Mobile IAB Aerial Mobility Control for Throughput and NRT Accuracy
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Solution Overview
Problem
Wireless devices receiving services through a mobile IAB-node with UAV capability experience degraded downlink and uplink throughput due to interference from multiple base stations during flight, and lack altitude-based measurements, leading to invalid Neighbor Relationship Tables (NRTs.
Innovation Solution
An Integrated Access and Backhaul (IAB)-donor-Central Unit (CU) initiates integration procedures with the mobile IAB-node, performs setup procedures, and transmits RRC messages to prevent wireless devices from performing measurements during flight, thereby improving throughput and preventing erroneous NRTs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mobile IAB-node performs normal measurement procedures during flight, then the base station can maintain standard neighbor relationship management, but the wireless devices experience degraded throughput due to interference from multiple base stations and the base station may create erroneous NRTs
Solution Approach 1:
The patent applies preliminary anti-action by preemptively stopping measurement procedures and preventing ANR activation when the mobile IAB-node is detected to be in flight. The base station identifies aerial mobility through altitude information or measurement patterns, then proactively disables measurement reporting and ANR before interference issues can degrade throughput or create erroneous NRTs. This preventive approach resolves the contradiction by eliminating the harmful measurement actions before they can cause both throughput degradation and NRT errors.
2Adaptability or versatility
If the wireless device performs cell measurements during flight, then the base station can update neighbor relationships dynamically, but invalid measurements lead to erroneous NRT entries
Solution Approach 1:
The patent applies preliminary action by checking for aerial mobility conditions before allowing measurement procedures to execute. The base station receives altitude information or detects flight patterns in advance, then preemptively configures the wireless device to stop measurements or prevents ANR activation. This ensures that even though the system maintains adaptability for ground-based scenarios, aerial measurements are blocked beforehand, preventing invalid NRT entries while preserving dynamic neighbor relationship updates for legitimate cases.
3Adaptability or versatility
If the mobile IAB-node supports UAV capability with aerial mobility, then the system can provide service to flying devices, but interference from multiple base stations degrades downlink and uplink throughput
Solution Approach 1:
The patent applies segmentation by dividing the measurement control into ground-based and aerial modes. The system segments the neighbor relationship management into two distinct operational paths: normal measurements for ground devices and restricted/no measurements for aerial devices. By receiving altitude information or detecting flight patterns, the base station segments the measurement behavior, allowing aerial mobility support while preventing the throughput degradation that would result from multi-base station interference during flight.
Data Source
AI summary
A method and apparatus for supporting aerial mobility in mobile IAB networks is provided. The LAB-CU receives information on an UAV Capability of the mobile IAB-node. The IAB-CU transmits a UE Context Setup Request message including information on a flying state for a UE. The IAB-CU receives a gNB-DU Configuration Update message including information on whether the mobile IAB-node is in flight. The IAB-CU transmits, to the UE through the mobile IAB-node, (i) an RRC message including a measurement stop indication, and/or (2) an RRC message without information related to measurements.


