What is the challenge?
Certain Operators have sponsored/inter-standard roaming agreements with other Mobile Network Operators (MNO’s) who use a dual IMSI solution which employs the visited IMSI for roaming. Problem is that for data connections the other MNO end-user's mobile will use the APN’s known from the IMSI of the VPLMN while the APN should be used by his HPLMN of the other MNO. Today the mobile phone tries to setup a data connection to GGSN/PGW of the VPLMN instead of GGSN/PGW of the other MNO.
There is no ideal solution available to solve this issue. The idea is to address this in the network via manipulation on a so called GPRS Tunneling Protocol proxy (GTP proxy). Until now there wasn't a commercial off the shelf product available.
Our GTP Proxy Solution
Our solution acts as a GTP proxy meaning that for GTPv1 and GTPv2 control-plane traffic Infradata's solution terminates the GTP tunnel and analyses the IMSI. In case the IMSI from the other MNO are recognized by checking a configuration table holding IMSI sub-ranges then Infradata opens a new GTP tunnel and sends the request to the known Gateway GPRS Support Node/Packet Gateway (GGSN/PGW) of the real Home MNO and potentially also manipulates the APN name inside the request so it can access the known APN on the own Home MNO's GGSN/PGW. The configuration table is easy configurable by the VPLMN engineers.
We power the most innovative platforms for the telecom ecosystem. Infradata is committed to cloud-native applications and services across our end-to-end portfolio to deliver the networks of the future.
Equipment Identity Register
The Next Generation EIR solution. EIR provides a Next Generation EIR enabling a single, unified access point for Mobile Equipment authentication in the network.
Signaling Transfer Point (STP)
The STP runs on any off-the-shelf hardware or in a virtualized environment. It is a 100% software based solution, supporting virtualization and cloud deployment (VMWare, KVM, OpenStack etc.).
Diameter Signaling Controller (DSC-DRA-DEA-IWF)
Diameter routing, any-to-any interworking, mediation, protocol conversion, load balancing and advanced service logic for a wide range of protocols.