DOCSLIB.ORG

The 3G IP Multimedia Subsystem (IMS) Merging the Internet and the Cellular Worlds

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
The 3G IP Multimedia Subsystem (IMS) Merging the Internet and the Cellular Worlds The 3G IP Multimedia Subsystem (IMS) Merging the Internet and the Cellular Worlds Second Edition Gonfalon Camarilla Ericsson, Finland Miguel A. Garcia-Martin Nokia Research Center, Finland John Wiley & Sons, Ltd Copyright © 2006 John Wiley & Sons Ltd, The Atrium, Southern Gate, Chichester, West Sussex PO19 8SQ, England Telephone (+44) 1243 779777 Email (for orders and customer service enquiries): [email protected] Visit our Home Page on www.wiley.com Reprinted with corrections May 2006 All Rights Reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, scanning or otherwise, except under the terms of the Copyright, Designs and Patents Act 1988 or under the terms of a licence issued by the Copyright Licensing Agency Ltd, 90 Tottenham Court Road, London WIT 4LP, UK, without the permission in writing of the Publisher. Requests to the Publisher should be addressed to the Permissions Department, John Wiley & Sons Ltd, The Atrium, Southern Gate, Chichester, West Sussex PO19 8SQ, England, or e-mailed to [email protected], or faxed to (+44) 1243 770620. Designations used by companies to distinguish their products are often claimed as trademarks. All brand names and product names used in this book are trade names, service marks, trademarks or registered trademarks of their respective owners. The Publisher is not associated with any product or vendor mentioned in this book. This publication is designed to provide accurate and authoritative information in regard to the subject matter covered. It is sold on the understanding that the Publisher is not engaged in rendering professional services. If professional advice or other expert assistance is required, the services of a competent professional should be sought. Other Wiley Editorial Offices John Wiley & Sons Inc., 111 River Street, Hoboken, NJ 07030, USA Jossey-Bass, 989 Market Street, San Francisco, CA 94103-1741, USA Wiley-VCH Verlag GmbH, Boschstr. 12, D-69469 Weinheim, Germany John Wiley & Sons Australia Ltd, 42 McDougall Street, Milton, Queensland 4064, Australia John Wiley & Sons (Asia) Pte Ltd, 2 Clementi Loop #02-01, Jin Xing Distripark, Singapore 129809 John Wiley & Sons Canada Ltd, 22 Worcester Road, Etobicoke, Ontario, Canada M9W 1L1 Wiley also publishes its books in a variety of electronic formats. Some content that appears in print may not be available in electronic books. Library of Congress Cataloging-in-Publication Data Camarillo, Gonzalo. The 3G IP multimedia subsystem (IMS) : merging the Internet and the cellular worlds / Gonzalo Camarillo, Miguel A. Garcia-Martin.-2nd ed. p. cm. Includes bibliographical references and index. ISBN-13: 978-0-470-01818-7 (cloth : alk. paper) ISBN-10: 0-470-01818-6 (cloth : alk. paper) 1. Wireless communication systems. 2. Mobile communication systems. 3. Multimedia communications. I. Garcia-Martin, Miguel A. II. Title. TK5103.2.C35 2OO6 621-384^C22 2005026863 British Library Cataloguing in Publication Data A catalogue record for this book is available from the British Library ISBN-13 978-0-470-01818-7 (HB) ISBN-10 0-470-01818-6 (HB) Typeset by Sunrise Setting Ltd, Torquay, Devon, UK. Printed and bound in Great Britain by Antony Rowe Ltd, Chippenham, Wiltshire. This book is printed on acid-free paper responsibly manufactured from sustainable forestry in which at least two trees are planted for each one used for paper production. To my parents, Anselmo and Isabel; my brothers, Alvaro, Daniel, and Ignacio; and Viviana. They all are a source of energy and motivation in everything I do. Gonzalo To my