Osamu Kamatani

Achieving large bandwidth by leveraging parallelism in end-hosts and networks

This paper describes the first experiment on Multi-Rail and MultiLane technologies using global networks. These technologies leverage end-host and network parallel resources, e.g., processor cores and lambda paths, to achieve large bandwidths.

Construction of Routing Information Knowledge Base towards Wide Area Network Management

Nowadays each network management system (NMS) adopts different methods for collecting network information and different data structures. This makes NMS cooperation difficult, especially in multi-AS wide area network management. The current goal of the KANVAS (Knowledge base system in wide Area Networks with general Versatility, Availability and Scalability) project is to realize wide area network management by constructing a knowledge base system in networks. This paper discusses construction of a knowledge base system in a single AS (Autonomous System) towards the future wide area network management. This paper also shows the design and implementation of the knowledge base system that collects network configuration information from OSPF and SNMP, and stores it as instances of our proposed network ontology called Bonsai. Additionally, a prototype application that accesses the stored knowledge was implemented. The evaluation of basic performance and scalability of the system was carried out using a real AS topology and synthetic topologies and it was made sure that the prototype application works correctly. As a result, this paper shows that feasibility of the future wide area network management that adopts the knowledge base system.

Leveraging end-host parallelism to achieve scalable communication bandwidth utilization

This paper describes experiments to explore the scalability of the MultiRail technology. MultiRail leverages endhost parallel resources to achieve large bandwidth. We confirm that MultiRail scales bandwidth by better utilizing the parallel resources.

The value centric information and intelligence sharing scheme

The information in the network has been increasing, and it is dominated by a few heavy users. This imbalance is an insignificant problem if there is an abundance of network resources. Unfortunately, the available resources are not infinite. Thus we have to develop a future network architecture that considers resource starvation. We present Value-Centric Networking (VCN) which is based on Information Value. The main purpose of VCN is to maximize Information Value in the network, and thus support the entire society. We implement the VCN architecture concept in the form of a proxy server and confirmed that VCN operation forwarded the high information value streams passing through the proxy server faster than ordinary FIFO operation. In addition, we discuss the controversial issues of VCN, value definition and feasibility.

Terabit/s-scalable end-to-end parallel networking architecture (TLAN) based on virtual optical resource control

Terabit/s-scalable end-to-end parallel networking architecture (TLAN) based on virtual optical resource control for a high-end scientific application is outlined. Multi-rail- and Multi-lane-aware networking architecture, the relevant photonic technologies, the requirements of optical devices and interfaces for TLAN optical node deployments are also discussed.

Controlling correlative chaos in dual-color laser for cryptographic communication

Chaotic fluctuation of light, which is being intrinsically different from deterministic chaos in lasers, arises from quantum-optic stochastic processes, and it therefore cannot be artificially replicated. When the fluctuation is correlative, however, it will be of more use in practical applications such as cryptographic communications. Throughout various experiments, it was found that a double-ring laser having a common semiconductor gain medium with strong saturation characteristics can produce a stable light beam consisting of negatively correlative dual-color components. Although each component decomposed by chromatic beam splitting is chaotic, their combination regenerates a stable light beam. This means that the photon-number states can be controlled by using an optical processing scheme for a correlative dual-color chaotic beam. How such a beam is generated is explained by a simple numerical simulation using a finite Markov chain model that assumes strong short-term intensity correlation between the components. A possible cryptosystem is presented based on the controllability of the photon-number state.