Allegro Project Insight: Cost-Effective Backbone Networks with OSNR-Aware Design

Our latest evaluation focuses on the impact of OSNR budgets and P2P transceiver costs on total network expenditure.

🔍 Highlights from Figures 45 & 46:

• Figure 45 presents the distribution of P2P transceivers under OSNR degradations of:
  • (a) 1.5 dB/span
  • (b) 3.0 dB/span
  • (c) 4.5 dB/span
  Across all cases, P2P transceivers are gradually phased out as higher OSNR budgets allow leaf nodes to directly reach National Nodes without requiring additional hops.
• Figure 46 illustrates the total transceiver cost comparison, assuming a 3 dB/span OSNR degradation.
  🔽 Transceiver costs drop dramatically—from 70% down to 30%—as P2P transceiver prices are reduced.
• The minimum cost is consistently achieved when the OSNR budget reaches 4.5 dB, regardless of the actual cost of P2P transceivers.
  ✅ Why? Because at 4.5 dB, the need for P2P connections is virtually eliminated, optimizing the network design.

These findings further confirm that OSNR-aware architectures not only enable longer reach but also significantly lower network costs through smarter transceiver deployment. 💡

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