daughter Maria Elizabeth, who was born at the time I started writing this book, she is the sunshine of my life; my wife Jelena, who provided me with all the support and love I needed; my parents, Jose and Mari-Luz, my aunt Feli, my brother Javier Jose who, through the distance, encouraged and supported me during this project. Miguel Angel Contents Foreword by Stephen Hayes xvii Foreword by Allison Mankin and Jon Peterson xix About the Authors xxi Preface to the Second Edition xxiii Preface to the First Edition xxv Acknowledgements xxvii Part I Introduction to the IMS 1 1 IMS Vision: Where Do We Want to Go? 5 1.1 The Internet 5 1.2 The Cellular World 6 1.3 Why do we need the IMS? 6 1.4 Relation between IMS and non-IMS Services 8 2 The History of the IMS Standardization 9 2.1 Relations between IMS-related Standardization Bodies 9 2.2 Internet Engineering Task Force 10 2.2.1 Structure of the IETF 10 2.2.2 Working Group Operations 11 2.2.3 Types of RFCs 12 2.3 Third Generation Partnership Project 13 2.3.1 3GPP Structure 14 2.3.2 3GPP Deliverables 15 2.4 Third Generation Partnership Project 2 16 2.4.1 3GPP2 Structure 16 2.4.2 3GPP2 Deliverables 16 2.5 IETF-3GPP/3GPP2 Collaboration 17 2.5.1 Internet Area 18 2.5.2 Operations and Management Area 18 2.5.3 Transport Area 19 viii CONTENTS 2.6 Open Mobile Alliance 19 2.6.1 OMA Releases and Specifications 20 2.6.2 Relationship between OMA and 3GPP/3GPP2 21 2.6.3 Relationship between OMA and the IETF 22 3 General Principles of the IMS Architecture 23 3.1 From Circuit-switched to Packet-switched 23 3.1.1 GSM Circuit-switched 23 3.1.2 GSM Packet-switched 24 3.2 IMS Requirements 24 3.2.1 IP Multimedia Sessions 25 3.2.2 QoS 25 3.2.3 Interworking 26 3.2.4 Roaming 26 3.2.5 Service Control 26 3.2.6 Rapid Service Creation 27 3.2.7 Multiple Access 27 3.3 Overview of Protocols used in the IMS 27 3.3.1 Session Control Protocol 27 3.3.2 The AAA Protocol 28 3.3.3 Other Protocols 29 3.4 Overview of IMS Architecture 29 3.4.1 The Databases: the HSS and the SLF 30 3.4.2 TheCSCF 31 3.4.3 The AS 33 3.4.4 TheMRF 35 3.4.5 TheBGCF 35 3.4.6 The IMS-ALG and the TrGW 35 3.4.7 The PSTN/CS Gateway 36 3.4.8 Home and Visited Networks 38 3.5 Identification in the IMS 39 3.5.1 Public User Identities 40 3.5.2 Private User Identities 40 3.5.3 The Relation between Public and Private User Identities 41 3.5.4 Public Service Identities 42 3.6 SIM, USIM, and ISIM in 3GPP 42 3.6.1 SIM 43 3.6.2 USIM 43 3.6.3 ISIM 45 Part II The Signaling Plane in the IMS 47 4 Session Control on the Internet 51 4.1 SIP Functionality 51 4.1.1 Session Descriptions and SDP 51 4.1.2 The Offer/Answer Model 52 4.1.3 SIP and SIPS URIs 53 4.1.4 User Location 54 CONTENTS ix 4.2 SIP Entities 55 4.2.1 Forking Proxies 57 4.2.2 Redirect Servers 58 4.3 Message Format 59 4.4 The Start Line in SIP Responses: the Status Line 59 4.5 The Start Line in SIP Requests: the Request Line 60 4.6 HeaderFields 60 4.7 Message Body 62 4.8 SIP Transactions 63 4.9 Message Flow for Session Establishment 64 4.10 SIP Dialogs 67 4.10.1 Record-Route, Route, and Contact HeaderFields 70 4.11 Extending SIP 70 4.11.1 New Methods 72 4.12 Caller Preferences and User Agent Capabilities 72 4.13 Reliability of Provisional Responses 73 4.14 Preconditions 76 4.15 Event Notification 77 4.15.1 High Notification Rates 79 4.16 Signaling Compression 80 4.16.1 SigComp Extended Operations 81 4.16.2 Static SIP/SDP Dictionary 82 4.17 Content Indirection 82 4.18 The REFER Method 85 5 Session Control in the IMS 87 5.1 Prerequisites for Operation in the IMS 88 5.2 IPv4 and IPv6 in the IMS 89 5.3 IP Connectivity Access Network 90 5.4 P-CSCF Discovery 91 5.5 IMS-level Registration 93 5.5.1 IMS Registration with an ISIM 93 5.5.2 IMS Registration with a USIM 101 5.6 Subscription to the reg Event State 