Dedicated Disk I/O Strategies for IPTV Live Streaming Servers Supporting Timeshift Functions

Cheng, Huang; Zhu, Changfeng; Li, Yi; Ye, Dejian

doi:10.1109/cit.2007.181

Cited by 2 publications

(3 citation statements)

References 3 publications

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“…Several works have highlighted the problems met by timeshifted systems based on a centralized architecture [4][5][6]. New server implementations are described in [6].…”

Section: Introductionmentioning

confidence: 99%

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Peer-Assisted Time-Shifted Streaming Systems: Design and Promises

Liu

Simon

2011

2011 IEEE International Conference on Communications (ICC)

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Time-shifted streaming (or catch-up TV) allows viewers to watch their TV programs within an expanded time window. In this paper, we emphasize the challenging characteristics of time-shifted TV systems that prevent known delivery systems to be used. We model time-shifted TV as multiple-interval graph, then we present a Peer-Assisted Catch-Up Streaming system, namely PACUS, where a set of end users' computers assists the server for the content delivery. We show in particular how the PACUS tracker server can be efficiently implemented for catch-up TV. We demonstrate the benefits of PACUS by simulations. We especially highlight that PACUS reduces the traffic at the server side with the advantages of lightweight and self-adaptive unstructured peer-to-peer systems.

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“…Several works have highlighted the problems met by timeshifted systems based on a centralized architecture [4][5][6]. New server implementations are described in [6].…”

Section: Introductionmentioning

confidence: 99%

“…New server implementations are described in [6]. Cache replication and placement schemes are extensively studied by the authors of [4].…”

Section: Introductionmentioning

confidence: 99%

Peer-Assisted Time-Shifted Streaming Systems: Design and Promises

Liu

Simon

2011

2011 IEEE International Conference on Communications (ICC)

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“…New server implementations are described in [5]. Cache replication and placement schemes are extensively studied by the authors of [3].…”

Section: Introduction the Delivery Of Television Over The Internetmentioning

confidence: 99%

Distributed delivery system for time-shifted streaming systems

Liu

Simon

2010

IEEE Local Computer Network Conference

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To cite this version:Yaning Liu, Gwendal Simon. Distributed delivery system for time-shifted streaming systems. Abstract-In live streaming systems (IPTV, life-stream services, etc.), an attractive feature consists in allowing users to access past portions of the stream. This is called a time-shifted streaming system. We address in this paper the design of a large-scale delivery system for a time-shifted streaming application. We highlight the challenging characteristics of time-shifted applications that prevent known delivery systems to be used. Then, we describe the turntable structure, the first structure that has been specifically designed to cope with the properties of time-shifted systems. A set of preliminary simulations confirm the interest for this structure. I. INTRODUCTIONThe delivery of television over the Internet (IPTV) is expected to offer viewers new ways to enjoy TV content. One of the most promising services, often called catch-up TV or time-shifted TV, consists in allowing viewers to watch their favorite broadcast TV programs within an expanded time window. Let's say that a program is normally broadcasted from a given time t. In a catch-up TV, this program is made available for viewing at any time from t to t + δ hours where δ can be excessively long (several weeks). In this context, a viewer is also able to surf the TV content history using pause, rewind or fast forward commands, hence he/she can switch from a live experience to a shifted one.Today, to enjoy catch-up TV requires to record the stream on a Digital Video Recorder (DVR) connected to Internet. Of course, this is unacceptable for TV providers, which would like to control the delivery of their content. However, building a large-scale time-shifted streaming service is not trivial. Indeed, the disk-based servers that are currently used in ondemand video services (VoD) have not been designed for concurrent read and write operations. In particular, a VoD server can not massively ingest content. Moreover, delivery systems for IPTV can not be utilized because, contrarily to live streaming systems, time-shifted systems can not directly use group communication techniques like multicast protocols, for the reason that clients require distinct portions of the stream. Other obvious differences include the length of a catch-up TV stream, which can be several orders of magnitude longer than a typical movie in VoD, and the dynamicity of chunk request. Contrarily to VoD, the popularity of every chunk is variable in catch-up TV.A few papers have recently addressed the VCR problem in peer-to-peer VoD systems [1,2], but no previous work has assumed that VCR is so massively employed by user.

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Dedicated Disk I/O Strategies for IPTV Live Streaming Servers Supporting Timeshift Functions

Cited by 2 publications

References 3 publications

Peer-Assisted Time-Shifted Streaming Systems: Design and Promises

Peer-Assisted Time-Shifted Streaming Systems: Design and Promises

Distributed delivery system for time-shifted streaming systems

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