Home of RF and Wireless Vendors and Resources

One Stop For Your RF and Wireless Need

5G NR PUCCH | contents, function, physical layer processing

This page covers 5G NR PUCCH function, 5G NR PUCCH contents, mapping and physical layer processing of 5G NR PUCCH.

Following channels are supported by 5G NR wireless system.
Downlink channels: PDSCH (DL shared channel), PBCH (Broadcast channel), PDCCH (DL control channel)
Uplink channels: PRACH (Random Access Channel), PUSCH (UL shared channel), PUCCH (UL control channel)

5G NR PUCCH function, contents and mapping

5G NR PUCCH

• PUCCH channel is used to transport UCI (Uplink Control Information) e.g. HARQ feedback, CSI (Channel State Information) and SR (Scheduling Request).
• 5G NR PUCCH is flexible in time domain and frequency domain.
• The PUCCH channel utilizes five PUCCH formats.
• PUCCH format 0 and 2 occupies 1 or 2 OFDM symbols. It is known as short PUCCH.
• PUCCH format 1, 3 and 4 occupies 4 to 14 OFDM symbols. It is known as long PUCCH.
• PUCCH format 0 and 1 carry UCI payloads having 1 or 2 bits.
• Other PUCCH formats carry UCI payloads having more than 2 bits.

PUCCH Format Length of OFDM symbols Number of Bits
0 1-2 <=2
1 4 to 14 <=2
2 1 to 2 >2
3 4 to 14 >2
4 4 to 14 >2

• In PUCCH formats 1/3/4, symbols having DMRS are time multiplexed with UCI symbols to achieve low PAPR .
• In PUCCH format 2, DMRS is frequency multiplexed with data subcarriers.
• Multi user multiplexing on same time/frequency resources is supported for PUCCH formats 0/1/4 only with the help of unique cyclic shifts.
• UE can also be configured for CSI reporting or SR with the help of PUCCH resources.
• For transmission of UCI + (HARQ-ACK) , 4 PUCCH resource sets are used based on UCI size. For first set is used for maximum of 2 HARQ-ACK bits (i.e. max. 32 PUCCH resources). The other sets are used for 2 bits of UCI (i.e. max. 8 PUCCH resources).
• 5G NR UE determines set based on UCI size and also indicates PUCCH resource in the set based on DCI's 3 bit field.

5G NR PUCCH physical layer processing

5G NR Physical layer processing for PUSCH channel

The physical layer processing for PUSCH is shown in the figure-1. Refer complete article on 5G NR Physical layer >> for more information. PUCCH channel follows the same modules with modifications as described in the 3GPP TS 38.211, 38.212, 38.213 and 38.214 specifications.

5G TECHNOLOGY RELATED LINKS

This 5G tutorial also covers following sub topics on the 5G technology:
5G basic tutorial
5G Frequency Bands
5G millimeter wave tutorial
5G mm wave frame
5G millimeter wave channel sounding
Difference between 4G and 5G
5G testing and test equipments
5G network architecture
5G NR Physical layer


5G NR Control and Traffic Channels

5G NR Mini Slot
5G NR Bandwidth Part
5G NR slot formats
5G NR SSB, SS, PBCH
5G NR PRACH
5G NR PDCCH
5G NR PUCCH
5G NR Reference Signals


What is Difference between

difference between FDM and OFDM
Difference between SC-FDMA and OFDM
Difference between SISO and MIMO
Difference between TDD and FDD
Difference between 802.11 standards viz.11-a,11-b,11-g and 11-n
OFDM vs OFDMA
CDMA vs GSM
Bluetooth vs zigbee
Fixed wimax vs mobile
wibro vs mobile wimax
Microcontroller vs microprocessor

RF and Wireless Terminologies


Share this page

Translate this page