QoE Driven Server Selection for VoD in the Cloud
Abstract
In commercial Video-on-Demand (VoD) systems, user's Quality of Experience (QoE) is the key factor for user satisfaction. In order to improve user's QoE, VoD providers replicate popular videos in geo-distributed Cloud and deploy cache servers close to users. Generally, the VoD provider selects a server for the user request according to the user's location. Usually geographically closely located servers would provide lower network delay. However, the performance of VoD servers deployed in cloud virtual machines (VM) depends not only on the network delay but also resource contention due to other VMs and highly dynamic user demands. Thus, QoE offered by the server varies greatly over time as user demands and network traffic fluctuate regardless of the location. Selecting a server close to users sometimes reduces the network delay but cannot guarantee QoE in general. We believe that end users have the best perception of server performance in terms of their QoE rather than the servers themselves. What user perceives incorporate performance of all elements, such as network delay and server response time in VoD service. We propose VoD server selection schemes that dynamically select servers according to user's QoE feedback. We integrate our server selection schemes with Dynamic Adaptive Streaming over HTTP (DASH) clients and evaluate our system both in simulation and in Google Cloud. Results show our system improves user QoE up to 20% compared to existing solutions.
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- Authors
- Wang, C., Kim, H., & Morla, R.
- Affiliations
- Universidade do Porto (PT)
- Carnegie Mellon University (US)
- Venue
- 2015 IEEE 8th International Conference on Cloud Computing
- Publisher
- IEEE
- Published
- 2015-06
- Pages
- 917-924
- ISSN
- 2159-6190 (ISSN-L)
- OpenAlex
- W1574159404
- Cited by
- 11
- References
- 14
- Citations by year
- 2021: 1 · 2020: 1 · 2019: 2 · 2018: 2 · 2016: 3 · 2015: 1 · 2014: 1
- FWCI
- 1.49
- Type
- conference paper
- Language
- en
- Open access
- closed
- Locations
- IEEE ... International Conference on Cloud Computing (publishedVersion)
- Topics
- Physical Sciences › Computer Science › Computer Networks and Communications › Caching and Content Delivery
- Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Image and Video Quality Assessment
- Physical Sciences › Computer Science › Computer Networks and Communications › Network Traffic and Congestion Control
- Keywords
- video on demand, quality of experience, server selection, geo-distributed cloud, content caching, dynamic adaptive streaming over HTTP, resource contention, virtual machines, network latency, user perception
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