Categories
5G SA Mobile Networks

SMS in 5GC

The first SMS was sent in 1993, and all these years later as 5G rolls out, we’re still supporting it.

Categories
5G SA Mobile Networks RFCs & Standards

5G Online Charging with the Nchf_ConvergedCharging SBI

There’s no such thing as a free lunch, and 5G is the same – services running through a 5G Standalone core need to be billed. In 5G Core Networks, the SMF (Session Management Function) reaches out to the CHF (Charging Function) to perform online charging, via the Nchf_ConvergedCharging Service Based Interface (aka reference point). Like […]

Categories
5G SA Mobile Networks SDM

EIR in 5G Networks (N5g-eir_EquipmentIdentityCheck)

A look at the Equipment Identity Register in 5G Core

Categories
5G SA EPC Linux LTE Mobile Networks

Open5GS without NAT

Setting up Open5Gs without a NAT requirement, and the routing required to do so.

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
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
5G SA Mobile Networks RFCs & Standards

5Gethernet? – Transporting Non-IP data in 5G

A look at non-IP transport for 5G including Ethernet.

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

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.

Categories
5G SA LTE Mobile Networks Python Security Software

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 Instead of having everything defined all over the place a single YAML config file is used to define how the HSS should function. SCTP Support […]

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
5G SA GSM LTE Mobile Networks RFCs & Standards SDM Security SIM Cards

Confidentiality Algorithms in 3GPP Networks: MILENAGE, XOR & Comp128

A look at the Confidentiality Algorithms used in 3GPP Networks, MILENAGE, XOR & Comp128

Categories
5G SA Mobile Networks SDM Security SIM Cards

5G Subscriber Identifiers – SUCI & SUPI

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

Categories
5G SA Mobile Networks

My first 5G Core: Open5Gs and UERANSIM

Note: As this space develops so quickly I’ve refreshed the original post from November 2021 in March 2021 with updated instructions. 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 […]

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
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.