Team,
I posted to the VoLTE Use Case wiki (Drafts for discussion sub-page) an updated 
version of the PPT file that I quickly covered in today's call.  It contains a 
proposal on how to support this near term need that we face together.

Here is the link:
https://wiki.onap.org/display/DW/VoLTE+Drafts+for+discussion

I intend that this proposal has an advantage of minimizing rework and 
misalignment of Release 1 and Release 2.  Note the SO functionality in this 
proposal aligns with that which is being proposed in the vCPE Residential 
Broadband Use Case.

You will note that in this PPT I have also proposed a "design time" approach 
that results in a "flat" VoLTE model in the Release 2 timeframe through 
"compile time nesting".  Please do not conclude from this that I do not 
appreciate the business benefit of modeling in ONAP complex, multi-tiered 
services.  I do appreciate that need, and I agree that ONAP needs to be able to 
support such complex, "n-tiered" services.  In fact, I am proposing in this 
deck one way to accomplish such support, at least in the near term, by 
"flattening" the orchestration of such services.

Please also do not conclude from this "flattening" proposal that I am pushing 
back on the concept of "upper level" run-time service orchestration flows 
recursively delegating to "lower level" service orchestration flows, in an 
"n-tier" construct.   In fact, I find an attractive elegance to recursive flows 
like this.  However, I am proposing to avoid such an "n-tier" flow approach in 
the near term because I do envision that such an implementation would add 
significant complexity to ONAP orchestration "rainy day handling", certainly in 
trouble-shooting.  In addition, though I would like to see ONAP eventually 
support "rainy day handling" for such an "n-tier" orchestration architecture, I 
would prefer to first develop some underlying common "rainy day handling" 
infrastructure that each flow level can leverage.  I foresee that such a task 
will take some significant design work.  Because of that I propose the "compile 
time nesting" as a way to "flatten" the orchestration and to simplify this 
rainy day handling, at least in the near term "Release 2" timeframe.

I look forward to other's comments and feedback.
Gil Bullard
AT&T

-----Original Appointment-----
From: denghui (L) [mailto:denghu...@huawei.com]
Sent: Tuesday, August 01, 2017 11:44 AM
To: denghui (L); onap-disc...@lists.onap.org; onap-tsc
Subject: [onap-discuss] ONAP VoLTE SDC call
When: Wednesday, August 02, 2017 10:00 PM-11:00 PM (UTC+08:00) Beijing, 
Chongqing, Hong Kong, Urumqi.
Where: https://zoom.us/j/137904496


Hello all

This is for discussion ONAP VoLTE SDC call.

ONAP Meeting 5 is inviting you to a scheduled Zoom meeting.
Join from PC, Mac, Linux, iOS or Android: 
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Thanks a lot

DENG Hui
  << File: ATT00001.txt >>

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