公开(公告)号：US11057294B2

公开(公告)日：2021-07-06

申请号：US16636158

申请日：2018-07-24

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION ,  TOHOKU UNIVERSITY

发明人： Takeru Inoue ,  Osamu Akashi ,  Kimihiro Mizutani ,  Nei Kato ,  Zubair Md Fadlullah

IPC分类号： H04L12/751 ,  H04L12/707 ,  H04L12/721 ,  H04L12/803

摘要： The route control method and the route setting device according to the present invention is configured such that a learning unit is prepared for each path, a function form of the learning unit of the path in forwarding a packet is adjusted by having traffic information (packet arrival rate, queue length, and the like) and congestion information (congested or not congested) of this path as teacher data, and when this path is congested, changing to a path with an output of no congestion among the learning units is executed. Thus, since the learning unit optimizes the function form, changing to an alternative path can be immediately executed even when the congestion incidentally occurs on the path.

公开(公告)号：US11722397B2

公开(公告)日：2023-08-08

申请号：US17596212

申请日：2019-06-26

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Atsushi Taniguchi ,  Takeru Inoue ,  Kohei Mizuno

IPC分类号： G06F15/173 ,  H04L43/55 ,  H04L47/2491 ,  H04L12/28 ,  H04L41/14

CPC分类号： H04L43/55 ,  H04L12/28 ,  H04L41/145 ,  H04L47/2491

摘要： Provided are a reliability estimation system and a reliability estimation method capable of reducing a calculation amount of a reliability of a plurality of networks between terminals in communication between the terminals over the plurality of networks. The reliability estimation system according to the present invention calculates, for each network, a contraction reliability Rx, a contraction reliability Rx′ when nodes are contracted, and a contraction reliability RB′ between the networks including the terminals, and a true value of the reliability between the terminals over the plurality of networks is between a product P1 (=RB′ Rx) and a product P2 (=RB′ Rx′). Instead of calculating the true value of the reliability, only an upper limit and a lower limit are calculated, and thus, it is possible to significantly low additional remark the calculation amount.

公开(公告)号：US10608981B2

公开(公告)日：2020-03-31

申请号：US15546169

申请日：2016-02-16

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Takeru Inoue ,  Keisuke Ishibashi ,  Akihiro Shimoda ,  Kazumichi Sato ,  Tatsuya Mori ,  Shigeki Goto

IPC分类号： H04L29/12 ,  H04L29/06 ,  H04L29/08

摘要： A name identification device includes a generation unit configured to generate graph information in which each node represents one of names and IP addresses included in A records and CNAME records included in a DNS response observed in a network, and each edge represents a correspondence relationship between one and another of the names and the IP addresses in the A records and the CNAME records, and to associate the generated graph information with a client corresponding to the DNS response; and an identifying unit configured to identify a name related to a leaf node that is reachable from a node corresponding to the IP address of a server by tracing the edges in the graph information having been associated with the client, for a packet between the client and the server that is observed in the network.

公开(公告)号：US12133114B2

公开(公告)日：2024-10-29

申请号：US17604052

申请日：2019-04-26

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Riichi Kudo ,  Takeru Inoue ,  Atsushi Taniguchi ,  Kohei Mizuno

IPC分类号： H04W28/08 ,  H04W28/082 ,  H04W28/18

CPC分类号： H04W28/0942 ,  H04W28/082 ,  H04W28/18

摘要： An event regarding control of a terminal that significantly affects communication quality with which communication 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：US11902154B2

公开(公告)日：2024-02-13

申请号：US17913468

申请日：2020-04-21

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Takeru Inoue ,  Atsushi Taniguchi ,  Toru Mano ,  Kazuya Anazawa ,  Kohei Mizuno ,  Kengo Nakamura ,  Masaaki Nishino ,  Norihito Yasuda ,  Masakazu Ishihata

IPC分类号： H04L45/42 ,  H04L45/00 ,  H04L45/02 ,  H04L45/48

CPC分类号： H04L45/42 ,  H04L45/02 ,  H04L45/08 ,  H04L45/48 ,  H04L45/566

摘要： 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：US12028788B2

公开(公告)日：2024-07-02

申请号：US17604248

申请日：2019-04-26

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Riichi Kudo ,  Takeru Inoue ,  Atsushi Taniguchi ,  Kohei Mizuno

IPC分类号： H04W4/00 ,  H04B17/373 ,  H04W4/029 ,  H04W4/38

CPC分类号： H04W4/38 ,  H04B17/373 ,  H04W4/029

摘要： 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.

公开(公告)号：US10511500B2

公开(公告)日：2019-12-17

申请号：US15550966

申请日：2016-02-16

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Akihiro Shimoda ,  Keisuke Ishibashi ,  Takeru Inoue ,  Kazumichi Sato ,  Tatsuya Mori ,  Shigeki Goto

IPC分类号： H04L12/26 ,  H04L29/12

摘要： An estimation device is provided that measures a number of DNS requests for each of a plurality of domain names and for each IP address in observed flows. The device 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, multiplies 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.