An Application Gateway to Deploy Highquality Video Communications in Various Network Environments

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An Application Gateway to Deploy High-quality
Video Communicationsin Various Network
Environments

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Author and Source

• Author
• Takashi Kishida, Kaori Maeda, Eitaro Kohno and
  Yoshiaki Kakuda
• Source
• Proceedings of the International Symposium on
  Applications and the Internet Workshops
  (SAINTW06)

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Outline

• Introduction
• Overview of PTGATE
• Practical Experiments
• Evaluations
• Conclusions

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Introduction

• Video Communications VS Various Network
• Our purpose of the development is to extend
  available scenes of video conferences.

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Introduction

• There are two approaches to use videoconference
  systems in various network environments
• One is migration or development of these systems
  themselves to correspond to the required
  environment.
• The second approach is a gateway to translate
  from the current environment to the required one.

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Introduction

• Why Gateway?
• Our goal is to realize distance communications in
  various situations depending on network
  environments using PTGATE.

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Overview of PTGATE

• Feature
• PTGATE behaves as a buffer of the actual network
  environment and the required one.
• PTGATE has an error recovery using a Forward
  Error Correction (FEC).

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Overview of PTGATE

• FEC ( Forward Error Correction )

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Overview of PTGATE
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Overview of PTGATE
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Overview of PTGATE
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Practical Experiments
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Practical Experiments
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Evaluations
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Evaluations

• Throughput measurement

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Evaluations

• RTT and Jitter

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Evaluations

• Discussion
• It is enough to use any videoconference systems
  since the throughput of PTGATE is about 90Mbps
  which high quality video conference systems
  required bandwidth is 2530Mbps.

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Evaluations

• Discussion
• Also, the delay caused by PTGATE has no effect
  on bidirectional distance communication since
  0.7ms is very short compared with the guideline
  of ITU-T G.11412.

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Evaluations

• Discussion
• The jitter is no effect on videoconference
  systems since the jitter increase via PTGATE is
  smaller than the generated jitter on the Internet.

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Evaluations

• Discussions
• On the other hand, the overhead is greater by
  using an error recovery function because of FEC
  process requires is needed high CPU performance.
  In the case of using an error recovery function,
  application is restricted by the specification of
  PCs and videoconference systems.

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Conclusion

• We show PTGATE as a useful application to deploy
  video communications by IPv6.
• As a future problems, we will have more practical
  experiments and evaluate the availability of
  PTGATE in actual networks.