Abstract: A network management apparatus according to an embodiment includes a storage device configured to store information indicating connection relationships between a plurality of communication devices and communication paths in a network configuration and rank information indicating ranks of the plurality of communication devices in the network configuration and a determination unit configured to, when a fault has occurred in a communication device, determine that a communication device influenced by the fault is within a fault influence range based on the information stored in the storage device.
Type:
Application
Filed:
February 21, 2020
Publication date:
March 30, 2023
Applicant:
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Abstract: A level estimation apparatus includes processing circuitry configured to receive event logs of events detected by a device or software, and calculate degrees of similarity among the events indicated by the event logs with use of the event logs, and estimate a level of a predetermined event based on the calculated degrees of similarity among the events and a level of at least one of the events, wherein in the calculation of the degrees of similarity among the events, when a degree of similarity between events detected by different devices or items of software is calculated, a degree of similarity to a common event is used, the common event being an event that has been detected mutually by the different devices or items of software.
Type:
Application
Filed:
October 9, 2019
Publication date:
March 30, 2023
Applicant:
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Abstract: A wavelength multiplexing communication system includes a master station apparatus and a plurality of slave station apparatuses. The master station apparatus includes a wavelength multiplexing communication unit. The wavelength multiplexing communication unit performs wavelength multiplexing communication with the plurality of slave station apparatuses by using optical signals having the number of wavelengths equal to or less than the number of the plurality of slave station apparatuses. The slave station apparatus includes an optical communication unit. When the main signal communication is performed in the host slave station apparatus, the optical communication unit communicates with the master station apparatus by an optical signal having the same wavelength as a wavelength used by another slave station apparatus in which a main signal notification is not performed.
Type:
Application
Filed:
March 2, 2020
Publication date:
March 30, 2023
Applicant:
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventors:
Rintaro HARADA, Hirotaka UJIKAWA, Shin KANEKO, Jun TERADA
Abstract: According to an information processing method of associating a plurality of base stations serving as transmission sources with pieces of information of beacons in a one-to-one manner, the beacons being transmitted by the plurality of base stations in an environment in which cells of the plurality of base stations overlap each other and measured at a plurality of measurement locations, the method includes performing first processing of associating an MAC address and a signal intensity of a beacon transmitted by one or more of the base stations with each of the measurement locations, performing second processing of associating, as a transmission source candidate of the beacon, one or more of the base stations located around each of the measurement locations that have undergone the first processing with the measurement location in ascending order of distance to the measurement location, performing third processing of associating one of the base stations closest to each of the measurement locations as a transmiss
Type:
Application
Filed:
March 17, 2020
Publication date:
March 30, 2023
Applicant:
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Abstract: A public value 2?/m is obtained, and secure computation of public value division [x]/(2?/m) using a secret share value [x] and the obtained public value 2?/m is performed, so that a secret share value [mx]r of a value obtained by right-shifting mx by ? bits is obtained and output. Here, x is a real number, [•] is a secret share value of •, ? is a positive integer that is the number of bits indicating a right shifting amount, and m is a real number.
Type:
Application
Filed:
January 20, 2020
Publication date:
March 30, 2023
Applicant:
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Abstract: An object-specific keypoint separation apparatus includes: an inference execution unit configured to receive a captured image capturing an object as an input and use a pre-trained model that has been trained in order to output a plurality of first maps and a plurality of second maps generated from the input captured image to output the plurality of first maps and the plurality of second maps, the plurality of first maps storing, for keypoints of the object. a distance from a first keypoint only around a second keypoint, and the plurality of second maps representing a heat map configured to have a peak at coordinates at which the keypoint of the object appears; and an object-specific keypoint separation unit configured to separate the keypoints for each object based on the plurality of first maps and the plurality of second maps output from the inference execution unit.
Type:
Application
Filed:
February 20, 2020
Publication date:
March 30, 2023
Applicant:
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Abstract: An object of the present disclosure is to provide a communication system and a terminal capable of predicting future communication quality to respond to change in communication quality due to environmental fluctuation.
