Patents Assigned to NEC Corporation
  • Publication number: 20180054597
    Abstract: A monitoring system includes a monitored device and a management device for communicating with the monitored device. The monitored device has a signal receiver for causing a signal that includes identification information for identifying a terminal to be received from a terminal present within a predetermined range relative to the monitored device; a terminal distance estimation unit for estimating the distance from the monitored device to the terminal; a terminal direction estimation unit for estimating the direction to the terminal from the monitored device; and a video capturing unit for capturing a predetermined image-image-capturing range on the neighborhood of the monitored device. The management device has a data analysis unit for analyzing the video that has been captured, determining that a predetermined event has occurred, and specifying the terminal distance information, the terminal direction information, and the identification information associated with the point in time of the image capture.
    Type: Application
    Filed: March 22, 2016
    Publication date: February 22, 2018
    Applicant: NEC CORPORATION
    Inventors: Ikuko ARAI, Akio AOYAMA
  • Publication number: 20180054855
    Abstract: A first data center includes a first virtual network that provides a communication service in cooperation with at least a part of a communication facility of a first communication operator and a first communication unit that is operable to communicate with a second data center. The second data center includes a second virtual network that provides a communication service in cooperation with at least a part of a communication facility of a second communication operator and a second communication unit that is operable to communicate with the first data center. The first communication unit is operable to transmit to the second communication unit, communication data to be transmitted from a first terminal connecting to the first virtual network via a communication facility of the first communication operator to a second terminal connecting via a communication facility of the second communication operator to the second virtual network.
    Type: Application
    Filed: March 17, 2016
    Publication date: February 22, 2018
    Applicant: NEC CORPORATION
    Inventors: Shintaro NAKANO, Hideo HASEGAWA, Satoru ISHII
  • Publication number: 20180052726
    Abstract: Accuracy of risks defined for abnormalities that might occur in a system is improved. The risk determination device 100 includes a classification unit 114 and a determination unit 115. The classification unit 114 classifies abnormal patterns 133, each representing a relationship among metrics at a time of abnormality detection in a system, into groups 134 based on a similarity between the abnormal patterns. The determination unit 115 determines, based on the number of abnormal patterns 133 classified into each of the groups 134, likelihood of an abnormality of the corresponding group 134.
    Type: Application
    Filed: March 15, 2016
    Publication date: February 22, 2018
    Applicant: NEC CORPORATION
    Inventors: Shinichiro YOSHIDA, Kentarou YABUKI, Kiyoshi KATO, Hideo HASEGAWA, Hiroyuki MIYAZAKI
  • Publication number: 20180054722
    Abstract: An exemplary object is to provide a communication device that can deliver emergency information to a communication terminal located in a non-3GPP communication area through the non-3GPP communication area. A communication device (10) according to an exemplary embodiment of the present invention is the communication device (10) located in a non-3GPP network (40). The communication device (10) includes an emergency information receiving unit (11) for receiving emergency information delivered from a broadcast server (20) located in a 3GPP network (50), and an emergency information delivery unit (12) for delivering the emergency information to a multicast address as a destination and thereby delivering the emergency information to a communication terminal (30) located in the non-3GPP network (40) and registered to a multicast group associated with the multicast address.
    Type: Application
    Filed: March 8, 2016
    Publication date: February 22, 2018
    Applicant: NEC Corporation
    Inventor: Toshiyuki TAMURA
  • Publication number: 20180052441
    Abstract: Reception means 81 receives an estimator learned using measured data up to a point of time in the past, verification data that is measured data from the point of time onward, and an update rule prescribing whether or not the estimator needs to be updated based on an evaluation index. Simulation means 82 simulates at least one of the evaluation index of the estimator and an update result of the estimator in a predetermined period, based on the update rule and an estimation result calculated by applying the verification data of the predetermined period to the estimator in chronological order.
    Type: Application
    Filed: March 23, 2015
    Publication date: February 22, 2018
    Applicants: NEC CORPORATION, NEC Solution Innovators, Ltd.
    Inventors: Akira TANIMOTO, Yousuke MOTOHASHI, Mamoru IGUCHI
  • Publication number: 20180052804
    Abstract: Provided is a learning model generation system capable of preventing a decrease in prediction accuracy in a case where the trend of an actual value of a prediction target has changed. The learning model generation means 71 generates a learning model using, as learning data, time series data in which a value of each explanatory variable used in prediction of a prediction target is associated with an actual value of the prediction target. The prediction means 72 calculates a predicted value of the prediction target using the learning model once the value of each explanatory variable is given. The change point determination means 73 determines a change point which is a point in time when a trend of the actual value of the prediction target changed.
