Abstract
This work presents a hybrid ring-mesh topology based passive optical network with free space optics (PON/FSO) model for bidirectional transmission at 10 × 10/10Gbps throughput to offer information to the fiber-FSO subscribers simultaneously with enhanced disaster resilience and fault protection capability. Fiber impairments, FSO link weather and turbulent conditions’ tolerance can be enhanced by using a new two-dimensional modified fixed right shifting (2D-MFRS) code for upstream and downstream transmission through integrated fiber-FSO links. A PON/FSO model using 2D-MFRS code is a promising network that raises the network reliability, security and survivability, especially in rural places where the core fibre link may be damaged or destroyed. The obtained numerical and simulation results show that proposed model provides 90–130 km fiber range with fixed 100 m FSO range. FSO range of 850–1900 m with fixed 10 km fiber length can be obtained concerning weak-to-strong turbulent as well as distinct weather conditions. Also, hybrid ring-mesh topology is able to sustain −11 to −18dBm receiver sensitivities in wired-wireless transmission. The proposed model is also capable to handle 130 to 160 subscribers at symmetric 50Gbps/channel throughput. At acceptable bit error rate, low power penalty of 1 dB and −24 dB power budget are observed between back-to-back and integrated fiber-FSO link. Additionally, high signal to noise ratio of 95 dB can be maintained effectively by the system supporting 10 optical units per remote node and it also shows successful transmission upto 1:64 split ratio. Finally, the comparative literature work reveals that the proposed model offers security, long-reach, high transmission rate, and cost-effectiveness for fifth generation fronthaul/backhaul networks.
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Kumari, M. Modeling of disaster resilience 5G fronthaul/backhaul hybrid ring-mesh topology based PON/FSO system using 2D-modified FRS code. Opt Quant Electron 55, 1098 (2023). https://doi.org/10.1007/s11082-023-05398-0
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DOI: https://doi.org/10.1007/s11082-023-05398-0