Categories
EPC EUTRAN IMS / VoLTE LTE Mobile Networks SDM Security SIM Cards

Roll your own USIMs for Private LTE Networks

Adventures in getting USIMs to use on private LTE networks.

Categories
EPC EUTRAN IMS / VoLTE LTE Mobile Networks RFCs & Standards VoIP

The case for Header Compression in VoIP/VoLTE

Robust Header Compression (ROHC) and it’s use for compressing RTP / VoLTE traffic headers.

Categories
EPC EUTRAN GSM IMS / VoLTE LTE Mobile Networks SIM Cards Software

Building Android APN / Carrier Config

How Android OS autoprovisions APN settings and how to set your own for your unique MCC & MNC.

Categories
EPC EUTRAN IMS / VoLTE LTE Mobile Networks Python RF RFCs & Standards SDM

PyHSS – Python 3GPP LTE Home Subscriber Server

I recently started working on an issue that I’d seen was to do with the HSS response to the MME on an Update Location Answer. I took some Wireshark traces of a connection from the MME to the HSS, and compared that to a trace from a different HSS. (Amarisoft EPC/HSS) The Update Location Answer […]

Categories
EPC IMS / VoLTE LTE Mobile Networks Notes RFCs & Standards SDM Security SIM Cards Software VoIP

All About IMS Authentication (AKAv1-MD5) in VoLTE Networks

How the AKAv1-MD5 algorith derives keys and how it’s used in IMS Networks