# US 2022/0286174 A1 · User terminal and radio communication method

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- Number: US 2022/0286174 A1
- Document ID: US20220286174A1
- Status: Published application
- Kind: A1
- Application number: 17/608,104
- Filed: 2019-05-02
- Published: 2022-09-08
- Earliest claimed: 2019-05-02
- Assignees: Ntt Docomo, Inc.
- Applicants: Ntt Docomo, Inc.
- Inventors: Masaya Okamura; Yuki Matsumura; Hiroki Harada
- Web page: https://patentgrep.com/patent/US20220286174A1

## CPC

- H04B 7/0623: {Auxiliary parameters, e.g. power control [PCB] or not acknowledged commands [NACK], used as feedback information}
- H04B 7/0628: {Diversity capabilities}
- H04B 7/0404: the mobile station comprising multiple antennas, e.g. to provide uplink diversity
- H04B 7/0456: Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
- H04B 7/0639: {Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection}
- H04W 52/367: {Power values between minimum and maximum limits, e.g. dynamic range}
- H04W 52/42: in systems with time, space, frequency or polarisation diversity
- H04W 8/24: Transfer of terminal data
- H04B: TRANSMISSION
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

A user terminal according to one aspect of the present disclosure includes: a control section that, when capability information that indicates that full power transmission is supported is transmitted, and when a non coherent or partial and non coherent codebook subsets are configured, assumes that downlink control information can indicate a fully coherent codebook subset; and a transmitting section that performs the full power transmission by applying the fully coherent codebook subset to uplink transmission based on the downlink control information. According to one aspect of the present disclosure, it is possible to appropriately control full power transmission.

## Claims

### Claim at position 1

-7. (canceled)

### Claim 8

A terminal comprising:
a transmitter that transmits capability information indicating that full power transmission is supported;
a receiver that receives a higher layer parameter for configuring partial-coherent and non-coherent codebook subsets and downlink control information indicating a codebook to be applied to uplink transmission; and
a processor that controls, based on association between a precoding information and number of layers field included in the downlink control information and a Transmitted Precoding Matrix Indicator (TPMI), to perform the full power transmission by applying, to the uplink transmission, a fully coherent codebook corresponding to TPMI indicated by a value of the field,
wherein a plurality of possible values are provided in the field, some of which indicate TPMIs corresponding to mutually different fully coherent codebooks.

### Claim 9 (depends on 8)

The terminal according to claim 8, wherein when receiving the higher layer parameter for configuring the partial-coherent and non-coherent codebook subsets or when receiving the higher layer parameter for configuring the non-coherent codebook subsets only, the value in the field included in the downlink control information indicates the TPMI corresponding to at least one same fully coherent codebook.

### Claim 10

A base station comprising:
a receiver that receives capability information indicating that full power transmission is supported;
a transmitter that transmits a higher layer parameter for configuring partial-coherent and non-coherent codebook subsets and downlink control information indicating a codebook to be applied to uplink transmission; and
a processor that controls to receive uplink full power transmission to which, based on association between a precoding information and number of layers field included in the downlink control information and a Transmitted Precoding Matrix Indicator (TPMI), a fully coherent codebook corresponding to TPMI indicated by a value of the field is applied,
wherein a plurality of possible values are provided in the field, some of which indicate TPMIs corresponding to mutually different fully coherent codebooks.

### Claim 11

A radio communication method for a terminal, comprising:
transmitting capability information indicating that full power transmission is supported;
receiving a higher layer parameter for configuring partial-coherent and non-coherent codebook subsets and downlink control information indicating a codebook to be applied to uplink transmission; and
controlling, based on association between a precoding information and number of layers field included in the downlink control information and a Transmitted Precoding Matrix Indicator (TPMI), to perform the full power transmission by applying, to the uplink transmission, a fully coherent codebook corresponding to TPMI indicated by a value of the field,
wherein a plurality of possible values are provided in the field, some of which indicate TPMIs corresponding to mutually different fully coherent codebooks.

### Claim 12

A system comprising: a terminal; and a base station, wherein
the terminal comprises:
a transmitter that transmits capability information indicating that full power transmission is supported;
a receiver that receives a higher layer parameter for configuring partial-coherent and non-coherent codebook subsets and downlink control information indicating a codebook to be applied to uplink transmission; and
a processor that controls, based on association between a precoding information and number of layers field included in the downlink control information and a Transmitted Precoding Matrix Indicator (TPMI), to perform the full power transmission by applying, to the uplink transmission, a fully coherent codebook corresponding to TPMI indicated by a value of the field,
wherein a plurality of possible values are provided in the field, some of which indicate TPMIs corresponding to mutually different fully coherent codebooks; and
the base station comprises:
a receiver that receives the capability information;
a transmitter that transmits the higher layer parameter and the downlink control information; and
a processor that controls to receive uplink full power transmission.