Reader Question: Is Someone Jamming My WiFi?

I recently received the following email message from a reader:

Hello,

I read some of the information you provided regarding Internet signals getting jammed intentionally and otherwise. Perhaps you can shed light on an issue. When our neighbors are NOT home, I can use a PC with wireless internet (set up in a room of my home facing their home) without ever getting knocked off the internet. When they ARE home, the signal repeatedly is lost. However, A laptop in another part of the home is rarely affected.

So I set up the laptop in the PC room and lost signals (when neighbor was home) on both machines (Provider rep. suggested I do this). Neighbor walks dog or otherwise is not on their property and there is no issue with signals. AND it is random. Usually neighbor comes in for lunch break and the Inet signal is lost.

Home from work and it is lost. I unplug wireless and it comes back. On and off. This is a new development (maybe two months. After the local police informed said neighbors to stop calling 911 to report bogus complaints on us, the signals began to drop. So we believe after police warned them to stop wasting 911 resources, they got a jammer and jam our signals at every opportunity to harass us. (Honestly, this is our first and hopefully last neighbor war. We don't know why they hate us so much but have been informed they hate everyone so we try not to feel too special.)

Question 1 - How can we test or otherwise determine the signals are being jammed (we are sure they are but need proof) and pin point the source? Prove or show great reason why the source is illegal.

Question 2 - How can we protect the signal from getting jammed?

Thanks for your insight.

I've written here in the past about the jamming of cell phone, GPS and Wi-Fi signals. Here's some ideas and possible answers to the reader's two questions.

Question 1 - How can we test or otherwise determine the signals are being jammed (we are sure they are but need proof) and pin point the source? Prove or show great reason why the source is illegal.

The best way to confirm someone is jamming is to use something called a spectrum analyzer. Wireless frequency spectrum analyzers are commonly used measure signals and interference. You could spend thousands of dollars on a full blown analyzer from a company like Agilent or use a 2.4 GHz USB spectrum analyzer from a company like MetaGeek. The company sells a 2.4 GHz analyzer for $99 that comes with software that will run on both PCs and Macs. According to MetaGeek, this analyzer will track all radio activity from any 2.4GHz device including WiFi, cordless phones, microwave ovens, Zigbee and Bluetooth. The software that comes with the device also graphically shows which channels to use and which ones to avoid. Here's more of when you would want to use a device like this from the MetaGeek website:

• If you install, maintain, or troubleshoot access points, find the open channel and minimize the interference.
• If you work with consumers, avoid a revisit by using a Wi-Spy in case they own a microwave or cordless phone.
• If you experience WiFi interference on a regular basis, discover competing access points.
• Conduct site surveys.

You could purchase one of these and, attached to your laptop running on battery, walk around your home looking for jamming/interference signals. If you want to get up unto the higher frequencies where the 802.11n devices have the option of operating (802.11n can use both 2.4 GHz and 5 GHz frequencies.), it will cost you quite a bit more money to measure interference. MetaGeek sells something called the Wi-Spy DBx, a 5GHz analyzer, for $599 that also comes with software.

You may also want to first try KisMac or iStumbler on an Apple machine or NetStumbler on a PC. These applications run on the computer and give you access point information including channels being used. Sometimes just swapping a channel can fix interference problems. For example, if your neighbor is using channel 6 you may want to change your access point to use channel 11.

Question 2 - How can we protect the signal from getting jammed?

If your neighbors are jamming your signal with a well designed jamming device, determining and using an open channel on your wireless access point won't work. If the jamming has been going on for a while chances are the jammer they are using functions only at 2.4 GHz. I'm I think the best thing to try (if you are currently running a 802.11g network) initially would be to switch over to an 802.11n access point and upgrade to 802.11n on your computers. If you have newer computers that may have 802.11n support built in.

