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MIT Researches Map Cell Phone Usage

stlhawkeye writes "MIT researchers with the Mobile Landscape Projects have mapped a city based on cell phone usage. The article includes a map of Graz, Austria with a color-coded overlay indicating cell phone usage in various parts of the city. Using call origin and destination data, they are able to not only reverse-engineer a topographic map of the geography and landscape, but one of phone usage as well. The implications of the research have practical applications in law enforcement, emergency management, and traffic management. There are also, of course, privacy implications."

88 comments

  1. Invasion of Privacy by Anonymous Coward · · Score: 4, Funny

    Is anyone checking to ensure that the MIT engineers are not eavesdropping on your cell-phone telephone calls?

    1. Re:Invasion of Privacy by dshaw858 · · Score: 2, Funny

      Researchers at MIT may not be able to hear your cellphone call, but they have found a way to see it.

      Only CalTech's calls ;)

      - dshaw

    2. Re:Invasion of Privacy by Anonymous Coward · · Score: 3, Informative

      I work in cellular infrastructure design so I have a clue about what these researchers do & don't have available.

      They wouldn't be able to eavesdrop on your call given the type of data this article says they have available. They only have access to some of the call statistics (location, origination, termination, etc...) and are nowhere near the pipe that is carrying the bits that make up your voice or data.

    3. Re:Invasion of Privacy by CDMA_Demo · · Score: 3, Funny


      Caltech will probably release a map next week that highlights eavesdropping grad students at MIT campus.

    4. Re:Invasion of Privacy by negative3 · · Score: 5, Informative
      It depends on the standard; some are harder to eavesdrop on than others. Any fool with a 30kHz (even 10kHz will work) bandwidth FM demodulator and the proper tuner can get an analog cellphone signal with no problem (AMPS == Ancient Mobile Phone Service, and truly should be abandoned). This is effortless for a graduate student in digital communications. GSM presents a problem for eavesdroppers because all of the time slots are aligned at the base station - if the eavesdropper is not sitting at the base station the time slots could be horribly skewed & overlap or lag. CDMA presents even greater problems because time slots are not the issue but actually figuring out the spreading code, chip rate, etc. is a huge problem. But if this was done cooperatively with a service provider, I'd say that the chances are slight, especially after reading the first line of TFA: Using anonymous cellphone data provided by the leading cellphone operator in Austria, A1/Mobilkom. Do you think the data given to the students is the actual recorded calls? I'd expect it to be time of arrival and any available spatial data. So for now, let's leave the conspiracy theories to

      Another aspect: cell phone companies design their systems based on call density & concentration - this could have been real news a decade ago. It's standard practice now. I can draw the cell phone usage in a city if you answer a few questions: where are the rush hour routes? where is the business district? what are the peak rush hour times? You can get a much better picture by actually analyzing a lot of data but the fundamental result will be the same!

      --
      "Physics is to math what sex is to masturbation." - Richard Feynman
  2. Next up by Anonymous Coward · · Score: 1, Funny

    MIT researches why slashdot editors can't correct obvious spelling error. (Two verbs in a row? come on!)

  3. Reception... by TheOtherAgentM · · Score: 4, Insightful

    Maybe this can be used to carriers a general idea of where there reception is good and bad. Maybe then they'll believe me when I complain that they need more antennas.

    1. Re:Reception... by Bryansix · · Score: 1, Interesting

      Unfortunatly, I doubt many cell phone companies in the US actually care. Nor do they most likely keep such detailed information on where calls originate from. Even if they do it probably isn't in any usable format.

      WHat would be really useful is if phones automatically provided connection quality feedback. Like if you get one bar in an area consistently then the provider would know to look at that are to improve the signal or put up a new tower.

    2. Re:Reception... by Anonymous Coward · · Score: 0
      Unfortunatly, I doubt many cell phone companies in the US actually care.

      Oh boy, another typical /.'er spewing out an opinion that:
      • Nobody cares about
      • Is wrong
      • Is misspelled

      Don't worry, though, you're in good company. Most of the drivel that comes out in this worthless blog is just as pointless.
    3. Re:Reception... by Pembers · · Score: 2, Insightful

      The phone company has to keep records about where each call originated so that they can bill you properly. The network automatically keeps aggregate statistics about what's happened in each cell - how many times someone tried to make a call, how many calls connected, how many calls completed successfully, how many were cut off because of signal loss, that sort of thing.

