Predictive Handover Control for Air-Ground Communication Stability
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Solution Overview
Problem
In high-speed air-ground communication systems, such as those on aircraft and high-altitude platforms, periodic path combination and destruction effects lead to signal degradation and frequent handovers, causing communication quality issues and increased power consumption due to repeated connection and disconnection events.
Innovation Solution
A method that predicts signal strength using a phase difference model to determine when to initiate or avoid handovers, reducing unnecessary cell changes and power consumption by estimating signal power at future times to prevent untimely cell changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If handover is triggered based on current signal power measurements, then communication quality is maintained, but unnecessary handovers occur during periodic signal degradation, increasing power consumption and connection instability
Solution Approach 1:
The system performs preliminary prediction of future signal power using a dual-path channel model before triggering handover. By estimating the signal evolution over a prediction horizon and considering the duration of path destruction effects, the system可以避免 unnecessary handovers during temporary signal degradation, thus reducing power consumption and connection instability
Solution Approach 2:
The system uses feedback from historical signal measurements to continuously update the channel model parameters and improve prediction accuracy. The prediction mechanism provides feedback on whether handover should be triggered or delayed, creating a closed-loop control system that optimizes handover decisions
2Reliability
If handover is triggered based on current signal power measurements, then communication quality is maintained, but periodic handovers occur due to path combination and destruction effects, degrading communication quality
Solution Approach 1:
The system predicts future signal power and identifies periods of path destruction before they occur. By anticipating the duration and impact of signal degradation, the system can delay handover decisions until the degradation period has passed, preventing unnecessary handovers that would degrade communication quality
Solution Approach 2:
The system applies preliminary anti-action by predicting and compensating for the periodic path combination and destruction effects. The channel model anticipates signal degradation patterns and adjusts handover triggering accordingly, counteracting the harmful effects of periodic signal variations
3Reliability
If initial access procedure is repeated after connection loss, then communication is restored, but additional delay of hundreds of milliseconds occurs at high speeds
Solution Approach 1:
The system performs preliminary prediction to identify impending connection loss due to path destruction. By predicting the signal degradation before it occurs, the system can initiate preventive measures such as adjusting transmission parameters or preparing alternative paths, avoiding complete connection loss and the need for full reinitialization
Solution Approach 2:
The system applies beforehand cushioning by maintaining synchronization information and preparing for potential connection degradation in advance. The prediction mechanism allows the system to cushion against the impact of path destruction effects, reducing the severity of connection loss and minimizing reconnection delays
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
This approach stabilizes communication quality by minimizing unnecessary handovers and reducing energy consumption by avoiding premature cell changes, thus enhancing communication reliability and efficiency in dynamic air-ground environments.
Implementation Method 1
the predicted power value is determined according to at least the phase difference between a reflected signal path and a direct signal path
Implementation Method 2
the predicted power value is determined according to at least the phase difference between a reflected signal path and a direct signal path
Data Source
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AI summary
The invention relates to a method for managing the cell change of a mobile user within a communication system in which a prediction loop is used - when the mobile user's exit condition is not met (26b), the mobile user determines (31) the signal power value estimated from a value predicted at the future time t+Δt, the mobile user compares the predicted power value of the signal emitted by the serving base station and the predicted power value of the signal emitted by a neighboring base station, - the mobile user checks if the exit condition is met, and if it is met (32a), the mobile user remains connected to the serving base station, - if the exit condition is not met, (32b),The mobile user compares the measurement time tmes of the power to a threshold value tseuil and - returns (27a) to the power measurement of the signals (25) if the measurement time is less than the threshold value - transmits the measured power value for the signal emitted by the serving base station and/or by the neighboring base station, (28), so that the serving base station triggers a cell change, (29).