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Today's Internet is shifting towards a larger and smarter scenario known as the Internet of Things (IoT). The IoT envisions a multitude of heterogeneous objects and interactions with physical environments. In this environment, locating desirable services is challenging due to the considerable diversity, large number, dynamic behavior, and geographical distribution of the services provided by physical...
Wireless Mesh Networks represent a promising technology to provide wireless Internet connectivity over a large community. This new technology not only allows a fast, easy and inexpensive network deployment, but also enables many new applications including community-scale peer-based communication or sharing of network resources and services. In this work, we propose an effective publish/subscribe communication...
The availability of large volumes of Semantic Web data has created the potential of discovering vast amount of knowledge, among which semantic relation discovery fundamentally changes the way we acquire and use knowledge. Due to the decentralized and distributed nature of Semantic Web development, semantic data tend to be created and stored independently in different organizations; under such circumstances,...
Snapshot is usually applied in p2p network topology analysis. In this paper, we develop the topology crawler software to probe the PPLive application. Based on the measured trace, we characterize the PPLive topology with metrics including degree distribution, clustering coefficient, network diameter, characteristic path length, connectivity matrix and reciprocity coefficient. In additional, we also...
With the rapid growth of semantic Web, more and more semantic Web data are generated and widely used. Efficient search and management of the semantic Web data is becoming a very important issue. In this paper, we present semantic Web data indexing scheme over a fully decentralized P2P network. Ontological knowledge is decomposed into atomic elements and then indexed with a distributed hash table (DHT)...
This paper presents GOIDS (Grid Ontological Integration and Discovery System), a comprehensive architecture for resource sharing and discovery in large-scale grids, where nodes integrate local ontologies to expand semantic knowledge of shared grid resources. A peer-to-peer based ontological directory service is used to facilitate the formation of the semantic small-world ontological communities. Ontological...
Locating desirable resources is very important for a large distributed system. However, the distributed, heterogeneous, and unstructured nature of the system makes this issue very challenging. The discovering mechanism has to be not only semantically rich, in order to cope with complex queries, but also scalable to handle large numbers of information sources. In this paper, we address these problems...
Grid technologies enable the sharing of a wide variety of distributed resources. To fully utilize these resources, effective resource discovery mechanisms are necessities. However, the complicated and dynamic characteristics of grid resources make sharing and discovering them a challenging issue. In this paper, we propose a peer-to-peer (P2P) based overlay network to assist the efficient resource...
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