Slide 1

Method of Frame Buffer Transmission over Reliable Multicast Network Choon Jin NG Masahiro Takatsuka

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Overview Introduction Overall issues with screen sharing Limitation of available prototypes Solution Conclusion

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Introduction to Screen Sharing Screen sharing is important in many CSCW applications. AT&T Virtual Network Computing (VNC), Microsofts Remote Desktop Protocol (RDP), Apple Remote Desktop (ARD) to perform remote administration. Also in MSN Messenger, Adobe Connect, Skype, WebEx, Vsee & etc for participants to share contents.

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Scaling CSCW Collaboration With bandwidth increase, collaboration technologies has been increasingly complicated. Involves more and more participants. Number of connection increase.

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Screen Sharing Modes 1 to 1 Typical screen sharing. 1 to * Does not scale more than 5-10 participants. Need to duplicate same packet to all nodes. * to * Consume tremendous network resources if packet duplication is required for all nodes. Latency is important factor in CSCW!

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Problems with current approach To scale, improve performance such as TightVNC. Most systems are designed for unicast connectivity. Suitable for sharing with 1 person up till about 10 on a single media. Attempt to improve with multicast screen sharing. Benefit of multicast: Nb