Effects of network node consolidation in optical access and aggregation networks on costs and power consumption

CAPEX and OPEX simulation study of cost-efficient protection mechanisms in passive optical networks

“…Especially because Next-Generation PONs (NGPONs) aim at covering larger distances, like Long Reach PONs (LR-PONs). Also, node consolidation [30] is an ongoing trend among operators aiming at covering larger distances by moving the OLT equipment further into the aggregation network. In these cases, protection at the distribution level may be cost-efficient if large distribution areas have to be considered in presence of business clients.…”

Fiber and wavelength open access in WDM and TWDM passive optical networks

“…The insertion loss of PoU and other components is given in Table 1. The reach penalty affects the degree of node consolidation, and consequently cost, which is evaluated as in [10]. Further, we measure the variance of these costs with the adoption level and the customer churn rate.…”

Dimensioning and Assessment of Protected Converged Optical Access Networks

“…Furthermore, node consolidation [8] is considered by operators in order to reduce the number of central offices and hence reduce OPEX, when using NGOA allowing longer reach and higher client count. Hence, the remaining CO (referred as Main Central Office (MCO)) are now able to serve much larger service areas and more customers, but at the cost of decreasing the connection availability due to the longer distances, and increasing the failure impact [9].…”