IAB Node Migration Using Advance Configuration Handover
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Solution Overview
Problem
Existing mobile communication technologies face challenges in managing efficient handovers and migrations of integrated access and backhaul (IAB) nodes, particularly in scenarios involving high-speed movements, leading to increased signaling overhead and disrupted service continuity.
Innovation Solution
Implementing systems and methods for gradual and full migration of IAB nodes, including configuration information exchange via XnAP and F1AP messages, to manage handovers and migrations, ensuring seamless transitions and reduced interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional handover methods are used for IAB nodes in high-speed movement scenarios, then service continuity may be maintained, but signaling overhead increases and handover efficiency decreases
Solution Approach 1:
The patent implements preliminary action by performing configuration information exchange between source and target IAB donors before the actual handover occurs. The target donor receives and processes configuration information (radio resource configuration, cell-specific channel configuration) in advance, preparing the network path and parameters needed for seamless handover. This pre-preparation reduces handover execution time and signaling overhead during the critical handover moment while ensuring service continuity.
2Reliability
If configuration information is exchanged between IAB donors during handover, then service continuity is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts and separates the configuration information exchange process from the main handover execution flow. By extracting configuration information (radio resource configuration, cell-specific channel configuration) as a preliminary preparation step that occurs independently before handover, the system reduces the signaling burden during the critical handover moment. This separation allows configuration transfer to happen in advance when network conditions are more stable, reducing overall signaling overhead while maintaining service continuity.
3Adaptability or versatility
If IAB nodes perform migration in high-speed environments, then network adaptability is improved, but handover reliability decreases due to increased mobility challenges
Solution Approach 1:
The patent addresses high-speed mobility challenges by implementing preliminary action through advance configuration information exchange between IAB donors. By preparing the target donor with all necessary configuration parameters before the IAB node actually hands over, the system compensates for the reduced reaction time caused by high-speed movement. This pre-preparation ensures that when handover is triggered in high-speed scenarios, the target donor is already ready to immediately establish service, maintaining handover reliability despite mobility challenges.
Data Source
AI summary
Methods, apparatus, and systems for improving migrations in wireless systems during handover of integrated access and backhaul (IAB) nodes between central units (CU), where one or more user equipment or mobile terminals are connected to an IAB node. The disclosure relates to communicating configuration information for a gradual handover to prevent interference and packet loss.