W. D. Ambrosch A. Maher B. Sasscer (Eds.) The Intelligent Network A Joint Study by Bell Atlantic, IBM and Siemens With 48 Figures Springer-Verlag Berlin Heidelberg New York London Paris Tokyo Wolf-Dietrich Ambrosch IBM Deutschland GmbH Pascalstrasse 100 D-7000 Stuttgart 80 Anthony Maher Siemens AG Wittelsbacher Platz D-8000 Munchen 1 Barry Sasscer Bell Atlantic International 1300 N., 17th Street, Suite 1510 Arlington, VA 22209, USA This document describes the results of a conceptual research study. This document does not commit Bell Atlantic International Inc., IBM Deutschland GmbH, or Siemens AG to the development of any product, service, requirements, or interconnection standard. This document should not be construed as a suggestion to any manufacturer to modify or change any of its products. Neither does this document commit Bell Atlantic, IBM, or Siemens to purchase any product or service. No claim, expressed or implied, is made by Bell Atlantic, IBM, or Siemens concerning the accuracy, completeness, or utility of the information contained herein, nor concerning the technical feasibility or economic viability of the concepts described herein. No representations of warranties, expressed or implied, are made with respect to the accuracy, completeness, or utility of the information set forth herein. Liability to anyone arising out of use or reliance upon any information set forth herein is expressly denied. Bell Atlantic, IBM and Siemens reserve the rights to independently revise the information contained herein. Nothing contained herein shall be construed as conferring by implication, estoppel or otherwise any license or right under any patent, whether or not the use of any information herein necessarily employs an invention of any existing or later issued patent. Bell Atlantic's participation in this study was confined to reviewing generic feature requirements for the Intelligent Network, describing pertinent features of Intelligent Network applications software, and surveying marketing opportunities for the Intelligent Network. This publication is not intended to constitute an endorsement by Bell Atlantic of the products or services of any person or company. ISBN-13: 978-3-540-50897-7 e-ISBN-13: 978-3-642-46663-2 DOl: 10.1007/978-3-642-46663-2 This work is subject to copyright. All rights are reserved, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, re-use of illustrations, recitation, broadcasting, reproduction on microfilms or in other ways, and storage in data banks. Duplication of this publication or parts thereof is only permitted under the provisions of the German Copyright Law of September 9, 1965, in its version of June 24, 1985, and a copyright fee must always be paid. Violations fall under the prosecution act of the German Copyright Law. © Springer-Verlag Berlin Heidelberg 1989 The use of registered names, trademarks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. 2145/3140-54321 - Printed on acid-free paper Preface This report examines the findings of a study by Bell Atlantic, IBM, and Siemens which investigated the role of the Intelligent Network in telecommunications. It considers current trends and future developments, on a national and international level. This report defines and describes the concept of the Intelligent Network and considers the operating requirements (including the hardware and software) and the types of service a network user can expect. Concepts, definitions, and terminology reflect the status of the Intelligent Network in 1988. Actual implementation may differ due to the constantly changing environment, new requirements, and experiences with existing solutions. The report is divided into six parts: Part 1 introduces the concept of the Intelligent Network, and describes elements common to alLIN services. It considers the application program and network management requirements, and provides examples of the hardware and software proposed for implementing the network. Parts 2 through 6 include detailed descriptions of specific IN services. In each part there is a functional service description and an application description. The reader is expected to have a general knowledge and understanding of existing telecommunication networks. A bibliography, glossary, and all appendices referred to in this report are contained in the back of the document. Contents Introduction ............................. 1 Part 1. Overview of the Intelligent Network 3 Chapter 1. The Intelligent Network .......... . 5 1.1 IN Architecture and Capabilities 5 1.1.1 IN Goals ................... . 6 1.1.2 IN Technical Overview .......................... 8 1.2 IN Definition ............................... 9 1.2.1 IN Elements ............................... . 9 1.2.2 An IN Service Example ........................ . 12 1.3 IN"User Programmability ....................... . 14 1.4 IN Introduction Scenarios ...................... . 15 1.4.1 The Model .............................. . 15 1.4.2 Introduction Scenarios ........ . ..... . 17 1.5 IN Architecture Validation .................... . 