RFID Reader Dynamic Frame Allocation for Tag Recognition
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Solution Overview
Problem
Computational RFID (CRFID) tags face inefficiencies in transmitting information due to the need for additional electromagnetic energy for sensing operations and processing delays, leading to resource wastage and collision issues in existing recognition methods.
Innovation Solution
The proposed RFID system employs a reader that operates in two modes: tag information collection and tag recognition, where frame lengths are determined based on the number of tags and their operation cycles, allowing for efficient data transmission and minimizing resource wastage by optimizing frame sizes and marginal sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If frame length is fixed in existing RFID recognition methods, then system operation is simple, but resource wastage occurs due to mismatch between frame size and actual number of operating tags
Solution Approach 1:
The patent implements dynamic frame length adjustment based on the actual number of operating tags. The reader determines frame length adaptively in each frame based on tag operation cycles and current tag count, transforming the static frame structure into a dynamic one that optimizes resource utilization while maintaining manageable complexity through automated determination algorithms.
Solution Approach 2:
The patent changes the frame length parameter dynamically based on the number of operating tags and their operation cycles. By adjusting this key parameter adaptively rather than keeping it fixed, the system reduces electromagnetic energy wastage while the automated determination process keeps the operational complexity manageable.
2Reliability
If additional electromagnetic energy is provided for sensing operations in CRFID tags, then sensing capability is enabled, but data transmission efficiency deteriorates due to processing delays and collision issues
Solution Approach 1:
The patent incorporates a marginal section before the time slot where tags perform sensing operations and prepare data in advance. This preliminary action allows tags to complete sensing and data preparation before the actual transmission slot begins, reducing transmission delays and improving reliability by ensuring data readiness before transmission.
Solution Approach 2:
The patent divides the frame into distinct sections: a marginal section for sensing and data preparation, and a time slot for transmission. This segmentation allows sensing operations to occur separately from transmission, reducing conflicts and delays while maintaining reliable data transmission.
3Productivity
If frame size is increased to accommodate all tags, then all tags can be recognized, but resource wastage increases due to empty slots when fewer tags are operating
Solution Approach 1:
The patent dynamically adjusts frame length to match the actual number of operating tags in each frame. By making the frame size adaptive rather than fixed, the system maintains high tag recognition throughput when needed while minimizing electromagnetic energy consumption by reducing frame size when fewer tags are active, thus resolving the contradiction between productivity and energy loss.
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
This approach enhances the tag recognition ratio and reduces data transmission delays by aligning frame sizes with the number of operating tags, improving overall efficiency and resource utilization in CRFID systems.
Implementation Method 1
a reader in a radio frequency identification (RFID) system, includes a processor configured to receive tag information and a sensing data packet from a plurality of tags
Data Source
AI summary
Disclosed herein is an operating method of a reader in a radio frequency identification (RFID) system. In the method, a reader operates in a tag information collection mode in which tag information is collected from a plurality of tags and a tag recognition mode in which a frame of a predetermined size calculated according to the number of tags operating in each frame is allocated based on the tag information and at least some of the plurality of tags are recognized.