Figure 2-2
illustrates the steps of the diameter EIR call flow process.
- MME/SGSN sends the ECR
message to DAMP over S13/S13' interface links.
- DAMP queries the UDR active
and standby NOAMs in a round-robin manner for IMEI data. DAMP uses the ComAgent
StackEvent request for querying the UDR DB.
- UDR NOAM looks up the IMEI
DB and sends a response to the DAMP. The response to DAMP is sent as a ComAgent
StackEvent response.
- EIR on DAMP receives the
response from UDR; applies the business logic on received ComAgent StackEvent
response; creates an ECA message; and encodes it to send to MME.