Self-Healing Hybrid Protection Architecture for Passive Optical Networks

Abstract

Abstract-Expanding size of passive optical networks (PONs) along with high availability expectation makes the reliability performance a crucial need. Most protection architectures utilize redundant network components to enhance network survivability, which is not economical. This paper proposes new self-healing protection architecture for passive optical networks (PONs), with a single ring topology and star-ring topology at feeder and distribution level respectively. The proposed architecture provides desirable protection to the network by avoiding fiber duplication at both feeder and distribution level. Moreover, medium access control (MAC) controlled switching is utilized to provide efficient detection, and restoration of faults or cuts throughout the network. Analytical analysis reveals that the proposed self-healing hybrid protection architecture ensures survivability of the affected traffic along with desirable connection availability of 99.9994 % at minimum deployment cost, through simple architecture and simultaneous protection against failures.

Impact of Fiber Duplication on Protection Architectures Feasibility for Passive Optical Networks

“…The basic ring-based PON is shown in Figure 3, which contains OLT module at the CO. In order to avoid the high deployment cost of OLT module, this architecture employs a single unit, owing to the fact that failure per year of OLT module is minuscule [4,18]. End-face of the OLT module is connected to a switching arrangement ðSA co Þ that extends the OF medium in both clockwise (CW) and counter clockwise (CCW) directions.…”

“…(6) shows that capacity of the network increases when more ONUs are placed per RN. Furthermore, it is observed that for P T ¼ 10 dBm, P edfa ¼ 25 dB, and R sen ¼À25 dBm, the ring-based hybrid protection architecture can efficiently support 128 subscribers simultaneously accessing the medium [18].…”