and a downlink after a time period that is reported as a terminal capability by the terminal has elapsed since the terminal received the DCI.
4. 4. A system having a terminal and a base station, The terminal has: A receiving unit configured to receive an RRC IE which is a radio resource control information element (RRC) indicating a plurality of TCI states which are a plurality of transmission setting indication states and which is specific to each of a plurality of terminals, and to receive Downlink Control Information (DCI) which is common to the plurality of terminals, and A control unit configured to apply a TCI status indicated by the DCI to a signal of at least one of an uplink and a downlink after a time period for reporting as a terminal capability has elapsed since the reception of the DCI, The base station has: And a transmitting unit configured to transmit the RRC IE and transmit the DCI.

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)) 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 large capacity, high altitude, and the like of LTE (third generation partnership project (Third Generation Partnership Project (3 GPP)) Release (rel.)) versions 8 and 9, LTE-Advanced (3 GPP rel.10-14) is 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 36.300V8.12.0"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 (for example, NR), it is being studied that a User terminal (terminal), user Equipment (UE)) controls transmission/reception processing based on information (QCL assumption/transmission setting indication (Transmission Configuration Indication (TCI)) related to Quasi Co-Location (QCL). However, there are cases where information related to QCL is ambiguous. If the information related to QCL is not clear, there is a concern that degradation of communication quality, degradation of throughput, and the like may result. Accordingly, it is an object of the present disclosure to provide a terminal, a wireless communication method, and a base station that appropriately determine information related to QCL. Means for solving the problems The terminal according to one aspect of the present disclosure includes a receiving unit configured to receive downlink control information common to a group indicating a transmission setting instruction state (TCI state), and a control unit configured to control transmission of feedback information indicating success or failure of reception of the downlink control information. Effects of the invention According to an aspect of the present disclosure, information related to QCL can be appropriately determined. Drawings Fig. 1 is a diagram showing an example of a common beam for both DL and UL. Fig. 2 is a diagram showing an example of a common beam for DL and a common beam for UL. Fig. 3 is a diagram showing an example of use case 0. Fig. 4 is a diagram showing an example of use example 1. Fig. 5 is a diagram showing an example of use example 2. Fig. 6 is a diagram showing an example of TCI status for a UE group. Fig. 7 is a diagram showing an example of setting 1 according to the first embodiment. Fig. 8 is a diagram showing an example of setting 2 according to the first embodiment. Fig. 9A and 9B are diagrams showing an example of updating the TCI concept according to the first embodiment. Fig. 10A and 10B are diagrams illustrating an example of success/failure of reception of the group common DCI. Fig. 11 is a diagram illustrating an example of PUCCH resource setting according to embodiment 3-1. Fig. 12 is a diagram showing an example of PUCCH resource setting according to embodiment 3-2. Fig. 13A and 13B are diagrams illustrating an example of group common PUCCH resources. Fig. 14 is a diagram showing an example of the operation according to embodiment 3-3. Fig. 15 is a diagram showing an example of the operation according to modes 3 to 4. Fig. 16 is a diagram showing an example of the operation according to the fourth embodiment. Fig. 17 is a diagram showing an example of a schematic configuration of a radio communication system according to an embodiment. Fig. 18 is a diagram showing an example of a configuration of a base station according to an embodiment. Fig. 19 is a diagram showing an example of a configuration of a user terminal according to an embodiment. Fig. 20 is a diagram showing an example of a hardware configuration of a base station and a user terminal according to an embodiment. Detailed Description (TCI, spatial relationship, QCL) In NR, it is being studied to control a reception process (e.g., at least one of reception, demapping, demodulation, decoding), a transmission process (e.g., at least one of transmission, mapping, precoding, modulation, encoding) of at least one of a signal and a channel (expressed as a signal/channel) in a UE based on a transmission setting instruction state (Transmission Configuration Indication state (TCI sta