APN in LTE and DNN in 5G Core Are Similar Until the Architecture Matters
APN and DNN both identify data-network intent, but the surrounding EPC and 5GC procedures are different enough that treating them as pure renames is misleading.
Open5GS
The Mobile Core Lab Became Useful When I Could Break It Predictably
A working lab proves very little. A lab becomes valuable when failures can be introduced, observed and explained on demand.
Open5GS Made the EPC Feel Like a Set of Services Instead of One Big Core
Breaking the EPC into MME, HSS, SGW, PGW and PCRF roles made LTE core traffic much easier to follow in captures and logs.
APNs, PGW Selection and the Path to the Data Network
An APN is more than a label on the handset; it influences how a subscriber session reaches a packet gateway and an external data network.
Prometheus Metrics Changed How I Looked at a Mobile Core Lab
Logs explain individual failures; metrics show whether the system is drifting before the failures become obvious.