[CESG] CESG-P-2020-09-005 Approval to publish CCSDS 720.2-G-4, CCSDS File Delivery Protocol (CFDP)—Part 2: Implementers Guide (Green Book, Issue 4)

[CCSDS Secretariat]

Dear CESG Members,

Conditions for approval of CCSDS 720.2-G-4, CCSDS 
File Delivery Protocol (CFDP)—Part 
2:  Implementers Guide (Green Book, Issue 4) have 
been disposed to the satisfaction of the AD(s) 
who voted to approve with conditions. The 
Secretariat will now proceed with CMC polling to authorize publication.
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From:	Burleigh, Scott C (US 312B) <scott.c.burleigh at jpl.nasa.gov>
Sent:	Thursday, January 28, 2021 11:50 AM
To:	Thomas Gannett
Subject:	FW: [EXTERNAL] Re: CESG-P-2020-09-005 Approval to publish CCSDS 
720.2-G-4, CCSDS   File Delivery Protocol (CFDP)—Part 2:  
Implementers  Guide (Green Book, Issue 4)

And here is Gian Paolo’s clearance of the conditions on the Part 2 book.  I think that covers 
everything?  Let me know if you need copies of the updated documents.

Scott

From: Burleigh, Scott C (US 312B)  
Sent: Friday, December 18, 2020 7:15 AM 
To: Gian.Paolo.Calzolari at esa.int 
Cc: Barkley, Erik J (US 3970) <Erik.J.Barkley at jpl.nasa.gov>; jonathan.j.wilmot at nasa.gov; CCSDS 
Secretariat <thomas.gannett at tgannett.net> 
Subject: RE: [EXTERNAL] Re: CESG-P-2020-09-005 Approval to publish CCSDS 720.2-G-4, CCSDS File 
Delivery Protocol (CFDP)—Part 2: Implementers Guide (Green Book, Issue 4)

Gian Paolo, thank you!

The second copy of the file was an artifact of switching message format to Rich Text after the first copy 
was attached – the first copy no longer appeared, so I thought it had been removed.  The mysteries of 
Outlook.

Best wishes for a peaceful, hilarious holiday,
Scott

From: Gian.Paolo.Calzolari at esa.int <Gian.Paolo.Calzolari at esa.int>  
Sent: Friday, December 18, 2020 2:05 AM 
To: Burleigh, Scott C (US 312B) <scott.c.burleigh at jpl.nasa.gov> 
Cc: Barkley, Erik J (US 3970) <erik.j.barkley at jpl.nasa.gov>; jonathan.j.wilmot at nasa.gov; CCSDS 
Secretariat <thomas.gannett at tgannett.net> 
Subject: RE: [EXTERNAL] Re: CESG-P-2020-09-005 Approval to publish CCSDS 720.2-G-4, CCSDS File 
Delivery Protocol (CFDP)—Part 2: Implementers Guide (Green Book, Issue 4)

Scott,  
        here below my remarks  
 
1) SCPS_NP has been deprecated by CCSDS, please amend document accordingly (e.g. section 6.2.5 
CAPABILITIES MATRIX & 6.3.2.2 CFDP Implementation Survey)  
==> SCPS removed. Condition satisfied.    
2) Add USLP where needed (e.g. section 6.2.5 CAPABILITIES MATRIX & 6.3.2.2 CFDP Implementation 
Survey)  
==> USLP added to sections 6.2.5 & 6.3.2.2 . Condition satisfied.    
3) add USLP to section 6.3.3 CFDP VS. OSI MODEL LAYERING CONTEXT  
==> USLP added to sections 6.3.3 . Condition satisfied.    
 
Regards and stay healthy!  
 
Gian Paolo  
 
PS There were two copies of the winword file attached (according to Lotus Notes). I did not do any check 
and I assumed they were identical.  
 
 
 
From:        "Burleigh, Scott C (US 312B)" <scott.c.burleigh at jpl.nasa.gov>  
To:        "Gian.Paolo.Calzolari at esa.int" <Gian.Paolo.Calzolari at esa.int>  
Cc:        "CCSDS Secretariat" <thomas.gannett at tgannett.net>, "Barkley, Erik J (US 3970)" 
<erik.j.barkley at jpl.nasa.gov>, "jonathan.j.wilmot at nasa.gov" <jonathan.j.wilmot at nasa.gov>  
Date:        17-12-20 23:13  
Subject:        RE: [EXTERNAL] Re: CESG-P-2020-09-005 Approval to publish CCSDS 720.2-G-4, CCSDS   File 
Delivery Protocol (CFDP)—Part 2:  Implementers  Guide (Green Book, Issue 4) 
 
 
 
 
Hi, Gian Paolo.  Would you please take a look at the attached revised CFDP Green Book Part 2 and let me 
know if it satisfies your conditions on publication approval?  SCPS NP has been replaced by USLP in 
sections 6.2.5 and 6.3.2.2, and USLP had been added to 6.3.3.  
   
