ed UE-specific slot configuration table) configured through RRC. The SFI can be either dynamically configured through a DCI or statically or semi-statically configured through RRC. The UE assumes there is no conflict between dynamic SFI and downlink control 388 Chapter 3 Table 3.13: Slot formats for normal cyclic prefix ("D/U" denotes flexible downlink/uplink symbols) [12]. Symbol Number in a Slot Slot Format (Continued) New Radio Access Physical Layer Aspects (Part 1) Table 3.13: (Continued) Symbol Number in a Slot Slot Format 56-255 Reserved information (DCI) DL/UL assignments, thus when operating in NR TDD mode, one has to clearly define how available time slots are allocated to downlink and uplink transmissions. The NR defines those patterns in more flexible manner using the following parameters (see Fig. 3.46) [21]: dl-UL-TransmissionPeriodicity: Periodicity of the DL-UL pattern nrofDownlinkSlots: Number of consecutive full DL slots at the beginning of each DL-UL pattern 390 Chapter 3 Subframe = 1 ms DL control and data UL control and data DL control DL data UL control DL control UL data UL control DL control DL data UL data UL control Figure 3.45 Different NR TDD-based subframe structures [53]. nrofDownlinkSymbols InrofUplinkSymbols nrofDownlinkSlots enrofUplinkSlots dI-UL-TransmissionPeriodicity nrofDownlinkSymbols nrofUplinkSymbols dl-UL-Transmission Periodicity Specified in tdd-UL-DL-configurationCommon n (SlotIndex) Figure 3.46 TDD UL/DL common and dedicated configurations (15,39]. nrofDownlinkSymbols: Number of consecutive DL symbols in the beginning of the slot following the last full DL slot nrofUplinkSlots: Number of consecutive full UL slots at the end of each DL-UL pattern nrofUplinkSymbols: Number of consecutive UL symbols at the end of the slot preceding the first full UL slot As shown in Table 3.13, a slot format includes a specific downlink, uplink, and flexible symbol configuration. In TDD mode, a slot can be all downlink, all uplink, or a combina- tion of downlink and uplink segments. Data t