A look at attack vectors the NRF opens up in #5G Core networks, and the mitigations recommended by 3GPP.
Category: Mobile Networks
Looking for Love in the 5G Core?
Are you a lonely UDM from MCC 001 MNC 001, just looking for a connection?
PLMN 901/70, NRF, seeks same.
Let’s look at our matchmaker – The Network Repository Function in 5G Core.
A look at how characters are encoded in an SMS.
Categories
Backing up and Restoring Open5GS
How to backup and restore Open5Gs config between servers
How GTP is extended in 5G Core Networks to support extra QoS functionality like Reflective QoS and Delay Indicators
Another deep dive into deceptively simple seeming functions to do with SMS.
Categories
Framed Routing in 5G
5GC includes native support for framed-routing.
Categories
Reflective QoS in 5G
A great new feature of #5G Core Networks is Reflective QoS – Where QoS of the traffic coming to a UE is reflected on the QoS coming out.
Categories
SMS in 5GC
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 Centralized vs DeCentralized Online Charging with the aid of sugar.
After headaches importing elevation (DEM) data into Forsk Atoll, I found a better mechanism for converting them, I’d been having issues with as soon as the elevation passed 255 meters, resetting to 0 in the PNG as it didn’t understand values beyond this. I was able to open the elevation data in GlobalMapper (You can […]
A look at the Equipment Identity Register in 5G Core
A glimpse into the complexities of prepaid billing (Online Charging) Diameter based networks.
Categories
Open5GS without NAT
Setting up Open5Gs without a NAT requirement, and the routing required to do so.
A look at how the HSS can update the profile of an already in-use subscription using Insert Subscriber Data Request/Response.
Categories
PS Data Off
How turning mobile data off, doesn’t, in LTE and 5G.
A Bind environment in a Docker container for experimenting and learning ENUM for DNS based Call Routing.
Using DNS to resolve E.164 phone numbers to routable SIP URIs
A look at Multimedia Messaging (MMS) in 3GPP Networks and how it actually works.