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Romeu Medeiros medeiros at medeiros.eng.brI found this in the 3GPP documentations [1]: [image: image.png] I will change the code to send only the CSFallback indicator in this case to see if can solve the problem. Thanks Romeu Medeiros 1. https://www.etsi.org/deliver/etsi_ts/136400_136499/136413/09.10.00_60/ts_136413v091000p.pdf On Sat, Jul 13, 2019 at 6:35 PM Romeu Medeiros <medeiros at medeiros.eng.br> wrote: > Hello Sukchan and friends. > > I'm trying to use the CSFB in test lab, and every time that nextepc send > the UEContextModificationRequest, the UE respond with an > UEContextModificationFaliure [ Protocol-cause=semantic-error ]. > > [image: image.png] > > I'm looking why I'm getting this. Someone have any idea? > > Thanks > > Romeu Medeiros > > On Thu, Jul 11, 2019 at 12:15 PM Sukchan Lee <acetcom at gmail.com> wrote: > >> Dear Osmocom & NextEPC Community, >> >> Today I've added CS Fallback and released NextEPC v0.5.0 >> >> 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 >> >> BTW, I don't know if there is anyone who wants to integrate this big >> thing. >> Even though I'm not sure if this will help, but let me introduce the >> configuration of the NextEPC. >> >> To use SGsAP, change the mme.conf as follows: >> >> # >> # <sgsap> >> # >> # o Single MSC/VLR >> # sgsap: >> # addr: 127.0.0.2 >> # plmn_id: >> # mcc: 001 >> # mnc: 01 >> # tac: 4130 >> # lac: 43690 >> # >> # o Multiple MSC/VLR >> # sgsap: >> # - addr: 127.0.0.2 >> # plmn_id: >> # mcc: 001 >> # mnc: 01 >> # tac: 4131 >> # lac: 43692 >> # - addr >> # - 127.0.0.3 >> # - fe80::2%lo0 >> # plmn_id: >> # mcc: 001 >> # mnc: 01 >> # tac: 4132 >> # lac: 43692 >> # - name: msc.open5gs.org >> # plmn_id: >> # mcc: 001 >> # mnc: 01 >> # tac: 4133 >> # lac: 43693 >> # >> >> FYI, I also attach the pcap that I run with nextepc simulator as below. >> >> $ ./tests/testcsfb >> mo-idle-test : SUCCESS >> mt-idle-test : SUCCESS >> mo-active-test : SUCCESS >> mt-active-test : SUCCESS >> All tests passed. >> >> Feel free to raise any questions about this things. >> >> Best Regards, >> Sukchan >> >> -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/nextepc/attachments/20190713/3ee33da1/attachment.htm> -------------- next part -------------- A non-text attachment was scrubbed... Name: image.png Type: image/png Size: 217008 bytes Desc: not available URL: <http://lists.osmocom.org/pipermail/nextepc/attachments/20190713/3ee33da1/attachment.png> -------------- next part -------------- A non-text attachment was scrubbed... Name: image.png Type: image/png Size: 60539 bytes Desc: not available URL: <http://lists.osmocom.org/pipermail/nextepc/attachments/20190713/3ee33da1/attachment-0001.png>