On other points: 
*	Erik: I of course think that Unacknowledged CFDP over an LTP or BP/LTP UT layer is the best 
configuration for interplanetary file transfer, but I think the definitions of those configurations 
ultimately need to be standardized in Blue or maybe Magenta books.  I don't think this CFDP 
Implementation green book is the right place to get into that. 
*	Jonathan: I agree, this book would benefit from inclusion of reports on more recent 
implementations of CFDP - in particular, CFDPv1, now that the standard has been published.  
   
Thanks,  
Scott  
   
   
-----Original Message----- 
From: CCSDS Secretariat <thomas.gannett at tgannett.net>  
Sent: Thursday, October 15, 2020 1:33 PM 
To: Burleigh, Scott C (US 312B) <scott.c.burleigh at jpl.nasa.gov> 
Cc: Burleigh, Scott C (US 312B) <scott.c.burleigh at jpl.nasa.gov>; Gian.Paolo.Calzolari at esa.int 
Subject: [EXTERNAL] Re: CESG-P-2020-09-005 Approval to publish CCSDS 720.2-G-4, CCSDS File 
Delivery Protocol (CFDP)—Part 2: Implementers Guide (Green Book, Issue 4)  
   
Dear Document Rapporteur,  
   
The CESG poll to approve publication of CCSDS 720.2-G-4, CCSDS File Delivery Protocol (CFDP)—
Part 2:  Implementers Guide (Green Book, Issue 4) concluded with conditions. Please negotiate 
disposition of the conditions directly with the AD(s) who voted to approve with conditions and 
CC the Secretariat on all related correspondence.  
   
   
CESG E-Poll Identifier:  CESG-P-2020-09-005 Approval to publish CCSDS 720.2-G-4, CCSDS File 
Delivery Protocol (CFDP)—Part 2:  Implementers Guide (Green Book, Issue 4) Results of CESG 
poll beginning 30 September 2020 and ending 14 October 2020:  
   
                 Abstain:  0 (0%) Approve  
Unconditionally:  3 (60%) (Barkley, Shames, Wilmot) Approve with Conditions:  2 (40%) 
(Burleigh, Calzolari) Disapprove with Comment:  0 (0%)  
CONDITIONS/COMMENTS:  
   
     Erik Barkley (Approve  
Unconditionally):  Just a general question:  does there need to be or can there be any guidance 
offered for implementing CFDP over BP?  
     Scott Burleigh (Approve with  
Conditions):   It has been brought to my  
attention that the data items referred to as "counters" in section 4 are actually limits on 
counters rather than the counters themselves.  This language should be clarified.  
   
     Gian Paolo Calzolari (Approve with  
Conditions):  1) SCPS_NP has been deprecated by CCSDS, please amend document accordingly 
(e.g.  
section 6.2.5 CAPABILITIES MATRIX & 6.3.2.2 CFDP Implementation Survey)  
   
2) Add USLP where needed (e.g. section 6.2.5 CAPABILITIES MATRIX & 6.3.2.2 CFDP 
Implementation Survey)  
   
3) add USLP to section 6.3.3 CFDP VS. OSI MODEL LAYERING CONTEXT  
   
     Jonathan Wilmot (Approve  
Unconditionally):  No real issues, but the implementations are old and do not represent modern 
mission use cases. For example, LRO, GPM, MMS, GEDI, and others had to compress the NAKS 
so that they fit in the available uplink. This occurs with our now typical asymmetric links (64Kbps 
up and >=100Mbps down). All these missions also had to implement downlink throttling 
interfaces to maintain throughput.  
   
At the next five year review it would be good to update this book.  
   
   
   
   
Total Respondents:  5  
   
No response was received from the following Area(s):  
   
     MOIMS  
   
   
   
SECRETARIAT INTERPRETATION OF RESULTS:  Approved with Conditions  
PROPOSED SECRETARIAT ACTION:            Generate  
CMC poll after conditions have been addressed  
   
* * * * * * * * * * * * * * * * * * * * * * * *  
 [attachment "720x2g4.docx" deleted by Gian Paolo Calzolari/esoc/ESA] [attachment 
"720x2g4.docx" deleted by Gian Paolo Calzolari/esoc/ESA] 
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