RFID Tag Power Adequacy Check for Data Integrity
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Solution Overview
Problem
RFID tags face challenges in ensuring sufficient power for write operations, as they consume a lot of power and can run out of energy during the process, potentially corrupting data and wasting time if not completed.
Innovation Solution
Implementing a power adequacy check by performing a pretest that consumes artificially high power levels to determine if a preset condition is met, involving the activation of components like memory and power management units to verify if there is enough power for the operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a write operation is initiated in an RFID tag, then data can be stored in the Non-Volatile Memory, but the operation consumes a lot of power and may not be completed if power runs out
Solution Approach 1:
The patent performs a pretest operation before the actual write operation to determine if sufficient power is available. This preliminary action includes activating components and monitoring voltage levels to predict whether the upcoming write operation can be completed successfully, thereby preventing power-related failures and data corruption.
Solution Approach 2:
The patent implements a feedback mechanism where voltage levels are monitored during the pretest operation, and this information is used to determine whether to proceed with the write operation. The system uses the power availability information obtained from the pretest to make an informed decision about executing the write operation, ensuring reliable data storage.
2Reliability
If a pretest operation is performed to check power adequacy, then the feasibility of write operation can be determined, but additional power consumption and time are required
Solution Approach 1:
The pretest operation performs a simplified version of the actual write operation, activating only the necessary components to assess power adequacy without completing the full write process. This partial action provides sufficient information to determine feasibility while minimizing the time and power overhead compared to performing a complete write operation.
3Measurement precision
If voltage level monitoring is implemented during pretest, then power adequacy can be accurately determined, but the system complexity increases
Solution Approach 1:
The patent uses the tag's existing power management infrastructure to perform voltage level monitoring during the pretest operation. The system leverages available components such as the power management circuit and existing voltage regulation mechanisms to obtain power adequacy information without requiring extensive additional monitoring hardware, thereby maintaining relatively simple system architecture.
Data Source
AI summary
Feasibility of a requested action by a reader is predetermined in an RFID tag based on an available tag power level. A pretest that is designed to consume artificially high levels of power is performed and the power level monitored to determine if a preset condition is met. The pretest may include activation of selected components such as a memory and associated support circuitry. If the preset condition is not met, the requested action is aborted and an error message transmitted to the reader.