Beam Failure Recovery Requests With Multiple Replacement Beams
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing beam failure recovery in multi-TRP scenarios, particularly in identifying and switching to alternative network beams to maintain communication connectivity.
Innovation Solution
The implementation of a method and apparatus for wireless communications that involves outputting a beam failure recovery request (BFRQ) indicating both a first and a second network beam based on a detected beam failure, allowing for concurrent communication with multiple TRPs using UE beams, and receiving a beam failure recovery response (BFRR) to facilitate seamless beam switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the system uses a single beam pair link for communication with a TRP, then the communication setup is simple and manageable, but the system lacks resilience and cannot maintain connectivity during beam failures
Solution Approach 1:
The patent combines multiple beam pair links (first beam pair link to first TRP, second beam pair link to second TRP) into a unified communication framework. The UE maintains concurrent beam pair links with multiple TRPs, allowing communication to continue through alternative beams when one beam fails, thus improving reliability while managing complexity through systematic beam configuration
Solution Approach 2:
The system pre-configures multiple beam pair links and alternative network beams before beam failure occurs. The UE is configured with multiple UE beams and network beam associations in advance, enabling rapid beam switching and recovery without requiring complex real-time decision-making when failure occurs
2Productivity
If the UE reports only a single network beam in BFRQ, then the signaling overhead is reduced, but the system cannot efficiently establish concurrent communication with multiple TRPs
Solution Approach 1:
The patent extends the BFRQ signaling from a single-dimension (one beam) to multi-dimension by incorporating multiple network beam indications. The UE includes first and second network beam identifiers in the BFRQ, along with associations to different TRPs and UE beams, enabling the network to recover multiple beam pair links simultaneously through enhanced signaling information
Solution Approach 2:
The BFRQ mechanism is enhanced to serve multiple functions: indicating primary beam failure, suggesting alternative beams for the same TRP, and proposing beams for additional TRPs. This multi-functional BFRQ enables comprehensive beam recovery and establishment of diverse beam pair links in a single signaling operation
3Reliability
If the system establishes beam pair links with multiple TRPs, then communication resilience and continuity are improved, but the complexity of beam configuration and management increases
Solution Approach 1:
The patent segments the beam management system into distinct TRP-specific configurations. Each TRP has its own beam pair link, UE beam associations, and recovery procedures. This segmentation allows independent management and optimization of each beam link while maintaining overall system resilience through diversity across multiple TRPs
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may communicate with a wireless network using multiple beams. For example, the UE may communicate with different transmission/reception points (TRPs) using different beams, communicate using different downlink and uplink beams, communicate using different beams in different component carriers (CCs), or any combination thereof. If the UE detects a single beam failure, the UE may indicate multiple new beams in a beam failure recovery request (BFRQ). The UE may select a new beam based on the detected beam failure and may determine one or more additional new beams (e.g., for a different TRP, link direction, or CC than the failed beam) that are compatible with the selected new beam to further indicate in the BFRQ. The UE may receive a beam failure recovery response (BFRR) in response to the BFRQ and may communicate using the new beams.