NR CSI Bit Prioritization for Lower Feedback Overhead
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Solution Overview
Problem
Conventional PMI feedback methods in NR systems result in excessive redundant overheads and fail to adapt to new channel information, necessitating a more efficient prioritization scheme for CSI reporting.
Innovation Solution
A method for determining priorities of different bits in a CSI report based on the position or parameter of the target bit, using artificial intelligence or machine learning, to optimize system performance and reduce overheads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional PMI feedback method is used, then system can support basic CSI reporting, but redundant overheads increase excessively
Solution Approach 1:
The patent extracts and reports only the most critical CSI parameters based on priority levels. By identifying and reporting only essential information (such as CRI, RI, PMI, CQI with highest priorities) while omitting less critical parameters, the system reduces CSI overhead significantly while maintaining reliable channel state feedback for key transmission parameters.
Solution Approach 2:
The patent segments CSI parameters into different priority levels (first priority, second priority, third priority, etc.). This segmentation allows the system to selectively report parameters based on current channel conditions and service requirements, transmitting high-priority parameters always and lower-priority parameters conditionally, thereby reducing overall overhead while preserving essential feedback accuracy.
2Adaptability or versatility
If conventional CSI reporting scheme is used, then existing systems can operate, but cannot adapt to new channel information
Solution Approach 1:
The patent implements dynamic adaptability by allowing the prioritization scheme and parameter selection to change based on current channel conditions, traffic type, and service requirements. The system can dynamically adjust which parameters are reported and at what priority levels, enabling adaptation to new channel information and evolving 5G NR requirements without requiring complex hardware changes.
Solution Approach 2:
The patent changes the parameter representation by introducing priority levels and selective reporting mechanisms. Instead of reporting all CSI parameters uniformly, the system transforms the reporting structure to include priority indicators and conditional reporting based on parameter importance, enabling flexible adaptation to different channel scenarios while maintaining compatibility with existing decoding capabilities.
3Loss of information
If all CSI parameters are reported, then complete channel information is provided, but overhead becomes excessively large
Solution Approach 1:
The patent applies local quality by providing different levels of information completeness for different parameter groups. High-priority parameters (such as CRI and RI) are reported with complete and accurate information, while lower-priority parameters may be reported with reduced precision or omitted entirely based on current needs. This ensures that critical channel information is always available while reducing overhead for less critical parameters.
Data Source
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AI summary
Disclosed in the present application are a method and apparatus used for nodes in wireless communications. The method comprises: a first node receiving a first information block, the first node sending first CSI. The first information block is used for determining a first RS resource set, and a measurement for the first RS resource set is used for generating a first bit group; the first CSI carries at least part of bits in the first bit group; the first bit group comprises M bit subgroups, and any two of the M bit subgroups have different priorities; a target bit is one bit in the first bit group, and the bit subgroup among the M bit subgroups to which the target bit belongs depends on position or first parameter of the target bit; each bit in the first bit group corresponds to one parameter in a first parameter group, and the first parameter is a parameter corresponding to the target bit in the first parameter group. By means of using the method, CSI reporting performance can be improved and CSI reporting overheads can be reduced.