Cell Reselection Testing for High-Speed Railway Terminals
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Solution Overview
Problem
There is no definitive method for testing the cell reselection capability of LTE terminals, particularly during high-speed mobile processes, which is critical for maintaining communication quality on high-speed railways.
Innovation Solution
A method and device that adjust the transmission power of a terminal's current and neighboring cells to simulate a cell reselection process, using a system simulator to detect whether the terminal successfully camps on a new cell after a preset time threshold, thereby testing and verifying the terminal's cell reselection capability in high-speed or intermediate-speed mobile modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If cell reselection judgment is performed using conventional parameters during high-speed mobile process, then terminal can maintain basic communication capability, but cell reselection time is too long to meet high-speed railway requirements
Solution Approach 1:
The patent changes the cell reselection parameters specifically for high-speed mobile scenarios. When the terminal detects it is in a high-speed mobile state (above threshold speed), it switches to high-speed cell reselection parameters including a shorter reselection time window and adjusted signal strength thresholds, enabling faster cell reselection while maintaining communication reliability during high-speed railway scenarios
2Loss of time
If terminal performs cell reselection quickly during high-speed mobile, then communication continuity is improved, but cell reselection accuracy may deteriorate due to reduced judgment time
Solution Approach 1:
The patent implements dynamic cell reselection parameters that adapt to terminal movement speed. The system continuously monitors terminal speed and dynamically adjusts the cell reselection time window and signal thresholds. For high-speed scenarios, it uses shortened time windows with optimized thresholds that maintain sufficient judgment accuracy despite reduced time, while for low-speed scenarios it uses conventional longer time windows for higher accuracy
3Ease of manufacture
If no definitive testing method is established for cell reselection capability, then terminal development can proceed without specialized tests, but cell reselection performance during high-speed mobile cannot be verified
Solution Approach 1:
The patent establishes a cell reselection capability testing method that is performed in advance during terminal production and approval processes. The test simulates high-speed mobile scenarios by moving the terminal at controlled speeds through cell boundaries and verifies whether the terminal correctly applies high-speed cell reselection parameters and achieves successful reselection within required time windows, ensuring capability verification before terminal deployment
Data Source
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AI summary
The disclosed refers to a method for testing a cell reselection capability of a terminal. The method comprises: adjusting a terminal to camp on a current cell and to enter a high-speed or intermediate-speed mobile mode (101); adjusting transmission power of the current cell and a neighboring cell, so that the current cell and the neighboring cell satisfy a condition of reselection from the current cell to the neighboring cell in the high-speed or intermediate-speed mobile mode (102); and maintaining the adjusted transmission power, and after a preset time threshold is reached, detecting whether the terminal camps on the neighboring cell to confirm whether the terminal successfully performs cell reselection (103). The disclosure implements the test on whether the terminal has a cell reselection capability in the high-speed or intermediate-speed mobile state, so that whether the terminal has the cell reselection capability can be approved and tested in actual production.