GCF IMS Field Trials

VoLTE Testing

 

An extensive set of tests need to be run by a terminal supporting VoLTE to obtain GCF approval. These tests are specified within GCF-CC Annex F5.2 and the test procedures are detailed in Section 51 of GSMA TS.11 Device Field and Lab Test Guidelines. IoTAS have experienced Engineers in multiple locations and can offer a full GCF F5.2 VoLTE test solution for network-configuration dependent (VoLTE), including all supported SRVCC scenarios, and client-to-client (VoC2C) testing.

 

IoTAS VoLTE Test Plan

 

Having completed a large number of GCF VoLTE projects, IoTAS have found some aspects of the GCF F5.2 plan could be enhanced, while IoTAS work to do that, IoTAS have developed our own VoLTE solution which goes beyond the requirements of the tests included in the GCF-CC F5.2 by testing additional aspects of VoLTE functionality to ensure better device compliance to GSMA IR.9x documents.

 

Examples of the areas these additional tests cover are;

 

Performance (KPI)

• VoLTE Call Setup KPI (MO & MT)
• VoLTE Call Stability KPI
• SRVCC Success Rate KPI (multiple repetitions covering multiple scenarios)
• Default EPS Bearer Performance during VoLTE Call over Dedicated EPS Bearer KPI

 

Functionality

• VoLTE to UTRAN SRVCC*
• VoLTE to GERAN SRVCC*
• Voice and Data interworking
• Multiple types of MO & MT call scenarios
• Multiple types of SMS & MMS scenarios
• Supplementary Services*
• SRVCC with Supplementary Services*
• Out Of Coverage
• Emergency Calls (live N/W – UK and Australia Only)
• Interworking with Wifi

* Multiple scenarios not covered in GCF-CC F5.2 are tested

 

In addition to providing a first class testing solution to device manufacturers, IoTAS work with FTQO Networks. Some of this work is testing hand in hand to find test locations, or to capture logs and confirm undesirable behavior that the network wishes to investigate.

IoTAS also feed back some of our own internal benchmarking test results and observation which provide the network with additional information which can help the network improve its VoLTE deployment and VoLTE knowledge base which aids the industry as a whole.

VoWiFi Testing

 

IoTAS offers a full VoWiFi testing solution to ensure your product complies with all of the criteria outlined by the Global Certification Forum (GCF).  We have experienced Engineers in location ready to meet your testing needs. IoTAS have successfully completed VoWiFi testing on EE UK, Vodafone UK and Deutsche Telekom. IoTAS are capable of capturing and analysing both protocol and IMS logs, for test case validation, defect investigation and performance analysis.

With an extensive range of Access Points (AP) IoTAS are able to give comparable results against a device of your choosing. Testing against multiple AP’s ensures interoperability between WiFi vendors and cellular chip sets.

IoTAS have also developed our own VoWiFi solution which is scalable to meet your needs and ensure the stability of your device including examples such as:

• VoLTE <-> VoWiFi handovers
• VoWiFi <-> CS mobility
• VoWiFi Access Point handling
• Supplementary services using XCAP and SIP