I 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_136...
On Sat, Jul 13, 2019 at 6:35 PM Romeu Medeiros medeiros@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@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
