Glenn Fleishman at Tidbits
: "Apple’s implementation is technically capable of 1.3 Gbps. But as Apple notes at the bottom of the page, “Actual speeds will be lower.” I’ll say. In practice, I would wager that most home users and some business users will see only modest improvement in net throughput across their networks
." — Rob
WiSee is a reasearch project at the University of Washington; as described in this paper, it uses standard WiFi hardware to sense the location and movements of people within range of the signal. Using machine-learning, it maps specific interference patterns to specific gestures, so that it knows that -- for example -- you're waving your hand in the air. This gesture-sensing can be used to control various devices in your home:
WiSee is a novel interaction interface that leverages ongoing wireless transmissions in the environment (e.g., WiFi) to enable whole-home sensing and recognition of human gestures. Since wireless signals do not require line-of-sight and can traverse through walls, WiSee can enable whole-home gesture recognition using few wireless sources (e.g., a Wi-Fi router and a few mobile devices in the living room).
WiSee is the first wireless system that can identify gestures in line-of-sight, non-line-of-sight, and through-the-wall scenarios. Unlike other gesture recognition systems like Kinect, Leap Motion or MYO, WiSee requires neither an infrastructure of cameras nor user instrumentation of devices. We implement a proof-of-concept prototype of WiSee and evaluate it in both an office environment and a two-bedroom apartment. Our results show that WiSee can identify and classify a set of nine gestures with an average accuracy of 94%...
WiSee takes advantage of the technology trend of MIMO, the fact that wireless devices today carry multiple antennas (which are primarily used to improve capacity). A WiSee/WiSee-enabled receiver would use these multiple antennas in a different way to focus only on the user in control, thus eliminating interference from other people.
You may have heard Jill Lesser, Executive Director of the Center for Copyright Information, explain that America's six-strikes copyright punishment system would not harm open WiFi. Adi Kamdar explains why Ms Lesser's totally mistaken:
Termination may not be part of the CAS, but that's not the point—the program still uses "protecting copyright" as an excuse to seriously hinder a user's online experience. For example, CAS involves not just "education" but also "Mitigation Measures," such as slowing down Internet speeds to 256 kbps for days—rendering your connection all but unusable in today's era of videochats and Netflix.
Lesser doesn't think that's a problem. As she told the radio show On The Media: "The reduction of speed, which one or more of the ISPs will be using as a mitigation measure, is first of all only 48 hours, which is far from termination."
But that's 48 hours of lower productivity and limited communication across the globe, based on nothing more than a mere allegation of copyright infringement.
Don't Be Fooled: "Six Strikes" Will Undoubtedly Harm Open Wireless
The Electronic Frontier Foundation is stepping up its open wireless campaign, which encourages people and businesses to leave their Internet connections open to the public, and offers advice on doing this safely and sustainably. As EFF points out, most WiFi networks are latent for most of the time, and there are a million ways that leaving your network accessible to passersby or neighbors can really help out, from emergency access during disasters to the urgent need to send an email, look up a phone number, or check directions. EFF's Adi Kamdar writes,
We believe there are many benefits to having a world of open wireless. Two of the big ones for us have to do with privacy and innovation.
Open wireless protects privacy. By using multiple IP addresses as one shifts from wireless network to wireless network, you can make it more difficult for advertisers and marketing companies to track you without cookies. Activists can better protect their anonymous communication by using open wireless (though Tor is still recommended).
Innovations would also thrive: Smarter tablets, watches, clothing, cars—the possibilities are endless. In a future with ubiquitous open Internet, smartphones can take advantage of persistent, higher quality connections to run apps more efficiently without reporting your whereabouts or communications. Inventors and creators would not have to ask permission of cell phone companies to utilize their networks, both freeing up radio spectrum and reducing unnecessary barriers to entry.
This movement is just beginning, but in a sense it has always been around. People, businesses, and communities have already been opening up their wireless networks, sharing with their neighbors, and providing an important public good. We want this movement to grow without unnecessary legal fears or technical restraints.
Why We Have An Open Wireless Movement
The Verge reports
that US-based airline JetBlue will "roll out high-speed wireless networking in the first quarter of 2013," and that the service will be free for passengers. Instead of GoGo
, "which Jetblue derides as slow and unsatisfactory," the airline will use supplier ViaSat
. — Xeni
A Finnish court has ruled that merely operating an open WiFi access point does not make you liable for copyright infringements committed on your network. From the defense attorney's press release:
This alleged copyright infringement had taken place in a specific 12-minute
period in July 14 2010, a date when a summer theater play with an audience
of around hundred people was held at the premises of the former school
owned and resided by the lady.
The applicants were unable to provide any evidence that the
connection-owner herself had been involved in the file-sharing. The court
thus examined whether the mere act of providing a WiFi connection not
protected with a password can be deemed to constitute a
Crucially, the applicants also sought an injunction to prevent the
defendant for committing any similar acts in the future. Had the injunction
been granted, the legal status of various open WiFi providers would have
turned out extremely difficult, as rights-owners would have been provided
with a powerful legal weapon to shut them down in cases of similar,
arguably insignificant infringements by incidental visitors and customers...
Finally, the court concluded that the WiFi owner cannot be deemed liable
for the infringements actually committed by third parties.
Finnish court rules open WiFi network owner not liable for infringement
(Image: Warchalking, a Creative Commons Attribution (2.0) image from isaacmao's photostream)
Christopher sez, "We just released a 90 second animated video that explains why communities build their own broadband networks, often in competition with big cable. For those who want all the details, we just released a massive 75 page white paper examining 3 community fiber networks in depth - Chattanooga, Tennessee; Lafayette, Louisiana; and Bristol, Virginia that is available here."
