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Building on the Ethernet Passive Optical Network (EPON) and Gigabit PON (GPON) standards, Next-Generation (NG) PONs provide increased data rates, split ratios, wavelengths counts, and fiber lengths, as well as allow for all-optical integration of access and metro networks. This paper provides a comprehensive probabilistic analysis of the capacity (maximum mean packet throughput) and packet delay of subnetworks that can be used to form NG-PONs. The analysis can cover a wide range of NG-PONs through taking the minimum capacity of the subnetworks making up the NGPON and weighing the packet delays of the subnetworks. The numerical and simulation results indicate that the analysis quite accurately characterizes the throughput-delay performance of EPON/GPON tree networks, including networks upgraded with higher data rates and wavelength counts.
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