Hironari Matsuda

Internet Access System with GMPLS Architecture Configured on Wavelength Assignment Photonic Switching System

We have successfully applied Generalized Multiprotocol Label Switching (GMPLS) architecture to the Wavelength Assignment Photonic Switching System (WAPS) to create an internet access system that can provide, between terminals, not only conventional best-effort type of IP packet forwarding, but also high-speed and Quality of Service (QoS)-guaranteed IP forwarding. In this paper the system architecture, system specifications, and system hardware/software implementations are described.

Gaze Estimation Using Human Joint Rotation Angel

Currently, eye trackers can estimate with high precision using eye images. This method requires high-quality eye images, and thus cannot estimate using low-quality eye images, which have low resolution, illumination changes, and occlusions. Other methods use pose information, including head direction, body direction, and head motion. This method obtains pose information using the Eigenspace method, and thus requires a calibration phase. In addition, the eye direction using this method is only horizontal. We propose a gaze estimation algorithm that does not require high quality eye images. The purpose is estimation without using eye images, with an error of less than ten degrees. Experimental results show that the method can estimate gaze direction without using eye images.

A new pair-controlled photonic switch matrix

Pair-control is essential to save processing time of the control software for both-way communication. We have developed the pair-controlled photonic switch matrixes, which save switching elements and control circuits, and greatly contribute to the economy of the photonic switching node.

Multiwavelength optical sender/receiver mounted on a PC connected to a passive optical network

The authors have developed a multiwavelength Internet protocol (IP) packet sender/receiver to be inserted into a peripheral component interconnect (PCI)-bus slot of a personal computer (PC) or a workstation. When the PCs or workstations with the sender/receiver are connected to an Internet access network configured on a passive optical network (PON) as client terminals, a peer-to-peer connection-oriented communication path can be set up between them. The PCs can afford a real-time interactive communication with quality of service (QoS) fully guaranteed.

A Challenge to Access/Backbone Integrated Network

An integration of the access/backbone network is expected to become indispensable in the future. We analyze the current and future optical networks and we describe the promising technologies. GMPLS architecture in backbone networks and WDM PON architecture in access networks will play the most important roles. We overview recent studies on the access/backbone integrated network to achieve guaranteed QoS. We also describe the developed system architecture as a milestone toward the access/backbone integrated network.

An Optical Label Switch Router with GMPLS Architecture Developed for an Internet Access Network

Authors have developed an optical label switch router and the associated equipment which are designed for an Internet access network built on a passive optical network. The underlying concept of this system is to provide a connection-oriented optical path between peers, thus affording QoS guaranteed high-speed and real time communications.

A multiwavelength optical sender/receiver for an internet access system configured on passive optical network

The authors have developed a multi-wavelength IP packet sender/receiver to be inserted into a PCI-bus slot of a PC or a workstation. When the workstations or PCs with the sender/receivers are connected to an internet access network configured on the PON as client terminals, a pee-to-peer connection-oriented communication path can be set up between them. The PCs can afford a real-time interactive communication with QoS fully guaranteed.

Configurational design of a pair-controlled photonic switch fabric for both-way communications

Generally pair control architecture is adopted in telecommunication systems to save software processing time to setup both-way paths between a sender and a receiver. We have introduced this into a photonic switch fabric (PSF), which is a key instrument of a developed photonic label switch router (PLSR). The PLSR is to be operated as a photonic router in an optical Internet system to guarantee QoS (quality of service) and the transmission bandwidth by providing end-to-end wavelength LSPs (label switched paths). In contrast to conventional PSFs for both-way communications that do not have the capability to save switching elements and its control circuits, the proposed architecture enables us to save them drastically. General configuration of an N×N PSF is described in addition to the developed 3×3 PSF.

Pair controlled photonic switch fabric architecture

Pair control is generally adopted in telecommunication systems to save software processing time to set up both-way paths between a sender and a receiver. We have introduced new pair control architecture into a Photonic Switch Fabric (PSF) which is a key instrument of a developed Photonic Label Switch Router (PLSR). In our WAPS (Wavelength Assignment Photonic Switching System), the PLSR is to be operated as a photonic router in the optical internet system to guarantee QoS (Quality of Service) and the transmission bandwidth by providing end-to-end wavelength LSPs (Label Switched Paths). In contrast with that conventional pair controlled PSFs do not have capability to save switching elements and its control circuits, the proposed architecture enables to save them drastically.