Cell Reselection Frequency Priority Adaptation for High-Speed Rail
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Solution Overview
Problem
Current cell reselection methods in communication technology lack flexibility as they use the same frequency priority rankings for high-speed-railway dedicated networks and public LTE networks, leading to reduced flexibility in terminal cell selection, especially when terminal speed is not accurately considered.
Innovation Solution
Implementing a system where base stations send system messages with multiple frequency priority rankings set for different terminal speeds, allowing terminals to select a suitable frequency priority ranking based on their own speed, thereby improving cell reselection flexibility by prioritizing high-speed-railway dedicated networks at high speeds and public LTE networks at low speeds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the same frequency priority ranking is used for both high-speed-railway dedicated networks and public LTE networks, then the system maintains simplicity in configuration and management, but the terminal's flexibility in cell reselection is reduced and network congestion occurs on high-speed-railway dedicated networks
Solution Approach 1:
The patent divides the single frequency priority ranking into multiple frequency priority rankings corresponding to different terminal speeds. Terminals select different frequency priority rankings based on their speed, allowing high-speed terminals to prefer high-speed-railway dedicated networks while low-speed terminals prefer public LTE networks, thus resolving the contradiction between adaptability and complexity
Solution Approach 2:
The patent introduces dynamic frequency priority rankings that change based on terminal speed conditions. Instead of a static single ranking, the system provides multiple rankings that terminals dynamically select according to their movement state, improving adaptability while maintaining manageable complexity through standardized speed thresholds
2Reliability
If terminals always prioritize high-speed-railway dedicated network frequencies, then high-speed railway coverage is improved, but public LTE networks experience congestion and terminals not on high-speed railways suffer from reduced service quality
Solution Approach 1:
The patent applies different frequency priority rankings to different terminal scenarios based on speed. High-speed terminals receive priority configuration for high-speed-railway dedicated networks, while low-speed terminals receive priority for public LTE networks, ensuring each terminal group gets optimized service quality appropriate to its local condition
Solution Approach 2:
The patent changes the frequency priority parameter based on terminal speed condition. By introducing speed as a parameter that determines which frequency priority ranking to use, the system achieves adaptive network selection that improves reliability for each terminal group while maintaining overall system versatility
3Reliability
If terminals carry out frequent cell reselection scans to ensure optimal connection, then connection quality is maintained, but terminal power consumption increases and scanning efficiency decreases
Solution Approach 1:
The patent performs preliminary cell reselection by having terminals scan frequencies and select target cells before actual data transmission begins. By completing the cell selection process in advance based on frequency priority rankings, terminals avoid frequent scanning during data transmission, reducing power consumption while maintaining connection quality
Data Source
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AI summary
Disclosed are a cell reselection method and device, and a storage medium, which belong to the field of communication technology. The method includes: determining at least two frequency priority rankings carried in a received system message; selecting a target frequency priority ranking from the at least two frequency priority rankings; and carrying out cell reselection according to the target frequency priority ranking. Since the at least two frequency priority rankings are set for different terminal speeds, by means of the cell reselection methods provided by the embodiments of the present disclosure, a terminal can select, according to its own situation, a suitable frequency priority ranking to carry out cell reselection. Thus, the flexibility in carrying out cell reselection by the terminal is improved.