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What is Path Protection

Chapter 49
Encyclopedia of Internet Technologies and Applications
Path protection is a path based protection scheme, meaning each path has an edgedisjoint protection path associated with it. Protection is initiated by the source node of each path, and each path over the fault link will be rerouted through its own associated protection path. Therefore, path protection takes more protection time than link protection, and provides protection with fine granularity.
Published in Chapter:
Network Survivability in Optical Networks with IP Prospective
Hongsik Choi (Virginia Commonwealth University, USA) and Seung S. Yang (Virginia State University, USA)
Copyright: © 2008 |Pages: 7
DOI: 10.4018/978-1-59140-993-9.ch049
Abstract
Survivability is the ability of the network to withstand faults and attacks including equipment and link failures. The main goal of survivable network is to be able to perform fast recovering at as small cost as possible (i.e., using minimum resources). As wavelength routing network paves the way for network throughputs of possibly hundreds of Tb/s, network survivability assumes critical importance. A short network outage can lead to data losses of the order of several gigabits. Hence, protection, or dedicating spare resources in anticipation of faults, and rapid restoration of traffic upon detection of a fault are becoming increasingly important. In this paper, we will explore the state of the art in network survivability and corresponding network control issues.
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