5G PUCCH and 5G PUSCH
Channel coding for uplink control information (UCI)
UCI size including
CRC, if present
|
Channel code
|
1
|
Repetition code
|
2
|
Simplex code
|
3-11
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Reed Muller code
|
>11
|
Polar code
|
- For HARQ-ACK feedback of PDSCH with corresponding DCI, PUCCH resource set(s) containing one or more PUCCH resources are configured.
- One PUCCH resource is determined based on the UCI payload size and the PUCCH resource indicator field in the DL assignment. For HARQ-ACK feedback of PDSCH without corresponding DCI, SR, and CSI report, a PUCCH resource is configured for each.
- When multiple PUCCHs are overlapped fully or partially in time, the UCIs are multiplexed in a PUCCH.
- When a PUCCH is overlapped with a PUSCH fully or partially in time, the UCI is multiplexed (i.e. piggybacked) on the PUSCH.
- Each PUCCH resource is configured with a PUCCH format. Various PUCCH formats are specified as in Figure.
- Each PUCCH format supports either durations of 1 to 2 symbols, or durations of 4 to 14 symbols.
- PUCCH formats 0/2 are called as short-PUCCH, which can deliver UCI by 1 or 2 symbols. PUCCH formats 0/2 are beneficial to reduce latency.
- PUCCH formats 1/3/4 are called as long-PUCCH, which can deliver UCI with any of 4 to 14 symbols. PUCCH formats 1/3/4 are adopted to improve coverage.
- The frequency/time-domain resources for PUCCH transmissions in NR are flexibly configurable.
- In PUCCH format 0/1/4, multiple PUCCH resources can be CDMed on the same time/frequency resource.
- A short-PUCCH can be TDMed with a long-PUCCH or a short PUCCH within a slot.
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