Dci acquires information indicating a method, base station and UE

The present invention provides for acquiring information indicative of the DCI method, UE and the base station. The method includes receiving a DCI transmitted from the base station, the DCI format including the first flag and the bit, the first bit occupies 1 bit, the first bit for identifying whether the SRS triggering aperiodic; according to the format and a first bit flag information indicating the DCI is determined. Embodiments of the present invention can reduce overhead bits.