Thank you Ben, Sigmar, the presentation today was very informative! Here are some notes I took on the impact to ONAP. Hopefully
* Both RAN and Core NFs are “tracking area aware”. And a slice must be “consistently configured” throughout a tracking area. It inadvisable (or impossible?) to configure a slice on just a subset of a tracking area. Thus, the lowest level of granularity of “scope” that a slice can be mapped to is a tracking area. * So it sounds like we need to model an object type in A&AI that represents a "Tracking Area", and need to allow (an easy) way for a service provider to maintain the association between a (RAN or Core) NF and the Tracking Areas that it supports. * Thus, when a (RAN or Core) NF is instantiated the service provider must enter the “list of” tracking areas that the NF is intended to supports. * When ONAP receives a request to create a slice instance, the request must include a list of Tracking Areas in which that slice should be configured. ONAP would use A&AI to map that request into a list of RAN and Core NFs that need to be configured. Perhaps to make it less cumbersome on the GUI user, ONAP should also allow the service provider to define an arbitrarily deep hierarchy of container objects in A&AI to that would at the “bottom” resolve to a list of tracking areas. * So, it sounds like ONAP has no need to track the association of tracking area to cell, and in fact ONAP has no need to even be aware of cells at all. This implies that ONAP need not track the association between a cell and the frequencies it supports. * We confirmed that, as the wiki Slicing use case states, it is possible for an ONAP service designer to define a “slice type” that maps to a certain (set of) frequenc(ies), like the “Red” and “Blue” frequencies example. However, because ONAP doesn’t track cells, much less the frequencies of the cells, there is no way for ONAP to validate that the set of tracking areas included in a “slice instantiation request” is actually consistent with the frequency map for that slice type. E.g., ONAP would not know if a user tries to instantiate a slice type that is restricted to “Red frequencies” in a tracking area that has no cells that use the “Red frequencies”. We decided this is okay, presumably because whoever is providing the list of tracking areas to ONAP has “non-ONAP” ways of verifying the consistency between the frequency definition of a slice type and the characteristics of the tracking area in which they want that slice instantiated. * As mentioned above, it is inadvisable (or impossible?) to configure a slice on just a portion of a tracking area. Thus, when configuring a slice in a tracking area it is important that ONAP apply/activate the configuration of that new slice on all CUs (for example) in that tracking area at exactly the same time. We didn’t discuss the adverse effects of race conditions in this regard. * We need a way to allow a service provider to redefine the mapping between a (RAN or Core) NF to the tracking areas that it supports. Such redefinition could trigger ONAP “mass update” activity. E.g., if a tracking area is added/removed from a CU then ONAP will need to determine if that action resulted in a change in the set of slice instances that the CU should support, and if so reconfigure the CU accordingly to add/remove the appropriate slices. -----Original Appointment----- From: ONAP Meetings and Events [mailto:linuxfoundation.org_1rmtb5tpr3uc8f76fmflplo...@group.calendar.google.com] Sent: Wednesday, January 03, 2018 7:44 PM To: ONAP Meetings and Events; [email protected]; BEGWANI, VIMAL Subject: [onap-discuss] Invitation: 5G Use Case Team Meeting @ Weekly from 8am to 9am on Thursday from Thu Jan 4 to Thu Dec 13 (PST) ([email protected]) When: Thursday, January 25, 2018 11:00 AM-12:00 PM America/New_York. 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