Wireless Handover Trigger Adjustment for High Mobility
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Solution Overview
Problem
In wireless communication systems, particularly in proximity-based services like device-to-device communication, efficient and accurate cell handover is challenging due to the need for rapid channel switching when mobile stations move between cells, especially in scenarios like vehicle-to-vehicle communication where high mobility and reliability are critical.
Innovation Solution
A wireless communication apparatus and method that acquires information on movement relative to a serving base station, adjusts trigger conditions for measurement reports, and controls their transmission to optimize cell handover processes, including adjusting time-to-trigger based on movement parameters like angle and velocity, and enabling joint handover judgments for proximal devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cell handover is performed rapidly to maintain uninterrupted communication during mobile station movement, then communication continuity is improved, but handover accuracy deteriorates leading to ping-pong effects
Solution Approach 1:
The system performs preliminary actions by acquiring movement information (velocity, angle) before handover decision, and adjusts trigger conditions in advance based on this information. This allows the system to prepare appropriate handover parameters beforehand, enabling both rapid response and accurate decision-making without the ping-pong effect.
Solution Approach 2:
The trigger conditions for handover are made dynamic by adjusting them based on real-time movement information. Instead of using fixed thresholds, the system adapts the trigger conditions according to the mobile station's velocity and movement angle, allowing optimal handover timing that accounts for current mobility state.
2Measurement precision
If measurement report transmission is triggered frequently to improve handover decision accuracy, then handover accuracy is improved, but system overhead and complexity increase
Solution Approach 1:
Instead of continuously transmitting measurement reports or using overly frequent triggering, the system applies partial action by selectively triggering reports only when movement conditions warrant it. This reduces unnecessary signaling overhead while maintaining sufficient accuracy for handover decisions.
Solution Approach 2:
The system changes parameters dynamically by adjusting trigger conditions based on movement velocity and angle. This allows the system to optimize the balance between reporting frequency and overhead - using more frequent reporting only when movement patterns indicate potential handover scenarios, and reducing reporting when movement is stable.
Data Source
AI summary
A wireless communication device and a wireless communication method. A wireless communication device for use in a user equipment side includes one or more processors. The processor is configured to: obtain information about movement of the wireless communication device relative to a serving base station thereof; adjust a triggering condition for sending a measurement report for use in cell handover based on the information; and control sending of the measurement report according to the adjusted triggering condition.