    Type: Application
    Filed: March 26, 2015
    Publication date: February 22, 2018
    Applicant: NEC CORPORATION
    Inventors: Sawako MIKAMI, Keisuke UMEZU, Yousuke MOTOHASHI
  • Publication number: 20180054271
    Abstract: In order to provide an extended branch device in which construction work is easy and communication is not significantly affected by construction work, and a method for controlling the extended branch device, the extended branch device of the present invention is provided with: a first branch unit provided with a first port coupled to a first terminal station, a second port coupled to a second terminal station, a third port, a fourth port, and a switch for coupling the first port with the second or third port and coupling the second port with the fourth port; and a first separation unit provided with a fifth port coupled to the third port, a sixth port coupled to the fourth port, and a seventh port coupled to a third terminal station, the first separation unit outputting, from the sixth port, an optical signal having a first wavelength among the optical signals inputted from the fifth port, and outputting, from the seventh port, an optical signal having a second wavelength among the optical signals inputted fr
    Type: Application
    Filed: March 9, 2016
    Publication date: February 22, 2018
    Applicant: NEC CORPORATION
    Inventor: Ryota ABE
  • Publication number: 20180052380
    Abstract: In an optical circuit using a Mach-Zehnder-type element, it is difficult to obtain an optical circuit which has a less wavelength dependence and is suitable for achieving high integration. Accordingly, an optical circuit according to the present invention includes: a first Mach-Zehnder-type element including a first branch waveguide, a first branching/combining unit connected to one end of the first branch waveguide, and a second branching/combining unit connected to another end of the first branch waveguide and having a branch configuration different from that of the first branching/combining unit; and a second Mach-Zehnder-type element including a second branch waveguide, a third branching/combining unit connected to one end of the second branch waveguide, and a fourth branching/combining unit connected to another end of the second branch waveguide and having a branch configuration different from that of the third branching/combining unit.
    Type: Application
    Filed: March 22, 2016
    Publication date: February 22, 2018
    Applicant: NEC Corporation
    Inventor: Shigeru NAKAMURA
  • Publication number: 20180050783
    Abstract: Provided is a maneuvering device including: an input device (101) configured to detect an input operation for instructing movement of a mobile body to generate input information, a calculator (11) configured to change the input information so as to acquire an effect equivalent to a case in which a dead zone is set to the input operation, to thereby generate changed input information; and a controller (103) configured to control the movement of the mobile body (100a) based on the changed input information. The calculator is configured to change a range of the dead zone in accordance with a detection parameter detected in relation to the movement of the mobile body.
    Type: Application
    Filed: January 7, 2016
    Publication date: February 22, 2018
    Applicant: NEC Corporation
    Inventor: Hisaya NIIZAWA
  • Publication number: 20180052117
    Abstract: The purpose of the present invention is to accurately detect structures from a remote location without contact while distinguishing between defects such as cracking, separation, and internal cavities.
    Type: Application
    Filed: March 14, 2016
    Publication date: February 22, 2018
    Applicant: NEC Corporation
    Inventor: Hiroshi IMAI
  • Patent number: 9898505
    Abstract: Data set is transformed into a plurality of items of K-bit-long binary data, using, as each of K number hash functions that transforms the data into a binary representation based on a value of projection of the data point on a projection vector. A hash function parameter optimization section finds a hash value, using a continuous valued hash function including, as a variable, the projection of data point on a projection vector, and stores continuous valued learning data for binary transformation, and derives optimized parameter(s) of the hash function that minimizes a cost function, defined based on a distance of the data point and on a distance of the learning data for binary transformation.
    Type: Grant
    Filed: September 26, 2013
    Date of Patent: February 20, 2018
    Assignee: NEC Corporation
    Inventor: Shizuo Sakamoto
  • Patent number: 9900146
    Abstract: An encrypted text matching system includes: an auxiliary data generating unit that generates first and second auxiliary data, which are for verification of matching between a first encrypted text that is obtained by encrypting input data and is registered with a storage device and a second encrypted text that is obtained by encrypting input data to be matched, the verification being performed by using a Hamming distance between plaintexts; and a matching determining unit that performs one-way conversion on at least part of the second auxiliary data, performs one-way conversion on intermediate data that is generated based on a difference between the first encrypted text and the second encrypted text and on the first auxiliary data, and determines whether a Hamming distance between plaintexts is equal to or less than a predetermined value, the Hamming distance corresponding to the difference between the first and second encrypted text.
