IAB Node DU Coordination for Dual-Parent Operation Conflicts
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Solution Overview
Problem
In wireless communication systems, IAB nodes connected to two parent nodes via dual connectivity face challenges when simultaneous operations are scheduled that they cannot support, leading to operational conflicts.
Innovation Solution
An operating method for IAB nodes, including an IAB-distributed unit (DU) and mobile terminal (MT), ensures that only one parent node operates when simultaneous operations are not supported, preventing conflicts and ensuring proper resource management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an IAB node is connected to two parent nodes via dual connectivity to improve communication reliability and capacity, then the communication system's robustness and bandwidth are improved, but operational conflicts occur when simultaneous operations are scheduled that the IAB node cannot support
Solution Approach 1:
The patent applies preliminary anti-action by having the IAB node proactively determine whether simultaneous operations are supported before conflicts occur. The node checks its capability to handle simultaneous operations from multiple parent nodes and prevents scheduling conflicts by identifying incompatible operation combinations in advance, thereby resolving the contradiction between dual connectivity reliability and operational simplicity
2Productivity
If dual connectivity is implemented to increase communication capacity and bandwidth, then the data transmission capability is improved, but resource management complexity increases when coordinating operations with multiple parent nodes
Solution Approach 1:
The patent applies self-service by enabling the IAB node to autonomously determine and manage its own operational capabilities. The node independently checks whether it supports simultaneous operations, identifies conflicts, and manages its own resource allocation without requiring complex external coordination mechanisms, thus achieving high capacity with reduced management complexity
Data Source
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AI summary
Provided are an operation method performed by a first distributed unit (DU) of a first parent node communicating with a mobile terminal (MT) of an IAB node in a wireless communication system, and a device using the method. The first parent node acquires first configuration information about the first DU, acquires second configuration information about a second DU of a second parent node communicating with the MT, and restricts, on the basis of the first configuration information and the second configuration information, downlink transmission or uplink reception operations of the first DU if predetermined conditions are satisfied.