Channel State Information Coefficient Omission for UCI Transmission
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Solution Overview
Problem
In radio communication systems, particularly in New Radio defined by 3GPP, there is a challenge in efficiently transferring uplink control information (UCI) from user equipment (UE) to the base station (BS) when the available UCI exceeds the allocated resources, leading to increased delay and inefficient resource allocation.
Innovation Solution
The method involves partitioning channel state information (CSI) into groups of different priority levels using permutation functions based on the amplitude distribution of non-zero coefficients, prioritizing and omitting coefficients accordingly to ensure the CSI payload fits within the available resource allocation, thereby optimizing the transmission of remaining coefficients.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If all available UCI is transmitted, then information completeness is improved, but resource allocation efficiency deteriorates and transmission delay increases
Solution Approach 1:
The patent segments CSI reports into multiple priority levels (0 to 2NRep) based on the importance of different coefficient groups. High-priority coefficients essential for basic channel state estimation are transmitted first, while lower-priority coefficients are omitted when resources are limited. This segmentation allows the system to transmit a subset of UCI that maintains essential information while fitting within allocated resources.
Solution Approach 2:
The patent extracts and transmits only the most critical coefficients from the full CSI report. By identifying and removing redundant or less important coefficients based on predefined priority rules, the system ensures that the essential UCI information is transmitted within the available resource constraints, avoiding the need to transmit all available UCI.
2Loss of information
If all available UCI is transmitted, then information completeness is improved, but transmission delay increases
Solution Approach 1:
The patent segments CSI reports into multiple priority levels (0 to 2NRep) based on the importance of different coefficient groups. High-priority coefficients essential for basic channel state estimation are transmitted first, while lower-priority coefficients are omitted when resources are limited. This segmentation allows the system to transmit a subset of UCI that maintains essential information while fitting within allocated resources.
Solution Approach 2:
The patent applies preliminary prioritization and selection of coefficients before transmission based on predefined priority rules. By pre-identifying which coefficients are most important and will fit within resource constraints, the system avoids waiting for additional resources and can transmit the essential UCI information immediately, reducing transmission delay.
3Productivity
If frequency compression is applied, then resource efficiency is improved, but traditional segmentation methods become infeasible
Solution Approach 1:
The patent changes the segmentation parameters from traditional odd/even subband divisions to group-based divisions (group 0, group 1, group 2) that are compatible with frequency compression. This parameter change allows the system to maintain efficient resource utilization with compressed representations while still applying priority-based segmentation for coefficient selection.
Data Source
AI summary
In accordance with an example embodiment of the present invention, a method, apparatus and software program product for partitioning channel state information into groups of different priority levels, wherein said channel state information comprises non zero coefficients and said partitioning comprises using at least one permutation function to prioritize said non-zero coefficients substantially based on an amplitude distribution of said non zero coefficients to determine mapping of said non zero coefficients to said groups, and further for omitting zero or more non-zero coefficients in accordance with said amplitude distribution based prioritizing from said groups, and for transmitting remaining non zero coefficients in said groups.