# US 2021/0243761 A1 · User terminal and radio communication method

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- Number: US 2021/0243761 A1
- Document ID: US20210243761A1
- Status: Published application
- Kind: A1
- Application number: 16/972,757
- Filed: 2018-06-08
- Published: 2021-08-05
- Earliest claimed: 2018-06-08
- Assignees: Ntt Docomo, Inc.
- Applicants: Ntt Docomo, Inc.
- Inventors: Shohei Yoshioka; Yuki Matsumura; Satoshi Nagata; Huiling Li
- Web page: https://patentgrep.com/patent/US20210243761A1

## CPC

- H04L 27/26025: {Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking (allocating sub-channels of the transmission path H04L5/003)}
- H04W 72/53: based on regulatory allocation policies
- H04B 7/0626: {Channel coefficients, e.g. channel state information [CSI]}
- H04L 1/0026: {Transmission of channel quality indication}
- H04L 1/0027: {Scheduling of signalling, e.g. occurrence thereof}
- H04L 5/0057: {Physical resource allocation for CQI}
- H04L 5/0094: {Indication of how sub-channels of the path are allocated}
- H04L 5/0096: {Indication of changes in allocation}
- H04L 27/2647: {Arrangements specific to the receiver only (equalisation H04L27/01)}
- H04W 72/0446: Resources in time domain, e.g. slots or frames
- H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- H04W 72/542: using measured or perceived quality
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04B: TRANSMISSION

## Abstract

To appropriately control the deactivation of one or more activated SP-CSI reporting. In accordance with one aspect of the present disclosure, a user terminal has a receiving section that receives one or more configuration information regarding semi-persistent channel state information (CSI) reporting using an uplink shared channel, and a control section that controls at least one of deactivations of activated semi-persistent CSI reporting based on downlink control information (DCI) when one or more semi-persistent CSI reporting each corresponding to the one or more configuration information are activated.

## Claims

### Claim at position 1

-6. (canceled)

### Claim 7

A terminal comprising:
a receiving section that receives configuration information regarding semi-persistent channel state information (SP-CSI) reporting using an uplink shared channel; and
a control section that, upon detecting a downlink control information (DCI) for deactivation of the SP-CSI reporting, controls to constantly deactivate a single SP-CSI reporting out of one or more SP-CSI reporting corresponding to the configuration information,
wherein the single SP-CSI reporting corresponds to a value of a CSI request field in the DCI.

### Claim 8

A radio communication method for a terminal, comprising:
receiving configuration information regarding semi-persistent channel state information (SP-CSI) reporting using an uplink shared channel; and
controlling, upon detecting a downlink control information (DCI) for deactivation of the SP-CSI reporting, to constantly deactivate a single SP-CSI reporting out of one or more SP-CSI reporting corresponding to the configuration information,
wherein the single SP-CSI reporting corresponds to a value of a CSI request field in the DCI.

### Claim 9

A base station comprising:
a transmitting section that transmits configuration information regarding semi-persistent channel state information (SP-CSI) reporting using an uplink shared channel; and
a control section that controls to transmit a downlink control information (DCI), including a CSI request field, for deactivation of the SP-CSI reporting to constantly deactivate a single SP-CSI reporting out of one or more SP-CSI reporting corresponding to the configuration information.

### Claim 10

A system comprising a base station and a terminal, wherein:
the base station comprises:
a transmitting section that transmits configuration information; and
a control section that controls to transmit a downlink control information (DCI), including a CSI request field, for deactivation of the SP-CSI reporting to constantly deactivate a single SP-CSI reporting out of one or more SP-CSI reporting corresponding to the configuration information, and
the terminal comprises:
a receiving section that receives the configuration information regarding semi-persistent channel state information (SP-CSI) reporting using an uplink shared channel; and
a control section that, upon detecting the DCI, controls to constantly deactivate the single SP-CSI reporting out of the one or more SP-CSI reporting,
wherein the single SP-CSI reporting corresponds to a value of the CSI request field in the DCI.