Babbage

Science and technology

Bandwidth caps

Slowing the stream

Jul 3rd 2011, 16:38 by G.F. | SEATTLE

ON A typical home network, video is by far the biggest bandwidth hog. Streaming and downloading it dwarf all other online activity, especially if, like Babbage and Mrs Babbage, a household forgoes cable or satellite television. With their own (modest) viewing habits and small children's addiction to "Bob the Builder", they burn through at least 75GB of video each month.

Soon they may face additional costs. Broadband providers in America have increasingly turned to broadband usage caps, with monthly limits of 100-250GB, with some firms cancelling service thereafter and others charging overage fees. Caps are not entirely unreasonable. After all, people who gulp down vast draughts of bandwidth might be expected to pay more than less grasping users. However, Babbage suspects that the caps are being put in place to deter consumers from finding alternatives to subscription-based television services fed via coaxial cable or fibre-optic connections.

Netflix, which streams, among other things, "Bob the Builder", now offers customers a nifty way to prevent accidental breaches of the caps. The setting was added without fanfare, but caught the eye of the networking site Connected Planet. Subscribers may choose among three levels of bandwidth usage. Good quality uses up to 300MB per hour; better, up to 700MB; and best up to 1GB for standard video and 2.3GB for high definition (HD). In other words, one could stream non-stop for a whole month at "good" without exceeding a 250 GB cap, but would hit the limit after just four and a half days with HD.

The company already throttles quality based on a subscriber's bandwidth congestion. This Babbage has occasionally watched streamed video in which recognisable action is replaced by large blobs of colour swarming through space (and no, he was not enjoying a classic sci-fi horror at the time). Often, though, even low quality is highly watchable, and high-quality versions of some shows are not available in any case.

Few companies are likely to follow in Netflix's footsteps (even it is not advertising the option too loudly). Providers are rarely keen, in effect, to nobble themselves for no immediate commercial reason—it should, after all, be in the viewer's interest to keep tabs on his broadband usage. But Netfix's dominant position in the market for streaming means it can permit itself the luxury of making life easier for customers. Sandvine, a network-research outfit, reports that "real-time entertainment" comprises nearly half of wired broadband traffic during daily peak periods. Netflix makes up a sizeable portion of that. That portion may swell further if customers come to believe that it not only offers quality fare, but a helping hand as well.

Readers' comments

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Ah Beng

Metered internet might make sense if the allocation of bandwidth was a scarce commodity. It really doesn't, though: the marginal cost of transferring information is essentially nil. Instead, what a metered charge does do is affect latency and packet loss in the overall system, and no metered internet service promotes allocative efficiency for those qualities of internet access.

That companies are using "traffic shaping" to kill the effectiveness of certain services and claiming to meter internet usage like one might meter power or water is deeply troubling. My ISP sold me a service that they claim is "unlimited." However, by adding a surcharge for so-called overuse and not otherwise changing their fee structure, the company has essentially just magicked into existence a new source of revenue, without otherwise improving service quality. Since I am a very heavy internet user, running a home sftp server for my family among other things, this adds pain with no gain.

Even if it turns out that they didn't build the necessary infrastructure to fulfill their promise, I wouldn't mind if fees were raised along with a promised increase in service quality. Nor would I mind if everything went on a pure metered service, without the up-front fee - presumably, each marginal byte transferred would be cheaper - with some surcharge for infrastructure improvement. But neither is happening. Metered rates in Canada have clearly shown themselves to be designed to discourage use and increase shareholder value instead of to improve services. No wonder American companies are gung-ho about adopting this model - it's free money, with those few knowledgeable enough to defy the "common sense" comparison to electric meters shouted down by all the rest.

brim4brim

A company called Digiweb does this in Ireland.

Everyone gets a 150GB cap initially and as you approach it, they send you out a letter (you can also monitor usage per day and total usage on their website), then if you over the cap, you get a warning and another 20GB free.

If you do this more than twice they start charging you for the extra 20GB at 5 Euro per 20GB or something like that which isn't price gouging. If you refuse to pay that, you get throttled to dial up speeds until your usage falls under the cap again.

As they do this, peoples usage isn't crazy high so contention doesn't kick in as much and you usually get advertised speeds.

My parents have their DSL service and it is the best we have seen (under a company they bought called Smart Telecom), I used to have their Fixed Wireless service called Metro which had a much lower cap of 30GB at the time but fast enough speeds. The cap has gone up recently on it to compete with other services but if you go over on Metro, you get throttled to dial up speeds until you fall under usage caps again for you last 30 days of usage. It was a bit of a pain at 30GB but they had 5GB margin of error on it but I still hit it too much and had to change provider.

I think it is a pretty fair system as long as the caps are high enough as standard as it allows users to have flat rate service unless they need that bit extra on some months.

Oh and there is little fibre in Ireland which is why speeds are so crummy. UPC offer faster speeds and pretty much no caps in areas they can cover for a flat fee but Ireland doesn't have the high usage from services like Hulu or Netflix because they aren't available to Irish users :(

J Hanks

Taxing broadband usage will never fly. All it takes is one broadband media company to bring suit against internet service providers for limiting their market exposure, a suit that most assuredly WILL happen in the not too distant future.

As long as the cost of streaming media remains lower to the consumer than the cost of contract services, Netflix and others are the future of media entertainment. Taxing innovation in the name of corporate profits only lasts for so long.

jomiku

Streaming video is an issue in an organization's network. People watch netflix at their desks & people share it on monitors. It's easy to cut it off but that may cause issue. Reducing bandwidth is desirable, particularly for people watching on a small monitor.

MByRppDiGw

If you go over your cap you are penalized in some fashion. If you never use your allotted bandwidth do you receive a refund? Of course not. This bandwidth "management" phase is complete hogwash. It will pass, but in the meantime we have to deal with the hypocrisy.

bampbs

I read, and don't own a TV, but I hear enough complaints to know that the cable companies are thieves. Netflix is tough competition for them, and doing all movie-lovers a great service. I hope the regulators keep an eye on how charging by usage proceeds.

zenix

Why don't internet companies just set an increasing tariff where you pay for every GB and as you use more, each extra GB becomes progressively more expensive? Seems like an easy way to make a lot of money out of people streaming video.

zenix

Why don't internet companies just set an increasing tariff where you pay for every GB and as you use more, each extra GB becomes progressively more expensive? Seems like an easy way to make a lot of money out of people streaming video.

willstewart

This could make sense.

You could also investigate the EyeTV netstream system we we have recently installed that streams satellite TV signals into the house LAN (wireless or otherwise). Then each PC/TV can also be a pvr - which achieves more or less the same effect without so much external demand.

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In this blog, our correspondents report on the intersections between science, technology, culture and policy. The blog takes its name from Charles Babbage, a Victorian mathematician and engineer who designed a mechanical computer.

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