Reliable Internet connectivity is essential, even for small businesses and K–12 schools. The Japanese national education program for "1 device for 1 student with a high-speed network" in schools requires highly reliable Internet access. Site multi-homing —connecting a network to multiple ISPs —is an effective solution. Routing policies in the site multi-homing are expected to be applied per end-host, ensuring optimal ISP selection and enhances network resilience. This paper proposes a policy routing method enabling per-end-host first-hop router selection in IPv6 site multi-homing with NPTv6. The core concept is to shift upstream ISP selection from source address selection to first-hop router selection, enabling control through the dynamic transmission of RAs via the RA controller. We present the control plane design of the proposed method. The paper also shows its effectiveness in small-scale environments, such as site multi-homing without BGP, based on evaluations using the prototype system.

A Mobile Tiled Display (MTD) is a technology to realize a large virtual display using multiple mobile terminals. Since a MTD which composed of a group of terminals with different characteristics, differences in performance among terminals and differences in the network environment affect the video playback. In this study, we propose a MTD configuration method that controls the window composition of terminals in consideration of terminal performance and network characteristics. In addition, we develop a novel MTD system that incorporates our proposed method. The developed system aims to reduce the impact of differences in terminal characteristics by placing terminals with good communication quality in the center of the screen. As an evaluation of the developed system, we investigated the time over-head of the initial window positioning configuration. The result shows that there is no problem in displaying the video in MTD, although it takes about 4.5 seconds in the case of 16 terminals. Moreover, we prepare several MTD videos using the developed system, and conduct questionnaires for subjective evaluation of the viewing experience from 60 people. and we clarified the screen composition method we developed was effective.

It is becoming easy to share cloud based desktop applications for group work among multiple users accessing them from any locations by advances in virtualization technology. This kind of sharing requires a secure mechanism for authenticating users to provide a good user experience under the group work. We have been developing a secure sharing system for cloud desktop applications migrating with those requirements. The proposed system includes a user authority authentication mechanism using attribute-based encryption and IP mobility mechanism migrating desktop applications from the current cloud to the other one to improve the quality of the user's interaction. This paper describes implementation of the proposed system and the specification of a prototype system.

With the rapid spread of various services by IoT(Internet of Things) / CPS (Cyber-physical System), the growing requirement of the edge computing platform for minimizing communication latency is inevitable on the Internet. These platforms generally have to support migrating the edge server instance available for use by nearby mobile devices. In this paper, we design the MEC (Mobile Edge Computing/Multi-access Edge Computing) platform which brings cooperative processing between an edge server and a mobile device. Our approach is focusing on the requirement for continuous and transparent communication as well as latency reduction to improve the offload processing between the edge server and the mobile device. The proposed platform uses an IP mobility support gateway at each network domain to achieve this requirement, and establish communication relationship among these gateways by controlling via orchestrators. We also implement the prototype system, indicate its effectiveness from the viewpoints of throughput and processing time.

In this paper, we propose an edge computing platform that can coordinate with each computing resources of device, edge node and cloud for diversifying data can be modularized and actively deployed in cooperation within the wide area network. This platform brings transparent processing environment for IoT devices according to a data characteristic or use purpose. We have been developing the platform based on open-source software for container and its automating deployment, scaling, and management tool.

In recent years, much attention has been paid to wide area distributed storages to backup data remotely and ensure that business processes can continue in terms of disaster recovery. In the 'distcloud' project, authors have been involved in the research of wide area distributed storage by clustering many computer resources located in geographically distributed areas, where the number of sites is more than 2 (N>2). The storage supports a shared single POSIX file system so that LDLM (Long Distance Live Migration) of VMs (Virtual Machines) works well between multiple sites. We introduce the concept and basic architecture of the wide area distributed storage and its technical improvement for LDLM. We describe the result of our experiment, that is, 1) Nation Wide Live Migration (about 500Km) in Japan, and 2) Transpacific Live Migration (over 24,000Km). We show the technical benefit of the current implementation and discuss suitable applications and remaining issues for further research topics.

In the institutions of higher education, hundreds of intellectual activities, i.e. lectures, are performed everyday. It is very important for such institutions to have a system which can archive these activities as their property efficiently and systematically. However it will not always be the good materials for on-demand distance learning if we record the usual lectures. On the other hand, the live distance lecture has been performed. Although some revisions are required, the archives of live distance lecture is well suited for the materials of on-demand distance learning by nature. In this paper we describe the MPEG2 over IP transfer system which is the key technology to integrate the live distance lecture and on-demand distance learning. And then we describe the live distance lecture archive system operated in Hiroshima University.