PCell Beam Failure Recovery Across Multi-TRP CORESET Pools
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems with multi-transmission/reception points, existing beam failure recovery (BFR) procedures are inefficient, leading to potential complete communication loss between the user equipment (UE) and the primary cell (PCell) when beams fail at multiple transmission/reception points (TRPs), as the UE waits for beam failure on each TRP before initiating recovery.
Innovation Solution
Implement per-TRP BFR procedures at the PCell configured with two control resource set (CORESET) pool index values, allowing the UE to detect beam failures on active beams and select new candidate beams from subsets associated with each CORESET pool index, transmitting access messages to establish new active beams with corresponding TRPs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the UE waits for beam failure on each TRP before initiating recovery, then the BFR procedure can be simplified, but the communication reliability deteriorates due to potential complete communication loss
Solution Approach 1:
The patent segments the BFR procedure into per-TRP operations by introducing CORESET pool index values (first and second) that associate with different TRPs. This allows the UE to independently detect and recover from beam failures at each TRP separately, rather than waiting for all TRPs to fail before initiating recovery, thus maintaining communication reliability while managing procedure complexity through structured segmentation.
2Productivity
If per-TRP BFR procedures are implemented with multiple CORESET pool indices, then the beam failure recovery efficiency is improved, but the device complexity increases
Solution Approach 1:
The patent applies local quality by assigning different CORESET pool index values (first and second) to different TRPs, allowing each TRP to have its own beam failure detection and recovery characteristics. This enables the UE to configure and manage beam failure recovery parameters specifically for each TRP's local conditions, improving recovery efficiency while the structured indexing system manages the resulting configuration complexity.
3Reliability
If the UE monitors multiple candidate beams from different subsets, then the communication reliability is improved, but the measurement and detection difficulty increases
Solution Approach 1:
The patent segments candidate beams into distinct subsets (first subset and second subset) associated with different CORESET pool indices and TRPs. This segmentation allows the UE to organize and monitor candidate beams in a structured manner, measuring and evaluating them within defined groups rather than as a single complex set, thereby improving connection reliability while managing measurement complexity through systematic organization.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a configuration for a carrier associated with a primary cell (PCell), the carrier configured with a first control resource set (CORESET) pool index value and a second CORESET pool index value. The UE may receive an indication of a set of candidate beams available for a beam failure recovery (BFR) procedure, the set of candidate beams comprising a first subset of candidate beams associated with the first CORESET pool index value and a second subset of candidate beams associated with the second CORESET pool index value. The UE may detect a beam failure on the carrier on an active beam of the primary cell that is associated with the first CORESET pool index value or the second CORESET pool index value. The UE may select a new candidate beam from the set of candidate beams.