1. SOIS Prototyping Activities
CCSDS SOIS
Berlin 2008
C. Taylor ESA- ESTEC
Chris Taylor TEC-EDS

2. Implementation Progress
ESA now has an initial prototype of the SOIS services as provided under contract by SciSys (UK) and Astrium (F). Additional prototyping is underway by Saab Space (S) and various Application support services have already been prototyped by Nasa (APL AMS). Related developments such as BioNet are also available
The SOIS prototype includes subnetwork protocols based on ECSS Milbus and Spacewire standards, and Application support services based on CCSDS and commercial protocols
The details of the present implementations are covered elsewhere and a final report of the ESA implementation will be available shortly
It would now appear to be an optimum time to consider cooperative prototyping with a view to improving and validating SOIS
Chris Taylor TEC-EDS

3. Prototyping Objectives
There are a number of objectives for joint prototyping:
To validate SOIS services executing on existing protocols
To validate SOIS defined protocols supporting SOIS services
To further develop/validate concepts and protocols
To increase cooperation and practical feedback
All of the above are valid but may have different Agency emphasis and priorities
At ESA the immediate priority is to validate the SOIS subnetwork services over existing Milbus and Spacewire protocols as this allows product development and project take-up
We would also like to pursue the P&P concepts as we believe we have exhausted the paper exercise
Ultimately we will need to validate the complete SOIS stack by interoperability testing
Chris Taylor TEC-EDS

4. What ESA can offer
Our implementation is based on a Leon 2 RTEMS configuration with Milbus and SpaceWire subnets
The following is available:
Hardware platform – commercial item
Milbus and SpaceWire drivers – RTEMS release
Milbus Protocol – ECSS spec
SpaceWire protocols – ECSS spec and SciSys implementation (under licence)
For remote connectivity we propose the use spacewire over IP
Spacewire IP tunnel - commercial item
Virtual SpaceWire router - SciSys
Chris Taylor TEC-EDS

5. SOIS – Basic configuration
Test
Apps
SOIS Application support API’s
Application support Protocols
SOIS Subnetwork API’s
Protocol’s
Protocols
Driver
Driver
Milbus
SpaceWire
SpW
Router
Remote
Implementation
Test Hardware
Test Hardware
SpW
IP Tunnel
Chris Taylor TEC-EDS

6. SOIS – Interoperability Testing example
Milbus
Spacewire
Driver
SOIS Subnetwork API’s
Protocol’s
Protocols
SOIS Application support API’s
SpW
Router
IP Tunnel
Application support Protocols
Test Hardware
Test
Apps
Milbus
Spacewire
Driver
SOIS Subnetwork API’s
Protocol’s
Protocols
SOIS Application support API’s
SpW
Router
IP Tunnel
Application support Protocols
Test Hardware
Test
Apps
Internet
Chris Taylor TEC-EDS

7. ESA text-bed extensions
Test
Apps
CFDP
SOIS Application support API’s
Application support Protocols
DTN
SOIS Subnetwork API’s
TM/TC
Packet
Wire
Driver
Protocol
Wireless
Protocol
Driver
SpaceWire
TM/TC
Test Hardware
External
Connectivity
Chris Taylor TEC-EDS

8. Prototyping – essential agreements
To initiate prototyping activities a number of core agreements will be necessary:
Remote connectivity e.g. SpaceWire IP tunnel
Core services – Packet, Remote Memory Access, Device discovery, (sync)
Core protocols – Packet, RMAP, Device Discovery
Set of test applications to confirm basic connectivity - TBD
Set of test hardware - TBD
All of the above are available commercially or from the ESA implementation
Once the above are in place we can perform more specific prototyping, for example on the P&P
Chris Taylor TEC-EDS

9. Prototyping Summary
It is clear that we have reached the point where more prototyping is needed and would be beneficial to all
But to fully benefit from prototyping activities we need:
Clear goals on what we want to test and why
Agreed configurations
Test procedures and test reports
Chris Taylor TEC-EDS

10. Subnetwork WG summary
All Red books reviewed, updates necessary (Dai), Review (all)
Suggest that Red books are then frozen and possibly published
Define test configurations (Q109)
SOIS/Bionet (Kevin/Chris)
XTEDs/SOIS (Glenn/…Kevin/Chris)
XTEDs Software simulator (kevin)
XTEDs world wide availability (Chris)
Green Book updates (separate list) Review (all)
Chris Taylor TEC-EDS