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dsTest, Developing Solutions, Rx Interface, PCRF Testing, CSCF Testing, IMS Testing

dsTest supports PCRF emulation and CSCF simulation capabilities for the 3GPP Diameter Rx interface.  Test Call Session Control Function (CSCF) Application Function (AF) Rx interfaces in the IMS with our Policy Control and Charging Rules Function (PCRF) Emulator.  Use the CSCF simulation in the Rx Interface application to test the capacity and performance of a PCRF in 4G and LTE networks.  Test VoLTE  and Policy and Charging Control (PCC)  interactions by using the Rx Interface Application with other  dsTest  Interface Applications such as Gx.  Use the PCRF Emulator and Rx Interface application in tandem to test Diameter Routing Agents (DRA), Proxies, Relay Agents, and Redirect Agents.  dsTest provides more tools for IMS Testing.

Comprehensive sets of operational measurements for the Rx Interface, Diameter, and socket level are collected at configurable intervals and stored in a SQLite database on the dsTest server.  Real-time measurements may be retrieved through our dsClient CLI interface or graphed via our dsClient GUI interface.

Read more about Testing Policy Management.


The Rx application implements the following procedures:

  • Initial provisioning of session information
  • Modification of session information
  • AF session termination
  • Subscription to notification of signalling path status
  • IP-CAN session termination
  • Service data flow deactivation
  • IP-CAN type change notification
  • Access network charging information notification

A complete set of events that can be generated with the Rx interface application can be found here, and our Diameter Dictionary can be used to construct, test, validate, and interpret the results of your Diameter testing.

CSCF Testing (Server Emulation)

The PCRF Emulator executes procedures based on configurable subscriber profiles and PCC rules, responding to requests from CSCFs and eliminating the need to dedicate a production server to lab activities.  You can execute a test event chain with a run-time command or during dsTest, Developing Solutions, Rx Interface, Diameter, PCRF Testing, CSCF Testing, IMS Testing, Server Emulationan automated test to simulate subscriber session termination, service flow deactivation, loss of signaling, or other bearer events for which the CSCF subscribed.

When the Gx interface is also present, the PCRF emulator supports session binding and IMS-initiated dedicated bearer activation, and provides end-to-end policy control between the core network and the IMS, incorporating the Media Content Descriptions received from the CSCF into PCC rule formulation.

The PCRF Emulator provides policy and charging control services for the Rx interface—all of the functionality required by an AF, and you can reconfigure your subscriber database in seconds rather than hours by simply loading a new configuration file.  You can also use the control interface to change the emulator’s behavior. Simulate a non-responsive server by pausing the emulator or simulate intermittent issues by pausing and resuming.  You can modify subscriber profiles during run time, simulating administrative policy or subscription changes in active sessions.

Multiple PCRF Emulators can be instantiated on a single server.  In this mode each emulator can support multiple interfaces, up to an aggregate of 1000 client connections across all emulators.  The emulators are fully independent and their subscriber databases may also be independent, overlap, or be duplicated.

Read more about our PCRF Emulator.

PCRF Testing (Client Simulation)

The Rx Interface application can be used to simulate CSCFs to test the PCRF.  The Rx Interface application, in conjunction with the Gx, Gxx and other dsTest interface applications, allow users to fully validate PCRF performance and capacity in a realistic network environment, replicating the deployment configuration.

Execute timed chains of test events with a run-time command or during an automated test to trigger client-initiated procedures.dsTest, Developing Solutions, Rx Client Simulation, CSCF Testing, IMS Testing, PCRF Testing

  • Start and stop specified subscriber sessions, simulating subscriber IMS activity
  • Subscribe to notification of loss of signal path status events from the PCRF and cancel previous subscriptions
  • Notify the PCRF that CSCF session information has changed

Multiple CSCF nodes can be instantiated on a single server, each with scalable subscriber loads and transaction rates. In this mode, up to 1000 independent nodes may be simultaneously simulated.  The nodes are fully independent and their subscriber configurations may also be independent, overlap, or be duplicated.  In this manner, roaming scenarios can be simulated, and the capacity and performance of Diameter agents can be tested.

Read more about Testing Policy Management.
Read more about our Capacity and Performance.

Advanced Testing Features

Enhance your testing with Developing Solutions advanced testing features:

  • Insert, delete, or replace AVPs in your messages with our SmartAVP solution.  SmartAVP enables you to define proprietary signaling or to corrupt AVPs to facilitate negative testing.
  • Configure commands to define the series of actions and rates that each subscriber takes. Advanced profiles can be created using SmartEvents to define a mix of traffic based on probability assignments.  With SmartEvents, you can specify when your SmartAVPs are used.
  • Define a set of message templates against which all messages will be validated with our Diameter Dictionary. Every Diameter message is validated, even under load conditions.

Read more about our SmartEvents feature.
Read more about our Advanced Diameter Testing Features.

Supporting Standards