Beam Failure Recovery Timer Mechanism for 5G User Equipment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing 5G beam failure handling mechanisms are prone to false beam failures, where intermittent issues are misinterpreted as actual failures, leading to unnecessary recovery processes.
Innovation Solution
Implementing a beam failure recovery timer and additional timers such as beamFailureInstanceTimer and beamFailureResetTimer to differentiate between actual and false beam failures by managing the accumulation of failure instances and resetting counters based on specific thresholds and elapsed times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If beam failure instance counter is incremented for every detected beam failure instance, then beam failure detection sensitivity is improved, but false beam failures increase
Solution Approach 1:
The patent introduces dynamic timing constraints to the beam failure detection process. Instead of statically counting all beam failure instances, the system dynamically evaluates whether successive failures occur within a predetermined time interval. This temporal dimension transforms the detection mechanism from a simple counter to a time-aware evaluation system that adapts to the actual failure patterns, thereby reducing false detections while maintaining sensitivity to genuine failures.
Solution Approach 2:
The patent implements a feedback mechanism where the outcome of beam failure recovery procedures influences future failure counting. When a beam failure recovery procedure is initiated or completed, the system provides feedback by resetting or adjusting the failure instance counter. This feedback loop prevents the same intermittent failure conditions from continuously triggering false beam failure declarations, allowing the system to learn from previous recovery attempts and adjust its detection behavior accordingly.
2Speed
If beam failure recovery procedure is initiated immediately when failure threshold is reached, then recovery speed is improved, but unnecessary recovery processes increase
Solution Approach 1:
The patent applies preliminary action by establishing timing criteria before initiating beam failure recovery procedures. Instead of immediately triggering recovery upon reaching the failure threshold, the system first checks whether the threshold was reached within a predetermined time interval. This preliminary temporal evaluation prevents hasty recovery actions for intermittent failures, ensuring that recovery procedures are only initiated when there is conclusive evidence of sustained beam failure, thereby eliminating unnecessary recovery processes.
3Reliability
If beam failure instance counter is reset after recovery procedure, then false failures from intermittent issues are reduced, but actual failure tracking may be lost
Solution Approach 1:
The patent applies local quality by selectively resetting the beam failure instance counter only under specific conditions rather than universally. The counter is reset when a beam failure recovery procedure is successfully completed or when timing criteria indicate that failures were intermittent. However, the counter continues to track failures that occur outside these specific conditions, preserving the ability to detect genuine sustained failures. This localized reset approach maintains failure history tracking where needed while eliminating false positives where appropriate.
Data Source
Figure 1A
Figure 1B
Figure 2A
AI summary
The present invention provides user equipment and a beam failure recovery method. The beam failure recovery method for user equipment (UE), includes: receiving indication of beam failure instance; accumulating the number of received indications so as to obtain an accumulative value; initiating a beam failure recovery procedure when the accumulative value is greater than a first threshold; and skipping processing the received indication of beam failure instance during the beam failure recovery period. Thus, it is possible to eliminate false beam failures.