Crystal Oscillator Parameter Adjustment for Wireless Time Frequency Accuracy
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Solution Overview
Problem
User equipment in wireless communications faces challenges in maintaining time and frequency accuracies due to factors such as movements of communication nodes and temperature variations, leading to time and frequency shifts in uplink and downlink signals.
Innovation Solution
The user equipment includes a crystal oscillator and processing circuitry that transmits oscillator parameters, receives scheduling information, and adjusts operations to compensate for time and frequency shifts, thereby maintaining accurate transmission signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If user equipment uses fixed transmission parameters, then device complexity is reduced, but time and frequency accuracy deteriorates due to node movements and temperature variations
Solution Approach 1:
The patent implements dynamic transmission parameter adjustment by continuously monitoring oscillator characteristics and adapting transmission parameters in real-time. The system transitions from fixed parameters to dynamic parameters that respond to changing conditions such as node movements and temperature variations, thereby maintaining time and frequency accuracy without requiring overly complex manual intervention mechanisms.
Solution Approach 2:
The patent employs feedback mechanisms where the user equipment monitors its own oscillator performance and communicates this information to the communication node. The node uses this feedback to adjust scheduling parameters and transmission timing, creating a closed-loop system that continuously refines time and frequency accuracy based on actual performance data.
2Reliability
If user equipment dynamically adjusts transmission parameters to compensate for time and frequency shifts, then communication reliability is improved, but processing complexity increases
Solution Approach 1:
The user equipment autonomously monitors its oscillator characteristics and performs self-adjustment of transmission parameters without requiring constant external control. The device uses its own sensors and processing capabilities to detect time and frequency shifts and automatically compensates, reducing the burden on the communication node and simplifying the overall system architecture while maintaining high reliability.
Solution Approach 2:
The patent systematically changes transmission parameters such as timing advance and frequency offset based on measured oscillator drift. By establishing clear relationships between oscillator parameters and transmission settings, the system achieves reliable communication through parameter adaptation without requiring complex algorithmic processing, as the parameter changes follow predictable patterns and formulas.
3Measurement precision
If the communication node schedules uplink and downlink resources based on oscillator parameters, then time and frequency accuracy is maintained, but scheduling complexity increases
Solution Approach 1:
The communication node performs preliminary scheduling adjustments based on advance knowledge of oscillator characteristics and reported parameters. By preparing scheduling decisions in advance and using predictive models of time and frequency drift, the node can maintain accurate timing without requiring complex real-time calculations during the actual communication, thereby reducing scheduling complexity while preserving accuracy.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution effectively reduces time and frequency shifts, ensuring that user equipment maintains accurate communication channel boundaries, thereby improving communication quality and reliability.
Implementation Method 1
User equipment includes one or more antennas, a receiver coupled to the one or more antennas, a transmitter coupled to the one or more antennas, an oscillator, and processing circuitry
Data Source
AI summary
A user equipment includes one or more antennas, a receiver coupled to the one or more antennas, a transmitter coupled to the one or more antennas, an oscillator, and processing circuitry coupled to the receiver, the transmitter, and the oscillator. The processing circuitry transmits one or more oscillator parameters associated with the oscillator from the transmitter, receives uplink scheduling or downlink scheduling based on the one or more oscillator parameters from the receiver, and adjusts one or more operations based on the uplink scheduling or the downlink scheduling.