A5025236736- Distributed and Parallel Computing Systems
- Advanced Data Storage Technologies
- Network Traffic and Congestion Control
- Advanced Optical Network Technologies
- Magnetic confinement fusion research
- Embedded Systems Design Techniques
- Software-Defined Networks and 5G
- Distributed systems and fault tolerance
- Superconducting Materials and Applications
- Environmental Monitoring and Data Management
- Scientific Computing and Data Management
- IPv6, Mobility, Handover, Networks, Security
- Advanced Photonic Communication Systems
- Caching and Content Delivery
- Service-Oriented Architecture and Web Services
- Formal Methods in Verification
- Multimedia Communication and Technology
- Big Data Technologies and Applications
- Wireless Networks and Protocols
- Software Testing and Debugging Techniques
- Optical Network Technologies
- Advanced Computing and Algorithms
- Power Line Communications and Noise
- Cloud Data Security Solutions
- Online Learning and Analytics
National Institute of Informatics
2014-2023
The Graduate University for Advanced Studies, SOKENDAI
2016-2021
NTT (Japan)
2002-2012
Sendai National College of Technology
2006
SINET5 is a new 100-Gbps-based academic backbone network, which started full-scale operations in April 2016. It uses multi-protocol label switching-transport profile (MPLS-TP) systems and reconfigurable optical add-drop multiplexers (ROADMs) to create nationwide network has more than 50 IP routers provide wide range of services, such as several virtual private (VPN) services. provides end-to-end data communications up 100 Gbps throughput, minimized-latency, software-defined networking...
This paper describes an architectural design and related services of a new Japanese academic backbone network, called SINET5, which will be launched in April 2016. The network cover all 47 prefectures with 100-Gigabit Ethernet technology connect each pair minimized latency. enable users to leverage evolving cloud-computing powers as well draw on high-performance platform for data-intensive applications. transmission layer form fully meshed, SDN-friendly, reliable network. evolve more dynamic...
This paper gives a brief report on new 100-Gbps academic backbone network, called SINET5, which started full-scale operations in April 2016. SINET5 has more than 50 routers and forms fully meshed topology by using MPLS-TP systems to provide researchers every Japanese prefecture with access, minimized-latency, SDN-friendly environments. multi-layer, dynamically configurable, performance-tunable platform for wide range of network applications including inter-cloud services. The multi-layer...
We report the first real-time demonstration of 600Gbps/carrier WDM transmission on field installed fibers. also demonstrated network recovery operation highly-survivable adaptive restoration and numerically verified its effectiveness in enhancing system reliability.
This paper describes the architectural design, services, and operation monitoring functions of Science Information NETwork 6 (SINET6), a 400-Gigabit Ethernet-based academic backbone network launched on nationwide scale in April 2022. In response to requirements from universities research institutions, SINET upgraded its world-class speed, improved accessibility, enhanced services security, incorporated 5G mobile functions, strengthened international connectivity. With fully-meshed...
Cloud computing provides more efficient resource utilization and reduced costs for software systems. However, performance assurance of these systems is difficult because the execution environment cannot be precisely specified can change dynamically. This paper presents a new programming paradigm, in which independent from environments. The paradigm called clock driven (CDP). main idea to introduce notion periodic timer, i.e., clock, synchronizing program timing, just like signal used...
Fusion Information Science Centre is being planned as a research infrastructure integrating functions of ITER Remote Experimentation Centre, Computational Simulation and replicated DB. Conceptual design storage system for the FISC which consists short-term storage, long-term data warehouse proposed to satisfy requirements fast transfer, intershot analysis, conventional offline machine learning has been studied based on assessment characteristics each access.
Technical verification has been progressing for high efficiency data replication between ITER and the Remote Experimentation Centre (REC) in Japan. Transferring a huge amount of simultaneously to multiple destinations might cause excessive loads network bandwidth on sender so that daisy-chained relay transfer would be considerable solution. This study demonstrates how efficiently could realized next-generation fusion experiments, such as JT-60SA. All LHD were consecutively sent REC through...
The paper proposes a communications service specification description method that reduces the number of message sequence charts (MSCs) designers need to describe. This uses MSCs and rules for generating error-handling procedures. Experimental application proposed shows this hybrid enables specifications target services be described with about 10% fewer than when using only MSCs.
Some techniques and languages which support the design of digital logic have been traditionally presented. In this paper, we propose a new automaton model enables to concisely specify PLCs including delay time-control by introducing two kinds delays. Moreover, develop tool can intelligibly simulate behavior system specified model.