Transceiver Node Identification via Resistor Voltage Difference

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Solution Overview

Problem

Existing methods for identifying nodes in a communication network, such as those in automobiles, struggle to discern minute differences in signaling deviations without expensive equipment, leading to potential false positives and accuracy issues due to noise.

Innovation Solution

A communication network utilizing a voltage difference between wires to identify nodes, where each transceiver includes a resistor that distributes a portion of the power supply voltage, allowing for the differentiation of transceivers based on voltage differences without requiring expensive equipment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If low-cost equipment is used to analyze signaling deviation, then cost is reduced, but measurement precision deteriorates due to inability to discern minute differences

Engineering Contradiction:

ImprovecostVSAvoidsignaling deviation detection accuracy

Core Design Contradiction:

Ease of manufactureVSMeasurement precision

Solution Approach 1:

The patent changes the parameter being measured from signaling deviation to voltage difference. By using different resistance values in transceivers, each transceiver produces a distinct voltage difference when outputting the same signal. This voltage difference parameter is easier to measure with low-cost equipment while still providing unique identification for each transceiver, thus resolving the contradiction between cost and measurement precision.

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If expensive separate equipment is used to discern minute differences of signaling deviations, then measurement precision is improved, but device complexity increases

Engineering Contradiction:

Improvesignaling deviation detection accuracyVSAvoidequipment complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent extracts the identification information from the signaling deviation analysis and embeds it directly into the transceiver's electrical characteristics through different resistance values. This allows the identification function to be taken out from complex external analysis equipment and integrated into the transceiver itself, enabling simple voltage difference measurement with standard equipment while maintaining high measurement precision.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Instead of using expensive equipment to analyze and copy the subtle signaling deviation characteristics, the patent creates a simplified copy of the identification information by encoding it into the voltage difference produced by different resistance values. This copied identification method can be detected by simple, low-cost equipment while maintaining the ability to uniquely identify each transceiver.

Inventive Principle:

Principle #26Copying

3Device complexity

If signaling deviation analysis is performed without unique transceiver characteristics, then device complexity is reduced, but reliability deteriorates due to false positive detection

Engineering Contradiction:

Improveidentification system complexityVSAvoidnode identification accuracy

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent applies local quality by giving each transceiver a unique local characteristic through different resistance values. This local difference in resistance creates a distinct voltage difference signature for each transceiver, enabling reliable identification. The simplicity of the overall system is maintained while reliability is improved through this localized differentiation approach.

Inventive Principle:

Principle #3Local quality

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 enables accurate identification of nodes and detection of potentially malicious ECUs without the need for costly equipment, improving reliability and reducing noise-related inaccuracies.

Implementation Method 1

a first transceiver connected to the wires and including a first resistor across which a portion of a first power supply voltage is distributed

Methodology Applied

Scientific EffectVoltage distribution through resistor: Ohm's Law

Data Source

PatentUS20250168036A1Communication network, and method and device for identifying node connected thereto

Publication Date: 2025.05.22 IND ACADEMIC COOP FOUND YONSEI UNIV

AI summary

A communication network, and a method and device for identifying a node connected to the communication network are disclosed.According to an embodiment of the present disclosure, there is provided a communication network which performs communication using a voltage difference between wires constituting a communication bus, the communication network including: the wires; a first transceiver connected to the wires and including a first resistor across which a portion of a first power supply voltage is distributed; and a second transceiver connected to the wires and including a second resistor across which a portion of a second power supply voltage is distributed, wherein the first resistor has a different value from the second resistor.