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EP-4068891-B1 - TERMINAL AND WIRELESS COMMUNICATION METHOD

EP4068891B1EP 4068891 B1EP4068891 B1EP 4068891B1EP-4068891-B1

Inventors

  • MATSUMURA, YUKI
  • NAGATA, SATOSHI

Dates

Publication Date
20260513
Application Date
20191128

Claims (5)

  1. A terminal (20) comprising: a control section (210) configured to control, based on an offset between downlink control information and a corresponding downlink shared channel, PDSCH, quasi co-location used for reception of the PDSCH; and a receiving section (220) configured to receive at least one of a single downlink control information being used for scheduling of multiple PDSCHs and multiple downlink control information being used for scheduling of multiple PDSCHs, wherein the multiple downlink control information is transmitted on downlink control channels of control resource sets corresponding to different control resource pool indices, and wherein when a control resource set for the multiple downlink control information is configured, a control resource set for the single downlink control information is not configured.
  2. The terminal (20) according to claim 1, wherein the control resource sets corresponding to the different control resource pool indices are configured in a Bandwidth Part (BWP) of a serving cell.
  3. A radio communication method for a terminal (20), comprising: controlling, based on an offset between downlink control information and a corresponding downlink shared channel (PDSCH), quasi co-location to be used for reception of the PDSCH; and receiving at least one of a single downlink control information being used for scheduling of multiple PDSCHs and multiple downlink control information being used for scheduling of the multiple PDSCHs, wherein the multiple downlink control information is transmitted on downlink control channels of control resource sets corresponding to different control resource pool indices, and wherein when a control resource set for the multiple downlink control information is configured, a control resource set for the single downlink control information is not configured.
  4. A base station (10) comprising: a transmitting section (120) configured to transmit at least one of a single downlink control information being used for scheduling of multiple downlink shared channels, PDSCHs, and multiple downlink control information being used for scheduling of the multiple PDSCHs; and a control section (110) configured to control quasi co-location to be used for the PDSCH, wherein the multiple downlink control information is transmitted on downlink control channels of control resource sets corresponding to different control resource pool indices, and wherein when a control resource set for the multiple downlink control information is configured, a control resource set for the single downlink control information is not configured.
  5. A system (1) comprising a terminal (20) and a base station (10), wherein the terminal (20) comprises: a control section (210) configured to control, based on an offset between downlink control information and a corresponding downlink shared channel, PDSCH, quasi co-location to be used for reception of the PDSCH; and a receiving section (220) configured to receive at least one of a single downlink control information being used for scheduling of multiple PDSCHs and multiple downlink control information being used for scheduling of the multiple PDSCHs, and the base station (10) comprises: a transmitting section (120) configured to transmit at least one of the single downlink control information and the multiple downlink control information; and a control section (110) configured to control quasi co-location to be used for the PDSCH, wherein the multiple downlink control information is transmitted on downlink control channels of control resource sets corresponding to different control resource pool indices, and wherein when a control resource set for the multiple downlink control information is configured, a control resource set for the single downlink control information is not configured.

Description

Technical Field The present disclosure relates to a terminal and a radio communication method of a next-generation mobile communication system. Background Art In Universal Mobile Telecommunications System (UMTS) networks, for the purpose of higher data rates and lower latency, Long Term Evolution (LTE) has been specified (Non-Patent Literature 1). Furthermore, for the purpose of a larger capacity and higher sophistication than those of LTE (Third Generation Partnership Project (3GPP) Releases (Rel.) 8 and 9), LTE-Advanced (3GPP Rel. 10 to 14) has been specified. LTE successor systems (also referred to as, for example, the 5th generation mobile communication system (5G), 5G+ (plus), New Radio (NR) or 3GPP Rel. 15 or subsequent releases) are also studied Furthermore, Non-Patent Literature 2 and 3 relate to multi-TRP/multi-panel transmission. Citation List Non-Patent Literature Non-Patent Literature 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)", April 2010Non-Patent Literature 2: ZTE: "Enhancements on Multi-TRP and Multi-panel Transmission", 3GPP DR AFT R1-1911930Non-Patent Literature 3: INTEL CORPORATION: "On multi-TRP/multi-panel transmission", 3GPP DRAFT R1-1901275 Summary of Invention Technical Problem It is studied for a future radio communication system (e.g., NR) that a user terminal (User Equipment (UE)) controls transmission/reception processing based on information related to Quasi-Co-Location (QCL). Furthermore, it is studied for NR that one or a plurality of Transmission/Reception Points (TRPs) (multi TRPs) perform DL transmission (e.g., PDSCH transmission) for the UE by using one or a plurality of panels (multiple panels). However, past NR specifications do not take multiple panels/TRPs into account, and therefore it is not possible to appropriately determine QCL parameters in a case where the multiple panels/TRPs are used. Unless the QCL parameters can be appropriately determined, there is a risk of degradation of system performance such as a decrease of a throughput. It is therefore one of objects of the present disclosure to provide a terminal and a radio communication method that appropriately determine QCL parameters for multiple panels/TRPs. Solution to Problem The present invention is defined by the independent claims. Preferred embodiments are defined by the dependent claims. The scope of the present invention is defined by the scope of the appended claims. Advantageous Effects of Invention According to one aspect of the present disclosure, it is possible to appropriately determine Brief Description of Drawings Fig. 1 is a diagram illustrating one example of a QCL assumption of a DMRS port of a PDSCH.Figs. 2A to 2D are diagrams illustrating one example of a multi TRP scenario.Figs. 3A and 3B are diagrams illustrating one example of default QCLs of multiple PDSCHs.Fig. 4 is a diagram illustrating one example of a QCL time duration associated with a CORESET for single DCI and a QCL time duration associated with a CORESET for multiple pieces of DCI.Figs. 5A and 5B are diagrams illustrating one example of a QCL assumption according to a first aspect.Fig. 6 is a diagram illustrating one example of a QCL assumption according to a second aspect.Figs. 7A and 7B are diagrams illustrating one example of a QCL assumption according to a third aspect.Fig. 8 is a diagram illustrating one example of a QCL assumption according to a fourth aspect.Fig. 9 is a diagram illustrating one example of a schematic configuration of a radio communication system according to one embodiment.Fig. 10 is a diagram illustrating one example of a configuration of a base station according to the one embodiment.Fig. 11 is a diagram illustrating one example of a configuration of a user terminal according to the one embodiment.Fig. 12 is a diagram illustrating one example of hardware configurations of the base station and the user terminal according to the one embodiment. Description of Embodiments (TCI and QCL) It is studied for NR to control UE's reception processing (e.g., at least one of reception, demapping, demodulation and decoding) and transmission processing (e.g., at least one of transmission, mapping, precoding, modulation and encoding) of at least one of a signal and a channel (that are expressed as a signal/channel) based on a Transmission Configuration Indication state (TCI state). The TCI state may indicate an element that is applicable to a downlink signal/channel. An element corresponding to a TCI state applied to an uplink signal/channel may be expressed as a spatial relation. The TCI state is information related to Quasi-Co-Location (QCL) of a signal/channel, and may be referred to as, for example, a spatial reception parameter or spatial relation information. The TCI state may be configured to the UE per channel or per signal. QCL is an index that indicates a statistical