      If they see a high rate of failure coming from one cell, they can tell the network to gather more detailed information about it for a while. The reason they don't do this automatically is because the data can add up to gigabytes per cell per day, and nearly all of it's useless. The difficulty isn't in parsing the data - I do that for a living - but in storing and analysing it quickly enough that the results aren't so old as to be irrelevant.

      Fixing problems of signal strength or quality can be just a matter of reorienting an antenna by a few degrees, but putting up a new tower in an area that already has one is not a trivial task. The kit is expensive, and they cost a lot to run. Most companies would want to be reasonably sure that the new tower will pay for itself. Then they have to find somewhere to put it. Then they have to persuade whoever owns the land or the building to let them put it there. Then they have to argue the case with the local authorities. Then they have to win over residents who think the tower will give them cancer and lower their property values...

    4. Re:Reception... by Anonymous Coward · · Score: 1, Informative

      Cellular infrastructure guy again...

      You better believe they care! One of our biggest problems is to help our customers keep the failed call attemps & dropped calls to an absolute minimum. There is tremendous competition between the infrastructure vendors in this area.

      The volume of data recorded for each call (or attempted call) is vast including cell site ID, cell sector the access was attempted on, received RF strength (by both cell site AND by the mobile and in much better resolution than those silly bars you see on your screen), RF quality measurements, system resources that were assigned to the call, etc... However, it is a fact that the RF environment is really ugly. You have multipath that changes constantly, line of site that is constantly partially blocked by buildings, trees (you should see what happens to call statistics when trees leaf out in the spring!!!), big trucks, etc... Depending on the cellular technology, you have more or less trouble with interference from other mobiles, your distance to the cell site(s), neon signs, & so on. Even your speed of travel can make a difference.

      It would cost way too much to have absolutely perfect coverage everywhere. Trust me, if anyone could pull it off, they would be bragging about it loud and long.

    5. Re:Reception... by Riddlefox · · Score: 1

      Hey, I'm not doubting you, just trying to satisfy my curiousity..

      Do they record when someone loses signal? For instance, my old apartment was horrible as far as reception went - I could get zero bars if I stood on my front porch, but couldn't be understood (though I could dial out). But if I went inside, I had no service at all. Can they distinguish between someone merely turning their phone off, and someone going into a completely dead spot?

      Of course, with Sprint, pretty much all of that city was a dead spot....

    6. Re:Reception... by stupid_is · · Score: 2, Insightful
      yup

      My telco (Orange in UK) refunds the cost of dropped calls, so if I'm wandering around and the call drops, I don't get charged. Also, when you turn your phone off, some signalling goes up to the network to tell them that.

      One thing no-one has touched on is that the operator also has the regulatory considerations to their coverage - they may be required to cover a certain square mileage / proportion of the population (certainly in 3G) which means that they may have to cover an area entirely populated with Luddites with no cell-phones. As you may guess, this gets quite expensive in hardware, so the radio planning is tweaked to the extreme to stretch coverage as far as possible in some places.

      (Note - I work on 3G, which the above applies to. I don't know how much regulation is present in 2G licenses. I wasn't that impressed with the article though - it seems they've just put a fancier GUI to present information that an operator would already collect)

      --
      -- Intelligence is soluble in alcohol
    7. Re:Reception... by Pembers · · Score: 1

      I should say that I probably don't have the whole picture. My expertise is in performance management, which is mainly concerned with ensuring that when someone wants to make a call, it connects successfully, and the network holds onto it until one party voluntarily hangs up. (My job really is to get that information in front of someone who knows what it means and what to do about it.) So when I say that some data isn't available, or isn't recorded, it might actually be in some other place that my customers aren't interested in.

      If you lose the signal while you're making a call, the data that I deal with will contain a record of that. If the network decides to pass your call over to a nearby cell - especially because the signal is weak or poor quality - the data will record that as well.

      Your phone monitors the strength and quality of the signal from nearby cells, to help the network decide which cell the phone should "camp" on. (This cell is the one it will first contact when you try to make a call.) This data would obviously help the company to find out where coverage is poor, but they don't routinely keep it - thousands of cells times thousands of measurements per phone per day times millions of phones means a lot of data to sift through.

      If you switch your phone off, the phone notifies the network of that, but this is more to help the network know that it should divert to voicemail when someone calls you. The network can't assume that you're switching your phone off because coverage is bad: your battery might be low, or you might not want to be disturbed for a while. I suppose the phone could send a similar message to tell the network that it was about to go out of coverage, but I don't believe that this happens.

