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This paper presents a two-level architecture for semantic P2P service discovery, which not only supports functionality-based service discovery but also provides flexible management mechanism for domain ontology. At the first level, a backbone is constructed on the basis of a category ontology, and the management task of domain ontology is distributed to the backbone peers on a per category basis....
Service composition is becoming a hot research point in recent years, especially in distributed peer-to-peer (P2P) network. However, how to guarantee the high-quality composition service performance becomes the key technology and difficulty in P2P network, which draws lots of attention in computer research field. According to the characteristics of distributed network, an adaptive service composition...
This paper establishes a stochastic activity network model for P2P file-sharing, to evaluate the quality of service provided. Key characteristics taken into account include the reputation scheme applied, the number of peers, fraction of malicious peers, peer churn and end-users' behavior. The results show that reputation schemes influence the quality of service significantly. Based on the findings,...
The Hybrid CDN-P2P architecture, or HCDN, which combines the complementary advantages of CDN and P2P networks, has been proposed to reduce the deployment cost and to improve the quality of service in file sharing and video streaming applications. A replica placement algorithm (RPA) decides where to replicate the specific data. Existing RPAs for pure CDN do not work efficiently in the HCDN architecture...
A trust model for P2P network is proposed in this thesis, namely CRM, a cluster and recommendation based multi-granularity trust model. Compared to the current trust model, some problems can be solved better, for instance, these disadvantages contain great costs due to iterative calculations, and security such as disguise, slandering caused by anonymous and open characteristics of P2P networks. The...
As smarter mobile devices are increasingly adopted by the wider public, to access more diverse applications, the question of who to trust while on the move becomes a crucial one. When operating within ad-hoc type mobile networks, a trust framework is the logical solution to provide ways to distinguish the most trustworthy neighbours. This promotes reliable information transfer, promotes the use of...
In this paper, we present a framework to facilitate reputation-based service selection with reputation management, which has three key features. First, we use a structured overlay network as the decentralized service repository system for improved efficiency. Second, we propose an adaptive QoS-aware service discovery approach. Then, we present a service-oriented distributed reputation assessment algorithm...
Cooperation has played a key role for good service performance in P2P network. However, without a proper incentive mechanism such cooperation cannot be maintained because nodes avoid spending their resources to share files. In this paper, we employ evolutionary game theory to analyze the dynamic evolutionary process of the mechanism. The game models are constructed based on the stag hunt game (SHG)...
In order to improve the scalability, reliability and stability of the semantic Web service composition system, and to achieve ontology-based semantic Web services composition efficiently, this paper presents a P2P-based Semantic Web services (P2PSWS) composition system architecture. This architecture combines the advantages of centralized and decentralized structures. It distributes the functions...
A large number of works have been made to apply P2P techniques into services discovery. However, most of them only focus on matching the functional properties and ignore the non-functional properties. With a wide variety of services are offered that can satisfy the functional requirements, a policy is needed to support users to obtain the rank of the located services according to their nonfunctional...
Though widely accepted as a key building block for next-generation large scale decentralized systems, the lack of flexibility of DHTs on efficient non identifier-based lookups is a well-known problem. In this paper, a resource discovery service that tackles the issues identified in a decentralized and distributed DHT-based caching architecture for media content distribution is presented. In the proposed...
Multicast technology introduces a number of new applications; meanwhile, it reduces the congestion of the network and releases the burden of the server. Those characteristics, such as reducing the occupied bandwidth, reducing server load, improving the quality of data transmission, are especially applicable to the needs of large bandwidth multimedia applications such as audio, video. This new technology...
A fundamental problem that confronts SOA-based CSCW applications is the efficient and timely QoS information obtainment of component services. However, this issue has largely been overlooked. This paper presents a P2P based publish/subscribe service to disseminate new revised QoS information reliably and efficiently. Specialized rendezvous points and a replica mechanism are introduced to reduce the...
Providing continuous on-demand streaming services with VCR functionality over ubiquitous environments is challenging due to the stringent QoS requirements of streaming service as well as the dynamic characteristics of both underlying network and user behavior. In this paper, we propose SkipStream, a skip graph based peer-to-peer (P2P) on-demand streaming scheme with VCR support to address the above...
The peer-to-peer paradigm shows the potential to provide the same functionality and quality like client/server based systems, but with much lower costs. In order to control the quality of peer-to-peer systems, monitoring and management mechanisms need to be applied. Both tasks are challenging in large-scale networks with autonomous, unreliable nodes. In this paper we present a monitoring and management...
Due to the existence of hubs in P2P networks, the network becomes more and more vulnerable because of great reducing in defending against coordinated attacks. This paper propose a model based on trust value of nodes against vulnerability, which not only takes into account the node's connections, but also gives full consideration about the node's trust value, and the calculation of trust value is broken...
Due to fuzzy logic can help in handling the imprecise nature and uncertainty of trust, some papers use several fuzzy logic methods(such as fuzzy inference and fuzzy comprehensive evaluation) to tackle trust modeling for P2P-based system. However, nobody summarizes difference of these fuzzy logic methods. In this paper, authors present a general fuzzy trust problem domain for P2P-based system, and...
Recent studies indicate that the Internet-related energy consumption represents a significant, and increasing, part of the overall energy consumption of our society. The largest contribution to this consumption is due to Internet edge devices. Typically, users leave their PCs continuously on for satisfying the connectivity requirements of file sharing P2P applications, like BitTorrent. In this paper...
The following topics are dealt with: cloud computing; resource management; P2P networks; distributed storage; delay assurance; data security; wireless networks; QoS routing; TCP; and service management.
Peer-to-Peer (P2P) networks have proven to enable large-scale content distribution over the Internet thanks to peers organization in overlays. However, real-time content delivery such as live and video on demand (VoD) streaming applications requires significant consideration in term of peer organization to provide concurrent users with adequately satisfying viewing experiences. In this paper, we present...
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