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|Author(s):||Marc A. Weiss;|
|Title:||Foreword to Book entitled Synchronous Ethernet and IEEE-1588 in Telecoms Sub Title: Next generation synchronization networks|
|Published:||June 01, 2013|
|Abstract:||Network synchronization or timing, as it is sometimes called, has always been an important subject since the advent of digital switching and transmission based around Time Division Multiplexing (TDM) technology. Synchronization is a fundamental foundation for many applications over the digital network, and in fact quality of service of many services transported is directly affected by synchronization performance. However, synchronization as a subject is often misunderstood. This has become even more complicated with the wide scale introduction of packet technology into the evolving Next Generation Network (NGN). This book aims to address the needs of engineers and technical managers who are struggling with the subject of synchronization and provide an engineering reference (or at least an informative starting point) for those that need to consider the NGN and synchronization. With the advent of packet technology and its push into the wider transport and switching landscape, it would be expected that network synchronization is no longer of any importance and thus the requirement would decline. Ethernet switches and IP/MPLS routers do not need synchronization to operate and the user applications in general would not either. Nevertheless, the world is not that simple; many technologies, especially those that use radio spectrum do need precise synchronization. Key examples where this is required are the 2G, 3G and 4G wireless technologies that are critical for supporting mobile voice and data services. Many solutions have been developed in order to transport synchronization information to these applications resulting in changes to the underlying transport technology. Two key technology developments in this area over the last decade are Synchronous Ethernet and Precision Time Protocol version 2 (PTPv2) from IEEE Std 1588-2008. Furthermore, the network is evolving. Networks are very rarely set up as a green field (total new) operation. Existing networks are often|
|Citation:||Synchronous Ethernet and IEEE-1588 in Telecoms|
|Publisher:||ISTE UK, London, CO|
|Pages:||pp. xi - xiv|
|Keywords:||Frequency synchronization,syntonization,time synchronization|