Measurement Report Triggering for Drone Radio Resources
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Solution Overview
Problem
User devices mounted on drones, which experience an unobstructed propagation environment, frequently trigger measurement reports for multiple neighbor cells, leading to excessive radio resource consumption in existing LTE Measurement Reporting mechanisms.
Innovation Solution
A user device with a measurement report transmitting unit and a cell count judging unit that transmits measurement reports only when the number of neighbor cells fulfilling the entering condition equals or exceeds the specified number of triggering cells, as indicated by the numberOfTriggeringCell parameter, thereby reducing unnecessary reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If measurement reports are transmitted whenever any neighbor cell fulfills the entering condition, then the radio access network can detect interference timely, but the radio resource consumption increases significantly due to frequent reporting
Solution Approach 1:
The patent changes the triggering parameter from a binary condition (any cell meets threshold) to a quantitative threshold (number of cells meeting threshold). By configuring numberOfTriggeringCell, the system adjusts the reporting trigger from immediate single-cell detection to aggregated multi-cell detection, reducing reporting frequency while maintaining interference detection capability.
Solution Approach 2:
Instead of reporting for every single neighbor cell that meets the entering condition, the patent applies partial action by requiring a configured number of cells (numberOfTriggeringCell) to meet the condition before triggering a report. This selective reporting reduces unnecessary transmissions while still capturing significant interference scenarios.
2Loss of information
If measurement reports are transmitted for every triggering event, then complete measurement information is provided to the radio access network, but the frequency of transmission causes excessive radio resource usage
Solution Approach 1:
The patent introduces a new parameter numberOfTriggeringCell that transforms the reporting trigger from event-based (any triggering event) to threshold-based (configured number of triggering events). This parameter adjustment filters out minor fluctuations while preserving significant measurement information, achieving a balance between information completeness and resource efficiency.
3Difficulty of detecting and measuring
If the entering condition is triggered by a single neighbor cell, then the reporting mechanism is highly sensitive to interference, but it causes excessive reporting in unobstructed propagation environments like drones
Solution Approach 1:
The patent adjusts the sensitivity threshold by configuring numberOfTriggeringCell. In environments with unobstructed propagation (like drones), a higher threshold can be set to reduce false alarms from minor interference, while maintaining sensitivity to significant interference events. This dynamic threshold adjustment adapts the detection sensitivity to the propagation environment.
Data Source
AI summary
Based on an entering condition for reporting reception quality of a cell via Measurement Report, UE (200) transmits to a radio access network the Measurement Report. The UE (200) judges numberOfTriggeringCell that triggers transmission of the measurement report to the radio access network, and transmits the Measurement Report when the number of neighbor cells that fulfill the entering condition is equal to or more than the numberOfTriggeringCell.