[Sls-slp] Results of Discussion with Takahiro Yamada on Revising SPP Blue Book

Gian.Paolo.Calzolari at esa.int Gian.Paolo.Calzolari at esa.int
Tue Jan 30 13:54:51 UTC 2018

        what we have to be sure it captured in our CCSDS  books is the 
following situation (e.g. for a TM/AOS link)
There multiple sources generating packet contents and asking creation of 
Those packets are created with different APIDs depending on the source
Those different APIDs shall be multiplexed to produce a single packet 
This single packet stream is then injected in in a VC

It is then correct that "The current AOS SDLP version i.e., CCSDS 
732.0-B-3 Sept 2015 is agnostic about “packet channels”  and “Individual 
CCSDS packets from multiple sources” (implying multiple APIDs). It is 
really only concerned about multiplexing of packets with different PVNs 
onto VCs." In fact AOS would only see that single stream.
All the rest shall be done above the SDLP.

We shall check also what we lost with respect to CCSDS 103.0-B-2 (now 
silver) where there was a nice picture for which I attach a detail.
Another document to be checked for losses is CCSDS 203.0-B-2 and even FSP 
that mention APID multiplexing if I remember well.

Finally we shall verify all fits within the encapsulation service.


Gian Paolo

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