Signaling and Switching for Packet Telephony
1st Edition
Published on 1. January 2003
274 pages
978-1-58053-737-7 (ISBN)
Description
This must-have reference on packet switching and signaling offers you an in-depth understanding of the core packet switching architectures, signaling flows, and packet formats, as well as service delivery. It describes in detail the design principles for packet telephone switches and emphasizes the benefits of a distributed architecture and separating bearer and control. Successful carrier-grade deployments of packet telephony entail much more than simply stuffing voice samples into IP packets or ATM cells. They involve deploying multiple protocols, and this book gives you a solid understanding of all protocols used and a clear sense of where individual protocols fit in a packet-based system.
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Matthew Stafford
Signaling and Switching for Packet Telephony
Book
09/2004
Artech House Publishers
€104.18
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Content
- Signaling and Switching for Packet Telephony
- Contents
- Acknowledgments xiii
- Introduction 1
- 1.1 In the Beginning, There was Voice 1
- 1.2 Motivation: What Is the Case for Packet Telephony? 2
- 1.3 Switch Design 3
- 1.4 Motive and Opportunity for Carriers 5
- 1.5 What Are We Waiting For? 6
- 1.6 Motivation for this Book 7
- PART I: Switching Architectures for Packet Telephony: An Expository Description 9
- 2 Essentials of Next Generation Switching 11
- 2.1 Another Look at the Backhaul Example 12
- 2.2 Ability to Enter New Markets 13
- 2.3 Switch Components and Terminology 14
- 2.4 A Useful Abstraction 15
- 2.5 Defining the Fabric 16
- 3 Motivation for Packet Telephony Revisited 21
- 3.1 Separation of Bearer and Control 21
- 3.2 Packet Fabrics 26
- 4 Signaling and Services 31
- 4.1 The Control Plane 31
- 4.2 What Is a Service? 32
- 4.3 Where Do Services Live, and What Do They Entail? 33
- 4.4 Limitations of Circuit-Switched Networks 35
- PART II: Components of Packet Telephony: Technical Descriptions 37
- 5 Introduction to Part II 39
- 5.1 Selected Telco Terminology 40
- 6 Protocols 43
- 6.1 What Is a Protocol Stack? 43
- 6.2 Generic Layer Descriptions 44
- 6.3 Internet Protocol and Transmission Control Protocol 48
- 6.4 What Is a Finite State Machine? 53
- 6.5 Signaling System 7 in Brief 55
- 6.6 Summary 60
- References 61
- 7 A Closer Look at Internet Protocol 63
- 7.1 The IPv4 Header 64
- 7.2 The IPv6 Header 65
- 7.3 Addressing and Address Resolution 67
- 7.4 Security and AAA 69
- 7.5 Routing 71
- 7.6 Reachability Information 76
- 7.7 Quality of Service and Statistical Multiplexing 76
- 7.8 Layer 4 Protocols: Suitability to Task 81
- 7.9 Mobile IP 84
- 7.10 Summary 84
- References
- 8 A Closer Look at SS7 89
- 8.1 SS7 Architecture and Link Types 89
- 8.2 SS7 Routing and Addressing 91
- 8.3 Review of the SS7 Protocol Stack 92
- 8.4 Message Transfer Part 93
- 8.5 SCCP 95
- 8.6 TCAP 98
- 8.7 MAP 100
- 8.8 Summing Up 103
- References
- 9 The Bearer Plane 107
- 9.1 Voice Encoding 107
- 9.2 Bearer Interworking 111
- 9.3 Voice over IP 113
- References
- 10 Media Gateway Control and Other Softswitch Topics 119
- 10.1 Requirements 119
- 10.2 SDP in Brief 122
- 10.3 Megaco/H.248 123
- 10.4 MGCP 137
- 10.5 Interworking with Circuit-Switched Networks 142
- 10.6 Inhabiting the Bearer, Service, and Control Planes 143
- 10.7 Signaling Between Two Softswitches 143
- References
- 11 Session Control 145
- 11.1 "Generic" Session Control 145
- 11.2 The H.323 Protocol Suite 148
- 11.3 SIP Basics 152
- 11.4 SIP Functional Entities 155
- References
- 12 More on SIP and SDP 159
- 12.1 A Detailed SDP Example 159
- 12.2 A Detailed SIP Example 161
- 12.3 Forking of SIP Requests 168
- 12.4 SIP for Interswitch Signaling 168
- 12.5 Additional SIP Methods 170
- 12.6 Resource Reservation and SIP 171
- 12.7 SIP-T and Beyond 174
- 12.8 Authentication and Security 176
- 12.9 Further Reading 176
- References 177
- 13 Implementing Services 179
- 13.1 Introduction 179
- 13.2 SS7 Service Architectures: Intelligent Network 180
- 13.3 CAMEL and WIN 185
- 13.4 Parlay/OSA 185
- 13.5 JAIN 186
- 13.6 SIP and Services 186
- 13.7 SIP in Wireless Networks 190
- 13.8 Short Message Service 195
- 13.9 Further Reading 196
- References 197
- 14 Properties of Circuit-Switched Networks 199
- 14.1 Telco Routing and Traffic Engineering 199
- 14.2 Comparison with IP Routing and Dimensioning 205
- 14.3 Security 206
- 14.4 Quality of Service 206
- 14.5 Scalability 207
- 14.6 Survivability and Reliability 207
- 14.7 Billing Functionality 207
- 14.8 Emergency Service and other Government Mandates 208
- References 208
- 15 Evolving Toward Carrier-Grade Packet Voice: Recent and Ongoing Developments 209
- 15.1 QoS and Traffic Engineering in IP Networks 209
- 15.2 Service-Level Agreements and Policy Control 215
- 15.3 SDP and SDPng 216
- 15.4 Sigtran Adaptation Layers 216
- 15.5 Middlebox Traversal 217
- 15.6 Comments and Further Reading 219
- References
- 16 Conclusion 225
- APPENDIX A: Data Link Layer Protocols 227
- A.1 HDLC 227
- A.2 Frame Relay 227
- A.3 Asynchronous Transfer Mode 230
- A.4 Ethernet 236
- References 240
- About the Author 243
- Index
