# US 10,455,572 B2 · Mobile communication system, base station apparatus, mobile station apparatus and communication method

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- Number: US 10,455,572 B2
- Document ID: US10455572B2
- Status: Granted
- Kind: B2
- Application number: 15/959,231
- Filed: 2018-04-22
- Published: 2018-08-23
- Granted: 2019-10-22
- Earliest claimed: 2010-03-19
- Assignees: Guangdong Oppo Mobile Telecommunications Corp., Ltd.
- Applicants: Guangdong Oppo Mobile Telecommunications Corp., Ltd.
- Inventors: Tatsushi Aiba; Shoichi Suzuki; Toshizo Nogami
- Web page: https://patentgrep.com/patent/US10455572B2

## CPC

- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- H04L 5/001: {the frequencies being arranged in component carriers}
- H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals}
- H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports}
- H04W 48/08: Access restriction or access information delivery, e.g. discovery data delivery (signalling during connection H04W76/00)
- H04W 88/02: Terminal devices
- H04W 88/08: Access point devices
- 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 mobile station (MS) communicates with a base station (BS) by a carrier aggregation using a plurality of downlink component carriers (DCCs). The MS receives on one or more activated DCCs. The MS receives using a PDCCH on one of activated DCCs, from the BS, first information including an information field for requesting a transmission of channel state information (CSI), the first information being used for scheduling of a PUSCH. The MS transmits using the PUSCH in a first subframe on an uplink component carrier, to the BS, first CSI for more than one activated DCCs. The MS transmits using the PUSCH in a second subframe on the uplink component carrier, to the BS, second CSI for only one activated downlink component carrier. The transmission of the second CSI is scheduled by the first information received using the PDCCH on the only one activated downlink component carrier.

## Claims

### Claim 1

Mobile station apparatus configured to communicate with base station apparatus, the mobile station apparatus comprising:
receiving circuitry configured to:
receive on a plurality of downlink component carriers;
receive a radio resource control signal including first information indicating that a first downlink component carrier of the plurality of downlink component carriers is linked to an uplink component carrier; and
receive, via a physical downlink control channel, a downlink control information format including second information requesting a transmission of channel state information, the downlink control information format being used for scheduling of a physical uplink shared channel on the uplink component carrier; and
transmitting circuitry configured to:
in a case that the downlink control information format including the second information requesting the transmission of the channel state information is received, transmit, in a subframe, via the physical uplink shared channel on the uplink component carrier, channel state information for the first downlink component carrier based on the first information.

### Claim 2

Base station apparatus configured to communicate with mobile station apparatus, the base station apparatus comprising:
transmitting circuitry configured to:
transmit on a plurality of downlink component carriers;
transmit a radio resource control signal including first information indicating that a first downlink component carrier of the plurality of downlink component carriers is linked to an uplink component carrier; and
after the first information is transmitted, transmit, via a physical downlink control channel, a downlink control information format including second information requesting a transmission of channel state information, the downlink control information format being used for scheduling a physical uplink shared channel on the uplink component carrier; and
receiving circuitry configured to:
in a case that the downlink control information format including the second information requesting the transmission of the channel state information is transmitted, receive, in a subframe, via the physical uplink shared channel on the uplink component carrier, channel state information for the first downlink component carrier.

### Claim 3

A communication method of mobile station apparatus configured to communicate with base station apparatus, the communication method comprising:
receiving on a plurality of downlink component carriers;
receiving a radio resource control signal including first information indicating that a first downlink component carrier of the plurality of downlink component carriers is linked to an uplink component carrier;
receiving, via a physical downlink control channel, a downlink control information format including second information requesting a transmission of channel state information, the downlink control information format being used for scheduling of a physical uplink shared channel on the uplink component carrier; and
in a case that the downlink control information format including the second information requesting the transmission of the channel state information is received, transmitting, in a subframe, via the physical uplink shared channel on the uplink component carrier, channel state information for the first downlink component carrier based on the first information.

### Claim 4

A communication method of base station apparatus configured to communicate with mobile station apparatus, the communication method comprising:
transmitting a plurality of downlink component carriers;
transmit a radio resource control signal including first information indicating that a first downlink component carrier of the plurality of downlink component carriers is linked to an uplink component carrier;
after the first information is transmitted, transmitting, via a physical downlink control channel, a downlink control information format including second information requesting a transmission of channel state information, the downlink control information format being used for scheduling of a physical uplink shared channel on the uplink component carrier; and
in a case that the downlink control information format including the second information requesting the transmission of the channel state information is transmitted, receiving, in a subframe, via the physical uplink shared channel on the uplink component carrier, channel state information for the first downlink component carrier.