Beam Link Recovery Mapping for Multi-TRP Beam Failure
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Solution Overview
Problem
In multi-TRP (M-TRP) scenarios, there is a lack of technical solutions for determining which channel and/or reference signal to adopt the qnew for beam failure recovery (BFR) in the multi-DCI (M-DCI) scenario, where each TRP sends its own transmission resource indication and TCI state.
Innovation Solution
A link recovery method and apparatus that allows a terminal to determine at least one qnew based on multiple candidate beam reference signal sets, using unified TCI states and CORESET pool indexes to improve the success rate of TRP-based beam failure recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple candidate beam reference signal sets are used for beam failure recovery in M-TRP scenarios, then the success rate of beam failure recovery is improved, but the device complexity increases due to the need to manage multiple sets and determine appropriate qnew for different channels and reference signals
Solution Approach 1:
The patent segments the candidate beam reference signal sets by associating each set with a specific CORESETPoolIndex. This segmentation allows the terminal to selectively manage and determine qnew values for different TRPs independently, reducing the overall complexity of managing multiple beam failure recovery configurations while maintaining high recovery success rates.
Solution Approach 2:
The patent applies local quality by configuring different candidate beam reference signal sets for different CORESETPoolIndexes (i.e., different TRPs). Each TRP has its own specialized beam reference signal set, allowing optimized beam failure recovery for each TRP while avoiding the need to manage all possible beams globally, thus reducing system complexity.
2Adaptability or versatility
If unified TCI states are configured for multiple channels and reference signals, then the adaptability of the system is improved, but the difficulty of detecting and measuring the appropriate qnew for each channel increases
Solution Approach 1:
The patent applies local quality by establishing a correspondence between TCI states and CORESETPoolIndexes. Each CORESETPoolIndex has its own TCI state configuration, allowing the terminal to determine the appropriate qnew for target channels and reference signals based on the specific CORESETPoolIndex, thereby reducing the difficulty of detection and measurement while maintaining adaptability.
Solution Approach 2:
The patent introduces CORESETPoolIndex as an intermediary that mediates between the unified TCI state configuration and the specific channels/reference signals. This intermediary provides a clear mapping relationship, making it easier for the terminal to detect and measure the appropriate qnew values without directly managing complex relationships between all channels and reference signals.
Data Source
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AI summary
The present application relates to the technical field of communications. Provided are a link recovery method and an apparatus. The method comprises: determining at least one qnew from a first candidate beam reference signal set and a second candidate beam reference signal set, wherein the qnew is used for indicating transmission using a beam that corresponds to the qnew; and determining a qnew that corresponds to a target channel and/or target reference signal. In the technical solution of the present application, in an M-TRP scenario, a terminal device is able to determine at least one qnew on the basis of a plurality of candidate beam reference signal sets, and determine a target channel and/or target reference signal by using the qnew, such that a beam failure recovery success rate based on TRP can be improved.