Beam Reporting via MAC CE Trigger Conditions
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Solution Overview
Problem
Current 3GPP networks face performance degradation due to inefficient beam reporting, leading to incorrect cell selection and mobility issues, as existing methods rely on delayed or inaccurate beam status reports, particularly in scenarios with large reporting intervals.
Innovation Solution
Implementing high-efficient beam reporting using Media Access Control (MAC) Control Elements (CEs) with defined trigger conditions, periodic timers, and scheduling requests to facilitate timely and accurate beam information transmission, allowing for flexible reporting and reducing reliance on uplink control information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If beam reporting is performed using existing methods with delayed reporting intervals, then the system complexity is reduced, but the beam reporting accuracy and timeliness deteriorate
Solution Approach 1:
The patent implements dynamic beam reporting by introducing trigger conditions that adapt the reporting behavior to current channel conditions. The UE monitors reference signals and triggers reports only when specific conditions are met (e.g., beam quality changes exceed a threshold, or a maximum time since last report is reached), making the reporting system adaptive rather than static. This resolves the contradiction by maintaining high accuracy through condition-based reporting while avoiding unnecessary reports that would increase complexity.
Solution Approach 2:
The patent changes the reporting parameters dynamically by introducing multiple trigger conditions (quality-based triggers, time-based triggers, event-based triggers) that modify when and how reports are generated. The gNB can configure different trigger conditions and the UE selects appropriate reporting behavior based on current measurements, allowing the system to adjust reporting frequency and content based on actual needs rather than using fixed intervals, thus improving accuracy without proportionally increasing complexity.
2Use of energy by moving object
If beam reporting interval is increased to reduce reporting frequency, then the energy consumption is reduced, but the beam status update timeliness deteriorates
Solution Approach 1:
The patent implements periodic beam reporting with configurable intervals. The gNB configures periodicity parameters, and the UE performs measurements and reports at these periodic intervals. This allows the system to balance energy consumption and timeliness by adjusting the periodicity - longer intervals reduce energy usage while still providing timely updates within the configured period, resolving the contradiction between energy efficiency and update timeliness.
Solution Approach 2:
The patent implements feedback mechanisms where the gNB receives beam status reports from the UE and uses this information to adjust future reporting configurations. The gNB can modify trigger conditions, periodicity, or thresholds based on observed channel conditions and reporting patterns, optimizing the balance between energy consumption and update timeliness dynamically rather than using fixed parameters.
3Measurement precision
If beam reporting is performed frequently to improve accuracy, then the beam status precision is improved, but the uplink control information overhead increases
Solution Approach 1:
The patent extracts and reports only the essential beam status information rather than transmitting complete measurement data for all beams. The UE identifies the best beam(s) based on measurements and reports only the relevant beam indices and quality metrics that meet the trigger conditions. This reduces uplink overhead by filtering out unnecessary information while maintaining the precision needed for beam selection and mobility decisions.
Solution Approach 2:
The patent implements partial reporting where the UE reports beam status information selectively based on trigger conditions rather than reporting all measurements continuously. The UE may report only when beam quality changes exceed a threshold, or only report the top N beams instead of all measured beams, or use differential reporting for incremental updates. This partial action approach maintains necessary precision while significantly reducing the average uplink control overhead compared to continuous full reporting.
Data Source
AI summary
The present application relates to devices and components including apparatus, systems, and methods to beam reporting using media access control (MAC) control element (CE) in wireless communication systems.