CSI Beam Prediction Feedback With Difference-Only Reporting
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Solution Overview
Problem
Existing wireless communication systems face significant overhead in signaling beam identifiers for both actual and predicted channel measurement results, which is unnecessary in some situations.
Innovation Solution
A user equipment (UE) sets a bit or flag in a first channel state information (CSI) report to indicate differences between actual and predicted beam identifiers, triggering a second report to identify these differences, thereby reducing the need to signal the full set of predicted beam identifiers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the UE signals the full set of predicted beam identifiers in the first CSI report, then the network entity has complete information for beam management, but the signaling overhead increases significantly
Solution Approach 1:
The patent extracts only the essential information (differences between actual and predicted beam identifiers) from the complete beam identifier set and transmits only this extracted portion in the first CSI report, rather than transmitting the full set of predicted beam identifiers. This reduces signaling overhead while maintaining the network entity's ability to perform beam management through the use of a second CSI report for complete information when needed.
2Reliability
If the UE transmits a second report to identify differences between beam identifier sets, then the network entity maintains consistency in channel performance measurement, but additional signaling overhead is introduced
Solution Approach 1:
The patent applies partial action by transmitting only the necessary portion of information (difference indicators) in the first CSI report rather than the complete beam identifier sets. The second CSI report is triggered conditionally based on whether differences exist, thereby maintaining measurement consistency only when needed while reducing overall signaling overhead through selective transmission.
3Measurement precision
If the UE includes beam identifier mapping information in the second report, then the network entity can accurately map predicted results to actual measurements, but the complexity of the reporting procedure increases
Solution Approach 1:
The patent segments the beam identifier information transmission into two separate reports: the first CSI report carries difference indicators between actual and predicted beam identifiers, while the second CSI report carries the complete mapping information when needed. This segmentation allows the system to maintain measurement precision through accurate mapping while reducing the complexity of each individual report and enabling conditional transmission based on actual needs.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A user equipment (UE) may transmit a first report including a set of measurement results and a set of predicted measurement results, the first report further including an indication of one or more differences between a first set of beam identifiers associated with the set of measurement results and a second set of beam identifiers associated with the set of predicted measurement results. The UE may receive, based at least in part on the indication of the one or more differences, a grant scheduling transmission of a second report. The UE may transmit the second report according to the grant, the second report identifying a mapping of the one or more differences between the first set of beam identifiers and the second set of beam identifiers.