公开(公告)号：EP4002775A1

公开(公告)日：2022-05-25

申请号：EP19940808.9

申请日：2019-08-05

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： KITAMURA Kei ,  INUZUKA Fumikazu ,  SHINTAKU Kengo ,  ODA Takuya ,  TANAKA Takafumi ,  TOMIZAWA Masahito

IPC分类号： H04L12/707 ,  H04B10/032 ,  H04L29/14

摘要： A transmission apparatus includes a control unit for carrying out processing to secure a resource for a standby system path in response to detection of a sign of failure in an active system path.

公开(公告)号：EP4366263A1

公开(公告)日：2024-05-08

申请号：EP21948244.5

申请日：2021-06-28

申请人： Nippon Telegraph And Telephone Corporation

发明人： ODA Takuya ,  OHARA Takuya ,  INUZUKA Fumikazu ,  HIGASHIMORI Katsuaki ,  SHINTAKU Kengo

IPC分类号： H04L45/00

CPC分类号： H04L41/0816 ,  H04L41/40

摘要： A communication system is a communication system that includes: a plurality of transmission devices; a setting server that receives an instruction to change data related to setting of a data network; and a control server that performs a control process related to the plurality of transmission devices and the data network on a basis of the data. In the communication system, a setting processing unit is provided to perform a process for constructing a customer control network between a first transmission device and the setting server by using a second transmission device as a relay device, when the first transmission device and the second transmission device are connected by an optical transmission line. The first transmission device includes: a connection processing unit that performs a process for constructing a control network between the first transmission device and the control server by using the second transmission device as a relay device, when the first transmission device and the second transmission device are connected by the optical transmission line; and a device control unit that performs a process for constructing the data network for the first transmission device by using the second transmission device as a relay device, when the first transmission device and the second transmission device are connected by the optical transmission line.

公开(公告)号：EP3876471A1

公开(公告)日：2021-09-08

申请号：EP19896696.2

申请日：2019-12-04

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： INUZUKA Fumikazu ,  KITAMURA Kei ,  HIRANO Akira ,  TOMIZAWA Masahito ,  OHARA Takuya

IPC分类号： H04L7/00 ,  H04L12/70

摘要： A first reception processing unit performs a process of receiving a first signal transmitted on a first transmission line, a second reception processing unit performs a process of receiving a second signal transmitted on a second transmission line, and an output speed control unit controls output speeds of the first signal and the second signal subjected to the reception process. A system switching unit selects and outputs the first signal or the second signal subjected to a reception process, and an output processing unit performs a process for output to another apparatus on the output from the system switching unit. A reception side clock output unit outputs a clock signal giving a processing timing of each process, and a clock frequency control unit adjusts a frequency of the clock signal giving the processing timing to the output processing unit. A frequency adjustment range calculation unit calculates an adjustment range of the frequency based on frequency deviation accuracy of the reception side clock output unit, frequency deviation accuracy of a transmission side clock output unit that outputs a clock signal giving a processing timing to a transmission process at a transmission apparatus on the transmission side, and a prescribed value of a frequency deviation.