Community Broadband Networks
Mathias Nitzsche had a nifty idea: using Wi-Fi network names to create a connection between the network's owner and those who spot it in their wireless networks list. His aptly named wifis.org site lets you pick a handle and advertise it through your network name, as in wifis.org/glennocschmidt. This creates an account for you on the site, and makes a Web form available at that address that sends email to your Google or Facebook email, whichever you used to create the registration. The visitor never sees your email address. (Nitzsche avoids having his own registration database, which removes some overhead and security risk associated with retaining passwords.)
I contacted Mathias to ask about privacy and security issues, as one might be concerned about email addresses being stored and the association of a Wi-Fi network name with such. He said (and his FAQ notes) that he doesn't reveal information to third parties. While he's based in Germany, his data and application is hosted in the Google App Engine in the United States.
I'd love to see a variant on this idea, in which an existing network name could be paired with a unique few letter long code that someone would then append to their network. Look up the code, and you'd get the same result. I admit Nitzsche's idea is neater, encoding the URL and the identifier all at once.
This is probably a good time to also mention WTFWiFi.com, the site that is to network names what Damn You, Auto Correct! is to rewritten text messages.
The New America Foundation's Open
Network Technology Initiative, a US State Department-funded project to build an "Internet in a suitcase" that can be dropped into repressive zones where protesters need network access and the state is trying to take it away. The project -- a very complex piece of technology -- has gotten to the point where it needs a live test, and lucky for the Open Technology engineers, Occupy DC is just down the street, and that's a great testbed.
The idea is that the system will automatically set itself up. Drop a unit near another unit and they’ll start talking to one another and trading data. Add another and all three will talk to one another. Add a thousand and you can cover a whole city. Then if one of those routers is hooked up to an internet connection, everyone on the network can connect. If that connection disappears, users can still try to update an application like Twitter or send e-mail to the larger internet and the outgoing notes will go into a holding pattern until the mesh network finds another connection to the greater net.
That’s harder to pull off in practice, even under ideal conditions — as anyone who’s tried to link even two Wi-Fi access points in their own home could attest. Now throw in the variables that the access points should work in urban and exposed environments, as well as protest zones like Tahir Square. You’ll want to protect dissidents with encryption and deniability. And you don’t want your beta-testers to be arrested or even killed because of a software bug. All together it’s the kind of challenge engineers like to call “non-trivial”.
“Finding a place to use the system is difficult,” Meinrath said. “Thank God for the Occupy movement.”
U.S.-Funded Internet Liberation Project Finds Perfect Test Site: Occupy D.C.
(Image: Brendan Hoffman/Wired.com)
In Airshark: Detecting Non-WiFi RF Devices using Commodity WiFi Hardware (PDF), researchers from U Wisconsin (Madison) document a firmware for WiFi access points that can detect and dynamically adjust to interference from vacuum cleaners, baby monitors, and other non-WiFi devices that operate in WiFi's radio spectrum. This kind of thing is the backbone of the theory of cognitive radio: devices that can use software defined radio, phased-array antennas, and cleverness to route around other devices in the band, which may, eventually, enable the a lot more data to occupy the radio spectrum. In Airshark's case, the cleverness is in using the wireless cards on the computers and other devices as a sensing array to triangulate on interference.
Airshark taps into the application programming interface of wireless cards used on access points to gather data about radio frequencies in the surrounding environment. The software has been trained to recognize signatures of various devices, and can pick them out from the ambient radio noise with more than 90% accuracy even if signals from multiple such devices are present.
False positives were .39% for environments with four or more interfering devices and using various signal strengths. The researchers found the rate was .068% for signals stronger than -80dBm. "We also found its performance to be comparable to a commercial signal analyzer," according to their research paper "Airshark: Detecting Non-WiFi RF Devices using Commodity WiFi Hardware."
Are you a busy professional attending an event at the Toronto International Centre? Be prepared to travel in time to an idyllic era when physically leaving the office made you unreachable by your colleagues and peers. Or, if you want to live in the modern era, be prepared to pay the whopping $99/day
for "ultra-lite wireless" service at the TIC (if you want to actually use the network in any meaningful way, you'll have to sign up for "extreme wireless" at $150/day).
Event-planners, beware -- your attendees will get gouged, reamed, and screwed if you come to TIC.
Most Expensive Wi-Fi Ever?
You may not realize it, but these are the waning hours of WiFi Day -- 8.02.11
Harold Feld from Public Knowledge sez, "Republicans have proposed forbidding the FCC from allocating any more 'unlicensed' spectrum for WiFi and other uses unless they give wireless companies the opportunity to buy exclusive licenses first. This would effectively mean the end of open spectrum, cutting off investment in the TV white spaces/'Super WiFi.' Public Knowledge has issued an Action Alert, asking those who care about the future of open spectrum and wireless competition to sign up to call their member of Congress on Friday, July 22 and tell them that America needs more unlicensed spectrum that everyone can use -- not just the big wireless companies that can spend billions on licensed spectrum."
Don't think it's worth the trade-off (less unlicensed spectrum and less wireless innovation for very little benefit to either the public or the government's bottom line)? Call your Member of Congress!
Don't Let Fox, AT&T and Verizon Buy Their Way Out of Regulation
We're making this as easy as possible by setting up a day of action this Friday, July 22. To participate, all you need is a mobile phone with the ability to send and receive SMS messages.* If you haven't already signed up for PK Mobile Action Alerts, take a moment to do so now. We'll contact you on Friday with instructions on how to take action.
This picture frame, made from an ancient Pentium II laptop, displayes images sniffed out of public WiFi connections: "Many coffee shops in Vancouver feature both local art and wi-fi, so why not combine the two?"
Wiretap picture frame
[Free Geek Vancouver via JWZ