Reference signal transmitting method, mobile terminal apparatus and radio base station apparatus

摘要

It is an object of the present invention to provide a reference signal transmitting method, a mobile terminal apparatus and a base station apparatus capable of reducing influences on a PDCCH even when performing transmission control over an aperiodic reference signal for measuring channel quality. Downlink control information corresponding to each component carrier in which transmission control information of a reference signal for measuring channel quality is set is aggregated and assigned to a downlink control channel of a specific component carrier for a mobile terminal apparatus that performs radio communication in a system band containing a plurality of component carriers and transmitted, and when the mobile terminal apparatus controls transmission of the reference signal for measuring channel quality based on the transmission control information of the reference signal for measuring channel quality included in the received downlink control information, the downlink control information corresponding to each component carrier includes a bit field in which identifier information of the component carrier is set and the transmission control information of the reference signal for measuring channel quality is set in the bit field.

主权项

1. A mobile terminal apparatus that performs radio communication in a system band containing a plurality of component carriers, comprising:
a control channel receiving section configured to receive downlink control information corresponding to each component carrier, the downlink control information contains transmission control information of a reference signal for measuring channel quality and wherein downlink control information corresponding to each component carrier is aggregated and assigned to a downlink control channel of a specific component carrier; a transmission setting section configured to control transmission of the reference signal for measuring channel quality based on the transmission control information of the reference signal for measuring channel quality contained in the downlink control information received by the control channel receiving section; and a format reporting signal receiving section configured to receive format information of a bit field that is set based on a number of component carriers to which resources can be allocated, wherein:
the downlink control information corresponding to each component carrier comprises the bit field in which identifier information of a component carrier is set and the transmission control information of the reference signal for measuring channel quality is also set in the bit field,the format information is related to a correspondence relationship between the bit field, the identifier information, and the transmission control information of the reference signal for measuring channel quality, andthe control channel receiving section reads the transmission control information of the reference signal for measuring channel quality set in the bit field based on the format information.