User terminal and radio communication method
地域：
Tokyo
摘要
A user terminal according to one aspect of the present disclosure includes: a reception section which monitors a first downlink control channel for cross-carrier scheduling in a first cell; and a control section which assumes that transmission configuration indication (TCI) field information indicating whether a TCI field exists in downlink control information is set to be enabled when a downlink shared channel of a second cell is scheduled by the downlink control information in the first downlink control channel and the second cell is different from the first cell. According to one aspect of the present disclosure, the information about the QCL can be appropriately determined when the user terminal configures the cross-carrier scheduling.
說明書
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The present disclosure relates to a user terminal and a radio communication method in a next-generation mobile communication system.
In a universal mobile telecommunications system (UMTS) network, specifications of long term evolution (LTE) have been drafted for the purpose of further increasing a data rate, providing low latency, and the like (see Non Patent Literature 1). Further, the specifications of LTE-Advanced (third generation partnership project (3GPP) Release. (Rel.) 10 to 14) have been drafted for the purpose of further increasing capacity and advancement of LTE (3GPP Rel. 8 and 9).
Successor systems to LTE (e.g., also referred to as 5th generation mobile communication system (5G), 5G+ (plus), new radio (NR), or 3GPP Rel. 15 or later) are also being studied.
In an existing LTE system (e.g., LTE Rel. 8 to 14), a user terminal (user equipment (UE)) controls transmission of an uplink shared channel (e.g., physical uplink shared channel (PUSCH)) based on downlink control information (DCI).
- 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, 2010
權利要求
The invention claimed is:1. A terminal comprising:a receiver that receives, in a physical downlink control channel (PDCCH) of a first cell, downlink control information (DCI) scheduling a downlink shared channel (PDSCH) of a second cell that is different from the first cell; and a processor that, when a control resource set (CORESET) associated with a search space set for cross-carrier scheduling is configured, assumes that transmission configuration indication (TCI) field information indicating whether the TCI field is present or absent in the DCI is set as enabled, wherein the processor controls reception of the PDCCH of the first cell and reception of the PDSCH of the second cell using a same TCI state. 2. The terminal according to claim 1 , wherein when one or more TCI states configured for the second cell include information indicating a quasi-co-location (QCL) type D parameter, the processor assumes that a time offset between reception of the DCI and the PDSCH is larger than or equal to a threshold value. 3. The terminal according to claim 1 , wherein the processor uses, for QCL assumption of the PDSCH, a TCI state with a lowest ID in an active bandwidth part (BWP) of the second cell. 4. A radio communication method for a terminal, comprising:receiving, in a physical downlink control channel (PDCCH) of a first cell, downlink control information (DCI) scheduling a downlink shared channel (PDSCH) of a second cell that is different from the first cell; and when a control resource set (CORESET) associated with a search space set for cross-carrier scheduling is configured, assumes that a transmission configuration indication (TCI) field information indicating whether the TCI field is present or absent in the DCI is set as enabled, and controlling reception of the PDCCH of the first cell and reception of the PDSCH of the second cell using a same TCI state. 5. A base station comprising:a transmitter that transmits, to a terminal, in a physical downlink control channel (PDCCH) of a first cell, downlink control information (DCI) scheduling a downlink shared channel (PDSCH) of a second cell that is different from the first cell; and a processor that, when a control resource set (CORESET) associated with a search space set for cross-carrier scheduling is configured in the terminal, assumes that a transmission configuration indication (TCI) field information indicating whether the TCI field is present or absent in the DCI is set as enabled, wherein the processor instructs the terminal to use a same TCI state for reception of the PDCCH of the first cell and reception of the PDSCH of the second cell. 6. A system comprising a terminal and a base station, wherein the terminal comprises:a receiver that receives, in a physical downlink control channel (PDCCH) of a first cell, downlink control information (DCI) scheduling a downlink shared channel (PDSCH) of a second cell that is different from the first cell; and a processor that, when a control resource set (CORESET) associated with a search space set for cross-carrier scheduling is configured, assumes that a transmission configuration indication (TCI) field information indicating whether the TCI field is present or absent in the DCI is set as enabled, wherein the processor controls reception of the PDCCH of the first cell and reception of the PDSCH of the second cell using a same TCI state, and the base station comprises:a transmitter that transmits the DCI.
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