5G Receiving Device Beam Link Failure Detection
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Solution Overview
Problem
In the context of 5G New Radio (NR) wireless communication systems, existing technologies face challenges in reliably detecting beam link failures due to varying radio environments and bandwidths, which can lead to unreliable decoding of control channels and inefficient beam monitoring processes.
Innovation Solution
A receiving device configured to monitor reference signals associated with control channels, determine channel quality measures, and declare beam link failures based on these measures and the configuration of the control channel, using methods such as quasi-co-located reference signals, channel quality thresholds, and hypothetical error rates to ensure accurate and reliable beam link failure detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE monitors reference signals over the entire bandwidth to accurately detect beam link failures, then the reliability of beam link failure detection is improved, but the power consumption increases
Solution Approach 1:
The patent divides the entire bandwidth into multiple sub-bands and configures separate monitoring bandwidth parts (BWPs) for control channels in different sub-bands. The UE monitors reference signals only in the configured monitoring BWP rather than the entire bandwidth, thereby reducing power consumption while maintaining detection reliability through selective monitoring of critical frequency regions.
Solution Approach 2:
The patent applies different monitoring configurations to different frequency regions by configuring specific BWPs for control channel monitoring. Each BWP is optimized for its local frequency characteristics, allowing the UE to focus monitoring resources on specific sub-bands where control channels are transmitted, thus balancing reliability and power consumption.
2Measurement precision
If the UE monitors multiple beam pair links across the entire bandwidth, then the accuracy of beam link quality assessment is improved, but the complexity of the monitoring process increases
Solution Approach 1:
The patent segments the monitoring task by configuring separate BWPs for different control channels and beam pair links. Instead of monitoring all beams across the entire bandwidth simultaneously, the UE monitors reference signals in segmented frequency regions, reducing the complexity of tracking multiple beams while maintaining measurement accuracy through focused monitoring in each BWP.
Solution Approach 2:
The patent introduces a frequency dimension for organizing beam monitoring by associating different beam pair links with specific BWPs in the frequency domain. This dimensional organization allows the UE to manage multiple beam monitors systematically, reducing complexity through structured frequency-based separation of monitoring tasks.
3Reliability
If the control channel bandwidth is increased to improve decoding reliability, then the control channel decoding accuracy is improved, but the power consumption for monitoring increases
Solution Approach 1:
The patent enables dynamic switching between different monitoring BWPs configured for control channels. The UE can adaptively select which BWP to monitor based on scheduling information and traffic conditions, allowing flexible adjustment of monitoring bandwidth to balance decoding reliability requirements with power consumption constraints in different operational scenarios.
Solution Approach 2:
The patent changes the monitoring bandwidth parameter by configuring multiple BWPs with different bandwidth sizes for different control channels. The gNB configures the UE with appropriate BWP parameters based on control channel requirements, allowing the system to optimize the trade-off between decoding accuracy and power consumption by selecting appropriate bandwidth parameters for different scenarios.
Data Source
AI summary
A receiving device for a wireless communication system, is configured to: monitor a reference signal associated with a control channel, the control channel being associated with a serving beam link; determine a channel quality measure based on the reference signal; and declare a beam link failure for the serving beam link based on the channel quality measure and a configuration of the control channel.