A look at how the HSS can update the profile of an already in-use subscription using Insert Subscriber Data Request/Response.
Category: RFCs & Standards
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.
How SR-IOV and DPDK play into faster performance of Virtual Network Functions (VNFs) for 3GPP core networks.
A look at the Confidentiality Algorithms used in 3GPP Networks, MILENAGE, XOR & Comp128
Categories
Cell Broadcast in LTE
A look at how Cell Broadcast is signalling implemented between the MME and CBC in an LTE/EPC network.
A look at the Network Function Repository Function (NRF) in 5G Core