TECHNICAL
Hence the required number of feeder fibres is two for all split ratios. The cost increases marginally as feeder length and/ or delivered capacity increase. 10G XGS-PON business case: A comparison of traditional PON architecture versus mixed PON/ active architecture based on Ciena’s UA solution Figure 2c shows the sizing of the required aggregator capacity for various optical split ratios as follows: 11. For optical splitting: 1->N = 128; required aggregator capacity: 80 Gb/s (=10Gb/s x 8 feeder fibres) 12. For optical splitting: 1->N = 64; required aggregator capacity: 160 Gb/s (=10Gb/s x 16 feeder fibres) 13. For optical splitting: 1->N = 32; required aggregator capacity: 320 Gb/s (=10Gb/s x 32 feeder fibres) Cost modeling Figures 3a and 3b show the network cost components of the traditional PON FTTx architecture and the mixed PON/active FTTx architecture based on Ciena’s UA solution, respectively. A CAPEX business model is assumed in a brownfield deployment scenario. Network cost components include: 14. CO/OLT node: electronics (Ciena 5170), software, power 15. Feeder loop: cable material/ installation
Figure 2a: Traditional PON FTTx architecture with OLT located in CO
Figure 2b: PON/active FTTx architecture (based on Ciena’s UA solution) with OLT remoted to cabinet node
Figure 2c: Sizing Ciena’s UA capacity requirement for different optical split ratios
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Volume 46 No.2 MAY 2024
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