Patent ID: 9374192
Filing Date: 2016-06-21
CPC Classification: H04L,H04W

Claim Text:
1. A base station apparatus which communicates with a mobile station apparatus using a plurality of downlink component carriers, the base station apparatus comprising: a transmitting unit configured to transmit, to the mobile station apparatus, control information on a physical downlink control channel in a downlink component carrier, the control information being used for scheduling of a physical uplink shared channel in an uplink component carrier, the downlink component carrier being one of the plurality of downlink component carriers; and a receiving unit configured to receive, from the mobile station apparatus, uplink data on the physical uplink shared channel in the uplink component carrier scheduled by using the control information, wherein the transmitting unit is configured to transmit, to the mobile station apparatus, a positive acknowledgment or a negative acknowledgment for the uplink data, the positive acknowledgment or the negative acknowledgment being transmitted on a physical hybrid ARQ indicator channel in a same downlink component carrier as the downlink component carrier in which the control information is transmitted on the physical downlink control channel.