CSI Report Segmentation for Uplink Payload Constraints
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Solution Overview
Problem
Current communication systems, particularly in 5G NR, face challenges in efficiently managing channel state information (CSI) reporting, where the available payload resources in the physical uplink channel are insufficient to carry all CSI reports, leading to reduced reporting accuracy and increased latency.
Innovation Solution
The user equipment (UE) employs techniques to optimize CSI report transmission by determining a reference size for the payload, prioritizing the inclusion of sub-reports, and selectively carrying CSI reports based on available resources, ensuring that essential CSI information is transmitted effectively while adhering to payload constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all CSI reports are transmitted in the physical uplink channel, then reporting completeness is improved, but payload capacity is exceeded causing transmission failure
Solution Approach 1:
The patent segments CSI reports into different types (Type I and Type II) and prioritizes their transmission. Type I CSI reports are transmitted first as they are more critical, while Type II reports are transmitted only if remaining payload capacity allows. This segmentation resolves the contradiction by transmitting essential CSI information even when total payload capacity is exceeded.
Solution Approach 2:
The patent applies partial action by selectively transmitting only the most critical CSI reports (Type I) when payload capacity is insufficient to accommodate all reports. This ensures that essential channel state information is conveyed even though not all CSI reports can be transmitted, maintaining reporting reliability within resource constraints.
2Quantity of substance
If CSI report size is reduced to fit payload, then payload capacity is maintained, but reporting accuracy deteriorates
Solution Approach 1:
The patent applies local quality by differentiating between critical and non-critical CSI report components. Type I CSI reports containing critical channel state information are prioritized for transmission, while Type II reports with less critical information are omitted when payload capacity is constrained. This selective approach maintains reporting accuracy for essential parameters while adapting to payload limitations.
3Reliability
If more CSI reports are transmitted, then network performance is improved, but transmission time increases causing latency
Solution Approach 1:
The patent applies preliminary action by pre-establishing transmission priorities for different CSI report types before actual transmission occurs. Type I CSI reports are designated as high priority and transmitted first, while Type II reports are transmitted only if time and capacity permit. This preliminary prioritization reduces transmission latency by ensuring critical information is conveyed quickly without waiting for all reports to be processed.
Data Source
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AI summary
A method of wireless communication of a UE is provided. The UE determines a reference size of a payload available in a physical uplink channel for carrying R channel state information (CSI) reports, R being an integer greater than 0, each of the R CSI reports including a first part containing CSI of a wideband and a second part containing CSI of one or more subbands of the wideband. The UE carries all first parts of the R CSI reports in the payload. The UE further carries second parts of (M-1) CSI reports of the R CSI reports in the payload. The UE carries a portion of a second part of an M th CSI report of the R CSI reports in the payload.