Bandwidth-Part CSI Reporting with Priority-Based Payload Omission
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Solution Overview
Problem
The challenge in wireless communication systems is the management of channel state information (CSI) payload exceeding resource capacity, necessitating methods to omit parts of CSI and determine priority for efficient reporting.
Innovation Solution
A method is proposed to configure CSI into first and second parts, allowing partial omission based on priority, and activate specific bandwidth parts (BWP) for reporting within allocated resource capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If channel state information payload size is increased to improve reporting accuracy, then measurement precision is improved, but resource capacity is exceeded causing transmission failure
Solution Approach 1:
The CSI report is divided into two parts: Part 1 containing priority information (RI, CQI, PMI) and Part 2 containing additional channel state information. This segmentation allows the system to transmit critical information first while optionally transmitting additional information based on available resource capacity, thus resolving the contradiction between reporting accuracy and resource constraints.
Solution Approach 2:
The patent extracts and prioritizes essential CSI parameters (Rank Indicator, Channel Quality Indicator, Precoding Matrix Indicator) that are most critical for downlink scheduling decisions. By separating these essential parameters from supplementary CSI information, the system ensures that resource-constrained transmissions still convey the most important channel state data, maintaining measurement precision within available resource capacity.
2Quantity of substance
If channel state information is partially omitted to fit resource capacity, then resource usage is optimized, but information loss increases
Solution Approach 1:
The patent applies different quality levels to different parts of the CSI report. Part 1 contains high-quality, essential information that is always transmitted, while Part 2 contains lower-priority supplementary information that is transmitted only when resource capacity permits. This local quality differentiation minimizes information loss by ensuring critical parameters are always reported while allowing optional reporting of less critical parameters.
Solution Approach 2:
The system performs partial CSI reporting by transmitting only the most essential parameters when resource capacity is limited, rather than attempting to transmit the complete CSI report. This partial action approach ensures that sufficient information for basic scheduling decisions is always available, while accepting that detailed channel state information may be omitted under resource constraints.
3Quantity of substance
If CSI parameters are prioritized and selectively transmitted, then resource capacity utilization is improved, but system complexity increases
Solution Approach 1:
The patent establishes predetermined priority rules for CSI parameters before transmission occurs. The UE and gNB agree in advance on which parameters (RI, CQI, PMI) constitute Part 1 (high priority) and which constitute Part 2 (lower priority). This preliminary classification eliminates the need for complex real-time priority decisions during transmission, reducing processing complexity while maintaining efficient resource capacity utilization.
Solution Approach 2:
The system changes the parameter structure of CSI reporting by introducing a two-part framework with explicit priority differentiation. Instead of treating all CSI parameters equally, the system modifies the reporting structure to include priority indicators and separate transmission parts, enabling more efficient resource capacity utilization through structured parameter prioritization without requiring complex dynamic decision-making.
Data Source
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AI summary
Disclosed are a method for reporting channel state information in a wireless communication system, and a device for same. Specifically, a method for a user equipment (UE) to report channel state information (CSI) in a wireless communication system includes: receiving bandwidth part (BWP) configuration information related to a BWP; receiving information for activating a specific bandwidth part among one or more bandwidth parts based on the BWP configuration information; receiving a reference signal; calculating CSI based on the reference signal; and transmitting the CSI by omitting a part of the CSI in the activated specific bandwidth part, based on a priority rule, wherein the CSI includes information related with coefficients, and each of elements of the information related to the coefficients is classified as a first group and a second group based on a priority value, wherein the priority value is determined as an order in which a higher index and a lower index of indexes of a frequency domain related to the elements are sequentially crossed based on a predefined specific index, and wherein a priority of the first group is defined as being higher than a priority of the second group in the priority rule.