Backhaul Status Reporting for IAB Network Stability
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Solution Overview
Problem
In wireless communication systems, particularly in IAB networks, there is a need for efficient backhaul status reporting and failure notification mechanisms to manage backhaul link failures across multiple cell groups, as current methods often result in unnecessary notifications and instability due to lack of fine control over when and why such notifications are sent.
Innovation Solution
A method and apparatus for a network node to monitor backhaul links for multiple cell groups, receive information on which cell groups require status reporting, and transmit specific backhaul status messages based on this information, allowing for controlled failure notification based on cell group status, cause of failure, and recovery capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If backhaul status reporting is implemented for all cell groups, then complete backhaul status information is obtained, but network stability deteriorates due to unnecessary notifications and frequent topology changes
Solution Approach 1:
The patent applies local quality by differentiating the reporting behavior for different cell groups. Instead of uniform reporting for all cell groups, the system selectively reports backhaul status only for specific cell groups that meet certain criteria (e.g., failed cell groups, cell groups with specific causes). This selective approach ensures complete information is obtained where needed while avoiding unnecessary notifications in other cell groups, thus resolving the contradiction between information completeness and network stability.
2Stability of the object's composition
If fine control on backhaul link status notification is implemented, then network stability is improved, but device complexity increases due to additional monitoring and control mechanisms
Solution Approach 1:
The patent segments the backhaul status reporting function into distinct components: monitoring backhaul links, determining failure causes, identifying recoverable failures, and selectively reporting based on cell group status. This segmentation allows the system to implement fine control through modular, manageable functions rather than a monolithic complex control mechanism, reducing overall system complexity while achieving the desired stability.
Solution Approach 2:
The patent implements preliminary action by pre-determining which cell groups require reporting based on their status and failure characteristics before actual reporting occurs. The system proactively identifies failed cell groups and recoverable failures, and prepares reporting strategies in advance, which simplifies the control mechanism by avoiding complex real-time decision-making during status notifications.
3Stability of the object's composition
If unnecessary backhaul link status notifications are avoided, then network stability is improved, but information completeness is reduced
Solution Approach 1:
The patent employs feedback mechanisms where the system continuously monitors backhaul link status, receives feedback on cell group failures and recoveries, and adjusts reporting behavior accordingly. This feedback loop ensures that information is reported when truly necessary (improving stability) while maintaining completeness of critical backhaul status information through selective reporting based on actual network conditions.
Data Source
AI summary
The present disclosure relates to backhaul status reporting in wireless communications. According to an embodiment of the present disclosure, a method performed by a network node in a wireless communication system comprises: monitoring backhaul links for multiple cell groups; receiving information indicating at least one cell group of which a backhaul status is to be reported among the multiple cell groups; and transmitting a message for reporting the backhaul status of the at least one cell group based on the information.