Infinera英飞朗DTN技术介绍.ppt

* * * * * * * * * * * The key insight for Infinera was that the difficulties with scaling the network and making it more flexibile and manageable have the same root problem. You want DIGITAL capabilities so your network is FLEXIBLE and MANAGEABLE, but all the parts required to be digital cause your scaling problem. Our approach is to keep these functions, but INTEGRATE onto a PIC so you can afford digital processing in the network. * * * * * * * * * * * * * * * * * * The inherent densification of optical transport functions enabled by Photonic Integrated Circuits allows system architecture and design to be greatly simplified compared to existing point-point WDM systems and architectures. The Infinera DTN is architected similarly to a SONET/SDH add/drop multiplexer (ADM), so that an end-end network can be easily deployed in a “plug play” fashion, and add/drop traffic only requires the addition of tributary cards at the entrance and exit points of the network. For example, assuming that an initial network deployment requires interconnection between two points, a DTN node is deployed at each end and an Infinera Optical Line Amplifier in between as required to span the optical distance between the nodes (in the case one OLA is assumed). By simply adding one BMM and one DLM card at each node, the network can be activated with 100Gb/s of DWDM capacity (that’s 10 x 10Gb/s channels!). Expanding the network to other nodes only requires the addition of addition DTNs at those sites, and equipping them with the required BMM and DLM circuit packs to provision capacity in increments of 100Gb/s of capacity, up to 400Gb/s (in Release 1.0). Very importantly, automated System Line-Up and Test (auto-SLAT) capabilities built into the system allow automated turn-up of the links, allowing “plug play” network engineering and minimizing technician time and technical proficiency requirements for network turn-up. Once the network is deployed, customer traffic is simply provisione