[SR-Users] Calling a mobile SIP client, which needs to update the registration

[Kjeld Flarup]

Perhaps this presentation can be of inspiration.

You would need to branch Your call if You have more destinations.

A simpler approach which I use is to loop for some seconds after sending 
the push, and see if the registration shows up in the location table.

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On 04/09/2018 09:36 AM, Igor Olhovskiy wrote:
> Look at https://www.kamailio.org/docs/modules/5.0.x/modules/tsilo.html
>
> Regards, Igor
>
> On Apr 9, 2018, 9:44 AM +0300, Ulrich Henning <HUlrich at telba.de>, wrote:
>>
>> Hi everybody,
>>
>> I am trying to call a sip client on a mobile cellphone, which is 
>> registered fine at my Kamailio instance. Everything is working fine 
>> if the phone is awake and the mobile app is not sleeping (e.g. energy 
>> saving by OS). If the device is sleeping, the cellphone gets a wakeup 
>> request call via apple push kit and wakes the app. Currently my app 
>> is doing a Register after each wakeup, because the device does not 
>> know if the cellular network changed (external IPv4 address with 
>> Carrier Grade NAT).
>>
>> At this point an incoming call already got routed to any existing 
>> user registrations in userloc db. In this case, if the cellular 
>> provided network address changed, the sip client on the device won’t 
>> receive any invite of this last call. Instead all last known 
>> Contact-URIs are tried to be called until this sip invite times out 
>> because no response message is received back in time.
>>
>> I tried to delay the incoming invite message, but this doesn’t seem 
>> the right way to go, since I can’t know if the mobile device is 
>> actually reachable and this method would potentially delay every call.
>>
>> What is the best approach to solve this issue? I am looking forward 
>> for any comment or suggestion.
>>
>> BR,
>>
>> Henning
>>
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>
>
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