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In this paper, offered and new broadband services for residential customers are considered in Passive Optical\ud Networks (PONs). The user bit rates together with QoS requirements are evaluated for the availability of the\ud services in the PONs, according to the number of users and the network bit rates deployed. Traffic forecast is\ud also estimated for the next future access services evolution and for the dimensioning of the optical access\ud networks, taking into account the required bit rates and the number of users involved.Peer ReviewedPostprint (published version

Abstract-We explore a new wavelength management for ultra-dense WDM-PONs with randomly distributed ONU wavelengths, controlled with limited thermal tunability. Static and dynamic wavelength assignment paradigms and heuristic assignment schemes for spectrum management are proposed, simulated and compared. ONU acceptances in activation processes and ONU availability ratios up to 99.99% are obtained in standard environmental conditions.

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