l in modelling the environment and the concomitant computational workload to work out the implications of thost details. however, even if the maps are just propagation predictions, the marketing value of putting them up is obviously profound, judging from the reaction on just this mailing list. some marking guy should get a juicy bonus for thinking of this. cheers, -mo ps - cynical about phone companies??? me??? what *ever* made you think that?? Steven Dubnoff wrote: > These street-level maps are amazingly detailed, see: > > http://compass.t-mobile.com/default.aspx > > If the other carriers would do this, one could make very informed decisions. > > Best, > > Steve > > > > > Steve Dubnoff > 1966 Willard Pilothouse > www.mvnereid.com > sdubnoff@circlesys.com > _______________________________________________ > http://lists.samurai.com/mailman/listinfo/trawlers-and-trawlering > > To unsubscribe send email to > trawlers-and-trawlering-request@lists.samurai.com with the word > UNSUBSCRIBE and nothing else in the subject or body of the message. > > Trawlers & Trawlering and T&T are trademarks of Water World > Productions. Unauthorized use is prohibited.

n around http://mail.yahoo.com

ort messages to it. Best regards, Marcus On 12/28/2015 04:38 PM, Meny Sidar via USRP-users wrote: > Hello guys > > I'm wondering if there is a way you can think of, to use the USRP to > send some kind of signal that can get cellular phones nearby to > increase their TX power. > > I'll explain- > When a cellular phone is connected to the network, and untouched by > the user or with no activity with the network (such as calls/sms/etc) > it is in "rest" mode - it's tx power is very low and can be seen in a > spectrum analyzer as a flat line. > For my project, i need to use cellular TX power in order to know when > i'm coming closer/further to the phone, and for now it's working only > if i make a call for example, or even download something off the internet. > > My question is if there is a way i can make a phone come out of it's > rest when i'm not a part of the cellular network? > > Thanks a lot, > Meny > > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com

that > looks like it was coming from the base station and at least would make the > cell phone respond, but that would take a little more serious intelligence > on a TX side. > > It'll be much easier to just make a call with the phone, or constantly > sending control message/short messages to it. > > Best regards, > Marcus > > > On 12/28/2015 04:38 PM, Meny Sidar via USRP-users wrote: > > Hello guys > > I'm wondering if there is a way you can think of, to use the USRP to send > some kind of signal that can get cellular phones nearby to increase their > TX power. > > I'll explain- > When a cellular phone is connected to the network, and untouched by the > user or with no activity with the network (such as calls/sms/etc) it is in > "rest" mode - it's tx power is very low and can be seen in a spectrum > analyzer as a flat line. > For my project, i need to use cellular TX power in order to know when i'm > coming closer/further to the phone, and for now it's working only if i make > a call for example, or even download something off the internet. > > My question is if there is a way i can make a phone come out of it's rest > when i'm not a part of the cellular network? > > Thanks a lot, > Meny > > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > > > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > > >

g heavily lifting. > > I've been incredibly dissappointed in the results. Well over half of them > have needed replacement and not a one runs reliably. They need rebooting at > intervals from hours to a few tens of days to recover from total lock up. > The problem is not environmental, power or SD cards. Do you know what the problem is? I know that the RPI has pretty cheap design (like most of these super-cheap SoC boards) and does suffer from a few problems. The most common one is under-designed power supply. Together with the ultra-cheap wall-wart supplies mostly used results in a quite decreased MTBF due to spikes/drops on the power rails (BTW: soekris suffers from that too, just that a better wall-wart supply doesn't help). Depending on the environment, in which those boards are run, overheating might also be a problem. Other than that, i am not aware of any software or hardware issues that would cause the RPI, or any other board, to run unreliably. Attila Kinali -- < _av500_> phd is easy < _av500_> getting dsl is hard

sers, and similar tasks. In short, nothing requiring heavily lifting. >> >> I've been incredibly dissappointed in the results. Well over half of them >> have needed replacement and not a one runs reliably. They need rebooting at >> intervals from hours to a few tens of days to recover from total lock up. >> The problem is not environmental, power or SD cards. > Do you know what the problem is? > > I know that the RPI has pretty cheap design (like most of these super-cheap > SoC boards) and does suffer from a few problems. The most common one > is under-designed power supply. Together with the ultra-cheap wall-wart > supplies mostly used results in a quite decreased MTBF due to spikes/drops > on the power rails (BTW: soekris suffers from that too, just that a better > wall-wart supply doesn't help). Depending on the environment, in which > those boards are run, overheating might also be a problem. > > Other than that, i am not aware of any software or hardware issues that > would cause the RPI, or any other board, to run unreliably. > > Attila Kinali Many of the chips in the original PI run rather hot and need heatsinking if used in other than free-air ambient temperatures. I've given up on them for anything that I can't easily reset. -- mailto:oz@ozindfw.net Oz POB 93167 Southlake, TX 76092 (Near DFW Airport)