TRP-Level Beam Failure Detection for Partial Beam Loss
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In multiple transmission reception points (TRP) operation, if only part of the beams fail, the terminal equipment may not trigger beam failure detection, and if beam failure detection is not distinguished between a cell level or a TRP level, resources may be wasted.
Innovation Solution
A method and apparatus for detecting beam failure that includes a receiving unit to receive a beam failure instance indication, increment a TRP-specific beam failure indication count, and determine beam failure or trigger beam failure recovery when the count exceeds a maximum, allowing for TRP-level detection independent of cell-level detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam failure detection is performed at cell level only, then the detection mechanism is simple, but beam failure cannot be detected when only part of the beams fail
Solution Approach 1:
The patent segments the beam failure detection mechanism into two independent levels: cell-level detection and TRP-level detection. Each level maintains its own counter (BFI_COUNTER for cell-level, and TRP-specific counters for TRP-level) and detection logic. This segmentation allows the system to detect partial beam failures at the TRP level while maintaining the overall simple cell-level detection mechanism, thereby improving detection accuracy without significantly increasing system complexity.
2Reliability
If TRP-level beam failure detection is added, then partial beam failures can be detected, but resource waste occurs without proper distinction between cell and TRP levels
Solution Approach 1:
The patent applies local quality by making the beam failure detection mechanism adaptive to the specific failure scenario. When a beam failure is detected at the TRP level, only the affected TRP undergoes recovery procedures while other TRPs continue normal operation. This localized response prevents unnecessary resource consumption across the entire cell, allowing the system to detect partial failures and respond only where needed.
Solution Approach 2:
The patent introduces dynamic behavior by allowing the detection and recovery mechanisms to adapt based on the failure scope. The system dynamically determines whether to trigger cell-level or TRP-level recovery procedures based on the detected failure pattern. This dynamic approach ensures that resources are consumed only when and where necessary, preventing waste while maintaining reliable detection of partial failures.
3Reliability
If cell-level beam failure recovery is triggered, then comprehensive recovery is ensured, but recovery resources are wasted when only partial failure occurs
Solution Approach 1:
The patent segments the recovery mechanism into cell-level recovery and TRP-level recovery. When a beam failure is detected, the system determines the scope of failure and triggers only the appropriate recovery level. If the failure is confined to a specific TRP, only that TRP undergoes recovery procedures. This segmentation ensures comprehensive recovery for the affected area while avoiding unnecessary recovery actions for unaffected areas, thereby improving resource utilization efficiency.
Solution Approach 2:
The patent changes the recovery scope parameter dynamically based on the detected failure pattern. Instead of always triggering full cell-level recovery, the system adjusts the recovery scope to match the actual failure extent. This parameter change allows the system to maintain reliable recovery for the affected TRP while avoiding the resource consumption associated with unnecessary cell-level recovery procedures.
Data Source
AI summary
A method and an apparatus for detecting beam failure. The method comprises: receiving a beam failure instance indication by a medium access control (MAC) entity of a terminal equipment, incrementing a transmission reception point (TRP)-specific beam failure indication count by 1, and in a case where the TRP-specific beam failure indication count is greater than or equal to a TRP-specific beam failure instance maximum count, determining that a beam failure occurs in a transmission reception point or beam failure recovery (BFR) of the transmission reception point is triggered or a beam failure indication of the transmission reception point is triggered.