Broadband Access Networks
Emerging broadband services are driving a new generation of metro access and backhaul networks. Residential bandwidths of up to 100 Mb/s and business services up to 10 Gb/s have to be supported on a broad scale. In order to reduce network operators cost, unified access/backhaul architectures which support all services, applications, and bit rates and replace application-specific and legacy solutions have to be implemented. These networks should be based on a future-proof WDM infrastructure for scalability and cost reasons. Migration can start with passive WDM technology. The WDM systems can then be complemented by ADM-like TDM functionality for GbE services and Layer-2 Ethernet switching functionality. In later migration steps, point-to-multipoint logical connectivity can be implemented on a per-wavelength basis. Optional WDM amplification and protection enhance maximum reach and service availability. When wavelength grid and per-channel bit rate of these WDM-PONs are optimized, cost points of standard GPON can be reached while at the same time improving total capacity, splitting ratio, and reach.
KeywordsAccess Network Power Budget Passive Optical Network Digital Subscriber Line Backhaul Network
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