Patent ID: 9112656
Filing Date: 2015-08-18
Classification: H04L,H04W

Abstract:
1. A mobile station apparatus that is configured to communicate with a base station apparatus, the mobile station apparatus comprising: a reception circuitry configured to receive, from the base station apparatus, a downlink control information format including information requesting the mobile station apparatus to transmit a sounding reference signal; and a transmission circuitry configured to transmit, to the base station apparatus, the sounding reference signal based on a detection of the information requesting the mobile station apparatus to transmit the sounding reference signal included in the downlink control information format, wherein in a case that the information requesting the mobile station apparatus to transmit the sounding reference signal included in the downlink control information format is detected within a time period T, the transmission circuitry is configured to transmit, to the base station apparatus, the sounding reference signal in a subframe n, and the time period T is expressed by formula: the a_Period which corresponds to a periodicity for the transmission of the sounding reference signal and is configured by a higher layer.