[CESG] RE: Projects for CFDP Blue Book / was: Draft CFDP Pink Sheet supporting an optional 'finished' PDU in class-1

[Shames, Peter M (313B)]

Hi Gippo,

Since you asked for feedback, I think that this is Keith's area of work and his resources to manage.  If he believes that the Pink Sheets can be quickly done (which I believe it correct) and that the CFDP revisions will take longer and not collide then my tendency would be to let him do it.  It could, of course, be done in one WG with two "products" and maybe that would be clearer.  I do have a concern that we may wind up having to process and re-issue two versions of the same document too close together and think that would not be a good thing because of the impact on CCSDS and agency resources.  However, if the Pink Sheets are quick and the more extensive CFDP revisions are likely to take a couple of years to process that does not seem like a huge burden.

To be frank, Gippo, I am far more worried about the impact on limited CCSDS resources from the growing list of "space link" WGs.  Right now we have Space Link Protocols, Next Generation Uplink, and now a proposal for Planetary Comm which appears to completely overlap these other two buit with separate leadership.  There is, of course, also a SOIS On-board Wireless WG as well, but that does not appears to be an intersecting application domain, unless, of course, it includes HSF EVA, in which case it could easily overlap these other 2 (or 3) WGs.

Just what is the rationale for all of these overlapping WGs in the SLS area and how do you propose to deal with these real and/or potential collisions and resource contention?

Regards, Peter



From: Gian Paolo Calzolari <Gian.Paolo.Calzolari at esa.int<mailto:Gian.Paolo.Calzolari at esa.int>>
Date: Tuesday, July 23, 2013 2:44 AM
To: Keith Scott <kscott at mitre.org<mailto:kscott at mitre.org>>
Cc: CCSDS Engineering Steering Group - CESG Exec <cesg at mailman.ccsds.org<mailto:cesg at mailman.ccsds.org>>
Subject: [CESG] RE: Projects for CFDP Blue Book / was: Draft CFDP Pink Sheet supporting an optional 'finished' PDU in class-1

OK, Keith, let's assume that the sharing between SIS-DTN and SIS-CFDP working on the same book is OK with SIS-DTN producing Issue 5  (*) and SIS-CFDP eventually producing issue 6 (#).
It remains the point of expressing this properly to all the approving communities (i.e. CESG now, and eventually CMC; and with respect to CMC is also mandatory the CWE Project linked to WG creation as the CWE Project is the only place where resources are identified).
Therefore the correct relationship between the two WGs and Projects has to be clear in both the SIS-CFDP Charter and in the (to be added) CWE Project for CFDP Book Issue 6.
Let's also assume that pink sheets go out quickly. Even with  a fast agency review, is publication before Fall 2013 possible?
If not, does it make sense to approve now creation of SIS-CFDP for San Antonio (also considering that there is large overlap in the actual people involved in SIS-DTN for the specific CWE Project) .

Note that I am not against the SIS-CFDP WG, but I would like to avoid seeing CMC blaming CESG for missing information etc.
Moreover, I would really appreciate listening to the opinion of other CESGers.

Best Regards

Gian Paolo

(*) formally speaking, as SIS-DTN will produce Issue 5 of the Book, SIS-CFDP cannot claim they will do the 5 years review as the Issue 5 will be dated sometimes in 2014 :o)
(#) It is likely that Issue 6 would be dated 1 year or a little more from Issue 5, and in the past we tried to avoid updating docs too frequently if not strictly needed.


From:   "Scott, Keith L." <kscott at mitre.org<mailto:kscott at mitre.org>>
To:     "Gian.Paolo.Calzolari at esa.int<mailto:Gian.Paolo.Calzolari at esa.int>" <Gian.Paolo.Calzolari at esa.int<mailto:Gian.Paolo.Calzolari at esa.int>>
Cc:     "CCSDS Engineering Steering Group - CESG Exec (cesg at mailman.ccsds.org<mailto:cesg at mailman.ccsds.org>)" <cesg at mailman.ccsds.org<mailto:cesg at mailman.ccsds.org>>
Date:   23/07/2013 00:30
Subject:        RE: Projects for CFDP Blue Book / was: Draft CFDP Pink Sheet supporting an optional 'finished' PDU in class-1

________________________________



Gian-Paolo,

You are correct, except (as detailed below) I don’t think there’s a danger of having ‘concurrent / possibly conflicting changes’ to CFDP.

I think #2 (the pink sheet) can be done way before the due date, as the draft modification includes only a very minor modification of the existing protocol.  My hope is to have the pink sheet out for review within a month or so.  This would allow the pink sheet to be completed before the CFDP update WG gets under way.

Scott provided some draft project material for the CFDP update projects that I’ve also entered into the CCSDS Update WG Framework.

I don’t think there’s any danger of concurrent updates / duplication of effort since:
1)    I expect the Pink Sheet to be done before the CFDP Update WG gets well under-way
2)    The community of interested parties is small enough that the Pink Sheet material, even if not completed by the time the CFDP update WG gets going, can easily be made known to the CFDP update WG.

--keith

From: Gian.Paolo.Calzolari at esa.int<mailto:Gian.Paolo.Calzolari at esa.int> [mailto:Gian.Paolo.Calzolari at esa.int]
Sent: Monday, July 22, 2013 8:43 AM
To: Scott, Keith L.
Cc: CCSDS Engineering Steering Group - CESG Exec (cesg at mailman.ccsds.org<mailto:cesg at mailman.ccsds.org>)
Subject: Projects for CFDP Blue Book / was: Draft CFDP Pink Sheet supporting an optional 'finished' PDU in class-1

Keith,
       let me understand the situation.

1) The latest version of the CFDP Blue Book is Issue 4 dated January 2007 (see http://public.ccsds.org/publications/archive/727x0b4.pdf )
2) SIS-DTN is currently running a project titled "CFDP-over-BP Pink Sheet" for producing Issue 5 of the  CFDP Blue Book.
See http://cwe.ccsds.org/fm/Lists/Projects/DispForm.aspx?ID=199
This project is supposed to finish the work in August 2014.
3) It is proposed to create (resurrect) a SIS-CFDP WG to "accomplish the mandated 5-year reconfirmation review of the CCSDS File Delivery Protocol (CFDP) Blue Book"; i.e. to work on  CFDP Blue Book Issue 4.
4) The SIS-CFDP has currently no linked/proposed CWE Project so it is not possible to know when it will start work and will it will finish it (e.g. in parallel with SIS-DTN or after SIS-DTN issues CFDO #5?). ==> A CWE project linked to SIS-CFDP shall be created also to allow CMC to approve relevant resource needs.

It appears to me that with this situation we have a chance of having two WGs working on the same issue of the book (i.e. issue 4) unless SIS-CFDP will wait for Issue 5 being finalized bu SIS-DTN.

Sorry, but I am just puzzled.
Can you shed some more light?

Gian Paolo
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