A look at attack vectors the NRF opens up in #5G Core networks, and the mitigations recommended by 3GPP.
Category: RFCs & Standards
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.
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 glimpse into the complexities of prepaid billing (Online Charging) Diameter based networks.
A look at how the HSS can update the profile of an already in-use subscription using Insert Subscriber Data Request/Response.
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.
Chances are if you’re reading this, you’re trying to work out what Telephony Binary-Coded Decimal encoding is. I got you. Again I found myself staring at encoding trying to guess how it worked, reading references that looped into other references, in this case I was encoding MSISDN AVPs in Diameter. How to Encode a number […]
As the number of Private Networks built on LTE and 5G grow, how will PLMN allocation be managed?
Categories
SCTP Parameter Tuning
A look at tuning your SCTP parameters to detect failures quickly and reduce dropped packets when they happen.
5G introduces Network Slicing, or does it? A look at slicing mechanisms widely used in pre-5G networks.
Getting to know IPfilterRules and the Flow-Description AVP
Short messaging can be anything but simple…
A look at non-IP transport for 5G including Ethernet.
Categories
Diff + Wireshark
Comparing packet contents with Wireshark and a diff utility
Peculiar padding problem perplexes poor programmer.
How to find a subscriber location within the network.
Australia is a strange country; As a kid I was scared of dogs, and in response, our family got a dog. This year started off with adventures working with ASN.1 encoded data, and after a week of banging my head against the table, I was scared of ASN.1 encoding. But now I love dogs, and […]
Categories
SCTP Multihoming
A look at SCTP multi-homing in practice.