Terminal Device Beam Pair Link Switching Mechanism
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Solution Overview
Problem
In communications networks, especially for high-frequency bands, beam pair links may degrade over time, leading to suboptimal performance, and existing methods for beam recovery are either too costly or time-consuming, particularly when the quality deterioration does not meet the trigger condition for beam link failure.
Innovation Solution
A terminal device is configured to estimate the performance of alternative beam pair links and report a false beam link failure to the network node, allowing a switch to the alternative link without meeting the traditional trigger condition for failure, thereby improving communication quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the terminal device waits for the trigger condition to be met before reporting beam link failure, then the signaling overhead is reduced, but the communication performance deteriorates when beam quality degrades but does not meet the failure threshold
Solution Approach 1:
The terminal device performs partial beam failure reporting by reporting only when alternative beams are available and provide better performance, rather than waiting for complete failure conditions. This allows proactive beam switching before the trigger condition is met, improving performance without excessive signaling.
Solution Approach 2:
The terminal device continuously monitors beam quality and provides feedback to the network node about alternative beam performance. This feedback mechanism enables the network to switch beams proactively based on performance degradation trends rather than waiting for failure conditions.
2Reliability
If the terminal device proactively reports beam link failure when alternative beams are better, then the communication performance is improved, but the signaling overhead increases
Solution Approach 1:
The terminal device applies partial action by reporting beam failure only in specific conditions: when alternative beams are measured to provide better performance and when such reporting would result in net performance improvement. This selective reporting reduces unnecessary signaling overhead while maintaining performance benefits.
Data Source
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AI summary
There is provided mechanisms for causing a switch to an alternative beam pair link. A terminal device is configured with a trigger condition for beam link failure. A method is performed by the terminal device. The method comprises estimating, during communication with a network node over a current beam pair link, that performance of the communication would behandling of beam pair links better if using the alternative beam pair link instead of the current beam pair link for the communication. The method comprises reporting beam link failure of the current beam pair link to the network node, without the trigger condition for beam link failure of the current beam pair link being met, thereby causing the switch to the alternative beam pair link.