Email Delivery

Receive new posts as email.

Email address

Syndicate this site

RSS | Atom


About This Site
Contact Us
Privacy Policy


November 2010
Sun Mon Tues Wed Thurs Fri Sat
  1 2 3 4 5 6
7 8 9 10 11 12 13
14 15 16 17 18 19 20
21 22 23 24 25 26 27
28 29 30        

Stories by Category

Basics :: Basics
Casting :: Casting Listen In Podcasts Videocasts
Culture :: Culture Hacking
Deals :: Deals
Future :: Future
Hardware :: Hardware Adapters Appliances Chips Consumer Electronics Gaming Home Entertainment Music Photography Video Gadgets Mesh Monitoring and Testing PDAs Phones Smartphones
Industry :: Industry Conferences Financial Free Health Legal Research Vendor analysis
International :: International
Media :: Media Locally cached Streaming
Metro-Scale Networks :: Metro-Scale Networks Community Networking Municipal
Network Types :: Network Types Broadband Wireless Cellular 2.5G and 3G 4G Power Line Satellite
News :: News Mainstream Media
Politics :: Politics Regulation Sock Puppets
Schedules :: Schedules
Security :: Security 802.1X
Site Specific :: Site Specific Administrative Detail April Fool's Blogging Book review Cluelessness Guest Commentary History Humor Self-Promotion Unique Wee-Fi Who's Hot Today?
Software :: Software Open Source
Spectrum :: Spectrum 60 GHz
Standards :: Standards 802.11a 802.11ac 802.11ad 802.11e 802.11g 802.11n 802.20 Bluetooth MIMO UWB WiGig WiMAX ZigBee
Transportation and Lodging :: Transportation and Lodging Air Travel Aquatic Commuting Hotels Rails
Unclassified :: Unclassified
Vertical Markets :: Vertical Markets Academia Enterprise WLAN Switches Home Hot Spot Aggregators Hot Spot Advertising Road Warrior Roaming Libraries Location Medical Public Safety Residential Rural SOHO Small-Medium Sized Business Universities Utilities wISP
Voice :: Voice


November 2010 | October 2010 | September 2010 | August 2010 | July 2010 | June 2010 | May 2010 | April 2010 | March 2010 | February 2010 | January 2010 | December 2009 | November 2009 | October 2009 | September 2009 | August 2009 | July 2009 | June 2009 | May 2009 | April 2009 | March 2009 | February 2009 | January 2009 | December 2008 | November 2008 | October 2008 | September 2008 | August 2008 | July 2008 | June 2008 | May 2008 | April 2008 | March 2008 | February 2008 | January 2008 | December 2007 | November 2007 | October 2007 | September 2007 | August 2007 | July 2007 | June 2007 | May 2007 | April 2007 | March 2007 | February 2007 | January 2007 | December 2006 | November 2006 | October 2006 | September 2006 | August 2006 | July 2006 | June 2006 | May 2006 | April 2006 | March 2006 | February 2006 | January 2006 | December 2005 | November 2005 | October 2005 | September 2005 | August 2005 | July 2005 | June 2005 | May 2005 | April 2005 | March 2005 | February 2005 | January 2005 | December 2004 | November 2004 | October 2004 | September 2004 | August 2004 | July 2004 | June 2004 | May 2004 | April 2004 | March 2004 | February 2004 | January 2004 | December 2003 | November 2003 | October 2003 | September 2003 | August 2003 | July 2003 | June 2003 | May 2003 | April 2003 | March 2003 | February 2003 | January 2003 | December 2002 | November 2002 | October 2002 | September 2002 | August 2002 | July 2002 | June 2002 | May 2002 | April 2002 | March 2002 | February 2002 | January 2002 | December 2001 | November 2001 | October 2001 | September 2001 | August 2001 | July 2001 | June 2001 | May 2001 | April 2001 |

Recent Entries

In-Flight Wi-Fi and In-Flight Bombs
Can WPA Protect against Firesheep on Same Network?
Southwest Sets In-Flight Wi-Fi at $5
Eye-Fi Adds a View for Web Access
Firesheep Makes Sidejacking Easy
Wi-Fi Direct Certification Starts
Decaf on the Starbucks Digital Network
Google Did Snag Passwords
WiMax and LTE Not Technically 4G by ITU Standards
AT&T Wi-Fi Connections Keep High Growth with Free Service

Site Philosophy

This site operates as an independent editorial operation. Advertising, sponsorships, and other non-editorial materials represent the opinions and messages of their respective origins, and not of the site operator. Part of the FM Tech advertising network.


Entire site and all contents except otherwise noted © Copyright 2001-2010 by Glenn Fleishman. Some images ©2006 Jupiterimages Corporation. All rights reserved. Please contact us for reprint rights. Linking is, of course, free and encouraged.

Powered by
Movable Type

« Amtrak's Semi-Confusing Internet Access Message | Main | Southwest Starts In-Flight Trial Monday »

February 8, 2009

Femtocellarama: Carriers Opting for In-Home Base Station Offerings

Femtocells arrive: Femtocells are cellular base stations the size of typical home broadband modems and gateways, one step below office-building picocells, designed to enhance a mobile carrier's network in interior spaces. I've been skeptical of femtocells for the several years in which they've been discussed as the Next Big Thing Next Year.

Apparently, 2009 is next year. Sprint introduced its Airave last year, Verizon just released its Network Extender, and AT&T slipped up and revealed plans for its 3G MicroCell, which is apparently 2 to 5 months away.

