Categories
EUTRAN Mobile Networks

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 reference sources, I’ve opted to use the GPS/GLONASS receiver built into the LMPT card. Add new GPS with ID 0 on LMPT in slot 7 […]

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GSM LTE Mobile Networks Security SIM Cards

SIM / Smart Card Deep Dive – Part 3 – APDUs and Hello Card

A look at APDUs and Interacting with Cards

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GSM LTE Mobile Networks Security SIM Cards

SIM / Smart Card Deep Dive – Part 2 – Meet & Greet

The basics of Smart Cards & their File System

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GSM LTE Mobile Networks Security SIM Cards

SIM / Smart Card Deep Dive – Part 1 – Introduction to Smart Cards

Getting up close and personal with Smart Card / SIM Cards

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EPC EUTRAN LTE Mobile Networks RFCs & Standards

Cell Broadcast in LTE

A look at how Cell Broadcast is signalling implemented between the MME and CBC in an LTE/EPC network.

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EUTRAN LTE Mobile Networks

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 on the LMPT card: 2x SFP cages – SFP 0 and SFP 1 1x 10/100 Ethernet port – ETH – Used to access the Local […]

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EUTRAN LTE Mobile Networks RF

Huawei BTS3900 – MML Basics

Learning Huawei’s flavour of MML – Man Machine Language for the BTS 3900 series Macro Base Stations.

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EUTRAN LTE Mobile Networks

Connecting to a Huawei BTS3900

Meta: This post is a series chronicling my adventures with a second hand Huawei BTS3900 I purchased. You can find an index of these posts here. So you purchased a used Macro base station online, good for you. Now you need to know how to configure it. First things first, you’ll need to connect to […]

Categories
SIM Cards

SIMtrace Cases

I put together some laser cut case designs for the Osmocom SIMtrace, Quite happy with the results. If you want to cut your own, I’ve sent the DXF files to the mailing list, and will try and add to the project.

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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 […]

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5G SA Mobile Networks Security SIM Cards

5G Subscriber Identifiers – SUCI & SUPI

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

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EUTRAN LTE Mobile Networks RF

DIY RAN Adventures – Antennas

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

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Mobile Networks Security SIM Cards

SIM Unlock Shims

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

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GSM Mobile Networks

GSM with Osmocom: OsmoSGSN for Packet Data

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

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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 […]

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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.

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5G SA Mobile Networks

Open5GS – NRF Setup

Configuring the NRF for Open5GS

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5G SA Mobile Networks RFCs & Standards

5GC: The Network Function Repository Function

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

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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.