Conditional Handover Planning for UAM Corridor Cell Transitions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The rapid speed of UAM aerial vehicles leads to frequent and challenging handovers due to rapid changes in wireless channel environments, causing delays and potential communication quality issues, especially affecting command & control information reliability.
Innovation Solution
A handover support method and device that determine a combination of source and target cell candidates based on preset corridor information, enabling conditional handover without measurement reports or command transmissions, ensuring smooth transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If general handover procedure is applied to UAM aerial vehicles, then handover can be performed following standard protocol, but handover delay increases due to measurement report, procedure preparation, and command transmission time
Solution Approach 1:
The patent applies preliminary action by pre-determining handover target cells and preparing handover commands before the aerial vehicle actually needs to handover. The base station identifies candidate target cells in advance based on the aerial vehicle's movement trajectory and pre-configures handover parameters, so that when handover is triggered, the command can be executed immediately without measurement reporting delays.
Solution Approach 2:
The patent implements skipping by eliminating the measurement report transmission step and rushing through the handover process using pre-configured parameters. The aerial vehicle directly executes the pre-prepared handover command without performing standard measurement reporting, thereby skipping the time-consuming measurement and reporting phases of conventional handover.
2Area of stationary object
If base station spacing is widened for rural areas with fewer users, then network coverage area increases, but handover frequency increases due to aerial vehicle's fast operating speed
Solution Approach 1:
The patent applies preliminary action by pre-identifying multiple candidate target cells along the aerial vehicle's trajectory and pre-configuring handover parameters for each candidate. This allows the system to handle frequent handovers efficiently by having preparation work already done in advance, turning the frequent handover requirement into an advantage for demonstrating the pre-configured system's effectiveness.
3Speed
If rapid handover is performed due to sudden signal strength decrease, then connection to target cell can be established quickly, but data transmission through deteriorated source cell uplink/downlink continues during transition
Solution Approach 1:
The patent applies preliminary action by pre-determining the optimal handover execution timing and pre-configuring the handover command with all necessary parameters. The base station calculates when handover should occur based on predicted signal strength trends and aerial vehicle trajectory, then prepares the command in advance so execution happens at the precise optimal moment without unnecessary delays or continued transmission through deteriorated channels.
Data Source
AI summary
There is provided a handover support method to be performed by a wireless communication support device for supporting wireless communication for an aerial vehicle. The method comprises obtaining information on a preset corridor for the aerial vehicle; determining a combination of a source cell candidate and a target cell candidate for handover based on of the information on the preset corridor among wireless cells providing wireless communication for the aerial vehicle; and transmitting information on conditional handover (CHO) to the aerial vehicle according to the determined combination of the source cell candidate and the target cell candidate.