Base Station Beam Failure Detection in Wireless Networks
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Solution Overview
Problem
In wireless communication networks, especially in the mmWave band, beam failure events occur frequently due to blockages or movements, leading to communication losses and delays in beam reestablishment, particularly in integrated access and backhaul nodes, where proactive detection methods are lacking to mitigate these issues.
Innovation Solution
A method for a Base Station (BS) to detect beam failure events by transmitting resource and reference signal configurations to User Equipment (UE), determining responses, and initiating beam recovery procedures based on signal quality thresholds and correlations with neighboring UEs, thereby predicting and preventing beam failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If narrow beams are used for transmission, then spectral efficiency is improved, but beam failure risk increases due to blockages or movements
Solution Approach 1:
The base station proactively detects beam failure events by monitoring response signals from UEs before complete communication loss occurs. When a beam failure is detected on a first UE, the system predicts potential failures for second UEs in proximity and preemptively initiates beam recovery procedures, preventing complete communication breakdown and maintaining spectral efficiency.
Solution Approach 2:
The system monitors response signals from UEs to detect beam failure events. This feedback mechanism allows the base station to identify when beams are failing due to blockages or movements and trigger recovery procedures, maintaining reliable communication while using narrow beams for high spectral efficiency.
2Device complexity
If beam failure detection is performed reactively, then device complexity is reduced, but data loss and delay increase during beam reestablishment
Solution Approach 1:
Instead of waiting for complete beam failure, the system proactively detects beam failure events by monitoring for response signals from UEs. When failures are detected on first UEs, the system predicts potential failures for second UEs in proximity and initiates recovery procedures before complete communication loss occurs, reducing data loss and reestablishment delay.
Solution Approach 2:
The system uses response signal monitoring as an intermediary detection mechanism. By watching for the absence of expected response signals from UEs, the base station can detect beam failures early and trigger recovery procedures, avoiding the need for complex continuous beam quality measurement while reducing detection delay.
3Speed
If beam failure detection is performed at UE, then response time is improved, but network coordination complexity increases
Solution Approach 1:
The base station performs beam failure detection by monitoring response signals from UEs, effectively making the network infrastructure perform the detection function. This self-service approach at the base station level maintains fast detection response while avoiding the need for complex coordination between multiple UEs and the base station that would be required if distributed UE-based detection were implemented.
Data Source
AI summary
Accordingly, the embodiment provides a method for detecting a beam failure event by a Base Station (BS) (100) in a wireless network (1000). The method includes transmitting at least one of a resource scheduling configuration and a reference signal configuration to at least one first User Equipment (UE) (300a) in the wireless network (1000). Further, the method includes determining whether at least one response is received from the first UE (300a). Further, the method includes detecting a beam failure event associated with at least one beam from the plurality of beams of the first UE (300a) in response to determining that the at least one response is not received from the first UE (300a).