Technology Transition Risk
Every technology shutdown creates a regression window. Legacy subscribers, devices, and use cases do not migrate on schedule.
The 2G/3G shutdown is not complete until active probe coverage confirms it. Internal counters confirming zero traffic are necessary but not sufficient.
The Mechanism
When an operator shuts down 2G or 3G, the assumption is that all devices have migrated to 4G/5G. In practice, M2M devices, IoT sensors, alarm systems, and elderly handsets remain on legacy radio. The shutdown creates a regression window where coverage obligations may be breached, device failures go undetected, and signalling anomalies from misconfigured devices can destabilise the core. Only active testing from the subscriber perspective confirms the transition is clean.
At L4 — Autonomous Networks
At L4, technology transition monitoring is continuous. The autonomous network detects migration stragglers, identifies their economic value, and triggers targeted device management or customer outreach without human initiation.
Derived Functions
Model Integrity Verification
Is the network's internal model of itself still accurate — or has model drift occurred since the last calibration?
Security Resilience Monitoring
Is the network detecting and neutralising signalling attacks, fraud patterns, and infrastructure threats before they reach subscribers?
Anchored Use Cases
2G/3G Shutdown Regression Detection
Active test detects voice or data failure on 4G in cells where 2G/3G was recently decommissioned.
Signalling Attack Detection
Passive probe detects anomalous SS7 location request volume — 400% above baseline — originating from a single interconnect partner.
5G SA Coverage Obligation Proof
Regulator requests evidence of 5G SA population coverage meeting licence condition of 80% by end of year.
Cloud RAN Vendor Platform Health
Active probe detects increasing call setup failures correlated with a single vDU vendor platform in three regional clusters.