On 15 September 2010 22:51, Milinko Isakovic <[email protected]> wrote: > IMSI is sent on non -encrypted protocol, so I would like to set up frequency > on UPLINK ? > I would like to get all IMSI numbers attached to one base station, or at one > channel, if that is possible ?
Let's say.... it is difficult if you don't control the base station. Keep in mind, that a subscribers IMSI is not send frequently. It is replaced by TMSI as soon as the IMSI is transferred once. The IMSI only gets transferred if a mobile switches "location". I think it depends on the network topology how and when the IMSI is transferred. Take a look at page 24 of this document: [1]. It is the solution to this exercise: "Suppose that the home system of a mobile user is in Köln. The user moves to New York (a new system) and then to Amsterdam (another new system). Describe on a graph and explain the procedure of registration and deregistration from the databases (VLR, HLR) indicating in each step the entities involved." As soon as the TMSI is in use there will be no transfer of the IMSI again, unless the UE changes location. In order to get all attached IMSIs you would have to trigger this procedure and therefore you need control of the base station. Regards, Markus [1] http://www.unixforces.net/~markus/university/mobile_radio_networks/mobile_radio_networks_1_exercise_ss2009.pdf _______________________________________________ A51 mailing list [email protected] http://lists.lists.reflextor.com/cgi-bin/mailman/listinfo/a51
