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

摘要

Based on a sounding reference signal, a base station apparatus performs efficient scheduling. The base station apparatus includes information for requesting the transmission of the sounding reference signal in a first downlink control information format or a second downlink control information format, and transmits the information to the mobile station apparatus, the mobile station apparatus transmits, based on detection of the information, the sounding reference signal to the base station apparatus, and a first parameter used for the transmission of the sounding reference signal based on the detection of the information included in the first downlink control information format and a second parameter used for the transmission of the sounding reference signal based on the detection of the information included in the second downlink control information format are individually set by a signal of a higher layer transmitted from the base station apparatus.

主权项

1. A mobile communication system in which a mobile station apparatus transmits, to a base station apparatus, a sounding reference signal, the mobile communication system comprising:
the base station apparatus configured to: transmit, to the mobile station apparatus, a higher layer signal including first parameters and second parameters, transmit, to the mobile station apparatus, a first downlink control information format including information requesting to transmit the sounding reference signal, the first downlink control information format being used for scheduling of a physical uplink shared channel, transmit, to the mobile station apparatus, a second downlink control information format including the information requesting to transmit the sounding reference signal, the second downlink control information format being used for scheduling of a physical downlink shared channel, the mobile station apparatus configured to transmit, based on a detection of the information requesting to transmit the sounding reference signal, to the base station apparatus, the sounding reference signal based on the first parameters or the second parameters, wherein the first parameters are configured for the transmission of the sounding reference signal based on the information requesting to transmit the sounding reference signal included in the first downlink control information format, and the second parameters are configured for the transmission of the sounding reference signal based on the information requesting to transmit the sounding reference signal included in the second downlink control information format.