106 5.7 Basic Session Setup 109 5.7.1 The IMS Terminal Sends an INVITE Request 113 5.7.2 The Originating P-CSCF Processes the INVITE Request 120 5.7.3 The Originating S-CSCF Processes the INVITE Request 121 5.7.4 The Terminating I-CSCF Processes the INVITE Request 125 5.7.5 The Terminating S-CSCF Processes the INVITE Request 126 5.7.6 The Terminating P-CSCF Processes the INVITE Request 129 5.7.7 The Callee's Terminal Processes the INVITE Request 129 5.7.8 Processing the 183 Response 133 5.7.9 The Caller's IMS Terminal Processes the 183 Response 133 5.7.10 The Callee's IMS Terminal Processes the PRACK request 134 5.7.11 Alerting the Callee 137 x CONTENTS 5.8 Application Servers: Providing Services to Users 142 5.8.1 Generalities about Application Servers 142 5.8.2 Types of Application Servers 143 5.8.3 The Session Setup Model through Application Servers 147 5.8.4 Filter Criteria 155 5.8.5 An Example of Service Execution 159 5.9 Interworking 162 5.9.1 SIP-PSTN Interworking 162 5.9.2 Interworking with Non-IMS SIP-based Networks 165 5.10 Emergency Sessions 169 6 AAA on the Internet 171 6.1 Authentication, Authorization, and Accounting 171 6.2 AAA Framework on the Internet 171 6.3 The Diameter Protocol 173 6.3.1 Diameter Sessions 174 6.3.2 The Format of a Diameter Message 175 6.3.3 Attribute Value Pairs 176 6.3.4 The AAA and AAAS URIs 177 6.3.5 Diameter Base Protocol Commands 178 6.3.6 Diameter Base Protocol AVPs 180 7 AAA in the IMS 183 7.1 Authentication and Authorization in the IMS 183 7.2 The Cx and Dx Interfaces 183 7.2.1 Command Codes Defined in the Diameter Application for the Cx Interface 185 7.2.2 AVPs Defined in the Diameter Application for the Cx Interface .
Load more

Recommended publications
  • Wimax-UMTS Converging Architecture with IMS Signalling Analysis to Achieve Qos
    Available online at www.sciencedirect.com Procedia Technology 6 ( 2012 ) 16 – 23 2nd International Conference on Communication, Computing & Security [ICCCS-2012] WiMAX-UMTS Converging Architecture with IMS Signalling analysis to achieve QoS G.Vijayalakshmy a* and G. Sivaradje b a Perunthalaivar Kamarajar Institute of Engineering and Technology, Karaikal, Pondicherry University, India b Pondicherry Engineering College, Pondicherry University, Pondicherry,India Abstract The third-generation partnership project (3GPP) and 3GPP2 have standardized the IP multimedia subsystem (IMS) to provide ubiquitous and access network-independent IP-based services for next-generation networks via merging cellular networks and the Internet. The IEEE 802.16 worldwide interoperability for microwave access (WiMAX) promises to provide high data rate broadband wireless access services. The IP Multimedia Subsystem (IMS) seems to be the technology that will prevail in Next Generation Networks (NGN s), since the interworking environment and the service exibility that this technology offers to the currently deployed wireless broadband technologies makes it appealing to users, service developers and network operators. In this paper we propose a heterogeneous network model based on the IMS that integrates the Worldwide Interoperability for Microwave Access (WiMAX), Universal Mobile Telecommunications System (UMTS) and provides guaranteed QoS. In this paper, hybrid interworking architecture to integrate 3G (UMTS) and WiMAX networks with QoS is proposed. Moreover, IMS based signaling along with QoS algorithm was analyzed for UMTS and WiMAX interworking Architectures. QoS parameters such as Ethernet load and delay, IP Packet end to end delay, TCP delay, Active TCP connection count and TCP retransmission count, Email download response and upload response, Voice jitter, Voice packet delay variations and voice traffic received were analyzed © 20122012 The The Authors.
