IAB Node Radio Control for Overlapping-Band Interference
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Solution Overview
Problem
Existing IAB communication systems face challenges in managing interference between IAB nodes operating with overlapping frequency bands, which affects access performance and spectrum utilization efficiency.
Innovation Solution
An electronic device and method for IAB communication systems that obtain and adjust basic information such as location and radio RX/TX status of IAB nodes, including antenna array configuration, beam direction, and transmit power, to control interference by instructing path adjustments or power reductions, using a spectrum management device to plan motion paths and adjust radio configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If IAB nodes are densely deployed to expand coverage, then coverage performance is improved, but interference between nodes with overlapping frequency bands increases
Solution Approach 1:
The system performs preliminary actions by calculating power-limited areas before interference occurs and proactively controlling IAB nodes to avoid these areas. The controller determines power-limited areas based on received power and interference thresholds, then instructs nodes to adjust their positions or transmission parameters in advance to prevent harmful interference while maintaining dense deployment for expanded coverage.
Solution Approach 2:
The system changes transmission parameters dynamically by adjusting transmission power levels based on the calculated power-limited areas. When an IAB node detects it is approaching a power-limited area, the controller instructs it to reduce transmission power or modify its operation parameters, thereby maintaining coverage expansion while controlling interference through parameter adjustment.
2Adaptability or versatility
If frequency bands of IAB donor and nodes overlap to enable flexible deployment, then deployment flexibility is improved, but interference suppression becomes more difficult
Solution Approach 1:
The system introduces a mediator approach by calculating power-limited areas as an intermediate control mechanism between the IAB donor and nodes. This power-limited area serves as a virtual boundary that mediates the frequency overlap issue, allowing flexible deployment while providing a clear framework for interference management through coordinated control of node positions and transmission parameters.
3Reliability
If IAB nodes operate with high transmit power to ensure access performance, then access reliability is improved, but interference to other nodes increases
Solution Approach 1:
The system applies local quality by determining power-limited areas specific to each IAB node's location and reception conditions. Instead of uniform power control, the system calculates individual power-limited areas based on each node's received power and interference threshold, then applies appropriate power restrictions locally to each node, ensuring access reliability while minimizing harmful interference to surrounding nodes.
Data Source
AI summary
The present disclosure relates to electronic devices, methods and storage medium for a wireless communication system. Various embodiments regarding interference suppression and access control are described. In an embodiment, an electronic device for an integrated access and backhaul (TAB) communication system includes a processing circuit configured to obtain basic information of a first IAB node and a second IAB node, the basic information includes a location and radio receive (RX)/transmit (TX) status of a corresponding IAB node, and the radio RX/TX status includes one or more of antenna array configuration, beam configuration, transmit power, and current reception performance of the corresponding IAB node. The processing circuit is further configured to send control information to the second IAB node.