Beam Failure Recovery Using Paired BFD and NBI Reference Sets
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently recovering from beam failures, particularly in high-frequency 5G/NR networks, where directional beams can lead to sudden link quality drops, resulting in service interruptions.
Innovation Solution
The implementation of enhanced beam failure recovery (BFR) mechanisms involving the configuration of multiple beam failure detection (BFD) and new beam identification (NBI) reference signal sets, allowing for timely detection and recovery of beam failures by identifying and switching to new beams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple BFD and NBI reference signal sets are configured for beam failure detection and recovery, then beam failure recovery reliability is improved, but device complexity increases
Solution Approach 1:
The reference signal resources are segmented into multiple BFD RS sets and NBI RS sets, where each BFD RS set is one-to-one associated with a corresponding NBI RS set. This segmentation allows the system to detect beam failures for different beams independently and perform targeted recovery, improving reliability while managing complexity through structured organization.
Solution Approach 2:
The system performs preliminary configuration of multiple BFD RS sets and NBI RS sets before beam failure occurs. The base station configures these reference signal resources in advance, establishing the one-to-one association between BFD and NBI sets, so that when beam failure detection is needed, the UE can immediately use the pre-configured sets without additional signaling overhead.
2Measurement precision
If one-to-one association between BFD RS sets and NBI RS sets is implemented, then beam failure detection precision is improved, but signaling overhead increases
Solution Approach 1:
The one-to-one association between BFD RS sets and NBI RS sets creates a universal framework where each detection set has a dedicated recovery set. This multi-functional structure allows the same association mechanism to serve multiple beams simultaneously, improving detection precision while reusing the same signaling patterns across different beam pairs, thereby managing overhead efficiently.
Data Source
AI summary
Methods and apparatuses for beam failure recovery (BFR) in a wireless communication system. A method for operating a user equipment includes identifying configuration information for at least two beam failure detection (BFD) reference signal (RS) sets each comprising one or more BFD RSs resources and configuration information for at least two new beam identification (NBI) RS sets each comprising one or more NBI RS resources. The method further includes detecting a beam failure event for one of the at least two BFD RS sets; identifying, based on measuring the one or more NBI RS resources in a NBI RS set that is associated with the one BFD RS set, one or more NBI RS resources for a new beam recovery; and triggering, in response to detection of the beam failure event for the one BFD RS set and identification of the one or more NBI RS resources, a BFR event.