    [Show full text]
  • Design and Implementation of an IP Multimedia Subsystem (IMS) Emulator Using Virtualization Techniques
    Design and Implementation of an IP Multimedia Subsystem (IMS) Emulator Using Virtualization Techniques F. Ga lán 1,2, E. García2, C. Chávarri2, M. Gómez3, D. Fernández2 1: Centre Tecnològic de Telecomunicacions de Catalunya (CTTC) Av. Canal Olimpic, s/n - Castelldefels, Spain [email protected] 2: Departamento de Ingeniería de Sistemas Telemáticos (DIT) Universidad Politécnica de Madrid (UPM) Av. Complutense, s/n - Madrid, Spain {galan,egarcia,chavarri,david}@dit.upm.es 3: Agora Systems, S. A. Velázquez, 46 - Madrid, Spain [email protected] Abstract Multimedia service provisioning in Packet-Switched networks is one of the most active research and standardization efforts nowadays, and constitutes the most likely evolution of current telecommunication networks. In this environment, the 3GPP IP Multimedia Subsystem (IMS) represents the service provisioning platform of choice for SIP-based content delivery in mobile and fixed environments. However, in spite of the advanced status of research and specification in this field, few IMS-based services have been defined or deployed, mainly due to the fact that production or experimental IMS platforms are scarcely available for service validation and testing. This paper addresses the design and implementation through virtualization techniques of an IMS testbed intended for the functional validation of services, presenting the involved technologies, the undertaken implementation strategy, and the experiences and tests carried out in the first stages of its development. Keywords IP Multimedia Subsystem, virtualization, VNUML, IMS, 3GPP 1. Introduction Given the current trend in telecommunications industry towards data packet switching (the so called all-IP approach), the IP Multimedia Subsystem (IMS) plays a key role as service provisioning platform in Next Generation Networks.
    [Show full text]
  • Etsi Ts 123 228 V11.10.0 (2013-12)
    ETSI TS 123 228 V11.10.0 (2013-12) Technical Specification Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; IP Multimedia Subsystem (IMS); Stage 2 (3GPP TS 23.228 version 11.10.0 Release 11) 3GPP TS 23.228 version 11.10.0 Release 11 1 ETSI TS 123 228 V11.10.0 (2013-12) Reference RTS/TSGS-0223228vba0 Keywords GSM,LTE,UMTS ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N° 348 623 562 00017 - NAF 742 C Association à but non lucratif enregistrée à la Sous-Préfecture de Grasse (06) N° 7803/88 Important notice Individual copies of the present document can be downloaded from: http://www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at http://portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: http://portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be reproduced except as authorized by written permission.
