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이석찬 acetcom at gmail.comHi Harald, There is no pcap file. Could you attach it? Thanks! Best Regards, Sukchan 2019. 7. 12. 오전 1:47, Harald Welte <laforge at gnumonks.org> 작성: > Hi Sukchan, > >> On Fri, Jul 12, 2019 at 12:14:51AM +0900, Sukchan Lee wrote: >> Today I've added CS Fallback and released NextEPC v0.5.0 > > Thanks a lot! > >> So, I'd just like to test this part with Osmocom project, but it seems to >> be a difficult task. The reason is why I have little knowledge about 2G/3G. >> Nevertheless, I will try to do it > > I advise you to not spend too much time on it until we can provide you > with a set of configuration and instructions on how to configure this, > instead of spending a lot of time in trial and error. I think we can > save you some time there. > > A good starting point would be to use the nightly builds for Ubuntu or Debian, > (see https://osmocom.org/projects/cellular-infrastructure/wiki/Nightly_Builds) > and try to follow the general instructions of https://osmocom.org/projects/cellular-infrastructure/wiki/Osmocom_Network_In_The_Box. The goal would be to create a network with two phones/IMSIs > where you can have a 2G-to-2G voice call first. Only once that works, the > LTE neighbor cell information and SGs configuration can be added. > > You will need the following parts for a minimal 2G setup: > > * osmo-trx + osmo-bts-trx (if using SDR like B2x0) > * osmo-bsc (RR) > * osmo-msc (MM + CC) > * osmo-hlr > * osmo-stp (for SS7/SIGTRAN between BSC and MSC) > * osmo-mgw (for RTP audio streams; one instance can be shared between BSC and MSC) > > All of the above can run on a single machine > >> BTW, I don't know if there is anyone who wants to integrate this big thing. > > For sure we want to, and we also know there are users out there who want to. > >> Even though I'm not sure if this will help, but let me introduce the >> configuration of the NextEPC. > > Thanks, this is useful. We'll try to to set this up accordingly, but it may > take some time. > > Philipp (Cc) has been developing most of the SGs interface on the Osmocom > side, he can help you (here on this list and by direct e-mail) with any related > issues. > >> FYI, I also attach the pcap that I run with nextepc simulator as below. > > Thanks, I'd like to ask Philipp to review this and report if it reflects his > expectations about the SGs interface procedures. > > btw/unrelated: I've been hacking a lot on TTCN-3 tests for the MME, and > I've managed to get the way into NAS (EMM/ESM) and am getting all the > way up to a Attach Reject (see attached pcap). As I'm only simulating > S1AP and SGsAP so far (and not diameter), it's expected that the attach > will be rejected. I guess I'll start with using nextepc-hss first, and > add diameter support to the tests only in a later step. > > Regards, > Harald > > -- > - Harald Welte <laforge at gnumonks.org> http://laforge.gnumonks.org/ > ============================================================================ > "Privacy in residential applications is a desirable marketing option." > (ETSI EN 300 175-7 Ch. A6)