公开(公告)号：US20240338269A1

公开(公告)日：2024-10-10

申请号：US18576847

申请日：2021-08-10

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Kengo NAKAMURA ,  Takeru INOUE ,  Masaaki NISHINO ,  Norihito YASUDA

IPC: G06F11/00

CPC classification number: G06F11/008

Abstract: A reliability calculation method according to one embodiment, executed by a computer, includes an input procedure designed to input a connected undirected graph G=(V, E), an operation probability pi of a link ei∈E that constitutes the undirected graph G, and a predetermined set T⊏V of k-1 source nodes; a search procedure designed to generate a directed acyclic graph for calculating a reliability RG,p (T␣{v}) representing the probability that each target node v∈V\T is connected to each of the k-1 source nodes, based on the undirected graph G, the operation probability of operation pi, and the set T; and a probability calculation procedure designed to calculate the reliability RG,p (T␣{v}) for each target node v based on the directed acyclic graph and a correspondence between each vertex of the directed acyclic graph and its adjacent vertex.

公开(公告)号：US20220159512A1

公开(公告)日：2022-05-19

申请号：US17604052

申请日：2019-04-26

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Riichi KUDO ,  Takeru INOUE ,  Atsushi TANIGUCHI ,  Kohei MIZUNO

IPC: H04W28/08 ,  H04W28/18

Abstract: An event regarding control of a terminal that significantly affects communication quality with which communication between between the terminal and an external communication device is performed is predicted by acquiring surrounding information of the terminal using a surrounding environment information collection unit, and a packet loss caused in communication, communication disconnection, and communication quality that does not meet required performance are prevented using communication control to change setting related to communication, such as selection/addition/deletion of a communication counterpart, selection/change of a communication scheme, a change in modulation scheme, coding rate, and number of spatial multiplexings of communication, and a change in setting of an automatic gain controller of a receiver for communication.

公开(公告)号：US20180026862A1

公开(公告)日：2018-01-25

申请号：US15550966

申请日：2016-02-16

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Akihiro SHIMODA ,  Keisuke ISHIBASHI ,  Takeru INOUE ,  Kazumichi SATO ,  Tatsuya MORI ,  Shigeki GOTO

IPC: H04L12/26 ,  H04L29/12

Abstract: An estimation device measures a number of DNS requests for each domain name and for each IP address in observed flows, measures a total number of the flows, and total amounts of data; estimates a relationship between the amount of data for each IP address corresponding to a node, and the number of DNS requests for each domain name corresponding to a non-intermediate node; and based on a value obtained by multiplying the number of requests for each domain name by the amount of data for each flow of each domain name, obtains the amount of data for each flow of each domain name, and to multiply the amount of data by the number of the DNS requests for each domain name, so as to calculate an estimate of the amount of data for each domain name.

公开(公告)号：US20240048443A1

公开(公告)日：2024-02-08

申请号：US18266342

申请日：2020-12-09

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Takeru INOUE ,  Toru MANO ,  Kazuya ANAZAWA ,  Hideki NISHIZAWA

IPC: H04L41/0823 ,  H04L41/142 ,  H04Q11/00

CPC classification number: H04L41/0823 ,  H04L41/142 ,  H04Q11/0062

Abstract: A connection optimization device that optimizes connections between a plurality of FXC switches for switching connections of optical fibers includes a optimization unit for receiving, as inputs, a number k of FXC switches, a number n of sending/receiving ports, and a connection probability matrix C of the sending/receiving ports and swapping rows and columns of the connection probability matrix C so as to maximize an expected value D in which a connection probability using a short path connecting between the sending/receiving ports connected in the same FXC switch becomes the largest, and a swapping port information output unit for outputting difference information between the connection probability matrix C and the optimization matrix C* in which the rows and the columns are swapped by the optimization unit.

公开(公告)号：US20230412950A1

公开(公告)日：2023-12-21

申请号：US18271572

申请日：2021-01-12

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Kazuya ANAZAWA ,  Toru MANO ,  Takeru INOUE ,  Hideki NISHIZAWA

IPC: H04Q11/00

CPC classification number: H04Q11/0062 ,  H04Q2011/0083 ,  H04Q2011/0073

Abstract: An orchestrator includes: a communication request reception unit that receives a communication requirement from a first computer; an optical transport NW design unit that determines an optical path to be used for communication based on the communication requirement and a state of an optical transport path of an optical transport network and calculates setting information to be set to an optical network device of each of a plurality of nodes to construct the optical path; a result output/transmission unit that transmits the setting information to the optical network device to each of the plurality of nodes; and an ACK transmission unit that transmits the setting completion notification to the first computer after receiving a setting completion response of the setting information from the plurality of nodes .

