RFID Tag IC Manufacturer Detection via Backscatter Reply Frequency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Determining the manufacturer of an RFID tag IC is time-consuming, especially when tagged items are moving fast by an RFID reader, as it typically requires completing an inventory round and a Read command exchange.
Innovation Solution
An RFID reader system identifies the manufacturer of an RFID IC by transmitting commands with specific reply frequencies and analyzing the backscattered response frequencies, allowing faster identification without a full inventory round.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a full inventory round and Read command exchange is performed to determine the tag's manufacturer, then accurate identification of the manufacturer is achieved, but the process becomes time-consuming and impractical for fast-moving items
Solution Approach 1:
The patent extracts only the essential information needed for manufacturer identification from the tag's backscatter response, rather than performing a complete inventory round. By analyzing specific frequency characteristics in the backscatter signal, the system obtains manufacturer identification data without requiring the full sequence of inventory commands and Read operations, thus reducing time while maintaining identification accuracy
Solution Approach 2:
The system performs preliminary analysis of the backscatter frequency characteristics immediately upon receiving the tag's response, before completing the full inventory process. This preliminary frequency analysis provides manufacturer identification information in advance, allowing the system to skip time-consuming subsequent steps while still achieving accurate identification
2Loss of information
If traditional RFID inventory and Read command methods are used, then complete tag information is obtained, but processing speed decreases for rapidly moving items
Solution Approach 1:
The patent extracts manufacturer identification information directly from the backscatter frequency characteristics without requiring complete tag inventory. By focusing only on the frequency analysis of the backscatter signal, the system obtains the necessary manufacturer data while eliminating the need for complete information exchange, thereby increasing processing speed for fast-moving items
Solution Approach 2:
The system skips the traditional multi-step inventory and Read command sequence by rushing through to a direct frequency-based identification method. By analyzing the backscatter frequency characteristics immediately, the system rushes to obtain manufacturer identification without waiting for complete tag information exchange, thus improving productivity for rapidly moving items
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
Enables rapid identification of RFID tag IC manufacturers and features, facilitating efficient processing of rapidly moving items.
Implementation Method 1
The tag either generates the transmitted back RF wave originally, or by reflecting back a portion of the interrogating RF wave in a process known as backscatter.
Data Source
AI summary
An RFID tag IC manufacturer may be identified using a backscatter link frequency. An RFID reader may transmit a command, such as a Query-type command, and include an analog parameter specifying a first reply frequency and a digital parameter specifying a second reply frequency different from the first reply frequency. A receiving the command, RFID tag IC may respond using either the first reply frequency or the second frequency, depending on its manufacturer. For example, a first RFID tag IC with a set of first features may use the first reply frequency, while a second RFID tag IC with a set of second features may reply using the second BLF, or vice versa. The RFID reader, upon receiving the RFID tag IC response, may identify a manufacturer of the RFID tag IC based on the reply frequency, and infer one or more features and capabilities of the RFID tag IC.