Component Carrier Group Beam Failure Recovery for Lower Latency
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Solution Overview
Problem
Existing wireless communication systems, particularly 5G NR, face challenges in efficiently detecting and recovering from beam failures across multiple component carriers, leading to potential radio link failures and increased latency.
Innovation Solution
Implementing joint beam failure detection and recovery techniques for a group of component carriers by monitoring reference signals, generating a beam failure recovery request (BFRQ) when a subset of carriers fail, and triggering recovery for the entire group, thereby reducing latency and resource overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate beam failure detection is performed for each component carrier, then detection accuracy for individual carriers is improved, but system complexity and processing overhead increase
Solution Approach 1:
The patent combines beam failure detection across multiple component carriers into a unified process. The network device performs joint detection on reference signals from multiple carriers to determine overall beam failure status, rather than treating each carrier independently. This merging approach reduces system complexity while maintaining reliable failure detection through collective assessment of multiple carriers.
Solution Approach 2:
The detection mechanism is designed to handle multiple component carriers simultaneously with a single detection framework. The network device uses a universal detection process that can assess beam failure status across any number of carriers, making the system adaptable and reducing per-carrier overhead while preserving detection capability.
2Device complexity
If joint beam failure detection is performed across all component carriers, then system complexity is reduced, but detection latency increases
Solution Approach 1:
The patent segments the component carriers into groups for joint detection. Rather than processing all carriers uniformly, the network device organizes carriers into manageable groups and performs detection on these segments. This segmentation enables more efficient processing that reduces overall detection latency while maintaining the benefits of joint detection across the system.
3Loss of energy
If beam failure recovery is triggered for individual component carriers, then resource overhead is reduced, but communication reliability deteriorates
Solution Approach 1:
The patent merges recovery triggering decisions across multiple component carriers. Instead of independently triggering recovery for each carrier that experiences failure, the network device evaluates the collective status of multiple carriers and triggers a unified recovery process. This approach reduces signaling overhead and resource consumption while maintaining communication reliability through coordinated recovery actions that consider the overall system state.
4Speed
If frequent beam failure detection is performed, then detection speed is improved, but resource consumption increases
Solution Approach 1:
The patent implements continuous monitoring of reference signals across multiple component carriers in a coordinated manner. The network device continuously assesses beam quality by evaluating reference signals from multiple carriers simultaneously, enabling rapid detection of beam failures while optimizing resource usage through the efficiency gains from joint processing. This continuous yet optimized approach maintains high detection speed while controlling energy consumption.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for beam failure detection and recovery. A method that may be performed by a user equipment (UE) includes monitoring one or more reference signals for beam failure detection for a plurality of component carriers (CCs), detecting a beam failure for a subset of one or more CCs of the plurality of CCs based on the one or more reference signals, generating a beam failure recovery request (BFRQ) indicating that a beam failure has occurred for the plurality of CCs in response to the detection of the beam failure for the subset of one or more CCs, and transmitting the BFRQ.