IAB-Node Migration Using Partial Handover History
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Solution Overview
Problem
The challenge of efficiently managing IAB-node migration in wireless communication networks, particularly in scenarios involving mobile IAB-nodes, is not adequately addressed by existing technologies, leading to inefficiencies in maintaining network connectivity and data transmission as the IAB-nodes move and change locations.
Innovation Solution
A method and apparatus for IAB-node migration that involves determining and utilizing migration information to facilitate seamless transitions between IAB-donors, including obtaining and exchanging migration information among IAB-donors and IAB-nodes to ensure reliable partial and full migrations, thereby maintaining network connectivity and data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If IAB-node migration is performed without tracking previous migration status, then the migration process is simpler, but network connectivity and data transmission reliability deteriorate during mobile scenarios
Solution Approach 1:
The patent applies preliminary action by determining whether the IAB-node has performed previous migrations before executing the current migration process. The source IAB-donor queries migration history information and obtains first migration information (including indicators of partial vs. full migration) before proceeding with handover configuration. This allows the system to prepare appropriate migration strategies in advance, ensuring network connectivity reliability while managing complexity through structured pre-assessment.
2Loss of information
If partial migration information is not tracked and exchanged between IAB-donors, then information exchange overhead is reduced, but the ability to perform multiple continuous migrations deteriorates
Solution Approach 1:
The patent applies segmentation by dividing migration information into distinct types: first migration information (indicating whether previous migrations were partial or full) and second migration information (exchanged between source and target IAB-donors). This segmented approach allows the system to track essential migration history without exchanging excessive data, enabling multiple continuous migrations while controlling information exchange overhead through selective information sharing.
3Speed
If migration history is not determined before handover, then the migration execution is faster, but the accuracy of migration type identification deteriorates
Solution Approach 1:
The patent applies preliminary action by determining migration history and identifying migration types (partial vs. full migration) before executing the handover process. The source IAB-donor queries whether the IAB-node has performed previous migrations and obtains first migration information prior to configuring handover parameters. This pre-identification ensures accurate migration type classification, which then enables optimized handover execution with appropriate parameters for each migration scenario.
Data Source
AI summary
A migration method, performed by an integrated access and backhaul (IAB)-donor, includes: before performing an IAB-node migration, determining information of a migration that has been performed by an IAB-node; in response to that the IAB-node has performed at least one partial migration, obtaining first migration information associated with the IAB-node; and performing the IAB-node migration according to the first migration information.