公开(公告)号：EP4262171A1

公开(公告)日：2023-10-18

申请号：EP20965069.6

申请日：2020-12-09

申请人： Nippon Telegraph And Telephone Corporation

发明人： INOUE Takeru ,  MANO Toru ,  ANAZAWA Kazuya ,  NISHIZAWA Hideki

IPC分类号： H04L49/10

摘要： A connection optimization device that optimizes connections between a plurality of FXC switches for switching connections of optical fibers includes a optimization unit 20 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 30 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 20.

公开(公告)号：EP4280486A1

公开(公告)日：2023-11-22

申请号：EP21919250.7

申请日：2021-01-12

申请人： Nippon Telegraph And Telephone Corporation

发明人： ANAZAWA Kazuya ,  MANO Toru ,  INOUE Takeru ,  NISHIZAWA Hideki

IPC分类号： H04J14/02

摘要： An orchestrator 10 includes: a communication request reception unit 11 that receives a communication requirement from a first computer 50A; an optical transport NW design unit 16 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 300 and calculates setting information to be set to an optical network device of each of a plurality of nodes 30 to construct the optical path; a result output/transmission unit 14 that transmits the setting information to the optical network device to each of the plurality of nodes 30; and an ACK transmission unit 12 that transmits the setting completion notification to the first computer 50A after receiving a setting completion response of the setting information from the plurality of nodes 30.

公开(公告)号：EP4280467A1

公开(公告)日：2023-11-22

申请号：EP21919283.8

申请日：2021-01-13

申请人： Nippon Telegraph And Telephone Corporation

发明人： MANO Toru ,  NISHIZAWA Hideki ,  TSUKISHIMA Yukio ,  HIBI Tomoya ,  ICHIKAWA Junki ,  INOUE Kiwami

IPC分类号： H04B1/401

摘要： The communication apparatus 1 includes: a processing device 20 that processes communication data to be transmitted to and received from a partner apparatus 2; a transmission unit 14 that transmits the communication data to the partner apparatus 2; an internal state measurement unit 11 that measures a state related to transmission of the communication data between the processing device 20 and the transmission unit 14; and a determination unit 13 that determines a communication mode in communication with the partner apparatus 2 from the state. The transmission unit 14 transmits the communication data to the partner apparatus 2 in the determined communication mode.

公开(公告)号：EP4333328A1

公开(公告)日：2024-03-06

申请号：EP21939333.7

申请日：2021-04-30

申请人： Nippon Telegraph And Telephone Corporation

发明人： KITAMURA Kei ,  NISHIZAWA Hideki ,  INUI Tetsuro ,  TANAKA Takafumi ,  INOUE Takeru

IPC分类号： H04B10/27

摘要： An output port switching unit that connects to a first optical transmission path, a second optical transmission path, and the connection information processor, and sets a destination of the first optical transmission path as the connection information processor in an initial state. A controller that transmits transmission mode information indicating a transmission mode identified based on connection information of the first optical transmission path acquired from an optical signal transmitted by an optical transceiver provided in an optical communicator that the connection information processor connects to the first optical transmission path, connection request data included in the optical signal and transmitted by the optical transceiver, and transmission path information of the second optical transmission path to the optical transceiver through the first optical transmission path. The output port switching unit performs switching processing of switching a destination of the first optical transmission path from the connection information processor to the second optical transmission path after the controller transmits the transmission mode information.

公开(公告)号：EP3996297A1

公开(公告)日：2022-05-11

申请号：EP19946112.0

申请日：2019-09-17

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： HORIKOSHI Kengo ,  NAKAMURA Masanori ,  OKAMOTO Seiji ,  NISHIZAWA Hideki ,  YAMAZAKI Etsushi

IPC分类号： H04B10/2569 ,  H04B10/61

摘要： A signal processing apparatus includes: a coefficient update unit configured to approximate a characteristic of a transmission line of an optical signal by a first tap coefficient vector of which an L0 norm is a predetermined value or less; a zeroing unit configured to generate a second tap coefficient vector by replacing, with 0, a tap coefficient of which an absolute value is less than a threshold among tap coefficients of the first tap coefficient vector; and an adaptive filter configured to perform, based on the second tap coefficient vector, adaptive equalization processing on a digital signal corresponding to an optical signal received via the transmission line ( Figure 2 ).