Terminal Device Frequency Priority Configuration for Satellite Cell Selection
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Solution Overview
Problem
Current communication systems, particularly those involving medium earth orbiting (MEO) and low earth orbiting (LEO) satellites, face challenges in cell selection and reselection due to the high-speed motion of satellites relative to the ground, leading to restricted configuration options and limited applicability of existing frequency priority settings.
Innovation Solution
A communication method that determines a relative priority relationship between neighboring cell frequencies and serving cell frequencies, allowing for flexible configuration by indicating whether the neighboring cell frequency is higher or lower than the serving cell frequency, enabling improved cell selection and reselection in satellite communication systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing frequency priority settings are used for cell selection and reselection, then the configuration is simple and straightforward, but the applicability is limited for satellite communication systems with high-speed moving satellites
Solution Approach 1:
The patent introduces dynamic priority adjustment mechanisms that adapt frequency priorities based on satellite motion characteristics and communication scenarios. The system can dynamically modify serving cell and neighboring cell frequency priorities according to real-time conditions, enabling flexible adaptation to high-speed satellite movement while maintaining manageable configuration through automated adjustments.
Solution Approach 2:
The patent modifies the frequency priority parameters from static fixed values to dynamic relative relationships. By establishing priority relationships between neighboring cell frequencies and serving cell frequencies, and introducing offset values that can be adjusted based on satellite ephemeris and motion state, the system achieves enhanced adaptability to satellite communication scenarios without requiring complete redesign of the selection mechanism.
2Reliability
If static frequency priority configurations are used, then the system is easy to implement, but it cannot effectively handle the high-speed motion of MEO/LEO satellites
Solution Approach 1:
The patent implements self-service mechanisms where the terminal device autonomously determines frequency priorities based on received satellite ephemeris information and motion state. The system automatically calculates relative priorities between neighboring and serving cells without requiring complex manual configuration, thereby maintaining ease of operation while improving cell selection accuracy through adaptive algorithms that self-adjust to current operational conditions.
3Productivity
If traditional cell reselection methods are applied to satellite systems, then the procedure is straightforward, but the unidirectional motion characteristic of satellites cannot be properly utilized
Solution Approach 1:
The patent introduces feedback mechanisms that continuously monitor satellite position, velocity, and motion direction to dynamically adjust cell reselection priorities. By incorporating real-time feedback from ephemeris data and motion state information, the system can detect changes in satellite trajectory and update frequency priorities accordingly, enabling efficient and adaptive cell reselection that exploits the directional motion characteristics of MEO/LEO satellites.
Data Source
AI summary
Provided in the embodiments of the present disclosure are a communication method and a terminal device. The method includes obtaining, by a terminal device, a priority relationship between a priority of at least one neighboring cell frequency and a priority of a serving cell frequency. The priority relationship includes the priority of a first neighboring cell frequency being higher or lower than the priority of the serving cell frequency, the at least one neighboring cell frequency including the first neighboring cell frequency. In this way, configuration flexibility may be improved.