WONDER: A PON over a Folded Bus

Passive optical networks (PONs) represent a step forward in "first mile" networks; indeed, by using optical technologies, PONs can transfer a large amount of data, and by being completely passive, they reduce management costs and failure probabilities. Access network is logically a point-to-multipoint network and the tree topology emerged as the winning solution; however, it naturally lacks protection capability and requires local traffic to be processed by the optical line terminal. In this paper, we present WONDER, a novel PON architecture based on a folded bus topology, which offers fault resilience and efficient local traffic support, and we discuss WONDER strengths and weaknesses.