Modeling chunk availability in P2P swarming systems

Menasché, Daniel Sadoc; Rocha, Antônio Alencar; Silva, Edmundo de Souza e; Leão, Rosa M. M.; Towsley, Don; Venkataramani, Arun

doi:10.1145/1639562.1639573

Cited by 6 publications

(3 citation statements)

References 7 publications

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“…The proxy gateway can assist other HNDs in avoiding long downloading processes and fast energy drain. Second, due to peer swarming [17], P2P downloading leads to numerous connections and sessions that HNDs must manage simultaneously. This situation is impractical to most HNDs that are based on embedded systems with limited resource and service capabilities.…”

Section: Design Considerations and Requirementsmentioning

confidence: 99%

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A P2P-to-UPnP Proxy Gateway Architecture for Home Multimedia Content Distribution

Hu¹

2012

KSII TIIS

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Deploying advanced home networking technologies and modern home-networked devices in residential environments provides a playground for new home applications and services. Because home multimedia entertainment is among the most essential home applications, this paper presents an appealing home media content sharing scenario: home-networked devices can discover neighboring devices and share local media content, as well as enormous amounts of Internet media content in a convenient and networked manner. This ideal scenario differs from traditional usages that merely offer local media content and require tedious manual operations of connection setup and file transfer among various devices. To achieve this goal, this study proposes a proxy gateway architecture for home multimedia content distribution. The proposed architecture integrates several functional mechanisms, including UPnP-based device discovery, home gateway, Internet media provision, and in-home media content delivery. This design addresses several inherent limitations of device heterogeneity and network interoperability on home and public networks, and allows diverse home-networked devices to play media content in an identical and networked manner. Prototypical implementation of the proposed proxy gateway architecture develops a proof-of-concept software, integrating a BitTorrent peer-to-peer client, a UPnP protocol stack, and a UPnP AV media server, as well as media distribution and management components on the OSGi home gateway platform. Practical demonstration shows the proposed design and scenario realization, offering users an unlimited volume of media content for home multimedia entertainment.

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Section: Design Considerations and Requirementsmentioning

confidence: 99%

“…As Fig. 3-(a) shows, peer swarms in P2P systems result in wide-area communications on the Internet [17]. Downloading P2P media files undergoes long communication latency and expends network resources.…”

Section: Design Considerations and Requirementsmentioning

confidence: 99%

A P2P-to-UPnP Proxy Gateway Architecture for Home Multimedia Content Distribution

Hu¹

2012

KSII TIIS

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“…This work addresses the impact of P2P distribution when the delay of the play is out of the limit, as it must be in any true live TV service [10]. Chunk availability varies as a function of the number of users in the system [11]. The bandwidth heterogeneity among peers can be exploited to significantly improve the delay performance of all peers [12].…”

Section: A1 Perceptual Discontinuity: Delayed Chunkmentioning

confidence: 99%

Reducing Perceptual Discontinuity P2P Live Video Streaming Using Adaptive Scheme Based on Frame Loss Visibility

Christanto¹,

Miaou²,

Lin³

2011

ijeei

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When a live streaming video is delivered over a peer-to-peer (P2P) network, the video is divided into several chunks and distributed to peers. Each chunk has its own playback time deadline. A chunk delay can be a problem of great concern because a serious chunk delay can produce obvious discontinuity of the streaming video, resulting in low satisfaction for a viewer. The playback time of a delayed chunk is overlapped with that of the next chunk. Traditionally, fast forwarding and uniform frame skipping are the two methods used to deal with the chunk delay problem. However, they may easily produce the effect of perceptual discontinuity and perceived by the viewer. This study proposes a frame dropping method based on frame loss visibility information in order to maintain visual continuity of the video. The frame with lower loss visibility will be dropped first. In a previous work, the idea of loss visibility was applied by a router to develop a frame dropping strategy when network congestion occurs. In this work, we apply it to the chunk-level playback controller in P2P network. The number of frames to be dropped is dependent on the value of chunk delay. Given a fixed chunk delay, the main difference between the proposed approach and the uniform frame skipping method is the way of choosing frames for dropping (fast forwarding method does not drop any frame but play all the frames at a faster speed). A viewer's satisfaction is evaluated by using the way of subjective video quality assessment. The proposed method can produce higher MOS (mean opinion score) than that of the traditional methods (fast forwarding and uniform frame skipping), demonstrating the effectiveness of the proposed approach.Keywords: Video streaming, P2P networks, perceptual discontinuity, frame loss visibility. IntroductionDelivering multimedia data over a peer-to-peer (P2P) network receives more and more demand. P2P downloads data files in a parallel manner from other peers rather than from a single data transfer node in the client server topology. The file transferred by a P2P system is divided into several chunks. The system distributes the chunks to the peers who are interested in the chunks. The peers are coordinated to achieve the goal of file exchange. In the P2P system, a seeder is known as a peer that already has the complete file and it can give the chunks of file to other peers. In contrast, a peer that still needs some chunks from other peers is called a leecher. Video chunk is not just used for local consumption (with playback time deadline), but also for uploading to other peers.The network impairment to video playback in P2P streaming is rarely packet loss, but only delayed chunk. In this study, we propose a method based on data loss visibility to reduce the bad perceptual effect associated with the chunk delay problem. We propose a video playback design to improve the viewer's satisfaction in visual quality whenever the delay chunk problem occurs. We evaluate the video quality resulted from each method by conducting a s...

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