Nippon Telegraph and Telephone Corporation

Keita Nishimoto

Kota Asaka

Yukio Toyoshima

Junichi Kani

Takashi Yamada

Tomoya Hatano

Manabu Yoshino

Takashi Mitsui

Masashi Tadokoro

Toshikiyo Tanaka

Takeaki Mochida

Akiyuki Takeda

One aspect of the present invention is a optical main signal processing node apparatus including: an input port for inputting an optical multiplexed with signals pertaining to a plurality of services from an optical transmission path; an output port for outputting an optical signal multiplexed with signals pertaining to a plurality of services to an optical transmission path; a optical main signal processer configured to perform optical main signal processing on an optical signal input from the input port; and a path switch configured to switch a path of the optical signal input from the input port to one of a first path for guiding the optical signal to the output port and a second path for guiding the optical signal to the optical main signal processer.

Optical main signal processing node apparatus and control method of optical main signal processing node apparatus

A communication system includes a branching device, a plurality of acceptance judgement apparatuses connected to the branching device, and processing devices each connected respective one of the plurality of acceptance judgement apparatuses and performing processing according to a received signal. The acceptance judgement apparatus includes a reception unit, a determination unit, and a transfer unit. The reception unit receives one of a plurality of signals which have been broadcast by the branching device. The determination unit determines whether or not to transfer a first signal that is a signal which has been received by the reception unit to one of the processing devices connected to the own apparatus on the basis of the first signal and one or more second signals that are one or more signals which have been received by the reception unit before the first signal. The transfer unit transfers the first signal to one of the processing devices connected to the own apparatus when the determination unit determines to transfer the first signal, and discards the first signal when the determination unit determines not to transfer the first signal.

Acceptance judgment apparatus and acceptance judgment method

A transmitter management device includes: a reception unit that receives a virtual switch configuration request from an upper management system; a determination unit that determines a plurality of paths including transfer processing by different optical transmitters on the basis of the configuration request received by the reception unit; and a setting unit that performs a setting for a plurality of the optical transmitters in such a way that a virtual switch that executes transfer processing on the basis of the paths determined by the determination unit is configured for each one of a plurality of the paths.

Transmission device management device, transmission device management system, transmission device management method and program

An optical buffer unit includes a plurality of delay line units each of which gives a delay to optical signals, and a switch that receives an optical signal output from one of the delay line units, includes a first output for outputting the optical signal to a next one of the delay line units and a second output for outputting the optical signal to another apparatus, and outputs the optical signal from the first output or the second output.

Optical buffer unit, optical signal processing apparatus, optical label switch and control method

A communication apparatus includes a packet reception unit; a packet transmission unit; and a processing sequence control unit that controls a processing sequence, and the processing sequence control unit includes a packet holding unit; function instances for respective function files including groups of procedures and groups of variables; an instance information management unit that holds instance information including function instance identifiers identifying the function instances, procedure identifiers identifying the procedures belonging to the function instances, and memory addresses of the procedures; an execution sequence information management unit that holds execution sequence information that associates the function instance identifiers, the procedure identifiers, return values of the procedures, and procedures belonging to function instances that are to be executed next; and a function execution unit that, on the basis of the execution sequence information and the instance information, calls a procedure, executes a process on the communication packet, and executes the next process depending on a return value.

Communication apparatus and communication method that control processing sequence of communication packet

An optical line terminal is provided with: an absorption unit that acquires first information of a type and a format that are dependent on a communication scheme and that converts the acquired first information into second information of a type and a format that are common to mutually different communication schemes; and a bandwidth allocation unit that determines bandwidth allocation of an upstream signal allocated to an optical network unit on the basis of the second information.

Optical line terminal and bandwidth allocation method

An information management system includes a first information storage configured to store first attribute information regarding a communication device, a second information storage configured to store second attribute information regarding the communication device, a related information storage configured to store information representing a relationship between the first attribute information and the second attribute information, a detector configured to detect update, addition, or deletion of the first attribute information or the second attribute information, and an updater configured to output a command for the update of the second attribute information associated with the first attribute information to the second information storage when the update of the first attribute information is detected, and to output a command for the update of the first attribute information associated with the second attribute information to the first information storage when the update of the second attribute information is detected.

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Tokyo, Japan

Keita Nishimoto