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In this paper, we propose a fully distributed VPN system over peer-to-peer(P2P) network called Everywhere Local Area network (ELA). ELA enables to establish private overlay network for VPN among nodes of a group without any servers. As opposed to the existing VPN systems, nodes of a group can build VPN without setting up a VPN server, and there is no(More)
In this paper, we advocate the problem of reusing Multiplayer Online Game (MOG) in Client-Server (C/S) architecture. The problem is that MOG services cannot continue to be provided because of high maintenance cost for operating game servers. Additionally, it is caused by the decreasing service users who getting tired of the game and game providers who have(More)
This paper describes the design, implementation, and evaluation of a proximity-based dynamic path shortening scheme, called DPS. In DPS, active route paths adapt dynamically to node mobility based on the "local" link quality estimation at each own node, without exchanging periodic control packets such as Hello packets. Each node monitors its own local link(More)
A demonstration experiment called “Timely & Timely” was a evaluation of a system in which ubiquitous sensor's data and reporter's reports are displayed on digital signage and smart phones. This experiment was taken place at a shopping mall called “Lalaport Kashiwanoha” in Chiba, Japan. We have designed and implemented an(More)
This paper proposes a new practical packet scheduling scheme for wireless LANs called SoCPS and also explores extensively the effectiveness of wireless packet scheduling under a variety of conditions over an actual wireless LAN. One well-known aspect in packet scheduling at the base station is consideration of channel state dependency. In conventional(More)
This paper presents a novel effective scheme of configuring wireless personal area networks (WPANs), called master-driven connection control (MaCC). WPANs are based on a new wireless technology, which enables portable and mobile computing devices, and consumer electronic appliances to communicate with each other. Assuming that WPANs operate in a(More)