Economical Analysis of NG-Optical Transport Network for Broadband Access

In this paper, we analyzed and compared different innovative architectural options relying on multi-layer convergence and applied them to a typical broadband metro network. The analysis compares the cost effectiveness of such architectures with present mode of operation based on a case study of a typical service provider in Asia Pacific. In the analysis, we performed multi-year, cross-layer network design for each architecture option based on such input as traffic demands, fiber topology, and protection requirement, and developed a detailed TCO model that accounts for both capital expenditures (CAPEX) and operational expenses (OPEX). The conclusion of this paper is that the introduction of carefully planed leading edge technologies such as 40G/100G, DWDM with integrated OTN, T/ROADM, tunable transponders, wavelength tracker for zero-touch management and lambda/port/sub-port level grooming bring substantial benefits both in terms of TCO and network availability. The key learning from the case study can help service providers develop cost-effective, simple and low-risk evolution strategies for future converged transport networks fro broadband metro access