First, it was a very public detente with BitTorrent.
Then, on Tuesday, Comcast continued its make-nice-with-P2P campaign by announcing a new collaboration with P2P software maker Pando Networks. Specifically, they're leading the development of a "P2P Bill of Rights and Responsibilities," driven by input from "industry experts, other ISPs and P2P companies, content providers and others."
"By having this framework in place, we will help P2P companies, ISPs and content owners find common ground to support consumers who want to use P2P applications to deliver legal content," Comcast Chief Technology Officer Tony Werner said in a statement.
The companies also plan to test Pando technology designed to capture and analyze the flow of P2P traffic on Comcast's fiber-optic network and other Internet service providers' networks. The idea is to publish the results of the tests--which will measure "performance, speed, distance and geography as well as bandwidth consumption impact to the ISP"--so that other ISPs can learn how P2P applications might be optimized on their networks.
Pando, for its part, has already worked with Verizon and Yale University researchers to test "smarter" P2P routing techniques that have been found to drastically reduce network utilization and speed up downloads for subscribers.
a screen shot of Pando's P2P software
(Credit: Pando Networks)Comcast drew public criticism and a Federal Communications Commission probe after reports that it was delaying uploads of peer-to-peer file-sharing traffic on the BitTorrent protocol. Comcast has defended the move as necessary to keep its network running smoothly at peak hours for all users. But there have been allegations, including from FCC Chairman Kevin Martin, that the company didn't do enough to inform its users about those activities.
The subject is likely to come up again this Thursday during a second FCC hearing at Stanford University, as well as at a U.S. Senate committee hearing on the "future of the Internet" scheduled for next week.
Kyle McSlarrow, president and CEO of the National Cable and Telecommunications Association--the industry group of which Comcast is a member--called the announcement "further evidence that private sector collaboration, not government intervention, is the most appropriate way to address complicated technological issues."
Proponents of Net neutrality rules--that is, barring network operators from prioritizing Internet content based on its ownership or type--have asked the FCC to declare that Comcast's peer-to-peer traffic management is not reasonable and therefore off limits.
One such group, Public Knowledge, called the agreement "long on rhetoric," "short on detail," and "ludicrous." Another group, Free Press, was similarly unimpressed by the company's latest overtures, saying the need for Net neutrality rules "remains urgent."
"Slick press releases by a dishonest would-be gatekeeper do nothing to protect consumers," said Marvin Ammori, the group's general counsel. "Comcast's announcement is little more than the fox telling the farmer, 'I'll guard the henhouse, you can go home.' And that's all the attention it deserves."
A real-world Internet test reveals that "intelligent" routing of peer-to-peer traffic can drastically reduce network utilization and speed up downloads for subscribers, according to a new study.
Verizon Communications, which participated in the study headed by researchers at Yale University, plans to release the data on Friday at the Distributed Computing Industry Association's P2P Market Conference in New York City.
Using network topology data from Verizon and Telefonica, Yale University tested a software enhancement to the peer-to-peer protocol that it developed with software developer Pando Networks.
What the researchers discovered was that when using the so-called P4P software they were able to reduce the impact of peer-to-peer traffic on Verizon's network by more than 50 percent. This is significant because peer-to-peer traffic makes up roughly half of all traffic traveling over Verizon's network.
The P2P protocol, which is used to distribute large data files, works by requesting pieces of a single file from different hosts all over the Internet. The technology has become popular for distributing high-definition video.
But applications that use P2P eat up a lot of bandwidth, which some service providers say is a problem. Cable operator Comcast has slowed down certain kinds of peer-to-peer traffic in an effort to manage its network. And Time Warner Cable is experimenting with a tiered usage model to deter people from sharing P2P files.
Traditionally, the P2P protocol has requested bits and pieces of content randomly, without considering the physical location of the data. This often results in some pieces of the content traveling over long distances across the network. For example, a user in New Jersey downloading a movie might get some bits of the file from New York and others from China or California.
The P4P software enhancements add intelligence to this process so that the bits are served from local hosts.
Douglas Pasko is Verizon senior technologist and co-chair of the P4P Working Group, which was formed by Verizon, Pando Networks, and the university to develop P4P. He said that when the P4P software was used on the Verizon network it found that 58 percent of its peer-to-peer network traffic stayed local. Using regular P2P technology, only 6 percent of the traffic stayed local.
Reducing the number of hops is key
Pasko said that keeping the traffic local is important because every link that a bit passes through costs the operator something. This means that if a Fios subscriber in New Jersey can get bits of content from Verizon customers in New York City instead of getting them from Singapore or Taiwan, Verizon can save money.
The key is reducing the number of routers or hops the traffic has to go through to get to its destination. On average, Pasko said that regular P2P traffic makes 5.5 hops to get its destination. Using the P4P protocol, those same files took an average of 0.89 hops.
Reducing hops means that Verizon can cut its network costs. Exactly how much the company saves depends on the individual links, but Pasko said the savings are significant.
Verizon broadband subscribers also saw a benefit when the P4P protocol was used. Customers using Verizon's all-fiber network called Fios saw movies downloading on average twice as fast as when they used the traditional P2P software. Some customers saw as much as a 6x improvement in download speeds, Pasko said.
For customers on regular DSL service, the improvement in download speeds wasn't as great because these customers don't have high bandwidth connections anyway.
This real-world field trial validates the value of P2P content providers working closely with Internet service providers to provide the most efficient service for customers, Pasko said. There are already 50 members in the DCIA's P4P Working Group, including some cable operators, such as Comcast, Cablevision, and Time Warner, he said.
"We hope this shows that using P2P in an intelligent way can benefit everyone," he said. "It allows us to use fewer resources on our network and get better performance for our customers."
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