Diameter and SIP: Registration-Termination-Request / Answer
Nick These posts focus on the use of Diameter and SIP in an IMS / VoLTE context, however these practices can be equally applied to other networks. The Registration-Termination Request /…
LTE
Diameter and SIP: User-Authorization-Request/Answer
The Diameter User-Authorization-Request and User-Authorization-Answer commands are used as the first line of authorization of a user and to determine which Serving-CSCF to forward a request to.
Diameter and SIP: Server-Assignment-Request/Answer
These posts focus on the use of Diameter and SIP in an IMS / VoLTE context, however these practices can be equally applied to other networks. The Server-Assignment-Request/Answer commands are…
Diameter and SIP: Location-Info-Request / Answer
These posts focus on the use of Diameter and SIP in an IMS / VoLTE context, however these practices can be equally applied to other networks. The Location-Information-Request/Answer commands are…
Diameter and SIP: Multimedia-Authentication-Request/Answer
These posts focus on the use of Diameter and SIP in an IMS / VoLTE context, however these practices can be equally applied to other networks. The Multimedia-Authentication-Request/Answer commands are…
Connecting any 3rd Party HSS to Open5GS MME
Connecting an external / 3rd party HSS to Open5GS
srsLTE Install for BladeRF & LimeSDR on Debian / Ubuntu
Note: I’m running version 19.12.0 which I installed from the repos due to issues with 20.4.0 (latest when I wrote this) and stability on LimeSDR. I wrote the other day…
Sending SMS in Open5GS LTE Networks using the SGs Interface and OsmoMSC with SMSoS
Sending SMS over LTE using OsmoMSC and OsmoHLR and the SGs interface for SMSoS
OsmoMSC and Open5GS MME – SGs Interface for InterRAT Handover & SMS
Looking into the SGi interface for Circuit Switched Fallback in LTE to use GSM/UMTS networks for Calls & SMS
Working with LTE MAC traces in Wireshark
Using Wireshark to view and analyze MAC layer LTE traffic
Field Test on an iPhone
Accessing the Field Testing suite on an iOS Device
Kamailio Proxy-CSCF Pull
My first Pull / Merge in the Kamailio project was to fix the IMS P-CSCF config
Open5GS Python Library / API
A while ago I wrote a Python library for interfacing Open5GS HSS to Python. The Open5GS HSS uses a MongoDB backend, so the library is just running formatted Mongo queries.…
Multi Operator Core-Networks (MOCN) for RAN Sharing
Multi-tenancy on the RAN side of the network, allowing an eNB to broadcast multiple PLMN IDs (MCC/MNC) in the System Information Block (SIB).
Ansible for Scaling and Deployment of Evolved Packet Core NEs
Using Ansible to orchestrate EPC Network Elements
GTPv2 – F-TEID Interface Types
A quick look at the Interface Types in the F-TIED field in GTPv2
Things I wish I knew about setting up private VoLTE Networks
Lessons learned about setting up VoLTE / IMS Networks at small scale.
BaiCells Neutrino eNB Setup
Configuring BaiCells Neutrino eNB
VoLTE / IMS – P-CSCF Assignment
How the P-CSCF address is assigned to a UE in Protocol Configuration Options (PCO) during bearer establishment.
SRS LTE – Software Defined LTE Stack with BladeRF x40
Using SRS LTE Stack with the BladeRF x40 Software Defined Radio (SDR)