CSI Report Transmission Timing on PUSCH
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing the transmission of multiple channel state information (CSI) reports by user equipment (UE) due to limitations in processing time and wait time periods, leading to suboptimal channel condition feedback in 5G New Radio (NR) technology.
Innovation Solution
A method where the UE determines a wait time period and processing time periods for CSI reports, comparing the maximum processing time to the wait time to decide whether to update and transmit CSI reports, optimizing the timing for efficient channel feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the UE transmits multiple CSI reports simultaneously on PUSCH, then the channel condition feedback completeness is improved, but the processing time requirement increases beyond available wait time periods
Solution Approach 1:
The patent segments the transmission of multiple CSI reports by dividing them into different priority groups (first priority and second priority CSI reports). This segmentation allows the UE to process and transmit high-priority reports within the available wait time period, while deferring lower-priority reports to subsequent transmission opportunities, thereby resolving the contradiction between feedback completeness and processing time constraints
Solution Approach 2:
The patent extracts and prioritizes critical CSI reports (first priority) from the overall set of M CSI reports. By identifying and separating the most important channel state information that requires timely feedback, the system ensures that essential feedback is transmitted within the wait time period, while non-critical reports are handled in subsequent transmissions
2Measurement precision
If the UE updates all M CSI reports, then the feedback accuracy is improved, but the computational complexity and processing overhead increase
Solution Approach 1:
The patent applies local quality by assigning different processing priorities to different CSI reports based on their importance. First priority CSI reports receive full processing attention and are updated with high accuracy, while second priority reports use simplified processing or are deferred. This selective processing approach maintains feedback accuracy for critical reports while reducing overall computational complexity
Solution Approach 2:
The patent implements partial action by updating only a subset of the M CSI reports (specifically, the first priority reports) within the current wait time period, rather than attempting to update all reports. This partial processing approach provides sufficient feedback accuracy for immediate needs while avoiding the excessive processing overhead of updating every single report
3Productivity
If the UE transmits all N CSI reports in the current UCI region, then the reporting efficiency is improved, but the risk of transmission errors increases due to time constraints
Solution Approach 1:
The patent performs preliminary action by prioritizing and preparing first priority CSI reports for transmission before the wait time period expires. By pre-identifying and processing the most critical reports first, the system ensures reliable transmission of essential feedback within the current UCI region, while maintaining the option to transmit additional reports if time permits
Data Source
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AI summary
In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. The UE receives, from a base station, a trigger for reporting M CSI reports. M is an integer greater than 0. The UE determines a wait time period from a reference point to a time point at which N CS1 reports of the M CSI reports are to be transmitted. N is an integer greater than 0 and smaller than or equal to M. The UE determines N respective processing time periods for updating the N CSI reports. The UE determines a maximum processing time period that is the largest among the N respective processing time periods. The UE further determines whether to update the N CSI reports based on the maximum processing time period and the wait time period.