    [Show full text]
  • Design of a Handset for the IP Multimedia Subsystem a Case Study
    Design of a Handset for the IP Multimedia Subsystem A Case Study James Sunil Selvam ITTIAM Systems [email protected] IMS Architecture OSA AS GSM SCF Application Layer OSA-SCS SIP AS IM-SSF Session Control CSCF Layer HSS GPRS, CDMA MGCF 802.11, DSL SIP Media Transport Layer Gateway EndPoint PSTN PTT, IM, VVoIP VoIP PTT, IM, VVoIP Hardware Block Diagram MIC LCD / Audio TOUCH Codec Speaker/ SCREEN Headphone GSM/ Keypad GPRS JTAG PROCESSOR WLAN Serial Board Control Flash/ Power SDRAM USB Reg TI Innovator Kit based on OMAP1510 Customised Hardware Based on OMAP™ Innovator Kit WLAN NOISE SUPRESSOR R O USB1 USB DWL-G122 T C TRANSCEIVER WLAN E 3.3V N N 5V O C GSM/ SIM E C GPRS CARD A F R E UART2 GM47 T LEVEL GSM/ N I SHIFTER GPRS R O T A MIC V O SPEAKER N N I POWER 2.75V (LEVEL SHIFTER) 5V POWER CONVERTERS 3.6V (GM47) Implementation Hardware Software Block Level SIP : oSIP Linux 2.6.16 RTP/RTCP : oRTP Circuit Design Audio Codec : Kernel Dep. G711, SPEEX, GSM Artwork Driver Management of SIM Test Programs Air Interface : GM47 TI Innovator Device + Custom Hardware Kernel Related Application Services VoIP : Linphone UA GUI Ergonomics Packaging ID Test Setup SIP Proxy & Registrar Ethernet Linphone UA Linphone UA IMS Handset Test Setup Integrated Product IMS Handset Design of a Handset for the IP Multimedia Subsystem - A Case Study James Selvam ITTIAM Systems (Pvt) Ltd Part 1: IMS Why IMS? • Internet – Ease of service creation & provision – Open protocols & large professional talent – Wealth of information • Cellular World – Service on the move
    [Show full text]
  • Security Services in IMS
    Security Services in IMS Lehrstuhl für UNIKASSEL Kommunikationstechnik VERSITÄT Prof. Dr.-Ing. Klaus David COMMUNICATIONS TECHNOLOGY (CT1) Report on Security Services in IMS (IP Multimedia Subsystem) By Hariharan, Priya - 24200190 Siddiqui Abbas Ali - 24200213 July 2005 1 Security Services in IMS CONTENTS 1. ABSTRACT................................................................................................................ 3 2. MARKET TRENDS IN COMMUNICATION.............................................................. 4 2.1 What Customer and Operator needs?? ..................................................................................................... 5 3. IP MULTIMEDIA SUBSYSTEM (IMS)....................................................................... 6 3.1 Motivation for IP Multimedia Subsystem (IMS)....................................................................................... 6 3.2 Definition of IP Multimedia Subsystem (IMS).......................................................................................... 6 3.3 The IMS - Overview................................................................................................................................. 6 4. SECURITY..................................................................................................................... 8 4.1 Need for Security...................................................................................................................................... 8 4.2 Security Services in IMS.........................................................................................................................
    [Show full text]
  • UMTS); Technical Specifications and Technical Reports for a UTRAN-Based 3GPP System (3GPP TS 21.101 Version 14.0.0 Release 14)
    ETSI TS 121 101 V14.0.0 (2017-03) TECHNICAL SPECIFICATION Universal Mobile Telecommunications System (UMTS); Technical Specifications and Technical Reports for a UTRAN-based 3GPP system (3GPP TS 21.101 version 14.0.0 Release 14) 3GPP TS 21.101 version 14.0.0 Release 14 1 ETSI TS 121 101 V14.0.0 (2017-03) Reference RTS/TSGS-0021101ve00 Keywords UMTS ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N° 348 623 562 00017 - NAF 742 C Association à but non lucratif enregistrée à la Sous-Préfecture de Grasse (06) N° 7803/88 Important notice The present document can be downloaded from: http://www.etsi.org/standards-search The present document may be made available in electronic versions and/or in print. The content of any electronic and/or print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx If you find errors in the present document, please send your comment to one of the following services: https://portal.etsi.org/People/CommiteeSupportStaff.aspx Copyright Notification No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm except as authorized by written permission of ETSI.
    [Show full text]
  • Parlay PAM in 3GPP's IP-Multimedia Subsystem
    Parlay PAM in 3GPP’s IP-Multimedia Subsystem Jens-Michael Klaus, Thomas Magedanz (klaus/magedanz)@fokus.fraunhofer.de TU-Berlin - Architektur der Vermittlungsknoten - http://www.av.tu-berlin.de/ Fraunhofer FOKUS - http://www.fokus.fraunhofer.de Abstract: The document will give a brief overview of the Presence and Availabil- ity -specification in general, protocols used in the IP Multimedia Subsystem - namely SIP and Diameter - and will show a possible mapping for PAM-methods to the under- lying infrastructure. In addition it will describe the IMS infrastructure developed at Fraunhofer Fokus and the implementation of the PAM-server Keywords: IMS , Parlay, Presence, Availability, UMTS, SIP, Diameter, service enabler 1 Introduction In todays telecommunication networks there are several ways of communicating between users. People have telephones at home, telephones at work, a mobile phone, emails and sometimes use instant messaging applications. When one tries to get in contact with some- body else the question asked is often how to reach someone. Presence and Availability Management (PAM) defines interfaces allowing 3rd party service providers to use this in- formation to create their services. Instead of being put into each service the necessary logic is put into the network itself. The network will then decide taking into account different criteria e.g. informatition from various networks such as GSM an Internet and user-preferences, whether a person is present as well as available to another person. Several examples exist for this kind of service: T-Mobile Germany offers instant messag- ing services allowing subscribers to chat with their friends via their mobile devices while Vodafone Germany offers a system called “Friend-Finder”.
