Photonic transport network architecture and OA&M technologiesto create large-scale robust networks

摘要

In order to realize a large-scale and robust photonic transportnnetwork, a network protection strategy and operation, administration,nand management (OA&M) realization scheme in wavelength divisionnmultiplexing optical path (WDM OP) transport networks has beenndeveloped. This paper discusses the networking (restoration/protection)nconcepts in each optical layer and proposes the most suitable networkingnstrategy. To develop the OA&M technique, the characteristicninformation format of each optical layer must be discerned. A networknnode interface (NNI) structure for the WDM OP transport network isnproposed. The proposed NNI is defined as the optical transport modulen(OTM). An OP signal format is defined as the optical transport unitn(OTU). Overhead information and schemes to transmit it are alsondiscussed