Architecture of transport networks the functional modeling approach

Abstract

Transport networking has steadily grown more complex as a consequence of more sophisticated customer needs, the convergence of data and transport networking, and conditions imposed by external market and regulatory forces. In the evolution of embedded core transport infrastructures or in building new core transport networks, efficient cost-effective transport capacity expansion, network reliability, flexible and dynamic bandwidth management, and quality-assured service management are of paramount importance to service providers. Given the wide range of technology choices, there is a trend for networks to employ heterogeneous technology equipment. Whereas in the past, transport networks only supported plesiochronous digital hierarchy (PDH) equipment, current networks may utilize equipment employing various technologies, including SONET/SDH, DWDM/OTN, IP/MPLS, Ethernet, and ATM. © 2006 Springer Science+Business Media, LLC.