1. 1 Cross Support Architecture (CSAWG) Overview, Status, Goals Takahiro Yamada JAXA

2. 2 Objective (Present) Create a CCSDS Recommended Practice for a Space Communication Cross Support Service Architecture CCSDS Recommended Standard to guide the creation of Cross Support Service Catalogs CCSDS Recommended Standard to guide the creation of Cross Support Service Agreements Working Group Overview Space Communication Cross Support Architecture CCSDS Reference Architecture Space Communication Cross Support Services Space Communication Cross Support Service Catalog Agency Space Communication Cross Support Service Catalog Space Communication Cross Support Service Agreement Project Space Communication Cross Support Service Agreement

3. 3 STATUS Documents Draft available for Architecture book and Service Agreements book. Service Catalogs book to be developed. New Project IOAG asked CCSDS to take over and finalise the IOAG SISG ADD. At the previous meeting, we agreed to do that it if some more resources are available from DTN WG. We also agreed to re-factor the book into two parts: - Conventional configurations - Internetworking configurations After the meeting, some WG members discussed the contents of the re-factored books (see another slide).

4. 4 Goals for May Meeting Space Communication Cross Support Architecture Space Communication Cross Support Service Catalog Space Communication Cross Support Service Agreement Consider how to combine with the SISG ADD (see next slide) Discuss how to generate it Review the draft document

5. 5 Structure of the Architecture Books The following diagram shows an idea on re-factoring existing CCSDS documents related to space communications architectures and the IOAG SISG ADD. Space Communication Cross Support Architecture IOAG SISG Architecture Description Document Overview of Space Communications Protocols Existing DocumentsDocuments to be Developed Space Communication Cross Support Reference Architecture Space Communication Cross Support Architecture (Link Level) Space Communication Cross Support Architecture (Network Level)

6. 6 CSAWG ISSUES/CONCERNS IssueDescriptionImpactApproach Re-factoring of architecture books There are some books that are related to space communications architectures, but they are not necessarily harmonized with each other. If we keep publishing architecture documents without harmonizing them, they may confuse the users. Rewrite documents using the style of the existing Space Communication Cross Support Architecture document. Relationship with the to-be- developed CCSDS Reference Architecture document Our architecture documents also need to be harmonized with the to-be- developed CCSDS Reference Architecture document If we keep publishing architecture documents without harmonizing them, they may confuse the users. The CCSDS Reference Architecture document should be developed in close coordination with this WG. Lack of resources There are not enough resources to complete (write and review) the documents. We must delay the publication of the documents unless more resources are available. Ask CMC or IOAG?

7. 7 CSAWG AGENDA