Cplane Switching

As mobile operators continue to transition between 4G and 5G, one of the biggest operational challenges is maintaining consistent Control Plane visibility when subscribers move across Radio Access Technologies (RATs). The Aviz Service Node bridges this visibility gap. Acting as a passive, observability-driven mediation layer, it maintains continuous and correlated session tracking across EPC and 5GC interfaces — enabling seamless 4G ↔ 5G handover insights without any change to the live network configuration.

Aviz Service Node automatically detects handovers between EPC and 5GC through IMSI-based session matching and performs an in-place session upgrade logic — maintaining a unified view of the subscriber session throughout the transition. During each transition, ASN dynamically updates metadata exports to Kafka, reflecting real-time field updates such as RAT type, user type, IP, and TEIDs — ensuring analytics and monitoring systems always have synchronized, current session data.