Passive RFID Protocol Switching for Timing Error Compensation
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Solution Overview
Problem
Passive RFID systems using inductive coupling face challenges in ensuring error-free data transmission due to parameter-dependent timing variations, which can lead to corrupted character sequences when transponders do not support specific transmission protocols.
Innovation Solution
A method allowing wireless data transmission between a base station and a passive transponder using inductive coupling, enabling selection between data transmission protocol types by writing a configuration register, either remotely or during manufacturing, with or without transmitting a reference duration for calibration, to accommodate different protocol types and compensate for timing variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the quality of the parallel resonant circuit is increased to enable power supply at greater distances, then the transmission range is improved, but the timing precision of detected field gaps deteriorates
Solution Approach 1:
The patent applies preliminary action by transmitting a reference duration (calibration value) before the actual data transmission. This reference duration allows the transponder to pre-calculate a calibration value that compensates for timing variations caused by high-quality resonant circuits. By performing this calibration beforehand, the system maintains both extended transmission range and accurate timing measurement for subsequent character decoding.
2Adaptability or versatility
If different data transmission protocol types are supported, then the adaptability of the transponder is improved, but the device complexity increases
Solution Approach 1:
The patent implements parameter changes by introducing a configuration register that can be set to different values to select between protocol types. Rather than implementing multiple complete protocol stacks, the system changes key operational parameters (such as whether to expect and process a reference duration) based on the register setting. This allows a single transponder design to support both protocols with minimal complexity increase.
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 approach provides high flexibility in using various data transmission protocols, ensuring error-free data transmission by dynamically setting the protocol type and calibrating signal durations, thus overcoming parameter-dependent timing issues and enabling compatibility with different transponders.
Implementation Method 1
Method for wireless data transmission between a base station and a passive transponder by inductive coupling
Data Source
AI summary
A method for wireless data transmission, in, for example, RFID systems, between a base station and a passive transponder, as well as a passive transponder is provided by inductive coupling, as well as a passive transponder. It is possible to transmit data from the base station to the transponder by a first data transmission protocol type and by at least one second data transmission protocol type, whereby the first or the at least second data transmission protocol type is selected by writing a configuration register in the transponder.