Joint UCI Encoding on CG-PUSCH for NR-U Uplink Reliability
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Solution Overview
Problem
Existing communication systems face challenges in efficiently multiplexing and transmitting uplink control information (UCI) on physical uplink shared channels (PUSCH) in unlicensed spectrum, particularly in scenarios like NR-U, where the maximum number of independently coded UCI that can be multiplexed on CG-PUSCH is limited, leading to unclear solutions for indicating how to transmit multiple UCI types.
Innovation Solution
Implementing joint encoding for at least two types of UCI, such as CG-UCI, HARQ-ACK, and CSI Part 1/2, to be mapped onto a single UCI resource on the PUSCH, using Polar or short codes based on bit sums and code rate compensation factors to ensure reliable transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple UCI types are multiplexed on CG-PUSCH using independent coding, then transmission reliability is maintained, but the maximum number of UCI resources is limited and resource utilization efficiency deteriorates
Solution Approach 1:
The patent merges multiple UCI types (CG-UCI, HARQ-ACK, CSI Part 1, CSI Part 2) into a single jointly coded UCI resource on CG-PUSCH. Instead of allocating separate coding resources to each UCI type, the invention combines them into one unified coding structure, allowing all UCI types to share the same code rate compensation factor and encoding process. This resolves the contradiction by improving resource utilization efficiency through consolidation while maintaining transmission reliability through the unified coding mechanism.
2Productivity
If joint encoding is applied to multiple UCI types, then resource utilization efficiency is improved, but the complexity of encoding and decoding processes increases
Solution Approach 1:
The patent changes the coding parameter structure by introducing a unified code rate compensation factor (β_offset) that applies to all jointly coded UCI types. Instead of maintaining separate coding parameters for each UCI type, the invention uses a single set of parameters (code rate, modulation scheme, resource allocation) that are adjusted through the β_offset factor. This parameter unification simplifies the overall encoding and decoding processes while enabling efficient joint coding of multiple UCI types, thus resolving the complexity issue.
3Reliability
If separate UCI resources are allocated for each UCI type, then transmission reliability is ensured, but the number of available UCI resources is limited
Solution Approach 1:
The patent creates a universal UCI resource structure on CG-PUSCH that can simultaneously carry multiple UCI types (CG-UCI, HARQ-ACK, CSI Part 1, CSI Part 2) through joint coding. This single multi-functional resource replaces the need for multiple separate dedicated resources, effectively increasing the total number of available UCI resources. The universal resource maintains reliability by applying appropriate coding and modulation to all UCI types within the unified structure, thus resolving the contradiction between resource quantity and transmission reliability.
Data Source
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Figure 1e~2
Figure 2a
AI summary
A transmission method for uplink control information (UCI) is provided. The method includes the following. Target UCI is mapped to a physical uplink shared channel (PUSCH). The PUSCH is transmitted on configured grant (CG) uplink resources, where the target UCI includes at least two types of UCI, and the at least two types of UCI are encoded using joint encoding. According to the technical solution of the disclosure, more UCI can be carried.