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This paper proposes an indoor positioning system based on the iBeacon framework. The proposed positioning scheme is a path loss method which uses the coordinate of transmitters in estimating the receiver's coordinate. To effectively reduce the measurement error due to reflected waves, we introduce a technique to represent the region at which the receiver is likely to exist by using the superposition...
Recently, the sharing of editable files has been widely used in many applications such as online storage and collaborative file editing. In this paper, we propose a consistency maintenance scheme for such a file sharing in heterogeneous P2P systems. The key idea of the proposed scheme is to construct a static tree for each shared file to efficiently propagate the update information to all peers holding...
This paper studies the load balancing problem in distributed systems designed for massively multiplayer online role-playing games (MMORPGs). More concretely, we consider a distributed system of master-worker type in which each worker is associated with a particular region in the game field, and propose a scheme to balance the load of workers as much as possible. The basic idea of the proposed scheme...
In this paper, we propose a hybrid Peer-to-Peer (P2P) architecture for Content Delivery Networks (CDNs). The basic idea of the proposed method is to prepare a P2P overlay for each Autonomous System (AS) and to map nodes to the P2P overlays by referring to the information maintained by the DNS server deployed by the system. The performance of the proposed scheme is evaluated by simulation. The result...
In this paper, we propose a new consistency maintenance scheme for P2P file sharing systems which allow end-users to update shared files. The basic idea of the proposed scheme is to construct a static tree for each file to efficiently propagate the update information to all replica peers. The link to the root in a tree is acquired by referring to a Chord ring which registers the mapping from the set...
In this paper, we propose a distributed scheme to realize a quick update of the AOI (Area Of Interest) of players participating in a MMORPG. The basic idea of the proposed scheme is to dynamically adjust the number of master peers in each region using a threshold-based merge and split mechanism, where region is a part of the game field obtained by statically partitioning it. The result of simulations...
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