"IPTV services will have a huge impact on the metro networks that transport their content. IPTV services require dedicated bandwidth that ranges from 2 Mbit/s for standard definition (SD) to 8 Mbit/s for high definition (HD). As few as 20 percent penetration of an IPTV service will cause the video traffic to dominate the network. Priority based QoS techniques will not be able to resolve congestion issues because there will no longer be enough low priority packets to discard. The answer to this dilemma may be to move away from IP to an optical network architecture that better fits constant bit rate services."Bob Larribeau, senior analyst, MRG
"The technology would be whatever will deliver high speed data over wireless, with minimum power and maximum QoS. One of these may be the MIMO [multiple-input multiple-output] technology which implementations similar to that of 802.11n*. Another set of technologies are ones that allow seamless integration between different wireless standards, such as software radio, GSM-WiFi hopping and reconfigurable mobile IP."
* The emerging Wi-Fi local-area network standard with a theoretical 540 Mbit/s throughput.Prof. Izzat Darwazeh, Head of Communications and Information
Systems Group, University College London
Thursday, August 31, 2006
What next for the network?
Next Generation Networks asked several telecom industry veterans what technology or service they would highlight that is set to have the biggest impact on the network over the next three to five years. Here are some responses:-
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I share a similar view with Bob. Video/multimedia traffic (TV, VoD, or other), should the telcos be successful, will dominate their networks. Should VoD alone reach the levels achieved by companies like Cox and Comcast, the telcos will quickly run out of capacity in the metro and transport networks. Telcos looking to offer a competitive IPTV offering (i.e., something that is on par with what cable can offer) over copper will be left in the dust.
We think that some level of QoS will continue to be an essential part of the network even if it’s an all optical IP pipe at some point in the future. So that requirement will always be with us. QoS will be needed as networks evolve from asymmetrical model to an any-to-any communication model (something that terrifies most operators today). Unfortunately for operators (telco or cable), multimedia applications, music, sharing/collaboration applications will force the any-to-any paradigm shift in the future.
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