5G • RAN
PUCCH Format 2
Short PUCCH Format for >2 Bits
Short 1-2 symbol PUCCH carrying more than 2 bits of UCI using CP-OFDM with embedded DMRS on 1 to 16 PRBs.
Technical Explanation
PUCCH Format 2 spans 1 or 2 OFDM symbols across 1 to 16 PRBs. It transmits medium to large UCI payloads (>2 bits, such as multi-carrier HARQ-ACK or subband CSI) encoded with Reed-Muller or Polar codes, using QPSK modulation and DMRS placed on every third subcarrier.
Key Functions
- Delivers low-latency multi-bit UCI payloads (>2 bits) in 1-2 symbols
- Scales bandwidth dynamically from 1 to 16 PRBs
- Uses Polar or Reed-Muller coding for error protection
Specifications
3GPP TS 38.211, TS 38.213
Interfaces
Uu
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