High-Bit-Rate Dynamically Reconfigurable WDM–TDM Access Network

Flexible TDMA/WDMA passive optical network: Energy efficient next-generation optical access solution

“…The passive components based reconfigurability, however, imposes a higher insertion loss penalty. The active components based re-configurable solutions are proposed in [26] and [27]. The solution proposed in [26] uses an array of SOAs to provide a fully flexible solution.…”

“…The authors in [27] propose a re-configurable remote node configuration based on re-configurable optical add drop multiplexers (OADMs) equipped with micro-resonators. Further, the authors in [28] propose a quasi-passive reconfigurable remote node solution to provide flexibility.…”

“…The quasi-passive reconfigurable solution consumes power only during reconfiguration and requires no steady-state power. The solutions proposed in [27] and [28], however, require a complex remote node element, which is not available off-the-shelf at a low cost. Moreover, many advantages of flexibility can be obtained by using WSSs.…”

Super-Broadband Wireless Access Network

“…By using the WDM technique, the access network can: 1) separate services; 2) separate service providers; 3) enable traffic routing; 4) provide higher capacity; 5) improve scalability. For assignment of wavelengths to channels the system may follow different scenarios such as: a) static allocation; b) semi-static allocation; c) dynamic allocation, (Urban et al, 2009). …”

On the Conditions That Justify Requiring Dynamic Reconfigurability in WDM–TDMA Optical Access Networks

“…The study of DRWA schemes is part of the current research in WDM-PONs [2][3][4][5]. Approaches depend on the specific architecture, but they may be classified according to objective as either extra capacity or load balancing schemes.…”