19 Chapter 2. Functional Characteristics Common to Selected IN Services ... . 22 2.1 Overview ................................. . 22 2.2 Methodology .............................. . 22 2.3 Summary of Findings ......................... . 23 2.4 Standards ................................ . 24 2.5 Service Interaction ........................... . 24 2.5.1 Service User ................ .. 24 2.5.2 Service Subscriber ............. . 25 2.5.3 SMS Access Instrument ..... . 25 2.5.4 Network Operator ........................... . 26 2.6 Billing ..................... . ........... . 27 2.6.1 SSP ......... . ................... . 27 2.6.2 SCP .................................... . 27 2.6.3 SMS ................................... . 27 2.7 Service. Logic .............................. . 28 2.8 Databases ................................ . 31 2.8.1 Size .................................... . 31 VIII Contents 2.8.2 Database Integrity Requirements 32 2.8.3 Location of Databases ... 32 2.8.4 Database Administration 33 2.9 Transaction Rate Estimates 34 2.9.1 Methodology ....... . 34 2.9.2 Transactions Between SMS and its Users 35 2.9.3 SMS-SCP Transaction Rates 35 2.9.4 SCP- SSP Transaction Rates 35 2.10 Measurement Requirements 36 2.10.1 SSP 36 2.10.2 SCP ............. . 38 2.10.3 SMS ............ . 39 2.11 Performance and Dynamic Requirements 39 2.11.1 Response Time ......... . 39 2.11.2 Response Times for IN Elements 40 2.11.3 Overload Handling ....... . 43 2.12 Availability Requirements and Objectives 44 2.13 National Considerations 45 2.14 Future Considerations ...... . 45 Chapter 3. Network and Service Management 47 3.1 Overview ...... . 47 3.2 Methodology 48 3.2.1 Summary of Findings 48 3.3 NSMS Requirements 49 3.3.1 NSMS Global Qualities 49 3.3.2 Basic Operations, Administration and Management Functions 49 3.3.3 Network Management Users ......... . 52 3.4 Switching Layer and the OSS--an Example ....... . 53 3.5 Signaling Network and the SEAS ............. . 54 3.5.1 Management Functions Related to the Signaling Network 54 3.6 IN-Services and the SMS ....... . 57 3.6.1 Service Management System Overview ......... . 58' 3.6.2 SMS Function Description ................ . 59 3.7 Administrative System Functions and IN Requirements 62 3.7.1 IN- Wide Service Management Examples 62 3.8 Trends ............... . 63 3.8.1 Evolving Operations Architecture 63 Chapter 4. Network Components ...... . 66 4.1 Main Objectives of the IN Architecture 66 4.2 Network Topology ........... . 66 4.2.1 Performance and Throughput Requirements 67 4.2.2 Availability Requirements 68 4.2.3 IN Architecture ...... . 69 4.3 Service Control Point (SCP) 73 Contents IX 4.3.1 Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 73 4.3.2 SCP Architecture ............................. 76 4.4 Signaling Transfer Point (STP) . . . . . . . . . . . . . . . . . . . .. 87 4.4.1 Functional STP Requirements ..................... 88 4.4.2 CCS7 Network Architecture and IN ................. 88 4.5 Service Switching Point (SSP) ..................... 94 4.6 Future Considerations .......................... 100 Part 2. Green Number Service 103 Chapter 5. GNS Service Description ...................... . 104 5.1 Overview ................................ . 104 5.2 Functional Description ....................... . 105 5.3 Standards ................................ . 107 5.4 Service Interaction ........................... . 107 5.5 Billing .................................. . 108 5.6 Service Logic .............................. . 109 5.6.1 Distribution ............................. . 109 5.6.2 Functional Flow ........................... . 109 5.7 Traffic Measurement Requirements ................ . 110 5.8 Dynamic Requirements and Performance . . . . . . . . . . . . 112 5.9 National Dependencies ......... . ......... . 112 5.10 Future Considerations ........................ . 113 Chapter 6. GNS Application Description ..................... . 114 6.1 Functional Requirements and Allocation ............. . 114 6.2 Functional Units in the EWSD SSP ............... . 117 6.3 Administrative Units in SSP 120 6.4 Functional Units in SCP 121 6.5 Administrative Units in SCP .................... . 129 Part 3. Alternate Billing Service 133 Chapter 7. ABS Service Description 134 7.1 Overview ........ . 134 7.2 Functional Description 135 7.3 Standards ....... . 137 7.4 Service Interaction ........... . . . . . . . . . . . . 137 7.5 Billing ................................ . 138 7.6 Service Logic ......................... . 139 7.6.1 Distribution .......................... . 139 7.6.2 Functional Flow ....................... . 140 7.7 Traffic Measurements Requirements ... 143 7.8 Dynamic Requirements and Performance 144 X Contents 7.9 National Dependencies 144 7.10 Future Considerations 144 Chapter 8. ADS Application Description ...................... 146 8.1 Functional Requirements and Allocation .............. 146 8.2 Functional Units in SSP ........................ 149 8.3 Administrative Units in SSP ...................... 152 8.4 Functional Units in SCP ....................... 