Multi-TRP Beam Failure Recovery with BFD-RS Event Segmentation
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Solution Overview
Problem
In multi-TRP scenarios, existing technologies are unclear on how to determine beam failure events, hindering effective beam failure recovery mechanisms.
Innovation Solution
A method involving beam failure detection reference signals (BFD RS) is used to measure and determine beam failure events, allowing for beam failure recovery requests (BFRQ) to be sent using contention-free or contention-based random access resources, with specific procedures for handling different cases of beam failures across primary and secondary cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a beam failure recovery mechanism is introduced in multi-TRP scenarios, then data transmission reliability is improved, but the system complexity increases due to unclear beam failure event determination
Solution Approach 1:
The patent segments the beam failure detection process by introducing separate beam failure detection reference signals (BFD-RS) for each TRP. This allows independent monitoring of beam conditions for each transmission reception point, enabling precise identification of which specific TRP experiences beam failure without requiring complex system-wide analysis.
Solution Approach 2:
The patent implements preliminary beam failure detection by continuously monitoring BFD-RS signals from multiple TRPs before actual beam failure occurs. This proactive detection mechanism triggers recovery procedures in advance, preventing complete transmission failure and reducing the need for complex post-failure recovery operations.
2Measurement precision
If beam failure detection reference signals are measured for multiple TRPs, then beam failure identification accuracy is improved, but the measurement and detection difficulty increases
Solution Approach 1:
The patent introduces beam failure detection reference signals (BFD-RS) as intermediary measurement objects between the terminal and multiple TRPs. These standardized reference signals provide a uniform interface for measuring beam quality across different TRPs, simplifying the detection process while maintaining high identification accuracy through consistent measurement criteria.
Solution Approach 2:
The patent changes the measurement parameters by using specific reference signal configurations (BFD-RS) with defined time-frequency resources and signal structures. This standardization transforms complex multi-TRP beam quality assessment into manageable parameter comparisons, where terminals evaluate reference signal received power (RSRP) or quality (RSQ) against threshold values.
Data Source
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AI summary
Provided in embodiments of the present invention are a beam failure recovery method and terminal, and a network device. The beam failure recovery method comprises: measuring a BFD RS, the BFD RS corresponding to multiple pieces of first object information, and the first object information comprising at least one among the following: a TRP identifier, CORESETPoolIndex information, a group identifier, a cell identifier, and PCI; according to the measurement result for the BFD RS, determining a target event; and sending BFRQ information.