公开(公告)号：US20230138720A1

公开(公告)日：2023-05-04

申请号：US17913478

申请日：2020-04-21

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Takeru INOUE ,  Atsushi TANIGUCHI ,  Toru MANO ,  Kazuya ANAZAWA ,  Kohei MIZUNO ,  Kengo NAKAMURA ,  Masaaki NISHINO ,  Norihito YASUDA ,  Masakazu ISHIHATA

IPC: G06F30/20

Abstract: An object of the present disclosure is to search for a command sequence, while preventing overlooking as much as possible, in a shorter period of time than that of searching using only an actual system is used.
The present disclosure provides an execution procedure searching device that searches for a command sequence to be set for a plurality of devices constituting a system. The execution procedure searching device performs a first step for determining whether a simulator of the system having executed a temporary update command sequence satisfies a predetermined policy, and executes, until satisfaction for the predetermined policy of the simulator, processing for: performing a second step for determining whether the simulator approaches a state where the predetermined policy is satisfied, with addition of one new candidate command of one or more new candidate commands to the temporary update command sequence on condition that the simulator does not satisfy the predetermined policy; and deleting a command at the end of the temporary update command sequence on condition that the simulator does not approach the state where the predetermined policy is satisfied, with addition of any one of the new candidate commands; and then returning to the first step.

公开(公告)号：US20220345919A1

公开(公告)日：2022-10-27

申请号：US17764218

申请日：2019-10-01

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Kahoko TAKAHASHI ,  Riichi KUDO ,  Takeru INOUE ,  Kohei MIZUNO

IPC: H04W24/08 ,  H04W64/00 ,  G06V10/764 ,  G06T7/70

Abstract: An object is to provide a wireless terminal and a communication quality prediction method for enhancing the versatility of communication quality prediction. In the wireless terminal and the communication quality prediction method according to the present invention, objects are extracted from surrounding environment information such as a camera image collected by a surrounding environment information collection unit, the objects are classified into predetermined categories (for example, whether the extracted objects are persons or machines or whether their moving speeds are high or low), and an image is reconstructed for each category. It is possible to predict communication quality based also on, for example, operations or materials of the objects, by performing machine learning of the communication quality after reconstructing the image for each category.

公开(公告)号：US20230132633A1

公开(公告)日：2023-05-04

申请号：US17913468

申请日：2020-04-21

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Takeru INOUE ,  Atsushi TANIGUCHI ,  Toru MANO ,  Kazuya ANAZAWA ,  Kohei MIZUNO ,  Kengo NAKAMURA ,  Masaaki NISHINO ,  Norihito YASUDA ,  Masakazu ISHIHATA

IPC: H04L45/42 ,  H04L45/00 ,  H04L45/02

Abstract: An object of the present disclosure is to perform automatic restoration from network failures even when complicated operations for executing a plurality of commands are required. The present disclosure relates to a network setting device that is communicatively connected to a plurality of network devices and performs a setting of the plurality of network devices. The network setting device performs a first step for determining whether a network including the plurality of network devices satisfies a predetermined operational policy. When the predetermined operational policy is not satisfied, the network setting device executes processing for: performing a second step for determining whether a reachable range of a packet expands with addition of one of one or more new candidate commands to a temporary update command sequence; deleting a command at an end of the temporary update command sequence on condition that the reachable range does not expand with addition of any one of the new commands; and then returning to the first step, until the predetermined operational policy is satisfied.

公开(公告)号：US20220352995A1

公开(公告)日：2022-11-03

申请号：US17605347

申请日：2019-04-26

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Riichi KUDO ,  Takeru INOUE ,  Atsushi TANIGUCHI ,  Kohei MIZUNO

IPC: H04B17/373 ,  G06V20/50 ,  G06V10/774 ,  G06V10/72

Abstract: An object is to provide a communication system and a terminal capable of predicting future communication quality in order to enable variations in communication quality due to variations in environment to be addressed. A communication system and a terminal according to the present invention learn an input and output relationship from terminal information such as surrounding environment information of the terminal that can be acquired by a camera, a sensor, or the like, and position information of the terminal and current communication quality to generate a learning model, and predict future communication quality using the learning model, the surrounding environment information and the terminal information.

公开(公告)号：US20220210622A1

公开(公告)日：2022-06-30

申请号：US17604248

申请日：2019-04-26

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Riichi KUDO ,  Takeru INOUE ,  Atsushi TANIGUCHI ,  Kohei MIZUNO

IPC: H04W4/38 ,  H04B17/373 ,  H04W4/029

Abstract: An object is to provide a communication system and a base station capable of predicting future communication quality in order to enable variations in communication quality due to variations in environment to be addressed. A communication system and a base station according to the invention learn an input and output relationship from surrounding environment information of the base station that can be acquired by a camera, a sensor, or the like, terminal information such as position information of a terminal and current communication quality to generate a learning model, and predict future communication quality using the learning model, the surrounding environment information, and the terminal information.