Control channels carry cell-wide information and indicators to the user equipment (UE), such as downlink control information (DCI) messages. DCI messages support the scheduling of downlink shared channel (DL-SCH) transmissions. DCI messages are encoded and transmitted through the physical downlink control channel (PDCCH). For an overview of the available PDCCH functionalities, see Downlink Physical Channels.
Model DCI message encoding, PDCCH processing, and information recovery in 5G NR communications system.