[RADIATOR] Radiator SIM Pack 2.10 released

Heikki Vatiainen hvn at open.com.au
Mon Dec 29 14:16:32 UTC 2025


We are pleased to announce the release of Radiator SIM Pack version 
2.10. Radiator SIM Pack is a feature rich 3GPP AAA solution from 
Radiator Software for Wi-Fi offloading, Wi-Fi Calling (VoWi-Fi) and 
other SIM based authentication use cases.

The new release showcases the extensive development work supporting 
complex real-life operator deployments, including scenarios where end 
users from multiple MNOs each require a specific approach. We have also 
made the operational side easier with improved Diameter peering and 
enhanced tracing and debugging, all based on actual customer 
requirements and projects.


Add support for Diameter S6a/S6d authentication and location update

Operators that prefer using Diameter S6a/S6d interface for Wi-Fi offload 
authentication with EAP-SIM, EAP-AKA or EAP-AKA’ can now configure 
Radiator to act as a SGSN. With S6a/S6d configuration Radiator uses the 
S6d to fetch authentication information and does location update with S6a.

Location update is needed to retrieve the end user’s IMSI and profile 
information which allows authorisation based on, for example, APN 
configuration. Radiator makes this information available for custom 
authorisation.


Enhance Diameter SWx for fetching profile information

Similar to S6a/S6d authentication and location update, Diameter SWx can 
now be used to do both authentication and location management. Location 
management supports options for full IMSI registration or simpler 
profile retrieval. Both S6a/S6d and SWx support similar authentication 
and authorisation.


Interoperability enhancements

Deployments with different operators have resulted in a number of 
enhancements to better interoperability with Diameter and SIGTRAN/GSM 
MAP authentication services.

For example, when location information needs to be purged, the request 
is now sent to the HLR or HSS that replied to the initial location 
update. Even if this is not required, it reduces the work needed by the 
authentication services and makes tracing and debugging easier on the 
operator side.

With VoWiFi, the authentication and authorisation is also now done with 
the same HSS for the IMSI in question. While not strictly required, it 
helps with tracing and debugging.


Easier high availability with Wi-Fi offloading

Wi-Fi offloading EAP-SIM, EAP-AKA and EAP-AKA’ can now be directly 
configured to use multiple Diameter peers. Multiple peerings can be used 
with fail-over or load balancing algorithms.


Dynamic configuration with Wi-Fi offload

When Radiator is configured to authenticate EAP-SIM, EAP-AKA or EAP-AKA’ 
Wi-Fi users that have SIM cards from multiple operators, the operator 
specific parameters, such as Diameter or SIGTRAN/GSM MAP authentication 
servers can be dynamically set from a database. For example, IMSIs can 
be mapped to Diameter Destination-Realm values, selection between GSM 
MAP and Diameter can be done per-request basis and location update can 
be enabled or disabled as required.

Other possibilities include choosing authentication parameters for a 
single operator based on the IMSI ranges. In case the operator IMSIs are 
numbered so that the parameters are different for each range, Radiator 
can adjust the authentication and location update requests based on this 
information.


Where can I get it?

For customers with an active support contract for Radiator SIM Pack, the 
2.10 release is now available at the Radiator downloads page: 
https://radiatorsoftware.com/downloads/

A full list of changes can be found here: 
https://radiatorsoftware.com/revision-history/radiator-sim-pack/


Would you like to know more?

If you want to find out how Radiator SIM Pack (and other Radiator 
solutions) can help your business, please contact the Radiator team at 
info(a)radiatorsoftware.com – we are happy to learn more about your use 
case and assist you!



-- 
Heikki Vatiainen
Radiator Software, makers of Radiator
Visit radiatorsoftware.com for Radiator AAA server software



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