Communications

eComm in Amsterdam ― shameless self promotion

I've just wrapped up a focused effort that delayed blogging and many other things.  As a result, I finally submitted the detailed description for my plenary slot at eComm Fall 2009 which will be happening in Amsterdam October 28th-30th.  My abstract is not up on the website yet, but hopefully the next few weeks will bring details on my talk and many others.  For now, let me just say my title is
   Stealth Approaches to Legislating Open Spectrum
in which I propose what I hope is a novel approach to dramatically expanding the capabilities and commercial success of license-exempt consumer devices.

This will be the first time eComm has been held in Europe but, based on the first two eComm conferences (2008 and Spring 2009), this is the meeting for the future of communications.  It's not a trade show and it's not a mass event.  Instead, it's three days of rapid paced information ― high level, insightful and non-commercial.  Even more important, the people are very, very interesting.  It's not cheap, but it costs less if you sign up now (especially if you sign up before July 21st).  What's more, because I'm such an enthusiast, and I'm on the conference's advisory board, I've been given a discount code.  For an additional 20% off type in "BroughTurner" as the eComm discount code, i.e. where the registration form says "Click here to enter a promotional code."

I hope to see you in Amsterdam in October.

Opportunity Doesn't Always Knock. Sometimes It Calls.

The mammoth telecom industry ― fixed and cellular ― is in the process of being re-written. You can stand on the side and be written into history or join with the growing community that's writing the future. Opportunities have never been so great ― to influence how humanity connects, communicates and collaborates and to profit from radical restructuring.

Open Spectrum slide deck is now on-line

Here's the slide deck I used at last Thursday's meeting of the Boston section of the IEEE Communications Society.

Open Spectrum - Physics, Engineering, Commerce and Politics

View more presentations from Brough Turner.

Among other things, I debunk the following spectrum myths:

• Spectrum is scarce
• 4G is the future of wireless
• Auctions drive efficient use of spectrum
• Spectrum utilization requires massive investments
• TV spectrum is “beach front” property

The full write up from the IEEE announcement:

Communications Society

7:00 PM, Thursday, May 14

The Open Spectrum Potential for Evolutionary and Revolutionary Technology and Business Solutions

Brough Turner; Founder and CTO at Ashtonbrooke and Chief Strategy Officer at Dialogic

In November 2008, the FCC voted unanimously to permit unlicensed wireless devices that operate in the empty "white space" between TV channels. Their “TV White Spaces” decision was the culmination of many years of proceedings, but it's just one step in a much larger discussion, commonly referred to as “Open Spectrum.”

Our use of radio spectrum is regulated under principles that were established in the 1920s, when radio spectrum appeared to be a scarce resource and frequency was the only reasonable basis for allocation. Today’s wireless technology vastly exceeds anything imagined in the 1920s and from physical principles we know that many, many orders of magnitude further improvement are possible. Already the application of new approaches in just a few slivers of spectrum has fostered new industries – WiFi, Bluetooth and more.

The presentation discusses the predecessors, potentiality, and directions for Open Spectrum, including:

• A brief history spectrum regulation from before the Radio Act of 1927 to today.
• Results from measurements of actual spectrum utilization in New York and Washington DC.
• An overview of "Open Spectrum" experiments to date, including “license exempt sharing” in the 900 MHz, 2.4 GHz and 5 GHz bands and different forms of "secondary use" including UWB, 3650 MHz and now TV White Spaces.
• The physics of propagation and its impact on the range of White Spaces services vs. WiFi, WiMAX, 3GSM and LTE.
• IEEE 802.11y protocols and the prospects for expanding secondary use beyond TV White Spaces.

Brough Turner is founder and CTO at Ashtonbrooke and Chief Strategy Officer at Dialogic. Formerly he was founder and CTO at Natural MicroSystems and NMS Communications. He speaks and writes on a variety of communications topics including 3G and 4G wireless tutorials. He presented most recently at the 4G Wireless Evolution conference in February. Brough is an electrical engineering graduate of MIT and has 25 years experience in telecommunications.

Open Spectrum ― I'm presenting at an IEEE meeting this Thursday

This Thursday evening (May 14th), I'll be discussing Open Spectrum at the May meeting of the Boston chapter of the IEEE Communications Society.  My working title:  Open Spectrum ― Physics, Engineering, Commerce and Politics.  This is a technical audience, so we'll touch the physics of electromagnetic propagation and examine radio engineering solutions as they stood in the 1920s, as they are today and where they're likely to take us in the coming decade.  But we'll also look at the politics of spectrum regulation and the commercial implications of recent developments.

