Phone: (469) 634-4200

dsTest, Developing Solutions, Control and User Plane Separation, Sxa Interface, Sxb Interface, Sxc Interface

dsTest supports the following Packet Forwarding and Control Protocol (PFCP) interfaces between the control plane functions and the user plane functions (UPF):

  • Sxa – SGW Control to User Plane
  • Sxb – PGW Control to User Plane
  • Sxc – TDF Control to User Plane

dsTest supports the testing of these PFCP interfaces with our UPF node and control nodes such as the SMF.

PFCP is specified in 3GPP TS 23.214 and the interfaces are specified in 3GPP TS 29.244.


dsTest implements the following events on the Sxx interfaces:

  • Establish a Session
  • Delete a Session
  • Receive a Session Modification Requests with rules to be added, updated, or deleted
  • Session Report Response
  • Add Rule
  • Update Rule
  • Delete Rule

A complete set of events that can be generated by these interface applications can be found here.

As with all dsTest products, the node configurations and test scenarios are easily defined and configured with XML files that are validated against a published XML Schema to avoid invalid definitions. With our dsClient GUI, you can create, run, and archive tests, capture, graph and archive operational measurements, capture real-time data flows, and manage your dsTest servers and testing scenarios with a standalone application that runs on your PC.

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.

Operational Measurements

dsTest provides rich sets of measurements for the Sxx interfaces:

  • 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

See our Online Help for PFCP measurements, control socket measurements, and user socket measurements.

You can read more about the reporting features offered with dsTest and dsClient here.

Supporting StandardsdsTest, Developing Solutions, Sxa Interface, Sxb Interface, Sxc Interface, PFCP, CUPS