A look at the PCRF in EPC Networks, and the Charging Rules that lay at the heart of it all.
Using FreeDiameter, Python and our newly released “rt_pyform” module to rewrite AVPs in your FreeDiameter based Diameter Routing Agent.
An overview of the who, how and why of Non-IP Data Deliver in NB-IoT cellular services.
A look at why we’d want to apply translations to Diameter AVPs inside a Diameter Routing Agent
Looking at overriding the default Diameter routing logic in FreeDiameter with rt_default
Diving back into the world of Diameter Routing Agents with a look at the logic that defines how a DRA routes traffic from one place to another.
An introduction to Diameter Routing Agents, covering what is a DRA is and why you need them in your life / network.
Filtering for 3gppnetwork.org domains in Wireshark to make your troubleshooting easier
Using OpenSSL to generate self-signed certs for use in FreeDiameter
Step right up folks and test your skills on EPC with this PCAP analysis challllleeennnggeee!
Backing up and Restoring Open5GS
How to backup and restore Open5Gs config between servers
A glimpse into the complexities of prepaid billing (Online Charging) Diameter based networks.
Open5GS without NAT
Setting up Open5Gs without a NAT requirement, and the routing required to do so.
A look at how the HSS can update the profile of an already in-use subscription using Insert Subscriber Data Request/Response.
How UEs get Time in LTE
How does “Network Time” actually get to the UE?
5G introduces Network Slicing, or does it? A look at slicing mechanisms widely used in pre-5G networks.
Open5Gs Database Schema Change
New database time to support slicing and a migration path for existing users.
A look at MTU and its role in LTE and 5G Transmission.
The Packet Gateway’s purpose in the EPC.
Basic processes and functions of the LTE EPC Serving Gateway (S-GW).