TRP Beam Failure Recovery with Segmented Counters
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Solution Overview
Problem
Current 5G technology lacks specified solutions for beam failure detection and recovery procedures in transmission reception points (TRPs), particularly for scenarios involving multiple TRPs, leading to unclear UE and BS behaviors and unsolved issues in TRP beam failures.
Innovation Solution
A method and apparatus for a UE and network device to receive configuration information, detect beam failures, and trigger a beam failure recovery (BFR) procedure by transmitting a BFR request to the serving cell, which includes specific fields like TRP identifiers, failure indicators, and priority handling for multiple TRPs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam failure detection and recovery procedures are implemented for multiple TRPs, then communication reliability is improved, but system complexity increases due to multiple failure detection and recovery scenarios
Solution Approach 1:
The patent segments the beam failure recovery process by introducing separate counters (BFD-RS counter, SSB counter, CSI-RS counter) for different reference signal types and separate recovery procedures for different TRPs. This segmentation allows independent tracking and recovery for each TRP and reference signal type, improving reliability while managing complexity through modular counter management
Solution Approach 2:
The patent adds a new dimension to the beam failure detection by introducing TRP-specific identification to the existing beam failure counter mechanism. Instead of a single unified counter, the system now maintains counters differentiated by TRP ID and reference signal type, creating a multi-dimensional counter structure that tracks failures across multiple TRPs independently
2Measurement precision
If separate counters are maintained for different TRPs and reference signal types, then beam failure detection precision is improved, but information processing overhead increases
Solution Approach 1:
The patent segments the counter information into distinct categories: BFD-RS counters per TRP, SSB counters per TRP, and CSI-RS counters per TRP. Each segment tracks specific failure instances independently, enabling precise detection while allowing the system to process only relevant counter data for each TRP scenario, reducing unnecessary information processing
Solution Approach 2:
The patent applies local quality by configuring different counter parameters and thresholds for different TRPs and reference signal types based on local requirements. Each TRP can have customized counter settings optimized for its specific channel conditions and service requirements, improving detection precision locally while avoiding uniform complex processing across all TRPs
3Speed
If beam failure recovery procedures are triggered for each TRP independently, then recovery speed is improved, but control signaling overhead increases
Solution Approach 1:
The patent segments the recovery triggering mechanism into TRP-independent and TRP-specific components. The MAC entity maintains independent counters for each TRP that can autonomously trigger recovery procedures when thresholds are met, enabling fast independent recovery while the network configures unified counter parameters through RRC signaling, balancing speed and overhead
4Ease of manufacture
If unified counter parameters are configured for all TRPs, then configuration simplicity is maintained, but adaptability to different TRP scenarios decreases
Solution Approach 1:
The patent implements universality by designing a counter configuration framework that can operate in multiple modes: unified configuration for all TRPs when conditions are similar, and TRP-specific configuration when conditions differ. The same counter mechanism and triggering logic serve both unified and differentiated scenarios, providing configuration simplicity when needed while enabling adaptability when required
Data Source
AI summary
Embodiments of the present application relate to methods and apparatuses for a transmission reception point (TRP) related beam failure detection and recovery procedures under a 3rd Generation Partnership Project (3GPP) 5G system or the like. According to an embodiment of the present application, a method can be performed by a user equipment (UE) and include: receiving, from a serving cell, configuration information related to at least one transmission reception point (TRP) of the serving cell; detecting a beam failure of a TRP; and triggering a beam failure recovery (BFR) procedure, wherein the BFR procedure includes transmitting a BFR request to the serving cell, and wherein the BFR request includes information per TRP associated with the at least one TRP of the serving cell. If the configuration information is related to at least two TRPs of the serving cell, before transmitting the BFR request, the UE may detect a further beam failure of a further TRP. The UE may trigger a further BFR procedure.