The first SMS was sent in 1993, and all these years later as 5G rolls out, we’re still supporting it.
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 […]
A look at the Equipment Identity Register in 5G Core
Setting up Open5Gs without a NAT requirement, and the routing required to do so.
As the number of Private Networks built on LTE and 5G grow, how will PLMN allocation be managed?
Peer behind the magic curtain at how IMS networks route your VoLTE and VoNR calls, and how iFC (Initial Filter Criteria) achieve this.
5G introduces Network Slicing, or does it? A look at slicing mechanisms widely used in pre-5G networks.
A look at non-IP transport for 5G including Ethernet.
New database time to support slicing and a migration path for existing users.
How to find a subscriber location within the network.
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 […]
A look at MTU and its role in LTE and 5G Transmission.
A look at the Confidentiality Algorithms used in 3GPP Networks, MILENAGE, XOR & Comp128
Acronyms and cryptography – a look at Subscriber Identifiers in 5G
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 […]
Configuring the NRF for Open5GS
A look at the Network Function Repository Function (NRF) in 5G Core
Comparing the Control Plane signalling in 5GC compared to EPC.
How User Plane traffic is handled in 5GC compared to EPC
No talk of Augmented Reality, Holographic Video calls, 5G cities. Just info about real 5G topics for nerds.