Automated Testing Solutions for LTE, VoLTE, and IMS Networks

Welcome to the latest issue of GL's Newsletter, providing insight into our comprehensive testing solutions for LTE, VoLTE, and IMS networks, enabling telecom providers to ensure the quality and reliability of their network services.

LTE, VoLTE, and IMS Networks


Wireless networks are subject to interference, signal strength degradation, severe weather, faulty or overloaded equipment and other harmful factors. These issues lead to the deterioration of voice and data quality. GL's automated testing solutions for LTE, VoLTE, and IMS networks offer a comprehensive solution for monitoring, emulating, and troubleshooting problems within LTE IMS wireless networks.

GL's LTE IMS Test Tool captures, decodes and conducts measurements across various interfaces in LTE and IMS wireless networks. GL’s Message Automation and Protocol Simulation (MAPS™), a multi-protocol and multi-interface emulation software, can emulate nearly all elements in wireless 5G, and 4G VoLTE networks. When used in conjunction with the High-Density LTE Network Emulator, it can generate up to 100,000 UEs along with a high volume of mobile GTP and packet traffic to perform load testing on core LTE networks.

Users can establish a virtual real-time network with GL’s End-to-End 4G LTE-IMS Network Emulation Test Suite that emulates components such as Evolved NodeB (eNodeB), Mobility Management Entity (MME), Serving Gateway, PDN Gateway, Home Subscriber Server (HSS), Serving GPRS (General Packet Radio Service) Support Node (SGSN), Policy and Charging Rules Function (PCRF), Policy and Charging Enforcement Function (PCEF), Application Function (AF) and others to emulate Evolved Packet Core (EPC), allowing complete testing of the LTE network.

All functionalities conform to industry standards. The End-to-End 4G LTE-IMS network emulation test suite offers reliable integrated solutions to vendors and service providers for emulating, monitoring and troubleshooting wireless networks.

LTE IMS Network Test Solutions Comprise:

  • 4G LTE Communications Network Lab
  • Emulate IMS Interfaces
  • Centralized Web-based LTE Monitoring System
  • LTE/5G Quality of Service (QoS) Test Suite for Voice, Video, and Data Quality Testing
  • Massive LTE UE and Traffic Emulation
  • Emulate LTE S1 Interface
  • Emulate LTE eGTP Interfaces (S3, S4, S5, S8, S10, S11 and S16)
  • Emulate LTE X2 AP Interface
  • Emulate SMS and CS Fallback

LTE IMS Network Test

End-to-end voice, video, and data quality testing includes speech metrics like PESQ and POLQA. When combined with other metrics such as delay, packet loss, drops, and more, it accurately assesses the true performance of VoLTE.

MAPS™, supports the testing of all elements within the LTE IMS wireless infrastructure. It enables the emulation of various interfaces in LTE (S1-u, S1-MME, X2, S3, S4, S5/S8, S6a, S10, S11, S13, S16) and IMS (Cx/Dx, Rx, Gx, Gm, SGi, Mw, Mi, Mj) interfaces using LTE S1, LTE eGTP, Diameter, and IMS emulators. This capability allows for VoLTE call simulation in a controlled lab environment, enabling the study of network behavior.

GL’s all IP monitoring and analysis probe, PacketScan™, in combination with the network surveillance system - NetSurveyorWeb™, enables centralized monitoring of the entire LTE IMS network. Used in conjunction with LTE Protocol Analyzer and IMS Protocol Analyzer probes, these systems feed data to a centralized database (Oracle) in real-time for further analysis. These probes capture, decode, and categorize traffic into calls and forward call detail records, signaling frame details, and other statistics to the centralized database server.

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