[CESG] Action CMC-A-2012-04-07

Scott, Keith L. kscott at mitre.org
Thu Jan 24 16:19:15 EST 2013

Proposed updated SIS text:

The objective of the Space Internetworking Services (SIS) Area is to address all of the routine communications services and protocols supporting end-to-end communications among applications, particularly where these communications may span multiple heterogeneous technologies.  Areas addressed by SIS include the networking infrastructure to support application-to-application communication onboard a single spacecraft, communications among multiple spacecraft, and communications between space-based applications and their counterparts on Earth and/or other planetary bodies.

The SIS Area deals with communication services and protocols that are independent of specific link technology (as a lower layer bound) and independent of application-specific semantics (as an upper bound).  Thus the SIS area covers essentially the network through application layers of the OSI reference model.

SIS protocols use the underlying communication and infrastructure services provided by the Space Link Services (SLS) and Spacecraft Onboard Interface Services (SOIS) areas and any other onboard networks, and provide the networked connectivity needed by applications developed in other CCSDS areas such as Mission Operations and Information Management (MOIMS) and Spacecraft Onboard iInterface Services (SOIS).  The SIS services provide hardware-independent mechanisms for identifying end systems, and provide communications services that allow users to disregard whether the communication is over a single data link layer or over multiple hops.  The capabilities developed by the SIS Area accommodate all ranges of delay, interactivity, and directionality, although not all protocols are appropriate for all environments.

The services provided by SIS protocols free applications from having to have intimate knowledge of the underlying communications protocols and mechanisms, and from having to know the physical location(s) of the entities with which they are communicating.  This enables applications to focus on the application-specific protocols and interactions necessary to achieve their goals without having to be involved in the details of communications.

The strategic goals of the SIS Area are:

a)    To actively promote the use of Internet standards for data transport, routing, and auxiliary functions in environments where end-to-end paths exist and are relatively stable.  This includes the use of TCP (including options defined by CCSDS and/or IETF) when round trip times are low (~<2s), and possible use of UDP for unidirectional paths and/or high delays.

b)    By 2018: to enable routine communications between Earth and 4-6 lunar and/or near-Earth missions using  SIS recommendations for application, transport, and network services (including the standard Internet suite).

c)     By 2020: to evolve CFDP to be a purely application-layer protocol able to run over a range of transfer, specifically including the Bundle Protocol and Licklider Transmission Protocol.

d)    By 2020: to enable routine Solar System Internet (SSI) operations among at least 20 entities communicating over interplanetary distances by means of Delay-Tolerant Networking protocols.


From: cesg-bounces at mailman.ccsds.org [mailto:cesg-bounces at mailman.ccsds.org] On Behalf Of Nestor.Peccia at esa.int
Sent: Wednesday, January 23, 2013 9:02 AM
To: cesg at mailman.ccsds.org
Subject: [CESG] Action CMC-A-2012-04-07


Dear all,

We need your collaboration

During the CMC discussion of " the big picture" the issue of our open action CMC-A-2012-04-07 came back.

In order to avoid more work that the one specified in the action (see below)
CMC instructs the CESG Chairs and Area Directors to review the current strategic plan and update as necessary to include strategic planning for each area, an overview of CCSDS activities, how the Area/WG activities are "wired" (interdependent) and how they support other activities. There should be an emphasis on the capabilities that result from the activities of the areas, in order to support decisions about starting new work or continuing existing work.
Action: CESG
Due Date: Spring 2013 Meeting (status update at Fall 2012 CMC meeting, with examples)
Status: Open

it was proposed to change the action due date from Spring 2013 to end February 2013.

In order to tackle the action, I would propose a two phase approach
*        ADs / DADs update the half page Area strategy (including interdependent activities and capabilities) (see example below for MOIMS text to be updated)         24th January 2013
*        NestorI consolidates all the inputs                                                                                                                                27th January 2013
*        CESG Chair propose updates to all other sections                                                                                                                15th February 2013
*        CESG agrees on document to be sent to CMC for comments.                                                                                                        28th February 2013

Example for MOIMS


The objective of the Mission Operations and Information Management Services (MOIMS) Area is to address all of the flight execution phase applications that are required to operate the spacecraft and its ground system in response to mission objectives, and their associated detailed information management standards and processes. The focus of this Area is primarily on the "mission operations" functions that occur on a timescale driven by the flight path of the space vehicle. In many cases a dedicated community conducts these mission operations, while "mission utilization" occurs on a timescale that is convenient for users and is often conducted by a separate community. The MOIMS Area ensures that application standards exist which facilitate the smooth transition of space mission information between the "mission operations" systems and the "mission utilization" systems

The strategic goals of the MOIMS Area are:
*        By 2006: to develop and deploy the standards that specify an extensible framework for packaging data and metadata.
*        By 2006: to develop and deploy the standards for the exchange of Navigation information (e.g. position, velocity and attitude) by establishing content and format for tracking, attitude, trajectory and ancillary data (e.g., gravity models, spacecraft orientation).
*        By 2008: to develop and deploy the standards for the submission and ingest of   digital data sources and digital metadata to the Archive, for the identification of digital data within the Archive and for the search and retrieval of digital data and metadata.
*        By 2008: to deploy and develop a suite of standard spacecraft Monitor and Control (M&C) services that are exposed for cross support interfaces between M&C and other mission components

[attachment "CCSDS-StratPlan-A01x1y1x1-d5v3-Sep06.doc" deleted by Nestor Peccia/esoc/ESA]


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