Mobile IAB Node Power States for Overlap Interference Control
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Solution Overview
Problem
Interference and power inefficiency in mobile integrated access and backhaul (IAB) networks due to overlapping coverage areas of mobile IAB nodes, leading to redundant communication and increased power consumption.
Innovation Solution
Mobile IAB nodes dynamically adjust their power states based on proximity to other access nodes, turning off when within a defined proximity and turning on when isolated, using signal strength or distance thresholds, with configuration parameters set by a central unit (CU) to manage handovers and reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If mobile IAB nodes operate continuously to provide coverage, then network coverage is maintained, but power consumption increases and interference occurs when nodes are in close proximity
Solution Approach 1:
The patent implements dynamic power state transitions for IAB nodes based on real-time proximity detection. Nodes switch between active and inactive states according to their spatial relationship with neighboring nodes, enabling adaptive power management that responds to changing network conditions rather than operating in fixed states
Solution Approach 2:
The system employs feedback mechanisms where IAB nodes continuously monitor proximity to neighboring nodes and adjust their power states accordingly. This closed-loop control ensures that nodes only activate when necessary for coverage, preventing both unnecessary power consumption and interference from redundant transmissions
2Area of stationary object
If multiple IAB nodes operate simultaneously in close proximity, then coverage area is expanded, but interference between nodes increases
Solution Approach 1:
The patent extracts the problematic simultaneous operation of closely spaced nodes by implementing selective activation. When proximity detection indicates that nodes are too close, the system deactivates redundant nodes, removing the source of interference while maintaining necessary coverage through the remaining active nodes
Solution Approach 2:
The system applies different operational states to different nodes based on their local spatial context. Each node's power state is determined by its specific proximity relationship with neighboring nodes, allowing the network to optimize coverage and minimize interference through localized decision-making at each node
3Object-generated harmful factors
If IAB nodes continuously monitor for neighboring nodes to optimize power states, then interference is reduced, but signaling overhead and processing complexity increase
Solution Approach 1:
IAB nodes autonomously perform proximity detection and power state determination without requiring complex centralized control for each decision. The nodes self-manage their operational states based on local measurements and pre-configured parameters, reducing the signaling overhead and processing complexity that would result from continuous centralized coordination
Data Source
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AI summary
Methods, systems, and devices for wireless communications are described to enable a mobile access node to enter a new power state based on detection of a second access node. The second access node may be detected by the mobile access node or a central unit (CU). The mobile access node or the CU may determine for the mobile access node to enter a new power state and may notify the other of the determination. The mobile access node may enter a lower power state if the second access node is within a defined proximity or if one or more thresholds are exceeded. The mobile access node may enter a higher power state if no other access nodes are within the defined proximity or if the one or more thresholds are not exceeded. Configuration parameters for a power state change procedure may be configured by control signaling from a CU.