Wireless Device Height-Based Relaxed Measurement for Aerial Mobility
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Solution Overview
Problem
Aerial UEs experience increased interference and fragmented coverage due to line-of-sight propagation, leading to power consumption issues and mobility performance degradation as they fly across multiple cells with time-varying direction and height, necessitating inefficient and disruptive measurement cycles.
Innovation Solution
Implementing height-based relaxed measurement cycles that adjust measurement frequencies based on the UE's current altitude, allowing for efficient power conservation while maintaining mobility performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If aerial UEs perform measurements on all configured frequencies to ensure mobility performance, then mobility reliability is improved, but power consumption increases
Solution Approach 1:
The patent applies local quality by differentiating measurement behavior based on UE altitude. Terrestrial UEs (below threshold) perform measurements on all configured frequencies, while aerial UEs (above threshold) perform relaxed measurements only on non-excluded frequencies. This localized adaptation to altitude conditions optimizes the balance between mobility reliability and power consumption for different operational contexts.
Solution Approach 2:
The patent changes the measurement parameter (measurement frequency/cycle) based on UE altitude. When UE altitude exceeds a threshold, the system adjusts measurement parameters to perform relaxed measurements with extended cycles on non-excluded frequencies, rather than maintaining constant measurement frequencies across all altitudes. This parameter adaptation resolves the contradiction by reducing power consumption while maintaining adequate mobility performance for aerial UEs.
2Use of energy by moving object
If aerial UEs exclude some frequencies from measurement candidates to reduce power consumption, then power consumption is reduced, but mobility performance degrades
Solution Approach 1:
The patent applies local quality by creating different measurement sets based on altitude. Terrestrial UEs use a complete measurement set including all frequencies, while aerial UEs use a relaxed measurement set that excludes certain frequencies. This localized differentiation ensures that power consumption is reduced for aerial UEs without completely sacrificing mobility performance, as the excluded frequencies are specifically those less critical for aerial scenarios.
Solution Approach 2:
The patent implements partial action by performing measurements on a subset of frequencies rather than all configured frequencies. For aerial UEs, measurements are performed on non-excluded frequencies with relaxed cycles, which is sufficient for their specific mobility patterns and propagation characteristics, thereby reducing power consumption while maintaining adequate mobility performance.
3Use of energy by moving object
If measurement cycles are extended for relaxed measurements to save power, then power consumption is reduced, but detection of mobility targets becomes slower
Solution Approach 1:
The patent applies local quality by implementing altitude-dependent measurement cycles. Terrestrial UEs use standard measurement cycles for timely detection, while aerial UEs use extended relaxed measurement cycles. This localized adaptation acknowledges that aerial UEs have different mobility characteristics and can tolerate longer detection times, thus achieving power savings without critically impacting mobility performance.
Solution Approach 2:
The patent implements partial action by performing relaxed measurements on a subset of non-excluded frequencies with extended cycles rather than measuring all frequencies at standard intervals. This partial measurement approach reduces power consumption while still providing sufficient mobility information for aerial UEs, accepting longer detection times as a trade-off for energy efficiency in this specific scenario.
Data Source
AI summary
A method and apparatus for height-based relaxed measurement in a wireless communication system is provided. A wireless device receives information on (i) a first measurement cycle associated with a first height range and (ii) a second measurement cycle associated with a second height range. A wireless device monitors a current height of the wireless device. A wireless device performs first measurement based on the first measurement cycle based on the current height of the wireless device being in the first height range. A wireless device performs second measurement based on the second measurement cycle based on the current height of the wireless device being in the second height range.