A communication device, comprising: a receiving circuit configured to operably receive an uplink-downlink, called UL-DL hereinafter, reconfiguration message from a communication station; an uplink control information generating circuit configured to operably generate a plurality of uplink control information, called UCI hereinafter; a transmitting circuit configured to operably transmit the UCI in a plurality of data frames, wherein each of the data frames comprises a plurality of subframes; and a control circuit configured to operably determine the subframe of the data frame to be an uplink subframe, a downlink subframe or a special subframe according to the UL-DL reconfiguration message; wherein the UL-DL reconfiguration message configures the communication device to operate in one of a plurality of valid UL-DL configurations; a first plurality of subframes of the data frames are not configured to be the downlink subframe in the valid UL-DL configurations; the control circuit configures the transmitting circuit to transmit the UCI in the first plurality of subframes of the data frames; and the first plurality of subframes of the data frames are the same for the valid UL-DL configurations; wherein when the UL-DL reconfiguration message configures the communication device to operate in one or more predetermined UL-DL configurations of the valid UL-DL configurations, the control circuit further configures the transmitting circuit to transmit the UCI in a second plurality of subframes of the data frames in the predetermined UL-DL configurations; and the second plurality of subframes of the data frames are not configured to be the downlink subframe in the predetermined UL-DL configurations; wherein the UCI comprises multiple types of channel state information, called CSI hereinafter; and the control circuit configures the transmitting circuit to transmit the CSI according to a first CSI reporting mode in the first plurality of subframes of the data frames and transmit one of a designated wideband CSI and a designated subband CSI in the second plurality of subframes of the data frames in the predetermined UL-DL configurations. a receiving circuit configured to operably receive an uplink-downlink, called UL-DL hereinafter, reconfiguration message from a communication station; an uplink control information generating circuit configured to operably generate a plurality of uplink control information, called UCI hereinafter; a transmitting circuit configured to operably transmit the UCI in a plurality of data frames, wherein each of the data frames comprises a plurality of subframes; and a control circuit configured to operably determine the subframe of the data frame to be an uplink subframe, a downlink subframe or a special subframe according to the UL-DL reconfiguration message; wherein the UL-DL reconfiguration message configures the communication device to operate in one of a plurality of valid UL-DL configurations; a first plurality of subframes of the data frames are not configured to be the downlink subframe in the valid UL-DL configurations; the control circuit configures the transmitting circuit to transmit the UCI in the first plurality of subframes of the data frames; and the first plurality of subframes of the data frames are the same for the valid UL-DL configurations; wherein when the UL-DL reconfiguration message configures the communication device to operate in one or more predetermined UL-DL configurations of the valid UL-DL configurations, the control circuit further configures the transmitting circuit to transmit the UCI in a second plurality of subframes of the data frames in the predetermined UL-DL configurations; and the second plurality of subframes of the data frames are not configured to be the downlink subframe in the predetermined UL-DL configurations; wherein the UCI comprises multiple types of channel state information, called CSI hereinafter; and the control circuit configures the transmitting circuit to transmit the CSI according to a first CSI reporting mode in the first plurality of subframes of the data frames and transmit one of a designated wideband CSI and a designated subband CSI in the second plurality of subframes of the data frames in the predetermined UL-DL configurations.