You could run the 802.11n network at the higher 5GHz frequency which would be immune to the lower 2.4GHz jamming signals. This would be an inexpensive attempt that would also give you the bonus of much better network bandwidth and immunity from other interference sources (e.g some cordless phones, microwave ovens, etc) in you home.

I'm looking forward to hearing if this works.

The FCC 700 MHz Auction Results Podcast

Mike Q and I recorded "The FCC 700 MHz Auction Results" podcast today. Below are the show notes. You can listen directly by turning up your speakers and clicking here. If you have iTunes installed you can get this one, listen to others, and subscribe to our podcasts by following this link.

If you don't have iTunes and want to listen to other podcasts and read shownotes using your web browser, turn up your speakers and click here.

Shownotes:

Intro: On March 18, FCC Auction 73 bidding round 261 ended and, after 38 days and $19.592 billion in bids (almost double the $10 billion the FCC had hoped for), the FCC closed out the auction. In this podcast we review and discuss the auction results.

Mike: Gordon, can you give us an overview of the auction results?
Sure Mike - this comes from the FCC auction website linked up in the shownotes.

Rounds: 261 (started on 1/24 and ended on 3/18)

Bidding Days: 38

Qualified Bidders: 214

Winning Bidders: 101 Bidders won 1090 Licenses

Auction 73 concluded with 1090 provisionally winning bids covering 1091 licenses and totaling $19,592,420,000, as shown in the Integrated Spectrum Auction System. The provisionally winning bids for the A, B, C, and E Block licenses exceeded the aggregate reserve prices for those blocks. The provisionally winning bid for the D Block license, however, did not meet the applicable reserve price and thus did not become a winning bid. Accordingly, Auction 73 raised a total of $19,120,378,000 in winning bids and $18,957,582,150 in net winning bids (reflecting bidders' claimed bidding credit eligibility), as shown above.

Mike: Before we get into the auction results, can you give us an overview of the different spectrum blocks? I know we've done this before but - how about a quick refresher?
Sure Mike - this comes from a blog I wrote back on January 14.

Back in 2005 Congress passed a law that requires all U.S. TV stations to convert to all digital broadcasts and give up analog spectrum in the 700 MHz frequency band. This law will free up 62 MHz of spectrum in the 700 MHz band and effectively eliminate channels between 52 and 69. This conversion, which has a deadline of February 18, 2009, has freed up spectrum that is being split up by the FCC into five blocks:

• A-Block - 12 MHz, split up into 176 smaller economic areas
  
• B-Block - 12 MHz, split up into 734 cellular market areas
  
• C-Block - 22 MHz, up into 12 regional licenses
  
• D-Block - 10MHz, combined with approximately 10MHz allocated for public safety, a single national license.
  
• E-Block - 6 MHz, split up into 176 smaller economic areas

So in summary, each spectrum block in the 700 MHz auction, except for the national public safely D-Block, has been assigned an area designation by the FCC.
All FCC areas, along with names, county lists, maps and map info data can be found on the Commission's website linked here.

Mike: How about a quick review of the D-Block again?
Sure Mike, this also comes from that January 14 blog:

The D-Block lately has been most interesting to watch. Early on it appeared Frontline Wireless would be one of the biggest bidders for D-Block spectrum - the company was setup for D-Block and had worked closely with the FCC on putting together specifications for the spectrum. Frontline built a formidable team including Vice Chairman Reed Hundt, who served as Chairman of the FCC between 1993 and 1997. The business plan, the organization, the technology seemed to all be in place........ On January 12 the company placed the following statement on their website:

Frontline Wireless is closed for business at this time. We have no further comment.

Another company, Cyren Call also looked like they were planning to bid on the D-Block Auction but did not.

What happen? Rumor has it Frontline could not attract enough funders - it seemed like a good investment - or at least you may think so up front. Many are now asking if the FCC's approach to solving the public safety inter-operability problem is in trouble.

