[srslte-users] iPhone XR reconfiguration error with srsLTE 18.09

[David Rupprecht]

Hi Andre,

thanks for the hint. I will test it after a conference journey. Yes,
iPhone XR has the Intel baseband. I have tested the iPhone with 18.12,
but it was not able to detect the cell, even with manual cell search and
shielding box. However, the iPhone connects on the radio layer to the
18.09 cell. Do you have any clue why this could be the case?

Thanks,
David

On 20.02.19 14:51, Andre Puschmann wrote:
> Hi David,
> 
> besides of what Pedro said, you can also try 18.12 and apply [1] to it.
> It would be good to know if the IPhone finds the network then and attaches.
> 
> This iPhone XR has the Intel baseband, right?
> 
> Thanks
> Andre
> 
> 
> 
> [1]
> https://github.com/srsLTE/srsLTE/pull/308/commits/d4efd448b8c7d8ff2234dca2ec80c9796534f76e
> 
> On 15/2/19 15:07, Pedro Alvarez wrote:
>> Hi David,
>>
>> I think this might be related to a bug in the EPC that got fixed in
>> the 18.12 version.
>> Can you either try the 18.12 version of the EPC or try to apply the
>> following patch?
>>
>> """
>> diff --git a/lib/src/asn1/liblte_mme.cc b/lib/src/asn1/liblte_mme.cc
>> index 5cb00e5..59a86d9 100644
>> --- a/lib/src/asn1/liblte_mme.cc
>> +++ b/lib/src/asn1/liblte_mme.cc
>> @@ -320,7 +320,7 @@ LIBLTE_ERROR_ENUM
>> liblte_mme_pack_mobile_id_ie(LIBLTE_MME_MOBILE_ID_STRUCT  *mob
>>              odd = false;
>>          }else if(LIBLTE_MME_MOBILE_ID_TYPE_TMSI == mobile_id->type_of_id){
>>              id32 = mobile_id->tmsi;
>> -            length = 4;
>> +            length = 5;
>>              odd = false;
>>          }
>>          }else{
>> """
>>
>> Regards,
>> Pedro
>>
>> On Fri, Feb 15, 2019 at 10:13 AM David Rupprecht <david.rupprecht at rub.de> wrote:
>>>
>>> Dear all,
>>>
>>> I'm currently testing an iPhone XR with srsenb. I'm using version 18.09,
>>> because the iPhone XR does not find the cell with 18.12. It works well
>>> as it finds the cell, performs the authentication. However, the UE
>>> disconnects after the RRC Configuration Reconfiguration, performs a new
>>> RAP / RAR and tries to Reestablish the RRC connection with a
>>> RRCConnectionReestablishmentRequest, which includes the Reestablishment
>>> Cause is set to reconfigurationFailure. It looks like the
>>> reconfiguration fails. However, I use the default config, which works
>>> well with other phones. Do you have any hint were I can start testing?
>>>
>>> I have attached the pcaps and logs and the enb configs.
>>>
>>> Thank you very much and best regards,
>>> David
>>>
>>> --
>>> M.Sc. David Rupprecht
>>>
>>> Ruhr-University Bochum
>>> Research Group Information Security
>>> Universitätsstraße 150
>>> ID 2/130
>>> 44780 Bochum / Germany
>>>
>>> Phone: +49 234 / 32 - 23508
>>> Web: www.infsec.rub.de
>>> _______________________________________________
>>> srslte-users mailing list
>>> srslte-users at lists.softwareradiosystems.com
>>> http://www.softwareradiosystems.com/mailman/listinfo/srslte-users
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>>
> 

-- 
M.Sc. David Rupprecht

Ruhr-University Bochum
Research Group Information Security
Universitätsstraße 150
ID 2/130
44780 Bochum / Germany

Phone: +49 234 / 32 - 23508
Web: www.infsec.rub.de