frame and the predefined sub frame of the next frame the enb and or the ue selects the harq timing of the corresponding data sub frame in a frame structure 6 when the predefined sub frame is an eighth sub frame with regard to the harq timing of each data sub frame between the predefined sub frame of the current frame and the predefined sub frame of the next frame the enb and or the ue selects the harq timing of a corresponding data sub frame in a frame structure 3 this step may also include regardless of frame structure configuration of a current system information block 1 sib i after reading frame structure configuration information from reuse uplink index uli or downlink assignment index dai bit information in the dci 0 4 of the predefined sub frame the ue does not send the harq feedback in a physical uplink shared channel pusch of a next frame namely the second frame such as a n if an uplink feedback of the current ue does not receive an indication of the dci 0 4 then the harq feedback is sent in the pucch in accordance with the related art this step further includes when the system device determines.