  4. Link in article broken. by bluesoul88 · · Score: 5, Informative

    The correct address for MIT's "Mobile Landscape" project can be found here.

    1. Re:Link in article broken. by Bryansix · · Score: 2, Funny

      I can't believe that this article was posted with a broken link.

    2. Re:Link in article broken. by bluesoul88 · · Score: 1

      Shocking I know.

    3. Re:Link in article broken. by Anonymous Coward · · Score: 0

      I can't believe this wasn't caught by /.'s link verification script...??

  5. Red Peak by Anonymous Coward · · Score: 3, Funny

    The red peak must be a girls college...

  6. Geography... by someguy456 · · Score: 4, Funny

    I think the question on all of our minds right now is...

    What the hell are MIT researchers doing at Austria?!?

    /chose the wrong school

    //no wait, there are hot girls here

    1. Re:Geography... by MrAnnoyanceToYou · · Score: 1, Insightful

      Austrian girls are occasionally incredibly smoking hot, FYI. Two or three of the most beautiful women I've ever met were Austrian.

    2. Re:Geography... by Anonymous Coward · · Score: 0

      //no wait, there are hot girls here

      yeah, I'm sure you're getting a lot of action out there, whilst posting on /.

    3. Re:Geography... by just-a-stone · · Score: 2, Informative

      graz has been the cultural capital of europe back in 2003. since then, new media arts activities in and around graz are quite impressive.

      besides, the current saturation of austria's cell phone market is above 83%, mobilkom austria has a market share of ~41%. i think this provides a good situation for researchers.

      ... but the girls and the styrian beer are good reasons anyway.

  7. Nice images - anyone know what software they used. by Anonymous Coward · · Score: 0

    I have a need to display similar images for a presentation - any pointers in the software that made their pretty pictures would be appreciated.

  8. Good demographic info, too by Anonymous Coward · · Score: 3, Insightful

    In the figure in the original link, the big peak at the right rear is the location of the technical university. So, it shows that college students use cell phones heavily, which could never have been discovered otherwise. ; )>

  9. From TFA by max99ted · · Score: 3, Funny
    The research could also have implications for use in large-scale emergencies and for transportation engineers seeking ways to better manage freeway traffic.
    You mean better manage freeway traffic emergencies caused by people on their cell phones?
    --

    Please stop APK.. you're only hurting yourself.

    1. Re:From TFA by Anonymous Coward · · Score: 0

      I ride roughly 2000 mi/mo on a motorcycle. You would not belive the idiocy that I see on a daily basis which results from individuals on cell phones.
      From slow driving and stopping at green lights to erratic high-speed swerving and rapid turns into the path of traffic, drivers using cell phones are consistently the most dangerous individuals on the road.

  10. Privacy implications? by sploxx · · Score: 5, Insightful

    What are the privacy implications if the study only uses anonymized location data, i.e. "in this field of 100m x 100m", there is a cell phone which now moves to this field etc.?

    I think there are none. At least not any new ones than those implications by using cell phones at all.
    The data about who uses which cell when does exist already and it needs to exist, in the current state, at all times in the phone system (how would you route calls without this information?)

    Privacy concerns can surely be raised about storing such tracking profiles attached to particular persons. But just anonymized usage patterns?

    1. Re:Privacy implications? by cperciva · · Score: 1

      What are the privacy implications if the study only uses anonymized location data, i.e. "in this field of 100m x 100m", there is a cell phone which now moves to this field etc.?

      Not very much reduced. The set of mobile phones which frequently move between my home and the corner of the university where I work is very small.

    2. Re:Privacy implications? by sploxx · · Score: 1

      Not very much reduced. The set of mobile phones which frequently move between my home and the corner of the university where I work is very small.

      Therefore I said and also meant anonymized and not pseudonymized. I did not say 'phone ID# XYZ moved from A to B'.

      Of course, if this ID# XYZ is unique to the phone or the SIM card, correlation to other data may in some cases be possible.

    3. Re:Privacy implications? by cperciva · · Score: 1

      I said and also meant anonymized and not pseudonymized.

      Depending upon how many phones are in any cell at once, that might not make any difference.

