US 10623095

A concise summary of US Patent 10,623,095 is as follows:

Title: Signal detection device and signal detection method

Assignee: As of the latest assignment recorded on October 1, 2025, the assignee for US Patent 10,623,095 is RADIANT PATENTS LLC. The original assignee was NEC Corp.

Inventor: Yoshirou Satou

Filing Date: October 30, 2018

Issue Date: April 14, 2020

Abstract:
The patent describes a signal detection device featuring a comparison unit and an alarm generator. The comparison unit acquires data including the central frequencies of optical signals from multiple transmitters, the interval between these frequencies, and power measurement values of a wavelength-division multiplexed (WDM) signal. This power is measured at specific sampling point frequencies. The unit then selects a power value based on the central frequency interval and the sampling interval and compares it to a predetermined threshold. If the selected value is below the threshold, the alarm generator issues a signal interruption alarm.

Plain-Language Overview of Independent Claims:

As of April 26, 2026, a review of the dockets for the U.S. Court of Appeals for the Federal Circuit (CAFC) for the year 2026 shows no litigation concerning US Patent 10,623,095.

Independent Claim 1:
This claim protects an optical signal monitoring device. The device includes an optical channel monitor that measures the intensity of a combined optical signal at regular intervals. This combined signal is made up of at least two different optical signals, each with its own frequency width. A controller within the device is configured to identify which measurement points correspond to each of the different optical signals and then to separate the intensity values for each signal based on these identified points.

Independent Claim 6:
This claim also covers an optical signal monitoring apparatus. It has an optical channel monitor to measure the intensity of a multiplexed signal, which contains at least a first and a second optical signal with different frequency widths. A controller identifies the intensity values for the first and second signals from the measurements. It then determines the power of the first optical channel based on its identified intensity values and sends out an alert if this power is below a certain level.

Independent Claim 12:
This claim outlines a method for monitoring optical signals. The method involves measuring multiple optical intensity values of a combined signal at a set sampling interval. This signal includes a first and a second optical signal, each having a different frequency width. The next step is to identify the specific sampling points that correspond to the first and second optical signals. Finally, the method involves identifying the intensity values for each of the two signals from the measurements, based on their respective sampling points.

Independent Claim 18:
This claim pertains to a non-transitory computer-readable recording medium that has a program stored on it. When this program is run by the processor of an optical signal monitoring apparatus, it causes the apparatus to perform a specific method. This method includes measuring the optical intensity of a multiplexed signal at a sampling interval, where the signal contains at least two optical signals with different frequency widths. The method then identifies the sampling points corresponding to each signal and, based on these points, identifies the respective intensity values for each signal from the collected measurements.