Solution
Post-processing and root cause analysis
Decode traces, link each degradation to its position, measurements and messages, and establish its cause.
Challenges
Technical challenges
A test-device trace contains radio measurements, RRC and NAS signaling, IMS sessions and IP packets. Making use of it requires decoding, synchronizing and filtering the data, then assigning a cause to each degradation.
Challenge 01
Heterogeneous sources
Diagnostic traces, drive test files, IP captures, application sessions: each source has its own format and its own tool.
Challenge 02
From symptom to root cause
A degraded SINR is a symptom; an overshooting cell, a faulty RF branch or an uplink noise rise are causes.
Challenge 03
Verification
A conclusion must be reproducible by a third party: time, position, cell, message, value.
Results
Benefits for RF engineering teams
- 01Faster, more reliable diagnosis
- 02Conclusions demonstrated by the trace
- 03A common method for all sources