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.
Video-on-demand (VoD) is a rapidly growing method for viewing and sharing video content over the Internet. However, video on demand consumes a significant amount of bandwidth, forcing content publishers and content delivery networks to examine approaches such as the use of peer-to-peer (P2P) technologies to assist in video distribution. We study the performance impact of a peer localization strategy...
Over the years of the emergence of peer-to-peer systems a phenomenon named 'Free Riding' has affected its performance and become a serious threat to be resolved. Free riding phenomenon was first felt in the study of Gnutella. As the number of free riders increases, the performance of the overall system decreases as free riders use resources without giving anything to the system. To solve the problem...
One of the main challenges of unstructured peer-to-peer (P2P) systems that greatly affects performance is resource searching. The early proposed mechanisms use blind searching, but they have a lot of shortcomings. Informed search strategies have better performance in comparison with blind ones, but they still suffer from low success-rates and long response times due to their inadaptability to dynamic...
In the area of network performance and discovery, network tomography focuses on reconstructing network properties using only end-to-end measurements at the application layer. One challenging problem in network tomography is reconstructing available bandwidth along all links during multiple source / multiple destination transmissions. The traditional measurement procedures used for bandwidth tomography...
Peer to Peer (P2P) computer networks rely on direct connections between participants instead of conventional centralized resources. These networks are useful for many purposes, but the killer application nowadays is file sharing. BitTorrent is a very popular protocol for this matter. In this paper, we use a multi-agent model of a BitTorrent network. In it, each BitTorrent client is an agent that interacts...
In recent years, there has been an increasing interest in P2P (Peer-to-Peer) streaming environments. There are various types of streaming contents. One of them is a content that can be separated into model and motion data like CG animations. The interruption times that occur during playing the data can be reduced by considering the time to start playing each type of data. However, previous researches...
Peer to Peer (P2P) computer networks rely on direct connections between participants instead of conventional centralized resources. These networks are useful for many purposes, but the killer application nowadays is file sharing. BitTorrent is a very popular protocol for this matter. In this paper, we use a multi-agent model of a BitTorrent network. In it, each BitTorrent client is an agent that interacts...
Current trends show an increasing number of Dedicated Channels having a Small number of Viewers (DCSV for short) in multi-channel live streaming systems. Usually, DCSV channels are either user generated or dedicated channels and they suffer adversely from poor channel performance, mainly, due to having a small number of participants. As a result, when a viewer explicitly requests for a block of streaming...
Success rate, query hit rate and speed of search are some common metrics for evaluating p2p search algorithms. Yet, these metrics do not consider properties of discovered sources and their impact on download performance. A requesting peer is interested in stable serving peers with high upload bandwidth to minimize its download time and therefore, this is the superiority of a search algorithm to find...
Lower echelon forces face significant barriers in utilizing increasingly available networked resources. Network access at the tactical edge continues to present significant problems of limited bandwidth, disruption, and other constraints. Simultaneously, there is an ever-increasing set of video streams, imagery, intelligence, and live reports available on both tactical edge and upper echelon networks...
Solutions to the cellular network bandwidth problem have been presented by the community such as usage of alternative wireless (e.g., 802.11 WiFi) network and peer-to-peer (P2P) file sharing over a group of wireless devices. However, often the theoretical and simulation approaches for file sharing within multi-radio P2P groups hide the complexity of systems and networks in real scenarios such as heterogeneity...
We propose a mathematical framework for the optimal design of a video on-demand (VoD) application under regime. Peers join the network following a poissonian process, download progressively one or possibly many concurrent video contents, and abort the system when they wish. The system is supported by static servers managed by the operator, called super-peers, and the altruism of peers, that upload...
One highly-scalable approach to content delivery is to harness the upload bandwidth of the clients. Peer-assisted content delivery systems have been shown to effectively offload the servers of popular files, as the request rates of popular content enable the formation of self-sustaining torrents, where the entire content of the file is available among the peers themselves. However, for less popular...
BitTorrent is the most widely used Peer-to-Peer (P2P) protocol and it comprises the largest share of traffic in Europe. To make BitTorrent more Internet Service Provider (ISP) friendly, BitTorrent Inc. invented the Micro Transport Protocol (uTP). It is based on UDP with a novel congestion control called Low Extra Delay Background Transport (LEDBAT). This protocol assumes that the receiver always gives...
Various peer-to-peer architectures for Massively Multiplayer Online Games have been proposed in the last decade in an attempt to reduce host server traffic and processing requirements. This paper proposes a middleware plugin that will transform the game's network into a hybrid model in an attempt to distribute a portion of server tasks amongst the client machines. The middleware will appear as transparent...
A novel Internet content distribution service Offline downloading service has emerged recently and attracted a large number of users all over the world. Unlike traditional Internet content distribution systems such as Bittorrent (BT), Offline downloading service uses dedicated cloud unities (Cache cloud) to store files what users wish to download and provide uploading, in order to guarantee file availability...
In order to solve the Fault-Tolerant problem of the cloud storage system, the stream regeneration with regenerating codes is proposed. The stream regeneration is based on the regenerating codes with pipelined regeneration which evolves from regenerating codes theory. Stream regeneration extends the pipelined regeneration. It was proved that with the same participating nodes, the total amount of network...
Nowadays airborne network is becoming more and more complex. Traditional centralized or weakly distributed network managing solution could not quite fit the complex network for the lack of bandwidth efficiency. Recently, strongly distributed and cooperative network managements have emerged, which could achieve a better performance. However, they have a much higher requirement on managers, and it is...
In the last decade, numerous structured overlay networks were proposed as a scalable infrastructure to build large-scale distributed systems under dynamic environments. These overlays were touted to be fault-tolerant and self-managing, yet, as we show in this paper, they fall short of handling some extreme scenarios they envision. These scenarios include bootstrapping, and underlying network partitions...
Video Surveillance Services is increasingly becoming important part in daily live. For traditional distributed Video Surveillance Services, each video catcher will store its streaming data to server. It will create a great volume of data daily. The approach obviously incurs some problems in keeping daily data into the data center (DC), such as limited bandwidth to DC, limited space of DC, overloading...
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.