Mike: OK, how about the results?
Here's a summary from the Wall Street Journal:

Verizon and AT&T accounted for 80% of the nearly $20 billion AT&T agreed to pay $6.6 billion for 227 spectrum licenses in markets covering much of the country. Verizon Wireless, a joint venture of Verizon Communications Inc. and Vodafone Group PLC, won 109 licenses for $9.4 billion.

Dish Network Corp., which bid for spectrum through Frontier Wireless LLC, did acquire a significant footprint, winning 168 licenses throughout the country for $712 million. Satellite-TV providers are looking for a way into the high-speed Internet business to better compete with cable and phone companies. But Credit Suisse analyst Chris Larsen said in a research note that the particular segment of spectrum Dish acquired would make it difficult for the company to offer interactive wireless broadband service. He said the company could use the spectrum to broadcast data or for on-demand video.

Google had indicated interest in a nationwide package of licenses before the auction, but it bid just high enough to trigger rules that will force winners of one segment of spectrum, known as the C-block, to allow any mobile devices and applications on their networks. Verizon won the lion's share of spectrum in this segment. Google had pushed for the regulation since its efforts to sell some mobile services had been stymied by major carriers, which traditionally have strictly limited the kinds of devices that consumers could use on their networks. Even before the auction had wrapped up, Google scored a victory as Verizon voluntarily agreed to open its network to devices it doesn't sell through its own retail network. Verizon released details of its new policy on Wednesday.

Mike: Were there any licenses that dod not get any bids?
There were 1,099 licenses auctioned and only eight did not receive any bids:

A-Block:

Lubbock, Texas
Wheeling, W.Va.

B-Block:

Bismarck, N.D.
Fargo, N.D.
Grand Forks, N.D.
Lee, Va.
Yancey, N.C.
Clarendon, S.C.

Mike: So, what will happen to these?
These licenses will need to be re-auctioned by the FCC. I'm guessing they were over priced, the FCC will end up dropping the re-auction minimum bid and they will end up going quickly.

Mike: What's going to happen with D-Block?
The Public Safety D-Block did not meet the minimum bid and the FCC will have to decide what to do. It looks like the FCC could go one of two directions for the re-auction - drop the price or change the requirements.

From the start, the public safety D-Block auction was seen as one of the biggest auction challenges...... I've expressed my opinion on the D-Block in the past........ the FCC still has some major work ahead before they can close this one out.

This comes from InfoWorld:

On Thursday, the FCC voted to de-link the so-called D block from the rest of the auction results. The D block was a 10MHz block that was to be paired with another 10MHz controlled by public safety agencies, and the winning bidder would have been required to build a nationwide voice and data network to serve both public safety and commercial needs. But the FCC failed to receive its $1.33 billion minimum bid for the D block, with the lone $472 million bid coming from Qualcomm.

The FCC has no plans to immediately reauction the D block, a spokeswoman said. Instead, the agency "will consider its options for how to license this spectrum in the future," the FCC said in a news release.

Mike: So, it looks like the big carriers won?
For the most part, yes. Kevin Martin had an interesting quote in an EFluxMedia piece though:

"A bidder other than a nationwide incumbent won a license in every market," FCC chairman Kevin Martin said hinting that it’s possible for a "wireless third-pipe" competitor to emerge in every market across the U.S. This would increase the competition and the first one to benefit from it will be the consumer.

Things still could get interesting!

FCC Awards First Piece of 700 MHz Spectrum

On November 19, theFederal Communications Commission awarded a 10 MHz piece of the 700 MHz spectrum to the Public Safety Spectrum Trust (PSST). PSST is a non-profit that was setup, according to PRNewswire, by the "national public safety leadership to oversee the creation of a nationwide wireless broadband network for public safety."

More 700 MHz spectrum will go up for auction starting on January 28th next year. Here's more from PRNewswire:

According to the FCC's Second Report & Order on the 700 MHz band, 10 MHz of the spectrum now held by the PSST will be combined with an adjacent 10 MHz of spectrum to be licensed to the commercial winner of the upper 700 MHz D Block auction. The 700 MHz auction is set to begin on January 24, 2008. Together, these spectrum assets will be used to create one shared nationwide wireless broadband network, which will provide commercial service for consumers, while maintaining a nationwide network for public safety, including priority access during emergencies.

