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| Deadline-aware network coding for video on demand service over P2P networks |
| Chi Hui-cheng, Zhang Qian |
| Department of Computer Science, Hong Kong University of Science and Technology, Hong Kong, China |
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Abstract We are interested in providing Video-on-Demand (VoD) streaming service to a large population of clients using peer-to-peer (P2P) approach. Given the asynchronous demands from multiple clients, continuously changing of the buffered contents, and the continuous video display requirement, how to collaborate with potential partners to get expected data for future content delivery are very important and challenging. In this paper, we develop a novel scheduling algorithm based on deadline-aware network coding (DNC) to fully exploit the network resource for efficient VoD service. DNC generalizes the existing network coding (NC) paradigm, an elegant solution for ubiquitous data distribution. Yet, with deadline awareness, DNC improves the network throughput and meanwhile avoid missing the play deadline in high probability, which is a major deficiency of the conventional NC. Extensive simulation results demonstrated that DNC achieves high streaming continuity even in tight network conditions.
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Received: 08 December 2005
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