Introduction
Diameter Routing Agent (DRA) is deployed between IPX and Mobility Management Entity (MMS) and
MMS and Home Subscriber Server (HSS) to convert the diameter packet in the S6a interface. A Diameter
Routing Agent (DRA) is a functional element in a 3G or 4G (such as LTE) network that provides real-time
routing capabilities to ensure that messages are routed among the correct elements in a network. The DRA
was introduced by the 3GPP to address the increased Diameter signaling traffic and growing complexity of
4G LTE networks.
Telogic's LTE Roaming Trigger Probe will detect the roaming traffic to provide roaming trigger. The
easiest is to deploy between DRA and IPX. However, due to the complexity of mapping MME code
(MMEC) and MME Group Identity (MMEGI) from the IPX to DRA interface, the tapping point has to be
between HSS and DRA as followed:
Tapping Point
The Service Provider will provide fibre split between HSS and DRA and send this traffic to the LTE
Roaming Trigger Probe. The Service Provider must ensure that only Diameter packet is sent to the Probe
to reduce the number packet to be decoded.
Decoding Support
Telogic's LTE Roaming Trigger Probe consists of CentOS Linux Servers that support:
- Location Update that will extract the following parameters:
- IMEI
- IMSI
- Timestamp
- MCC
- MNC
- MMEGI
- MMEC
- Location Cancel that will extract the following parameters:
- IMSI
- Timestamp
- MCC
- MNC
- MMEGI
- MMEC
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