# US 12,119,964 B2 · Electronic control device and determination method

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- Number: US 12,119,964 B2
- Document ID: US12119964B2
- Status: Granted
- Kind: B2
- Application number: 18/009,458
- Filed: 2021-02-26
- Published: 2023-07-27
- Granted: 2024-10-15
- Earliest claimed: 2020-06-17
- Assignees: Hitachi Astemo, Ltd.
- Applicants: Hitachi Astemo, Ltd.
- Inventors: Yasuhiro Ikeda; Yutaka Uematsu; Hideyuki Sakamoto
- Web page: https://patentgrep.com/patent/US12119964B2

## CPC

- H04L 25/03878: {Line equalisers; line build-out devices}
- H04B 3/04: Control of transmission; Equalising
- H04B 3/46: Monitoring; Testing
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04B: TRANSMISSION

## Abstract

An electronic control device includes a receiving unit that receives a data signal from an external device via a transmission line, a determination criterion selection unit that determines a determination criterion based on transition information of a waveform in the data signal, and a condition determination unit that determines a condition of a communication system including the external device, the receiving unit, and the transmission line based on a transmission waveform characteristic in the data signal and the determination criterion.

## Claims

### Claim 1

An electronic control device comprising:
a receiving unit that receives a data signal from an external device via a transmission line;
a transmission characteristic extraction unit that uses an eye pattern at a first sampling number N1 and an eye pattern at a second sampling number N2 to estimate a characteristic of an eye pattern at a third sampling number N3 and calculate transition information of a waveform, wherein N3 is greater than N1 and N2;
a determination criterion selection unit that determines a determination criterion based on the transition information of the waveform in the data signal; and
a condition determination unit that determines a condition of a communication system including the external device, the receiving unit, and the transmission line based on a transmission waveform characteristic in the data signal and the determination criterion.

### Claim 2 (depends on 1)

The electronic control device according to claim 1, wherein
the transmission waveform characteristic in the data signal is a waveform adjustment setting value of an equalizer or pre-emphasis that adjusts a waveform of the data signal, and
the condition determination unit determines a condition of a communication unit based on the transmission waveform characteristic and the determination criterion.

### Claim 3 (depends on 1)

The electronic control device according to claim 1, further comprising
a recording unit that stores log data of the transmission waveform characteristic related to the data signal.

### Claim 4 (depends on 1)

The electronic control device according to claim 1, wherein
the determination criterion selection unit determines the determination criterion based on power supply voltages and temperature information of the external device and the electronic control device.

### Claim 5 (depends on 1)

The electronic control device according to claim 1, further comprising:
a second receiving unit that receives a second data signal from a second external device via a second transmission line;
a second determination criterion selection unit that determines a second determination criterion based on transition information of a waveform in the second data signal; and
a second condition determination unit that determines a condition of a second communication system including the second external device, the second receiving unit, and the second transmission line based on a transmission waveform characteristic in the second data signal and the second determination criterion.

### Claim 6

A determination method performed by a computer including a receiving unit that receives a data signal from an external device via a transmission line, the determination method comprising:
using an eye pattern at a first sampling number N1 and an eye pattern at a second sampling number N2 to estimate a characteristic of an eye pattern at a third sampling number N3 and calculate transition information of a waveform, wherein N3 is greater than N1 and N2;
determining a determination criterion based on the transition information of the waveform in the data signal; and
determining a condition of a communication system including the external device, the receiving unit, and the transmission line based on a transmission waveform characteristic in the data signal and the determination criterion.

### Claim 7

An electronic control device comprising:
a receiver that receives a data signal from an external device via a transmission line; and
a controller configured to
determine a determination criterion based on transition information of a waveform in the data signal, and based on power supply voltages and temperature information of each of the external device and the electronic control device; and
determine a condition of a communication system including the external device, the receiver, and the transmission line based on a transmission waveform characteristic in the data signal and the determination criterion.