We present a constraint-based routing (CBR) approach for real-time operation considering both linear as well as nonlinear signal quality degrading effects in a heterogeneous network infrastructure. Different novel routing algorithms are assessed regarding their blocking probabilities. Furthermore, regenerator pools are placed at a limited number of nodes selected by a heuristic algorithm taking into account the physical impairments. It is shown that CBR together with intelligent regenerator placement can decrease the blocking probability significantly.
© 2008 Optical Society of America
Original Manuscript: December 11, 2007
Revised Manuscript: February 18, 2008
Manuscript Accepted: February 22, 2008
Published: March 31, 2008
Stephan Pachnicke, Tom Paschenda, and Peter Krummrich, "Assessment of a constraint-based routing algorithm for translucent 10Gbits/s DWDM networks considering fiber nonlinearities," J. Opt. Netw. 7, 365-377 (2008)