RFID Tag Universal Data Block for Efficient Signal Exchange
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Solution Overview
Problem
Existing RFID tracking systems require significant interaction between tags and readers for data transfer, leading to inefficiencies and increased errors due to the need for multiple signal exchanges for each data item, especially in noisy environments.
Innovation Solution
The system introduces a universal data block (UDB) format that allows the reader to request multiple data items at once, enabling the tag to transmit a single data block containing several items, and employs error control fields like cyclic redundancy codes to ensure reliable transmission, optimizing data transfer efficiency and reducing errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple signal exchanges are used for each data item transfer between tag and reader, then data transfer completeness can be ensured, but data transfer efficiency decreases and error probability increases
Solution Approach 1:
The patent combines multiple data items into a single data block structure that is transmitted in one signal exchange. Instead of sending individual data items separately through multiple interactions, the system packages multiple items (such as identification data, sensor data, location data) into one unified block, thereby reducing the number of signal exchanges while maintaining data transfer reliability
Solution Approach 2:
The tag performs preliminary actions by preparing and buffering multiple data items in advance within a structured data block before transmission. This preliminary organization of data allows the reader to receive comprehensive information in a single exchange rather than requiring multiple sequential requests and responses
2Measurement precision
If multiple signal exchanges are used for each data item transfer, then data accuracy can be verified through repeated interactions, but error probability increases due to more transmission opportunities
Solution Approach 1:
The patent implements a feedback mechanism where the reader sends an acknowledgment signal after receiving the data block, and the tag can request retransmission of specific corrupted items. This targeted feedback approach verifies data accuracy without requiring multiple complete signal exchanges, reducing overall error probability while maintaining transmission reliability
Solution Approach 2:
Instead of requiring complete retransmission of the entire data block for any error, the system employs partial retransmission where only the specific corrupted data items are re-sent. This partial action approach maintains data accuracy verification while minimizing the number of transmission opportunities that could introduce additional errors
3Productivity
If a universal data block format is implemented to transfer multiple data items at once, then data transfer efficiency improves, but device complexity increases
Solution Approach 1:
The universal data block is segmented into distinct fields and structures, each handling specific types of data items (identification fields, sensor data fields, location fields). This segmentation allows for systematic organization and processing of multiple data items within the single block, managing complexity through structured division rather than monolithic design
Solution Approach 2:
The patent creates a universal data block format that can accommodate multiple types of data items through a standardized structure. This multi-functional format serves various purposes (identification, sensing, location tracking) within a single unified framework, improving efficiency while containing complexity through standardization rather than requiring separate structures for each data type
Data Source
AI summary
A tag has circuitry that can transmit and receive wireless signals, including receipt of first and second wireless signals that are different. The circuitry responds to a predetermined event by inhibiting wireless transmissions for up to a selected time interval, while waiting for receipt of one of the first and second wireless signals. The circuitry responds to receipt during the selected time interval of one of the second wireless signals before receipt of one of the first wireless signals by continuing to inhibit wireless transmissions, and responds to expiration of the selected time interval without receipt of either of the first and second wireless signals by transmitting a selected wireless signal.