[srslte-users] srsenb disconnection problem

[Nicola Bui]

I'm stuck in a meeting for a few hours more. After that I will reproduce it
and send the log.

Best,
Nicola

On Oct 27, 2017 11:28, "Ismael Gomez" <ismael.gomez at softwareradiosystems.com>
wrote:

> Hi nicola, can you send the enb.log?
>
> El vie., 27 oct. 2017 3:52, Nicola Bui <n.bui at northeastern.edu> escribió:
>
>> Thanks Ishmael, Kewin,
>>
>> that's not my issue: the problem happens while the phone is active, in
>> particular when the last is high.
>> I already tried increasing the inactivity timer and the error count in
>> the configuration file.
>> The stranger thing is, as soon as the phone is disconnected (I believe it
>> is the enb starting the disconnection) it gets a new rnti and, from the
>> phone perspectives, the network is visible and connected. However, nothing
>> works anymore like the new rnti is not linked anymore to the proper device
>> in the epc.
>> Instead, if I toggle the network from the phone, everything is resumed
>> properly.
>> I cannot send a log right now but I'll try to generate one containing the
>> issue and send it to you.
>>
>> Best,
>>
>> Nicola
>>
>> On Oct 27, 2017 04:00, "Kewin Rausch" <krausch at fbk.eu> wrote:
>>
>>> Hi everyone,
>>>
>>> I had a similar issue (dunno if it's really the same), and I partially
>>> resolved it by following Ismael answer and increasing the inactivity
>>> timeout period (now I set it at 60 seconds).
>>> Basically If i leave the UE connected to 4G but I do not generate
>>> traffic (for about the time the inactivity timeout value), it get
>>> disconnected by the eNB.
>>>
>>> This is not happening while I'm connected to a commercial base station,
>>> which means that something nasty is happening, and maybe paging is not
>>> correctly handled.
>>>
>>> I've tried the configuration with a Nexus 5, and once it get
>>> disconnected I need to reset everything by switching on and off the
>>> Airplane mode.
>>>
>>> Cheers,
>>> Kewin
>>>
>>> On Fri, Oct 27, 2017 at 8:35 AM, Ismael Gomez <ismael.gomez@
>>> softwareradiosystems.com> wrote:
>>>
>>>> Hi nicola, can you send us the enb.log? It is normal behavior to
>>>> release the connection after inactivity. You can extend the timeout in the
>>>> enb.conf file, expert section.
>>>>
>>>> However the UE should reconnect when paging is received when you ping
>>>> it for instance. If you send me the log I can check it.
>>>>
>>>> Regards
>>>>
>>>> El jue., 26 oct. 2017 17:27, Nicola Bui <n.bui at northeastern.edu>
>>>> escribió:
>>>>
>>>>> Dear all,
>>>>>
>>>>> I am running srsenb using oai as EPC. My mobile phone (moto g5+)
>>>>> connects to the network and for a while behave normally (ping is ok,
>>>>> surfing is ok, speedtest is fine). However, after some time everything
>>>>> stops working even though the phone still has an IP address the enb says
>>>>> the UE is attached (c-RNTI assigned properly).
>>>>> Actually, in the enb log I can see the c-RNTI got released and a new
>>>>> one got assigned to the UE, but the new connection is not working anymore.
>>>>> The only way for recovering the connectivity is from the mobile toggling on
>>>>> and off the airplane mode.
>>>>> The only error message I can see is: Unhandled feature in RRC
>>>>> function: liblte_rrc_unpck_rrc_connection_setup_complete
>>>>> However this appears even when the connection has been properly setup.
>>>>>
>>>>> It will be great if I can get a more stable connection or if the
>>>>> connection can be automatically reestablished.
>>>>> Any suggestion on how to debug this?
>>>>>
>>>>> Thanks,
>>>>> Nicola Bui
>>>>> Senior Research Scientist
>>>>> College of Computer and Information Science
>>>>> 655E Interdisciplinary Science and Engineering Complex
>>>>> Boston, MA 02115
>>>>> _______________________________________________
>>>>> srslte-users mailing list
>>>>> srslte-users at lists.softwareradiosystems.com
>>>>> http://www.softwareradiosystems.com/mailman/listinfo/srslte-users
>>>>>
>>>>
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>>>>
>>>>
>>>
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