CSI Bit Mapping for Joint Polar Coding in 5G NR Reporting
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Solution Overview
Problem
In 5G NR communication, there is no effective method to reasonably map positions of various types of information in CSI reporting, which affects the overall performance of CSI reporting.
Innovation Solution
A method and apparatus for encoding CSI that maps first, second, third, and fourth types of information bits according to indexes in a position index set, either by placing the first type of information bits in specific position indexes and determining indexes for the other types, or by placing the fourth type of information bits and determining indexes for the first, second, and third types, followed by Polar codes encoding to obtain an encoded bit sequence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If joint coding mechanism is employed for CSI reporting, then encoding efficiency is improved, but mapping complexity of various information types increases
Solution Approach 1:
The patent changes the parameter of information bit arrangement by introducing a specific mapping rule that sorts information bits according to their importance weights. This transforms the complex mapping problem into a systematic process where bits are arranged based on predefined weight parameters, reducing mapping complexity while maintaining joint coding efficiency
Solution Approach 2:
The patent applies local quality by assigning different importance weights to different types of CSI information (CRI, RI, PMI, CQI). Each information type receives appropriate weight based on its significance, allowing differential treatment in the mapping process. This enables efficient joint coding while simplifying the mapping through weight-based prioritization
2Reliability
If CSI information is padded to same length, then blind detection is reduced, but determination of padding bit lengths and information contents becomes more complex
Solution Approach 1:
The patent performs preliminary action by pre-defining importance weights for different CSI information types before the actual encoding process. This preliminary weight assignment enables systematic determination of bit positions and padding requirements, reducing the complexity of determining padding bit lengths and information contents while maintaining consistent length padding for blind detection reduction
3Ease of manufacture
If various information types are mapped without systematic approach, then encoding process is simple, but overall CSI reporting performance deteriorates
Solution Approach 1:
The patent introduces importance weight parameters to transform the encoding process from simple arbitrary mapping to systematic weight-based mapping. This parameter change maintains encoding simplicity through automated weight-based sorting while significantly improving CSI reporting performance by ensuring important information bits are placed in optimal positions
Solution Approach 2:
The patent applies local quality by assigning different importance weights to different CSI information types (CRI, RI, PMI, CQI). This enables differential mapping where each information type receives appropriate attention based on its significance, improving overall reporting performance while maintaining encoding simplicity through the systematic weight-based approach
Data Source
AI summary
Provided is a method and an apparatus for encoding CSI, a storage medium, and a processor, where the method includes: placing a first type of information bits of the CSI in a first type of position indexes of the position index set, and determining, from the indexes other than the first type of position indexes determined by the first type of information bits in the position index set, indexes of the second type of information bits of the CSI, indexes of the third type of information bits of the CSI, and indexes of the fourth type of information bits in the position index set; or placing the fourth type of information bits in the fourth type of position indexes of the position index set, and determining indexes of the first type of information bits, indexes of the second type of information bits, and indexes of the third type of information bits of the CSI in the position index set from indexes other than the fourth type of position indexes determined by the fourth type of information bits in the position index set. The present disclosure solves the problem that positions of various types of information in the CSI reporting cannot be reasonably mapped in the related art.