Details of a Researcher - OKOSHI Tadashi

Papers - OKOSHI Tadashi

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Design and Implementation of Dynamic Distributed Software Toolkit "Meta Space"

FUJIMURA Hiroshi, NAKAZAWA Jin, OKOSHI Tadashi, TOKUDA Hideyuki

IPSJ SIG Notes (Information Processing Society of Japan (IPSJ)) 1999 ( 32 ) 119 - 124 1999.05

ISSN 09196072

In this research, we propose a software model for the dynamic distribution of software components across a wide-area network, and we provide a software environment to realize the proposed model. In the dynamic distributed software model, software modules can autonomously migrate among computers. This feature allows dynamic distributed software to have the advantage of dynamic load balancing, fault tolerance, scalability, optimization of computing environment, and the processing support for small-size portable devices. Moreover, we designed and implemented a dynamic distributed software toolkit named "Meta Space".

Inforgent：モーバイルエージェントを用いた情報閲覧支援環境

牧野聡, 大越匡, 中澤仁, 徳田英幸

情報処理学会研究報告システムソフトウェアとオペレーティング・システム（OS） 1999 ( 32(1999-OS-081) ) 113 1999.05

Joint Work

MobileSocket: Enhanced Socket Library for Application Layer Continuous Operations

Okoshi Tadashi, Tobe Yoshito, Tokuda Hideyuki

情報処理学会研究報告システムソフトウェアとオペレーティング・システム（OS） 1999 ( 32(1999-OS-081) ) 29 1999.05

Joint Work

Design and Inplementation of Dynamic Distributed Software Toolkit ‘MetaSpace’

H Fujimura, J Nakazawa, T Okoshi, H Tokuda

SIGOS Notes, 119-124 1999

MobileSocket: Toward continuous operation for Java applications

T Okoshi, M Mochizuki, Y Tobe, H Tokuda

Proceedings Eight International Conference on Computer Communications and … (IEEE) 50 - 57 1999

Joint Work, Accepted, ISSN 9780780357945

© 1999 IEEE. This paper proposes "MobileSocket" which realizes session layer communication continuity support for Java Applications towards the continuous operations for mobile applications. In the mobile computing environment where mobile hosts move around the network even during communications with the remote, maintenance of the communication continuity between the applications is significant. Not only mobility support but virtual circuit continuity support is required for communication continuity. Existing approaches have not provided the complete communication continuity for applications. "MobileSocket" is a user-level enhanced socket library written in Java, and provides library-based session layer mobility and virtual circuit continuity support for applications. Two mechanisms, dynamic socket switching (DSS) and the application layer window (ALW) were developed for MobileSocket and enable a simple implementation. The MobileSocket applications can be used in Java mobile applications and the agents, as well as for ordinary network applications. In this paper, after we clarify the communication continuity and existing approaches, we present the MobileSocket design, mechanism, and results of evaluation.