Mobile IAB Inter-Donor Migration for Seamless 5G Handover
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Solution Overview
Problem
Existing wireless communication technologies lack a comprehensive solution for inter-donor migration in mobile IAB scenarios, particularly for IAB nodes mounted on vehicles providing 5G coverage, which necessitate efficient handover and migration management across different IAB donors.
Innovation Solution
A method for inter-donor migration in mobile IAB scenarios involving the exchange of identifiers, configuration of conditional handovers, and management of F1 traffic paths, including the use of Xn application protocol identifiers and quality-of-service information to facilitate seamless handovers and migrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If inter-donor migration is implemented for mobile IAB nodes, then coverage and capacity enhancement is improved, but migration management complexity increases
Solution Approach 1:
The migration management process is segmented into distinct phases: preparation phase (where source and target donors prepare resources), execution phase (actual handover), and confirmation phase (verification). This segmentation reduces overall complexity by breaking down the complex migration task into manageable steps with specific responsibilities for different network entities.
Solution Approach 2:
The patent implements preliminary actions by having the source IAB donor and target IAB donor perform preparation activities before the actual migration occurs. This includes resource allocation, path setup, and configuration preparation, which ensures that when migration is needed, the infrastructure is already in place to support the transition smoothly.
2Reliability
If seamless handover is achieved through identifier exchange, then service continuity is improved, but protocol complexity increases
Solution Approach 1:
The patent introduces intermediary elements including the F1 terminating donor as a mediator that facilitates communication between source and target IAB donors. This intermediary manages the identifier exchange process and coordinates the handover, simplifying the overall protocol by centralizing the coordination function and reducing the complexity of direct interactions between multiple entities.
3Productivity
If F1 traffic path management is implemented, then migration efficiency is improved, but control complexity increases
Solution Approach 1:
The patent implements feedback mechanisms where the F1 terminating donor receives status information about the migration process and provides feedback to both source and target IAB donors. This feedback loop enables real-time monitoring and adjustment of the traffic path management, improving efficiency by allowing dynamic optimization based on actual migration progress and network conditions.
Data Source
AI summary
A wireless communication method for use in a target Integrated Access and Backhaul (IAB) donor is disclosed. The method comprises: receiving, from an F1 terminating donor of an IAB node, a IAB transport migration management request message, wherein the IAB transport migration management request message comprises at least one of a first identifier allocated by the F1 terminating donor or a second identifier allocated by the target IAB donor of a mobile termination of the IAB node.