OLT design approach for resilient extended PON with OBS dynamic bandwidth allocation sharing the OLT optical resources

The scalable advanced dense access network architecture (SARDANA) is a proposal for the fiber-to-the- home (FTTH) future next-generation of access networks. It is based on a flexible Hybrid WDM/TDM architecture built with remote nodes (RNs) that connect PONs to a WDM ring, providing resiliency. The RNs have remotely pumped amplification permitting a long distance reach. The ONUs are colorless, seeded for uplink by the downstream light generated at the OLT. In this work, we propose a design for the optical line terminal (OLT) that shares its available optical resources, thus providing great traffic efficiency. The traffic is managed by a Dynamic Bandwidth Allocation protocol based on OBS that suits the employed modulation format.