DRX ON Extension for Beam Failure Detection in 5G NR
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Solution Overview
Problem
Existing wireless communication systems, particularly 5G NR, face challenges in beam failure detection (BFD) and discontinuous reception (DRX) that affect quality of service (QoS), latency, and reliability, as they do not effectively predict beam failures or efficiently manage DRX durations.
Innovation Solution
A method and apparatus at the user equipment (UE) are configured to predict beam failures during DRX OFF durations, extending the DRX ON duration and performing BFD-related procedures, while the network entity receives and responds with beam switching commands, enhancing BFD/beam failure recovery (BFR) accuracy and timeliness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the DRX OFF duration is used for power saving, then energy consumption is reduced, but beam failure detection capability deteriorates
Solution Approach 1:
The system performs preliminary beam failure detection during the DRX ON duration before entering the OFF duration. The network entity configures BFD reference signals and detection parameters in advance, allowing the UE to identify potential beam failures before power-saving mode begins, thus maintaining detection capability while preserving energy benefits
Solution Approach 2:
The patent extends beam failure detection procedures into the DRX OFF duration by configuring periodic BFD reference signals that continue to be monitored even when the UE is in power-saving mode. This continuous monitoring ensures uninterrupted beam failure detection capability while the UE maintains its energy-efficient DRX operation
2Measurement precision
If the DRX ON duration is extended to perform BFD procedures, then beam failure detection accuracy is improved, but energy consumption increases
Solution Approach 1:
The system applies beam failure detection resources selectively only during specific DRX ON durations when needed, rather than continuously. The network configures BFD reference signals and detection parameters that are activated locally during ON periods, allowing accurate detection when the UE is awake while minimizing energy consumption by not extending ON durations unnecessarily
Solution Approach 2:
Beam failure detection is performed periodically during DRX ON durations using configured BFD reference signals. The periodic nature of DRX cycles provides natural intervals for BFD operations, allowing the system to achieve adequate detection accuracy through periodic measurements rather than continuous monitoring, thus balancing accuracy with energy efficiency
3Loss of time
If beam failure detection is performed during DRX OFF duration, then detection timeliness is improved, but device complexity increases
Solution Approach 1:
The UE autonomously performs beam failure detection during DRX OFF duration using pre-configured BFD reference signals and parameters provided by the network. The device self-manages the detection process without requiring continuous network intervention or complex coordination mechanisms, achieving timely detection while keeping implementation complexity manageable through autonomous operation
Data Source
AI summary
Methods, apparatuses, and computer-readable storage medium for extending DRX ON duration are provided. An example method includes identifying a predicted BFD within a DRX OFF duration associated with a configured DRX. The example method may further include extend, based on the predicted BFD, a DRX ON duration associated with the configured DRX. The example method may further include continuing to perform one or more BFD related procedures during the DRX ON duration.