Beam Failure Recovery Rules Across Beam Groups and Cells in Multi-TRP Links
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Solution Overview
Problem
In wireless communication systems, particularly with multi-TRP configurations, efficient detection and recovery from beam failures are challenging due to changes in the radio environment, leading to communication failures between user equipment (UE) and base stations.
Innovation Solution
Implementing beam failure detection (BFD) and recovery (BFR) mechanisms that utilize per-beam group and cell-level parameters, allowing dynamic configuration and predefined settings to enhance communication reliability and efficiency by identifying and recovering from beam failures in multi-TRP scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam failure detection and recovery mechanisms are implemented in multi-TRP configurations, then communication reliability is improved, but device complexity and configuration management difficulty increase
Solution Approach 1:
The patent segments the beam failure recovery procedure into distinct phases: beam failure detection, beam failure recovery request transmission, and beam failure recovery confirmation. Each phase has specific parameters and procedures that can be independently configured and managed. This segmentation allows the system to handle complex multi-TRP scenarios by breaking down the overall complexity into manageable segments that can be processed separately.
Solution Approach 2:
The patent introduces dynamic configuration parameters that allow the beam failure recovery behavior to adapt based on the specific multi-TRP scenario. The network can dynamically adjust parameters such as the beam failure detection threshold, the recovery request timing, and the resource allocation for recovery transmissions. This dynamic approach enables the system to optimize reliability for each specific configuration without requiring static complex setup for all possible scenarios.
2Measurement precision
If per-beam group and cell-level parameters are used for beam failure detection, then detection precision is improved, but the quantity of configuration parameters increases
Solution Approach 1:
The patent designs the configuration parameters to serve multiple functions simultaneously. For example, the beam failure detection parameters can be configured at both beam group level and cell level, allowing the same parameter set to govern multiple beams or multiple cells depending on the configuration. This universality reduces the total number of parameters needed while maintaining precise detection capability across different granularity levels.
Solution Approach 2:
The patent merges the configuration of beam group-level parameters and cell-level parameters into a unified configuration framework. Rather than treating them as completely separate configuration sets, the system allows parameters to be inherited or shared between levels. For instance, cell-level parameters can serve as defaults for beam groups, reducing redundancy. This merging approach maintains detection precision while reducing the overall quantity of configuration parameters.
Data Source
AI summary
In operation, the UE in the cell (SpCell/SCell) may be configured to operate with beam group specific BFRs, cell-level BFRs, or combinations of them under a beam failure configuration that is determined according to various rules. A method of wireless communication performed by a user equipment (UE) and a UE is disclosed. The method includes determining a beam failure configuration for a serving cell, the beam failure configuration including at least one of a beam failure parameter of a beam group or a beam failure parameter of a cell; and detecting, in the serving cell based at least in part on the beam failure configuration, a beam failure recovery (BFR) based at least in part on the beam failure configuration. The beam failure configuration is determined based on various rules that control the operation of the BFR.