configuring one or more spatial correspondence between PUCCH and downlink physical Table 4.25: PUCCH formats [6]. PUCCH Number of Number Description Format OFDM Symbols of Bits PUCCH Short Short PUCCH of one or two symbols with small UCI PUCCH payloads of up to 2 bits with UE multiplexing in the same PRB Short PUCCH of one or two symbols with large UCI payloads of more than 2 bits with no multiplexing in the same PRB Long PUCCH of 4-14 symbols with small UCI payloads PUCCH of up to 2 bits with multiplexing in the same PRB Long PUCCH of -14 symbols with medium UCI payloads with some multiplexing capacity in the same Long PUCCH of 4-14 symbols with large UCI payloads with no multiplexing capacity over the same PRB 606 Chapter 4 signals such as CSI-RS or SS block. As a result, the device can transmit PUCCH using the same beam as it used for receiving the corresponding downlink signal. For example, if the spatial relation between PUCCH and SS block is configured, the device will transmit PUCCH using the same beam as it used for receiving the SS block. Multiple spatial relations can be configured and selected via MAC control elements [71]. It will be shown later in this section that the short PUCCH format of up to two UCI bits is based on sequence selection, while the short PUCCH format of more than two UCI bits fre- quency multiplexes UCI and DM-RS. The long PUCCH formats time-multiplex the UCI and DM-RS. Frequency hopping is supported for long PUCCH formats and for short PUCCH formats of duration two symbols. Long PUCCH formats can be repeated over mul- tiple slots. The UCI multiplexing in PUSCH is further supported when UCI and PUSCH transmissions coincide in the same slot, that is, UCI carrying HARQ-ACK feedback with 1 or 2 bits is multiplexed by puncturing and rate-matching PUSCH. In all other cases, the UCI is multiplexed by rate matching PUSCH. The UCI may carry CSI, HARQ ACK/ NACK, or scheduling request (SR). The QPSK modulation is used for long PUCCH with 2 or more bits of information, and short PUCCH with mo