    4. Re:Privacy implications? by Anonymous Coward · · Score: 0

      How about a reported position that would other wise be thought to be unoccupyable by a cell phone... or a cluster of cells in a location that would be considered unusual... a secret underground lair that shouldn't be... people sleeping in a forest... an unusually low amount of cell phone usage in a particular location: weak spots along a border.. looks like a stray is wondering away from the group... patterns for hostile advantages... a large portion of the dogs and healthy sheep will be tracked while the foxes will go stealth.. just things to think about

    5. Re:Privacy implications? by hcdejong · · Score: 2, Funny

      Easy. Just say "I solemnly swear that I am up to no good" and every mobile on the map will be neatly labeled.

  11. Library Usage Maps by Anonymous Coward · · Score: 2, Interesting

    The same sort of thing is also being done to map the usage of library books.

    1. Re:Library Usage Maps by mikael · · Score: 1

      I've always wondered what contour maps of property prices would look like, especially as they change over time.

      --
      Vintage computer adverts: http://www.vintageadbrowser.com/computers-and-software-ads
  12. Fremont in Seattle is not as Bright by WillAffleckUW · · Score: 2, Interesting

    The problem with a cell phone usage map of a tech city, let's say Seattle, is that some neighborhoods have evolved beyond cell phones - and even watches.

    I live in Fremont, Center of the Universe [or so our neighborhood is claimed as in many public artworks], which is a neighborhood in Seattle, one of the most heavily wired and unwired neighborhoods with DSL and Cable modem and Gigapops galore. Many of us have ditched our electronic cell phone tethers and gone phoneless - because we don't want to be bothered.

    We already have wireless on our blackberry's and/or laptops, or might have a pager at most (which includes a handy digital clock so no watch needed).

    But on a map like this we won't be shining brightly even tho we're more wired than the rest of Seattle, just because we can't be bothered by crufty cell phones.

    So, realize it's only a map of old-world cell technology and not a map of tech centers, since some ultra-techs are not bothering with clunky cell phones.

    --
    -- Tigger warning: This post may contain tiggers! --
    1. Re:Fremont in Seattle is not as Bright by Louisville_Clark · · Score: 0

      *Gasp*- He doesn't think digital watches are a neat idea anymore

      --
      Curiosity was framed. Ignorance killed the cat.
    2. Re:Fremont in Seattle is not as Bright by MoralHazard · · Score: 2, Funny

      Wait a goddamned minute. Since when does *not having a cellphone* make you COOLer??!!?? Is that all it takes these days?

      Get this, buddy: I didn't have a cell phone way back in 1997. That's right, I was too cool to have a cell phone before you were even cool enough to get one in the first place! Beat that!

    3. Re:Fremont in Seattle is not as Bright by Anonymous Coward · · Score: 0

      you realize your blackberry has a wireless signal right? Even if you don't get cell service on it?

    4. Re:Fremont in Seattle is not as Bright by Anonymous Coward · · Score: 0

      And your point is? I can certainly see how you are not as bright over there in Fremont if you see something titled "MIT Researche[r]s Map Cell Phone Usage" and spend that much text pointing out "So, realize it's only a map of old-world cell technology and not a map of tech centers". Really!? Something about mapping cell phone usage is about, gasp, cell phone technology and not something else? Those bastards! I guess that's why you're looking for work....

    5. Re:Fremont in Seattle is not as Bright by WillAffleckUW · · Score: 1

      Wait a goddamned minute. Since when does *not having a cellphone* make you COOLer??!!?? Is that all it takes these days?

      Sorry, you snooze you looze.

      It's like being vegan - that was hot ten years ago, but now it's old school.

      Now, if you were from the planetary system Vega, now that would be hot.

      --
      -- Tigger warning: This post may contain tiggers! --
  13. Re:HAPPY BIRTHDAY ZONK! by Anonymous Coward · · Score: 0, Funny

    Slashdot has editors?

    I am amazed! What do they do?

  14. cell phone usage by 101percent · · Score: 0

    speaking of cell phone 'usage', you should not own a cell phone because the are potential tracking devices.

    1. Re:cell phone usage by bluesoul88 · · Score: 1

      You should also not touch anything for any reason, at any time, ever as your DNA is a potential tracking device.

    2. Re:cell phone usage by 101percent · · Score: 1

      don't be silly. DNA is more a proof than a tracking device. you can't tell where someone is at this instant just by knowing their DNA. you can by knowing their cell phone information (i think its called ESN number).

