A base station capable of allocating channel status reports includes a memory, a communication module and a processor. The processor is configured to send RRC configuration messages each including a periodic CSI parameter set and a discontinuous reception parameter set to user devices respectively. The periodic CSI parameter set includes a report period, a report time shift and a piece of PUCCH resource information. The RRC configuration messages include the same report period, the same report-time shift and the same PUCCH resource information. The processor is configured to determine one of a plurality of conflicting user devices among the user devices will report a CSI when predicting that the plurality of conflicting user devices will report the CSI simultaneously. The processor is configured to send a sleep instruction to the conflicting user devices except the conflicting user device determined to report the CSI.