[CMC] RE : [CESG] Draft-4 CCSDS report to IOAG-11

[Chris.Taylor at esa.int]

One other point that I missed previously. The diagrams only show the AOS
frame and not the conventional frame used by most spacecraft. We do not
implement the bitstream service over the convention TM frame (it's not a
CCSDS defined service) and have no flight products to support it . This makes
it even more difficult to support the idea of HDLC inside a bitstream.

Am I missing something here, or is it being proposed that we only use the AOS
frame in all our spacecraft? I assume we need diagrams that include the use
of the conventional frame and here we can only support IP via encapsulation
or direct multiplexing. Bit stream HDLC is not an option.


//ct


                                                                             
             Moury Gilles                                                    
             <gilles.moury at cnes                                              
             .fr>                                                         To 
             Sent by:                   "Adrian J. Hooke"                    
             cesg-bounces at mailm         <adrian.j.hooke at jpl.nasa.gov>, CCSDS 
             an.ccsds.org               Engineering Steering Group - ADs     
                                        <cesg at mailman.ccsds.org>             
                                                                          cc 
             13/06/2007 10:24           greg.kazz at jpl.nasa.gov, CCSDS        
                                        Management Council                   
                                        <cmc at mailman.ccsds.org>,             
                                        kscott at mitre.org                     
                                                                     Subject 
                                        RE : [CESG] Draft-4 CCSDS report to  
                                        IOAG-11                              
                                                                             
                                                                             
                                                                             
                                                                             
                                                                             
                                                                             




Adrian,

Just 2 comments on the proposed slides :

- slides 17, 18 : options 3 and 5 should not be options proposed by CCSDS for
future cross-support by IOAG member agencies' ground infrastructure. Those
options are technically unwise (adding unecessary overhead) and violates
CCSDS recommended practice for IP packets transfer over CCSDS space links.
This position has been expressed by ESA and CNES during the red book review
of "IP over CCSDS links" (see attached RID)

- slide 7 : unreadable (editorial).

Best regards,

Gilles.


Gilles MOURY
CNES Toulouse


-----Message d'origine-----
De : cesg-bounces at mailman.ccsds.org [mailto:cesg-bounces at mailman.ccsds.org]
De la part de Adrian J. Hooke
Envoyé : mardi 12 juin 2007 17:07
À : CCSDS Engineering Steering Group - ADs
Cc : greg.kazz at jpl.nasa.gov; CCSDS Management Council; kscott at mitre.org
Objet : [CESG] Draft-4 CCSDS report to IOAG-11
Importance : Haute


Attached is Draft-4 of the CCSDS Liaison report, which Nestor and I
will deliver at next week's IOAG-11 meeting in Cebreros:
http://www.ioag.org/IOAG-11/IOAG-11_home.htm

Please note the following changes:

1. Minor schedule changes on slides 8, 9 (from Erik)

2. Clarification of the Options in slides 16-18, including addition
of slide 17.

The presentation is best viewed in slide show mode, as it is animated.

Best regards
Adrian
(See attached file: CNES RID1 IP over CCSDS.txt)
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