5G Troubleshooting — Module 8: EN-DC and SCG Failure
An EN-DC SCG failure is the only fault in this course where everything works and the customer is still right to complain. The NR leg fails, the LTE anchor holds…[...]
Read More
5G Troubleshooting — Module 7: Handover Failures in SA and NSA
A 5G handover failure is the fault class that punishes aggregate thinking. A cell showing a 98 percent handover success rate can be losing every third session on one neighbor…[...]
Read More
5G Troubleshooting — Module 6: Core, QoS and Slice Limits
5G QoS troubleshooting is the last place anyone looks and frequently the place the answer is. A session can have an excellent radio link, a clean transport path, and still…[...]
Read More
5G Troubleshooting — Module 5: Transport, MTU and the TCP Ceiling
5G transport troubleshooting begins where Module 4 ended: the radio has been proven healthy, and throughput is still poor. This is the point at which most investigations stall, because the…[...]
Read More
5G Troubleshooting — Module 4: Low Throughput on the Radio Side
A 5G low throughput complaint is the most commonly misdiagnosed fault in the network, and the reason is organizational rather than technical. Throughput is the KPI radio teams own, so…[...]
Read More
5G Troubleshooting — Module 3: Session Drops, Radio Link Failure and Handover
A 5G radio link failure is the network's way of admitting it lost a UE it was already serving. Unlike a registration failure, nothing rejected anything — the session was…[...]
Read More
5G Troubleshooting — Module 2: Registration and Attach Failures in SA and NSA
A 5G registration failure is the most tractable fault class in the network, because the procedure is a fixed sequence of messages and the network usually tells you which one…[...]
Read More
5G Troubleshooting — Module 1: Signaling Flows, Cause Codes and Layer Elimination
Most 5G troubleshooting fails for the same reason: the engineer starts at the layer they know best rather than the layer the evidence points to. A radio engineer blames coverage.…[...]
Read More
Conditional Handover in 5G NR: Preparing for Failure Before It Happens
Conditional handover in 5G NR procedures exist to solve one specific problem: every legacy handover in cellular networks has the same structural weakness — the network waits until radio conditions…[...]
Read More
Introduction to 5G — Module 14: Mobility and Handover in 5G — Xn and N2 Handovers, and Session Continuity
5G handover Xn N2 procedures are defined step-by-step in 3GPP TS 38.300 (overall description) and TS 23.502 Section 4.9 (detailed signaling flows) — and the specific messages exchanged at each…[...]
Read More