Abstract

Passive Optical Networks (PONs) constitute a predominant point-to-multipoint architectures for an efficient and cost-effective fiber-based broadband access. We have analyzed several PON configurations, which either have been already standardized, like Wavelength Division Multiplexing - Time Division Multiplexing (WDM-TDM) PONs, or are highly promising PON technologies, like Optical Code Division Multiple Access (OCDMA) PONs. Based on Markov chains, we have developed teletraffic loss models for the call-level performance evaluation in the upstream PON direction. The PONs accommodate multiple service-classes of bursty traffic; to reflect the bursty nature of traffic and to simplify the analysis, we resort to ON-OFF traffic modeling. Call-connection requests are considered random (infinite population of traffic sources) or quasi-random (finite population of traffic sources). The main call-level performance index is the Call Blocking Probability (CBP). For the efficient CBP calculation, we result in approximate recursive formulas, whose the accuracy is completely satisfactory, as it has been verified through simulation.

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