Just to get your attention:

• We'll explain why the TV White Spaces (TVWS) won't be considered  "beach front spectrum" in the future, and
• Why the lasting impact of the FCC's recent TVWS decision may be what it does for "secondary access"

If you're in the greater Boston area and at all interested in spectrum policy or the commercial evolution of WiFi and other unlicensed technologies, please stop by. 

The meeting begins at 7 p.m. and the presentation soon after at the Verizon Labs, 117 West Street, Waltham. The meeting is preceded by an optional dinner at Bertucci's, Winter St, Waltham, at 5:30 p.m.  The meeting is open to all, but please let Paul Zorfass know if you plan to attend the dinner at Bertucci’s. Paul can be contacted at paul.zorfass@embeddedtrade.com.  More directions and details here.

Spectrum Transparency: Can the US catch up with France?

Richard Whitt has a good article, Taking stock of the nations airwaves, on the Google Public Policy Blog.  He focuses on the Radio Spectrum Inventory Act, a bill introduced in the US Senate by Senators John Kerry (D-MA) and Olivia Snowe (R-ME).

It's hard to argue spectrum policy if you can't actually determine who has what rights in which parts of the radio spectrum.  This bill is a start.

For a first cut at what we should aspire to, look at this site by the Autorité de Régulation des Communications électroniques et des Postes - the French equivalent of the US FCC.  Try typing in a frequency or a frequency range; then hit "Rechercher."

I haven't figured out how to determine who owns individual licenses to spectrum in France and, of course, that is critical.  The proposed US law, S.649, explicitly calls for such information to be gathered and made available to the public on a website.  Let's hope this passes.

I'm off to the Emerging Communications Conference in San Francisco

It's snowing in Boston and my American flight has been cancelled but Virgin America claims their 8:35am flight is going to leave on time.  So here I am in the Virgin gate area.  Wish me luck.

At this point there are a ton of people I'm hoping to hook up with at eComm 2009.  The agenda looks really good.  And, of course I'm looking forward to good discussions around two favorite policy topics: broadband access and wireless spectrum.

My talk on Wednesday is: Structural Bypass: A simple, proven path to “Real Broadband.”

While the US struggles to define "broadband," high speed Internet access (100 Mbps & above) is widely available at modest cost in several countries and quite a few more cities. So far, US political discussion has largely neglected these successes. Brough will point out what's common among diverse international success stories and propose a path for the US that has proven to work elsewhere, despite established monopolies and political processes dominated by vested interests.

On Thursday, I've organized a panel entitled:  Spectrum 2.0 - What's really happening?

WiFi, UltraWideBand and now TV White Spaces represent new commons-based approaches to radio spectrum regulation. While some advocate commons-based approaches for all wireless spectrum, that's hardly acceptable to broadcasters or the mobile phone industry. By questioning a diverse panel of industry experts, we will expose the roots of today's controversy - technical, commercial and political - and see what's likely to occur over the next two to five years and in the long term.

The panelists are top notch:  Richard Bennett, Maura Corbett, Peter Ecclesine, Darrin Mylet and Richard Whitt.

If you're attending, please say hello.

Wireless Tutorial slides posted

The slides we used for our four part Wireless Tutorial at the 4G Wireless Evolution conference in Miami last week are now up on the web.

History and Evolution of Mobile Radio

Part One covers the history of mobile wireless from the earliest days

to the latest 4G technology.

Part one is also available as a webinar recorded in 3 sections last fall.

IEEE Wireless Ethernet Keeps Going and Growing

Part two covers the IEEE wireless systems:  WiFi, WiMAX and more...

Mobile Broadband: New Applications and New Business Models

Part three covers emerging world of mobile broadband access and some of the applications it enables.

White Spaces and Open spectrum Issues

Finally, part four focuses on Open spectrum and the recent decision by the FCC to permit unlicensed devices to operate on unoccupied TV channels - the so called TV White Spaces.  In the end, there's alot more that will be possible eventually...

Sasha Meinrath has a good explanation of "Interference Temperature"

Sasha Meinrath is Research Director for the New America Foundation's Wireless Futures Program and will be one of the speakers at eComm 2009.  I've just read his comments in a recent interview by Lee Dryburgh on the eComm blog.  Sasha has a particularly good explanation of an arcane concept, interference temperature.

Why does this matter?  It's one way to open up otherwise assigned radio spectrum to new uses without impeding existing uses.  The FCC made an attempt to float the idea in 2003 but after much comment (and pressure from those with existing licenses), they backed off in May 2007.  It's still a good idea, so perhaps Sasha's explanation will help get it back on the table.

