1. 1 Space Communications Cross Support Architecture WG: Charter and Work Plan October 2010 London, UK Takahiro Yamada, JAXA/ISAS

2. 2 Introduction  This presentation shows:  the charter of the Space Communications Cross Support Architecture WG,  the current status of each item defined in the charter, and  goals of this meeting.

3. 3 Goals Defined in the Current Charter 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 Space Communication Cross Support Architecture Reference Architecture for Space Data Systems (RASDS) 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

4. 4 Status of Each Item Defined in the Charter  Space Communication Cross Support Architecture recommended practice  A White Book (issue 1.1) is available.  The IOAG asked us to take care of their SISG ADD.  We came up with the document structure shown on following page.  Relationship with RA SIG work?  Recommended standard for service catalogs  ?  Recommended standard for service agreements  A draft was distributed by Kelliher in May 2010.  Comments by Hell.

5. Structure of Architecture Documents 5 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 and Network Level)

6. Goals for This Meeting 6 Discuss the relationship with the deliverables of RASIG/RAWG Review the draft document Joint session with SM WG Space Communication Cross Support Reference Architecture Space Communication Cross Support Architecture (Link and Network Level) Space Communication Cross Support Service Catalog Space Communication Cross Support Service Agreement Find document editors

7. 7 Production Schedule NameCategorySchedule Space Communication Cross Support Reference Architecture Recommended Best Practice (Magenta Book) ? Space Communication Cross Support Architecture (Link and Network Level) Recommended Best Practice (Magenta Book) ? Cross Support Service Catalog Recommended Standard (Blue Book) ? Cross Support Service Agreement Recommended Standard (Blue Book) ?

8. Schedule for This Week 8

9. General Architecture Issues 9

10. Issue 1  There are multiple CCSDS documents that specify an architecture:  Reference Architecture for Space Data Systems (RASDS) (SAWG)  Reference Architecture for Space Information Systems (IAWG)  Space Communication Cross Support Architecture (CSAWG)  Cross Support Reference Model (CSS)  Mission Operations Architecture (SMCWG)  Spacecraft Onboard Interface Architecture (SOIS)  Overall CCSDS Architecture (RASIG) 10

11. Issue 2  Some of these books define viewpoints according to IEEE 1471 or ISO 42010  Should all of the viewpoints be defined in a single document? If so, what document should define the viewpoints?  Should each of the documents define the viewpoints that are necessary in the document? If so, how can we maintain consistency among different viewpoints definitions? 11

12. Issue 3  Where are the boundaries among different sets of services?  Where is the boundary between space communication services and mission operation services? Where do SLE services belong to? Where does SLE SM belong to?  Where is the boundary between space information services and mission operation services?  Where do the SOIS services belong to?  Where should these boundaries be defined and documented? I think we need a SIG to resolve these issues. 12

13. Proposed Architecture Document Structure 13 CCSDS Reference Architecture RASDS Space Comm. Cross Support Reference Architecture Space Comm. Cross Support Architecture (Network) Space Comm. Cross Support Architecture (Link) Mission Operation Cross Support Architecture Information Service Cross Support Architecture RA BoF ISA BoFSMC WGCSA WG CSA WG? A B Shows that B specializes A Where is SOIS?