[Sls-slp] JAXA RID against OID Frame

Gian.Paolo.Calzolari at esa.int Gian.Paolo.Calzolari at esa.int
Tue Mar 3 18:20:49 UTC 2009

"Kazz, Greg J" <greg.j.kazz at jpl.nasa.gov> wrote on 03-03-2009 18:21:35:

> G.P.,
> But a Space Packet can contain a Secondary Header, which could 
> contain useful data as well. So in that sense, OID Packet also makes
> sense. In other words, discarding an ?Idle Packet? can have a 
> drawback or unintended consequence. CCSDS needs to use consistent 
> terminology across the board and I think that is what this JAXA rid 
> is pointing out. I am looking forward to Marjorie?s responses to 
> those rids as well.
> thanks,
> Greg

        The Frame has a structure linked to the Virtual Channel and all 
frames on a VC have the secondary header (if this is used) independently 
they are OID or not.
Conversely the Space Packet has a structure linked to the APID and a 
mission implementing a Packet Secondary Header on Idle Packets would just 
be crazy. :-) In addition, I think that, being the idle APID fixed, there 
is no chance for having a Secondary header in an Idle Packet [this is 

Comments/confirmations are welcome.


Gian Paolo
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