Communication method, mobile station apparatus, base station apparatus and mobile communication system

A base station apparatus that is configured to and/or programmed to communicate with a mobile station apparatus using a plurality of downlink component carriers,

• the plurality of downlink component carriers including a first downlink component carrier and a second downlink component carrier,
• the base station apparatus comprising:
• transmission circuitry configured to and/or programmed to transmit, to the mobile station apparatus, downlink control information using at least one physical downlink control channel on at least the first downlink component carrier;
• and
• reception circuitry configured to and/or programmed to receive, from the mobile station apparatus, Hybrid Automatic Repeat Request (HARQ) control information for a physical downlink shared channel transmission scheduled by using the physical downlink control channel, wherein
• the reception circuitry is configured to and/or programmed to receive, from the mobile station apparatus, the HARQ control information using a first physical uplink control channel resource and a first physical uplink control channel format in a case that the physical downlink shared channel transmission on the second downlink component carrier is scheduled by using the physical downlink control channel, and
• the reception circuitry is configured to and/or programmed to receive, from the mobile station apparatus, the HARQ control information using a second physical uplink control channel resource and a second physical uplink control channel format in a case that the physical downlink shared channel transmission only on the first downlink component carrier is scheduled by using the physical downlink control channel.

A communication method of a mobile station apparatus configured to and/or programmed to communicate with a base station apparatus using a plurality of downlink component carriers,

• the plurality of downlink component carriers including a first downlink component carrier and a second downlink component carrier,
• the communication method comprising:
• attempting to decode at least one physical downlink control channel on at least the first downlink component carrier;
• transmitting, to the base station apparatus, Hybrid Automatic Repeat Request (HARQ) control information for a physical downlink shared channel transmission indicated by a detection of the physical downlink control channel;
• transmitting, to the base station apparatus, the HARQ control information using a first physical uplink control channel resource and a first physical uplink control channel format in a case that the physical downlink shared channel transmission on the second downlink component carrier is indicated by the detection of the physical downlink control channel;
• and
• transmitting, to the base station apparatus, the HARQ control information using a second physical uplink control channel resource and a second physical uplink control channel format in a case that the physical downlink shared channel transmission only on the first downlink component carrier is indicated by the detection of the physical downlink control channel.

A communication method of a base station apparatus configured to and/or programmed to communicate with a mobile station apparatus using a plurality of downlink component carriers,

• the plurality of downlink component carriers including a first downlink component carrier and a second downlink component carrier,
• the communication method comprising:
• transmitting, to the mobile station apparatus, downlink control information using at least one physical downlink control channel on at least the first downlink component carrier;
• receiving, from the mobile station apparatus, Hybrid Automatic Repeat Request (HARQ) control information for a physical downlink shared channel transmission scheduled by using the physical downlink control channel;
• receiving, from the mobile station apparatus, the HARQ control information using a first physical uplink control channel resource and a first physical uplink control channel format in a case that the physical downlink shared channel transmission on the second downlink component carrier is scheduled by using the physical downlink control channel;
• and
• receiving, from the mobile station apparatus, the HARQ control information using a second physical uplink control channel resource and a second physical uplink control channel format in a case that the physical downlink shared channel transmission only on the first downlink component carrier is scheduled by using the physical downlink control channel.