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Architecture design and key technologies for hybrid TDM/WDM optical access networks

Hybrid TDM/WDM PON is a promising optical access network solution which taking advantages of both TDM-PON and WDM-PON, and suitable for near future deployment in pragmatic migration from current TDM-PONs to future WDM-PONs. In this paper, we review and compare five types of the representative hybrid TDM/WDM PON architectures: TDMA based hybrid PON, WDMA based hybrid PON, TDM over WDM hybrid PON, WDM over TDM hybrid PON, and SUCCESS hybrid PON. Several key issues and enabling technologies for deploying hybrid TDM/WDM PON, including wavelength assignment, media access control and wavelength management protocols, light sources, and protection, are also discussed in the paper.