    3. Re:cell phone usage by bluesoul88 · · Score: 1

      Como se dice sarcasm?

    4. Re:cell phone usage by zippthorne · · Score: 3, Funny

      Nobody cares where you go. Nobody cares where you are. Nobody cares about you. You crazy paranoid megalomaniac, they're not after you. They only care about important people. like me :)

      --
      Can you be Even More Awesome?!
  15. Whaaaa by tsotha · · Score: 4, Informative
    I work for a big cellphone company. The question I have is:

    Why are these people reinventing the wheel?

    We plot phone traffic patterns as a function of geography on a daily basis so we can make sure we have capacity where we need it. Hell, I could go to a plotter 25 yards from my desk and plot out a map very similar to the one in the article.

    Honestly, sometimes I chuckle at what academics think is cutting edge. Years ago a friend of mine from school was discussing "new" compensation algorithms for telescopes which were in fact over 20 years old to the people who've been working in satellite recon.

    1. Re:Whaaaa by Anonymous Coward · · Score: 4, Insightful

      Because you wankers won't give us your plans for making the wheel. Sure it's old news to you guys, but you're the only ones who know about it. If you published your work and opened up your technology, then this would be old news, but for the rest of the world outside your bubble, this is new and cool.

    2. Re:Whaaaa by tsotha · · Score: 3, Informative

      Well, the satellite stuff was probably classified, so yeah, I could understand that. This particular story, though, is just amusing. How did they think cellphone companies manage network coverage? Blind guessing and ouija boards? Also, in the US cell phone companies are required by law to pinpoint customer locations during an emergency as part of 911 service.

    3. Re:Whaaaa by Foamy · · Score: 1

      Ouija Boards? Why not!?

      I live in the dead center of San Francisco and can't get a decent signal in or around our apt. We've tried multiple carriers to no avail.

      Even with all those high tech resources apparently cell companies can't even get good coverage over a densly populated city measuring a whopping 7x7 miles.

    4. Re:Whaaaa by Illserve · · Score: 2

      Hey don't tar us all with that brush. I'm an academic, and while mobile phones aren't my business, the first thought that popped into my head when I saw this was that I could put that pretty picture together in one afternoon with matlab and a database of cell tower use.

      It's also great the way they take the same data and run it through 3 or 4 different graphing algorithms and proudly present them as different analyses.

      But the real culprits behind this are the funding bodies.

      They've obviously put money into this, so you can hardly blame the lab for spending a single afternoon to knock together justification for their grant, before turning back to their real research, which is probably more useful, but harder to explain to the grant review committee.

    5. Re:Whaaaa by andres-s · · Score: 1

      what's new is that it is all online in real time and publicly accessible to all.

      a.

  16. Brain Tumour by SidTheKid005 · · Score: 1

    Interestingly enough the mapping of the number of reported cases of brain tumour results in he same graph.

  17. Considerable by Ungrounded+Lightning · · Score: 2, Insightful

    What are the privacy implications if the study only uses anonymized location data, i.e. "in this field of 100m x 100m", there is a cell phone which now moves to this field etc.?

    There are considerable privacy implications.

    For example: Law enforcement might notice cellphone activity in an area where none is expected - and go see what's going on there. Result: The uncover SOMEthing (a rave, a tresspass, a hermit, a criminal enterpirse, a fugitive, a meeting of political dissenters, ...) and initiate action - like a search to find out more.

    Search without probable cause. Tainted.

    Search based on telephone call traffic analysis. (In the US, at least, law enforcement is NOT supposed to have any call connection information unless they have obtained it pursuant to a limited-time authorization which must be obtained only when there is probable cause to believe a crime is committed BEFORE the information is released to the police.

    Annoyance - or even busting - of innocents. (I.e. somebody out camping uses his cellphone a lot - like he's verbose or is reading email - and the cops are looking for drug farmers in that park and come by to search his campsite. And perhaps looking bad because they've now done this twenty times without finding anything and/or because the guy "looks guilty" they decide to plant something on him. Or the poor sap happened to set up camp twenty feet from a pot grower's garden...)

    The very existance of that map may be an invasion of the privacy of the cellphone users in the area.

    Another poster asked: "What the hell are MIT researchers doing at Austria?!?" Perhaps they were there because they couldn't get the data HERE due to our privacy laws.

