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SGd/Gdd Interface

dsTest, Developing Dolutions, SGd Interface, CIoT, GMSC, MME, SGSN, SMS, C-SGN, CSGN

dsTest, Developing Solutions, Gdd Interface, SMS, GMSC, SGSN, MME, CIoT, C-SGN, CSGN

dsTest supports both server emulation and client interface simulator capabilities for the 3GPP LTE SGd/Gdd Diameter interface.   Use our SGd/Gdd Interface application on our simulated MME or SGSN nodes to test the capacity and performance of a GMSC.  Use our GMSC Emulator with the SGd/Gdd interface application ot test your MME and/or SGSN.  Customize SGd/Gdd messages using our SmartAVP feature.  If you are testing CIoT/NB-IoT, dsTest can surround a CIoT Signaling Gateway Node (C-SGN) with all the interfaces needed to verify the MME, SGW, and PGW functions required of the C-SGN.   SGd/Gdd is specified in 3GPP TS 29.338.

Comprehensive sets of Operational Measurements for the SGd/Gdd Interfaces, Diameter, and socket level are collected at user-specified 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.


The SGd/Gdd application implements the following 3GPP procedures:

A complete set of events that can be generated with the SGd/Gdd interface can be found here.

MME/SGSN Testing (Server Emulation)

The GMSC server emulator initiates the appropriate procedure when appropriate, eliminating the need to dedicate a production server to lab activities.  You can manually trigger server-initiated procedures such as Alert Service Center by executing a event chain with a run-time command or during an automated test.

Read more about our GMSC Emulator.

GMSC Testing (Client Simulation)

Our SGd/Gdd Interface application simulates a MME/SGSN SGd/Gdd interface to determine the processing capacity and performance of a GMSC.  The SGd/Gdd Interface application allows users to validate GMSC 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 using our SmartEvents feature to trigger GMSC-initiated procedures.

Multiple GMSC nodes can be instantiated on a single server, each with scalable subscriber loads and transaction rates. In this mode the SGd/Gdd interfaces of up to 1000 independent GMSC nodes may be simultaneously simulated.  The nodes are fully independent and their subscriber configurations may also be independent, overlap, or be duplicated.

Supporting Standards

  • Technical realization of the Short Message Service (SMS) – 3GPP TS 23.040
  • SGd/Gdd – TS 29.338
  • Diameter – RFC 6733
  • TCP – RFC 793
  • SCTP – RFC 4960

General Reference Guides

Read more about dsTest.