Aerial UE Mobility Parameter Adjustment for Drone Handover Optimization
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Solution Overview
Problem
Aerial user terminals, such as drones, experience reduced performance due to frequent handovers and unnecessary measurements when conventional mobility management methods are applied, leading to decreased reliability and efficiency in wireless communication systems.
Innovation Solution
A method and system for adjusting mobility-related parameters based on the speed and height of aerial user terminals, involving determining units and adjusting units in user equipment and base stations to optimize parameters like cell reselection hysteresis time and trigger times, using scaling factors and event-triggered location reporting to improve mobility management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional mobility management methods are applied to aerial user terminals, then the system can maintain standard terrestrial user terminal operations, but the aerial user terminal experiences frequent handovers and unnecessary measurements leading to reduced reliability and efficiency
Solution Approach 1:
The patent adjusts mobility-related parameters (such as handover thresholds, measurement frequencies, and cell reselection criteria) based on the aerial user terminal's speed and height characteristics. By dynamically changing these parameters to match aerial mobility patterns, the system reduces unnecessary handovers and measurements while maintaining connection reliability, directly resolving the contradiction between reliability and efficiency.
2Speed
If aerial user terminals move faster and switch among cells more frequently, then the terminal can maintain coverage during flight, but unnecessary measurements and frequent handovers reduce communication reliability and efficiency
Solution Approach 1:
The system dynamically adapts mobility management parameters based on the real-time speed and height of the aerial user terminal. When the terminal moves at high speed or reaches certain height thresholds, the system adjusts parameters to allow faster cell switching with reduced measurement requirements, whereas at lower speeds it maintains more conservative parameters. This dynamic adaptation resolves the contradiction by making the system responsive to actual mobility conditions.
3Area of stationary object
If the aerial user terminal receives signals from more base stations due to flying in the air, then coverage is improved, but frequent handovers between these base stations reduce communication efficiency
Solution Approach 1:
The patent applies different mobility management strategies based on the local conditions of aerial vs. terrestrial operation. By identifying aerial user terminals through their speed and height characteristics, the system applies specialized parameter adjustments specifically for aerial mobility patterns, allowing broader coverage acceptance while reducing handover frequency through aerial-optimized thresholds and hysteresis values.
Data Source
AI summary
Provided are a method for adjusting mobility-related parameters performed by a user equipment, a user equipment, a method for adjusting mobility-related parameters performed by a base station or a base station. The method for adjusting mobility-related parameters performed by a user equipment includes: determining a speed and a height of the user equipment; and adjusting mobility-related parameters of the user equipment according to the speed and height. The method for adjusting mobility-related parameters performed by a base station includes: receiving location information reported by a user equipment; and adjusting mobility-related parameters of the user equipment according to the location information, wherein the location information is reported by the user equipment in response to occurrence of a predetermined event or at a period related to a speed and/or a height of the user equipment.