[Smwg] SPDF - question on usage of primeServiceReqIDXRef

[Marcin.Gnat at dlr.de]

Hi,

Could it be, this parameter should point to the first request as kind of the "universal ID reference which all related scenarios point to"? This is btw. not a typo that the Request is referenced and not the Service Package, I think. But also I do not know if this is still good. I'm not sure if it than fits still to our "scenarios" scenario which we have.

Also I saw in the newest SMURF, that there is a notion of defining Scenarios with scenarioID and serviceReqID. This would mean, two different scenarios are defined by two different requests. My thinking was (and I reflected that also in the state machine) that the different scenarios are rather on the level of Service Package and not the Service Package Request. The latter case makes the handling of scenarios extremely complex in my opinion. I mean, there is a difference:

-          I have a pass which has alternatively another pass which can be exchanged with

-          I have a time period with multiple passes (i.e. shopping list or standing order), which may be in another scenario replaced by request with different pattern...

Especially the latter case is not really different (from user point of view) with simple Replace "Service Package Request" Request. If we treat two different Requests as scenarios, the provider needs to keep all the possible pass combinations in parallel. Also the state machine gets very complex....

Marcin

From: SMWG [mailto:smwg-bounces at mailman.ccsds.org] On Behalf Of Eddy, Wesley M. (GRC-LCN0)[MTI SYSTEMS, INC.]
Sent: Montag, 1. Oktober 2018 19:14
To: CCSDS Service Mgmt WG
Subject: [Smwg] SPDF - question on usage of primeServiceReqIDXRef

There is a field in the Service Package Data Format that I don't really understand.  At the very least, it appears to be incorrectly described, and it seems possible to me that it might not be needed.

In the "ScenarioDetails" that may be present as part of each ServicePkgResultDetails, there are two fields, a "scenarioID" that seems necessary and useful, and a "primeServiceReqIDXRef" that I don't understand:

primeServiceReqIDXRef

Mandatory parameter.
This parameter is used to specify the scenario ID of the Service Package containing the services that will be configured to support the space link carrier(s)


Two matters of confusion I have are:

1)      The field name indicates it's a service request ID, but the description says scenario ID.  Probably this is a typo or copy/paste error?

2)      The service request ID is already available elsewhere (via serviceReqXref) in the overall ServicePackageResults that contains all of the ServicePkgResultDetails.  What is the difference between that and this request ID?  If it's not adding information, I don't think we should include it.

Does anyone have thoughts on this?

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