Categories
EPC LTE Mobile Networks RFCs & Standards

Diameter Droplets – The Flow-Description AVP and IPFilterRules

Getting to know IPfilterRules and the Flow-Description AVP

Categories
EPC GSM LTE Mobile Networks RFCs & Standards

The Surprisingly Complicated world of MO SMS in IMS/VoLTE

Since the beginning of time, SIP has used the 2xx responses to confirm all went OK. If you thought sending an SMS in a VoLTE/IMS network would see a 2xx OK response and then that’s the end of it, you’d be wrong. So let’s take a look into sending SMS over VoLTE/IMS networks! So our […]

Categories
5G SA EPC LTE Mobile Networks Software

Open5Gs Database Schema Change

As Open5Gs has introduced network slicing, which led to a change in the database used, Alas many users had subscribers provisioned in the old DB schema and no way to migrate the SDM data between the old and new schema, If you’ve created subscribers on the old schema, and now after the updates your Subscriber […]

Categories
EPC Kamailio LTE Mobile Networks Software

A very unstable Diameter Routing Agent (DRA) with Kamailio

I’d been trying for some time to get Kamailio acting as a Diameter Routing Agent with mixed success, and eventually got it working, after a few changes to the codebase of the ims_diameter_server module. It is rather unstable, in that if it fails to dispatch to a Diameter peer, the whole thing comes crumbling down, […]

Categories
EPC LTE Mobile Networks Python Software

PyHSS Update – YAML Config Files

Introducing YAML based config files for defining how PyHSS should be setup

Categories
EPC LTE RFCs & Standards

MSISDN Encoding in Diameter AVPs – Brought to you by the letter F

Peculiar padding problem perplexes poor programmer.

Categories
EPC LTE Mobile Networks Python

PyHSS Update – SCTP Support

Info on PyHSS new support for SCTP as well as TCP.

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 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
EPC Mobile Networks RFCs & Standards Software

Getting the GTP-U Packets flowing Fast – DPDK & SR-IOV

How SR-IOV and DPDK play into faster performance of Virtual Network Functions (VNFs) for 3GPP core networks.

Categories
EPC EUTRAN LTE Mobile Networks RFCs & Standards

Cell Broadcast in LTE

A look at how Cell Broadcast is signalling implemented between the MME and CBC in an LTE/EPC network.

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
EPC LTE Mobile Networks

LTE EPC: Packet Gateway (P-GW) Basic Function

The Packet Gateway’s purpose in the EPC.

Categories
EPC LTE Mobile Networks

LTE EPC: Serving Gateway (S-GW) Basic Function

Basic processes and functions of the LTE EPC Serving Gateway (S-GW).

Categories
EPC LTE Mobile Networks

Open5GS EPC: Static IP Addresses for UEs / APNs / Subscribers

Assigning static IPs to UEs in Open5GS

Categories
5G SA EPC LTE Mobile Networks

CUPS – Control and User Plane Separation in LTE & NR with PFCP (Sx & N4)

A look at PFCP for the Sx and N4 Interfaces

Categories
EPC Mobile Networks

Wireshark Filtering S1AP to find Subscriber Signaling

Using Wireshark to filter S1 messaging to find signalling from a specific subscriber,

Categories
EPC LTE Mobile Networks Software

List of Open Source Evolved Packet Core (EPC) Implementations

List of Open Source Evolved Packet Core implementations

Categories
EPC GSM LTE Mobile Networks Uncategorized

Getting TIED up with GTP Tunnels

What’s the deal with Tunnel Endpoint Identifiers and what do they do?