RFID Tag Universal Data Block Transmission

Solution Overview

Problem

Existing RFID tracking systems require significant interaction between tags and readers for data transfer, leading to inefficiencies and increased error rates 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 readers 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 improve signal reliability and reduce errors.

Engineering Contradictions & Design Principles

VSEngineering 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 deteriorates and error rate increases

Engineering Contradiction:

Improvedata transfer reliabilityVSAvoiddata transfer efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent combines multiple data items into a single data block structure that can be transmitted in one signal exchange. The data block contains multiple data fields (e.g., data field 1, data field 2, data field 3) along with error control fields, allowing the reader to request and the tag to transmit several data items simultaneously rather than exchanging signals for each item separately.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent implements preliminary error detection and correction by incorporating error control fields (such as cyclic redundancy check fields) into the data block structure before transmission. This allows error detection and correction to be performed in advance during the same signal exchange, rather than requiring additional back-and-forth signal exchanges to handle errors.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If multiple signal exchanges are used for data transfer, then error detection and correction can be performed, but the number of interactions increases leading to higher error rates in noisy environments

Engineering Contradiction:

Improveerror detection and correction capabilityVSAvoidenvironmental noise impact

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent implements preliminary error detection and correction by incorporating error control fields (such as cyclic redundancy check fields) into the data block structure before transmission. This allows error detection and correction to be performed in advance during the same signal exchange, rather than requiring additional back-and-forth signal exchanges to handle errors.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent converts the potential harm of environmental noise into a manageable issue by embedding error control mechanisms within the data block itself. The error control fields are designed to detect and correct errors caused by noisy environments, transforming the harmful effect of noise into a controlled parameter that can be handled within the same transmission cycle.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Measurement precision

If traditional RFID communication protocol is used with multiple interactions, then data accuracy can be maintained, but communication time and energy consumption increase

Engineering Contradiction:

Improvedata accuracyVSAvoidcommunication time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent combines multiple data items into a single data block structure that can be transmitted in one signal exchange. The data block contains multiple data fields (e.g., data field 1, data field 2, data field 3) along with error control fields, allowing the reader to request and the tag to transmit several data items simultaneously rather than exchanging signals for each item separately.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent implements preliminary error detection and correction by incorporating error control fields (such as cyclic redundancy check fields) into the data block structure before transmission. This allows error detection and correction to be performed in advance during the same signal exchange, rather than requiring additional back-and-forth signal exchanges to handle errors.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS7434731B2Method and apparatus for efficient data transmission from a tag

Publication Date: 2008.10.14 SAVI TECH INC

AI summary

A tag has circuitry with a communication portion that can transmit and receive wireless signals, including wireless transmission of data blocks that each have a predefined configuration with a plurality of data slots. The circuitry includes a further portion that, in response to receipt through the communication portion of a wireless communication containing a request identifying a set of plural data items, populates respective data slots in one data block with respective data items from the set, and then causes the communication portion to effect wireless transmission of that data block.