RFID Tag CDL Command for Sensor Data Access
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current RFID systems lack specific commands to effectively communicate with data loggers and sensor units integrated into RFID tags, limiting their functionality and efficiency in data retrieval and sensor data management.
Innovation Solution
A new RFID communication protocol command, the Communicate With Data Logger Command (CDL Command), is introduced, allowing the RFID reader to communicate with data loggers and sensor units by using a global proprietary command that includes control bits and data payload/index information, enabling efficient data access and error detection through Index and Data Registers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If standard RFID communication protocols are used, then basic RFID functionality is maintained, but communication with integrated data loggers and sensor units is limited or impossible
Solution Approach 1:
The patent segments the RFID communication protocol into distinct command types, including a specific 'Communicate with Data Logger Command' for accessing data logger functions and separate commands for sensor unit communication. This segmentation allows the system to maintain standard RFID operations while adding specialized communication pathways for data loggers and sensors without interfering with basic functionality.
Solution Approach 2:
The patent implements a universal command structure that can handle multiple communication needs through a single protocol framework. The RFID reader can use the same basic communication infrastructure to perform tag identification, data logger communication, and sensor unit interaction, making the system multi-functional while maintaining protocol consistency.
2Productivity
If existing RFID protocols are used without modification, then system simplicity is maintained, but data retrieval efficiency from data loggers is insufficient
Solution Approach 1:
The patent implements preliminary actions by introducing command structures that prepare and configure data logger communication before actual data retrieval. The protocol includes commands to establish communication mode, configure data logger parameters, and pre-position the RFID reader for efficient data transfer, thereby improving retrieval efficiency while keeping the added complexity manageable through structured sequencing.
3Adaptability or versatility
If no specific commands for data loggers are implemented, then protocol simplicity is maintained, but sensor data management functionality is limited
Solution Approach 1:
The patent introduces an intermediary command layer that mediates between the RFID reader and the data logger/sensor unit. This intermediary protocol structure provides standardized interfaces for sensor data management while maintaining operational simplicity through consistent command formats and automated handling of communication details, making complex sensor data management accessible through simple standardized commands.
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
The CDL Command facilitates efficient data transfer and error detection, allowing sequential access with reduced overhead, lower power consumption, and improved communication between RFID readers and integrated data loggers and sensors, enhancing the overall performance of RFID systems in managing sensor data and logger operations.
Implementation Method 1
An RFID tag (e.g., RFID tag 130) does not have an on-chip battery, but rather receives its energy from the incoming RF signal from the reader unit 120. The RFID tag 130 uses the energy from the incoming RF signal to extract the data that is stored in the chip of the RFID tag 130
Implementation Method 2
In one embodiment of an RFID system the reader unit transmits data to an RFID tag with an amplitude modulated (AM) radio frequency (RF) signal having a frequency in the range from nine hundred MegaHertz (900 MHz) to two and fourth tenths GigaHertz (2.4 GHz)
Data Source
AI summary
A system and method is disclosed for communicating with sensors/loggers in integrated radio frequency identification (RFID) tags. An RFID reader uses a Communicate With Data Logger Command to communicate with a data logger in an RFID tag. The RFID reader performs data access processes using an Index Register and a Data Register of the RFID tag. The RFID reader selects one of (1) Index Read access (2) Index Write access (3) Data Write access (4) Data Read access with parity and (5) Data Read access with cyclic redundancy check (CRC). The RFID tag performs the requested data access and then performs an error detection process.