UAV Cell Reselection via Altitude-Adaptive Measurement Rules
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Solution Overview
Problem
Unmanned aerial vehicles (UAVs) experience increased power consumption due to frequent neighboring cell measurements and reselections when flying high, leading to instability in cellular network connections.
Innovation Solution
A method and device for configuring and sending a measurement parameter adjustment rule to UAVs, which includes altitude levels and corresponding altitude adjustment parameters, allowing the UAVs to dynamically adjust measurement parameters for cell reselection based on their current altitude, thereby reducing power consumption and improving reselection stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the UAV flies high to expand application range, then the coverage area increases, but the number of detectable neighboring cells increases causing frequent cell reselection and increased power consumption
Solution Approach 1:
The patent applies dynamics by making the cell reselection measurement parameters adaptive rather than fixed. The network configures measurement parameters including measurement bandwidth, measurement frequency, and reporting thresholds that dynamically adjust based on UAV altitude and flight state, allowing the system to optimize power consumption while maintaining connection stability across varying coverage areas
Solution Approach 2:
The patent implements parameter changes by modifying measurement parameters based on UAV altitude levels. Different altitude ranges correspond to different measurement configurations - for example, higher altitudes may use larger measurement bandwidths or adjusted reporting thresholds to reduce the frequency of cell reselection events while maintaining appropriate coverage monitoring
2Reliability
If the UAV performs frequent neighboring cell measurements to ensure connection quality, then the connection reliability improves, but the power consumption increases
Solution Approach 1:
The patent changes measurement parameters such as measurement bandwidth, measurement period, and reporting thresholds based on UAV altitude and flight state. This allows the system to maintain connection reliability by adjusting measurement frequency and depth according to actual needs rather than using fixed high-frequency measurements at all times
Solution Approach 2:
The patent applies partial action by performing measurements at different levels of intensity based on requirements. Instead of always performing full neighboring cell measurements, the system adjusts the measurement scope and frequency to match the actual connection maintenance needs at different altitude levels and flight states
3Device complexity
If the UAV uses fixed measurement parameters for cell reselection, then the system complexity is low, but the cell reselection stability deteriorates due to ping-pong effects at different altitudes
Solution Approach 1:
The patent implements dynamics by transitioning from fixed measurement parameters to adaptive parameters that change based on UAV altitude and flight state. The network configures different measurement parameters for different altitude levels, which dynamically adjusts the cell reselection behavior to prevent ping-pong effects while maintaining manageable system complexity through rule-based adaptation
Data Source
AI summary
A cell reselection method applied to a base station, includes: configuring a measurement parameter adjustment rule to be used by an unmanned aerial vehicle (UAV) in cell reselection, the measurement parameter adjustment rule including at least one UAV altitude level and each UAV altitude level corresponding to at least one altitude adjustment parameter; and sending the measurement parameter adjustment rule to the UAV.