Categories
EUTRAN LTE Mobile Networks RF

Huawei Baseband Cheat Sheet

Quick reference guide for the types and capacities of Huawei BBU 3900 Series cards

Categories
EPC EUTRAN IMS / VoLTE LTE Mobile Networks

Lifecycle of a Dedicated Bearer – From Flow-Description AVP to Traffic Flow Templates

To support Dedicated Bearers we first have to have a way of profiling the traffic, to classify the traffic as being the type we want to provide the Dedicated Bearer for. The first step involves a request from an Application Function (AF) to the PCRF via the Rx interface. The most common type of AF […]

Categories
5G SA EPC LTE Mobile Networks SDM

Backing up and Restoring Open5GS

How to backup and restore Open5Gs config between servers

Categories
EPC LTE Mobile Networks RFCs & Standards SDM Voice over IP

Basics of EPC/LTE Online Charging (OCS)

A glimpse into the complexities of prepaid billing (Online Charging) Diameter based networks.

Categories
EPC LTE Mobile Networks RFCs & Standards SDM

Diameter – Insert Subscriber Data Request / Response

A look at how the HSS can update the profile of an already in-use subscription using Insert Subscriber Data Request/Response.

Categories
EPC LTE Mobile Networks SDM SIM Cards

PS Data Off

How turning mobile data off, doesn’t, in LTE and 5G.

Categories
5G SA EPC EUTRAN LTE Mobile Networks RFCs & Standards SDM Security SIM Cards

The PLMN Problem for Private LTE / 5G

As the number of Private Networks built on LTE and 5G grow, how will PLMN allocation be managed?

Categories
EPC LTE Mobile Networks

How UEs get Time in LTE

How does “Network Time” actually get to the UE?

Categories
5G SA EPC IMS / VoLTE LTE Mobile Networks SDM Voice over IP

IMS Routing with iFCs

Peer behind the magic curtain at how IMS networks route your VoLTE and VoNR calls, and how iFC (Initial Filter Criteria) achieve this.

Categories
5G SA EPC EUTRAN GSM LTE Mobile Networks RFCs & Standards

Pre-5G Network Slicing

5G introduces Network Slicing, or does it? A look at slicing mechanisms widely used in pre-5G networks.

Categories
EPC GSM IMS / VoLTE LTE Mobile Networks RFCs & Standards

The Surprisingly Complicated world of MO SMS in IMS/VoLTE

Short messaging can be anything but simple…

Categories
5G SA EPC LTE Mobile Networks SDM Software

Open5Gs Database Schema Change

New database time to support slicing and a migration path for existing users.

Categories
EPC LTE Mobile Networks Python

PyHSS Update – SCTP Support

Info on PyHSS new support for SCTP as well as TCP.

Categories
5G SA EPC LTE Mobile Networks

MTU in LTE & 5G Transmission Networks – Part 1

A look at MTU and its role in LTE and 5G Transmission.

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 […]

Categories
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.

Categories
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 […]

Categories
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.

Categories
EUTRAN LTE Mobile Networks RF

DIY RAN Adventures – Antennas

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

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.