Wirevolution

Mobile Unified Communications

Subscribe!

Archive for the ‘neutrality’ Category

Sharing Wi-Fi 2 – Atheros turns a cellphone into an access point

Monday, February 9th, 2009

There are several smartphone applications that allow a cell phone to act as a wireless WAN router and Wi-Fi access point, creating a wireless LAN with Internet access. For the (jailbroken) iPhone there’s PDAnet, for Windows Mobile there’s WM Wi-Fi Router and for Symbian there’s Walking HotSpot and JoikuSpot. Now Atheros has proposed to bake this functionality into their low power Wi-Fi chipset.

An idea that is as patent jargon goes “obvious to one skilled in the art,” can sometimes have obvious handicaps to one experienced in the industry. While exposing a broadband wireless data connection through a smartphone’s Wi-Fi radio is massively useful to consumers, it is unlikely to appeal to network service providers, who would prefer you to buy a wireless data card (and an additional service subscription) for your laptop rather than to simply use the wireless data connection that you are already paying for on your phone.

It will be interesting to see where this goes. I will be stunned if Atheros’ implementation appears on any phone subsidized by (or even distributed by) a wireless carrier, until they can figure out a way to charge extra for it. As Tim Wu says in his Wireless Carterfone paper (the Wireless Carterfone concept was promoted by Skype, and rejected by the FCC last April):

carriers are in a position to exercise strong control over the design of mobile equipment. They have used that power to force equipment developers to omit or cripple many consumer-friendly features.

The billing issue may not be that intractable. Closely related models already exist. You can get routers from Cisco and other vendors that have a slot for a wireless WAN card, and the service providers have subscription plans for them. More similarly, this could be viewed as a kind of “tethering” But tethering only lets one PC at a time access the wireless WAN connection – unless that PC happens to support My Wi-Fi.

Update: Marvell has announced a similar capability for its 88W8688 chip.

Transparency and neutrality

Wednesday, February 4th, 2009

Google and the New America Foundation have been working together for some time on White Spaces. Now they have (with PlanetLab and some academic researchers) come up with an initiative to inject some hard facts into the network neutrality debate.

The idea is that if users can easily measure their network bandwidth and quality of service, they will be able to hold their ISPs to the claims in their advertisements and “plans.” As things stand, businesses buying data links from network providers normally have a Service Level Agreement (SLA) which specifies minimum performance characteristics for their connections. For consumers, things are different. ISPs do not issue SLAs to their consumer customers. When they advertise uplink and downlink speeds, these speeds are “typical” or “maximum,” but they don’t specify a minimum speed, and they don’t offer any guarantees of latency, jitter, packet loss or even integrity of the packet contents. For example, here’s an excerpt from the Verizon Online Terms of Service:

VERIZON DOES NOT WARRANT THAT THE SERVICE OR EQUIPMENT PROVIDED BY VERIZON WILL PERFORM AT A PARTICULAR SPEED, BANDWIDTH OR DATA THROUGHPUT RATE, OR WILL BE UNINTERRUPTED, ERROR-FREE, SECURE…

Businesses pay more than consumers for their bandwidth, and providing SLAs is one of the reasons. Consumers would probably not be willing to pay more for SLAs, but they can still legitimately expect to know what they are paying for. The Measurement Lab data will be able to confirm or disprove accusations that ISPs are intentionally impairing traffic of some types.

This is a complicated issue, because one man’s traffic blocking is another man’s network management, and what a consumer might consider acceptable use (like BitTorrent) may violate an ISP’s Acceptable Use Policy (Verizon:”…it is a violation of… this AUP to… generate excessive amounts of email or other Internet traffic;”). The arguments can go round in circles until terms like “excessive” and “unlimited” are defined numerically and measurements are made. So Measurement Lab is a great step forward in the Network Neutrality debate, and should be applauded by consumers and service providers alike.

White Spaces Videos

Tuesday, October 21st, 2008

I found this “grass roots” video on Google’s Public Policy Blog. That blog also has some interesting posts on related issues by Richard Whitt and Vint Cerf.

