About this document
VoLTE Troubleshooting Guide for Irancell by ic-poenya is a document available to read on EtoBox.
The document discusses VoLTE architecture and call flows. It covers topics like IMS registration, call flows, and analyzing VoLTE drops through layer-3 signaling traces, PCAPs, CLOGs, CSLs, and eNB traces. Specifically, it describes analyzing VoLTE drops by looking at SIP errors, S1AP causes, RRC release causes, RRE rejections, abnormal signaling triggering RACH procedures, and the lack of RRC re-establishment requests in eNB traces.
- Author
- ic-poenya
- Language
- EN