How Binding Support Function addresses are found in LTE/5GC.
Tag Archives: 5G
Inside a 32×32 MIMO Antenna
A peek under the radome of 32×32 5G Active Antenna Unit
Some thoughts on NRF Security in 5G Core
A look at attack vectors the NRF opens up in #5G Core networks, and the mitigations recommended by 3GPP.
If you like Pina Coladas, and service the control plane – Intro to NRF in 5GC
Looking for Love in the 5G Core?
Let’s look at our matchmaker – The Network Repository Function in 5G Core.
GTP Extension Headers (PDU session user plane protocol) in 5GC
How GTP is extended in 5G Core Networks to support extra QoS functionality like Reflective QoS and Delay Indicators
Framed Routing in 5G
5GC includes native support for framed-routing.
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.
SMS in 5GC
The first SMS was sent in 1993, and all these years later as 5G rolls out, we’re still supporting it.
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 … Continue reading 5G Online Charging with the Nchf_ConvergedCharging SBI
EIR in 5G Networks (N5g-eir_EquipmentIdentityCheck)
A look at the Equipment Identity Register in 5G Core
PS Data Off
How turning mobile data off, doesn’t, in LTE and 5G.
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?
Pre-5G Network Slicing
5G introduces Network Slicing, or does it? A look at slicing mechanisms widely used in pre-5G networks.
5Gethernet? – Transporting Non-IP data in 5G
A look at non-IP transport for 5G including Ethernet.
Open5Gs Database Schema Change
New database time to support slicing and a migration path for existing users.
MTU in LTE & 5G Transmission Networks – Part 1
A look at MTU and its role in LTE and 5G Transmission.
5G Subscriber Identifiers – SUCI & SUPI
Acronyms and cryptography – a look at Subscriber Identifiers in 5G
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 … Continue reading My first 5G Core: Open5Gs and UERANSIM
Open5GS – NRF Setup
Configuring the NRF for Open5GS
5GC: The Network Function Repository Function
A look at the Network Function Repository Function (NRF) in 5G Core
Random Posts on
Diameter Agents
MMS Deep Dive – MM1 – Mobile Originated MMS
Querying CouchDB with Python
Looking inside the MMS Exchange (With call flow and PCAP)
Reverse MD5 on SIP Auth
NBN Skymuster Satellite Technical Overview
Kamailio Bytes – Working with Redis
List of Open Source Evolved Packet Core (EPC) Implementations
Kamailio Bytes – Dialplan Module
