5g DCI (Downlink Control Information)
DCI（下行鏈路控制信息）的主要用途與LTE中的DCI相同（如果您不太熟悉DCI的功能，我強烈建議您先閱讀LTE DCI頁面）。
也就是說，它是調度下行鏈路數據信道（例如PDSCH）或上行鏈路數據信道（例如PUSCH）的特殊信息集。
以下是38.212-7.3下行鏈路控制信息中定義的DCI類型及其內容.
DCI Format Usage
Format 0_0 Scheduling of PUSCH in one cell
Format 0_1 Scheduling of PUSCH in one cell
Format 1_0 Scheduling of PDSCH in one cell
DCI format 1_0 with CRC scrambled by C-RNTI
DCI format 1_0 with CRC scrambled by RA-RNTI
DCI format 1_0 with CRC scrambled by TC-RNTI
DCI format 1_0 with CRC scrambled by SI-RNTI
DCI format 1_0 with CRC scrambled by P-RNTI
Format 1_1 Scheduling of PDSCH in one cell
Format 2_0 Notifying a group of UEs of the slot format
Format 2_1 Notifying a group of UEs of the PRB(s) and OFDM symbol(s) where UE may assume no transmission is intended for the UE
Format 2_2 Transmission of TPC commands for PUCCH and PUSCH
Format 2_3 Transmission of a group of TPC commands for SRS transmissions by one or more UEs