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Dario Lombardo dario.lombardo at libero.itOn Fri, Feb 17, 2012 at 12:15 PM, Luca Bongiorni < luca.bongiorni1 at studenti.unimi.it> wrote: > Hi Dario, > > which is the environment that you are using for the tests? (eg. OpenBSC or > a PLMN: in this case which one? 01, 10, 88) > PLMN > > Are you trying to just sniff the air or also stimulating the traffic with > your own ME? > stimulating > > Good results depends from many factors: > - If the "session" is hopping through chans or not; > - If the ME supports only GPRS or not; > - If you are making tests on your own lab's environment or a PLMN; > - an other related with the osmocombb's ME and the cable used. > > In case you don't use OpenBSC with nanobts or BS-11, i would suggest use > to use an old ME that supports only GPRS and not EDGE, thus u will avoid it > to use EDGE's coding-schemes (eg. i obtained good results with an old gprs > usb modem on PLMNs). Then i would suggest you to find an ARFCN of a PLMN > that doesn't hop: i found some good ones by checking with a Blackberry's > Field Test [1]. > > My stimulating ME supports edge, so my fake traffic is not good for tracking. I must find the right phone... do you have some model to suggest? I can find very old phones or very new, but it's hard to find some "medium" that support GPRS and not EDGE :). > [1] http://i41.tinypic.com/20huagj.jpg > > That sounds very interesting, since I have a BB. How can you check that your arfcn is not hopping from this menu? -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/baseband-devel/attachments/20120217/c15d288b/attachment.htm>