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Streaming services have grown rapidly in the last few years and providers of video on-demand, such as Netflix or YouTube, are increasing the number of users even more quickly. The majority of these companies implement their services using huge Content Delivery Networks that are as much powerful as expensive, e.g. Amazon and Akamai. In this paper we propose a hybrid CDN/P2P solution that aims at reducing...
Live streaming distribution services have spread as one of the most popular services. The technique of creating contents has been developed, and users can use it easily. Accordingly, the number of contents rapidly increased. In the existing content distribution system, users must select an interesting content from a large amount of contents in the Internet. It takes long time to find out the most...
Active network measurements play an important role not only in network monitoring for OAM purposes, but also in assessing the current network status and providing real-time information for the optimization of applications. This paper proposes the extension of SNMP-based monitoring mechanisms to also support active in-network measurements conforming to the standardized OWAMP protocol. A specialized...
Using a decentralized content distribution scheme is appealing when considering the potentially enormous amount of data generated by high quality video on demand (VoD) services. There is, unfortunately, little information available about which form of content delivery would yield maximum benefit and how it should be configured to achieve that, given a certain cost structure and request distribution...
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...
Peer-to-Peer (P2P) network structure is widely employed for video streaming applications due to its high stability, flexible extensibility and ability to share data stream loading among different peer nodes. This paper proposes an interleaved video frame distribution (IVFD) scheme to resourcefully support full VCR functionalities in P2P environment without searching new source. Instead of acquiring...
Data request task scheduling is one of the important issues for P2P VoD systems. However the existing data scheduling strategies in P2P VoD system is not fair enough. They make many nodes, which upload data actively, bear very heavy load, while those selfish nodes providing no resource sit idle. This paper presents an admission control strategy on serving nodes combining with the incentive mechanism...
Caching consistency in a MANET environment is an important issue as it is directly related to MANET connectivity. However, existing cooperative caching schemes mostly focus on delta and/or weak consistency. Recently, RPCC was proposed, but it cannot overcome traditional PUSH and PULL methods in terms of ensuring a strong consistency. In this paper, we propose three algorithms that are based on the...
Most home computers have upload bandwidths that do not allow them to stream good quality video. As a result, they cannot fully participate in peer-to-peer video streaming solutions. We propose to address that issue by letting these clients use the storage space they have on one or more remote servers. Each time a client plays a streaming video, it will upload a copy of that video to one of these servers...
Using Peer-to-Peer (P2P) overlay networks have become a progressively popular approach for streaming live media over the Internet due to their deployment simplicity and scalability. In this paper, we propose a new hybrid push-pull live P2P video streaming protocol called PPM that combines the benefits of pull and push mechanisms for video delivery. Our main goal is to minimize the network end-to-end...
Vehicular network is different from wired network due to its network environment changes rapidly. The connection lifetime between vehicles is usually short because vehicles move in high speeds. Hence, deploy peer-to-peer (p2p) applications over vehicular network is a challenging research issue. There are many problems confronted in p2p file sharing, e.g. how to search files effectively, how to share...
Small playback lag in live streaming is important for time-critical and interactive applications such as live stock, market updates, sports and remote education. In this paper, we present Elite addresses the playback lag problem in peer-assisted live streaming systems. Instead of deploying a large initial offset to all the users, Elite seeks the possibility of initializing users with layered proportional...
Recently, Peer-to-Peer (P2P) based multi-party video conference systems have been widely deployed. However, those solutions suffer from high cost when multiple users simultaneously distribute video streams to receivers. Most existing systems only support up to a dozen of users at the same time. In this paper, we propose a novel approach to construct and manage a heterogeneous P2P network for scalable...
Three stakeholders come into play in peer-to-peer (P2P) video-on-demand (VoD), namely peers/viewers, content providers and ISPs. Different design choices have been proposed to improve quality of user experience, to bring down content server bandwidth cost and to reduce ISP-unfriendly traffic. However, it is unclear whether the ability of these design choices to meet interests of one stakeholder comes...
Very often, network users expect to access services relevant to their locations, whilst preserve their privacy without disclose their exact locations. The well-known privacy preserving method is the spatial cloaking technique where exact user locations are blurred into a cloaked region to meet the privacy requirement, e.g. k-anonymity. Most of current solutions are designed with a centralized architecture...
Video multicast is an important application for P2P networks, which can benefit from the load repartitioning and large scale distribution properties they offer. In this context, the Orchard algorithm was developed in 2007, with an aim to build a P2P system meeting video multicast requirements. However, Orchard suffers from a slow overlay construction and a potentially high end-to-end delay. In this...
In this paper, we propose a new kind of P2P traffic control technique, called Netpherd exploiting the peer selection adaptation (i.e., preferring peers who are likely to provide better performance). Netpherd tries to enable the peers to communicate with the peers of the local domain by manipulating network performance (i.e., adding an artificial delay to the inter-domain traffic) at network device...
Traditional multiparty audio or video conferencing uses a single node, sometimes called a multipoint control unit, or MCU, to mix audio data for the conference. We introduce a novel mixer, called a Virtual Mixer, which performs mixing in a distributed way over the network. The Virtual Mixer topology is optimized over Steiner trees using a metric of either average pairwise delay (APD) or maximum pairwise...
Locality-Sensitive Hashing (LSH) is a well-known approximate nearest-neighbor search algorithm for high-dimensional data. Though LSH searches nearest-neighbor points for a query very fast, LSH has a drawback that the space complexity is very large. For this reason, so as to apply LSH to a large dataset, it is crucial to implement LSH in distributed environments which consist of multiple nodes. One...
Online forums have long since been the most popular platform for people to communicate and share ideas. Nowadays, with the boom of multimedia sharing, users tend to share more and more with their online peers within online communities such as forums. The server-client model of forums has been used since its creation in the mid-1990s. However, this model has begun to fall short in meeting the increasing...
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