Looking at this provoked me to go to YouTube and search for other White Spaces related videos. I was interested to find a coordinated (by Google) effort by the proponents of White Spaces, and on the other side basically nothing – just this incredibly lame video that takes 7 minutes to tell us that microphones are used in sports broadcasting (don’t waste your time watching more than a few seconds – it’s the same all the way through).

It’s odd that the main opponents of Whitespaces (NAB and MSTV) haven’t put rebuttal videos on YouTube yet, and even odder that they haven’t found a need to present any more thoughtful analyses of the issue, equivalent (but presumably opposite) to those of Chris Sacca or Tim Wu. Instead, I have the impression that their strategy rests on the two prongs of public fear-mongering and bare-knuckled political lobbying.

White Space update

Thursday, March 27th, 2008

The forthcoming transition to digital TV transmissions will free up about half the spectrum currently allocated to TV broadcasters. This freed-up spectrum was the subject of the FCC’s just-concluded 700MHz Auction, which yielded about $20 billion in license fees to the government. The fate of the other half of the TV spectrum, the part that will remain assigned to TV broadcasts after the digital transition, remains in contention.

This spectrum will be shared by licensed TV broadcast channels and wireless microphones, but even so much of it will remain mostly unused. These chunks of spectrum left idle by their licensees are called “White Spaces.” The advent of “spectrum sensing” radio technology means that it is now theoretically possible for transmitters to identify and use White Spaces without interfering with the licensed use of the spectrum.

The FCC has issued a Notice of Proposed Rulemaking and a First Report and Order to explore whether this is a good idea, and if so, how to handle it.

The potential users of the White Spaces have formed roughly two camps, those who see it best suited for fixed broadband access (similar to the first version of WiMAX), and those who see it as also suited for “personal/portable” applications (similar to Wi-Fi).

Google, along with Microsoft and some other computer industry companies, advocates the personal/portable use. The FCC’s Office of Engineering and Technology (OET) is currently lab-testing some devices from Microsoft and others to see if their spectrum-sensing capabilities are adequate to address the concerns of the broadcast industry, which fears that personal/portable use will cause interference.

Google filed an ex-parte letter with the FCC on March 24th, weighing in on the White Spaces issue. The letter is well worth reading. It concedes that in the introductory phases it makes sense to supplement spectrum sensing with other technologies, like geo-location databases and beacons. The letter asserts that these additional measures render moot the current squabble over a malfunction in the devices in the first round of FCC testing, and that the real-world data gathered in this introductory phase would give the FCC confidence ultimately to repeal the supplemental measures, and perhaps to extend open spectrum-sensing uses to the entire radio spectrum, leading to a nirvana of effectively unlimited bandwidth for everybody.

The kicker is in the penultimate paragraph, where Google recycles an earlier proposal it made for the 700MHz spectrum auction, suggesting a real-time ongoing “dynamic auction” of bandwidth. Google now suggests applying this dynamic auction idea to the white spaces:

For each available spectrum band, the licensee could bestow the right to transmit an amount of power for a unit of time, with the total amount of power in any location being limited to a specified cap. This cap would be enforced by measurements made by the communications devices. For channel capacity efficiency reasons, bands should be allocated in as large chunks as possible. The airwaves auction would be managed via the Internet by a central clearinghouse.

Current expectations are for spectrum-sensing use of the whites spaces to be unlicensed (free, like Wi-Fi). Now Google appears to be proposing “sub-licensed” rather than unlicensed spectrum use. The word “auction” implies that this could be a revenue producer for TV broadcast licensees, who received their licenses free from the government. This is a very different situation than the original context of the dynamic auction proposal, which applied to spectrum for which licensees paid $20 billion. Depending how it is implemented, it could fulfill the telcos’ dream of directly charging content providers for bandwidth on a consumer’s Internet access link, a dream that Google has opposed in the network neutrality wars. Google may ultimately regret opening the door to this one, even though it presumably sees itself cashing in as the ideal candidate to operate the “central clearinghouse.”

