Passive optical network for long-reach scalable and resilient access

A future access network and its main innovations are presented. The Scalable Advanced Ring-based passive Dense Access Network Architecture” (Sardana) is able to provide one order-of-magnitude increase in performances with enhanced functionality. Key enabling innovations, like the hybrid ring/tree WDM/TDM-PON architecture, the enhanced MAC, the resilient remotely pumped remote node and the reflective ONU are described, as fundamental building blocks of the future network.