two parts. The first part may contain RI, CRI, and/or CQI for the first codeword. The second part con- tains PMI and the CQI for the second codeword when RI > 4. A semi-persistent report car- ried on PUCCH format 3 or 4 supports only part 1 of Type II CSI feedback. Supporting Type II CSI reporting on PUCCH format 3 or 4 is considered a UE capability. A Type II CSI report (part 1 only) is carried on PUCCH format 3 or 4 and is calculated independent of any Type II CSI reports carried on PUSCH. When the UE is configured with CSI report- ing on PUCCH format 2, 3, or 4, each PUCCH resource is configured for each candidate uplink BWP. The UE will never report CSI with a payload size larger than 115 bits when configured with PUCCH format 4 [8]. The NR physical uplink control channel is used for transmission of HARQ ACK/NACK for received downlink data; CSI feedback related to the downlink channel conditions to assist dynamic scheduling, and SR indicates that a UE needs uplink resources for data transmis- sion. The NR PUCCH supports two transmission modes (see Fig. 4.77): PUCCH format 0 and 2: number of PRBs = {1,2, ,16} PUCCH format 1,3,4: number of PRBs = PUCCH {1,2,3,4,5,6,8,9,10,12,15,16} PUCCH starting PRB PUCCH format 0 and 2: starting symbol = {0,1,...,13} PUCCH format 0 and 2: number of symbols = {1,2} PUCCH format 1,3,4: starting symbol = {0,1,...,10} PUCCH format 1,3,4: number of symbols = {4,5,...,14} Figure 4.77 General time-frequency structure of PUCCH for various formats [6]. 608 Chapter 4 Short-PUCCH: NR PUCCH can be transmitted in short duration around the last uplink symbol(s) of a slot. The transmission can span one or two OFDM symbols. Long-PUCCH: NR PUCCH can be transmitted in long duration at least over four uplink symbols to improve coverage. It is also considered to support a long-PUCCH transmis- sion over multiple slots. One or multiple PRBs can be allocated as the minimum resource unit size in frequency domain for short-PUCCH and long-PUCCH. Intra-slot frequency hopping can be configured for PUCCH