[Sis-dtn] RE: DTPC RID against BP-for-CCSDS

Fri Oct 17 15:17:06 UTC 2014

Scott,
        just as devil's advocate, since the Annex would not be exhaustive 
of all "specific ways" of implementing the service, a caveat for the 
limits of applicability of the Annex and for remarking that other 
"specific ways" can be compliant with the Blue Book is strongly required.

Regards

Gian Paolo

From:   "Scott, Keith L." <kscott at mitre.org>
To:     "Felix.Flentge at esa.int" <Felix.Flentge at esa.int>, 
Cc:     "Chris Taylor \(chris.taylor at esa.int\)" <chris.taylor at esa.int>, 
"sis-dtn at mailman.ccsds.org" <sis-dtn at mailman.ccsds.org>
Date:   17/10/2014 16:24
Subject:        [Sis-dtn] RE: DTPC RID against BP-for-CCSDS
Sent by:        sis-dtn-bounces at mailman.ccsds.org

Great, thanks much.

                        --keith

From: Felix.Flentge at esa.int [mailto:Felix.Flentge at esa.int] 
Sent: Friday, October 17, 2014 10:06 AM
To: Scott, Keith L.
Cc: Chris Taylor (chris.taylor at esa.int); Pitts, Robert L. (MSFC-EO50)[HOSC 
SERVICES CONTRACT]; sis-dtn at mailman.ccsds.org
Subject: Re: DTPC RID against BP-for-CCSDS

Dear Keith, 

fine for me. I have been assuming that there are some practical reasons to 
have it in the BP book and I am happy to hear that there is also an 
implementation in DTN2. 

Regards,
Felix 
-- 
Dr. Felix Flentge
ESA/ESOC - European Space Agency / European Space Operations Centre
Human Spaceflight and Operations, Ground Segment Engineering Department, 
HSO-GIB
ESA/ESOC, Robert-Bosch-Strasse 5, D-64293 Darmstadt, Germany
Tel: +49 6151 90 3173
e-mail: Felix.Flentge at esa.int 

From:        "Scott, Keith L." <kscott at mitre.org> 
To:        "felix.flentge at esa.int" <felix.flentge at esa.int>, 
Cc:        "Chris Taylor (chris.taylor at esa.int)" <chris.taylor at esa.int>, 
"Pitts, Robert L. (MSFC-EO50)[HOSC SERVICES CONTRACT]" <
robert.l.pitts at nasa.gov>, "sis-dtn at mailman.ccsds.org" <
sis-dtn at mailman.ccsds.org> 
Date:        17/10/2014 15:26 
Subject:        DTPC RID against BP-for-CCSDS 

Felix, 

First, thanks very much for your review and RIDS on the BP-for-CCSDS book. 
 I think they?ve improved the book?s overall quality. 

Regarding your RID against the Delay-Tolerant Payload Conditioning 
Specification: 
I am wondering if  "Annex E Delay-Tolerant Payload Conditioning 
Specification" should not be a separate document. For me it is a specific 
way (an ?application service?) of how to apply BP and does not need to be 
part of the CCSDS BP Standard. Also, I am not sure about the maturity of 
that protocol (Has it been tested with two independent implementations?). 
So, it might be better to separate it (maybe as a Magenta Book) and have 
"independent lifecycles". 

I think the WG?s current leaning is to reject the RID and keep the DTPC 
annex in the book.  I would concur that in a perfect world it would be 
split off as a separate book, but as I recall the capability was strongly 
desired and there was some concern about ?# of books explosion? and the 
agency review resources that would be needed if it were done separately. 
Also, removing the annex now would require another agency review. 

There are two implementations of DTPC (ION and DTN2), and since it?s a 
normative part of the book it WILL be interoperability tested before the 
book goes Blue. 

Given the above, I think the WG would like to reject the RID and keep DTPC 
in the current book.  Would you be able to concur with this? 

                        Best Regards, 

                                    --keith 

Dr. Keith Scott                                Office: +1.703.983.6547 
Chief Engineer, J86A                         Fax:      +1.703.983.7142 
Communications Network Engineering & Analysis                     Email: 
kscott at mitre.org 
The MITRE Corporation                   M/S H300 
7515 Colshire Drive 
McLean, VA 22102 

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