Yoshihiro Takigawa

G-lambda: coordination of a grid scheduler and lambda path service over GMPLS

A vertical coordination between computing resource scheduler and network resource scheduler for Grid-based applications is described. The network resource management system virtualizes and schedules network resources to inter-work with Grid resource scheduler through Web-services interface.

Terabit LAN with optical virtual concatenation for Grid applications with super-computers

This paper proposes an optical local area network that can transmit terabit-class bulk-data with low latency in a dynamic manner. A group of wavelengths is assigned to bulk-data transmission according to the latency requirement, and parallel WDM signals are transmitted with bit-phase synchronization mechanism after fast provisioning.

The first functional demonstration of optical virtual concatenation as a technique for achieving terabit networking

The optical virtual concatenation (OVC) function of The Terabit LAN was demonstrated for the first time at the iGrid 2005 workshop in San Diego, California. The TERAbit-LAN establishes a lambda group path (LGP) for an application where the number of lambdas/L2 connections in a LGP can be specified by the application. Each LGP is logically treated as one end-to-end optical path, so during parallel transport, the LGP channels have no relative latency deviation. However, optical path diversity (e.g. restoration) can cause LGP relative latency deviations and negatively affect quality of service. OVC hardware developed by NTT compensates for relative latency deviations to achieve a virtual bulk transport for the Electronic Visualization Laboratorys (EVL) Scalable Adaptive Graphics Environment application.

The First Application-driven Lambda-on-Demand Field Trial over a US Nationwide Network

The Lambda-on-demand functionality with link aggregation to accommodate the dynamic bandwidth demands of an ultra-high-resolution visualization application was realized in over a US nationwide photonic network for the first time.

Stable IP-Routing Link Restoration: GUNI Restoration for Data Link Failure Between Routers in a Nationwide Photonic Network

A GMPLS (Generalized Multi-Protocol Label Switching)-based link restoration scheme with IP-routing stability for data link failure between routers through a PXC (Photonic Cross-Connect) network was proposed and successfully demonstrated in a US nationwide photonic network for the first time.

Development of photonic MPLS router

The amount of data traffic over the Internet has grown remarkably. The photonic multi-protocol label switching (MPLS) router (PR) has been developed to control this burgeoning amount of traffic. It incorporates optical network elements that have a generalized MPLS (GMPLS) signaling capability and an IP forwarding processor. This paper presents issues regarding path control development and describes a successful demonstration of the router capabilities.

An ATM-PON architecture for multimedia services

An ATM-PON system for an access network is proposed to support multimedia service efficiently. An ATM emulation layer (ATME) is newly defined above the PON section layer and placed on the same level as the ATM layer to carry ATM payload directly. The bi-directional 54 byte cell format including 6 byte header realizes high throughput. The grant for upstream transmission is controlled by VP level and yields flexible bandwidth allocation considering the Quality of Service.