TRP-Specific Beam Failure Recovery in 5G M-TRP Systems
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Solution Overview
Problem
Current 5G communication systems face challenges in accurately detecting and recovering from beam failures in Multiple Transmission and Reception Points (M-TRP) scenarios, particularly in distinguishing which TRP a failed beam corresponds to and selecting an optimized replacement beam, leading to suboptimal data throughput.
Innovation Solution
The method involves receiving reference signals from multiple TRPs, determining beam failure instances, and implementing a TRP-specific beam failure recovery process by updating counters and performing recovery procedures based on signal power thresholds and timing windows, allowing for per-TRP beam failure detection and recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If beam failure detection is performed in M-TRP scenarios using conventional methods, then the system can detect beam failures, but it cannot accurately distinguish which TRP the failed beam corresponds to, leading to suboptimal recovery
Solution Approach 1:
The patent segments the beam failure detection process by TRP, maintaining separate BFI counters (e.g., BFI counter 402 for first TRP, BFI counter 404 for second TRP) and separate timing windows for each TRP. This segmentation enables independent tracking of beam failure instances for each TRP, allowing accurate identification of which specific TRP experienced the failure while maintaining overall system detection capability.
2Productivity
If a single beam failure counter is used for multiple TRPs, then the detection process is simpler, but the recovery process cannot be optimized for individual TRPs
Solution Approach 1:
The patent applies local quality by configuring different parameters (counter thresholds, timing window durations) for each TRP based on their specific characteristics. For example, the first TRP may have a BFI counter threshold of 3 with a 10ms timing window, while the second TRP has a threshold of 5 with a 15ms window. This allows each TRP to be optimized independently for maximum data throughput while the overall system complexity remains manageable through standardized management procedures.
3Reliability
If beam failure recovery is performed without TRP-specific tracking, then the recovery process is faster, but network scheduling may depend on failed TRPs reducing overall efficiency
Solution Approach 1:
The patent implements preliminary action by pre-configuring TRP-specific parameters including BFI counter thresholds, timing window durations, and replacement beam configurations for each TRP before beam failures occur. This preparation enables immediate TRP-specific recovery actions when failures are detected, ensuring scheduling reliability is maintained while minimizing recovery time through pre-planned recovery procedures for each TRP.
Data Source
AI summary
A method of implementing beam failure recovery for a multi-transmission-and-reception-point (M-TRP) transmission including a first transmission from a first TRP and a second transmission from a second TRP may include: receiving a first set of reference signals (RSs) corresponding to the first TRP and a second set of RSs corresponding to the second TRP; determining that the first set of RSs indicates a beam failure instance (BFI) specific to the first TRP, and responsively updating a first BFI counter specific to the first TRP; determining that a beam failure with respect to the first TRP has occurred based on a count of the first BFI counter equaling or surpassing a first BFI counter threshold; and performing a BFR process for the first TRP responsive to determining that the beam failure with respect to the first TRP has occurred.