Takuhiro Otani

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Dynamic protection mechanism was proposed to provision each individual LSP in a group LSP with differentiated survivability. A resilient multi-QoS burst streams transmission over the group LSP was demonstrated in a GMPLS-controlled transparent optical network.
In order to facilitate interoperability in a network composed of next generation lambda-switch-capable equipment, this document defines a standard lambda label format that is compliant with the Dense Wavelength Division Multiplexing (DWDM) and Coarse Wavelength Division Multiplexing (CWDM) grids defined by the International Telecommunication Union(More)
An asymmetric neighborhood function was proposed by Aoki and Aoyagi to instead of symmetric neighborhood function in conventional Kohonen's self-organizing map (SOM) to avoid topological twist of the order of units during training process. Meanwhile, a one dimensional ring type growing SOM was proposed by Ohta and Saito to reduce the unnecessary increasing(More)
The design of Layer 2/lambda-hybrid Internet exchange (IX) is presented in order to provide lambda connectivity services as well as to achieve layer 2 traffic congestion control. The trial results of such hybrid IX field environment are described from the point of lambda path provisioning as well as bandwidth modification operation.
A centralized path computation element integrated with optical performance monitoring was developed for transparent optical network. Appropriate path establishment satisfying requisite transmission performance was successfully confirmed in the testbed.
Wireless technologies are rapidly being adapted from simple monitoring and control to supervisory control and data acquisition (SCADA) system. Wireless provides highly reliable data communications in harsh and interference-heavy environment. In this article, new wireless SCADA system has been built to control Al-Najaf cement plant wirelessly. Two pieces of(More)