Archive for the ‘Tech Note’ Category

Bandwidth and QoS: Much ado about something

Friday, April 24th, 2009

The supposed top finding of a new report commissioned by the British telecom regulator Ofcom is that we won’t need any QoS (quality of service) or traffic management to accommodate next generation video services, which are driving Internet traffic at consistently high annual growth rates of between 50% and 60%. TelecomTV One headlined, “Much ado about nothing: Internet CAN take video strain says UK study.” 

But the content of the Analysys Mason (AM) study, entitled “Delivering High Quality Video Services Online,” does not support either (1) the media headline — “Much ado about nothing,” which implies next generation services and brisk traffic growth don’t require much in the way of new technology or new investment to accommodate them — or (2) its own “finding” that QoS and traffic management aren’t needed to deliver these next generation content and services.

For example, AM acknowledges in one of its five key findings in the Executive Summary:

innovative business models might be limited by regulation: if the ability to develop and deploy novel approaches was limited by new regulation, this might limit the potential for growth in online video services.

In fact, the very first key finding says:

A delay in the migration to [British Telecom’s next generation] 21CN-based bitstream products may have a negative impact on service providers that use current bitstream products, as growth in consumption of video services could be held back due to the prohibitive costs of backhaul capacity to support them on the legacy core network. We believe that the timely migration to 21CN will be important in enabling significant take-up of online video services at prices that are reasonable for consumers.

So very large investments in new technologies and platforms are needed, and new regulations that discourage this investment could delay crucial innovations on the edge. Sounds like much ado about something, something very big. Read the rest of this entry »

Understanding leverage, volatility, and the crash

Tuesday, April 21st, 2009

One can critique Nobel laureate Robert C. Merton’s work on a number of fronts, from the CAPM model to his involvement with the 1998 failure of Long Term Capital Management. And he still doesn’t get to the true source of the current crisis — monetary policy and an erratic U.S. dollar. But I found this MIT lecture useful in explaining how changes in asset prices can drive both instability and volatility in a highly non-linear, pro-cyclical way and confound all the risk and economic models. Merton also offers a simple method to swap risk and improve returns using right-way contracts. (Hat tip: Gordon Crovitz.)

Web 3.0, ctd.

Tuesday, April 14th, 2009

Three media veterans — Gordon Crovitz, Steve Brill, and Leo Hindery — give paid content, via micro-payments and related subscriptions, yet another shot. With iTunes and Amazon also doing their part to advance the model, will we finally get a break-through?

Apples and Oranges

Friday, April 10th, 2009

Saul Hansell has done some good analysis of the broadband market (as I noted here), and I’m generally a big fan of the NYT’s Bits blog. But this item mixes cable TV apples with switched Internet oranges. And beyond that just misses the whole concept of products and prices.

Questioning whether Time Warner will be successful in its attempt to cap bandwidth usage on its broadband cable modem service — effectively raising the bandwidth pricing issue — Hansell writes:

I tried to explore the marginal costs with [Time Warner’s] Mr. Hobbs. When someone decides to spend a day doing nothing but downloading every Jerry Lewis movie from BitTorrent, Time Warner doesn’t have to write a bigger check to anyone. Rather, as best as I can figure it, the costs are all about building the network equipment and buying long-haul bandwidth for peak capacity.

If that is true, the question of what is “fair” is somewhat more abstract than just saying someone who uses more should pay more. After all, people who watch more hours of cable television don’t pay more than those who don’t.

It’s also true that a restaurant patron who finishes his meal doesn’t pay more than someone who leaves half the same menu item on his plate. If he orders two bowls of soup, he gets more soup. He can’t order one bowl of soup and demand each of his five dining partners also be served for free. Pricing decisions depend upon the product and the granularity that is being offered. Read the rest of this entry »

40 years ago today

Tuesday, April 7th, 2009

Some good history on the evolution of the Internet. I especially liked Steve Crocker’s story about how he and his fellow early Internet developers would share ideas — not by email but by mail. Here’s Crocker’s first “Request for Comments” detailing networking protocols. Today there are some 5,000 RFCs.