Update April 10th: Interesting related posts from Michael Marcus and Sascha Meinrath.

Open wireless networks for America?

Wednesday, January 23rd, 2008

David Hattey, CEO of FirstHand Technologies points out in an opinion piece on CNET that US mobile network operators may be opening up their phones to third party applications. He cites two announcements from last November: Apple’s announcement of an SDK for the iPhone, and Verizon’s “Any Apps, Any device” announcement.

This point was echoed in the New York Times article on the 700MHz spectrum auction that I wrote about earlier today:

The new rules have already begun to reshape the rapidly emerging wireless broadband industry. It prompted Verizon and AT&T to change their policies and open their networks to new applications and devices, just as Google and its allies had hoped.

“The issue has melted away,” Mr. Martin said. “It is no longer as controversial, as the major providers have moved to open up their networks.”

WSJ tells it like it is

Thursday, June 14th, 2007

There’s a great lead article in the Wall Street Journal this morning, explaining how cell phone manufacturers and cellular service providers have opposing interests concerning phone features and how they are delivered.

The article pitches the fight as one over which of these two will end up controlling the data services on the phone. The interests of consumers would be best served by neither of these outcomes. The essence of the Internet is its openness. Nobody controls the services. Ideally, the mobile model of Internet access will follow the wireline model, where neither the device manufacturer nor the Internet access provider exerts any control over the content of the network data packets.

Brough Turner on Network Neutrality

Wednesday, June 6th, 2007

The estimable Brough Turner has written at length on the topic of Net Neutrality.

The first thing to read on this topic is his blog entry “Why there’s no Internet QoS and likely never will be”. In this article he makes the point that the only place where QoS measures make a difference is in the access link, and that the best way to ensure access link QoS is by putting a traffic shaping device behind your broadband modem. So no need for anything from your ISP beyond what you already expect, namely bandwidth and uptime.

In this article, Brough advocates a long view, focusing on increasing last-mile bandwidth, pointing out the danger of unintended consequences of regulation. He makes the point that fiber is not a natural monopoly, in the sense that there is adequate revenue per square mile in moderately densely populated cities to sustain multiple runs of fiber to each home. He identifies rights of way restrictions as the real barrier to last mile competition. In a similar spirit, he advocates opening up spectrum for license-exempt operation for last mile access. This article has similar arguments.

In this later article, Brough backs off a little to what seems to me to be a better position, namely regulating dark fiber, and fostering competition above it.

By 2007, Brough had nailed his colors to the mast. In this review of Susan Crawford’s paper, “The Internet and the Project of Communications Law,” he says:

I’d really like to see a national strategy to get as much of the population on dark fiber as possible.

And just a couple of months ago, he proposed a way to do it:

…unfettered municipal experimentation by any of the 22,000 municipalities in the US and/or interested community groups.

So there you have it. A relatively simple, seemingly doable solution to Net Neutrality, implementable by the grass roots, thought through by a smart guy who knows the subject inside and out.

I’m aboard!

Cisco buys WebEx, loses faith

Saturday, March 17th, 2007

Cisco has two main customer constituencies: network service providers and business IT departments. One of WebEx’s crown jewels is its MediaTone network. This is a global private network, with dedicated fiberoptic links and multiple peering points to the Internet. If Cisco doesn’t sell this off, they will be competing with their customers in one of their primary markets. Unlikely to fly, though Cisco sometimes doesn’t seem to mind treading on toes.

This leaves the remainder of WebEx, the application (SaaS) side. It’s a natural complement to two of Cisco’s current business lines, filling a gap between their Unified Communications Manager (VoIP PBX) products and their high-end telepresence offerings.

As Cisco gets into more and more of the software services that run over IP networks, they end up competing more and more with Microsoft among others, and in an odd way for an Internet company.

