1. Policy and Charging Application
  2. Online Charging DRA Overview
  3. Online Charging DRA Functions
  4. OCS Selection and Routing

OCS Selection and Routing

Gy/Ro session initiation request (for example, CCR-I) messages received from online charging clients to initiate credit-control sessions are load balanced across a collection of OCS servers connected to the PCA DSR that can serve the Diameter Request. Subsequent Gy/Ro CCR-U/T messages within the session are routed to the same OCS that served the CCR-I either by means of destination-host routing or by the stateful mechanism.

OC-DRA supports OCS Pool Selection modes for selecting the specific collection of OCS servers connected to the PCA DSR in which session initiation requests are to be load balanced across:
  • Single PCS Pool
  • Multiple OCS Pools

OCS Pool Selection modes are configurable using the NOAM Main Menu, and then Policy and Charging, and then Configuration, and then Online Charging DRA, and then Network-Wide Options, and then OCS Pool Selection Mode screen.

One-time Gy/Ro credit-control events received from online charging clients are handled in the same manner as session initiation request (CCR-I) messages and are load balanced across a collection of OCS servers connected to the DSR that can serve the Diameter request.