Synopses & Reviews
Cutting-edge xDSL: technology, standards, architecture, regulation, and its application.
- The state of the art in DSL technology, standards, and architecture
- ADSL, HDSL2, SHDSL, VDSL, line unbundling, spectrum management, and more
- Voice over DSL and video-on-demand: technical progress and its impact on services
- DSL in the home: automating deployment, enhancing security, maximizing revenue
- Improved coding techniques, multi-user detection, and other new advances
Digital Subscriber Lines (DSLs) have transformed millions of ordinary phone lines into broadband arteries that link homes and businesses to the Internet at megabit speeds. DSL Advances brings together the state of the art in DSL technology and architecture for every technical professional and manager. The authors of the classic Understanding Digital Subscriber Line Technology review the key challenges service providers and equipment manufacturers face now, preview tomorrow's most important standards and technical enhancements, and offer new insights into today's regulatory and business environment. Coverage includes:
- HDSL2 and SHDSL: The next generation of symmetric DSL technology
- Recent developments in ADSL and standards for line unbundling
- Spectrum management standards: "traffic cops" for crosstalk management
- Voice over DSL and video-on-demand: technical progress that enhances the business case
- DSL networked homes: wired/wireless LANs, shared phone and AC wiring?including both centralized splitters and distributed in-line filter premises wiring
- Streamlining deployment: CPE auto-configuration and flow-through service provisioning
- Security risks and essential safeguards for vendors, service providers, and users
- Future directions, including advanced coding techniques and multi-user detection
Comprehensive coverage of physical-layer and upper-layer aspects are a unique feature of this book. It covers the latest in both U.S. and international standards. Experts who helped to write the DSL standards describe the many advances in DSL technology and applications since the writing of their bestselling "Understanding Digital Subscriber Line Technology."
DSL Advances brings together the state of the art in xDSL technology, architecture, standards, and business cases for every technical professional and manager. The authors of the classic Understanding Digital Subscriber Line Technology review important technical progress made since DSL moved into the mainstream and preview enhancements still on the horizon. Coverage includes ADSL, HDSL2, SHDSL, line unbundling, spectrum management, VoDSL, video-on-demand, DSL in the networked home, CPE auto-configuration, flow-through service provisioning, security, advanced coding techniques, multi-user detection, and much more.
About the Author
THOMAS STARR, Sr. Member of Technical Staff at SBC Technology Resources Inc., is responsible for development and standardization of xDSL and other new local access technologies for SBC's network. He serves as vice-chair of the T1E1.4 DSL standards working group and vice-chair of the DSL Forum.
MASSIMO SORBARA, engineer at GlobespanVirata, is Chair of the T1E1.4 Digital Subscriber Loop Access subcommittee.
JOHN M. CIOFFI, Professor of Electrical Engineering at Stanford, holds over 40 patents, including basic patents on DMT, VDSL, and V-OFDM. He spent seven years at Bell Laboratories and three years at IBM, and now advises many leading communications and investment firms.
PETER SILVERMAN has represented the DSL Forum's interests to other standards bodies and was its principal architect for CPE management and auto configuration. Starr, Cioffi, and Silverman co-authored Understanding Digital Subscriber Line Technology (Prentice Hall PTR).
Table of Contents
1. Introduction to DSL.
The Telephone Loop Plant. DSL Reference Model. The Family of DSL Technologies. DSL Protocol Reference Model.
2. Review of Transmission Fundamentals for DSLs.
Introduction. Baseband Transmission. Passband Transmission. Equalization. Discrete Multichannel Transmission (DMT). Impairment Modeling. References.
Basic Performance Enhancement. Coding. Swapping and Advanced Swapping/Loading Methods. RF Issues. The Analog Front End (AFE). Other Wiring Issues. All-Digital Loop. ADSL2 Summary. References.
4. Second-Generation HDSL (HDSL2).
Review of First-Generation HDSL. Second-Generation HDSL (HDSL2). Initialization. SHDSL and HDSL4. References.
5. Handshake for the ITU-T Suite of DSL Systems.
Handshake Modulation Method. Messages and Commands. G.hs Frame Structure. Information Field Structure. Parameter Data Structure. Transmission Order of the Parameters. Identification (I) Field. Standard Information (S) Field. Nonstandard Information (NS) Field. Message Composition. Transaction Types. G.hs Start-up/Clear-down Procedures. References.
6. Single-Pair High-Speed Digital Subscriber Line (SHDSL).
Applications of SHDSL. Standards for Multirate SHDSL. System Functional Reference Model. HDSL4. SHDSL Transceiver Operations. SHDSL Performance. Core SHDSL Framer (PMS-TC). Timing Configurations. Application Specific Framing (TPS-TC). Initialization. References.
Basic VDSL Concepts. Applications and Their Interfaces. DMT Physical Layer Standard. Multiple-QAM Approaches and Standards. Ethernet in the First Mile (EFM). References.
8. Unbundling and Line Sharing.
Overview. U.S. Regulatory Process. Unbundling. Line Sharing. Unbundling and DLC-Fed Lines. Unbundling and Network Operations.
9. Spectral Compatibility of DSL Systems
The Loop Plant Environment. Crosstalk in the Loop Plant. NEXT vs. FEXT. The "Primary" DSL Signal Spectra. Computation of Spectral Compatibility. Spectral Compatibility of the DSL Systems. Summary. References.
10. Spectrum Management of DSL Systems.
Spectrum Management Background. The Concept of Spectrum Management. The Basis Systems. Spectral Compatibility via Method of Signal Power Limitations (Method A). Foundation for Determining Acceptable Levels for Spectral Compatibility. The Spectrum Management Classes. Technology Specific Guidelines. Analytical Method (Method B). References.
11. Dynamic Spectrum Management (DSM).
DSL Unbundling Evolution. Multiuser Basics. Spectral Balancing (Iterative Water-filling). Vectoring. MIMO Channel Identification. Predictions for the DSL Age. References. Appendix 11A-Multiuser Detection.
12. Customer Premises Networking.
Home Network Media. Inside Telephone Wiring and ADSL. Inside Telephone Wire-Based Home Networks. Coax Cable-Based Home Networks. AC Power Wiring-Based Home Networks. Dedicated Data Home Networks. Radio LAN Home Networks. Infrared Home Networks.
13. DSL CPE Autoconfiguration.
An Overview of the Problem of DSL Customer Premises Equipment (CPE) Management and Configuration. Relationship between the Stack, the Network, and CPE Configuration. Standards for Autoconfiguration of DSL CPE. The DSL Forum Framework for Autoconfiguration. References.
14. Network Aspects.
Evaluation of Protocol Stacks for DSL. ATM-based Environments. Ethernet Directly over DSL. References.
15. DSL and Security.
General Security Issues for Broadband Services. DSL-Specific Security Advantages.
16. Voice-over DSL (VoDSL).
The History of DSL and Telephony. What is Voice-over DSL? Telephony and Its Rapid Evolution. VoDSL Architectures. The Appeal of Voice-over DSL. Service Models by Carriers. Standards Efforts for VoDSL. References.
ITU. Committee T1. ETSI. DSL Forum. ATM Forum. Broadband Content Delivery Forum. TeleManagemnt Forum. DAVIC. IETF. EIA/TIA. IEEE. The Value of Standards and Participation in their Development. The Standards Process.
Appendix A. Overview of Telco Operations Support Systems.
Appendix B. A Photographic Tour of the Telephone Company Network.