Using channel state information (CSI), e.g., rank information, precoding matrix index, etc., that is reported periodically by a user equipment, a complexity of reporting of aperiodic CSI reporting can be reduced, by reducing a search space of a codebook used for the aperiodic CSI reporting, when the UE is configured with periodic and aperiodic CSI reporting. A periodic configuration of a mobile device is facilitated for transmissions of channel state data periodically, and, in response to sending a reference signal, first channel state data of the channel is received according to the periodic configuration. Based on the first channel state data, an aperiodic configuration of the mobile device can be facilitated for transmissions of the channel state data aperiodically according to aperiodic requests received by the mobile device. Then, second channel state data can be received by the network device according to the aperiodic configuration.