Pre-5G Network Slicing
Nick 5G introduces Network Slicing, or does it? A look at slicing mechanisms widely used in pre-5G networks.
LTE
Diameter Droplets – The Flow-Description AVP and IPFilterRules
Getting to know IPfilterRules and the Flow-Description AVP
The Surprisingly Complicated world of MO SMS in IMS/VoLTE
Short messaging can be anything but simple...
Open5Gs Database Schema Change
New database time to support slicing and a migration path for existing users.
A very unstable Diameter Routing Agent (DRA) with Kamailio
I’d been trying for some time to get Kamailio acting as a Diameter Routing Agent with mixed success, and eventually got it working, after a few changes to the codebase…
PyHSS Update – YAML Config Files
Introducing YAML based config files for defining how PyHSS should be setup
MSISDN Encoding in Diameter AVPs – Brought to you by the letter F
Peculiar padding problem perplexes poor programmer.
PyHSS Update – SCTP Support
Info on PyHSS new support for SCTP as well as TCP.
And the call was coming from… INSIDE THE HOUSE. A look at finding UE Locations in LTE
How to find a subscriber location within the network.
PyHSS New Features
Thanks to some recent developments, PyHSS has had a major overhaul recently, and is getting better than ever, Some features that are almost ready for public release are: Config File…
MTU in LTE & 5G Transmission Networks – Part 1
A look at MTU and its role in LTE and 5G Transmission.
Getting the GTP-U Packets flowing Fast – DPDK & SR-IOV
How SR-IOV and DPDK play into faster performance of Virtual Network Functions (VNFs) for 3GPP core networks.
Confidentiality Algorithms in 3GPP Networks: MILENAGE, XOR & Comp128
A look at the Confidentiality Algorithms used in 3GPP Networks, MILENAGE, XOR & Comp128
Enable GPS/GLONASS Sync on Huawei BTS3900
Our BTS is going to need an accurate clock source in order to run, so without access to crazy accurate Timing over Packet systems or TDM links to use as…
SIM / Smart Card Deep Dive – Part 3 – APDUs and Hello Card
A look at APDUs and Interacting with Cards
SIM / Smart Card Deep Dive – Part 2 – Meet & Greet
The basics of Smart Cards & their File System
SIM / Smart Card Deep Dive – Part 1 – Introduction to Smart Cards
Getting up close and personal with Smart Card / SIM Cards
Cell Broadcast in LTE
A look at how Cell Broadcast is signalling implemented between the MME and CBC in an LTE/EPC network.
Huawei BTS 3900 LMPT Basic Config
This post is one in a series documenting my adventures attempting to configure a used BTS 3900 to function as a eNB in my lab. There are 5 network ports…
Huawei BTS3900 – MML Basics
Learning Huawei's flavour of MML - Man Machine Language for the BTS 3900 series Macro Base Stations.