Wireless Node Beam Failure Recovery via Dynamic Reference Signal Selection
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Solution Overview
Problem
Current wireless communication systems, particularly in NR (New Radio) systems, face inefficiencies in beam management and link recovery due to reliance on network-side configuration of reference signal resources, which limits inter-cell mobility and increases hardware complexity and costs.
Innovation Solution
A method where a wireless communication node assesses reference signal resource sets, adjusts counters based on link quality, and transmits specific radio signals for beam management and failure recovery, influencing the selection of reference signal resources to optimize beam management and reduce signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UE relies on network-side configuration of reference signal resources for beam management and link recovery, then the beam failure recovery procedure can be performed, but the inter-cell mobility is limited and hardware complexity increases
Solution Approach 1:
The UE autonomously determines the reference signal resource set for beam failure recovery by selecting from candidate reference signal resources based on beam management information, without requiring explicit network configuration. This self-service approach enables the UE to independently perform inter-cell mobility and link recovery, reducing dependency on network-side configuration and lowering hardware complexity.
Solution Approach 2:
The candidate reference signal resources are configured to serve multiple purposes: they are used for beam management procedures and simultaneously for beam failure recovery. This multi-functionality eliminates the need for separate dedicated reference signal resources for BFR, reducing hardware complexity while maintaining inter-cell mobility capabilities.
2Productivity
If the network configures reference signal resource sets for beam management, then beam management can be performed, but the beam failure recovery efficiency is reduced due to lack of dynamic adaptation
Solution Approach 1:
The reference signal resource set for beam failure recovery is dynamically determined by the UE based on beam management information and candidate reference signal resources, rather than being fixed by network configuration. This dynamic adaptation allows the UE to select optimal reference signal resources in real-time, significantly improving beam failure recovery efficiency.
Solution Approach 2:
The UE uses beam management information as feedback to determine the reference signal resource set for beam failure recovery. This feedback mechanism ensures that the BFR procedure leverages the most relevant beam management data, optimizing recovery efficiency without requiring additional network configuration.
3Reliability
If separate reference signal resources are configured for beam management and beam failure recovery, then both functions can be performed, but signaling overhead increases
Solution Approach 1:
The patent merges the reference signal resource configuration for beam management and beam failure recovery into a single unified structure. The candidate reference signal resources are configured to serve both purposes, eliminating the need for separate resource sets and reducing signaling overhead while maintaining complete functionality for both beam management and BFR.
Solution Approach 2:
The reference signal resources are designed with multi-functionality, serving as both beam management reference signals and beam failure recovery reference signals. This universality reduces the total number of resources that need to be configured and signaled, decreasing signaling overhead while ensuring reliable operation of both functions.
Data Source
AI summary
A communication node receives a first message, and the first message is used to determine a first reference signal resource set; whenever first-type radio link quality assessed based on the first reference signal resource set is worse than a first threshold, increases a first counter by 1; and transmits a first radio signal for beam management, and the first radio signal indicates a first reference signal resource; determines a second reference signal resource set from a first candidate reference signal resource pool based on at least the first reference signal resource; as a response to the first counter reaching a first value, transmits a second radio signal, the second radio signal is used for beam failure recovery, and the second radio signal indicates a second reference signal resource; the second reference signal resource belongs to the second reference signal resource set. This optimizes the beam management procedure for multi-TRP.