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Synchronization of Digital Telecommunications Networks
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Stefano Bregni, Politecnico di Milano, Italy
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0471 61550 1
March 2002
Hardback
430pp
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Network synchronization deals with the distribution of time and frequency across a network of
clocks often spread over a wide geographical area. The goal is to align (i.e. synchronize) the
time and frequency scales of all clocks, by using the communication capacity of their
interconnecting links. Network synchronization plays a central role in digital
telecommunications as it determines the quality of most services offered by the network operator.
However, the importance of network synchronization is often underestimated and how to solve
quality-of-service degradation caused by synchronization difficulties can become problematical to
all but a synchronization engineer.
- Systematically covers a wide spectrum of both theoretical and practical topics Features a clear and profound description of synchronous and asynchronous digital multiplexing (PDH, SDH), jitter and timing aspects of SDH networks
- Expounds synchronization network principles and implementation issues, clock modelling, time and frequency measurement
- Presents recent advances in telecommunications clock characterization and measurement
If you are a system engineer, researcher, designer or postgraduate student searching for both the
basics and an insight into more advanced areas currently under discussion then you will find
Synchronization of Digital Telecommunications Networks an enlightening read. It will also prove
to be a valuable sourcebook for senior undergraduates and technical personnel in
telecommunications companies.
Contents:
- 1. Introduction Synchronization in Telecommunications Outline of the Book
- 2. Asynchronous and Synchronous Digital Multiplexing
- Basic Concepts
- The PCM Primary Multiplex
- Digital Multiplexing
- The Plesiochronous Digital Hierarchies (PDH)
- The Synchronous Digital Hierarchy (SDH) and SONET
- Asynchronous vs. Synchronous Multiplex Frame Structures
- 3. Timing Aspects in SDH Networks Causes of Jitter and Wander in a SDH Transmission Chain
- Synchronization Processes along a SDH Transmission Chain
- SDH Synchronizer and Desynchronizer
- SDH Pointer Processor
- The SDH Equipment Clock
- 4. Network Synchronization Architectures
- A Historical Perspective on Network Synchronization
- Network Synchronization Strategies
- Standard Architectures of Synchronization Network
- Synchronization Network Management
- Synchronization Network Performance Monitoring
- Synchronization Network Protection: Synchronization Status Messaging
- Examples of Synchronization Networks
- 5. Characterization and Modelling of Clocks
- Clocks and Timing Signals Timing Signal Model and Basic Quantities
- Basic Concepts of Quality of Clocks: Stability and Accuracy
- Autonomous Clocks
- Slave Clocks
- Frequency-Domain and Time-Domain Stability Characterization
- Clock Stability Characterization in the Frequency Domain
- Clock Stability Characterization in the Time Domain
- Common Types of Clock Noise
- Behaviour of the Time-Domain Stability Quantities: Autonomous Clocks
- Behaviour of the Time-Domain Stability Quantities: Slave Clocks
- Chains of Slave Clocks
- 6. Physical Principles and Technology of Clocks
- Clocks
- Quartz-Crystal Oscillators
- Atomic Frequency Standards
- The Global Positioning System
- 7. Time and Frequency Measurement Techniques in Telecommunications
- Basic Concepts
- Instrumentation for Time and Frequency Measurement in Telecommunications
- Direct Digital Measurement
- Heterodyne Techniques: the Beat-Frequency Method
- Homodyne Techniques
- Multiple Conversion Techniques
- Clock Stability Measurement in Telecommunications
- Other Measurements on Equipment Clocks
- Network Measurements
- Glossary of Terms
- List of Main Symbols
- List of Acronyms
- Index
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