1. Video Streaming Over Content Centric Networking: Experimental Studies On PlanetLab
Suphakit Awiphan, Takeshi Muto, Yu Wang, Zhou Su, Jiro Katto
Computer Science and Engineering
Waseda University
Speaker: Yu Wang

2. Contents Background and Introduction Related Work
Video Streaming over Content Centric Networking: Experimental Studies on PlanetLab
Effect of Overlay Path
Effect of Chunk Size
Adaptive Video Streaming with MPEG-DASH
Conclusion

3. Background: Host-based Communication
Internet architecture
Routing and Transport protocols (TCP/IP)
Host-based communication
But users actually focus on content they wish to receive, rather than its location.
So traffic on the Internet can be attributed to content-oriented service

4. Background: Today’s CDN and P2P
IP-based communication without CDN
IP-based communication with CDN
Concerns
Current network has no ability to leverage caching at the network level
Resources sharing between different CDNs is not possible
P2P may lead to expensive inefficient traffic across providers

5. Introduction: Content Centric Networking
In Content Centric Networking (CCN), the universal component of network stack is moved from IP to chunks of named content (no IP)
CCN Message Types
Interest: used to request data
Data (Content Object): used to supply data

6. Introduction: Content Centric Networking
Interest message
indentify a chunk of data to retrieve specifically
provide a name prefix to specify the collection of data

7. Introduction: Content Centric Networking
CCN node in the path caches and sends content to end users requesting the same contents
Users can directly retrieve data from cache if available
Additional cache server is unnecessary
Network load and delivery delay can be reduced
interest
Content Object
Studies on several aspects of CCN (e.g., routing, caching) are still necessary

8. Contents Background and Introduction Related Work
Video Streaming over Content Centric Networking: Experimental Studies on PlanetLab
Effect of Overlay Path
Effect of Chunk Size
Adaptive Video Streaming with MPEG-DASH
Conclusion

9. Related Work: CCN Video Streaming
H. Xu et al.* conduct experiments of CCN video streaming on Android clients using CCNx software
The results of experiments demonstrate the advantages of CCN video streaming in terms of bandwidth utilization and delay optimization*
* H. Xu, Z. Chen, R. Chen, and J. Cao, “Live Streaming with Content Centric Networking”, Proc. ICNDC 2012, Oct

10. Contents Background and Introductino Related Work
Video Streaming over Content Centric Networking: Experimental Studies on PlanetLab
Effect of Overlay Path
Effect of Chunk Size
Adaptive Video Streaming with MPEG-DASH
Conclusion

11. Video Streaming over CCN: Experiments on PlanetLab
We examine three aspects (i.e., overlay path, chunk size, adaptive bit-rate streaming) of video streaming over CCN
Experiments are performed using CCNx on PlanetLab
Video file is chopped into multiple chunks and transmitted using ccnsendchunks
VLC media player is used to play the video
Video file is received using ccncatchunks
Stream bit-rate and video quality can be observed

12. Video Streaming over CCN: The Effect of Overlay Path
(1) Chain topology
Streaming quality depends on the parent node

13. Video Streaming over CCN: The Effect of Overlay Path
(2) Mesh topology
Node in Singapore receives data from the source in Japan which has the shorter response time than other two clients
In the current implementation,
ccn node selects the face which has the shortest response time
ccn daemon adjusts the predicted time for a response of content
the time is decreased if content is received within the previous
predicted value, and increased if not

14. Contents Background and Introduction Related Work
Video Streaming over Content Centric Networking: Experimental Studies on PlanetLab
Effect of Overlay Path
Effect of Chunk Size
Adaptive Video Streaming with MPEG-DASH
Conclusion

15. Video Streaming over CCN: The Effect of Chunk Size
3 PlanetLab nodes (Source: Japan, Receiver: USA, Singapore)
Data chunk sizes : 1024, 2048, 8192 bytes
USA node
When chunk size is increased, the number of produced segments and total overhead decrease
Singapore node
Streaming quality can be improved

16. Contents Background and Introduction Related Work
Video Streaming over Content Centric Networking: Experimental Studies on PlanetLab
Effect of Overlay Path
Effect of Chunk Size
Adaptive Video Streaming with MPEG-DASH
Conclusion

17. Video Streaming over CCN: Adaptive Video Streaming with MPEG-DASH
Overview of MPEG-DASH
Media is partitioned into multiple segments
A media presentation description (MPD) is created at a server
When a client downloads a MPD file, segments can be downloaded consequently according to the specification
Experiment on CCN & MPEG-DASH

18. Video Streaming over CCN: Adaptive Video Streaming with MPEG-DASH
DASH Encoder Configuration
Representation bit-rate
300 | 500 | 1000 | 3000 kbps
Segment size
5 seconds
Representation bit-rate is selected according to estimated throughput
Source is located in Germany
Receiver is located in Japan
Source is located in USA (Bandwidth = 1 Mbps)
Receiver is located in Japan
Representation bit-rate is selected according to estimated throughput

19. Video Streaming over CCN: Adaptive Video Streaming with MPEG-DASH
Source is located in Japan
Receiver is located in Japan
Source is located in USA
Receiver is located in Japan

20. Video Streaming over CCN: Adaptive Video Streaming with MPEG-DASH
Time required for receiving all Content Objects of each DASH’s video segments is greater than the segment duration (5 s)
Delay of Receipt of Content Objects
Source is located in Germany
Non-smooth video playback
Expected solutions
Increasing the size of Content Object
Increasing playout buffering delay
Increasing the window size
Source is located in USA
Challenge
In the current implementation, the size of chunks stored in the repository cannot be specified

21. Contents Background and Introduction Related Work
Video Streaming over Content Centric Networking: Experimental Studies on PlanetLab
Effect of Overlay Path
Effect of Chunk Size
Adaptive Video Streaming with MPEG-DASH
Conclusion

22. Conclusion
The change from IP to CCN requires studies on several aspects
Some works demonstrate the advantages of CCN video streaming in terms of bandwidth utilization and delay optimization
We have presented the implementation experiments to explore other important factors of video streaming over CCN
The results of experiments using CCNx on PlanetLab show that
the overlay path affects the streaming quality
increasing the size of data chunk improves the streaming quality
adaptive bit-rate streaming can be achieved with MPEG-DASH
Future work
We will study a method to reduce the delay to receive Content Objects of MPEG-DASH video segments in order to improve the playback quality