    [Show full text]
  • (Ims) Architecture
    InSight: RIVIER ACADEMIC JOURNAL, VOLUME 4, NUMBER 1, SPRING 2008 AN OVERVIEW OF INTERNET PROTOCOL MULTIMEDIA SUBSYSTEMS (IMS) ARCHITECTURE Jhansi Jujjuru* Graduate Student, M.S. in Computer Science Program, Rivier College Keywords: IMS Architecture, Application Servers in IMS, IMS Protocols Abstract Internet Protocol Multimedia Subsystems (IMS) is an internationally standardized Next Generation Networking (NGN) architecture for telecom operators in order to provide mobile and fixed multimedia services. It uses Voice-over-IP (VoIP) implementation based on a 3GPP-standardised implementation of Session Initiation Protocol (SIP), and runs over the standard Internet Protocol (IP). It also specifies interoperability and roaming, and provides bearer control, charging and security. IMS is well integrated with existing voice and data networks, while adopting many of the key characteristics of the IT domain. This makes IMS a key enabler for fixed-mobile Convergence and value-based charging. IMS also supports existing Packet-Switched and Circuit–Switched phone systems. 1. Introduction Recently, web based multimedia services have gained popularity and have proven themselves to be viable of communication. This has inspired the telecommunication service providers and network operators to reinvent themselves to try and provide value added IP centric services. There was a need for a system, which would allow new services to be introduced rapidly with reduced capital expense (CAPEX) and operational expense (OPEX) through increased efficiency in network
    [Show full text]
  • Etsi Ts 123 228 V16.5.0 (2020-10)
    ETSI TS 123 228 V16.5.0 (2020-10) TECHNICAL SPECIFICATION Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; IP Multimedia Subsystem (IMS); Stage 2 (3GPP TS 23.228 version 16.5.0 Release 16) 3GPP TS 23.228 version 16.5.0 Release 16 1 ETSI TS 123 228 V16.5.0 (2020-10) Reference RTS/TSGS-0223228vg50 Keywords GSM,LTE,UMTS ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N° 348 623 562 00017 - NAF 742 C Association à but non lucratif enregistrée à la Sous-Préfecture de Grasse (06) N° 7803/88 Important notice The present document can be downloaded from: http://www.etsi.org/standards-search The present document may be made available in electronic versions and/or in print. The content of any electronic and/or print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI deliverable is the one made publicly available in PDF format at www.etsi.org/deliver. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx If you find errors in the present document, please send your comment to one of the following services: https://portal.etsi.org/People/CommiteeSupportStaff.aspx Copyright Notification No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm except as authorized by written permission of ETSI.
