[srslte-users] UE attached but without IP

[Eduardo Garro Crevillen]

Hello again,

We have been finally able to run properly srsLTE over the bittium  
phone. After several configurations we decided to modify the epc apn  
from 'srsapn' to 'ims' and it worked. I guess that as Pedro mentioned,  
the Bittium always sent this apn_name regardless of providing other  
alternatives.

For connecting to internet we later masquerade the local network  
interface with the Wi-Fi interface by running the ./srsepc_if_masq.sh  
<IF_NAME>. Again, thanks Pedro for your help with the issue.

We now are dealing with the MBMS feature, but I will create a new  
thread for this.

Kind regards, Eduardo.

Eduardo Garro Crevillen <edgarcre at iteam.upv.es> escribió:

> Hi Pedro again,
>
> I have found one option within phone settings to enable/disable the  
> VoLTE IMS. Nevertheless, the mobile is still not able to get an IP.  
> I attach two new log and pcap files with VoLTE IMS activated and  
> deactivated. If you take a look both configurations say at some time  
> that there is and integrity failure (Integrity check failure.  
> Algorithm=EIA1), and the errors start from that moment. However, if  
> I change from EIA1 to EIA2 is still not working?
>
> Any other option to check?
>
> Pedro Alvarez <pedro.alvarez at softwareradiosystems.com> escribió:
>
>> Eduardo,
>>
>> The problem does not seem to be in the OP/OPc, AMF, etc., since the
>> phone accepts the authentication/security-mode-command.
>>
>> The problem seems to be in the APN settings. You are replying to ESM
>> information request with the APN name == "ims".
>> Can you try to see why you are sending "ims" as the APN name? Any
>> setting on the phone to disable IMS?
>>
>> You do not need to set apnuser/apnpass.
>>
>> Regards,
>> Pedro
>>
>> On Thu, Feb 7, 2019 at 12:55 PM Eduardo Garro Crevillen
>> <edgarcre at iteam.upv.es> wrote:
>>>
>>> Hello Pedro,
>>>
>>> We have checked that the same apn configuration (apn = srsapn) is in
>>> both, the epc.conf and in Bittium. We don't know if we need to
>>> configure something else, e.g. apnuser/apnpass. Since these fields are
>>> not defined in epc.conf, we have left blank in our mobile. May be the
>>> problem caused because of a bad USIM <-> user_db.csv configuration? We
>>> have been reading previous question were an AMF = 8000 was
>>> recommended, but we are using 9001. In addition, another comment was
>>> that milenage algorithm is not supported for opc in previous srsLTE
>>> releases.
>>>
>>> Kind regards, Eduardo.
>>>
>>> PS: In case it helps, we have succusfully connected with a virtual
>>> srsUE (ue.conf), but Bittium is not able to connect.
>>>
>>> Pedro Alvarez <pedro.alvarez at softwareradiosystems.com> escribió:
>>>
>>>> Can you double check if the APN configuration matches in the EPC  
>>>> and the UE?
>>>>
>>>> On Thu, Feb 7, 2019 at 10:59 AM Eduardo Garro Crevillen
>>>> <edgarcre at iteam.upv.es> wrote:
>>>>>
>>>>>
>>>>> Hello everyone,
>>>>>
>>>>> We have just started trying to implement the srsLTE suite. We are
>>>>> using the srsepc, the srsenb which is connected to a USRP B210 and
>>>>> a sysmocom USIM inside a Bittium phone as UE. However, although it
>>>>> seems that the UE is correctly attached, it does not get any IP
>>>>> address. In the attachment you can find the .log and .pcap files.
>>>>> Taking a look to the epc.log it seems that there is an error in the
>>>>> NAS authentication protocol. We have thought that there was a
>>>>> problem with the USIM data. However, we have checked several times
>>>>> that the IMSI, OPC and K are correctly included within the
>>>>> ue_db.csv. This the included line:
>>>>>
>>>>> ue4,901700000000004,99728e5d250001ba5f322c82d002db86,opc,b8993ca66ce802c03a2c16d237e90cd1,9001,0000000012fa,7
>>>>>
>>>>> Maybe there is an error regarding the SQN or the QCI? Since we have
>>>>> not found any message on the mailing list archives talking about
>>>>> these problem, we kindly ask for your help.
>>>>>
>>>>> Kind regards, Eduardo
>>>>>
>>>>> -----------------------------------------
>>>>>  Eduardo Garro Crevillén, R&D Engineer
>>>>>  Universitat Politècnica de València
>>>>>  iTEAM Research Institute
>>>>>  Mobile Communications Group
>>>>> -----------------------------------------
>>>>> _______________________________________________
>>>>> srslte-users mailing list
>>>>> srslte-users at lists.softwareradiosystems.com
>>>>> http://www.softwareradiosystems.com/mailman/listinfo/srslte-users
>>>
>>>
>>>
>>> -----------------------------------------
>>>  Eduardo Garro Crevillén, R&D Engineer
>>>  Universitat Politècnica de València
>>>  iTEAM Research Institute
>>>  Mobile Communications Group
>>> -----------------------------------------
>
>
> -----------------------------------------
>   Eduardo Garro Crevillén, R&D Engineer
>   Universitat Politècnica de València
>   iTEAM Research Institute
>   Mobile Communications Group
> -----------------------------------------



-----------------------------------------
   Eduardo Garro Crevillén, R&D Engineer
   Universitat Politècnica de València
   iTEAM Research Institute
   Mobile Communications Group
-----------------------------------------