DVB-IPTV content download services—overview and use cases

Stockhammer, Thomas; Heiles, J.; Luken, J.

doi:10.1007/s11042-010-0505-3

Cited by 5 publications

(2 citation statements)

References 3 publications

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“…Following the architecture of a network for IPTV services (Simsarian & Duelk, 2007;Stockhammer & Heiles, 2009), the servers are organized in tree hierarchy of L = 3 levels where each level l = 1, 2 and 3, contains 10, 2 and 1 servers, respectively. The streaming capacities of the servers, in the same order of levels, are U (s) = 250, 500 and 1000 Mbps, accordingly.…”

Section: Simulations and Resultsmentioning

confidence: 99%

“…Apart from the main service of multicast linear TV, the IPTV offers more personalized services like TSTV and NPVR (Stockhammer & Heiles, 2009), which require dedicated data flow for each request. Because of their growing popularity, the problem of the optimal network utilization and the provision of an improved QoS is a main concern for many research works.…”

Section: Related Workmentioning

confidence: 99%

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Architectures for Video-on-Demand content distribution in managed networks

Gramatikov¹

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The demand of video contents has rapidly increased in the past years as a result of the wide deployment of IPTV and the variety of services offered by the network operators. One of the services that has especially become attractive to the customers is real-time Video on Demand (VoD) because it offers an immediate streaming of a large variety of video contents.The price that the operators have to pay for this convenience is the increased traffic in the networks, which are becoming more congested due to the higher demand for VoD contents and the increased quality of the videos. Therefore, one of the main objectives of this thesis is finding solutions that would reduce the traffic in the core of the network, keeping the quality of service on satisfactory level and reducing the traffic cost.The thesis proposes a system of hierarchical structure of streaming servers that runs an algorithm for optimal placement of the contents according to the users' behavior and the state of the network. Since any algorithm for optimal content distribution reaches a limit upon which no further improvements can be made, including service customers themselves (the peers) in the streaming process can further reduce the network traffic. This process is achieved by taking advantage of the control that the operator has in the privately managed networks over the Set-Top Boxes placed at the clients' premises. The operator reserves certain storage and streaming capacity on the peers to store the video contents and to stream them to the other clients in order to alleviate the streaming servers.Because of the inability of the peers to completely substitute the streaming servers, the thesis proposes a system for peer-assisted streaming. Some of the important questions addressed in the thesis are how the system parameters and the various distributions of the video contents on the peers would impact the overall system performance. In order to give answers to these questions, the thesis proposes a precise and flexible stochastic model that takes into consideration parameters like uplink and storage capacity of the peers, number of peers, size of the video content library, size of contents and content distribution scheme to estimate the benefits of the peer-assisted streaming. The work also proposes an extended version of the mathematical model by including the failure probability of the peers and their recovery time in the set of parameters. These models are used as tools for conducting thorough analyses of the peer-assisted system for VoD streaming for the wide range of defined parameters.

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Section: Simulations and Resultsmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%