RFID Session Control Broadcaster for Hidden Tag Detection
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Solution Overview
Problem
Conventional RFID systems face challenges in tracking a large number of RFID tags due to unreadable tags in null spots, leading to inefficiencies in inventory management, especially when tags are briefly in hot spots and not detected during inventory rounds.
Innovation Solution
Offload session control tasks from the RFID reader to a separate device, such as a session control broadcaster, to manage readability states of RFID tags, allowing the RFID reader to focus on inventory operations and improve tag detection by increasing the frequency of inventory rounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the RFID reader performs both session control tasks and inventory read tasks, then the system can manage tag readability states, but the frequency of inventory rounds is reduced and hidden tags are not detected
Solution Approach 1:
The patent divides the RFID reader's functionality into two separate devices: a session control broadcaster that handles session control tasks, and an inventory reader that performs inventory read tasks. This segmentation allows the inventory reader to increase the frequency of inventory rounds without being constrained by session control operations, thereby improving hidden tag detection while maintaining tag management capabilities.
Solution Approach 2:
The session control broadcaster acts as an intermediary device that manages tag readability states independently from the inventory reader. This intermediary allows the inventory reader to focus solely on detecting tags without the overhead of session control, enabling more frequent inventory rounds and improved detection of hidden tags that briefly appear in hot spots.
2Reliability
If the RFID reader increases the frequency of inventory rounds to detect hidden tags, then tag detection improves, but session control tasks cannot be performed
Solution Approach 1:
By segmenting the reader functionality into a dedicated session control broadcaster and an inventory reader, the system can independently optimize both functions. The session control broadcaster maintains manageable session control operations while the inventory reader performs frequent detection cycles, resolving the conflict between operational ease and detection reliability.
Solution Approach 2:
The session control broadcaster serves as an intermediary that handles session control management separately from inventory detection. This allows the inventory reader to increase the frequency of inventory rounds for better hidden tag detection without compromising session control management, as the broadcaster independently maintains tag readability states.
3Adaptability or versatility
If session control tasks are performed by the RFID reader, then tag readability can be managed, but the reader cannot focus exclusively on inventory operations
Solution Approach 1:
The patent applies segmentation by separating session control functionality from inventory reading functionality into distinct devices. The session control broadcaster manages tag readability states and adapts to different control requirements, while the inventory reader maintains high productivity by focusing exclusively on detection operations without the burden of session control management.
Solution Approach 2:
The session control broadcaster functions as an intermediary that provides adaptable tag reading control independently from the inventory reader. This intermediary enables the inventory reader to operate at maximum efficiency by dedicating resources solely to inventory operations, while the broadcaster handles the adaptability requirements of tag control.
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
Enhances the detection of hidden RFID tags by allowing the RFID reader to spend more time on inventory operations, reducing the likelihood of tags remaining undetected when briefly in hot spots, and providing granular control over tag reading operations.
Implementation Method 1
RFID tags are circuits that are configured to receive a radio-frequency (RF) signal and respond to that RF signal with a corresponding RF response signal
Implementation Method 2
an RFID reader to perform inventory read operations by transmitting RF signals that serve as read request messages for reception by the RFID tags
Data Source
AI summary
Systems and methods for radio-frequency identification (RFID) are disclosed where session control tasks are offloaded from an RFID reader to a separate device which can take the form of an RFID transmitter such as a session control broadcaster. Accordingly, the RFID transmitter transmits messages to RFID tags to control which of the tags within range of the RFID transmitter are in a readable state and/or unreadable state. These messages can take the form of session control messages, and these session control messages can be targeted to tags of interest, such as RFID tags that are deemed to be moving. By offloading the transmission of messages that control the readability of tags to a separate RFID transmitter, the system frees up the RFID reader to spend more time on inventory read operations, which reduces the risk that an RFID tag will stay hidden when it briefly exists in a hot spot.