Wireless Beam Failure Recovery Coordination
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Solution Overview
Problem
In wireless communication systems, particularly in 5G NR, the management of beam selection and beam failure recovery can lead to conflicts due to incomplete procedures, resulting in network inconsistencies and data interruptions, especially when multiple methods for beam selection and recovery are triggered simultaneously.
Innovation Solution
A method where a first message is transmitted on a first channel based on the existence of an incomplete beam failure recovery procedure, allowing for coordinated beam selection management to avoid conflicts and ensure seamless beam switching by determining whether the first message is transmitted based on the completion or cancellation of the beam failure recovery process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam failure recovery procedure is initiated, then beam reliability is improved, but transmission latency increases due to incomplete procedures
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple candidate beams and their associated reference signals before beam failure occurs. When beam failure is detected, the UE can immediately switch to a pre-prepared candidate beam without initiating a complete recovery procedure, thus maintaining reliability while reducing the time penalty associated with beam switching.
Solution Approach 2:
The patent enables skipping of the complete beam failure recovery procedure by allowing direct transmission of beam selection management messages using candidate beams when certain conditions are met. This rushes through the normally lengthy recovery process by eliminating unnecessary steps when the situation allows, thereby reducing latency while preserving reliability.
2Adaptability or versatility
If multiple beam selection methods are triggered simultaneously, then beam selection adaptability is improved, but system consistency deteriorates due to conflicts
Solution Approach 1:
The patent applies preliminary anti-action by establishing a priority scheme and conflict resolution rules before multiple beam selection methods can be triggered simultaneously. The network configures the UE with ordered lists of candidate beams from different methods, and predefined rules determine which method takes precedence, thereby preventing consistency conflicts while maintaining the adaptability benefits of multiple methods.
Solution Approach 2:
The patent introduces an intermediary mechanism in the form of a unified beam selection management procedure that coordinates multiple beam selection methods. This intermediary layer reconciles conflicts between different methods by applying network-configured priorities and rules, allowing the system to leverage multiple methods for adaptability while ensuring consistent behavior through centralized coordination.
3Reliability
If beam failure recovery procedure is completed, then beam reliability is improved, but signaling load increases
Solution Approach 1:
The patent extracts the essential beam switching function from the complete beam failure recovery procedure. By separating the critical beam selection and switching actions from the full recovery protocol, the system can achieve beam reliability improvement with minimal signaling overhead, taking out only the necessary elements required for successful beam transition.
Solution Approach 2:
The patent employs lightweight, temporary beam selection messages that can be quickly transmitted and discarded once beam switching is accomplished. These simplified messages serve the purpose of beam coordination without the overhead of complete recovery procedures, acting as disposable signaling elements that achieve reliability with minimal resource consumption.
4Measurement precision
If network configuration is required for beam methods, then beam selection precision is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by designing a unified beam selection management framework that handles multiple beam selection methods through a single standardized procedure. The network configures a comprehensive set of candidate beams and rules that work across different scenarios, allowing precise beam selection without requiring separate complex configurations for each method, thereby reducing device complexity while maintaining precision.
Data Source
AI summary
The present application provides a method and device for wireless communications, comprising determining a first reference signal resource for beam selection management; determining whether a first message is transmitted on a first channel according to at least whether there exists an incomplete beam failure recovery procedure, the first message indicating the first reference signal resource; wherein a transmission of the first message is for the beam selection management. The method proposed in the present application can achieve simultaneous running of beam failure recovery and beam selection management.