An Algorithm on Video Caching Design in Content Delivery Network

Kai Wu; Chensheng Wang; Guang Yang

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An Algorithm on Video Caching Design in Content Delivery Network

Kai Wu,Chensheng Wang *,Guang Yang

School of Automation, Beijing University of Post and Telecommunications, Beijing, 100876

*Correspondence author

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Funding: Key Technolgies on the Intelligence of Advanced CNC Lathe,Jiangsu Province（No.BE2016032）

Opened online:16 June 2017

Accepted by: none

Citation: Kai Wu,Chensheng Wang,Guang Yang.An Algorithm on Video Caching Design in Content Delivery Network[OL]. [16 June 2017] http://en.paper.edu.cn/en_releasepaper/content/4735355

In recent years, multimedia traffic such as video on demand shows explosive growth on the Internet. Network operators are considering content delivery network as the main strategy to keep up with the increasing demand for video requests with the minimum possible delay. Layered video encoding strategies such as Scalable Video Coding enable different caches to store different layers of a video content, allowing successive improvement of the video stream quality. However, the caching placement of video encoding layers that minimize the average delay is NP-hard. We reduce the complexity of this problem to pseudopolynomial time by using a connection with multiple-choice knapsack problem. Numerical results show up to 25% reduction in delay over existing video caching strategies.

Keywords:Network Design, Video Encoding, Cache Design

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