153 8.5 Administrative Units in SCP ...................... 157 Part 4. Emergency Response Service .... 161 Chapter 9. ERS Service Description ........................ . 162 9.1 Overview ................................. . 162 9.2 Functional Description ........................ . 164 9.3 Standards ................................ . 166 9.4 Service Interaction ........................... . 167 9.5 Billing .............................. . 169 9.6 Service Logic .............................. . 169 9.6.1 Distribution .............................. . 169 9.6.2 Functional Flow ........................... . 170 9.7 Traffic Measurement Requirements ................ . 172 9.8 Dynamic Requirements and Performance ............ . 172 9.9 National Dependencies ...................... . 172 9.10 Future Considerations ....................... . 176 Chapter 10. ERS Application Description ....... . 178 10.1 Functional Requirements and Allocation 178 10.2 Functional Units·in SSP ......... . 181 10.3 Administrative Units in SSP 184 10.4 Functional Units in SCP ......... . 184 10.5 Administrative Units in SCP ......... . 194 Part 5. Private Virtual Network 199 Chapter 11. PVN Service Description ....................... . 200 11.1 Overview .............................. . 200 11.2 Functional Description ........................ . 202 11.3 Standards ................................ . 215 11.4 Service Interaction .. 216 11.5 Billing ..... . 217 11.6 Service Logic 218 11.6.1 Distribution 218 11.6.2 Functional Flow 221 Contents XI 11.7 Traffic Measurement Requirements .................. 226 11.8 Dynamic Requirements and Performance .............. 228 Chapter 12. PVN Application Description .................... . 230 12.1 Functional Requirements and Allocation ............. . 230 12.2 Functional Units in SSP ....................... . 241 12.3 Administrative Units in SSP 248 12.4 Functional Units in SCP 250 12.5 Administrative Units in SCP ..................... . 255 Part 6. Area Wide Centrex 257 Chapter 13. A WC Service Description ....................... . 258 13.1 Overview ................................. . 258 13.2 Functional Description ........................ . 259 13.3 Standards ................................ . 263 13.4 Service Interaction ........................... . 263 13.5 Billing .................................. . 265 13.6 Service Logic .............................. . 266 13.6.1 Distribution ............................... . 266 13.6.2 Functional Flow 267 13.7 Traffic Measurement Requirements ................. . 278 13.8 Dynamic Requirements and Performance ............. . 280 13.9 National Dependencies ........................ . 280 13.10 Future Considerations ......................... . 280 Appendix A. Supplementary Services 281 Appendix B. Bellcore Preliminary-Defined Functional Components and Requests ................. 283 Glossary ....................................... 285 Bibliography .................................... 293 List of Figures 1. Access Lines and Corporate Revenue, 19852 ...- -. . . . . . . . . . . . . .. 7 2. IN Components ...........................:..... 8 3. IN Elements .................................... lO 4. Non-IN GNS Service ....... :.......... . . . . . . . . . . . .. 12 5. IN-Based Green Number Service ....................... . 13 6. IN-Pay-Per-View ................................ . 20 7. Database Distribution ............................. . 33 8. STP Message Delay13 ............................. . 40 9. SCP Response Time of SMS Generic Messages ............. . 41 10. SCP Response Time for SSP Messages (Service Specific) ........ . 42 11. Operation Systems within the United States' Intelligent Network Operations .................................... . 50 12. Network User Categories ........................... . 51 13. Operations System Users ......... . ............ . 52 14. SEAS Control of CCS7 Network ...... . . . . . . . . . . . . . . 55 15. SMS Overview ................ . 58 16. Protocol Architecture in OA&M Networks 65 17. IN User-Interfaces 69 18. IN Components and their Related Interfaces ................ . 71 19. Basic Data Flow Between an SSP and SCP (for GNS Without Prompting Option) .................................. 72 20. SCP Major Components ....................... 77 21. SCP Software Components ..................... 80 22. General STP Architecture for the EWSD ............. 90 23. Possible IN CCS7 Architecture for the EWSD .......... 91 24. Architecture for the EWSD ..............- ............. 92 25. Common Channel Network Control for the EWSD 93 26. CPl13 Coordination Processor for the EWSD ........... 94 27. The Operating System ......................... 95 28. SSP Components ............................ 96 29. EWSD System Structure and Information and Message Flow for the GNS 99 30. GNS Functional Flow-GNS without Prompting Option ...... 111 31. Functional Flow of ABS with Collect Call, Third Party Billing, and Manual Calling Card Billing ....................... 141 32. Functional Flow of ABS with Automatic Calling Card Billing ...... 142