Ninth SpaceWire Working Group meeting, ESA/ESTEC

26^th and 27^th of April 2007

Proceedings (C)

Scope: The meeting was focusing on CCSDS SOIS services as defined by the corresponding draft Red Books and on their implementation on SpaceWire Network based Data Systems.

The main objectives of the meeting were essentially to:

• Provide feedback to the CCSDS SOIS Working Group on services definition and their adequacy from a SpW point of view
• Review and discuss how SpW networks can me mapped on CCSDS SOIS Sub-Network Layer services – and the reciprocal -
• Discuss Network Management and Plug&Play related topics

Day 1: Thursday 26^th of April 09:00 – 18:00

• Scope of the meeting, logistics, Agenda, ESA/ESTEC Ph. Armbruster

• Introductory presentation on Data Systems, ESA/ESTEC Ph. Armbruster

• Data Systems – Reference Architectures
• Data Systems families and Embedded Systems – Development Methodologies
• FDIR, Availability, Reliability and QoS Requirements
• Plug and Play, Plug and Confirm or Connect on Demand?

• Case study: PaDaPAr Study and demonstrator, Astrium Satellites, O. Notebaert

Summary: The PaDaPar study (Payload Data Processing ARchitecture), conducted by the data processing advanced studies engineering group at Astrium, has identified common functionalities from past and future payload applications and have defined modular architecture(s) for Payload Data Handling Systems supporting the objective of reusability of generic functions and also resource sharing for multiple instrument systems.

• Introduction on SOIS, ESA/ESTEC, C. Taylor
• SOIS architecture – Green Book
• Context and Development Status
• Objectives of the meeting

• Overview and Specific Topics on Subnetwork Services, Keltik, D. Stanton
• Overview of each service

o Addressing

o Management architecture

o QOS

o Open issues

• Overview and Specific Topics on Application layer support Services, Scisys, S. Fowell
• Overview of each service
• Device identifiers

o Plug and play

o Requirements: use cases

o Architecture: Device Discovery, Enumeration and management of Device Virtualisation & Access Services

o Comparisons with USB 2.0

o open issues

• Analysis of the CCSDS, SOIS services, JAXA, T. Yamada

• SpW and SOIS services–Overview, UoD S. Parkes
• Synthesis and applicability of previous activities (e.g. TCONS and OBL)
• SpW Networks specific features

• SpW Implementation of SOIS SubNet Services assessment, ESA/ESTEC, D. Jameux

Day 2: Friday 27^th of April – 09:00 – 13:00 - Room Fresnel 1

• SOIS Services and SpaceWire Features, UoStPb Y. Sheynin
• PnP
• Configuration space standardization for SpaceWire Nodes and Switches
• Low-latency real-time signals and interrupts in the Services at the Application Support Layer and at the SOIS Sub-Network Layer (a problem statement)
• CCSDS SOIS Services Prototyping, Plans in SOIS Services Prototyping and Analysis:
• Time Distribution Services
• QoS Packet Services
• Simplex SpaceWire links operation mode

• Major outcomes and Way forward ESA/ESTEC C.Taylor

• General Assessment of CCSDS SOIS Services
• SpW WG Group Assessment of adequacy of Subnet services
• CCSDS WG planning
• Cooperation between CCSDS WG and SpW WG

SpaceWire Working Group – other issues

• RMAP Standardization, ECSS-E50-11, ESA/ESTEC M. Suess and E. Gonzalez Conde

• "Embedded network architectures for mobile devices", Nokia, M. Gillet and S. Balandin

• “Different uses of logical addresses: Implementation of bandwidth allocation schemes", ESA/ESTEC, A. Ferrer Florit

• RMAP implementation issues, Gaisler Research, S. Habinc

Day 2: Friday 27^th of April – PM 14:00 17:00 – InterAgency Meeting Room Cf106

Restricted to Agency members, in teleconf with NASA (G. Rakow, R. Schnurr)

• SOIS Services prototyping activities (Agency Undertakings and industrial support)

Registered participants: Registered Participants

Reference Documents:

Note: Latest versions of CCSDS SOIS Documents are available at: www.ccsds.org (and then clicking on the CWE Quick link), or directly at http://cwe.ccsds.org/sois

For reference, List of documents available on 01/04/2007

Green book:

· SOIS Informational Report, Green Book, CCSDS 850.0-G-0b, Draft February 2007

Draft Red Books – Application Layer Services

· SOIS Cmd & Data Acquisition Services

· SOIS Time Access Service

· SOIS File Services

· Message Transfer Service

· Device Enumeration Service

Draft Red Books – Sub-Network Layer Services

· SOIS Sub-Network Packet Service, Draft RB

· SOIS Sub-Network Memory Access Service, Draft RB

· SOIS Sub-Network Time Distribution Service, Draft RB

· SOIS Sub-Network Device Discovery Service, Draft RB

· SOIS Sub-Network Device Test Service, Draft RB

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ESA - ESTEC - Electrical Engineering Department - Data Systems Division - Ph. Armbruster 03/05/2007