5G NR Beam Failure Detection Using Interference Differentiation
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Solution Overview
Problem
Existing wireless communication systems, particularly in 5G NR, face challenges in effectively detecting and mitigating beam failures due to interference, which can lead to inefficient resource utilization and increased power consumption.
Innovation Solution
Implementing a method that involves receiving beam failure detection-reference signals (BFD-RS) to calculate RSSI, SNR, or RSRP values, storing beam failure indicators (BFIs), and using timers and counters to manage beam failure recovery (BFR) procedures based on these metrics, distinguishing between interference-related and quality-related BFIs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam failure detection is performed using traditional methods without interference differentiation, then beam failure can be detected, but unnecessary beam failure recovery procedures are triggered due to temporary interference
Solution Approach 1:
The patent segments beam failure indicators into two distinct categories: interference-related BFIs and quality-related BFIs. This segmentation is achieved by evaluating multiple metrics (RSSI, SNR, RSRP) and using logical conditions to classify the root cause of beam failure. By dividing the failure detection into separate categories, the system can selectively trigger recovery procedures only for quality-related failures, avoiding unnecessary resource consumption from interference-related false alarms.
2Reliability
If beam failure recovery procedures are triggered for all beam failure indicators, then beam reliability is improved, but power consumption increases due to unnecessary recovery operations
Solution Approach 1:
The patent segments beam failure indicators into interference-related and quality-related categories through multi-metric evaluation. By classifying BFIs based on the relationship between RSSI, SNR, and RSRP values, the system selectively triggers recovery procedures only for quality-related failures, thereby maintaining beam reliability while avoiding unnecessary power consumption from spurious recovery operations caused by temporary interference.
Solution Approach 2:
The patent converts the potentially harmful effect of temporary interference (which triggers false beam failure detections) into a beneficial classification mechanism. By using interference detection as a criterion to distinguish between interference-related and quality-related BFIs, the system transforms what would be a source of errors into a useful diagnostic tool that prevents unnecessary recovery operations and saves power.
3Measurement precision
If multiple metrics (RSSI, SNR, RSRP) are evaluated to differentiate interference from quality issues, then detection accuracy is improved, but system complexity increases
Solution Approach 1:
The patent segments the detection process into distinct evaluation stages: first evaluating RSSI to detect interference levels, then evaluating SNR and RSRP to assess signal quality. This segmented approach with clear decision boundaries (comparing metrics against thresholds and evaluating their relationships) improves measurement precision while keeping the system complexity manageable through structured, step-by-step analysis.
Data Source
AI summary
A UE may receive a BFD-RS and calculate, based on the BFD-RS, one or more of a value of an RSSI or at least one of a value of an SNR or a value of an RSRP, such that the UE may report a BFI based on the calculated values. The UE may initiate at least one of a total BFI timer or a consecutive BFI timer when a first BFI of a plurality of BFIs is stored, and increment at least one of a total BFI counter or a consecutive BFI counter when each of the plurality of BFIs is stored. A BFD procedure may be performed if at least one of the total BFI counter is greater than or equal to a maximum total count or the consecutive BFI counter is greater than or equal to a maximum consecutive count prior to an expiration of respective BFI timers.