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ViLTE Testing



What is ViLTE?
ViLTE stands for video over LTE. It’s an extension of VoLTE, which enhances voice services with a high-quality video channel.

ViLTE is conversational – that is person-to-person – video service, based on the IP Multimedia Subsystem (IMS) core network. It has specific profiles for the control and media planes of the video service. Conversational video is also possible via EPC-integrated Wi-Fi – see VoWi-Fi.

To deploy ViLTE, Voice over LTE (VoLTE) is required. It is also advisable to combine ViLTE with RCS to provide the best service offering for consumers.


ViLTE, an acronym for “Video over LTE”, is a conversational (i.e. person to person) video service based on the IP Multimedia Subsystem (IMS) core network like VoLTE. It has specific profiles for the control and VoLTE of the video service and uses LTE as the radio access medium. The service as a whole is governed by the GSM Association in PRD IR.94.

It is vital that ViLTE video calls are allocated appropriate quality of service (QoS) to differentiate and prioritize this delay and jitter sensitive conversational traffic from other streaming video traffic that is not as delay or jitter sensitive. The mechanism used is called QoS Class Identifier (QCI).

To ensure that carrier traffic in LTE networks is appropriately handled, a mechanism is needed to classify the different types of carriers into different classes, with each class having appropriate QoS parameters for the traffic type. Examples of the QoS parameters include Guaranteed Bit Rate (GBR) or non-Guaranteed Bit Rate (non-GBR), Priority Handling, Packet Delay Budget and Packet Error Loss rate. This overall mechanism is called QCI.



IoTAS are able to execute ViLTE testing on the following networks:

• Telefonica Germany
• Telefonica Spain
• Telstra Australia

Please call IoTAS to discuss your ViLTE testing requirements and learn how we can help you achieve confidence and certification, if required, for your products. Call now on +44 1223 810010.