Preemptive Doppler Measurement Reports for NTN Interference
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Solution Overview
Problem
In non-terrestrial networks (NTN), high relative speeds and varying Doppler shifts cause significant interference challenges due to dynamic frequency and timing misalignments between different network layers, such as LEO and HAPS, leading to inefficient interference management and resource utilization.
Innovation Solution
User Equipment (UE) detects potential interference and sends alert reports to the serving node, providing time-stamped assistance information on Doppler shift and timing advance to enable proactive interference mitigation strategies, including power control and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If preemptive measurement reports on Doppler offsets are implemented, then interference mitigation capability is improved, but device complexity and signaling overhead increase
Solution Approach 1:
The patent implements preemptive measurement reports where the UE performs Doppler offset measurements and sends alert reports to the network node before actual interference occurs. This preliminary action allows the network to proactively adjust resource allocation and power control parameters, preventing interference issues rather than reacting to them after they occur, thus improving reliability while managing complexity through structured reporting triggers.
Solution Approach 2:
The patent establishes a feedback mechanism where the UE continuously monitors Doppler offsets and provides measurement reports to the network node. This feedback loop enables the network to dynamically adjust resource allocation and power control based on real-time channel conditions, improving interference mitigation capability while the structured feedback format helps manage signaling overhead.
2Measurement precision
If continuous monitoring of Doppler shifts is performed, then interference detection accuracy is improved, but energy consumption increases
Solution Approach 1:
The patent implements periodic measurement and reporting based on configured triggers rather than continuous monitoring. The UE performs Doppler offset measurements at intervals determined by network configuration or predefined triggers, achieving sufficient interference detection accuracy while significantly reducing energy consumption compared to continuous monitoring. This periodic approach balances measurement precision with power efficiency.
Solution Approach 2:
The patent allows the network to configure measurement parameters such as reporting intervals, threshold levels, and trigger conditions. By dynamically adjusting these parameters based on channel conditions and service requirements, the system optimizes the balance between detection accuracy and energy consumption, performing more frequent measurements when interference risk is high and reducing measurements when conditions are stable.
3Productivity
If preemptive alert reports are transmitted, then resource allocation efficiency is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts only the essential information needed for interference mitigation from the full channel state, specifically focusing on Doppler offset measurements and alert report triggers. By sending only the critical parameters (Doppler offset values, measurement results, and interference alerts) rather than complete channel state information, the system improves resource allocation efficiency while minimizing signaling overhead through selective information extraction.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Preemptive interference management reduces interference risks by optimizing UE operations, ensuring efficient use of resources and minimizing disruptions across different NTN and TN networks.
Implementation Method 1
high relative speeds and varying Doppler shifts cause significant interference challenges due to dynamic frequency and timing misalignments
Data Source
AI summary
Systems, methods, apparatuses, and computer program products for preemptive measurement reports are provided. One method may include detecting, by a user equipment, a potential for creating interference to at least one network node. Based on the detection of the potential for creating the interference, the method may include transmitting an alert report, to a serving node of the user equipment, to indicate the potential for creating the interference to the at least one network node.