UAV UE Measurement Reporting for Low-Latency Mobility
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Solution Overview
Problem
Existing measurement reporting procedures for unmanned aerial vehicle (UAV) user equipment (UE) mobility introduce delays and are not suitable for mobility purposes due to frequent triggering of measurement reports, especially in scenarios with high path loss and line of sight path loss, leading to increased signaling overhead and latency.
Innovation Solution
Implementing configurations for UAV UE mobility that include indications for triggering measurement reporting procedures based on mobility purposes, periodic triggering, enabling/disabling multiple cell measurement report trigger extensions, and location-based triggering to optimize measurement reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If measurement reporting procedure is frequently triggered to detect neighbor cells, then measurement precision is improved, but signaling overhead and latency increase
Solution Approach 1:
The patent implements periodic triggering of measurement reporting procedures based on timer configurations (e.g., T312 timer) and periodic evaluation of measurement conditions. Instead of continuous or event-driven frequent reporting, the system uses periodic intervals to trigger measurements, reducing the total number of reports while maintaining adequate detection capability for UAV mobility scenarios.
Solution Approach 2:
The patent dynamically adjusts measurement reporting parameters such as threshold values (e.g., threshold for neighbor cell quality), timer durations, and triggering conditions based on UAV mobility state, serving cell quality, and path loss characteristics. This adaptive parameter adjustment reduces unnecessary reports when conditions are stable while ensuring timely reports when handover is likely, thereby reducing overall signaling overhead.
2Measurement precision
If measurement reporting procedure is frequently triggered to detect neighbor cells, then measurement precision is improved, but latency increases
Solution Approach 1:
The patent performs preliminary actions by pre-configuring measurement parameters, thresholds, and timer values before the UAV enters critical mobility phases. The system proactively evaluates measurement conditions and prepares handover candidates in advance based on predicted UAV trajectory and serving cell quality trends, reducing the latency when actual handover decisions are needed.
Solution Approach 2:
The patent implements dynamic adjustment of measurement reporting frequency and triggering conditions based on real-time UAV mobility state, serving cell quality variations, and path loss characteristics. The system adapts the measurement reporting behavior dynamically - increasing frequency when handover is imminent and reducing it when conditions are stable, thereby optimizing the balance between detection precision and latency.
3Adaptability or versatility
If multiple cell measurement report trigger extension is enabled, then measurement coverage is improved, but device complexity increases
Solution Approach 1:
The patent implements self-service mechanisms where the UAV UE autonomously evaluates measurement conditions, determines whether to trigger measurement reports, and manages its own measurement configuration based on pre-configured parameters. The UE independently monitors serving cell quality, evaluates neighbor cell measurements, and decides on report triggering without requiring complex network-side coordination, thereby reducing overall system complexity while maintaining extensive measurement coverage.
4Reliability
If measurement reporting procedure is triggered based on serving cell quality thresholds, then reliability of handover decision is improved, but productivity decreases due to delayed reporting
Solution Approach 1:
The patent implements feedback mechanisms where measurement reports are triggered not only by absolute threshold violations but also by rate-of-change detection and trend analysis. The system continuously monitors serving cell quality and compares it against configured thresholds, and also evaluates the rate of degradation. When rapid degradation is detected, the system accelerates reporting frequency, providing feedback-driven adaptive triggering that maintains reliability while improving handover speed in critical scenarios.
Data Source
AI summary
The present application relates to methods and apparatuses for measurement enhancement for UAVUE mobility. One embodiment of the present disclosure provides a UE, which includes: a processor; and a transceiver coupled with the processor, and the transceiver is configured to: receive a first configuration for triggering a measurement reporting procedure for one or more cells, wherein the first configuration includes one of the following: a first indication associated with triggering the measurement reporting procedure when a second configuration for multiple cell measurement report trigger extension is available; a second indication associated with an update of triggered cells measurement results; or a third indication associated with a reference area of the UE; and initiate the measurement reporting procedure and transmit a measurement report.