Forschungstage Informatik 2018

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### A Brief Task on Networks and
# Communications: <br/> From Fire Signals to NetFlix

### Forschungstage Informatik - 2018

##### *Prof. Dr.-Ing. Thorsten Herfet, .hon-speaker[Andreas Schmidt], Pablo Gil Pereira, Kelvin Chelli*

##### Telecommunications Lab, Saarland Informatics Campus, 14th and 15th June 2018

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Welcome students. TH

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# DASH Emulator

**Practical** analysis of video streaming **concepts**.

Implementation in **Python 3**.

Emulated environment: 3 minutes video session in milliseconds.

**Metrics**:
  * Downloaded video quality.
  * Buffer level.
  * Total duration of re-bufferings.
  * Wasted download oportunities.

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# Adaptive Bit Rate (ABR) Algorithms

Implemented in the video client to select the segment quality.

They consider metrics such as **average throughput** and **buffer level**.

**SimpleABR**: next quality is the immediately inferior to the average throughput of the last download.

**TC_TeamABR**: Can you beat us?

.center.dash-abr[
![DASH](img/dash.png).small[[Source](https://www.researchgate.net/profile/Tobias_Hossfeld/publication/271524253_A_Survey_on_Quality_of_Experience_of_HTTP_Adaptive_Streaming/links/55f4224e08ae63926cf2688f/A-Survey-on-Quality-of-Experience-of-HTTP-Adaptive-Streaming.pdf)]
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# Jupyter

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![Jupyter](img/jupyter.png)
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# How does the emulator look like?

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![Emulator](img/plots.png)
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# Tasks

* Play with player configuration parameters to get better performance.
  * Buffer size, reference buffer, N...
  * RANDOM_SEED controls the network scenario.

* Build up your own ABR based on `SimpleABR`.
  * Modify `SimpleABR` inside the notebook and execute the cells.

* Beat us and get a bounty...

![Bounty](img/Bounty.jpg)
.small[[Source](https://upload.wikimedia.org/wikipedia/en/1/19/Bounty-Wrapper-Small.jpg)]