    [Show full text]
  • IMS: IP Multimedia Subsystem
    Content Forschungszentrum Telekommunikation Wien ! IMS Basics ! Standardization ! IMS Components and Interfaces ! IMS Services IMS ! Conclusion The IP Multimedia Subsystem Part 1: Peter Eichinger, Joachim Fabini © ftw. 2005 FTW IMS member tutorial IMS Fundamentals IMS Overlay Network Coverage ! What is IMS? - IP Multimedia Subsystem - Architectural framework AAA, Security - Overlay network for existing PS and CS networks Mobile access User Data Fixed access network network • Support for IP-based interactive multimedia (QoS) Mobile MM device • Mandatory support of IPV6 (Standard: IPV4 optional) • Signaling based on IETF-Protocols: SIP, Diameter, COPS MM Terminal 2 • Core and Access • Integration with PSTN IP core - Access agnostic MM Terminal 1 IMS • Wireless (UMTS, WLAN, WiMax) • Wired MM Server 1 MM Server 2 © ftw. 2005 FTW IMS member tutorial © ftw. 2005 FTW IMS member tutorial IMS Standardisation Why do we need IMS? (Santa Claus wish list) ! Involved parties ! Worldwide Interoperability required - Operators, Users, Content Providers, Legal Authorities, … - Metcalfe‘s law: "The usefulness, or utility, of a network ! All-IP network equals the square of the number of users.“ - Interactive Multimedia - QoS guarantee - Access transparency, seamless handover ! 3GPP (3rd Generation Partnership Protocol) - AAA - http://www.3gpp.org/ - Billing, Charging - TS (Technical specifications, TSpecs) ! Services and Service Aggregation - 3rd party Application Servers - 3GPP Release 4/5/6/7 - Services: No preferential treatement of voice - Voice (VoIP) is just one service, positioned at same level like ! IETF (Internet Engineering Task Force) any other services ! Communication security in IP networks - http://www.ietf.org/ - Signaling and Media - IETF Drafts, RFCs - Access and Core - Regulatory requirements (lawful interception, …) © ftw. 2005 FTW IMS member tutorial © ftw.
    [Show full text]
  • IP Multimedia Subsystem and Its Future Perspectives
    International Journal of Computing Academic Research (IJCAR) ISSN 2305-9184, Volume 5, Number 4 (August 2016), pp.187-194 © MEACSE Publications http://www.meacse.org/ijcar IP Multimedia Subsystem and Its Future Perspectives Orhan Orhan1, Cahit Bollu2, Mehmet Ulvi Agca3, Selcuk Keskin4 and Taskin Kocak5 1,2,3 Nokia, R&D Department, Yukari Dudullu 2. Cad. No:17/1, 34776 Umraniye Istanbul, Turkey 4,5 Bahcesehir University, Department of Computer Engineering, 34353 Besiktas Istanbul, Turkey Abstract The 3GPP IP Multimedia Subsystem (IMS) specified as the service delivery platform of 3G networks. Later this aim is updated by 3GPP, 3GPP2 and TISPAN for supporting networks such as WLAN, CDMA2000, fixed line, 4G and 5G networks. This paper explains IMS solution, virtualization of IMS, cloudification of IMS and its usage with 4G and 5G networks. Since the data traffic is increasing very fast, the management of voice network has become heavy and hard since it has too many network elements. Today's broadband technologies (such as LTE) are going to continue to evolve and will provide the backbone of the overall radio-access solution in the future. At that point, IMS relation with LTE, so called VoLTE, becomes much more important. VoLTE provides signaling framework to establish voice calls, media sessions and voice services over IP network. IMS base evolution on voice network as such in LTE will expand over 5G. Virtualization and cloudification of IMS network elements and functions also given in this work. Keywords: IP Multimedia Subsystem (IMS), 4G, Voice over LTE (VoLTE), 5G, Cloud Computing, Virtualization. Introduction Next Generation Networks (NGN) is name of the non-bounded architecture for delivering voice over IP (VoIP), through Session Initiation Protocol (SIP).
    [Show full text]
  • IP Multimedia Subsystem (IMS); Stage 2 (3GPP TS 23.228 Version 6.16.0 Release 6)
    ETSI TS 123 228 V6.16.0 (2007-03) Technical Specification Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); IP Multimedia Subsystem (IMS); Stage 2 (3GPP TS 23.228 version 6.16.0 Release 6) R GLOBAL SYSTEM FOR MOBILE COMMUNICATIONS 3GPP TS 23.228 version 6.16.0 Release 6 1 ETSI TS 123 228 V6.16.0 (2007-03) Reference RTS/TSGS-0223228v6g0 Keywords GSM, UMTS ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N° 348 623 562 00017 - NAF 742 C Association à but non lucratif enregistrée à la Sous-Préfecture de Grasse (06) N° 7803/88 Important notice Individual copies of the present document can be downloaded from: http://www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at http://portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: http://portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be reproduced except as authorized by written permission.
    [Show full text]