Type:
Application
Filed:
February 25, 2020
Publication date:
March 30, 2023
Applicant:
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Abstract: An optical multiplexing and demultiplexing method of the present disclosure includes arranging, face to face, a polished surface of a coated optical fiber whose side surface is polished to a core or a vicinity of the core and a polished surface of an optical waveguide whose propagation constant varies in a longitudinal direction and whose side surface is polished to a core or a vicinity of the core, and aligning the polished surface of the coated optical fiber and the polished surface of the optical waveguide so that desired branching ratio is obtained from one end of the coated optical fiber to the end, distal to the former end, of the optical waveguide by relatively moving the polished surface of the coated optical fiber and the polished surface of the optical waveguide.
Type:
Application
Filed:
February 21, 2020
Publication date:
March 30, 2023
Applicant:
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Abstract: An optical buffer unit includes a plurality of delay line units each of which gives a delay to optical signals, and a switch that receives an optical signal output from one of the delay line units, includes a first output for outputting the optical signal to a next one of the delay line units and a second output for outputting the optical signal to another apparatus, and outputs the optical signal from the first output or the second output.
Type:
Application
Filed:
June 10, 2020
Publication date:
March 30, 2023
Applicants:
NIPPON TELEGRAPH AND TELEPHONE CORPORATION, NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Abstract: A tentative decision is made for symbols on the basis of a received signal and a decision threshold, and a tentative decision signal including a sequence of the symbols is output. A scale value indicating a rate of increase or reduction of the received signal or a threshold change rate indicating a degree of change in the decision threshold is updated so that an appearance frequency of each of symbols included in the tentative decision signal matches an appearance frequency of each of symbols in a reference signal obtained by modulating a transmitted signal with a modulation method used in transmission which is shared between a transmitting side and a receiving side, and an SN ratio is calculated using the scale value or the threshold change rate when a degree of agreement between the appearance frequencies is within a predetermined permissible range.
Type:
Application
Filed:
October 9, 2019
Publication date:
March 30, 2023
Applicant:
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Abstract: The present invention achieves automation of validation of a catalog created by a cooperative service catalog creator through a GUI. A catalog verification device 60 is a catalog verification device 60 that verifies the catalog created by the catalog creation assistance system that assists creation of the catalog used in the orchestrator 50.
Type:
Grant
Filed:
January 29, 2020
Date of Patent:
March 28, 2023
Assignee:
Nippon Telegraph and Telephone Corporation
Abstract: In a classifier whose classification accuracy is maintained without frequently collecting labeled learning data, a learning unit learns a classification criterion of a classifier at each time point in the past until the present and learns a time series change of the classification criterion by using data for learning to which a label is given and that is collected until the present. A classifier creating unit predicts a classification criterion of a future classifier and creates a classifier that outputs a label representing an attribute of input data by using the learned classification criterion and time series change.
Type:
Grant
Filed:
January 19, 2017
Date of Patent:
March 28, 2023
Assignee:
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Abstract: Low-dimensional feature values with which semantic factors of content are ascertained are generated from relevance between sets of two types of content. Based on a relation indicator indicating a pair of groups indicating which groups are related to first types of content groups among second types of content groups, an initial feature value extracting unit 11 extracts initial feature values of the first type of content and the second type of content. A content pair selecting unit 12 selects a content pair by selecting one first type of content and one second type of content from each pair of groups indicated by the relation indicator. A feature value conversion function generating unit 13 generates feature conversion functions 31 of converting the initial feature values into low-dimensional feature values based on the content pair selected from each pair of groups.
Type:
Grant
Filed:
July 8, 2019
Date of Patent:
March 28, 2023
Assignee:
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventors:
Go Irie, Kaoru Hiramatsu, Kunio Kashino, Kiyoharu Aizawa
Abstract: A signal retrieval device includes a modification unit and a signal retrieval unit. The modification unit modifies a value of an attribute of a target represented by an input signal or a stored signals stored in a signal storage unit or a value of an attribute relating to a signal generation source of the input signal to acquire a plurality of modified values of the attribute. The signal retrieval unit retrieves a stored signal of the stored signals similar to the input signal using the input signal or the stored signals in which the attribute is modified according to each of the plurality of modified values of the attribute acquired by the modification unit.
