IAB Node Reconfiguration Signaling for Child Node Migration
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Solution Overview
Problem
Existing technologies fail to address the timely reconfiguration of child nodes and terminal equipment when an IAB-node migrates to another parent node, leading to communication disruptions.
Innovation Solution
An integrated access and backhaul node (IAB-node) receives a first reconfiguration message and transmits indication information to radio devices, enabling them to apply configuration in a second reconfiguration message for handover or reconfiguration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an IAB-node migrates to another parent node, then the network topology can be optimized and resource allocation improved, but the child nodes and terminal equipment cannot be timely reconfigured leading to communication disruptions
Solution Approach 1:
The patent applies preliminary action by having the target parent node prepare and send a second reconfiguration message to child nodes before the IAB-node actually migrates. This allows child nodes to be pre-configured with the new parent node's parameters, so when migration occurs, they can immediately connect without communication disruptions. The reconfiguration preparation happens in advance during the migration decision process.
Solution Approach 2:
The patent implements feedback through the reconfiguration message exchange process. The source parent node sends a first reconfiguration message to the IAB-node, which then sends indication information to child nodes. The target parent node sends a second reconfiguration message back to child nodes. This multi-directional feedback loop ensures all nodes are properly configured and aware of the migration status, maintaining communication reliability during topology changes.
2Productivity
If the IAB-node migrates without reconfiguring child nodes, then the migration process is simpler and faster, but the child nodes and terminal equipment cannot perform correct reconfiguration leading to communication failures
Solution Approach 1:
The patent performs preliminary reconfiguration actions by sending the second reconfiguration message to child nodes before the actual migration completes. This allows child nodes to prepare their reconfiguration in advance, so when the IAB-node migrates, they are already configured and ready, achieving both speed and correctness.
Solution Approach 2:
The patent segments the reconfiguration process into distinct phases: the source parent node sends a first reconfiguration message to the IAB-node, the IAB-node sends indication information to child nodes, and the target parent node sends a second reconfiguration message to child nodes. This segmentation allows each phase to be optimized independently, ensuring correctness while maintaining efficiency.
3Device complexity
If child nodes wait for post-migration reconfiguration, then the migration execution is simpler, but communication disruptions occur and reconfiguration is not timely
Solution Approach 1:
The patent applies preliminary action by initiating the reconfiguration process before migration completion. The target parent node sends the second reconfiguration message to child nodes in advance, allowing child nodes to prepare and apply configurations before the IAB-node actually connects to the new parent. This eliminates waiting time and communication disruptions.
Solution Approach 2:
The patent ensures continuity of useful action by maintaining the reconfiguration process throughout the migration timeline. Instead of stopping reconfiguration after migration, the system continues to exchange reconfiguration messages and apply changes continuously, ensuring seamless transition and eliminating idle waiting periods.
Data Source
AI summary
An apparatus for receiving and transmitting signals, applicable to an integrated access and backhaul (IAB) node, includes a first receiver configured to receive a first reconfiguration message, and a first transmitter configured to transmit indication information to a radio device, the indication information being used to indicate that the radio device applies configuration in a second reconfiguration message.