CSI Reporting Time Restriction Handling
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Solution Overview
Problem
Wireless communication systems face challenges in accurately reporting channel state information (CSI) when network entities change transmit power levels, leading to phase discontinuity and reduced energy savings due to the inability to average measurements across different power levels.
Innovation Solution
User equipment (UE) receives messages indicating the disabling of time restriction parameters, allowing it to measure and report average CSI measurements based on specific rules, such as recent transmit power levels and resource quantities, to accurately represent current channel conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the network entity changes transmit power levels to save energy, then energy savings are improved, but measurement accuracy deteriorates due to phase discontinuity
Solution Approach 1:
The patent applies dynamics by making the measurement averaging process adaptive to power level changes. The UE dynamically determines whether to average measurements based on whether power level changes occur, allowing the measurement system to flexibly adjust its behavior to maintain accuracy while supporting energy-saving power changes.
Solution Approach 2:
The patent changes the measurement parameter handling based on power level conditions. When power levels change, the system resets measurements to avoid averaging across different power levels; when power levels remain constant, it averages measurements for improved accuracy. This parameter-based control resolves the contradiction between energy savings and measurement accuracy.
2Measurement precision
If the UE averages measurements across all transmitted resources, then measurement accuracy is improved, but energy savings are reduced due to inability to handle different power levels
Solution Approach 1:
The patent segments the measurement averaging process by power level. Instead of uniformly averaging all measurements regardless of power level, the UE separates measurements into different groups based on the transmit power level used. This segmentation allows accurate averaging within each power level group while preventing contamination from measurements taken at different power levels, thus maintaining both accuracy and energy savings.
Solution Approach 2:
The patent uses parameter changes by resetting the measurement averaging state when power level changes are detected. This conditional resetting allows the system to accumulate measurements for averaging only when the power level remains constant, and to start fresh when power levels change, thereby maintaining measurement accuracy without preventing energy-saving power adjustments.
3Loss of information
If the UE reports measurements for all power levels, then completeness of information is improved, but complexity of processing increases
Solution Approach 1:
The patent extracts only the relevant measurements for reporting by identifying and selecting measurements taken at the current or most recent power level. Instead of processing and reporting all measurements regardless of power level, the UE extracts the subset of measurements that are meaningful for the current transmission conditions, reducing processing complexity while maintaining information completeness for the relevant power level.
Solution Approach 2:
The patent applies dynamics by making the reporting behavior adaptive to current power level conditions. The UE dynamically determines which measurements to report based on the current power level and the power levels used for previous measurements, rather than following a fixed reporting rule. This dynamic approach reduces processing complexity by focusing only on relevant measurements while maintaining completeness for the current operating conditions.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a first message indicating that a configuration for a time restriction is disabled for the UE, such that the UE may measure one or more resources transmitted from a network entity with respect to a reference resource. The UE may receive a second message indicating that the UE is to measure one or more resources transmitted by a network entity at a first of multiple transmit power levels, the one or more resources transmitted before the reference resource, and the reference resource associated with one of the multiple transmit power levels. The UE may perform a first average measurement of the one or more resources and transmit a first report indicating the first average measurement, where the UE performs the average measurement of the one or more resources based on the second message.