Resarch

Random walks play an important role in computer science, spreading a wide range of topics in theory and practice, including networking, distributed systems, and optimization.

Mobile ad-hoc network consists of a collection of mobile devices that are interconnected each other. It has attracted attention in various areas such as information sharing and intelligent transportation. In particular, information sharing on MANET in an emergency is crucial for victims. In this situation, information on relief supplies and safety confirmation should be replicated to keep it on the network as long as possible. On the other hand, the cost of replicated information should be taken into account since the storage of each mobile device is limited.

IoT environment is becomming as an important infrastructure for various services. On the other hand, it is required to be highly secured because it includes individual information. However, IoT environment consists of various devices such as remote cameras, sensors and computer systems. OS, firmwares and softwares running on them might have some vulnerability.  Individual information could be leaked out by malicious attacks using a software vulnerability. 

クラウド上における仮想化技術（Virtual Machineやコンテナ）の発展により，複数のVMやコンテナを組み合わせてサービスを構築することが一般的になってきています．一方で，このような仮想化技術に基づいたサービスの形態に適応したサービスの耐故障化技術の研究開発も同様に求められています．

本研究では，複数の仮想化サーバにおけるチェックポイント機構の実装，仮想化サーバ向けのチェックポイントアルゴリズムの開発，それに基づくスケールアウトやサーバマイグレーションの実現と性能評価を行っています．