RFID Transponder Grouping for Limited-Bandwidth Response Processing
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Solution Overview
Problem
The existing RFID systems face limitations in processing a large number of transponder responses due to a limited reception bandwidth of the RFID receiver, leading to a high probability of losing unprocessable responses.
Innovation Solution
An RFID method involving classification of transponders into groups, selection of group representatives, and assignment of parameters to other group members, utilizing broadcasting and multicasting transmission methods, and artificial intelligence for efficient data processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the RFID receiver receives a large number of RFID transponder responses simultaneously, then the coverage area and detection capability are improved, but the reception bandwidth is exceeded and responses are lost
Solution Approach 1:
The patent segments the population of RFID transponders into multiple groups, with each group identified by a unique group identifier. The receiver processes one group at a time by transmitting group-specific query signals, thereby dividing the overwhelming task of handling all transponders simultaneously into manageable segments that fit within the receiver's bandwidth constraints.
Solution Approach 2:
The system employs periodic action by cycling through different RFID transponder groups in sequential time slots. The receiver transmits query signals for one group, collects responses, then moves to the next group in a periodic manner. This time-division multiplexing approach allows the receiver to handle multiple groups over time without exceeding its instantaneous processing capacity.
2Loss of information
If all RFID transponder information is collected and processed, then the data completeness is improved, but the data processing time and complexity increase
Solution Approach 1:
The patent extracts only the essential group identifier information from each RFID transponder response rather than processing complete transponder data for all transponders. By focusing on extracting and processing just the group identification aspect, the system achieves efficient grouping while minimizing processing time and complexity.
Solution Approach 2:
The system performs preliminary action by pre-organizing transponders into groups and pre-transmitting group identifier information. This allows the receiver to quickly identify and filter transponders belonging to the currently active group without having to process complete transponder data from all groups simultaneously, thereby reducing processing time.
3Measurement precision
If the RFID receiver processes responses from all RFID transponders in the field, then the measurement accuracy is improved, but the reception bandwidth is exceeded
Solution Approach 1:
The patent segments the transponder population into distinct groups and processes each group separately through dedicated time slots. This segmentation ensures that the receiver maintains high measurement precision for each group by dedicating full bandwidth attention to one group at a time, while overall productivity is maintained through the systematic cycling through multiple groups.
Solution Approach 2:
The system uses periodic action to cycle through different transponder groups in sequential time slots. During each period dedicated to a specific group, the receiver achieves high measurement precision for that group's transponders. The periodic repetition across multiple groups maintains overall system productivity despite the sequential processing approach.
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 method ensures reliable collection of RFID data from multiple transponders within a limited reception bandwidth by reducing data volume and ensuring monitoring of transponder movements, even when the receiver capacity is constrained.
Implementation Method 1
The use of high-frequency electromagnetic (radio) waves (RFID radiation) for object identification and information transfer between RFID transponders ('tags') and readers (RFID receivers) is a widely used technology
Implementation Method 2
The RFID transponders receive the RFID transmit radiation and convert it into RFID transponder radiation (RFID transponder responses)
Data Source
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AI summary
RFID method, RFID device for carrying out the RFID method, and computer program product for carrying out a part of the RFID method. The invention relates to an RFID method comprising the following process steps: a) Emitting at least one RFID transmit radiation from an RFID transmitting unit into an RFID transmitting field containing a plurality of RFID transponders, b) Converting the RFID transmit radiation into RFID transponder radiation by at least one RFID transponder, wherein the RFID transponder radiation contains RFID transponder information about the RFID transponder, c) Receiving the RFID transponder radiation by at least one RFID receiving unit, d) Classifying the RFID transponders into RFID transponder groups based on the RFID transponder information of the received RFID transponder radiations, e) Selecting an RFID transponder group representative from at least one of the RFID transponder groups.f) Determining at least one RFID transponder parameter of the RFID transponder group representative, g) Assigning the RFID transponder parameter of the RFID transponder group representative to at least one other member of the RFID transponder group of the RFID transponder group representative. Furthermore, an RFID device for carrying out the RFID process is specified, comprising: - at least one RFID transmitting unit for carrying out step a) of the RFID process, - at least one RFID receiving unit for carrying out step c) of the RFID process, and - at least one RFID evaluation unit for carrying out at least one of steps d) to g) of the RFID process. In addition, a computer program product for carrying out at least one of steps a) to g) of the RFID process is specified.