[srslte-users] srsEPC: UE unable to register on network

[Ignas Jarusevicius]

Hello Pedro,

did you find time to look further into this issue? It seems that now
Sony phone does not like something in "RRCConnectionReconfiguration,
Attach accept, Activate default EPS bearer context request".

Regards,
Ignas


On 2018.06.14 16:29, Ignas Jarusevicius wrote:
> Hi Pedro,
>
> The patch seems to help somewhat but Sony phone is still unable to
> register on the network. Looking at the logs it now goes further, but
> gives up after displaying:
>
>> Unhandled NAS integrity protected message 0x60
> Logs are attached.
>
>
> Regards,
> Ignas
>
>
> On 2018.06.14 14:43, Pedro Alvarez wrote:
>> Hum... I haven't seen this issue before...
>> The fact that it's working with the Galaxy (and the phones I test
>> with) is making me think that it may not be an issue with the COUNT
>> but some other field in the protocol that is incorrect.
>>
>> The only obvious mistake I found so far is that the protocol
>> discriminator on the ESM Information transfer seems wrong.
>> Could you try the following:
>>
>> """
>> diff --git a/lib/src/asn1/liblte_mme.cc b/lib/src/asn1/liblte_mme.cc
>> index 6d9dedc..523f921 100644
>> --- a/lib/src/asn1/liblte_mme.cc
>> +++ b/lib/src/asn1/liblte_mme.cc
>> @@ -9943,7 +9943,7 @@ LIBLTE_ERROR_ENUM
>> srslte_mme_pack_esm_information_request_msg(LIBLTE_MME_ESM_INF
>>         if(LIBLTE_MME_SECURITY_HDR_TYPE_PLAIN_NAS != sec_hdr_type)
>>         {
>>             // Protocol Discriminator and Security Header Type
>> -           *msg_ptr = (sec_hdr_type << 4) |
>> (LIBLTE_MME_PD_EPS_SESSION_MANAGEMENT);
>> +         *msg_ptr = (sec_hdr_type << 4) |
>> (LIBLTE_MME_PD_EPS_MOBILITY_MANAGEMENT);
>>             msg_ptr++;
>>
>>             // MAC will be filled in later
>> """
>>
>> Let me know if that worked for you.
>>
>> Cheers,
>> Pedro
>>
>> On Wed, Jun 13, 2018 at 2:29 PM, Ignas Jarusevicius
>> <i.jarusevicius at limemicro.com> wrote:
>>> Hello Pedro,
>>>
>>> I was using Sony Xperia F3111. I have just tried it with Samsung Galaxy
>>> S5 and it registered successfully. I had to manually run if_masq.sh to
>>> get the Internet access on the phone but I guess it is how it is
>>> supposed to work.
>>>
>>> Would it be possible to make srsepc also work with Sony phone?
>>>
>>> Regards,
>>> Ignas
>>>
>>>
>>> On 2018.06.13 15:54, Pedro Alvarez wrote:
>>>> It seems like the UE does not like message authentication code of the
>>>> ESM information transfer. This is probably related to the downlink NAS
>>>> COUNT.
>>>>
>>>> Which phone are you using?
>>>>
>>>> Regards,
>>>> Pedro
>>>>
>>>> On Wed, Jun 13, 2018 at 7:57 AM, Ignas Jarusevicius
>>>> <i.jarusevicius at limemicro.com> wrote:
>>>>> Hi Pedro,
>>>>>
>>>>> Thank you for looking into this. I attached enb.pcab together with
>>>>> enb.log and epc.log from the same run.
>>>>> The APN settings on the phone are:
>>>>>
>>>>> APN: srsapn
>>>>> Proxy: not set
>>>>> Port: not set
>>>>> Username: not set
>>>>> Password: not set
>>>>> Server: not set
>>>>> MMSC: not set
>>>>> MMS proxy: not set
>>>>> MCC: 001
>>>>> MNC: 01
>>>>> Authentication type: none
>>>>> APN type: default
>>>>> APN protocol: IPv4
>>>>> APN roaming protocol IPv4
>>>>> Bearer: 4G
>>>>> MVNO type: none
>>>>>
>>>>> I have tried changing APN in epc.conf and on the phone but result was
>>>>> the same.
>>>>>
>>>>> Regards,
>>>>> Ignas
>>>>>
>>>>>
>>>>> On 2018.06.12 21:55, Pedro Alvarez wrote:
>>>>>> Hi Ignas,
>>>>>>
>>>>>> The authentication and the security mode command seem to have worked
>>>>>> fine and it seems to be breaking on the ESM information transfer. Did
>>>>>> you set any APN on the phone?
>>>>>>
>>>>>> Can you send the enb.pcap so I can have a bit more information? You
>>>>>> can enable it on the in the enb.conf.
>>>>>>
>>>>>> Regards,
>>>>>> Pedro
>>>>>>
>>>>>> On Tue, Jun 12, 2018 at 11:49 AM, Ignas Jarusevicius
>>>>>> <i.jarusevicius at limemicro.com> wrote:
>>>>>>> Hello All,
>>>>>>>
>>>>>>> I am trying to set up srsENB and srsEPC with commercial UE. When UE
>>>>>>> attempts to connect to the network, I get "UE Authentication Accepted"
>>>>>>> message in srsEPC, but UE fails to register on the network. ENB and EPC
>>>>>>> logs are attached.
>>>>>>> UE registers successfully when srsENB is used with EPC from Amarisoft so
>>>>>>> I think the problem is with srsEPC. Am I missing something in srsEPC
>>>>>>> configuration or is it some limitation of srsEPC? Any help would be
>>>>>>> appreciated.
>>>>>>>
>>>>>>> Regards,
>>>>>>> Ignas
>>>>>>>
>>>>>>>
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>>>>>>>