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dsTest SLh Interface

dsTest supports both server emulation and client simulation with the SLh Diameter interface application to support Location Services (LCS) in the Evolved Packet Core (EPC). The SLh reference point is located between the (client) Gateway Mobile Location Center (GMLC) and the (server) Home Subscriber Server (HSS). With the SLh interface application, verify that the GMLC requests the routing information from the HSS, and that the HSS responds with the correct Mobility Management Entity (MME) identity for the subscriber specified. Location based services, such as Emergency Services, rely upon LCS.  LCS are also used to optimize network performance and enhance network self-optimization. Verify your end-to-end LCS solution with our SLh, SLs, and SLg interface applications.

Use the HSS Emulator and SLh Interface application in tandem to test Diameter Routing Agents (DRA), Proxies, Relay Agents, and Redirect Agents. dsTest provides more tools for Location Services EPC compliance testing.

ImplementationdsTest, Developing Solutions, LCS, Location Based Services, SLs, SLg, SLh, MME, GMLC, HSS, E-SMLC, Location Services, LCS Testing

  • Initiate a Routing Info Request

A complete set of events that can be generated with the SLh interface application 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.

HSS Testing (Client Simulation)

Verify your HSS location services operation by using the SLh simulation capabilities on a GMLC node. Use the GMLC SLg Interface Application to simulate a GMLC-MME LCS relationship to verify that the HSS correctly stores location information.

GMLC Testing (Server Emulation)

Use the SLh Interface Application and the dsTest HSS Emulator to test routing information exchange from your GMLC, when the identity of the MME is needed for a particular target UE whose location has been requested. In addition, you can verify that the GMLC successfully determines the correct serving node based upon the LCS response from the HSS, using the specified, preferred serving node.

Read more about our HSS Emulator.

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.

Operational Measurements

dsTest provides rich sets of measurements for the SLh interface:

  • 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 SLh measurements, Diameter measurements, and socket measurements.

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

 Supporting Standards