Cell Reselection Adaptation for High-Speed Railway Terminals
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Solution Overview
Problem
Current cell reselection methods in communication technology lack flexibility, particularly for terminals on high-speed railways, as they use fixed cell reselection parameters, leading to uniform reselection probabilities for both common and high-speed railway terminals, resulting in suboptimal intra-frequency cell reselection.
Innovation Solution
The method involves acquiring cell reselection parameters set according to terminal speed, which are used to determine signal quality for both serving and neighbor cells, allowing terminals to select the best cell for residence based on their speed, thereby increasing flexibility in intra-frequency cell reselection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed cell reselection parameters are used for all terminals, then the reselection process is simple and uniform, but the flexibility and adaptability for different terminal speeds are reduced
Solution Approach 1:
The patent applies dynamics by making cell reselection parameters variable based on terminal speed. Different QHyst values are assigned to different speed ranges (e.g., QHyst1 for high-speed terminals, QHyst2 for low-speed terminals), allowing the system to adapt to changing conditions rather than using fixed parameters for all terminals.
Solution Approach 2:
The patent changes the parameter values of QHyst based on terminal speed classification. High-speed terminals receive one set of parameter values while low-speed terminals receive another set, directly implementing parameter changes to achieve speed-specific optimization without requiring complex structural modifications.
2Reliability
If uniform cell reselection parameters are applied to both high-speed and low-speed terminals, then the system operation is simple, but the cell reselection performance is suboptimal for specific scenarios
Solution Approach 1:
The patent applies local quality by assigning different QHyst values to different terminal speed categories. High-speed terminals use QHyst1 while low-speed terminals use QHyst2, ensuring that each terminal type receives parameters optimized for its specific operating conditions, thereby improving reliability without requiring complex manual configuration.
Solution Approach 2:
The terminal autonomously determines its own speed category and selects the appropriate QHyst parameter set accordingly. This self-service mechanism allows the system to achieve differentiated parameter settings without external intervention or complex centralized control, maintaining ease of operation while improving reliability.
3Adaptability or versatility
If speed-based cell reselection parameters are implemented, then the flexibility for high-speed terminals is improved, but the system requires more complex parameter management
Solution Approach 1:
The patent implements dynamics by enabling terminals to dynamically select appropriate QHyst parameters based on their current speed. The system transitions from static uniform parameters to dynamic speed-adaptive parameters, improving flexibility while managing complexity through clear speed-threshold-based selection logic.
Solution Approach 2:
The patent manages parameter complexity by establishing clear relationships between terminal speed ranges and specific parameter values. By defining distinct QHyst values for different speed categories (QHyst1 for high-speed, QHyst2 for low-speed), the system achieves adaptable parameter management without requiring overly complex configuration mechanisms.
Data Source
AI summary
The present disclosure relates to a cell reselection method and device, and a storage medium in the field of communication technology. The cell reselection method includes: a terminal acquires cell reselection parameters carried in a system message of a target cell. Since the cell reselection parameters of the target cell are set according to terminal speeds, the terminal takes its own speed into account when determining the signal quality of the target cell according to the cell reselection parameters. That is, the terminal selects one cell from a serving cell and at least one neighbor cell for residence after considering its own speed.