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ETR 137 TECHNICAL July 1995 REPORT ETSI ETR 137 TECHNICAL July 1995 REPORT Source: ETSI TC-NA Reference: DTR/NA-061101 ICS: 33.080 Key words: IN, service Intelligent Network (IN); Service and service feature interaction service creation, service management and service execution aspects ETSI European Telecommunications Standards Institute ETSI Secretariat Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: [email protected] Tel.: +33 92 94 42 00 - Fax: +33 93 65 47 16 Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. New presentation - see History box © European Telecommunications Standards Institute 1995. All rights reserved. Page 2 ETR 137: July 1995 Whilst every care has been taken in the preparation and publication of this document, errors in content, typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to "ETSI Editing and Committee Support Dept." at the address shown on the title page. Page 3 ETR 137: July 1995 Contents Foreword .......................................................................................................................................................7 1 Scope ..................................................................................................................................................9 2 References........................................................................................................................................10 3 Definitions..........................................................................................................................................11 4 Abbreviations.....................................................................................................................................13 5 The service and feature interaction problem.....................................................................................14 5.1 General introduction...........................................................................................................14 5.2 Situations of interworking between services......................................................................14 5.2.1 Two services involved ...................................................................................14 5.2.2 More than two services involved ...................................................................14 5.3 A thesaurus of examples ...................................................................................................15 6 View from the service plane ..............................................................................................................15 6.1 A solution: which one? .......................................................................................................15 6.1.1 A non-deterministic problem .........................................................................15 6.1.2 Goals of a feature..........................................................................................15 6.1.3 Service provider's choices.............................................................................15 6.1.4 Customer's choices.......................................................................................16 6.2 A solution: when?...............................................................................................................16 6.2.1 Interaction life cycle.......................................................................................16 6.2.2 Comparison between interaction life cycle and disease life cycle.................17 6.2.3 The phases of the interaction life cycle .........................................................18 6.2.3.1 Interaction "wild life cycle"....................................................18 6.2.3.1.1 Interaction germination .........................19 6.2.3.1.2 Interaction manifestation.......................19 6.2.3.2 Interaction research.............................................................19 6.2.3.2.1 Interaction spotting................................20 6.2.3.2.2 Interaction handling study .....................21 6.2.3.2.3 Interaction avoidance............................21 6.2.3.3 Curative handling.................................................................21 6.2.3.3.1 Interaction watching..............................21 6.2.3.3.2 Interaction care .....................................21 6.2.3.4 Preventive handling .............................................................21 6.2.3.4.1 Interaction tracking ...............................21 6.2.3.4.2 Interaction treatment.............................22 6.2.3.5 Some semantic precision ....................................................22 6.3 A solution: how?.................................................................................................................22 6.3.1 Towards an integrated solution .....................................................................22 6.3.2 Spotting in the SCE .......................................................................................23 6.3.3 The resolution techniques .............................................................................23 6.3.3.1 Avoiding interaction .............................................................23 6.3.3.2 Tracking interaction germination .........................................23 6.3.3.3 Watching interaction manifestation .....................................24 6.3.3.4 Recapitulation of the possible scenarios .............................25 6.3.3.5 Automating and standardizing interaction management .....27 6.4 Spotting in the SCE............................................................................................................28 6.4.1 Two kinds of approaches ..............................................................................28 6.4.2 Formal approach ...........................................................................................28 6.4.3 Heuristic approach ........................................................................................28 6.4.3.1 Phases of service life cycle to be examined........................29 6.4.3.2 Combinative state/transition examination............................29 6.4.3.3 Services invocation order ....................................................29 Page 4 ETR 137: July 1995 6.4.3.4 Interaction of a service with itself ........................................ 30 6.4.3.5 Interaction of services pertaining to several users.............. 30 6.4.3.6 Rules applying to data......................................................... 30 6.4.3.6.1 Service Information Model (SIM) and Global Information Model (GIM)........... 30 6.4.3.6.2 Rules to access a shared database..... 30 6.4.3.6.3 Data associated to the service life cycle ..................................................... 31 6.4.3.7 Rules applying to service behaviour ................................... 32 6.4.3.7.1 General principles ................................ 32 6.4.3.7.2 Example of possible rules .................... 32 6.4.3.7.3 Outcome of the rules............................ 33 6.4.4 Result of the automated spotting phase ....................................................... 33 7 View from the Global Functional Plane (GFP).................................................................................. 34 7.1 Interaction between Service Independent building Blocks (SIBs)..................................... 34 7.2 Interaction handling methods in the SIB definition phase ................................................. 34 8 View from the DFP............................................................................................................................ 35 8.1 Concept of interaction manager ........................................................................................ 35 8.1.1 Separation of service action from service interaction ................................... 35 8.1.2 SCF and SSF oriented approaches.............................................................. 36 8.1.3 Service interaction typology .......................................................................... 36 8.1.3.1 Two chronological situations............................................... 36 8.1.3.2 Overall call model................................................................ 36 8.1.3.3 Local interaction.................................................................. 37 8.1.3.4 Distributed interaction ......................................................... 38 8.1.3.5 Distributed interaction involving two BCPs within the same SSF ........................................................................... 39 8.1.3.6 Complex interaction ............................................................ 39 8.2 Interaction management mechanisms in the DFP............................................................ 40 8.2.1 Co-ordinating interaction manager ............................................................... 40 8.2.2 Concept of negotiation of interaction ............................................................ 40 8.2.3 Communication between interaction managers ........................................... 41 8.2.3.1 Need for additional data to be conveyed between managers ............................................................................ 41 8.2.3.2 Identification of services
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