IAB Node Switching via Pre-configured Parent Nodes
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Solution Overview
Problem
There is no solution for integrated access and backhaul (IAB) node switching in fifth generation mobile communications systems, which is essential for maintaining communication quality when channel conditions deteriorate.
Innovation Solution
An IAB node switching method where a third IAB node receives a node switching command from a source donor node, indicating a parent node switch to a second node, and then switches to the second node, sending indication information to its child node to interrupt transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If IAB node switching is implemented to maintain communication quality when channel conditions deteriorate, then communication reliability is improved, but system complexity increases due to the need for node switching mechanisms
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple parent nodes (donor nodes or IAB nodes) for each IAB node before switching is needed. When channel conditions deteriorate, the IAB node can immediately switch to a pre-configured parent node without complex real-time decision-making, thus improving reliability while controlling system complexity
Solution Approach 2:
The patent implements feedback mechanisms where IAB nodes monitor channel conditions and provide measurements to donor nodes. Based on this feedback, donor nodes can trigger parent node switching when quality thresholds are violated, enabling automated quality maintenance without manual intervention while keeping the switching logic distributed and manageable
2Stability of the object's composition
If parent node switching is triggered when original link fails due to network congestion or channel deterioration, then communication stability is improved, but switching delay increases
Solution Approach 1:
Multiple parent nodes are pre-configured and pre-established for each IAB node before switching is needed. When link failure occurs, the IAB node can immediately activate a pre-configured parent node, eliminating the time required for selecting and establishing new connections, thus reducing switching delay while maintaining stability
Solution Approach 2:
The system prepares backup parent node connections in advance as a cushion against potential link failures. These pre-established alternative paths ensure that when congestion or deterioration occurs, switching can happen rapidly without service interruption, cushioning the impact of failures
3Adaptability or versatility
If IAB node switching mechanism is introduced to solve relay switching problems in 5G systems, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent creates a universal parent node switching mechanism that can be applied to all IAB nodes regardless of their specific deployment scenario. The same switching framework works for both donor node switching and IAB node switching, providing adaptability across different 5G network configurations while avoiding the need for scenario-specific complex solutions
Solution Approach 2:
Instead of having donor nodes directly control all IAB node switching decisions (which would create centralized complexity), the patent inverts the control approach by enabling IAB nodes to autonomously execute switching based on pre-configured policies and local measurements. This distributes complexity to the edge while maintaining overall system adaptability
Data Source
AI summary
An integrated access and backhaul (IAB) node switching method, including: receiving, by a third IAB node, a node switching command from a source donor node, where the node switching command is used to indicate a parent node of the third IAB node to switch to a second node, the source donor node is a control node of the third IAB node, the first node is a source parent node of the third IAB node, the first node is a donor node or another IAB node, and the second node is a donor node or another IAB node; and switching, by the third IAB node, to the second node, and sending, by the third IAB node, first indication information to a child node of the third IAB node, where the first indication information indicates the child node to interrupt transmission with the third IAB node.