Type:
Grant
Filed:
May 1, 2018
Date of Patent:
March 28, 2023
Assignee:
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Abstract: A software deployment method includes: analyzing a source code of an application; designating off-loadable processes of the application; performing a code conversion of the application according to a deployment destination environment; measuring the performance of the converted application on a verification device; making a setting for resource amounts according to the deployment destination environment; selecting a deployment place by calculating a deployment destination on the basis of a performance and a cost when the converted application is deployed while ensuring the resource amounts; performing, after deployment to an actual environment, a performance measurement test process to measure an actual performance of application; and performing, after performing the performance measurement test process, one or more of performing the code conversion, making the setting for resource amounts, selecting the deployment place, measuring the performance of the application on the verification device, and performing
Type:
Grant
Filed:
February 21, 2020
Date of Patent:
March 28, 2023
Assignee:
Nippon Telegraph and Telephone Corporation
Abstract: A transfer device for coupling a priority signal and a standard signal and transferring the signal includes a reception unit that receives a plurality of signals transmitted from a device connected to an opposite side of a transfer route, a separation unit that separates the signal into the priority signal and the standard signal, a signal defragmentation unit that defragments the plurality of standard signals, a multiplexing unit that multiplexes each of the priority signal and the standard signal, a priority control unit that determines a transfer order of the signals, a header information copy unit that copy header information of the standard signal, a transmission unit that transmits the signal to a device connected to the transfer route, an interrupt transfer processing unit that perform an interruption process when the priority signal arrives during the transfer of the standard signal, a signal fragmentation unit that fragments the standard signal, a header information assignment unit that assigns the h
Type:
Grant
Filed:
February 1, 2019
Date of Patent:
March 28, 2023
Assignee:
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Abstract: An anomaly detection apparatus having a function of an autoencoder that includes an input layer, hidden layers, and an output layer, and that learns parameters such that data of the input layer is reproduced in the output layer, the anomaly detection apparatus including: input means that input normal data of a plurality of types; learning means that learn parameters such that normal data of the input layer is reproduced in the output layer by learning a feature across data types using data of a dimension which is smaller than a dimension of the normal data; and anomaly degree calculation means that input test data to the autoencoder using the parameters learned by the learning means, and calculate anomaly degree of the test data based on output data of the autoencoder and the test data.
Type:
Grant
Filed:
October 26, 2018
Date of Patent:
March 28, 2023
Assignee:
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Abstract: A communication control apparatus includes a communication parameter acquisition unit that acquires at least one second communication parameter that is a candidate for a first communication parameter indicating a communication parameter to be assigned to a communication apparatus and indicates a communication parameter suitable for regional characteristics indicating a communication environment in a region where the communication apparatus is installed, a setting file storage unit that stores a setting file corresponding to each second communication parameter, a setting file acquisition control unit that acquires the setting file and stores the acquired setting file in the setting file storage unit, and a communication parameter assignment unit that determines the first communication parameter from among the second communication parameters acquired by the communication parameter acquisition unit and assigns the determined first communication parameter to the communication apparatus.
Type:
Grant
Filed:
April 4, 2019
Date of Patent:
March 28, 2023
Assignee:
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Abstract: A signal processing device applies a convolutional separation filter, which is a combined filter of: a rear reverberation removal filter for suppressing a rear reverberation component from a mixed acoustic signal obtained by converting an observed mixed acoustic signal obtained by observing a source signal into a time-frequency domain; and a sound source separation filter for emphasizing components corresponding to source signals from the mixed acoustic signal, to a mixed acoustic signal string including the mixed acoustic signal and a delay signal of the mixed acoustic signal and estimates model parameters of a model for obtaining information corresponding to signals in which the rear reverberation component is suppressed and target signals emitted from target sound sources in the source signal are emphasized.
Type:
Application
Filed:
February 26, 2020
Publication date:
March 23, 2023
Applicant:
NIPPON TELEGRAPH AND TELEPHONE CORPORATION