CN-115004825-B - Terminal and wireless communication method

CN115004825BCN 115004825 BCN115004825 BCN 115004825BCN-115004825-B

Abstract

A terminal according to an aspect of the present disclosure includes a receiving unit that receives at least one of 1 downlink control information used for scheduling a Plurality of Downlink Shared Channels (PDSCHs) and a plurality of downlink control information used for scheduling a plurality of PDSCHs, respectively, and a control unit that controls reception of the plurality of PDSCHs in a specific period based on at least one of a quasi-co-address corresponding to a1 st control resource set for the 1 st downlink control information and a quasi-co-address corresponding to a2 nd control resource set for the plurality of downlink control information.

Inventors

MATSUMURA YUSUKE
NAGATA AKIRA

Assignees

株式会社NTT都科摩

Dates

Publication Date: 20260508
Application Date: 20191128

Claims (4)

1. A terminal, comprising: A control unit for controlling quasi co-location used for receiving the PDSCH based on whether offset between the downlink control information and the PDSCH which is the corresponding downlink shared channel is shorter than a specific period, and A receiving unit configured to receive at least one of one piece of downlink control information used for scheduling of a plurality of PDSCHs and a plurality of pieces of downlink control information used for scheduling of a plurality of PDSCHs, The plurality of downlink control information are transmitted through downlink control channels of control resource sets corresponding to different control resource pool indexes, respectively, When the control resource sets for the plurality of pieces of downlink control information are set, the control resource set for the one piece of downlink control information is not set.
2. The terminal of claim 1, wherein, The control resource sets corresponding to the different control resource pool indexes are set in the BWP of the serving cell.
3. A wireless communication method for a terminal includes: a step of controlling quasi co-location used for receiving the PDSCH based on whether or not an offset between the downlink control information and a corresponding downlink shared channel (PDSCH) is shorter than a specific period, and A step of receiving at least one of one piece of downlink control information used for scheduling the plurality of PDSCHs and a plurality of pieces of downlink control information used for scheduling the plurality of PDSCHs, The plurality of downlink control information are transmitted through downlink control channels of control resource sets corresponding to different control resource pool indexes, respectively, When the control resource sets for the plurality of pieces of downlink control information are set, the control resource set for the one piece of downlink control information is not set.
4. A system comprising a terminal and a base station, The terminal has: A control unit for controlling quasi co-location used for receiving the PDSCH based on whether offset between the downlink control information and the PDSCH which is the corresponding downlink shared channel is shorter than a specific period, and A receiving unit configured to receive at least one of one piece of downlink control information used for scheduling of a plurality of PDSCHs and a plurality of pieces of downlink control information used for scheduling of a plurality of PDSCHs, The base station has: A transmitting unit for transmitting at least one of the one downlink control information and the plurality of downlink control information, and A control unit for controlling quasi co-location used in the PDSCH, The plurality of downlink control information are transmitted through downlink control channels of control resource sets corresponding to different control resource pool indexes, respectively, When the control resource sets for the plurality of pieces of downlink control information are set, the control resource set for the one piece of downlink control information is not set.

Description

Terminal and wireless communication method Technical Field The present disclosure relates to a terminal and a wireless communication method 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, LTE-Advanced (3 GPP rel.10-14) has been standardized for the purpose of further increase in capacity, height, and the like from LTE (Third Generation Partnership Project (3 GPP) Release (rel.)) 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+ (5G plus), 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 36.300V8.12.0"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, such as NRs, it is being studied that User terminals (User Equipment (UE)) control transmission and reception processes based on information about Quasi Co-Location (QCL). Further, in NR, it is being studied to consider that 1 or more Transmission/Reception points (TRP) (multiple TRPs) use 1 or more panels (multi-panels) for DL Transmission (e.g., PDSCH Transmission) to a UE. However, in the previous NR specifications, since the multi-panel/TRP is not considered, QCL parameters in the case of using the multi-panel/TRP cannot be appropriately determined. If QCL parameters cannot be properly determined, there is a concern of system performance degradation such as a decrease in throughput. It is, therefore, one of the objects of the present disclosure to provide a terminal and a wireless communication method that appropriately determine QCL parameters for multi-panel/TRP. Means for solving the problems The terminal according to an aspect of the present disclosure is characterized by comprising a reception unit configured to receive at least one of 1 downlink control information used for scheduling a Plurality of Downlink Shared Channels (PDSCHs) and a plurality of downlink control information used for scheduling the plurality of PDSCHs, respectively, and a control unit configured to control reception of the plurality of PDSCHs in a specific period based on at least one of a quasi-co-address corresponding to a1 st control resource set for the 1 st downlink control information and a quasi-co-address corresponding to a2 nd control resource set for the plurality of downlink control information. Effects of the invention According to an aspect of the present disclosure, QCL parameters for the multi-panel/TRP can be appropriately determined. Drawings Fig. 1 is a diagram illustrating an example of QCL estimation of DMRS ports of PDSCH. Fig. 2A to 2D are diagrams showing an example of a multi-TRP scene. Fig. 3A and 3B are diagrams illustrating an example of default QCL for multiple PDSCH. Fig. 4 is a diagram showing an example of the QCL time length corresponding to CORESET for single DCI and the QCL time length corresponding to CORESET for multiple DCI. Fig. 5A and 5B are diagrams illustrating an example of QCL concept according to the first embodiment. Fig. 6 is a diagram illustrating an example of QCL concept according to the second embodiment. Fig. 7A and 7B are diagrams illustrating an example of QCL concept according to the third embodiment. Fig. 8 is a diagram illustrating an example of QCL concept according to the fourth embodiment. Fig. 9 is a diagram showing an example of a schematic configuration of a radio communication system according to an embodiment. Fig. 10 is a diagram showing an example of the configuration of a base station according to an embodiment. Fig. 11 is a diagram showing an example of a configuration of a user terminal according to an embodiment. Fig. 12 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、QCL) In NR, it is studied to control a reception process (e.g., at least 1 of reception, demapping, demodulation, decoding) and a transmission process (e.g., at least 1 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 state)). The TCI state may also represent elements of a signal/channel applied to the downlink. Elements corresponding to the TCI state of the signal/channel applied to the uplink may also be expressed as spatial relationships. The