Thanks Ralph, But when i'm opening a bts station i have to register SIM numbers that could later on connect to my network, is there a way around that? i couldnt find any..
Meny 2016-03-15 16:26 GMT+02:00 Ralph A. Schmid, dk5ras <[email protected]>: > The phones will register to your base station, when there is no > infrastructure any more - this is a common scenario in a real disaster, the > cell phone infrastructure will collapse quite soon. In this situation all > surviving phones will search for a new signal, find your BTS and register. > Then you can find out the TA values and try locating then. > > > > In fact exactly this is done when people get lost out in the woods, or in > the mountains - putting a GSM cell on board a helicopter... > > > Ralph. > > > > *From:* [email protected] [mailto: > [email protected]] *On Behalf Of *Meny > Sidar > *Sent:* Tuesday, March 15, 2016 3:18 PM > *To:* Nikos Balkanas > *Cc:* [email protected]; Marcus Müller > *Subject:* Re: [Discuss-gnuradio] Picking up RF cellular signals > > > > Thank you for your comments. > > Marcus, sorry for bugging you with this issue. > > I am well aware of the previous discussions with you, and have learned > from them as well as from other people. > > however, when i come across something like this for example: > > https://www.youtube.com/watch?v=ZUqzdrB1o2U > > i keep thinking that there is some kind of heat signature in the spectrum > that the cellular produces (please correct me if im wrong) > > how else can you explain this works? > > > > I know my approch is not ideal, and i'm not ruling out opening a bts base > station, > > but i cant find a way to make phones register to my station automatically.. > > > > thanks again for your comments guys, > > really appreciate it. > > > > Meny > > > > 2016-03-15 4:11 GMT+02:00 Nikos Balkanas <[email protected]>: > > Indeed, there is phone locator protocol, and a service offered as by some > companies. They work through provider contracts. The problem is that you > have to know the phone number beforehand and the carrier. Not very useful > in a disaster case :( > > > > BR, > > Nikos > > > > On Mon, Mar 14, 2016 at 5:50 PM, Marcus Müller <[email protected]> > wrote: > > True, at least unless you send them something they have to react to. > Which the phone will only do if you're the infrastructure, and usually > implies you authenticate as such[2]. Which will hence most likely only work > if the cellular providers cooperate with you. > > > [...snip...] > > > > On 03/14/2016 03:54 PM, Meny Sidar wrote: > > Hi guys, > > > > I am currently working on a project for my university, where i'm trying to > locate cellular phones using SDR (USRP B210). > > The idea of the project is to be able to find survivors/victims in > disaster areas, such as earthquakes, by assuming they have their cellular > on them. > > > > What i did so far, is a program that calculates and outputs in a loop the > power transmitted from a cellular phone from it's uplink channel. that can > tell me my distance to it. > > problem is, that cellular phones are usually in idle mode and not > transmitting at all. > > So it works, but only if the phone is currently transmitting to the > network (phone call, internet, etc..) > > > > I'm trying to find a solution for this, > > There has to be a way of knowing that some kind of RF transmitter/receiver > is near me... > > If anyone can shed some light on this subject, what can i do or if i need > to go in another way, i'll be very grateful! > > right now i'm stuck. > > > > Thanks a lot, > > Meny > > > > _______________________________________________ > > Discuss-gnuradio mailing list > > [email protected] > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > >
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