The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In Peer-to-Peer (P2P) networks if adversaries such as Sybil attackers have got most identities in the network, they will control routing table or traffic. In this paper, we propose a framework based on two complementary techniques to defense malicious node after they transmit data to other malicious peers instead of honest peers. The first approach, based on behaviors of destination nodes, is used...
Massive Multiuser Virtual Environments (MMVEs) and especially the idea of a ''3D Web'' as a combination of a MMVE and today's WWW currently attracts a lot of attention. The realization of such a vision on a global scale though poses severe technical challenges to the underlying network infrastructure. It is generally accepted that such a global scale scenario can only be realized in a distributed...
In this paper, we present the system design and evaluation of a space filling curve (SFC)-based P2P information discovery system OID. The OID system uses multiple SFCs to significantly optimize the performance of multi-attribute range queries, particularly for applications with a large number of data attributes where a single big SFC-based index is inefficient. The basic idea is to have multiple SFC...
In traditional agreement protocols, multiple processes just aim at agreeing on one value out of values shown by the processes. In meetings of human societies, agreement procedures are often used and are so flexible that persons can change their opinions and can use various types of agreement conditions like majority-condition. We discuss a flexible agreement protocol of multiple peers by taking into...
Peer-to-peer networks are an increasingly popular solution for the distribution of media content to a large number of users, with limited investments for network infrastructures. The distribution of a real time video stream imposes strict performance requirements such as small playback delays and few frame losses. In this paper, we focus on peer-to-peer video streaming systems with tree or forest...
Peer-to-Peer systems have become a substantial element in computer networking. Distributing the load and splitting complex tasks are only some reasons why many developers have come to adopt this technology. However, all of them face a severe problem at the very beginning: setting up an overlay network, such that other clients can easily join it. With an empty peer cache common bootstrapping methods...
In order to ease the development and maintenance of more complex P2P applications, which combine multiple P2P functionality (e.g. streaming and dependable storage), we suggest to extend structured P2P systems with a dedicated information management layer. This layer is meant to generate statistics on the whole P2P system and to enable capacity-based peer search, which helps the individual functionality...
In a peer-to-peer (P2P) system, multiple peer processes issue transactions to manipulate objects. A transaction issued by a process is assigned with a subfamily of roles named purpose, which are granted to the process. If a transaction reads an object o1 and then writes another object o2, information in o1 might flow into o2. Suppose a transaction T1 with a purpose R1 precedes another transaction...
The general craze for virtual environments, the potential of augmented reality applications and the announced revolution of the Internet world (Web 2.0, Web 3D.0) are key points for the emergence of an 'ambient' Web which will make it possible for users to communicate, collaborate, entertain, work and exchange content. In this context, content storage, delivery, and reproduction are among the essential...
In peer-to-peer (P2P) networks, how to efficiently locate data on distributed hash tables (DHTs) is challenging and has attracted much research attention in recent years. Two measurements are usually considered when discussing the efficient location of data items: the path length (the hop count for resolving a lookup request on the overlay network)and the latency (the actual time period between the...
Many software projects are developed by globally distributed teams. The nature of the peer-to-peer paradigm fits to such an application scenario. However, existing tools to support developer require a central instance, like it is the case in version control, which is crucial for software development. This paper address the challenges version control faces in a purely peer-to-peer environment and presents...
We collected packet traces from second life client sessions and analyzed the packet contents. We observed that textures constitute a majority of the network traffic. We further characterized the textures from three selected regions in second life in terms of their size and spatial distributions. We found that textures in these regions exhibit a different size distribution from files on a file system...
Efficiently discovering services in terms of diversified service constraints in a dense MANET is a challenging issue. This paper proposes to build a distributed suffix tree on backbone nodes as XML-based services?? index to provide a concise profile for service descriptions. Moreover, a content-addressable P2P overlay and corresponding fault-tolerance mechanisms are introduced to support the distributed...
Most social networks exhibit community structures, in which nodes are tightly connected to each other within a community but only loosely connected to nodes in other communities. Researches on community mining have received a lot of attention; however, most of them are based on a centralized system model and thus not applicable to the distributed model of P2P networks. In this paper, we propose a...
SIP (Session Initiation Protocol) is a signaling protocol widely used in multimedia communication. Recently, P2PSIP (Peer-to-Peer SIP), which combines DHT (distributed hash table) and SIP, has been proposed to overcome the drawbacks of traditional CS SIP (client/server architecture SIP). However, the introduction of DHT increases the registration overhead and, session setup overhead/latency. These...
Peer-to-peer file sharing applications are major proportion of traffic in Internet. Among P2P file sharing applications, BitTorrent is known to be the most popular system, in which peers can download pieces of file proportional with upload bandwidth shared with others. Therefore, for such a system, bandwidth adjustment is very significant for peers. In this paper we aim at modeling this as a solution...
Personal Health (pHealth) sensor networks are generally used to monitor the well being of both athletes and the general public to inform health specialists of future and often serious ailments. The problem facing these domain experts is the scale and quality of data they must search in order to extract meaningful results. By using peer-to-peer sensor architectures and a mechanism for reducing the...
Peer-to-Peer (P2P) networks have been proposed as one promising approach to provide better scalability for Networked Virtual Environment (NVE) systems, but P2P-NVE also increases the probability of cheating by allowing users to manage the states of objects. In this paper, we propose Delaunay State Management (DSM), a P2P-NVE state management scheme that divides the whole virtual world into many triangular...
Peer-to-peer (P2P) live streaming systems gain a lot of attention recently. Among the various architectures, the gossip-based approach holds great potential and has been used in real systems. In a gossip-based P2P streaming system, peer nodes are grouped together to exchange pieces of the live stream with each other. Maintaining the group and pulling the streaming data from other peers incur nontrivial...
Peer-to-peer (P2P) architectures have recently become a popular design choice to build scalable Networked Virtual Environments (NVEs). While P2P architectures offer better scalability than server-based architectures, efficient distribution and management of avatar and object states remains a highly challenging issue. In this paper, we propose GROUP, a fully-distributed P2P architecture for NVEs that...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.