Communication networks are often partitioned into tiers to provide a convenient framework for their optimization, graceful growth, and evolution. We extend the application of the Network Global Expectation model, which we have recently described, by considering a two-tier architecture for a communication network and analyzing the corresponding network requirements and costs using expectation values evaluated over the entire network. We also explicitly treat nonuniform traffic in the form of population-dependent demand. The capability of the model is illustrated by demonstrating scenarios for which the two-tier architecture may be used to reduce the cost of an optical fiber backbone network relative to a single-tier solution.
© 2004 Optical Society of America
Original Manuscript: July 16, 2004
Revised Manuscript: July 15, 2004
Published: December 21, 2004
Steven Korotky, "Analysis and optimization of two-tier networks with application to optical transport backbones," J. Opt. Netw. 4, 45-63 (2005)