World Class Standards WG8 Specification Guidelines TISPAN WG8 – 3GPP SA#5 Joint meeting Sophia Antipolis, May14 th - 15 th 2007 Source: Michael Geipl Deutsche Telekom AG

World Class Standards 2 Table of Contents  Motivation, Scope, Principles  Specification Methodology  Synergies with 3GPP SA#5 and ITU-T SG4  Status and Roadmap  Summary

World Class Standards 3 Motivation for WG8 Guidelines  In WG8's current NGN Management related work standard forming principles are being used implicitly.  Specification Guidelines are necessary to transform these implicitly existing principles to explicitly described principles.  WG8 Specification Guidelines should reflect and, if necessary, modify or unify explicit principles.  This means the basic driver and motivation for the evolution of WG8 Specification Guidelines are the currently running WG8 standardization activities in the area of NGN OSS.  The work on the Specification guidelines has an accompanying character to WG8's regular standard forming process.

World Class Standards 4 Scope of WG8 Guidelines (1)  The Guidelines put on record the WG8 internal way how to develop ideas to standards documents.  The basis of the Specification Guidelines document is a status- quo analysis of WG8's way to develop standards. Implicitly existing steps of WG8 standardization work Reflection, Consolidation and Transformation Identification & Clarification concerning their purpose Investigation, Analysis and Evaluation of current methods Explicit WG8 methodology steps Consistent WG8 internal Specification Guidelines Consideration of proved existing methodologies Documentation of the results in TR

World Class Standards 5 Scope of WG8 Guidelines (2)  The Guidelines document tracks how the WG8 specifications are currently produced, i.e. it describes the ongoing, and it will direct the future work.  The existing WG8 methodology will be compared with well- known existing methodologies (e.g. 3GPP IRP, ITU-T M.3020, TMF NGOSS).  Non-scope:  Guidance for other ETSI WGs or standardization bodies than TISPAN WG8,  Definition of a new standardization process in the sense of refining or formalizing the guidelines.

World Class Standards 6 Principles of WG8 Guidelines (1)  Three-step approach for the development of standards: Step 2: Technology Independent Modelling Step 3: Technology Dependent Modelling Step 1: Definition of Requirements Guidelines From an idea to a standard document: Informal definition of proceedings External Sources 3GPP SA5 ITU-T SG4 TMF NGOSS Internal Sources WG1: Services WG2: Architecture WG3: Protocols

World Class Standards 7 Principles of WG8 Guidelines (2)  Reuse of existing methodologies: Where it is possible, parts (e.g. templates) of existing methodologies (e.g. 3GPP IRP, ITU-T M.3020, TMF NGOSS) will be taken over (by reference or by copy), or adapted.  Objects of WG8 standardization: Specification of NGN OSS Service Interfaces.  Modelling Technologies: UML is the preferred modelling language.  ETSI Documentation of standards: Statements on document cardinality (single/multi-part), document type (TS), and sequential vs. concurrent elaboration of documents. Provider User NOSI

World Class Standards 8 WG8 Specification Methodology (1) GuidelinesFrom an idea to a standard document:Informal definition of proceedings Kind a: Generic Activities Contexts E.g. Subscription management, assurance, billing, fulfilment, NRM, … Kind b: Context Specific Activities

World Class Standards 9 WG8 Specification Methodology (2) Step 2a Technology Independent Modelling Formal Information Model (MIM) Reference models Step 3a Technology Dependent Modelling E.g. XML/WSDL, CORBA/IDL, SNMP, CMIP Step 1a Definition of Generic Requirements Requirements Scope and vision Architecture principles GuidelinesFrom an idea to a standard document:Informal definition of proceedings Contexts E.g. Subscription management, assurance, billing, fulfilment, NRM, … Step 2b Context specific information model Integration with the MIM Technology independent NOSI Step 3b Context specific and technology dependent models Context and tech. dep. NOSI Step 1b Context specific requirements Context specific scope NOSI

World Class Standards 10 Synergies with 3GPP and ITU-T (1)  Foundation:  ITU-T SG4 Q.9: Recommendation M Management Interface Specification Methodology (MISM).  3GPP SA5: TS , TS , TS Integration Reference Point (IRP) Concepts, Definitions, Templates, UML.  Enabler:  WG8 specifications follow a three-step-approach including basically the same phases as described in 3GPP and ITU-T.  WG8 intends to use as much as possible the results of the existing joint 3GPP/ITU-T work on specification methodology.

World Class Standards 11 Synergies with 3GPP and ITU-T (2)  Requirements phase:  WG8 has decided to use the new M.3020 Requirements template (Annex A).  WG8 evaluates the final version of the 3GPP/ITU-T Requirements template, and will give feedback on this issue if necessary.  Currently requirements will be derived from use cases in WG8. The final documentation of use cases is still under evaluation.  Already existing WG8 Requirements specifications or drafts (NRM, SuM) should be gradually updated to follow the new template.  New WG8 Requirements specifications must follow the new template.

World Class Standards 12 Synergies with 3GPP and ITU-T (3)  Technology-independent Information Model/Service phase:  WG8 aims at using the new 3GPP/ITU-T Information Service (IS) template (TS ) and UML notation for these purposes.  WG8 will provide feedback to the final version of the 3GPP/ITU-T IS template if necessary.  In the latest WG8 drafts of the SuM IM and NRM IS at least parts of this template have already been used.  Co-operation:  Participation in 3GPP/ITU-T audio conferences on methodology.  Feedback to issues and results of 3GPP/ITU-T methodology work.  Liaison statements.

World Class Standards 13 Status and Roadmap  Current status of WG8 Specification Guidelines document:  Table of Contents and Scope are agreed.  Contribution to the next TISPAN meeting: Proposal for further proceeding; Revised structure; Closer alignment with joint 3GPP/ITU-T work on specification methodology.  Further roadmap:  Draft available: September 2007  WG approval: December 2007  Publication: March 2008

World Class Standards 14 Summary  The WG8 Specification Guidelines describe the whole WG- internal way to develop NGN OSS Service Interface standards.  The guidelines are used to document the current proceeding of WG8 specification work, and to guide the future work.  The aim is not to invent a completely new methodology, but to use as much as possible already existing specification methodologies from well-known standardisation bodies.  First-class candidate is the joint activity of 3GPP SA5 and ITU-T SG4 on interface specification methodologies.  WG8 evaluates the results of joint 3GPP/ITU-T work with respect to use in its Specification Guidelines document.