Title :
Protection interoperability for WDM optical networks
Author :
Crochat, Olivier ; Boudec, Jean-Yves Le ; Gerstel, Ornan
Author_Institution :
Swiss Fed. Inst. of Technol., Lausanne, Switzerland
fDate :
6/1/2000 12:00:00 AM
Abstract :
The failure of a single optical link or node in a wavelength division multiplexing (WDM) network may cause the simultaneous failure of several optical channels. In some cases, this simultaneity may make it impossible for the higher level (SONET or IP) to restore service. This occurs when the higher level is not aware of the internal details of network design at the WDM level. We call this phenomenon “failure propagation.” We analyze three types of failure propagation, called “bottleneck,” “connectivity,” and “multiple groups.” Then we present a solution based on the definition of appropriate requirements at network design and a WDM channel placement algorithm, protection interoperability for WDM (PIW). Our method does not require the higher level to be aware of WDM internals, but still avoids the three types of failure propagation mentioned above. We finally show the result on various network examples
Keywords :
open systems; optical fibre networks; telecommunication network reliability; wavelength division multiplexing; PIW; WDM channel placement algorithm; WDM optical networks; bottleneck; connectivity; failure; failure propagation; internal details; multiple groups; network design; protection interoperability for WDM; wavelength division multiplexing network; Algorithm design and analysis; Bandwidth; Optical fiber communication; Optical fiber networks; Optical propagation; Protection; SONET; Synchronous digital hierarchy; WDM networks; Wavelength division multiplexing;
Journal_Title :
Networking, IEEE/ACM Transactions on