[WG-IMS] Technical Requirements - RFC

[Bogdan-Andrei Iancu]

Hi all,

As the scoping process was successfully completed last week (see the 
conclusions here 
<https://github.com/OpenSIPS/opensips/wiki/IMS-Working-Group-Scope>), 
the next milestone is to explore the technical details and implications 
of each IMS component to be addressed.
Here we are heavily relying on the input (as expertise) from people 
already involved in the IMS world, so please contribute as much as 
possible :).

A first list of technical requirements is already compiled here 
<https://github.com/OpenSIPS/opensips/wiki/IMS-Working-Group-Requirements> 
- I tried to group the requirements around the components we have scoped 
as to be addressed.

Now, what we need to do here:

* verify and complete the list of requirements, to be sure nothing is 
missing in order to properly implement the IMS support.

* comments or details about the items on the list are welcome - as many 
details/info as better

* a "weak" item on the list is the Presence server - even if the SIP 
flows are clear, what is not yet 100% clear (at least for me) is what 
"event"'s are needed here - for sure the "presence" and as far as I 
heard the "reg" (RFC3680). But anyone can throw more light here ?


Thanks and regards,

-- 
Bogdan-Andrei Iancu

OpenSIPS Founder and Developer
   https://www.opensips-solutions.com
   https://www.siphub.com
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