Adaptive Beam Switching for Periodic Reference Signal Monitoring
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Solution Overview
Problem
In wireless communication networks, high interference levels and listen-before-talk (LBT) failures can inhibit communications by causing periodic reference signals, such as CSI-RS, to be missed, leading to beam misalignment and failure.
Innovation Solution
Implementing methods and apparatuses that detect consecutive occurrences of interference levels exceeding thresholds or LBT failures, allowing devices to switch to alternative beams or temporarily suspend signal reception/transmission, thereby adapting periodic reference signal transmission to mitigate interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If periodic reference signals are transmitted using a single beam, then transmission simplicity is maintained, but reliability deteriorates due to interference and LBT failures
Solution Approach 1:
The patent segments the reference signal transmission into multiple beams (first beam and second beam) instead of using a single beam. The transmitting device monitors LBT failures and interference levels separately for each beam, and the receiving device monitors reference signals from multiple beams independently. This segmentation allows the system to switch to alternative beams when one beam experiences interference or LBT failures, thereby improving transmission reliability while managing complexity through structured multi-beam operation
Solution Approach 2:
The patent changes the parameter of beam selection dynamically based on monitored conditions. When LBT failures or high interference levels are detected on the first beam, the system switches to using the second beam for reference signal transmission. This parameter change (beam selection) is triggered by detected conditions and resolves the contradiction by adapting the transmission path to maintain reliability without requiring complex permanent multi-beam infrastructure
2Reliability
If the system monitors for interference and LBT failures on multiple beams, then transmission reliability improves, but the complexity of monitoring and beam management increases
Solution Approach 1:
The patent implements preliminary action by pre-configuring multiple beams (first beam and second beam) and establishing monitoring mechanisms before actual transmission issues occur. The transmitting and receiving devices are prepared with multiple beam configurations and monitoring capabilities in advance, so when interference or LBT failures are detected, the system can immediately switch to pre-prepared alternative beams without complex real-time decision-making, thus improving reliability while controlling complexity through advance preparation
3Reliability
If the system switches to alternative beams upon detecting interference or LBT failures, then communication reliability improves, but the time required for beam switching and re-establishment increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple beams and their monitoring parameters before transmission issues occur. The receiving device is already set up to monitor reference signals from both the first and second beams simultaneously or in rapid succession. When LBT failures or interference are detected on the first beam, the system can immediately switch to the pre-configured second beam without requiring time-consuming reconfiguration or search procedures, thus minimizing beam switching time while maintaining improved reliability
Data Source
AI summary
Apparatuses, methods, and systems are disclosed for monitoring periodic reference signals. One method includes detecting, at a device, for reception of a periodic downlink reference signal from at least a first beam, a number of consecutive occurrences of: an interference level being greater than an interference level threshold; a listen-before-talk failure; or a combination thereof. In some embodiments, the method includes determining whether the number of consecutive occurrences is greater than a predetermined threshold. In certain embodiments, the method includes, in response to the number of consecutive occurrences being greater than the predetermined threshold: monitoring to receive the periodic downlink reference signal from a second beam; terminating the monitoring for the reception of the downlink reference signal from at least the first beam for a time period; or a combination thereof.