Mobile Terminal Air-Interface Timing With Adaptive Source Selection
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Solution Overview
Problem
Existing timing over air interface technologies fail to maintain high-precision time synchronization in mobile terminal devices due to signal strength variations and network switching, leading to unreliable clock synchronization.
Innovation Solution
A method for a mobile terminal device that dynamically selects between using time synchronization messages from a base station or locally maintained time information based on preset conditions, such as signal strength and precision thresholds, to ensure consistent time synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If timing over air interface technology is used for mobile terminal devices, then cost is reduced (avoiding GPS/Beidou systems), but time synchronization precision deteriorates during signal strength variations and network switching
Solution Approach 1:
The patent implements dynamic time synchronization by continuously monitoring signal strength and network switching events, adjusting the synchronization source selection in real-time based on current conditions. The terminal device dynamically switches between using base station timing and local clock based on signal quality thresholds, ensuring optimal time precision across varying mobile conditions.
Solution Approach 2:
The patent changes the parameter of synchronization source selection based on signal strength thresholds and network switching states. By monitoring parameters like RSRP (Reference Signal Received Power) and detecting network switching events, the system adjusts which time source to use, transforming a static synchronization approach into an adaptive one that maintains precision despite signal variations.
2Adaptability or versatility
If the terminal device switches among different signal strength ranges, then adaptability improves, but time synchronization reliability deteriorates with existing timing schemes
Solution Approach 1:
The patent implements feedback mechanisms by continuously monitoring signal strength (RSRP) and network switching events, then using this feedback to determine whether to switch synchronization sources. The terminal device compares current signal conditions against predefined thresholds and adjusts its timing source selection accordingly, creating a closed-loop system that maintains synchronization reliability across different signal ranges.
Solution Approach 2:
The patent introduces an intermediary decision-making mechanism that selects between base station timing and local clock based on intermediate parameters like signal strength and network switching state. This intermediary layer processes the raw signal conditions and translates them into appropriate synchronization source selection, ensuring reliable timing even during transitions between different signal strength ranges.
3Productivity
If the terminal device frequently switches access network devices, then network optimization improves, but timing precision deteriorates during the switching process
Solution Approach 1:
The patent applies preliminary action by detecting network switching events before they complete and proactively preparing the timing synchronization strategy. When a network switching event is detected, the system preemptively adjusts the synchronization source selection based on the target network's expected signal characteristics, ensuring timing precision is maintained throughout the switching process rather than reacting after the switch occurs.
Data Source
AI summary
A timing method over air interface, a mobile terminal device and a readable storage medium are disclosed. The method may include: receiving a broadcast message transmitted by a base station, the broadcast message including a time synchronization message; when a synchronization time source is the time synchronization message, executing a time synchronization strategy to determine whether the time precision of the base station satisfies a preset condition; if the time precision of the base station satisfies the preset condition, continuously using the time synchronization message as the synchronization time source; and, if the time precision of the base station does not satisfying the preset condition, using local maintenance time information as the synchronization time source.