The IP Multimedia Subsystem (IMS): Session Control and Other Network Operations

by Russell, Travis

• ISBN13: 9780071488532
• ISBN10: 0071488537
• Edition: 1st
• Format: Hardcover
• Copyright: 2008-01-07
• Publisher: McGraw-Hill Education

Summary

Build and maintain a converged multimedia network environmentSeamlessly merge the Internet with cellular and wireless networks using next-generation IMS technology and the comprehensive information contained in this authoritative resource. The IP Multimedia Subsystem: Session Control and Other Network Operations details the steps necessary to deliver Web-based content, VoIP, streaming multimedia, conference calls, and text messages across one integrated network. Learn how to transition to IMS architecture, communicate with legacy networks, control sessions using SIP, and connect subscribers to network services. In-depth coverage of the latest IMS security, business intelligence, customer care, and billing procedures is also included. Migrate legacy networks to IMS-based technology Use the Proxy, Interrogating, and Serving Call Session Control Functions Interface with TDM-based, wireless, wireline, and VoIP networks Handle private and public user identities, domain names, and URLs Establish SIP sessions and connect subscribers to network services Deploy reliable network, access, and user-level security Prevent eavesdropping, DoS, message tampering, and amplification exploits Track services rendered and charge subscribers using DIAMETER and CDRs

Author Biography

Travis Russell is a senior manager in the Communications Software Solutions Group at Tekelec. He holds numerous patents and is the author of several books including Signaling System #7.

Table of Contents

Foreword	p. ix
Acknowledgments	p. xi
Introduction	p. xiii
Architecture of the IMS	p. 1
IMS Concepts	p. 1
The Intelligent Network and Signaling System #7	p. 3
Entities in an IMS Core Network	p. 10
Call Session Control Function (CSCF)	p. 10
IMS Reference Points	p. 22
Moving from Legacy to Convergence	p. 27
Migrating the Backbone to an IP-Based Network	p. 28
Deploying VoIP as a Growth Strategy	p. 32
Deploying IMS	p. 33
Interworking Between the Legacy Network and IMS	p. 35
Migrating the OSS/BSS	p. 36
Interfacing to the IMS	p. 39
Circuit-Switched Domains (CS)	p. 40
Packet-Switched Domains (PS)	p. 48
VoIP Domain	p. 48
General Packet Radio Service (GPRS)	p. 51
UMTS and CDMA Domains	p. 52
From IMS to IMS	p. 54
Session Initiation Protocol (SIP)	p. 57
SIP Protocol Structure	p. 58
SIP Methods	p. 60
SIP Requests	p. 64
SIP Responses	p. 65
SIP Header Fields	p. 69
Session Description Protocol (SDP)	p. 83
Session Level Description	p. 84
Time Description	p. 84
Media Description	p. 84
Media Attribute Lines (a=)	p. 85
Addressing in the IMS	p. 87
Device Identity in the IMS	p. 89
SIP Identities in the IMS	p. 95
Domain Names and URIs	p. 96
User Identities	p. 99
Establishing a Session in the IMS	p. 105
Accessing the Network	p. 106
Locating the P-CSCF	p. 107
Registration in the IMS Using SIP	p. 109
Basic Session Registration	p. 112
Interworking with the PSTN	p. 118
Interworking with VoIP	p. 127
Establishing Sessions in the IMS Using SIP	p. 127
Basic Session Establishment	p. 128
Emergency Session Establishment	p. 134
Modifying SIP Sessions in the IMS	p. 135
Terminating SIP Sessions in the IMS	p. 136
Security Procedures in the IMS	p. 137
Security Threats in an IP Domain	p. 138
Eavesdropping	p. 139
Registration Hijacking	p. 139
Server Impersonation	p. 140
Message Body Tampering	p. 140
Session Teardown	p. 140
Denial-of-Service Attacks	p. 141
Amplification	p. 141
Securing the IMS	p. 142
Authentication & Authorization	p. 143
Confidentiality	p. 145
Denial of Service	p. 146
Integrity	p. 147
Privacy	p. 148
Non-Repudiation	p. 149
Access Security	p. 150
Encryption	p. 154
Authentication and Key Agreement	p. 155
Network Domain Security	p. 157
Online and Offline Charging in the IMS	p. 161
Introduction to Charging	p. 162
Charging Architecture	p. 162
User Profile	p. 171
Accounting with DIAMETER	p. 173
Charging in the IMS	p. 175
3GPP Documentation	p. 201
IMS-Related Documentation	p. 201
IETF IMS-Related Documentation	p. 206
Bibliography	p. 209
Index	p. 211
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