A terminal device configured to communicate with a base station device , the terminal device comprising: a reception unit configured to receive, from the base station device , a configuration of a reference signal, RS, resource, a configuration of a time domain operation for the RS resource, and a configuration of channel state information, CSI, reporting; a measurement unit configured to perform measurement for CSI; and a transmission unit configured to perform reporting of the CSI to the base station device ; wherein the configuration of the time domain operation for the RS resource indicates one time domain operation among multiple types of time domain operations, and wherein the multiple types of operations include at least a semi-persistent operation for transmitting reference signals; the measurement unit is configured to perform channel measurement for the CSI based on the configuration of the RS resource and the configuration of the time domain operation for the RS resource; the reporting of the CSI is performed based on the configuration of the CSI reporting; the configuration of the CSI reporting includes an indicator indicating one time domain operation for the CSI reporting among multiple types of time domain operations, wherein the indicator indicates either a semi-persistent operation or an aperiodic operation; the configuration of the CSI reporting further includes an index of the configuration of the RS resource and an index of the configuration of the CSI reporting; and when the configuration of the time domain operation for the RS resource indicates a semi-persistent operation, the RS resource is activated by a bitmap in a Medium Access Control, MAC, Control Element, CE. a reception unit configured to receive, from the base station device , a configuration of a reference signal, RS, resource, a configuration of a time domain operation for the RS resource, and a configuration of channel state information, CSI, reporting; a measurement unit configured to perform measurement for CSI; and a transmission unit configured to perform reporting of the CSI to the base station device ; wherein the configuration of the time domain operation for the RS resource indicates one time domain operation among multiple types of time domain operations, and wherein the multiple types of operations include at least a semi-persistent operation for transmitting reference signals; the measurement unit is configured to perform channel measurement for the CSI based on the configuration of the RS resource and the configuration of the time domain operation for the RS resource; the reporting of the CSI is performed based on the configuration of the CSI reporting; the configuration of the CSI reporting includes an indicator indicating one time domain operation for the CSI reporting among multiple types of time domain operations, wherein the indicator indicates either a semi-persistent operation or an aperiodic operation; the configuration of the CSI reporting further includes an index of the configuration of the RS resource and an index of the configuration of the CSI reporting; and when the configuration of the time domain operation for the RS resource indicates a semi-persistent operation, the RS resource is activated by a bitmap in a Medium Access Control, MAC, Control Element, CE. <EOS>