[Sis-dtn] [CCSDS Fall2025] Joint Meeting Relay-Support/Delivery Agent MOIMS-SM&C/SEA-SA/SIS-DTN/CSS

[Churlaud Olivier]

Dear all,

We had discussions between the DTN and MOIMS-SM&C WGs concerning a "CCSDS Delivery Agent" in charge of a "First Hop" and "Last Hop", described in

*         [1] sections 6.5.3

*         [2] section 6.6

During the discussion, it appeared to SM&C that it could be seen as a way to coordinate supports in relay operations within a DTN Network (or even not DTN?)

We would like to organize a joint meeting with the following questions:

-       Is it something CCSDS should work on?

-       Is it framed correctly? If not, how can we improve?

-       How should we coordinate between the relevant WG?

As it deals with cross-support, we thought CSS should be involved.
As it deals with DTN, DTN-SIS needs to be present.
As it seems a very wide topic, SEA-SA would be needed to help us frame the topic.

We (SM&C) prepared the slides that are attached to this email to support the discussion.
We are still working on realistic use cases from our agencies' experts.

When this joint-meeting could happen? On SM&C side, we haven't set our agenda, so we have no constrain.

Thank you
Olivier, for MOIMS-SM&C


[1] https://ccsds.org/Pubs/901x0g1.pdf
[2] https://ioag.org/wp-content/uploads/gravity_forms/6-1a23b5e730ab942f4b44183168a5bb93/2025/04/SISG-Operations-Concept-for-SSI-final-version.pdf

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