SCORE: Exploiting Global Broadcasts to Create Offline Personal Channels for On-Demand Access
| Autor: | Jigna Chandaria, Gianfranco Nencioni, Dmytro Karamshuk, Vijay Badrinarayanan, Nishanth Sastry, Gareth Tyson, Jon Crowcroft |
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| Přispěvatelé: | Crowcroft, Jonathon [0000-0002-7013-0121], Apollo - University of Cambridge Repository |
| Rok vydání: | 2016 |
| Předmět: |
Computer Networks and Communications
Computer science 02 engineering and technology Broadcasting machine intelligence Oracle environmental factors 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering energy efficiency TV receivers energy conservation business.industry digital video broadcasting 020206 networking & telecommunications Provisioning Energy consumption digital TV Computer Science Applications TV broadcasting 020201 artificial intelligence & image processing Digital television recommender systems business Telecommunications Software Computer network Efficient energy use Content distribution networks |
| Zdroj: | Nencioni, G, Sastry, N, Tyson, G, Badrinarayanan, V, Karamshuk, D, Chandaria, J & Crowcroft, J 2016, ' SCORE : Exploiting Global Broadcasts to Create Offline Personal Channels for On-Demand Access ', Ieee-Acm Transactions On Networking, vol. 24, no. 4, 7210228, pp. 2429-2442 . https://doi.org/10.1109/TNET.2015.2456186 IEEE/ACM Transactions on Networking |
| DOI: | 10.1109/TNET.2015.2456186 |
| Popis: | The last 5 years have seen a dramatic shift in media distribution. For decades, TV and radio were solely provisioned using push-based broadcast technologies, forcing people to adhere to fixed schedules. The introduction of catch-up services, however, has now augmented such delivery with online pull-based alternatives. Typically, these allow users to fetch content for a limited period after initial broadcast, allowing users flexibility in accessing content. Whereas previous work has investigated both of these technologies, this paper explores and contrasts them, focusing on the network consequences of moving towards this multifaceted delivery model. Using traces from nearly 6 million users of BBC iPlayer, one of the largest catch-up TV services, we study this shift from push- to pull-based access. We propose a novel technique for unifying both push- and pull-based delivery: the Speculative Content Offloading and Recording Engine (SCORE). SCORE operates as a set-top box, which interacts with both broadcast push and online pull services. Whenever users wish to access media, it automatically switches between these distribution mechanisms in an attempt to optimize energy efficiency and network resource utilization. SCORE also can predict user viewing patterns, automatically recording certain shows from the broadcast interface. Evaluations using our BBC iPlayer traces show that, based on parameter settings, an oracle with complete knowledge of user consumption can save nearly 77% of the energy, and over 90% of the peak bandwidth, of pure IP streaming. Optimizing for energy consumption, SCORE can recover nearly half of both traffic and energy savings. This work is licensed under a Creative Commons Attribution 3.0 License. |
| Databáze: | OpenAIRE |
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