    --
    Bantam Dominique roosters crow a four-note song. Once you've heard it as "Happy BIRTHday" you can't NOT hear it that way
    1. Re:Considerable by BrokenHalo · · Score: 2, Insightful
      Perhaps they were there because they couldn't get the data HERE due to our privacy laws.

      If the "here" to which you refer is America, I would probably take Austria's privacy laws over yours, if given the choice. Given how the US administration is taking the so-called "war on terror" hype as such an excellent excuse to cancel any right to privacy, I'm not sure the US is a place I'd want to be. Of course, it doesn't help that other governments (e.g. Australia, Britain) are gleefully following suit...

    2. Re:Considerable by nolife · · Score: 1

      The very existance of that map may be an invasion of the privacy of the cellphone users in the area.

      Looking at that map, can you give my any single piece of information about any single person in that area based on what is contained in that map? Do you think anyone else could?

      Some of your examples of how privacy is already breached by the existance of that map are not because of the map but what others could do with this mapping technology. The same could be claimed about any video camera or tape recorder that could be placed in those same fields and camp areas as well. The technolgy and this map are not to blame IMHO.

      To be honest, I have not had time to fully think this out and determine for myself if I think this really is a privacy issue at its current state or not but what I stated above is a already causing me to lean towards probably not but it could be but that is a different issue apart from the technolgy itself.

      --
      Bad boys rape our young girls but Violet gives willingly.
    3. Re:Considerable by Kadin2048 · · Score: 3, Insightful

      I think that your conclusion -- that there might be some significant privacy applications here -- is correct, but your examples are weak.

      I see no reason why aggregate, anonymized call origination data couldn't be used by police. In particular the example about police noticing an inordinate amount of calls from a location where there normally aren't any. I don't see any privacy violation in this.

      Imagine that instead of looking for cell phone calls, which are electromagnetic waves being blasted into the ether, the cops were looking for visible light. They drive by a big abandoned farmhouse and notice lots of lights on. This doesn't give them probable cause to search, but it does give them a reason to knock on the door and ask for permission to search. And if, like many abandoned buildings, the property owner has previously informed the police that the building is posted against trespassing and unoccupied, they may be within their rights to walk right in unannounced, depending on the local laws.

      This is no different from the cell phone case. Only in one situation they're seeing visible light, in the other it's electromagnetic radiation produced by two-way radios (that's what your cell phone is, after all). They can't enter and search a house based ONLY on this, obviously, just like they couldn't if it was just light emanating from the building. If they then went to investigate though, and found probable cause, or were given permission to search, any resulting arrests would not be "tainted."

      The only way the privacy violation would come into play would be if the police, without a warrant or wiretap order, used the unique identification number of your phone plus the network's location data to put you at a certain location at a certain time. That, I think, would be obviously inadmissible, unless the records were kept by the carrier as a matter of course and obtained by a legitimate subpoena after the fact.

      The difference, imo, is when an individual is being singled out for close observation and monitoring, versus when the data is being used anonymously and in aggregate. To come back to the original example of the rave/clandestine meeting/meth lab in the abandoned building, if the police saw that suddently there were 20 active cellphones where for the last year there have been zero, and decided to drive by and check it out, that's perfectly fine. But if they come and arrest you for trespassing because YOUR cellphone was operating from within said property at 2:43 AM last night, when there wasn't a warrant or wiretap order from a judge outstanding already, that's clearly not.

      I am, of course, a nobody, so there's no reason my opinion counts for anything. However based on previous rulings concerning things like infrared observation from aircraft (to look for buildings that are being used as industrial marijuana growing operations), I wouldn't be surprised if what I just outlined is how things eventually work out.

      --
      "Ladies and gentlemen, my killbot features Lotus Notes and a machine gun. It is the finest available."
    4. Re:Considerable by gumbi+west · · Score: 2, Insightful
      Sorry, so you think that you should be able to carry around a radio transmitter, on and broadcasting, and the other people shoulnd't be able to look for it?

      Where is the reasonable expectation of privacy? The only way I see reasonable expectation of privacy is if a law is specifically passed that says that you have it, and I could see this come to pass if everyone gets cell phones and uses them primarily. But until then, your claim is about as odd as asking other people not to notice the RF equivalent of flashlight strapped to your head.

    5. Re:Considerable by mtz206 · · Score: 1

      The only way I see reasonable expectation of privacy is if a law is specifically passed that says that you have it Wow, that's a very strict interpretation of the "reasonableness" test.

