Part 1: Then you'll probably appreciate this DD....From 2007 here's Ian Stewart talking about the same thing you mentioned... the need for this technology.
A solution to the Multicast Problems?
Written by Administrator
Tuesday, 31 July 2007
We need a solution!
We need a software-based solution for large-scale delivery of video (or data) on the Public Internet.
IP delivered linear channels are sprouting up, but how will they conquer the point to-point delivery problems associated with IP video? Even Akamai’s huge and expensive “edge” delivery system, which uses the Internet Engineering Task Force’s Real Time Streaming Protocol (RTSP), is limited to about 300,000 simultaneous viewers.
The CBS March Madness sporting event is a detailed exploration of the point to-point video delivery problems and corresponding limitations. Despite this event’s success at serving approximately 300,000 viewers, many more potential viewers were frustrated and had to wait in line.
Stanford University professor, Steven Deering invented the system we need (thanks Steve), but Deering’s specification – which he called “IP Multicast” – was not a reliable protocol (set of rules). IP Multicast is prone to a percentage of data (or packet) loss. Deering’s “IP Multicast” protocol was never intended to be a complete solution, just a “building block.”
The IETF has made an effort to design a scalable system for Reliable IP Multicast. Their best effort to date was originally called PGM, which stood for "Pretty Good Multicast." Unfortunately, they have a separate group working on the Security and Reliability of the IP Multicast transmissions. This has led to lack of interoperability between the Security and Reliability of the IETF’s systems; they are separate systems (proposals actually) creating lack of co-ordination and efficiency. Hence, World Multicast came up with a new solution (and definition) – The Secure/Reliable IP Multicast. By combining security and reliability into the same SMART process, we have increased efficiency and “interoperability.”
So let's solve this in the field, where we can really test the ideas, let us wait no more for Mr. Big to give a thumbs up! If we do that, we are liable to get strapped helping the "cronies" get more market share!
Come on Troops! We can do it!
Ian A. Stewart
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