# US 11,910,384 B2 · Terminal apparatus, base station apparatus, and communication method

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- Number: US 11,910,384 B2
- Document ID: US11910384B2
- Status: Granted
- Kind: B2
- Application number: 17/277,778
- Filed: 2019-09-26
- Published: 2021-11-11
- Granted: 2024-02-20
- Earliest claimed: 2018-09-27
- Assignees: Sharp Kabushiki Kaisha
- Applicants: Sharp Kabushiki Kaisha
- Inventors: Tomoki Yoshimura; Shoichi Suzuki; Toshizo Nogami; Wataru Ouchi; Taewoo Lee; Huifa Lin
- Web page: https://patentgrep.com/patent/US11910384B2

## CPC

- H04W 72/1273: of downlink data flows
- H04L 1/1812: Hybrid protocols; Hybrid automatic repeat request [HARQ]
- H04L 1/1819: {with retransmission of additional or different redundancy}
- H04L 1/1896: {ARQ related signaling}
- H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals}
- H04L 5/0094: {Indication of how sub-channels of the path are allocated}
- H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA
- H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT}
- H04L 5/0046: {Determination of the number of bits transmitted on different sub-channels}
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

A terminal apparatus includes a receiver configured to monitor a PDCCH with a DCI format on an active downlink BWP in a serving cell in a Secondary Cell Group (SCG), the DCI format being used for scheduling a PDSCH, and receive the PDSCH on the downlink BWP, and a transmitter configured to transmit a HARQ-ACK on a PUCCH. A value NRIV of a frequency domain resource allocation field included in the DCI format is equal to NsizeBWP*(LRBs−1)+RBstart, in a case that LRBS−1 is equal to or smaller than floor(NsizeBWP*2), the value NRIV is equal to NsizeBWP*(NsizeBWP−LRBs+1)+(NsizeBWP−1−RBstart) in a case that LRBS−1 is larger than floor(NsizeBWP/2), the floor(NsizeBWP/2) represents a largest integer within a range that does not exceed NsizeBWP/2, the RBstart is a starting resource block for allocation of the PDSCH, the LRBs is a number of resource blocks allocated to the PDSCH, and the NsizeBWP is given based on the number of resource blocks in an initial downlink BWP configured by a first parameter in a case that the DCI format is detected in a common search space.

## Claims

### Claim 1

A terminal apparatus comprising:
a receiver configured to monitor a Physical Downlink Control CHannel (PDCCH) with a Downlink Control Information (DCI) format on an active downlink BandWidth Part (BWP) in a serving cell, the DCI format being used for scheduling a Physical Downlink Shared CHannel (PDSCH), and receive the PDSCH on the active downlink BWP; and
a transmitter configured to transmit a Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK) on a Physical Uplink Control CHannel (PUCCH), wherein
a value NRIV of a frequency domain resource allocation field included in the DCI format is equal to NsizeBWP*(LRBs−1)+RBstart, in a case that LRBs−1 is equal to or smaller than floor(NsizeBWP/2),
the value NRIV is equal to NsizeBWP*(NsizeBWP−LRBs+1)+(NsizeBWP−1−RBstart) in a case that LRBs31 1 is larger than floor(NsizeBWP/2),
the floor(NsizeBWP/2) is a largest integer within a range that does not exceed the NsizeBWP/2,
the RBstart is a starting resource block for allocation of the PDSCH,
the LRBs is a number of allocated resource blocks for the PDSCH,
the NsizeBWP is given based on whether or not a control resource set with an index O is configured,
the NsizeBWP is given based on a number of resource blocks for an initial downlink BWP configured by a first parameter in a case that the control resource set with the index O is not configured and the DCI format is detected in a common search space, and
the NsizeBWP is given based on a number of resource blocks for the control resource set with the index O in a case that the control resource set with the index O is configured by a second parameter different from the first parameter and the DCI format is detected in the common search space.

### Claim 2

A base station apparatus comprising:
a transmitter configured to transmit a Physical Downlink Control CHannel (PDCCH) with a Downlink Control Information (DCI) format on an active downlink BandWidth Part (BWP) in a serving cell, the DCI format being used for scheduling a Physical Downlink Shared CHannel (PDSCH), and transmit the PDSCH on the active downlink BWP; and
a receiver configured to receive a Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK) on a Physical Uplink Control CHannel (PUCCH), wherein
a value NRIV of a frequency domain resource allocation field included in the DCI format is equal to NsizeBWP*(LRBs−1)+RBstart, in a case that LRBs−1 is equal to or smaller than floor(NsizeBWP/2),
the value NRIV is equal to NsizeBWP*(NsizeBWP−LRBs+1)+(NsizeBWP−1−RBstart) in a case that LRBs−1 is larger than floor(NsizeBWP/2),
the floor(NsizeBWP/2) is a largest integer within a range that does not exceed the NsizeBWP/2,
the RBstart is a starting resource block for allocation of the PDSCH,
the LRBs is a number of allocated resource blocks for the PDSCH,
the NsizeBWP is given based on whether or not a control resource set with an index O is configured,
the NsizeBWP is given based on a number of resource blocks for an initial downlink BWP configured by a first parameter in a case that the control resource set with the index O is not configured and the DCI format is detected in a common search space, and
the NsizeBWP is given based on a number of resource blocks for the control resource set with the index O in a case that the control resource set with the index O is configured by a second parameter different from the first parameter and the DCI format is detected in the common search space.

### Claim 3

A communication method used for a terminal apparatus, the communication method comprising:
monitoring a Physical Downlink Control CHannel (PDCCH) with a Downlink Control Information (DCI) format on an active downlink BandWidth Part (BWP) in a serving cell, the DCI format being used for scheduling a Physical Downlink Shared CHannel (PDSCH);
receiving the PDSCH on the active downlink BWP; and
transmitting a Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK) on a Physical Uplink Control CHannel (PUCCH), wherein
a value NRIV of a frequency domain resource allocation field included in the DCI format is equal to NsizeBWP*(LRBs−1)+RBstart, in response to LRBs−1 being equal to or smaller than floor(NsizeBWP/2),
the value NRIV is equal to NsizeBWP*(NsizeBWP−LRBs+1)+(NsizeBWP−1−RBstart) in response to LRBs−1 being larger than floor(NsizeBWP/2),
the floor(NsizeBWP/2) is a largest integer within a range that does not exceed the NsizeBWP/2,
the RBstart is a starting resource block for allocation of the PDSCH,
the LRBs is a number of allocated resource blocks for the PDSCH,
the NsizeBWP is given based on whether or not a control resource number of resource set with an index O is configured,
the NsizeBWP is given based on a number of resource blocks for an initial downlink BWP configured by a first parameter in response to the control resource set with the index O being not configured and the DCI format being detected in a common search space, and
the NsizeBWP is given based on a number of resource blocks for the control resource set with the index O in response to the control resource set with the index O being configured by a second parameter different from the first parameter and the DCI format is being detected in a common search space.