TECHNICAL
Figure 4: CAPEX savings achieved by mixed PON/active architecture for optical splitting of feeder fiber: 1->32
Network operators are looking for comprehensive solutions to address their primary pain point around deploying fibre in the access network—OSP/ODN cost and PON reach limitation. This business case analysis has established the fact that the mixed passive/active architecture based on Ciena’s UA solution addresses a technical limitation of the purely passive PON-only architecture (reach limitation due to optical splitting loss), while resulting in significant cost-savings for network operators.
For optical split of feeder fibre: 1->64 (average bitrate/subscriber: 155.5Mb/s): the mixed PON/active architecture becomes more cost-effective at a feeder distance of 5.2km and results in cost savings of 20.5 and 36.2 per cent at feeder lengths of 10 and 20km, respectively. For optical split of feeder fibre: 1->32 (average bitrate/subscriber: 311Mb/s): the mixed PON/active architecture becomes more cost-effective at a feeder distance of 3.8km and results in cost savings of 27.5 and 42.3 per cent at feeder lengths of 10 and 20km, respectively.
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Figure 5: CAPEX savings achieved with mixed PON/active architecture at different optical split ratios of a feeder fiber as a function of the feeder [CO to cabinet] distance
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Volume 46 No.2 MAY 2024
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