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Despite much recent research on peer-to-peer (P2P) protocols for the Internet, there have been relatively few practical protocols designed to explicitly account for Network Address Translation gateways (NATs). Those P2P protocols that do handle NATs circumvent them using relaying and hole-punching techniques to route packets to nodes residing behind NATs. In this paper, we present Croupier, a peer...
In this paper we propose a new hybrid architecture between client/server and P2P network architectures in order to provide better service quality to the end-user. To distribute and protect the content, we use a discrete geometry tool as the Finite Radon Transform (FRT) in a Maximum Distance Separable (MDS) fashion. The presented results clarify the interest of the proposed architecture in terms of...
When a live streaming video is delivered over a peer-to-peer (P2P) network, the chunk delay is always a problem of great concern. A serious chunk delay can produce obvious discontinuity of the streaming video, resulting in low satisfaction of the service. Video on P2P is divided into several chunks and distributed to the peers. Each chunk has its own playback time deadline. The playback time of a...
Increase in the number of audiences interested in watching live events through the internet has become a challenge for traditional client-server approaches. In fact, supporting manifold audiences requires that broadcasters allocate more bandwidth. P2P networks for live streaming allow the users to support video dissemination by contributing their resources. Consequently, P2P networks are effective...
The Multimedia Information Retrieval (MIR) in the P2P networks has been widely studied. In this paper, we propose a new comprehensive similarity function to calculate the similarity of peers in the P2P networks so as to classify these peers. We also apply the relevance feedback in the process of retrieval in order to improve the speed and accuracy of retrieval. In simulation, we compare our algorithm...
This paper presents a multi-layered and multi-grouped model for P2P networks (MLG-P2P) whose overall architecture is a mixed P2P network. According to different requirement levels of security, MLG-P2P divides a P2P network into multi layers and creates peer groups in each layer, then builds the boundaries of resource sharing by groups, achieves trust assessments by layers, and adopts different security...
Over the years, peer-to-peer networks have emerged as one of the most popular file sharing medium over The Internet, capable of providing user anonymity to the clients if desired. However, modern P2P networks suffer from the bane of malicious entities we refer to as Sybils, which forge multiple identities to negatively influence or even control the entire network. This paper suggests a novel solution...
In current live Peer-to-Peer (P2P) streaming systems, buffering delay is too large compared with the channel switching delay of traditional TV service provided by cable companies. In this paper, network coding is applied to a live P2P streaming system to minimize the buffering delay that users experience. A new scheduling algorithm is designed, with server-push mechanism and intelligent method for...
Video-on-Demand (VoD) services are attractive but also expensive even after the participation of P2P networks. To achieve cost reduction, this paper proposes two mechanisms to enhance the contribution of P2P networks, i.e., storage compression and micropayment. The former greatly magnifies the storage capacity of peer nodes, while the latter establishes an effective user incentive for VoD services...
Traffic engineering and an economical provisioning of bandwidth is crucial for network providers in times of high competition in broadband access networks. We investigate the efficiency of caching as an option to shorten end-to-end paths and delays while at the same time reducing traffic loads. The portion of HTTP based distribution of cacheable content on the Internet is increasing in recent time...
In Peer-to-Peer (P2P) networks a malicious peer can control the direction of the traffic after it controls lots of bots. This paper focus on defending Distributed Denial of Service (DDoS) attack in P2P networks by selecting the most active peer with its credit values which is recorded in a period of Credit Construction time. The Credit values can be updated in the lest period. We propose Scheduler...
As a means of resources sharing, peer-to-peer (P2P) networks are currently receiving much attention. However, the open and anonymous nature of P2P networks also paves the way for malicious users to abuse the systems such as disseminating of inauthentic files or even viruses. To counter such menacing vulnerabilities in P2P networks, this paper presents a reputation-based approach that combines personal...
The volume of P2P application traffic has increased so much that network-operator-driven traffic control techniques such as P4P for localizing the P2P traffic are recently proposed. The gist of the existing approach is that the network operators provide traffic and topology information as a guidance to peers so that P2P traffic will flow as the network operators intend, thus, realizing unilateral...
Peer-to-Peer (P2P) file sharing applications have dramatically increased in popularity for the past few years. Although a P2P file sharing network shares many files, it does not usually have a management and control mechanism for the files exchanged. Consequently, copyright infringement and malware propagation in P2P file sharing networks have become prevalent. In order to prevent these file distribution,...
Peer-to-Peer (P2P) networks are widely used in today's Internet. Researchers claim that churn could bring down the performance in p2p networks. AS churn is an inherent character. Researchers want to find some ways to keep down. We investigate this in another point of view, from the searching aspect, churn can bring up search efficiency for repeated search. In this paper, we build a novel peer to peer...
The Minimum Spanning Tree (MST) problem is one of the most popular and important problems in the research area of distributed computing and networks. Contrary to the theoretical models where we usually have a global knowledge of all nodes and the corresponding distances for MST construction, in a realistic network (e.g., Internet) a node always has to rely on local knowledge only, that is it neither...
Over the last years many technological advances were introduced in Internet television to meet user needs and expectations. However due to an overwhelming bandwidth requirements traditional IP-based television service based on simple client-server approach remains restricted to small group of clients. In such situation the use of the peer-to-peer overlay paradigm to deliver live television on the...
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...
In Peer-to-peer (P2P) IPTV networks, jitter rate is one of the most important metrics for Quality of Service. In this paper, we develop a new approach to estimate jitter rate during playback. Unlike traditional approaches that focus on the download speed, our method relies on the distribution of peer download latencies. We demonstrated how to apply the proposed methodologies in a real-life environment...
Peer-to-peer (p2p) networks have gained immense popularity in recent years and the number of services they provide continuously rises. Where p2p-networks were formerly known as file-sharing networks, p2p is now also used for services like VoIP and IPTV. With so many different p2p applications and services the need for a taxonomy framework rises. This paper describes the available p2p applications...
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