IMS (IP multimedia subsystem) is the enabler for VoLTE, SMS over IMS and new value-adding services.
Transmitting voice over LTE (VoLTE) with acceptable quality requires the right mechanisms and architectures in both the radio and the core network. This affects LTE networks as well as conventional 2G and 3G networks since LTE services will need to coexist with legacy networks until LTE coverage is ubiquitous. Another consideration is the mobility of voice subscribers, because a voice call that is initiated within LTE coverage must not be dropped when the subscriber moves out of LTE coverage into an existing 2G or 3G network.
When you develop an LTE device, you will need to test the following key areas: the functional aspects of your device (LTE attach, IMS registration, etc.), how well it performs in a noisy or faded environment, what IP traffic is taking place and how this affects battery life, and whether it can meet 3GPP and mobile network operator conformance requirements.
If you deploy VoLTE in your network, you will need to verify the coverage and real-world performance of your network. Test and measurement solutions from Rohde & Schwarz cover all aspects of voice and IMS testing, from R&D and production to network optimization.
Want to learn more?