The second one that we've been fighting for, and have lost thus far, is what's called "Interference Temperature," which is that, in the same way, at a rock concert people in the audience can whisper, or yell for that matter, and not be disruptive to the concert itself, we want to see very low powered usage <permitted> on occupied channels.

The idea is, if you're sitting next to a 100,000-watt television transmitter and you want to utilize a device to connect your laptop computer to your television, fifteen feet away, you should be allowed to do that in the same space.

Thank you Sasha.  That beats all the gobbeldygook spouted between 2003 and 2007.

I look forward to talking with Sasha at eComm 2009 in San Francisco in March.

Best conference bet for 2009 ― eComm 2009, March 3-5, San Francisco

I attended a number of conferences in 2008, both interesting and not so interesting.  One conference stands out, for the range of interesting speakers and the variety of interesting people I met.  That was the first Emerging Communications Conference, eComm 2008, organized by Lee Dryburgh.  Many of talks from this conference are available on Slideshare and as podcasts on IT Conversations.

eComm 2009 is scheduled to take place at the San Fransico Airport Marriott, March 3-5, 2009.  I highly recommend you check it out.

This is not a trade show with vendors hawking today's products and multiple tracks full of vendor product pitches. 

Presenters have been chosen for the quality of their proposals:  is it new?  is it disruptive?  what will the audience learn?  (As an adviser, I've been in on those discussions).  Like last year, the format is one track spread over three days, with 15 minute presentations, 5 minute lightning presentations, panel discussions and social time.  It all adds up to a veritable fire hose of information.

There's a list of speakers here.  Major topics for 2009 (so far) include:

* Mobile Social Networking (MoSoSo)
* Open Handsets & the Open Ecosystem
* Both Voice and Video Evolution
* Convergence of Media with Personal Communications
* Open Spectrum
* Open Communication Platforms
* Leveraging Cloud Computing
* Social Computing
* Towards 4G Wireless
* P2P and Decentralization of Telecoms
* Communications enabling business processes, especially B2C
* New Forms of Contactability and Connectability
* Emerging Markets

And last, but by no means least, if you mention my name you get 20% off.  More specifically, if you enter the promo code "BroughTurner" (case-sensitive) at the appropriate point during registration, you'll get 20% off the registration fee.  This works now, while early bird rates are in effect, and I'm told it will also work right up to the last minute ("late", not on-site registration), although then it's 20% off the full conference rate, and only if the event is not sold out!

I hope to see you there.

TV White Spaces - Fundamentals misunderstood

The FCC's recent decision to allow secondary use of the TV bands by license-exempt devices is a political breakthrough we can all rejoice in, but the widely claimed technology benefits are at least partly bogus.

Here's a typical claim:

This is the same spectrum we have referred to as "prime beachfront property."  < ... >  These lower frequency signals lose less power as they travel, hence requiring fewer base stations to cover an area. They also feature far better penetration characteristics, which is key to improving indoor operation.

This is true of deployed systems today, but for engineering reasons, not due to the physics of electromagnetic waves.

Today, wireless technology is advancing at such a pace that higher frequencies, for example at 5 GHz, will be more useful than TV White Space, perhaps within the time it takes TVWS equipment to get widely deployed -- certainly within 5-10 years.  What's happening is MIMO and advanced MIMO driven by emerging WiFi (802.11n), WiMAX and LTE systems.  As these systems get developed and deployed, signals at 5 GHz will achieve similar or greater range than TVWS, similar or better building penetration, lower costs and substantially higher carrying capacity.

The reason buildings appear to attenuate high frequency signals (like 5 GHz) more than those in the TVWS bands is, as radio signals hit the different materials that make up walls, windows, furniture, and other building elements, they scatter (due to diffraction and reflection).  With conventional receivers, only the primary signal is detected while scattered signals appear as noise, degrading the received signal.  Shorter wavelength signals are scattered by smaller objects and thus by more of the building's elements.  The higher the frequency the shorter the wavelength, so it's higher frequencies that experience more scattering.  But if you have multiple antennas and multiple receiver channels (MIMO), you overcome scattering.

Indeed with MIMO, the tables are turned.  MIMO systems use multiple antennas, typically separated by several wavelengths, or beamforming with many antenna elements each separated by 1/2 wavelength, but that's a problem for TVWS sysems.  At 5 GHz, a wavelength is 6 cm or just over 2 inches, but TVWS wavelengths range from 1.4 meters (55 inches) to 5.6 meters (over 18 feet).  Separating multiple antennas by several wavelengths is a problem at TVWS frequencies.  It might be feasible at a fixed base station but it's too bulky for a residential device and completely nuts for a laptop computer or a mobile phone.  So expect MIMO to be widely deployed at 5 GHz, but not so widely or not at all in the TVWS bands.

