[CESG] Comment on the CSS Area portion of the CCSDS strategic plan

[Shames, Peter M (312B)]

As a general principle I think it is important to keep in mind that we (and many other orgs) have purposely adopted the layers defined in the ISO Basic Reference Model (BRM), ISO/IEC 8498.  We have, of course adapted it to our purposes, so we have separately identified Modulation as a standardization topic (associated with the ISO Physical Layer, and Coding, as a sub-layer of the Link Layer.

The original ISO BRM dates back to 1979, a time when “Applications” were things like FTP (for file transfer) and Telnet (for remote login).  The only other network “apps” were system utilities and things that users wrote using the socket layer.  There was no web, browsers, HTTP, XML, message busses, or any of that other stuff we all rely upon and carry around strapped to our belts.  In this age we probably need to distinguish Applications (as in all sorts of user apps), from Application Support (HTTP, message bus, SMTP, etc).   With that parsing of the layers, all of the SIS application level standardards fall into Application Support.  All of the MOIMS mission operations standards fall into Applications, whether they are the MAL (a framework that must be adapted to support mission applications), or data and process standards such as the Nav and DAI produce.  Any MOIMS MO services, like Robotics, also fall into this Applications Layer.

It’s worth noting that CSS also produces services, for cross support; services are not exclusive to MOIMS.  And SOIS has also defined services in their on-board environment.  The distinctions are tied to the domains in which they operate, cross support, spacecraft on-board, and mission operations.

Perhaps we need to document these distinctions for CCSDS purposes, but in general these are understood as stated.

Regards, Peter



From: <cesg-bounces at mailman.ccsds.org<mailto:cesg-bounces at mailman.ccsds.org>> on behalf of Mario Merri <Mario.Merri at esa.int<mailto:Mario.Merri at esa.int>>
Date: Monday, August 10, 2015 at 6:46 AM
To: Keith Scott <kscott at mitre.org<mailto:kscott at mitre.org>>
Cc: Nestor Peccia <Nestor.Peccia at esa.int<mailto:Nestor.Peccia at esa.int>>, Brian Oliver <briano at aiaa.org<mailto:briano at aiaa.org>>, CCSDS Engineering Steering Group - CESG Exec <cesg at mailman.ccsds.org<mailto:cesg at mailman.ccsds.org>>
Subject: Re: [CESG] Comment on the CSS Area portion of the CCSDS strategic plan

Keith,

1) 3rd goal: I proposed that change to make the goal consistent with your proposed change in the 2nd paragraph on top where you substituted "Application" with "Transport". No problem in leaving "applications", but then you should better qualify or limit the goal. Below a few relevant considerations from my side.

Video and Audio: my understanding is that these WGs aim at identifying interoperable solutions in terms of communications, protocol and data formats. We had already many joint meetings with Rodney on having on top of this standard Video/Camera services that could be based on MO Services. I would think the same apply to Voice. AMS is concerned with message transfer, so it is still at transport level. CFDP is a file transfer mechanism: there is already an identified MO service,  the File Management Service, that will use CFDP if this is required by the mission.

2) I think that there is no disagreement here. The main reason of my proposed change is that the MOIMS is not developing applications, but data (e.g. NAV formats) and services (e.g. MO services), therefore technically there is no "MOIMS application".

Regards,

__Mario



From:        "Scott, Keith L." <kscott at mitre.org<mailto:kscott at mitre.org>>
To:        "Mario.Merri at esa.int<mailto:Mario.Merri at esa.int>" <Mario.Merri at esa.int<mailto:Mario.Merri at esa.int>>,
Cc:        Brian Oliver <briano at aiaa.org<mailto:briano at aiaa.org>>, "cesg at mailman.ccsds.org<mailto:cesg at mailman.ccsds.org>" <cesg at mailman.ccsds.org<mailto:cesg at mailman.ccsds.org>>, "Nestor.Peccia at esa.int<mailto:Nestor.Peccia at esa.int>" <Nestor.Peccia at esa.int<mailto:Nestor.Peccia at esa.int>>
Date:        10/08/2015 15:14
Subject:        Re: [CESG] Comment on the CSS Area portion of the CCSDS strategic plan
________________________________



Mario,

Thanks for the feedback.

I’d like to leave ‘applications’ in the third SIS goal, at least for the moment.  We’ve got the Voice and Motion Imaging WGs finishing up their work, and SIS is also home to things like CFDP and AMS.  I do agree that MOIMS owns at least a large piece of the ‘applications’ space within CCSDS and it is NOT SIS’ intent to pursue application development where such applications can be taken on by other areas (e.g. MOIMS, SOIS, CSS).

You also replaced ‘MOIMS applications over SIS internetworks’ with ‘MOIMS data and services over SIS internetworks’.  I’m fine with that but I thought there was an advantage (in promoting the SIS view of the world, at least) to ‘applications’ there as it reinforced the notion that SIS was doing internetwork stuff and the things running OVER the internetwork were applications.  Regardless of the language, this (apps over network) is the view SIS would like to promote.  Are you strongly in favor of the ‘data and services’ language?  Is there a reason for your suggested change that I’m missing?


V/r,

—keith

From: "Mario.Merri at esa.int<mailto:Mario.Merri at esa.int>"
Date: Monday, August 10, 2015 at 8:56 AM
To: "Scott, Keith L."
Cc: Brian Oliver, CCSDS Exec, Nestor Peccia
Subject: Re: [CESG] Comment on the CSS Area portion of the CCSDS strategic plan

Hi Keith,

my comments embedded. Please note that for some reason, Word has decided to use the same colour (red) for both your and my changes, at least on my computer. I've unsuccessfully tried to change it.

Regards,

__Mario





From:        "Scott, Keith L." <kscott at mitre.org<mailto:kscott at mitre.org>>
To:        "Nestor.Peccia at esa.int<mailto:Nestor.Peccia at esa.int>" <Nestor.Peccia at esa.int<mailto:Nestor.Peccia at esa.int>>,
Cc:        Brian Oliver <briano at aiaa.org<mailto:briano at aiaa.org>>, "CESG -- CCSDS-Engineering Steering Group \(cesg at mailman.ccsds.org<mailto:cesg at mailman.ccsds.org>\)        \(cesg at mailman.ccsds.org<mailto:cesg at mailman.ccsds.org>\)" <cesg at mailman.ccsds.org<mailto:cesg at mailman.ccsds.org>>
Date:        10/08/2015 14:18
Subject:        Re: [CESG] Comment on the CSS Area portion of the CCSDS strategic plan
Sent by:        cesg-bounces at mailman.ccsds.org<mailto:cesg-bounces at mailman.ccsds.org>
________________________________



Proposed changes to the SIS Strategic Plan attached as a Word Document with Track Changes on.

V/r,

—keith
[attachment "Online strategic Plan 20150810.docx" deleted by Mario Merri/esoc/ESA] _______________________________________________
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