NR CSI Reporting Timing for CPU Occupancy Control
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Solution Overview
Problem
In wireless communication systems, particularly in NR systems, there is a challenge in efficiently managing Channel Status Information (CSI) reporting to reduce energy consumption and avoid premature CPU occupancy, which can lead to conflicts and inefficiencies in resource allocation.
Innovation Solution
A method for dynamic triggering of periodic CSI reporting, utilizing CSI-ReportConfig and DCI to configure CSI reporting on physical layer channels, with specific timing based on reportConfigType domains, and incorporating HARQ-ACK to optimize resource usage and avoid redundant overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If periodic CSI Reporting is triggered using dynamic signaling, then CSI feedback efficiency is improved and redundant overhead is reduced, but CPU occupation time needs to be further adjusted to avoid premature occupancy
Solution Approach 1:
The patent determines the CPU occupation time in advance by identifying the first symbol based on reportConfigType (either the first symbol of PDCCH for semi-persistent reporting or the oldest symbol in the occasion set for periodic reporting). This preliminary determination prevents premature CPU occupancy and allows for optimized resource allocation before the actual CSI reporting occurs.
Solution Approach 2:
The patent dynamically adjusts CPU occupation time based on the reportConfigType domain. For semi-persistent CSI reporting, the CPU occupation starts from the first symbol of PDCCH, while for periodic CSI reporting, it starts from the oldest symbol in the occasion set. This dynamic adjustment optimizes resource allocation according to different reporting configurations.
2Loss of information
If multiple CSI Reports are configured simultaneously, then comprehensive channel state information is obtained, but resource allocation conflicts and energy consumption increase
Solution Approach 1:
The patent determines the first symbol for CPU occupation in advance based on the reportConfigType domain before processing multiple CSI reports. This allows the base station to pre-allocate CPU resources and avoid energy-wasting conflicts by knowing exactly when each CSI report will occupy the CPU, enabling better scheduling decisions for multiple simultaneous reports.
3Measurement precision
If CPU resources are allocated for CSI Reporting, then accurate channel state feedback is achieved, but resource allocation complexity increases
Solution Approach 1:
The patent uses the reportConfigType domain parameter to determine the starting symbol for CPU occupation. By changing the parameter value (semi-persistent vs. periodic), the system automatically adjusts the CPU allocation timing without requiring complex resource allocation algorithms. This simplifies the resource management while maintaining accurate CSI feedback.
Data Source
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AI summary
Disclosed in the present application are methods and devices for wireless communication. a first receiver receiving a first CSI-ReportConfig and receiving a first DCI; a first transmitter sending at least a first CSI Reporting as a response to receiving the first DCI; wherein the first CSI-ReportConfig is used to configure the at least first CSI Reporting; the first CSI Reporting occupies a CSI processing unit from the first symbol until the last symbol of the first physical layer channel; the first CSI Reporting is on the first physical layer channel; the first symbol is related to the reportConfigType domain in the first CSI-ReportConfig. The present application can reduce complexity, optimize CPU occupancy, improve the feedback efficiency of CSI, and improve performance.