The Future of IP Telephony
• Three specialist doctors are performing a delicate operation. • They are all looking at the operation in progress, the patient’s charts and the equipment readings. • One is in Sydney, one in the US and one in Japan and their conference is in real time, thanks to VOIP.
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Voice, Video and Data Over IP
• Today
• People use Computers to send data over the traditional voice network • Computers are being used to make phone calls • Computing and Communications are converging
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Research Motivations
• Cost effectiveness - one set of wires to carry both voice and data - training in only one technology - ability to integrate the two different services • Richer communications - interactively pointing at, or drawing on diagrams.
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Project Description
• Establish an experimental testbed • Use freely available software (The Open H.323 Organisation) • Determine some of the major engineering requirements that a system needs to specify
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Questions To Be Answered
• How to overcome network congestion • Is it possible to achieve toll quality on the wired network, or do we need to go use a higher bandwidth network such as wireless?. • How do we achieve adequate QoS at the same time as decreasing cost and increasing scalability.
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•Considerations
• Efficient use of bandwidth • Priority mechanism this type of traffic – TOS in IP4 and Priority field in IP6? •Which protocol gives the best results? RSVP, RTP, RTCP, RTSP, ASF
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