UAV Conditional Handover via Height and Flight Path Conditions
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Solution Overview
Problem
Current wireless communication technologies lack effective mobility enhancement mechanisms specifically designed for unmanned aerial vehicles (UAVs), which are essential due to varying cell deployments at different heights and flight paths.
Innovation Solution
The implementation of a conditional handover (CHO) procedure in UAVs, where the UE receives configuration information for height-based or flight path-based conditions, evaluates these conditions, and executes the CHO procedure accordingly to optimize handover decisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional handover procedures are used for UAVs, then the mobility management is simplified, but the handover success rate decreases and connection failures increase due to varying cell deployments at different heights
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple candidate cells with different height requirements before the actual handover occurs. The UE is provided with a list of candidate cells and their associated height conditions in advance, allowing the UE to evaluate and prepare for handover decisions without complex real-time network coordination, thereby improving handover success rate while managing complexity
Solution Approach 2:
The patent implements dynamics by making the handover conditions adaptive rather than fixed. The UE evaluates dynamic conditions including current height, flight path, and real-time signal strength against the pre-configured candidate cell parameters. This dynamic evaluation allows the system to automatically adjust handover decisions based on current operational state, improving reliability without requiring overly complex manual management
2Productivity
If height-based conditions are considered for handover, then the network resource allocation is optimized, but the handover decision complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the handover decision process into independent evaluation steps. Each candidate cell has associated height conditions and signal strength thresholds that can be evaluated separately. The UE segments the decision-making process into: (1) evaluating height conditions, (2) evaluating signal strength, (3) selecting the best candidate. This segmentation simplifies the overall complexity while enabling optimized resource allocation based on height-specific network characteristics
Solution Approach 2:
The patent implements parameter changes by using height as a key parameter to differentiate handover conditions. Instead of using a single uniform handover threshold, the system adjusts parameters such as signal strength thresholds and candidate cell selection criteria based on the UE's current height. This allows optimized network resource allocation for different altitude levels while maintaining manageable decision complexity through parameterized conditions
3Adaptability or versatility
If flight path based conditions are used, then the mobility management is optimized for UAV-specific scenarios, but the measurement and detection difficulty increases
Solution Approach 1:
The patent applies the intermediary principle by using height information as a mediator parameter between the UE's flight path and the handover decision. Instead of directly measuring complex flight path trajectories, the system uses height as an intermediate parameter that indirectly reflects the UE's position and movement characteristics. This mediator approach enables UAV-specific mobility optimization while significantly reducing measurement and detection complexity compared to direct flight path monitoring
Data Source
AI summary
Embodiments of the present application relate to methods and apparatuses for mobility enhancements for an unmanned aerial vehicle (UAV). According to an embodiment of the present application, a user equipment (UE) includes a processor and a transceiver coupled to the processor; and the processor is configured: to receive, via the transceiver, configuration information of a conditional handover (CHO) procedure regarding at least one of a height based condition or a flight path based condition; to evaluate whether at least one execution condition for at least one candidate cell of the CHO procedure is satisfied, wherein the at least one execution condition includes the at least one of the height based condition or the flight path based condition; and to execute the CHO procedure upon the at least one execution condition being satisfied.