Sequence-Based PUCCH Resource Mapping for Larger UCI Payloads
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Solution Overview
Problem
Existing 3GPP Rel-16 NR specifications limit PUCCH transmissions to carrying only up to 2 bits of uplink control information (UCI), necessitating improvements to support larger UCI payloads.
Innovation Solution
A method for sequence-based PUCCH transmissions involving a UE determining resource sets and sequences for UCI payload transmission, selecting appropriate resource sets and sequences, and transmitting them to carry larger UCI payloads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If sequence-based PUCCH Format 0 is used for transmission, then the transmission can be performed with simple sequence structure, but the UCI payload size is limited to only 2 bits
Solution Approach 1:
The UCI payload is segmented into multiple 2-bit groups, with each group mapped to a separate PUCCH Format 0 transmission. This allows the system to maintain the simplicity of Format 0 while supporting larger overall payload sizes by dividing the information into multiple transmitable units.
Solution Approach 2:
Multiple PUCCH Format 0 transmissions are performed in periodic or repeated manner to convey different segments of the UCI payload. The periodic transmissions enable the system to overcome the 2-bit limitation by accumulating information across multiple transmission instances.
2Quantity of substance
If larger UCI payloads are transmitted using existing PUCCH formats, then more control information can be conveyed, but the transmission complexity and resource requirements increase significantly
Solution Approach 1:
PUCCH Format 0, originally designed for simple 2-bit transmissions, is made multi-functional by enabling it to carry segments of larger UCI payloads through multiple transmissions. This universal approach allows the same simple format to serve both small and large payload requirements without introducing complex new formats.
Solution Approach 2:
Instead of creating a new complex PUCCH format for large payloads, the system uses multiple copies of the simple Format 0 structure. Each copy carries a segment of the payload, and the receiver reconstructs the full payload by combining information from multiple copies.
3Quantity of substance
If multiple PUCCH Format 0 transmissions are used to convey larger payloads, then the UCI payload capacity is extended, but the number of transmissions and resource usage increases
Solution Approach 1:
The system transmits partial segments of the UCI payload across multiple PUCCH Format 0 transmissions rather than attempting to transmit the entire payload in a single complex transmission. This partial action approach allows efficient use of existing simple format while achieving larger overall payload capacity.
Data Source
AI summary
An system and a method are disclosed for sequence-based physical uplink control channels (PUCCHs). A method includes a UE determining an uplink control information (UCI) payload to be transmitted, determining, based on the UCI payload to be transmitted, a grouping of resource sets and sequences, each sequence corresponding to a resource set, selecting one or more resource sets and one or more sequences from among the determined grouping of resource sets and sequences, according to a mapping operation, for transmitting the UCI payload, and transmitting the selected one or more sequences as part of a UCI payload transmission.