Cisco rode the Internet Protocol to the stars. An article of faith amongst the IP cognoscenti is that the network must be stupid. This means that we conceive of the Internet as an amorphous connectivity cloud with computers on its periphery. Some of them are clients and some of them are servers. The Internet doesn’t care which is which. This is very powerful, because anybody with an IP address can set up a web site (a.k.a network service). This is anathema to the traditional network service providers who want to provide value (get revenue) in the network beyond mere connectivity. The Internet world (like Google) and the PC world (like Microsoft and Intel) love the stupid network model because it lets them innovate. The owners of the wires hate it because it forces them into the role of mere connectivity providers, since they are incapable of innovation at the service level.

But Cisco’s bread and butter is network equipment. Cisco doesn’t sell servers. So every service that migrates from the stupid network model to the intelligent network model increases Cisco’s potential market. Cisco hasn’t yet apostatized, but these actions are building gravitation in that direction. They have already ported their IP PBX to IOS, and they are allegedly even warming up to IMS!

Background
Forbes article on the acquisition.
CNET interview with WebEx CEO Subrah Iyar.

Network neutrality: free market vs. regulation

Tuesday, March 13th, 2007

Network neutrality is a contentious topic, particularly because billions of dollars of revenue hinge on the way it pans out. Because of these high stakes, partisans are motivated to use all the tools of rhetoric to argue for their positions. One way that the debate is commonly misrepresented is as one between regulation and the free market. It is actually a debate between more or less regulation. A free market is one where competition leads to abundant choice, and where consumers have the option to select one service over another. A monopoly is one where there is no choice, and consumers must take or leave what they are offered. Internet access is not a monopoly, but it is close, because of the limited number of suppliers in any particular location. The supposed purpose of network neutrality regulation is to preserve the current vibrant free market of internet services (services provided via the internet, as opposed to internet access service.)

There are several arguments against network neutrality. One is that it is impossible to enforce, that the Internet access providers will subtly strangle third party services by intentional incompetency if the regulators try to force them to stay open. This seems to be one of the ways that the CLECs were held off until the demise of UNE-P. A second one is that there is no need for regulation because there is no threat to third party services. This argument points out that the commercial Internet has been going strong for over a decade, so why fiddle with it when it is working so well? The rebuttal to this argument is that Ed Whitacre, CEO of AT&T has famously said that they intend to double charge providers of services over the network like Google: once for their own internet access like now, and a second time for their customer’s network access, additional to the one that customers are already paying for their own internet access. If the access providers succeed in this it will become much harder for small companies to offer new services on the Internet.

Another anti-network neutrality regulation argument is that network neutrality is good, that we have it now, and that any Internet Access Provider that tries to mess with it will get savaged by customer opinion and lose customers to competitors who keep their network open. This argument assumes that there is a free market in Internet access, and that a move by the telcos to double-charge service providers will not be immediately echoed by the MSOs. Or in a slightly modified version, it assumes that if the telcos and MSOs jump on this together, public outcry will force immediate regulatory reversal, so why try to fix something that ain’t broke yet?

Putting on the other hat, the access network operators have poured and continue to pour billions of dollars a year into upgrading their networks. They certainly deserve a fair return on their investments. The problem is that competition is so vigorous that neither the telcos nor the MSOs can afford to raise their rates to pay for all this build-out. But service providers (Google) have cash coming out of their ears, and they would happily share some of it in exchange for guaranteed priority of their content on congested networks.

OK, let’s take that hat off again. While Google does indeed have money coming out of its ears, and probably could afford to send some of it the way of the access providers, what about service providers with no spare cash, in other words, startups? The Internet has been a hothouse of innovation because of its spectacularly low barriers to entry. It costs virtually nothing to set up a new Internet service. Loss of network neutrality would shut down this innovation, because the telcos and MSOs would get to decide which of these services survived. Their track record at this stinks. If they had an inkling how to do it there would be no Google, UTube, MySpace or eBay, because the telcos would have put services like this into place 20 years ago. But they didn’t. Large companies are structurally incapable of this kind of radical innovation, while a vibrant free market does it naturally. This is because evolution by natural selection is a far more potent force than executive edict, and “let a thousand flowers bloom” is a vastly more fertile approach than “let’s not do anything risky.” Looked at this way, the telcos’ presentation of tiered service as “free market” rings hollow.