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TRANSPORT NETWORK RESILIENCE

Transmission Ring Optimization & Protection Risk Analyzer

Model ring traffic, calculate span utilization, simulate every N-1 link failure, identify post-protection bottlenecks and compare a targeted capacity upgrade.

Ring utilizationN-1 simulationBottleneck analysisExpansion planning
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Engineering inputs

Set the engineering assumptions and design parameters.

Ring model & traffic matrix

Nodes are numbered 1..N. Equal-hop paths are split 50/50 in the normal state; after a span failure the demand is rerouted over the surviving ring path.

Engineering boundary

This is a vendor-neutral capacity/protection model. Real OTN/PTN/IPRAN/SDH protection behavior, service pinning, shared mesh protection and restoration timers must be verified against the deployed technology and controller/NMS.

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Engineering results

Review calculated capacity, limits and design checks.

Risk & optimization results

Normal max utilization
Worst N-1 utilization
Normal average utilization
N-1 scenarios above limit
Risk score
After candidate upgrade

Worst failed span: · Surviving bottleneck:

N-1 link-failure matrix

Failed spanPeak utilizationResult

Warnings

Optimization actions

Why failure-state loading matters

A ring can look healthy in steady state and still overload after protection switching. This analyzer routes the traffic matrix across the intact ring, then breaks each span one at a time and recomputes the surviving-path loads.

Before / after comparison

The candidate upgrade model increases the worst observed surviving bottleneck span by the selected factor and reruns the full N-1 matrix. It is a screening comparison, not an automatic capital plan.

Model assumptions

The first release is intentionally technology-neutral so the topology, capacity, failure simulation and optimization logic can be validated before adding vendor- or protection-scheme-specific behavior.

Engineering references

ITU-T G.709 · ITU-T G.872 · ITU-T G.808.1

Content reviewed: 2026-09-10

FAQ

Does this simulate every single-link failure?

Yes. For an N-span ring, the engine evaluates N individual span-failure scenarios and reports the worst surviving-link utilization.

How are equal-hop paths handled?

Equal-hop paths are split evenly in the normal state. After one span fails, traffic uses the remaining connected path.

Can this replace an OTN/PTN controller simulation?

No. It is a vendor-neutral planning model. Technology-specific protection, service pinning and restoration must be checked in the deployed platform.

What does the risk score mean?

It combines failure-state utilization above the planning threshold, the number of violating N-1 scenarios, normal-state congestion and ring size.

What does the before/after result optimize?

It upgrades the worst surviving bottleneck span by the selected factor and reruns the N-1 matrix to show the potential reduction in peak utilization.

ENGINEERING WORKFLOW

Continue the engineering workflow

Current workflowAccess & Transport Capacity Optimization Workflow

Plan protected OLT dual uplinks and transport/MSE capacity, then analyze ring protection-state bottlenecks and optimization options.

Step 2 of 2
PreviousOLT Dual-Uplink Capacity, Transport Channel & MSE Port PlannerCalculate OLT dual-uplink ports, transport channels, MSE ports and line cards, then verify single-side failure capacity and path diversity.
NextWorkflow complete

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