1 / 33

Multi-Path Video Transport Over Ad-Hoc Network

Multi-Path Video Transport Over Ad-Hoc Network. IEEE Wireless Communications August 2005 報告者： 李冠群. Outline. Introduction Architecture Overview Multi-Stream Video Coding Multi-Path Routing Transport mechanism Simulation Conclusion. 1. Introduction. 1. Introduction.

aran
Télécharger la présentation

Multi-Path Video Transport Over Ad-Hoc Network

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Multi-Path Video Transport Over Ad-Hoc Network IEEE Wireless Communications August 2005 報告者： 李冠群

  2. Outline • Introduction • Architecture Overview • Multi-Stream Video Coding • Multi-Path Routing • Transport mechanism • Simulation • Conclusion

  3. 1. Introduction

  4. 1. Introduction • Real-time video overAd-Hoc network

  5. 1. Introduction • Real-time multimedia: • Stringent QoS request • (bandwidth, delay, loss) • Wireless ad-hoc network: • Frequent link failure & congestion • Transmission error • Combine  challenge!

  6. 1. Introduction • Overcome: • Multi-path transport(user multiple path in parallel for a real-time multimedia session)

  7. 1. Introduction • Multi-Path transport Sender Receiver

  8. 1. Introduction • Multi-Path transport Sender Receiver

  9. 2. Architecture Overview

  10. 2. Architecture Overview • Provide multi-path transport: • Multi-Stream video coding • Multi-Path routing • Transport mechanism

  11. 2. Architecture Overview • Point-to-point

  12. 2. Architecture Overview • Design Trade-off • Advantage: • Path diversity • Low congestion & delay • Disadvantage • Higher coding redundancy • Higher computation complexity • Higher control traffic overhead

  13. 3. Multi-Stream Video Coding

  14. 3. Multi-Stream Video Coding

  15. 3. Multi-Stream Video Coding • Three approach: • Feedback-based reference picture selection • Layered Coding with Selective ARQ • Multiple Description Coding

  16. 3. Multi-Stream Video Coding • a. Feedback-based reference picture selection: • Disperse a stream onto multiple paths(Even bit  path 1, Odd bit  path 2) • Select the reference picture according feedback

  17. 3. Multi-Stream Video Coding • a. Feedback-based reference picture selection:

  18. 3. Multi-Stream Video Coding • b. Layered Coding with Selective ARQ. • Layer coding (base layer, enhancement layer) • Selective ARQ for base layer • Retransmission using the enhancement layer path

  19. 3. Multi-Stream Video Coding • b. Layered Coding with Selective ARQ.

  20. 3. Multi-Stream Video Coding • c. Multiple Description Coding • multiple equally important descriptions • Two streams can decode independently

  21. 3. Multi-Stream Video Coding

  22. 4. Multi-Path routing

  23. 4. Multi-Path routing

  24. 4. Multi-Path routing • Source routing: DSR • SCTP • Application-layer routing (overlay)

  25. 5. Transport mechanism

  26. 5. Transport mechanism

  27. 5. Transport mechanism • Multifllow Real-Time Transport Protocol(MRTP) • Support the general multipath transport architecture for real-time multimedia app. • Real-time traffic • multipath transport • Dynamic add/remove path according QoS feedback

  28. 5. Transport mechanism

  29. 5. Transport mechanism • MRTP

  30. 6. Simulation

  31. 6. Simulation • Use MDMC + DSR + MRTP/MRTCP

  32. 6. Simulation Single path 30.19dB Multipath path 31.45dB

  33. 7. Conclusion • Multipath is better then single-path • Can use in wide mesh network (ex. internet)

More Related