GovernmentExecutive.com also had some good information on how this public safety piece of the spectrum will be used:

The new broadband network will herald a new era for public safety communications, supporting applications not readily available to first responders today, such as live, streaming video from the scene of a fire, said Alan Caldwell, senior adviser for government relations for the International Association of Fire Chiefs. He added that the broadband network also will allow first responders in a remote command post to access building drawings and diagrams and augment radio channels with VoIP phone calls over the network.

The network also could support telemetry channels, which monitor firefighters' vital signs and allow ambulance crews to transmit ultrasound images to clinicians at a remote hospital, where doctors can use the technology to determine whether a patient should be taken to a trauma center. "This could make mobile tele-medicine a reality," said Kevin McGinnis, PSST vice chairman and a program adviser to the National Association of State Emergency Medical Services Officials, which is part of the consortium of public safety organizations that make up the PSST.

It will be interesting to see who wins auctioned spectrum next year. We'll know more about who will be bidding in a couple of weeks - the FCC has set an application filing deadline of 6 PM on December 3, 2007.

You can download the PSST License (FCC-07-199) pdf here and watch FCC auction news here.

FCC Rejects 2155-2175MHz WiFi Proposal

On Friday the Federal Communications Commission released an order dismissing a couple of WiFi applications and petitions from M2Z Networks and NetFreeUS. M2Z's FCC petition is linked here, NetFreeUS's is linked here and the FCC rejection is linked here. The companies had proposed building a network using the 2155-2175MHz frequency band.

M2Z's petition seemed to get more press - let's take a look at it. M2Z proposed ad-supported "free" wireless Internet access at 384 Kbps downstream and 128 Kbps upstream.

[Most consumer Internet services provide more downstream (coming to you) bandwidth because the majority of traffic is coming downstream to you. Think about the way you "surf" - a short address typed in browser menu bar goes upstream to server and the then server sends an entire page of website content to you downstream. For this reason these kinds of services are referred to as "asymmetrical" - in fact the "A" in ADSL is short for "Asymmetrical".]

If you wanted more bandwidth or did not want the filters, M2Z proposed an upgrade to a 3 Mbps premium service for an unspecified cost. In return for use of the spectrum, both companies had proposed giving a percentage of revenue to the U.S. government. These petitions had been sitting at the FCC for a while with M2Z's at the FCC for over 16 months.

The FCC rejection document is interesting - it is good to see the level of attention and detail in it from the FCC. According to News.com:

The FCC said it wasn't persuaded that allowing a single company to control the slice of spectrum without first seeking broader comment on how the band should be used would serve the public interest. The regulators concluded that it's preferable to conduct their usual rule-making process to set parameters for the spectrum's use--a move that would begin "shortly," they said.

"Many have suggested that we should auction this spectrum, while still others suggest that due to the high demand for this spectrum we should consider unlicensed use of the band," FCC Chairman Kevin Martin said in a statement. "Each of these proposals has merit, and consideration of either would be inappropriately foreclosed by granting forbearance in this instance."

Regulators commented that the proposed bandwidth was relatively "slow" [I agree - a lot has changed in 16 months and.... it continues to rapidly change] and a consolidation of public interest groups, calling themselves the Media Access Project, had come out very strongly against the M2Z and NetFreeUS petitions. The group especially had First Amendment concerns with regards to content filtering [I agree with this concern also]. Here's a link to Media Access Project's position PDF.

It is unclear what the FCC will do with this spectrum - it could be auctioned or left unlicensed. The rejected companies do have the option of appealing the FCC decision.

****
Read Show Notes and listen to Mike Q and my latest Podcast titled Enterprise 2.0 linked here.
Podcasts also free on iTunes.
****