Demand for high-speed access for business and residential subscribers has grown
rapidly in recent years; thus, service providers need to offer cost-effective
solutions to cover this demand. Convergence within the same infrastructure for
clients requiring different service levels may have benefits in terms of cost, but
their respective service-level specifications need to be guaranteed. This article
compares different flavors of next-generation passive optical networks (PONs),
namely, gigabit PON (GPON), 10-gigabit PON (XG-PON), time and wavelength division
multiplexing PON (TWDM-PON), and wavelength division multiplexing PON (WDM-PON),
and evaluates which one can provide 1 Gb/s symmetrical service at the more
affordable cost when there is a mix of residential and business subscribers.
Results show that the recommended technology depends on the percentage of business
subscribers in the scenario.