Yoshimasa Baba

A GMPLS-based path establishment experiment with tunable dispersion compensation over in-field fibers

This paper reports an experiment over in-field fibers applying GMPLS (Generalized Multi-Protocol Label Switching)-based control for automatic discovery of chromatic dispersion and wavelength path establishment with tunable dispersion compensation. Two wavelength paths were successfully established with error-free data transmission.

A New User Authentication Protocol for Mobile Terminals in Wireless Network

For constructing a ubiquitous network, the highspeed wireless LAN (WLAN) attracts attention as an infrastructure for global access. However, some issues are impeding further adoption of the technology, in particular, security problems including user authentication, message compromising, password theft, connection hijacking, etc. In this paper, we discuss a fast authentication method of mobile ubiquitous terminals in WLAN. To achieve an efficient access control between Access Points (APs) and mobile terminals and sharing of a session key between terminals, we propose a new user secure authentication method and a session key distribution protocol based on service ticket issuing system.

Design of a chromatic dispersion measurement control protocol based upon the GMPLS architecture

This paper analyzes requirements of measurement control for chromatic dispersion based upon GMPLS and defines an abstract control protocol applicable to both link and path measurements. The protocols LMP application has successfully demonstrated measurement control.

Impairment compensation control for wavelength switched optical networks (WSON)

For automatically switched dynamic wavelength paths meeting traffic demands of metro/core networks, precise determination of physical impairments over such paths and appropriate configuration of their compensation capabilities are required. This paper discusses control protocol for impairment measurement and compensation configuration for wavelength paths based on the IETFs WSON standardization efforts.

Fault recovery with routing and adaptation control of chromatic dispersion

We propose mechanisms of routing and adaptation control of chromatic dispersion to enable fast recovery in various fault recovery schemes for all-optical networks. A link protection with routing based on chromatic dispersion errors is proposed and evaluated.

Design and implementation of Chromatic Dispersion control protocol

We propose and demonstrate a control protocol of automatic measurement of Chromatic Dispersion (CD) for compensation on dynamic all-optical paths. The control protocol reduces operational cost and time to establish paths with sufficient quality.

A proposal and evaluation of multi-class optical path protection scheme for reliable computing

Emerging GMPLS (Generalized Multi-Protocol Label Switching)-based photonic networks are expected to realize dynamic allocation of network resources for high-performance computing. To address diverse reliability requirements of computing, various optical path recovery schemes, some of them under GMPLS standardization, should be supported on a photonic network. This paper proposes multi-class optical path protection scheme, supporting 1+1 protection, M:N protection, and extra path reusing back-up resources, for a unified approach to build such a network. The proposed scheme was implemented on an OXC prototype and its path establishment time and failure recovery time were evaluated. It was confirmed that a node supporting a wide range of recovery capabilities could realize small or relatively small recovery time to various applications according to their diverse reliability requirements.