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SmartData Collective > Big Data > Data Quality > An Internet 1000 times faster than today’s
Data QualityData Warehousing

An Internet 1000 times faster than today’s

BobGourley
Last updated: 2010/06/30 at 4:51 AM
BobGourley
7 Min Read
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Imagine the possibility of an Internet 1000 times faster than the one of today.  Dr. Vincent Chan, a great hero of modern telecommunications (and a mentor I’ve been honored to serve on an advisory board with) is leading research into developments that can produce just that.

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Imagine the possibility of an Internet 1000 times faster than the one of today.  Dr. Vincent Chan, a great hero of modern telecommunications (and a mentor I’ve been honored to serve on an advisory board with) is leading research into developments that can produce just that.

Dr. Chan has been leading a research team at MIT in design efforts that have produced demonstrations that would eliminate inefficient conversion processes in optical signal processing, resulting in dramatic increases in Internet speeds while actually reducing the amount of energy consumed by transmission devices.

This method is called Optical Flow Switching (OFS).  OFS exploits optical switching, routing and transport technologies to continue lowering costs while providing this higher speed.

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The following is from research announced on the MIT website:

QUOTE:

One of the reasons that optical data transmission is so efficient is that different wavelengths of light loaded with different information can travel over the same fiber. But problems arise when optical signals coming from different directions reach a router at the same time. Converting them to electrical signals allows the router to store them in memory until it can get to them. The wait may be a matter of milliseconds, but there’s no cost-effective way to hold an optical signal still for even that short a time.

Chan’s approach, called “flow switching,” solves this problem in a different way. Between locations that exchange large volumes of data — say, Los Angeles and New York City — flow switching would establish a dedicated path across the network. For certain wavelengths of light, routers along that path would accept signals coming in from only one direction and send them off in only one direction. Since there’s no possibility of signals arriving from multiple directions, there’s never a need to store them in memory.

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To some extent, something like this already happens in today’s Internet. A large Web company like Facebook or Google, for instance, might maintain huge banks of Web servers at a few different locations in the United States. The servers might exchange so much data that the company will simply lease a particular wavelength of light from one of the telecommunications companies that maintains the country’s fiber-optic networks. Across a designated pathway, no other Internet traffic can use that wavelength.

In this case, however, the allotment of bandwidth between the two endpoints is fixed. If for some reason the company’s servers aren’t exchanging much data, the bandwidth of the dedicated wavelength is being wasted. If the servers are exchanging a lot of data, they might exceed the capacity of the link.

In a flow-switching network, the allotment of bandwidth would change constantly. As traffic between New York and Los Angeles increased, new, dedicated wavelengths would be recruited to handle it; as the traffic tailed off, the wavelengths would be relinquished. Chan and his colleagues have developed network management protocols that can perform these reallocations in a matter of seconds.

In a series of papers published over a span of 20 years — the latest of which will be presented at the OptoElectronics and Communications Conference in Japan next month — they’ve also performed mathematical analyses of flow-switched networks’ capacity and reported the results of extensive computer simulations. They’ve even tried out their ideas on a small experimental optical network that runs along the Eastern Seaboard.

Their conclusion is that flow switching can easily increase the data rates of optical networks 100-fold and possibly 1,000-fold, with further improvements of the network management scheme. Their recent work has focused on the power savings that flow switching offers: In most applications of information technology, power can be traded for speed and vice versa, but the researchers are trying to quantify that relationship. Among other things, they’ve shown that even with a 100-fold increase in data rates, flow switching could still reduce the Internet’s power consumption.

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Growing appetite

Ori Gerstel, a principal engineer at Cisco Systems, the largest manufacturer of network routing equipment, says that several other techniques for increasing the data rate of optical networks, with names like burst switching and optical packet switching, have been proposed, but that flow switching is “much more practical.” The chief obstacle to its adoption, he says, isn’t technical but economic. Implementing Chan’s scheme would mean replacing existing Internet routers with new ones that don’t have to convert optical signals to electrical signals. But, Gerstel says, it’s not clear that there’s currently enough demand for a faster Internet to warrant that expense. “Flow switching works fairly well for fairly large demand — if you have users who need a lot of bandwidth and want low delay through the network,” Gerstel says. “But most customers are not in that niche today.”

But Chan points to the explosion of the popularity of both Internet video and high-definition television in recent years. If those two trends converge — if people begin hungering for high-definition video feeds directly to their computers — flow switching may make financial sense. Chan points at the 30-inch computer monitor atop his desk in MIT’s Research Lab of Electronics. “High resolution at 120 frames per second,” he says: “That’s a lot of data.”

BobGourley June 30, 2010
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