Wheel architecture based ITU-T G.9804.x standard 50G-NGPON2 incorporating 2D-MFRS OCDMA code for beyond 5G networks

Abstract

In this work, a wheel-based architecture for 50-gigabit per second next-generation passive optical network stage 2 (50G-NGPON2) represents a promising solution for beyond fifth generation networks. A two-dimensional modified fixed right shifting (2D-MFRS) code is designed and implemented in the proposed architecture to enhance the system capacity and security. The results show that the transmission of 50 Gbps per channel signals over 50–200 km fiber offers high receiver sensitivities of − 17.6 dBm in downlink and − 17.7 dBm in uplink direction with less power penalty of 0.8 dB at the bit error rate of 10^–9. In comparisons with existing optical code division multiple access codes, the proposed architecture using 2D-MFRS code supports upto maximum 260 end subscribers, but also ensures superior performance against the fiber linear and non-linear effects. The simulation results show that the proposed wheel based architecture with 1:128 split ratio drastically improves the fiber reach upto 310 km in uplink and 280 km in downlink direction, compared to other existing passive optical networks (PONs). It is also revealed that the proposed design offers preferable results in terms of high gain and output signal to noise ratio with low noise figure as compared to existing 50 gigabit per second time division multiplexing PON, 50G-NGPON2 and conventional PON. The comparative literature reveals the superiority of proposed design over other existing topologies.