[srslte-users] srsenb disconnection problem

[Ismael Gomez]

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 at 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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