Beam Pair Link RLF Detection in Wireless Networks
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Solution Overview
Problem
In wireless networks, determining radio link failure (RLF) can lead to delayed communication and poor service quality, causing call drops due to the existing methods' reliance on timers that do not account for beam failure recovery efficiently, resulting in service disruptions.
Innovation Solution
An electronic device implements a method to determine RLF by monitoring signal quality and initiating beam failure recovery using candidate beams, allowing for timely RRC re-establishment or cell search procedures to maintain service continuity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the existing RLF determination method using timers is used, then the device can maintain simple operation, but service continuity is disrupted due to delayed detection and call drops occur
Solution Approach 1:
The patent applies preliminary action by performing beam failure recovery procedures before the T310 timer expires. The device identifies candidate beams and initiates recovery actions during the timer period, rather than waiting for timer expiration. This proactive approach maintains service continuity by restoring the radio link before RLF is formally declared, eliminating call drops while keeping the operation framework relatively simple.
2Reliability
If beam failure recovery is implemented, then service continuity is improved, but the device complexity increases due to additional monitoring and recovery procedures
Solution Approach 1:
The patent segments the RLF determination process into distinct phases: normal operation with beam monitoring, beam failure detection, recovery attempt phase, and fallback to timer-based RLF determination. By dividing the complex recovery process into manageable segments with clear entry and exit conditions, the device can implement sophisticated beam failure recovery without overwhelming complexity. Each segment has specific tasks that can be independently managed.
Solution Approach 2:
The patent implements dynamic behavior by making the recovery process adaptive - the device monitors beam quality continuously and dynamically switches between normal operation and recovery modes based on detected conditions. The system adjusts its behavior based on real-time signal quality measurements, initiating recovery only when necessary and returning to normal operation when successful, thereby managing complexity through conditional execution rather than permanent complex structures.
Data Source
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AI summary
An electronic device may establish a beam pair link, using a first Tx beam included in a plurality of Tx beams having different directions transmitted from a base station, and a first Rx beam included in a plurality of Rx beams, may receive information associated with the plurality of Tx beams, using the beam pair link, may receive a plurality of first signal blocks, using the beam pair link, may perform first decoding of the first signal blocks, may determine beam failure for the first Tx beam based at least partly on the result of the first decoding, may identify measurement information about the plurality of Tx beams, and may determine RLF associated with the base station based on the measurement information and information associated with the Tx beams.