As we know there are different numerology introduced in 5G like in below table, how does UE knows the current slot format ? sub carrier spacing(mu) and the cyclic prefix for a bandwidth part are obtained from the higher-layer parameter subcarrierSpacing and cyclicPrefix , if (UE is provided higher layer parameter tdd- UL-DL- C onfiguration C ommon && UE is not provided higher layer parameter tdd- UL-DL- C onfiguration C ommon2 ) { A reference subcarrier spacing mu by higher layer parameter referenceSubcarrierSpacing - A slot configuration period of P msec by higher layer parameter dl-UL-TransmissionPeriodicity - A number of slots dslots with only downlink symbols by higher layer parameter nrofDownlinkSlots - A number of downlink symbols dsym by higher layer parameter nrofDownlinkSymbols - ...