Boundary IAB Node Capability Signaling for 5G Load Control
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Solution Overview
Problem
As 5G becomes widespread, not all IAB nodes are capable of functioning as boundary IAB nodes due to equipment specification and resource limitations, leading to increased system load and potential wireless link failures.
Innovation Solution
A communication apparatus and method that determines whether an IAB node can operate as a boundary IAB node by transmitting predetermined information through RRC messages, MeasurementReports, or beacon notifications, allowing the IAB donor to selectively implement processes for boundary operation only on capable nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If all IAB nodes are configured to potentially function as boundary IAB nodes, then network adaptability is improved, but system load and processing complexity increase
Solution Approach 1:
The patent applies local quality by enabling only specific IAB nodes that meet certain criteria to function as boundary IAB nodes, rather than all nodes. The determination is made based on local node characteristics such as connection capabilities and network position, allowing the capability to be distributed selectively throughout the network based on individual node properties
Solution Approach 2:
The patent inverts the conventional approach by having the IAB node itself determine its boundary capability rather than the IAB donor centrally assigning it. The node autonomously evaluates whether it can function as a boundary node and reports this determination to the donor, reversing the traditional top-down control model
2Reliability
If boundary IAB node determination is performed centrally by IAB donor, then control reliability is improved, but communication overhead and processing time increase
Solution Approach 1:
The patent applies preliminary action by having the IAB node determine its boundary capability in advance and report this information to the IAB donor before actual boundary operations begin. This pre-determination allows the donor to prepare appropriate control configurations and reduces real-time processing requirements when boundary operations are needed
3Area of stationary object
If IAB nodes with resource limitations are forced to function as boundary nodes, then network coverage is improved, but wireless link failure risk increases
Solution Approach 1:
The patent applies parameter changes by establishing specific determination criteria that evaluate node resources, connection capabilities, and network conditions before allowing boundary node operation. Nodes with insufficient resources fail the determination and cannot function as boundary nodes, automatically adjusting the system parameters to match actual node capabilities
Data Source
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AI summary
Disclosed is a communication apparatus characterized by including determination means for determining whether or not its own node functioning as an IAB (Integrated Access and Backhaul) node which forms one IAB network is capable of operating as a boundary IAB node which serves as an IAB node connecting to both the one IAB network and another IAB network, and transmission means for transmitting, based on a determination result of the determination means, a communication message according to the determination result.