dsTest supports server emulation and client simulation capabilities for the 3GPP Diameter Rf/Gz interface. Test PDN Gateway (PGW) interfaces and IMS Call Session Control Function (CSCF) interfaces in 4G and LTE networks with our Offline Charging System (OFCS) Emulator. Use the Charging Triggering Function (CTF) simulation in the Rf Interface application to test the capacity and performance of an OFCS. Test VoLTE and PCC interactions by using the Rf/Gz Interface Application with other dsTest Interface Applications such as Gx, Rx, Ro, and S6. Use the OFCS Emulator and the Rf Interface application in tandem to test Diameter Routing Agents (DRA), Proxies, Relay Agents, and Redirect Agents. dsTest provides more tools for LTE testing. The Rf/Gz interfaces are specified in 3GPP TS 32.240, TS 32.251 and TS 32.299.
The Rf Interface application supports the following charging scenarios:
- Event Based Charging
- Session Based Charging
A complete set of events that can be generated with the Rf 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.
The OFCS emulator handles offline charging procedures based on configurable subscriber profiles responding to charging events from CTFs and eliminating the need to dedicate a production OFCS to lab activities.
OFCS Testing (Client Simulation)
The Rf Interface application can be used to simulate a PGW’s or CSCF’s CTF functionality to determine the impact of new charging strategies or OFCS features and standards before they are deployed in a network. The Rf Interface application allows a user to validate OFCS performance and capacity in a realistic network environment, replicating the deployment configuration. The CTF can simulate the following Diameter Accounting actions to the OFCS:
Advanced Testing Features
SmartEvents — Alter application behavior or coordinate multiple interface applications with SmartEvents. Our programmable, subscriber-level state machine gives you the ability to define handlers for specified application events that can then cause an event in another application to be executed. You can also configure handlers to modify subscriber information during run-time, introduce timers, or randomize subscriber behavior based on configurable probabilities to name a few of the many options in one of dsTest’s most powerful features.
SmartMessageElement — Insert, delete, or replace elements in Diameter, RADIUS, MAP, LDAP, GTP, REST, or SOAP messages with our SmartMessageElement solution. Define proprietary signaling or corrupt elements to facilitate negative testing. You can specify when your elements are used with SmartEvents.
Traffic Profile — Draw the shape of your test actions across time with Traffic Profile. You can define the rate for any action as a static rate or reference a Traffic Profile configuration, which also means that multiple Traffic Profiles can be running currently. Use Traffic Profile in conjunction with the randomizing features in SmartEvents to design a test that more truly simulates real-world network activity.
Diameter Dictionary — Define a set of message templates against which all messages will be validated with our Diameter Dictionary. Whether you’re load testing or testing functionality all messages are validated.
dsTest provides rich sets of measurements for the Rf/Gz Interface application:
- Transaction and transport layer attempts, successes, and failures
- Transaction duration, transactions-per-second, and round-trip delay
- Message and byte counters
- Errors encountered and error indications received in messages
You can read more about the reporting features offered with dsTest and dsClient here.