TRP-Specific Beam Failure Detection Reference Signal Determination
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Solution Overview
Problem
In wireless communication systems, particularly in multi-TRP configurations, existing methods are inadequate for efficiently detecting beam failures and recovering from them, leading to communication disruptions due to degraded channel quality across multiple transmission-reception points.
Innovation Solution
A method and system for monitoring beam failure detection reference signals (BFD RSs) across a group of beams, measuring the reference signal received power (RSRP), and triggering a beam failure recovery (BFR) process when the RSRP falls below a threshold, enabling per-TRP beam failure detection and recovery in multi-TRP configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam failure detection is performed in multi-TRP configurations using existing methods, then communication coverage is maintained, but beam failure detection accuracy deteriorates due to degraded channel quality across multiple TRPs
Solution Approach 1:
The patent segments the beam failure detection process by introducing TRP-specific BFD reference signals for different transmission reception points. Each TRP (first TRP and second TRP) has its own BFD RS resources, allowing independent monitoring of beam quality for each TRP. This segmentation enables precise identification of which specific TRP's beam has failed, improving detection accuracy in multi-TRP configurations while maintaining communication reliability through targeted recovery procedures.
2Reliability
If beam failure recovery is triggered based on RSRP threshold, then communication disruptions are reduced, but false triggering increases due to temporary channel fluctuations
Solution Approach 1:
The patent implements preliminary action by configuring multiple BFD RS resources associated with different TRPs before beam failure occurs. The UE monitors these pre-configured BFD RS resources continuously and measures RSRP for each TRP separately. This allows the system to distinguish between temporary channel fluctuations affecting one TRP and actual beam failure, reducing false triggering of BFR procedures while maintaining communication continuity through early detection of genuine failures.
3Measurement precision
If group beam monitoring is implemented across multiple TRPs, then detection coverage is improved, but processing complexity increases
Solution Approach 1:
The patent reduces processing complexity through segmentation by associating each BFD RS resource with a specific TRP identifier. The UE monitors BFD RS resources in a segmented manner, where each resource corresponds to a specific TRP (first TRP or second TRP). This segmented approach allows the UE to process and evaluate RSRP measurements for each TRP independently, improving monitoring coverage across multiple TRPs while managing processing complexity through organized, TRP-specific resource handling.
Data Source
AI summary
In accordance with some aspects, a method of wireless communication performed by a user equipment (UE) is disclosed. The method includes monitoring for beam failure detection (BFD) reference signals (RSs) for a group of beams of a serving cell, the group of beams associated with a group beam identifier; measuring, based on the monitoring for the BFD RSs, a reference signal received power (RSRP) of one or more of the BFD RSs; and triggering, based on the RSRP being below a threshold, a beam failure recovery (BFR) process for the group of beams.