    6. Re:Considerable by gumbi+west · · Score: 1

      Can you tell me what you think is reasonable about using a light and expecting others not to look for it's glow? I'm not talking about the actual decryption of the communications, just the glow.

    7. Re:Considerable by Anne+Thwacks · · Score: 2, Insightful
      If you want privacy what the hell are you doing using equipment that broadcasts

      Oh, yeah, PT Barnum described the phenomenon accurately.... there's one born ...

      --
      Sent from my ASR33 using ASCII
  18. Google? by gooman · · Score: 2, Insightful

    So how long until we can get an overlay for Google Earth?

    --
    "Kittens give Morbo gas!"
  19. What's the big deal? by schweini · · Score: 2, Insightful

    Could someone tell me why this is supposed to be such a break-through?
    AFAIK, every GSM network provider has a database of what network-cell their users are in at a given time, and when they make a call, so all these guys did was to map that info onto a map of a city? Doesn't sound THAT innovative.
    On a related note: does anybody know of a J2ME program that reads out where the cell-phone it's running on is located at the moment? i once heard something about a "locationAPI' or something like that, but couldn't find a demo program or more info on that.

  20. research??? by idlake · · Score: 2, Insightful

    What's the intellectual contribution of this research? Mapping data onto city maps is standard GIS usage. It's the kind of information companies use for deciding where to locate cell phone towers, where there are coverage problems, and where there are capacity problems.

    1. Re:research??? by iamlucky13 · · Score: 1

      Yeah, it really is much more of an acedemic exercise than anything.

  21. Something wrong with the map by sdpuppy · · Score: 1
    There's something wrong with the map - I tried clicking on it and I don't see any cute messages...
    ...Oh wait

    http://it.slashdot.org/article.pl?sid=05/09/15/121 2240&tid=111&tid=218

  22. error! by sdpuppy · · Score: 1
    There's something wrong with the map - I tried clicking on it and I don't see any cute messages...
    ...Oh wait

    http://it.slashdot.org/article.pl?sid=05/09/15/121 2240&tid=111&tid=218

  23. researcheRs by Anonymous Coward · · Score: 0

    I'm thinking about reading the article.

  24. Re:HAPPY BIRTHDAY ZONK! by Anonymous Coward · · Score: 0
    Well, they aren't really "editors," in the sense that editors edit things. They are more like "copy and paste monkeys," in the sense that they take submissions and copy and paste them onto the page. I guess you could call it editing if you include the random misspellings and poor grammar and punctuation they sprinkle on top.

    The important thing to remember is that these "copy and paste monkeys" are VERY highly paid. In fact, according to IRS records for tax year 2004, the LOWEST PAID EDITOR (you can probably guess who that was) took home $221,427.83. If this outrages you, just remember that every time you visit this site or post a comment, you're putting that money in their pockets while you're at your $37,800 per year job doing quality work. Toodles!

  25. +1 Sci-Fi / Nerd by eieken · · Score: 1

    That map looks like something out of Final Fantasy: The Spirits Within

    --
    Meet new people, and kill them.
  26. Can you see me now... by FlatCatInASlatVat · · Score: 3, Funny
    Uh oh!

    ------------

    Non contorque sub ubi voster. (Don't get your knickers in a twist).

  27. stating the bleedin' obvious by cliveholloway · · Score: 3, Funny

    ...indicating cell phone usage in various parts of the city. Using call origin and destination data, they are able to not only reverse-engineer a topographic map of the geography and landscape, but one of phone usage as well

    Really? Who'd have thunk it? Outstanding deduction there.

    cLive ;-)

    --
    -- Trinity in high heels carrying a whip: The donimatrix - there is no spoonerism
  28. Terrorist Bombs Triggered By Cell Phones by technoCon · · Score: 1, Interesting

    I seem to recall reading that most improvised explosive devices used by the Syrian/Saudi/Iranian terrorists deployed in Iraq use cell phone triggers. And I suspect the London bombs were triggered via cell phone, too.

    I dearly hope that cell phone usage provide a window into this kind of activity. If the "privacy concerns" of this sort of cell-phone mapping are real, then the US military could exploit this in some kind of Able Danger style data-mining operation that might save some American soldiers' and Iraqi civilians' lives.

    I am in two minds when someone cites privacy concerns. Part of me thinks, "it's bad for the government discover info that might falsely cast suspicion upon an innocent party." Another part of me thinks, "it's bad for the government to avert its eyes from information that could thwart an attempt to nuke New York City."

