# US 10,321,469 B2 · Terminal device, integrated circuit, and radio communication method

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- Number: US 10,321,469 B2
- Document ID: US10321469B2
- Status: Granted
- Kind: B2
- Application number: 15/310,498
- Filed: 2015-05-14
- Published: 2017-03-23
- Granted: 2019-06-11
- Earliest claimed: 2014-05-16
- Assignees: Sharp Kabushiki Kaisha
- Applicants: Sharp Kabushiki Kaisha
- Inventors: Kazunari Yokomakura; Shoichi Suzuki; Tatsushi Aiba; Hiroki Takahashi; Kimihiko Imamura
- Web page: https://patentgrep.com/patent/US10321469B2

## CPC

- H04L 1/1854: {Scheduling and prioritising arrangements}
- H04W 72/542: using measured or perceived quality
- H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports}
- H04W 72/04: Wireless resource allocation
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- H04L 1/0026: {Transmission of channel quality indication}
- H04L 1/1864: {ARQ related signaling (H04L1/1607 takes precedence)}
- H04W 72/0446: Resources in time domain, e.g. slots or frames
- H04W 88/02: Terminal devices
- 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 mobile station device (1) includes a measurement unit (1059) that performs interference measurement to calculate channel state information in a first subframe set or a second subframe set to which a channel state information reference resource belongs. A subframe which is valid as the channel state information reference resource and corresponding to report of periodic channel state information is decided based on first UL-DL configuration and third UL-DL configuration. A subframe which is valid as the channel state information reference resource and corresponding to report of aperiodic channel state information is decided based on second UL-DL configuration.

## Claims

### Claim 1

A terminal device comprising:
reception circuitry that receives a signal of a higher layer including first information used to instruct two subframe sets and receives downlink control information including information for requesting report of channel state information regarding one subframe set of the two subframe sets; and
transmission circuitry that reports the channel state information derived with reference to a channel state information reference resource using subframe n, wherein
the channel state information reference resource is defined by one downlink subframe n−nCQI_ref or one special subframe n−nCQI_ref on a time domain,
in a case in which the two subframe sets are not configured, nCQI_ref is a value in which the channel state information reference resource is present in a valid downlink subframe or a valid special subframe which is the same as a downlink subframe or a special subframe with which the information included in the downlink control information is received,
in a case in which downlink subframe n−4 or special subframe n−4 in which the two subframe sets are configured and with which the information included in the downlink control information is received corresponds to a valid downlink subframe or a valid special subframe, nCQI_ref is 4,
in a case in which the downlink subframe n−4 or the special subframe n−4 in which the two subframe sets are configured and with which the information included in the downlink control information is received does not correspond to the valid downlink subframe or the valid special subframe, nCQI_ref is a value greater than 4 in which the channel state information reference resource is present in the valid downlink subframe or the valid special subframe, and
the channel state information reference resource belongs to one of the two subframe sets, but not to both of the two subframe sets.

### Claim 2 (depends on 1)

The terminal device according to claim 1,
wherein the valid downlink subframe or the special subframe corresponds to the one subframe set.

### Claim 3 (depends on 1)

The terminal device according to claim 1,
wherein UL-DL configuration used to assign reference UL-DL configuration at a downlink HARQ timing is performed.

### Claim 4

A communication method for a terminal device, the method comprising:
receiving a signal of a higher layer including first information used to instruct two subframe sets and receiving downlink control information including information for requesting report of channel state information regarding one subframe set of the two subframe sets; and
reporting the channel state information derived with reference to a channel state information reference resource using subframe n, wherein
the channel state information reference resource is defined by one downlink subframe n−nCQI_ref or one special subframe n−nCQI_ref on a time domain,
in a case in which the two subframe sets are not configured, nCQI_ref is a value in which the channel state information reference resource is present in a valid downlink subframe or a valid special subframe which is the same as a downlink subframe or a special subframe with which the information included in the downlink control information is received,
in a case in which downlink subframe n−4 or special subframe n−4 in which the two subframe sets are configured and with which the information included in the downlink control information is received corresponds to a valid downlink subframe or a valid special subframe, nCQI_ref is 4,
in a case in which the downlink subframe n−4 or the special subframe n−4 in which the two subframe sets are configured and with which the information included in the downlink control information is received does not correspond to the valid downlink subframe or the valid special subframe, nCQI_ref is a value greater than 4 in which the channel state information reference resource is present in the valid downlink subframe or the valid special subframe, and
the channel state information reference resource belongs to one of the two subframe sets, but not to both of the two subframe sets.

### Claim 5 (depends on 4)

The communication method according to claim 4,
wherein the valid downlink subframe or the special subframe corresponds to the one subframe set.

### Claim 6 (depends on 4)

The communication method according to claim 4,
wherein UL-DL configuration used to assign reference UL-DL configuration at a downlink HARQ timing is performed.

### Claim 7

An integrated circuit mounted on a terminal device and causing the terminal device to perform:
a function of receiving a signal of a higher layer including first information used to instruct two subframe sets and receiving downlink control information including information for requesting report of channel state information regarding one subframe set of the two subframe sets; and
a function of reporting the channel state information derived with reference to a channel state information reference resource using subframe n, wherein
the channel state information reference resource is defined by one downlink subframe n−nCQI_ref or one special subframe n−nCQI_ref on a time domain,
in a case in which the two subframe sets are not configured, nCQI_ref is a value in which the channel state information reference resource is present in a valid downlink subframe or a valid special subframe which is the same as a downlink subframe or a special subframe with which the information included in the downlink control information is received,
in a case in which downlink subframe n−4 or special subframe n−4 in which the two subframe sets are configured and with which the information included in the downlink control information is received corresponds to a valid downlink subframe or a valid special subframe, nCQI_ref is 4,
in a case in which the downlink subframe n−4 or the special subframe n−4 in which the two subframe sets are configured and with which the information included in the downlink control information is received does not correspond to the valid downlink subframe or the valid special subframe, nCQI_ref is a value greater than 4 in which the channel state information reference resource is present in the valid downlink subframe or the valid special subframe, and
the channel state information reference resource belongs to one of the two subframe sets, but not to both of the two subframe sets.

### Claim 8 (depends on 7)

The integrated circuit according to claim 7,
wherein the valid downlink subframe or the special subframe corresponds to the one subframe set.

### Claim 9 (depends on 7)

The integrated circuit according to claim 7,
wherein UL-DL configuration used to assign reference UL-DL configuration at a downlink HARQ timing is performed.