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

摘要

To specify flexibly one or more downlink component carriers for which a mobile station apparatus generates channel state information when performing communication using a plurality of component carriers complexly. A base station apparatus transmits to the mobile station apparatus a downlink control information format in which an information bit set to a value corresponding to one or more downlink component carriers requesting to report channel state information is included, and which is used for scheduling of a physical uplink shared channel, and the mobile station apparatus reports the channel state information for the one or more downlink component carriers to the base station apparatus using the physical uplink shared channel in accordance with the value set to the information bit, and a correspondence between a value set to the information bit and the one or more downlink component carriers is set in the mobile station apparatus by the base station apparatus using a signal of a higher layer.

主权项

1. A base station apparatus which is configured to communicate 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, a higher layer signal including first information used for configuring a first set of one or more downlink component carriers and a second set of one or more downlink component carriers, the first set corresponding to a first value of a field of second information, the second set corresponding to a second value of the field of the second information, the second information being used for requesting a transmission of channel state information, wherein the transmitting unit is configured to transmit using a physical downlink control channel, to the mobile station apparatus, downlink control information including the second information, the downlink control information being used for scheduling of a physical uplink shared channel in one uplink component carrier; and a receiving unit configured to receive using the physical uplink shared channel, from the mobile station apparatus, the channel state information for the first set of the one or more downlink component carriers which is configured in a case that the downlink control information including the second information is transmitted and a value of the field of the second information is the first value, wherein the receiving unit is configured to receive using the physical uplink shared channel, from the mobile station apparatus, the channel state information for the second set of the one or more downlink component carriers which is configured in a case that the downlink control information including the second information is transmitted and a value of the field of the second information is the second value.