Diameter Answer Message Processing

After the Policy DRA routes a Diameter Request message to a selected PCRF, and updates the SBR on binding status, the Policy DRA could find itself in one of several situations:

1. An Answer is received from a PCRF and a response is received from a Policy SBR
2. An Answer is received from a PCRF, but no response is received from a Policy SBR after a configured time interval
3. A response is received from an SBR, but no Answer is received after a configured time interval

For situations 1 and 2, the Policy DRA always forwards the Answer messages to the corresponding Requests initiators through the Diameter Routing Function, with or without Topology Hiding processing depending on the Topology Hiding status of the Policy Client.

For situation 3, the Policy DRA generates Diameter Answer messages with proper Error Codes and routes the Answers to the Request initiators through the Diameter Routing Function, with or without Topology Hiding processing depending on the Topology Hiding status of the Policy Client.