Categories
Mobile Networks RF

DIY LTE RAN Adventure – POWER! (systems)

All the gear I’ve got so far for my DIY RAN Project requires -48vDC to power it up. Back to online auction websites and preso I’ve ended up with an Eltek MPSU3000, from the mid 2000s. The fellow I bought it from was even nice enough to throw a binder full of printed documentation, which […]

Categories
5G SA Mobile Networks Security SIM Cards

5G Subscriber Identifiers – SUCI & SUPI

Acronyms and cryptography – a look at Subscriber Identifiers in 5G

Categories
EUTRAN LTE Mobile Networks RF

DIY RAN Adventures – Antennas

Picking and validating antenna selection for the new RAN project in my lab.

Categories
Mobile Networks Security SIM Cards

SIM Unlock Shims

What do Unlock SIMs sold online actually do and how do they do it?

Categories
GSM Mobile Networks

GSM with Osmocom: OsmoSGSN for Packet Data

Configuring the Osmocom Serving Gateway Support Node (SGSN) for 2G/3G networks.

Categories
5G SA Mobile Networks

My first 5G Core: Open5Gs and UERANSIM

While 5G SA devices are still in their early stages, and 5G RAN hardware / gNodeBs are hard to come by, so today we’ll cover using UERANSIM to simulate UEs and 5G RAN, to put test calls through our 5GC. Bringing your 5G Core Online We’ll use Open5Gs for all the 5GC components, and install […]

Categories
GSM Mobile Networks RF

Using a NanoVNA to analyse SDR Base Station Antennas

Using a NanoVNA to analyse antenna performance for SDR driven Base Stations for GSM / LTE.

Categories
5G SA Mobile Networks

Open5GS – NRF Setup

Configuring the NRF for Open5GS

Categories
5G SA Mobile Networks RFCs & Standards

5GC: The Network Function Repository Function

A look at the Network Function Repository Function (NRF) in 5G Core

Categories
EUTRAN LTE Mobile Networks

My used Huawei BTS3900 LTE RAN Adventure – The Impulse Purchase

How I ended up with a Macro LTE eNodeB (Huawei BBU3900) and getting it running.

Categories
5G SA EPC Mobile Networks RFCs & Standards

5GC for EPC Folks – Control Plane Signalling

Comparing the Control Plane signalling in 5GC compared to EPC.

Categories
5G SA EPC Mobile Networks RFCs & Standards

5GC for EPC Folks – User Plane Traffic

How User Plane traffic is handled in 5GC compared to EPC

Categories
5G SA Mobile Networks RFCs & Standards

Meta: 5G on this Blog

No talk of Augmented Reality, Holographic Video calls, 5G cities. Just info about real 5G topics for nerds.

Categories
Voice over IP

SIP Hold – With RFC6337

How SIP hold using RFC6336 is implemented and how it looks in production.

Categories
EPC LTE Mobile Networks

LTE EPC: Packet Gateway (P-GW) Basic Function

The Packet Gateway’s purpose in the EPC.

Categories
EPC LTE Mobile Networks

LTE EPC: Serving Gateway (S-GW) Basic Function

Basic processes and functions of the LTE EPC Serving Gateway (S-GW).

Categories
RFCs & Standards Voice over IP

FreeSWITCH WebRTC with sipML5

Using FreeSWITCH to serve WebSocket / WebRTC connections

Categories
Linux Software

Docker Cheatsheet

Cheat sheets for common Docker Commands

Categories
Asterisk Kamailio Voice over IP

Kamailio Bytes – Gotchas with Kamailio as an Asterisk Load Balancer

Things to keep in mind before using Kamailio as a Load Balancer for Asterisk

Categories
Linux Security

mkcert – Simple Localhost Certs

Using Mkcert to generate valid SSL certificates on your local machine for development