    1. Re:Terrorist Bombs Triggered By Cell Phones by scotbot · · Score: 4, Informative
      I suspect the London bombs were triggered via cell phone.
      Rubbish. How could they? You can't get a mobile signal on the underground because it's so far underground. The bombs were on timers - at least, they were until the police decided to change the story for reasons known only unto them.
    2. Re:Terrorist Bombs Triggered By Cell Phones by WillAffleckUW · · Score: 2, Informative

      I suspect the London bombs were triggered via cell phone.

      Rubbish. How could they? You can't get a mobile signal on the underground because it's so far underground. The bombs were on timers - at least, they were until the police decided to change the story for reasons known only unto them.


      Many underground transit tunnels - and car/truck tunnels - have repeaters nowadays to provide cell phone, emergency signal, and radio services. However, this is not true of all tunnels, only some.

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      -- Tigger warning: This post may contain tiggers! --
    3. Re:Terrorist Bombs Triggered By Cell Phones by scotbot · · Score: 1

      Perhaps, but the London Underground have already stated that mobile phones don't work on their subway, and won't work till at least 2008 (http://www.bbc.co.uk/london/travel/features/tube/ tube_mobile.shtml/).

      Also following the London underground bombings of July, a misleading spam email was circulated stating that regardless of signal, mobile phones would still be able to connect to the UK's emergency services (999) if the user dialled 112. Obviously, if there is no signal, there's no way of being able to connect to the network and therefore dial any number. On the underground, you cannot presently get a signal. So, obviously the bombers (or anyone else for that matter) never used their mobiles to trigger them.

  29. Comment removed by account_deleted · · Score: 1

    Comment removed based on user account deletion

  30. Cool by Anonymous Coward · · Score: 1, Informative

    As someone who lives in Graz, this map is very interesting.

    The large red peak is, not surprisingly, the Technical University in Town.

    The smaller peaks in the centre of the map seem to be the Hauptplatz, the schlossberg, and the new art museum - so people phoning to meet friends etc. This area is also the old town of Graz, and is thick with bars, clubs, and resturants.

    The peaks to the top left are residental areas, but there is also a Technical college in this area as well, but this area is also rife for traffic jams, so it could be people phoning home to say they'll be late.

    The area at the bottom left of the map is industrial.

    Interestingly the area at the bottom of the map, to the left of the large peak, is the red light district, but doesn't have any mobile activity. I guess it was the wrong time of day!

  31. I think you missed a word. by ladadadada · · Score: 2, Interesting

    I suspect the point of the article was that it can now be done in realtime. The journalist may not have picked up that plotting traffic patterns was old hat but I'm sure the MIT researchers knew. Realtime traffic patterns would have many more uses than daily plots of the traffic patterns particularly in responding to emergencies.

    The article uses the words "regular intervals" which doesn't really give us much idea of how often this is but "realtime" suggests that it's somewhere in the realm of every minute or several times a minute.

    I like to think that researchers at MIT working on something that journalists report as "cutting edge" probably is cutting edge, however it may not be that the aspect of it the gets all the emphasis is actually the cutting edge part.

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    Sig matters not. Judge me by my sig, do you?
    1. Re:I think you missed a word. by tsotha · · Score: 1
      I didn't mean to imply that because I could produce the same plot we can't produce a realtime dynamic plot. In fact we do on a daily basis for planning and maintennence purposes. In this case by realtime I mean within three seconds of call termination. It may be there's some subtle point the journalist missed but I'm at a loss to know what it is.

      My point about interference cancelling was it's actually pretty common for academic researchers to produce things that aren't cutting edge at all because they base their ideas of "cutting edge" mostly on what appears on academic journals. I'm sure most researchers do as much investigation as they can to avoid later embarrassment, but every few years something really blatant slips through. Sometimes it's duplication of classified projects (understandable), and sometimes they're duplicating commercial research. This is less understandable, since companies are usually pretty forthcoming with this kind of thing (more than they should be, in my opinion). I'm pretty sure if an MIT professor called up my employer and asked what we do he would get at least enough information to know whether or not he was wasting his time.

  32. Big Red Blob by Alsee · · Score: 1

    What's that big red blob on the map?

    Oh that? That's the movie theater.

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    - - You can't take something off the Internet! That's like trying to take pee out of a swimming pool.