    Type: Grant
    Filed: April 23, 2014
    Date of Patent: February 20, 2018
    Assignee: NEC CORPORATION
    Inventors: Toshiyuki Isshiki, Kengo Mori, Toshinori Araki
  • Patent number: 9898070
    Abstract: A semiconductor integrated circuit (100) comprising: a plurality of processing circuits (11, 12, 13) each including a notification units for outputting a notification signal according to the processing state of the own processing circuit; a plurality of power supply switch units (SW1, SW2, SW3) for switching the connection states between the respective processing circuits and a power supply source; a power supply switch control circuit which is connected with the notification means (111, 121, 131), stores power supply control information (101) including a plurality of connection statuses, and controls the connection states on the basis of the notification signals and the power supply control information; and a data bus (BS) and the like connecting each of the processing circuits and the power supply switch control circuit, wherein: at least two or more of the plurality of processing circuits update the power supply control information via the data bus and the like before outputting a notification signal; and
    Type: Grant
    Filed: January 7, 2014
    Date of Patent: February 20, 2018
    Assignee: NEC CORPORATION
    Inventors: Yukihide Tsuji, Noboru Sakimura, Ryusuke Nebashi, Ayuka Tada
  • Patent number: 9897755
    Abstract: An optical waveguide device includes first and second branching devices and first to fourth distribution optical waveguides that are formed on an optical waveguide substrate including a latticed dummy pattern of a predetermined pitch and that are arranged, in a region where the dummy pattern is removed, so as to be separated from the dummy pattern, and an interval between the first and second distribution optical waveguides at an output point of the first branching device is equal to an interval between the third and fourth distribution optical waveguides at an output point of the second branching device, and a distance between light propagation centers of the first and second branching devices is an integer multiple of the pitch, and at a point where a distance between neighboring distribution optical waveguides becomes maximum, the distance between the neighboring distribution optical waveguides is an integer multiple of the pitch.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: February 20, 2018
    Assignee: NEC CORPORATION
    Inventor: Morio Takahashi
  • Patent number: 9898525
    Abstract: An information processing device includes: a unit configured to compute a service influence degree for each risk factor with respect to each service, on the basis of information which indicates a relation between components which have the risk factors and other components which are influenced by the state of the components, information which denotes characteristics of the respective risk factors, and information which denotes a correspondence between the services and these components; and a unit configured to compute, on the basis of the computed service influence degrees, similarities between specific risk factors and other risk factors, and for generating and outputting a set of component identification information on the basis of the computed similarities.
    Type: Grant
    Filed: December 16, 2013
    Date of Patent: February 20, 2018
    Assignee: NEC CORPORATION
    Inventor: Yoshiharu Maeno
  • Patent number: 9900249
    Abstract: A packet forwarding node includes a storage unit to store a packet forwarding table used for forwarding a packet based on an identifier which identifies a link between nodes on a packet forwarding path and a forwarding unit to receive an incoming packet including a plurality of the identifiers, and to forward the incoming packet based on an identifier corresponding to the packet forwarding node.
    Type: Grant
    Filed: April 3, 2014
    Date of Patent: February 20, 2018
    Assignee: NEC Corporation
    Inventor: Jun Awano
  • Patent number: 9899799
    Abstract: Provided are: an optical waveguide that relatively easily expands a spot size and that can suppress an increase in optical coupling loss with another optical waveguide element; and an optical component and variable-wavelength laser that use the optical waveguide. The optical waveguide is provided with: a cladding member; and a core layer that is disposed within the cladding member and that is formed as an elongated body having a rectangular cross-sectional shape from a material having a higher refractive index than the material configuring the cladding member. Here, the cross-sectional shape of the core layer is characterized in having a rectangular shape in which the length in the lateral direction is at least 10 times the length in the vertical direction.
    Type: Grant
    Filed: February 26, 2015
    Date of Patent: February 20, 2018
    Assignee: NEC CORPORATION
    Inventors: Naoki Kobayashi, Kenji Sato
  • Patent number: 9898632
    Abstract: An article management system includes RFID tags (102) fixed above a reader waveguide (101), a tag position table storage unit (106) that stores tag information and fixed positions of the RFID tags (102) in association with each other, an article position table storage unit (105) that stores identification information and an assigned position of an article (108) in association with each other, an article management table storage unit (107) that stores the identification information of the article (108) and the tag information of the RFID tags (102) in association with each other, a tag reading unit (103) that reads the RFID tags (102) by electromagnetic coupling through the reader waveguide (101), and an article presence/absence determination unit that determines presence or absence of placement of the article (108) corresponding to the RFID tags (102) based on results of reading the RFID tags (102).
    Type: Grant
    Filed: April 15, 2014
    Date of Patent: February 20, 2018
    Assignee: NEC CORPORATION
    Inventor: Wataru Hattori
  • Patent number: 9900187
    Abstract: A wireless communication system is provided.
    Type: Grant
    Filed: February 23, 2015
    Date of Patent: February 20, 2018
    Assignee: NEC CORPORATION
    Inventor: Ichiro Tsujimoto
  • Patent number: 9900818
    Abstract: When a representative PS server receives a P-TMSI contained in a PDP context succession request signal from a UE according to a handover communication procedure prescribed in an applicable standard after the UE moves, if the PS server identified with the identification information contained in the received P-TMSI is not its own representative PS server, the representative PS server identifies the PS server identified with the identification information as a PS server that manages a femtocell base station to which the UE belonged before it moved and forwards the PDP context succession request signal to the identified PS server.
    Type: Grant
    Filed: August 28, 2012
    Date of Patent: February 20, 2018
    Assignee: NEC Corporation
    Inventors: Yusuke Miyagawa, Takayuki Kido, Takuo Akimoto, Yuki Nakanishi, Osamu Kurokawa, Yasuhiro Watanabe