# US 11,910,417 B2 · Base station device, terminal device, and communication method

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 11,910,417 B2
- Document ID: US11910417B2
- Status: Granted
- Kind: B2
- Application number: 17/264,767
- Filed: 2019-07-26
- Published: 2021-09-23
- Granted: 2024-02-20
- Earliest claimed: 2018-07-31
- Assignees: Sharp Kabushiki Kaisha; FG Innovation Company Limited
- Applicants: Sharp Kabushiki Kaisha; FG Innovation Company Limited
- Inventors: Liqing Liu; Shohei Yamada; Hiroki Takahashi; Masayuki Hoshino; Hidekazu Tsuboi
- Web page: https://patentgrep.com/patent/US11910417B2

## CPC

- H04L 5/0094: {Indication of how sub-channels of the path are allocated}
- H04W 72/53: based on regulatory allocation policies
- H04L 5/001: {the frequencies being arranged in component carriers}
- H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH}
- H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals}
- H04L 27/2602: {Signal structure}
- 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 48/12: using downlink control channel
- 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)

## Abstract

A terminal apparatus of the present invention receives setting of an initial DL BWP by using an RRC message, the setting of the initial DL BWP comprises setting a first parameter and a second parameter of a CORESET #0, a value of an identifier of the CORESET #0 is 0, the first parameter represents the size of the CORESET #0, and the second parameter represents the size of the initial DL BWP. The terminal apparatus of the present invention receives a DCI format that schedules a PDSCH in an active DL BWP, and identifies, based on a field in the DCI format, a resource block set to which the PDSCH is allocated. A value of the field is determined based on the size of the DL BWP, the start resource block, and the number of consecutively allocated resource blocks. The size of the DCI format in a USS is determined based on the size of the CORESET #0, and when the field is applied to the active DL BWP, the size of the DL BWP is the size of the CORESET #0.

## Claims

### Claim 1

A terminal apparatus comprising:
a receiving portion configured to
receive a setting of an initial downlink (DL) bandwidth part (BWP) via a radio resource control (RRC) message, and
receive a downlink control information (DCI) format that schedules a physical downlink shared channel (PDSCH) in an active DL BWP; and
a control portion configured to identify, in a field in the DCI format, a value corresponding to a resource block set to which the PDSCH is allocated and which is indicated by a start resource block and a number of consecutively allocated resource blocks, wherein
the setting of the initial DL BWP comprises setting a first parameter and a second parameter of a control resource set (CORESET) #0,
a value of an identifier of the CORESET #0 is 0,
the first parameter represents a size of the CORESET #0,
the second parameter represents a size of the initial DL BWP,
a serving cell is set with the initial DL BWP and an additional DL BWP,
one of the initial DL BWP and the additional DL BWP is activated as the active DL BWP,
the value identified by the control portion is determined based on a size of a DL BWP, the start resource block, and the number of the consecutively allocated resource blocks,
a size of the DCI format in a common search space (CSS) is determined based on the size of the CORESET #0, and when the field in the DCI format is applied to the active DL BWP, the size of the DL BWP is the size of the CORESET #0, and
a size of the DCI format in a user equipment (UE)-specific search space (USS) is determined based on a size of the active DL BWP, and when the field in the DCI format is applied to the active DL BWP, the size of the DL BWP is the size of the active DL BWP.

### Claim 2 (depends on 1)

The terminal apparatus according to claim 1, wherein
the value identified by the control portion is further determined based on a first value,
when the size of the active DL BWP is greater than the size of the CORESET #0, the first value is determined based on the size of the active DL BWP and the size of the CORESET #0, and
when the size of the active DL BWP is less than the size of the CORESET #0, the first value is 1.

### Claim 3 (depends on 1)

The terminal apparatus according to claim 1, wherein
the initial DL BWP is activated as the active DL BWP, and
the size of the active DL BWP is the size of the initial DL BWP.

### Claim 4 (depends on 1)

The terminal apparatus according to claim 1, wherein
the setting of the first parameter of the CORESET #0 does not comprise a setting of a BWP other than the initial DL BWP,
a field of the first parameter is 4 bits, and
the initial DL BWP comprises the CORESET #0 in a frequency domain.