There are many other reasons why physics favors 5 GHz over the TVWS bands, but MIMO is the one place where engineering is catching up with physics as we speak.

iPhone, Android, 700 MHz — What maximizes wireless innovation?

At the Emerging Communications Conference eComm 2008, I'm moderating a panel "Wireless Innovation, with or without operators."  This will be a discussion — smart people from differing camps responding to (hopefully) probing questions from yours truly, and the audience.  Points of view represented include Google Android, J2ME/JavaFX Mobile, iPhoneWebDev.com, Skype and Trolltech Qtopia (Nokia), plus Chris Sacca, formerly head of Google's wireless initiatives.  I've been thinking about subjects and questions for the panel.  As a start, I'll set down my current views, then seek others' views and questions.

2007 Breakthrough — Public discussion of "Open" wireless networks

For the first time ever, US mainstream media is talking about open handsets and open networks.  It started with the iPhone launch in June, as people discussed pros and cons of the Apple-AT&T lock in.  Then Google proposed, and the FCC partially adopted, a set of open access criteria for the 700 MHz auctions that are currently in progress.  Finally, speculation about a G-Phone got resolved when Google announced the Open Handset Alliance and Android open source mobile phone software.

What's Next?

In the near term, we won't see open wireless Internet access at 700 MHz — that will take years.  The 700 MHz spectrum doesn't even become available until analog TV is turned off (scheduled for February 2009).  Then building out a network takes time, independent of whether it's WiMAX, HSDPA, EVDO or LTE.  And at this point, neither base stations nor mobile devices are available for the 700 MHz band.  Vendor's will talk a good story, but are unlikely to make major product investments until they know they have orders in the pipeline.

There are two areas that should drive innovation in the US wireless market over the next 24 months.

• Affordable open mobile Internet access as a result of competition, i.e. in advance of 700 MHz
• Further innovations in the handset space

Open mobile Internet access in advance of 700 MHz services

As I've pointed out elsewhere, US competition to offer mobile Internet access is about to ratchet up significantly, as T-Mobile USA uses the spectrum they acquired in the 2006 AWS auctions to go head-to-head with AT&T, Verizon and Sprint.  In 2006, T-Mobile USA spent more than $4B to buy additional spectrum that will allow them full national coverage. Then they committed another $2.7B to build out 3G mobile coverage on this spectrum.  Recently, they've disclosed $10B of investment for 2007-2009.   In addition to these four cellular networks, there's at least the threat of a national WiMAX network, between Clearwire and/or Sprint.  Finally, WiFi access points continue to proliferate.  Four plus competitors is enough to unbalance a market, so it's likely we'll see affordable flat rate data bundles that are effectively open access at some point in the next 24 months.

Handset innovation

Here's the real excitement, at least in the next 24 months.  The iPhone is truly a break through device, if nothing else it's the first mobile Internet browser that really works.  Every other handset vendor has embraced iPhone concepts and is scrambling to bring out their own next generation devices.

Meanwhile phones based on the Android stack should show up later in 2008.  During the next 24 months we'll see if the Google initiative has a significant impact on handset software.  Remember, Google doesn't have to make money on their software (as Microsoft does with Windows Mobile) or on handsets (as Nokia does with Symbian).

Finally, there's an open question of where, in the handset stack, maximum innovation will occur.  John Puterbaugh distinguishes five layers where innovation might occur:

1. Operating Systems and Mobile Platforms - Symbian, RIM, Windows Mobile, Palm, Java FX Mobile, Android, LiMo
2. Application UI Frameworks - Series 60, Qtopia, uiONE, GNOME / GMAE, KDE, GTK
3. Runtime environments - Java, JavaScript, Flash, BREW, and various Mobile Internet Browsers
4. Media Players - Windows Media Player, Quicktime, Real, Ogg Vorbis
5. Applications - Celltop, Yahoo! Go, Nokia WidSets, and various Mobile AJAX “players”

I might have separated out mobile Internet browsers and mobile AJAX as an area that deserves a layer of it's own, but you get the idea.  Yes, there is no single answer for mobile application development and that's a problem, but it's also prompting an enormous amount of competition and innovation.

Do you have questions for the panel?

I look forward to a lively discussion at eComm 2008 in Mountain View California on March 14th and hope to see you there.

In the spirit of full disclosure, NMS Communications is a member of, and contributor to, the Open Handset Alliance, primarily through our LiveWire Mobile subsidiary.  But then we're also active in various GSM Association working groups including contributing to the GSMA's (IMS-based) Video Share Project and we've delivered IMS handset software for Symbian, Windows Mobile and several other environments.