Femtocells vary from VoIP over Wi-Fi (whether via T-Mobile's HotSpot@Home or Skype over Wi-Fi using a USB headset) in that they use licensed frequencies for the area in which the femtocell operates. There's no chance of collision with other users, which makes voice calls for all three operators and data calls for AT&T (the only one of the three to support 3G data) consistent.

Sprint and Verizon's base stations allow up to 3 simultaneous voice calls. AT&T allows up to 4 simultaneous 3G voice calls or data connections. Sprint and Verizon's femtocells work with all existing 2G-compatible handsets, which is pretty much everything; AT&T is restricting its femtocell to 3G for a lot of sensible reasons.

I've written extensively about femtocell announcements and some of the carriers' strategy over in my general tech reporting gig at Ars Technica, but let me run down how this fits into the wireless data world.

The purpose of a femtocell is, first and foremost, to reduce a carrier's churn rate and increase ARPU (annual revenue per user). A femtocell could allow this by providing you coverage in a currently poor area in your home or even an otherwise badly covered neighborhood. If the coverage is good, you'll use your service more, potentially incurring overage rates (on a standard plan) or by paying a fixed additional amount per month for more minutes or an unlimited home usage plan (AT&T, Sprint).

Happy customers with great indoor coverage don't abruptly switch carriers. In fact, such customers are then more likely to convert the rest of their family to the same carrier, if they were holding out, to gain the benefits of family plan discounts, and potentially cut off their landline.

For AT&T and Verizon, losing a landline isn't a bad deal because landlines are tariffed in such a way that there's not much money to be made from them. (Add-on services, yes; plain POTS, no.) In AT&T and Verizon's home territories, they can be making money selling someone broadband and selling them femtocell service for the same-branded wireless offering. So far, there's no indication that there will be cross-offering subsidies.

The biggest two problems with femtocells are the cost and a required location awareness. Femtocells are being sold by Verizon for $250 (one-time fee) and by Sprint for $99 with a $5 per month usage fee (forever). AT&T's pricing hasn't been set, but it's likely to be more like Sprint's.

Verizon isn't cushioning the blow by offering any calling deals. Both Sprint (currently) and AT&T (future) offer unlimited calling plans when using the femtocell. Sprint adds $10 per month for an individual cellular plan and $20 per month for a family/multi-line plan.

Most calls at home are likely to be made within the evening and weekend rate period, so this may be gravy for Sprint and AT&T regardless. The biggest winners would be parents who have teenagers calling a lot during early-release, early-evening, and vacations; or small businesspeople using cell plans to avoid racking up long-distance charges.

Sprint and Verizon are focused on extending coverage, and both allow other parties to make calls over the femtocells. Sprint lets a subscriber block this out by specifying up to 50 registered phone numbers. Verizon also allows blocking (through what seems like a more cumbersome process than Sprint), but reserves the right to allow one unused call slot to be used by an unregistered user who can't connect to a cell base station. Given that call slots are about 40 Kbps of usage, that's not horrible, but it's a little tacky, isn't it?

T-Mobile's offering, in contrast to these femtocell services, relies entirely on Wi-Fi, but requires a customer to switch to a handset that supports unlicensed mobile access (UMA), which allows seamless call handoffs between a GSM and Wi-Fi radio connection. To the cell network, the calls appear identical, but a lot of fancy footwork has to happen in the phone and on the backend to make UMA work.

T-Mobile charges about $50 for a router with the latest Wi-Fi voice enhancements, and they offer a landline replacement service, too, that can be found in a single router. Handsets aren't more expensive than their non-UMA equivalents, although there are many fewer choices. T-Mobile charges $10 per month for 1 to 4 lines for unlimited hotspot calling, whether from a home or any T-Mobile hotspot or roaming partner hotspot, as well as from any other networks to which a handset can authenticate.

The advantage for T-Mobile has to do with the second femtocell problem: location awareness. Because femtocells use licensed frequencies that are limited by geographic regions, they must also contain GPS technology. GPS receivers work poorly inside. Without a GPS receiver, a femtocell could operate illegally. This also prevents femtocells from being used outside a given country. T-Mobile has no such limitation with Wi-Fi, and I know of some users who have taken their HotSpot@Home gateway overseas while traveling.

Given that femtocells only need find their location once each time they're powered up (assuming they're moved only occasionally), you'd think this wouldn't be too big a problem, until you realize that a 30-foot GPS antenna is included with the femtocells currently being sold.

That makes it a bit of an issue. I wrote today over at Ars Technica about Rosum, a firm that can assist weak GPS reception by using a television-frequency receiver to triangulate fairly precisely indoors, exactly where femtocells are likely to be found.

But this remains a big femtocell issue. Customers that can't get a GPS lock will be told that they can't use a femtocell, and will return the item.

Allen Nogee, an In-Stat analyst, released a report recently in which he speculated that the greatest savings to carriers would be to bundle femtocells in with broadband modems in markets they serve, where millions of customers would suddenly be extending Verizon and AT&T's cell networks, for a potential savings of up to $4 billion in averted network buildout costs.

Many commenters on my description of Nogee's report at Ars Technica said: What's in it for me? And they're right. For carriers to encourage the adoption of femtocells, there has to be a deal that doesn't involve irritaing setup (or a 30-foot antenna run), that's far cheaper than the hundreds of dollars offered now, and that has a real incentive, like unlimited calling at a low rate.

With all that carriers can save from femtocell deployment, they're going to have to give back a lot more to their subscribers than they're currently planning.