### Claim 5

A base station apparatus comprising:
a transmitting portion configured to
transmit a setting of an initial downlink (DL) bandwidth part (BWP) via a radio resource control (RRC) message, and
transmit a downlink control information (DCI) format that schedules a physical downlink shared channel (PDSCH) in an active DL BWP; and
a control portion configured to set, in a field in the DCI format, a value corresponding to a resource block set to which the PDSCH is allocated and which is indicated by a start resource block and a number of consecutively allocated resource blocks, wherein
the setting of the initial DL BWP comprises setting a first parameter and a second parameter of a control resource set (CORESET) #0,
a value of an identifier of the CORESET #0 is 0,
the first parameter represents a size of the CORESET #0,
the second parameter represents a size of the initial DL BWP,
a serving cell is set with the initial DL BWP and an additional DL BWP,
one of the initial DL BWP and the additional DL BWP is activated as the active DL BWP,
the value set by the control portion is determined based on a size of a DL BWP, the start resource block, and the number of the consecutively allocated resource blocks,
a size of the DCI format in a common search space (CSS) is determined based on the size of the CORESET #0, and when the field in the DCI format is applied to the active DL BWP, the size of the DL BWP is the size of the CORESET #0, and
a size of the DCI format in a user equipment (UE)-specific search space (USS) is determined based on a size of the active DL BWP, and when the field in the DCI format is applied to the active DL BWP, the size of the DL BWP is the size of the active DL BWP.

### Claim 6 (depends on 5)

The base station apparatus according to claim 5, wherein
the value set by the control portion is further determined based on a first value,
when the size of the active DL BWP is greater than the size of the CORESET #0, the first value is determined based on the size of the active DL BWP and the size of the CORESET #0, and
when the size of the active DL BWP is less than the size of the CORESET #0, the first value is 1.

### Claim 7 (depends on 5)

The base station apparatus according to claim 5, wherein
the initial DL BWP is activated as the active DL BWP, and
the size of the active DL BWP is the size of the initial DL BWP.

### Claim 8 (depends on 5)

The base station apparatus according to claim 5, wherein
the setting of the first parameter of the CORESET #0 does not comprise a setting of a BWP other than the initial DL BWP,
a field of the first parameter is 4 bits, and
the initial DL BWP comprises the CORESET #0 in a frequency domain.

### Claim 9

A communication method for a terminal apparatus, the communication method comprising:
receiving a setting of an initial downlink (DL) bandwidth part (BWP) via a radio resource control (RRC) message;
receiving a downlink control information (DCI) format that schedules a physical downlink shared channel (PDSCH) in an active DL BWP; and
identifying, in a field in the DCI format, a value corresponding to a resource block set to which the PDSCH is allocated and which is indicated by a start resource block and a number of consecutively allocated resource blocks, wherein
the setting of the initial DL BWP comprises setting a first parameter and a second parameter of a control resource set (CORESET) #0,
a value of an identifier of the CORESET #0 is 0,
the first parameter represents a size of the CORESET #0,
the second parameter represents a size of the initial DL BWP,
a serving cell is set with the initial DL BWP and an additional DL BWP,
one of the initial DL BWP and the additional DL BWP is activated as the active DL BWP,
the identified value is determined based on a size of a DL BWP, the start resource block, and the number of the consecutively allocated resource blocks,
a size of the DCI format in a common search space (CSS) is determined based on the size of the CORESET #0, and when the field in the DCI format is applied to the active DL BWP, the size of the DL BWP is the size of the CORESET #0, and
a size of the DCI format in a user equipment (UE)-specific search space (USS) is determined based on a size of the active DL BWP, and when the field in the DCI format is applied to the active DL BWP, the size of the DL BWP is the size of the active DL BWP.

### Claim 10 (depends on 9)

The communication method according to claim 9, wherein
the identified value is further determined based on a first value,
when the size of the active DL BWP is greater than the size of the CORESET #0, the first value is determined based on the size of the active DL BWP and the size of the CORESET #0, and
when the size of the active DL BWP is less than the size of the CORESET #0, the first value is 1.

### Claim 11 (depends on 9)

The communication method according to claim 9, wherein
the initial DL BWP is activated as the active DL BWP, and
the size of the active DL BWP is the size of the initial DL BWP.

### Claim 12 (depends on 9)

The communication method according to claim 9, wherein
setting the first parameter of the CORESET #0 does not comprise a setting of a BWP other than the initial DL BWP,
a field of the first parameter is 4 bits, and
the initial DL BWP comprises the CORESET #0 in a frequency domain.