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Originally Posted by Kymmy
Hmmm, won't hold my breath..
Q? How will the IPTV streams work? Will they still be a constant stream but instead perhaps gated at the cabinets for each user until the IP requests the stream to be routed? Or are they going for a complete shutdown of the streams and have it more like a scenario where you request a stream to be opened from the main source and it's yours and only yours all the way?
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Multicast though without the IGMP snooping L2 switch.
Streams will only be sent to a physical area when a box on that node requests them of course, in a similar manner to
Switched Digital Video.
A really cool thing of course is that when a box wants to view a stream it needs to call home so that it can announce its' desire to join the multicast group opening the way for constant and repeated 2-way authentication:
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An IP multicast group address is used by sources and the receivers to send and receive content. Sources use the group address as the IP destination address in their data packets. Receivers use this group address to inform the network that they are interested in receiving packets sent to that group. For example, if some content is associated with group 239.1.1.1, the source will send data packets destined to 239.1.1.1. Receivers for that content will inform the network that they are interested in receiving data packets sent to the group 239.1.1.1. The receiver "joins" 239.1.1.1. The protocol used by receivers to join a group is called the Internet Group Management Protocol (IGMP).
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The other option is to just use unicast, 1 box, 1 stream, but that's probably impractical for bandwidth purposes.