Proposed Way Forward for Service-Oriented Architecture (SOA) in Space Missions
Proposed establishment of a Working Group by the CESG to develop a Service-Oriented Architecture (SOA) framework for space mission operations within the CCSDS. The focus includes identifying services, use cases, architecture definitions, and business cases to enhance CCSDS-wide interoperability and information model. The plan involves rapid identification, draft concept paper development, and parallel activity for SOA aspects in CCSDS alongside the Reference Architecture development.
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CSS Area Report -- Super BOF Background E-mail From A. Hooke to CESG: (CSS AD emphasis ) Date: Fri 02 Oct 2009 To: CESG cc: CMC Subject: Proposed way-forward for a "Service Oriented Architecture (SOA) for Space Missions." . . The IOAG also asks the CCSDS to study whether the current CCSDS work could be expanded to embrace the production of a Service Oriented Architecture (SOA) for Space Missions In response to the IOAG resolution, it is proposed that the CESG will convene a BOF at the October meeting with a view towards chartering a Working Group to create some kind of SOA for Space Mission Operations probably more of a SOA-like service architecture framework for CCSDS services on ground and in space. This would essentially be the top-level CCSDS framework for space mission operations into which all of the other CCSDS work would be referenced If acceptable to the CESG then the CSS Area Director should convene the BOF during the upcoming CCSDS meeting at ESTEC. It has been suggested that in view of the importance of this activity, the BOF should meet on the morning of Tuesday 27 October cesg-1
CSS Area Report -- Super BOF Meeting Summary SOA for Space was only hinted at; need for CCSDS Model, guidance information at CCSDS-wide level was the primary output of the BOF Goals for NEW WG as indicated at conclusion of Super-BOF: 1. Exhaustive list of services identifying cross-support services 2. Cross-Support & Interoperability Use cases / Operational scenarios, 3. overlap and gap analysis (identify redundant and missing services) 4. Business cases (based on existing and in-work services), 5. Architecture of existing and in-work services including an information model, 6. Abstract service definitions: rational for a service, content of service specifications, taxonomy 7. CCSDS Reference architecture. Identify impact on existing architecture. Discussed only briefly: Formation of SOA for Space WG really SOA for CCSDS to address all IT infrastructure issues at CCSDS level Produce recommendations on SOA for CCSDS Re-programming of existing WG How long will does it take to produce the recommendation(s) What do we do with current efforts? cesg-2
CSS Area Report -- Super BOF Plan of Attack BOF: Final Concept Paper 28 Feb 2010 CESG/CMC: Form BOF ASAP Nominees 07 Nov 09 BOF Ground Rules, Initiation 20 Nov 09 BOF: Rapid Identifications re Items 1 + 2 (List of Services) (List of Scenarios) 15 Dec 2009 CESG: Vote on Identifications Feedback to BOF 10 Jan 2010 BOF: Draft Concept Paper Points 3 7, WG approach, WG Deliverables Identification of Key Trades, fitting SOA to CCSDS 31 January 2010 CESG: Review Draft, Feedback to BOF 15 Feb 2009 Let s call this the CCSDS Reference Architecture BOF cesg-3
CSS Area Report -- Additional Recommendations (Post Super BOF) Initiate parallel activity (in addition to CCSDS Reference Architecture) with goal of producing concept paper for SOA aspect of CCSDS Focused exclusively on information infrastructure services Aligned with current industry SOA approach Identify deliverables relative to related CCSDS activities on information architecture, registries/SANA, directories Due date of 28 Feb 2010 (same as reference architecture BOF concept paper) CESG/CMC makes informed decision for WG initiation at Spring meetings Going forward Need to seriously consider that CCSDS reference architecture be visited in a structured formal manner at every CCSDS technical meetings (vs. MOUs) cesg-4
CSS Area Report -- Super BOF Conclusion Agreement that overall CCSDS technical framework (reference architecture) in much need of (re-)definition That SOA for CCSDS itself was not directly addressed (but suggested to draft two concept papers in parallel) Need to seriously consider that CCSDS framework be visited in a structured formal manner at every CCSDS technical meeting (CESG standing action) Concern: BOF members need both excellent domain knowledge and available time cesg-5
Systems Engineering Area Report D. Cross Area Meetings, contd Super BoF Reviewed visions of what a SOA for Space might be, as presented by CESG chair and MOIMS, SEA and CSS ADs Identified at least four different variants on how SOA for Space and Services were being interpreted across CCSDS Agreed to initiate a BoF to develop a charter for a CCSDS Reference Architecture (or Model) that would map all CCSDS services and their relationships (see CSS presentation for details) SEA view is that a Space Information Services Architecture (e.g. SOA for Space) is different than the CCSDS Reference Architecture: - Define a reference end-to-end space information service architecture for interoperability and cross support - Common framework and elements - Both flight and ground data system operations - Define standard components and services, including their specifications - Define secure deployment and federation models for information services - Define and leverage common methods for representing information models - Develop best practices for the design of standard data definitions, including XML schemas, data dictionaries, and common registries 04 November 2009 cesg-6
CESG General Issues/Concerns [3] (CESG Report CMC) CESG strongly advocates that CCSDS needs an overall reference architectural framework into which all of its work can be aligned in terms of services and standards, and that it also needs a consistent way to express how those services should be defined and specified. CESG recommends that the CMC should endorse the way forward proposal made by the CSS Area: Team-1: Services, Scenarios, Framework WG Formed May 09 WG Concept 28 Feb 10 Team-2: Service Definition Technology CESG notes that this activity is likely to need temporary redirection of resources from several information architecture-related activities in MOIMS and SEA, including SM&C Current work cannot totally stop Question of where eventual WG would be located? CESG Chair files a friend of court brief that as the major stakeholder in the outcome SM&C should be given this job cesg-7
