[CESG] "User Services" // SLS strategic goal 3 change

Gian.Paolo.Calzolari at esa.int Gian.Paolo.Calzolari at esa.int
Mon Apr 16 19:30:09 UTC 2018

        after quick SLS discussion, we decided that we are going to change 
it to:

To provide efficient and operable space data link protocols and related 
interfaces to space link transfer services (for e.g. Space Packet 
Protocol, Encapsulation Service, IP over CCSDS)    capable of satisfying 
the needs of current and future missions; 


Gian Paolo

From:   "Shames, Peter M (312B)" <peter.m.shames at jpl.nasa.gov>
To:     Gian Paolo Calzolari <Gian.Paolo.Calzolari at esa.int>
Cc:     "Margherita.di.Giulio at esa.int" <Margherita.di.Giulio at esa.int>, 
"Tai, Wallace S (9000)" <wallace.s.tai at jpl.nasa.gov>, "CCSDS Engineering 
Steering Group - CESG Exec" <cesg at mailman.ccsds.org>
Date:   16/04/2018 16:09
Subject:        "User Services"

Hi Gippo,
My suggestion is that you change "user services" on that last slide to 
something like "link layer interface and adaptation".  I do not believe 
that any of the things that SLS addresses are in any sense "user 
services".  But all of these SPP, Encap, IP over CCSDS are definitely 
interfaces to the link layer or adaptations to the link layer.
And yes, I do know that we talk, in the abstract, about service access 
points on all of our layers, which is where the "provided services" are 
exposed.  This is ISO speak.   But these are not really user services and 
to characterize them as such is somewhat confusing and also is outside the 
charter of SLS in general.
Thanks, Peter

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