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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...
In recent years, BitTorrent traffic accounts for a substantial percentage of Internet traffic in the world. However, the current BitTorrent protocols disregards traffic cost at the underlying network and generate a large amount of inter-AS traffic. As a result, BitTorrent peers may suffer from slow download of files due to long delays. Moreover, ISPs may limit BitTorrent traffic to reduce inter-AS...
Many Internet users use P2P live streaming services which deliver live video contents to many users. In the services, the video content is sliced into small pieces called chunks. The peers not only receive but also send the chunks to watch the video contents. Source's load for delivering is reduced. In an Offer Select method, each peer offers sendable chunks to it's neighbors. The neighbors select...
Recently, it has been noted that the inefficiencies in peer-to-peer (P2P) overlay networks result in a large quantity of traffic among internet service providers (ISPs) or autonomous systems (ASes). To optimize cross-ISP/AS traffic, the existing approaches introduce network-aware strategies in which peers select geographically close peers as neighbors using topological information. However, each P2P...
Predictive methods for learning network distances are often more desirable than direct performance measurements between end hosts. Yet, predicting network distances remains an open and difficult problem, as the results from a number of comparative and analytical studies have shown. From an application requirements perspective, there is significant room for improvement in achieving prediction accuracies...
The IPv6 protocol is the next-generation IP protocol that addresses many of the shortcomings that exist in the IPv4 protocol. Some of the enhancements include increased address space, mandatory security and provisioning of stateless auto-configuration, a technique through which a new node forms its own address without the assistance of centralized host configuration servers operating in the network...
As the dominant Internet application, peer-to-peer (P2P) file sharing systems account for the major portion of Internet traffic, posing significant burden on ISPs. Many ISPs have attempted to discriminate against P2P traffic, making it important to alleviate such severe conflict. In this paper, we propose a novel architecture called iDTT that aims to use the underutilized off-peak time network capacity...
IPTV will be one of the main drivers of network innovation in the near future. Its bandwidth demands, especially if combined with HDTV, require smart algorithms for content distribution. One approach that is currently discussed intensively is Application Layer Multicast (ALM), which allows to scale to large node numbers by incorporating the resources of participating peers. In addition, locality-aware...
Mobile Ad-hoc Networks (MANETs) exhibit unpredictable topology with heterogeneous node contact rates, high mobility and limited information. When dealing with such challenging environments, the mobility model has a key role in testing the performance and proving the expected behavior of routing algorithms. While synthetic mobility models have been largely used to measure quantitative aspects of routing...
Most of Internet traffics are generated by peer-to-peer(P2P) file sharing applications. The main idea of P2P file sharing applications is that when a peer contributes a file with higher rate, the rate that the peer is able to download files from other peers will also be high. The mechanism works well in a bandwidth symmetric network. However, when a peer shares a large amount of files to other peers...
Push-pull hybrid schemes for peer-to-peer (P2P) video live streaming applications achieve a short playback delay and are robust in the presence of peer churn. Most hybrid schemes construct an overlay randomly, which causes unnecessary traffic on the Internet. Simply applying the neighbour-with-nearby-peers strategy can localize the traffic but results in a large tree height, more lost chunks, and...
Peer-to-peer file sharing techniques are efficient and popular ways to distribute network media contents. Aiming to improve the accessibility of media contents from mobile devices, we introduce peer-to-peer file sharing technique into delay tolerant networks (DTNs), which are formed solely by highly mobile devices and which distribute files utilizing the mobility of humans and vehicles. We first investigate...
Internet video and peer-to-peer television (P2P-TV) are attracting more and more users: chances are that P2P-TV is going to be the next Internet killer application. In recent years, valuable effort has been devoted to the problems of chunk-scheduling and overlay management in P2P-TV systems. However, many interesting P2P-TV proposals have been evaluated in an idealistic environment: in this work,...
There are two main scalable methods for streaming live video over the Internet: Content Delivery Networks (CDNs) and Peer-to-Peer (P2P) networks. Though both have their own problems, P2P streaming systems challenge delivering video with constant quality and CDNs approaches require deployment of large number of servers throughout the Internet that is costly. Recently, using hybrid architectures based...
With the advancement of Internet technologies and the widespread use of mobile devices, the number of users in conferencing services is increasing quickly. A P2PSIP conferencing system and an IP Multimedia Subsystem (IMS) conferencing system have been designed to provide conferencing services. The IMS conferencing system was developed to adapt to a server-based centralized system, while the P2P network,...
Recent advances in multimedia software and hardware technologies and the availability of high-speed Internet service have been instrumental for growth in the online gaming industry. Multiple servers distributed across the network are commonly used to provide the desired quality-of-service (QoS) for the network game in order to achieve a higher quality-of-experience (QoE) to the players (clients)....
This work presents an overlay multicast tree construction algorithm to support stable multimedia service over the Internet. While constructing a multicast tree, it takes into account not only the link delay, but also the peer stability. Since peers actually show dynamic and unstable behavior over peer-to-peer network, it is essential to consider the peer stability. Furthermore, the weighting factor...
Although IP multicast techniques were proposed a long time ago and despite of their advantages, they are still not widely deployed due to the absence of multicast support in some routers/domains and inter-domain management issues. On the other hand, in the most of recent internet applications, where the average consumed bandwidth is measured by hundreds of Kbits per second and where the support of...
Networking services are increasingly being provided by peer-to-peer service overlay networks (P2P SON), allowing service providers to cooperatively offer and run a flexible set of services. In this respect, the selection of peers is a key issue for improving resource usage and end users Quality of Experience (QoE). This paper presents an approach to best peer selection in a three-tier P2P SON architecture,...
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