Design and Optimization considerations for real-time video conferencing using IMS in 4G/LTE Networks

IP Multimedia Subsystem (IMS) offers a plethora of functionalities in 4G/LTE networks. One such functionality is the video conference where three or more User Equipments (UEs) communicate with each other using VoLTE. This research paper presents optimizations in the design and implementation of an IMS video conference server for reducing the video display delay and improving the performance thereof. Both application as well as network level parameters are found to impact the video display delay at the UE, hence performance improvement of both are considered in this paper. Optimization techniques adopted in this implementation resulted in enhanced performance of video conference calls over the LTE network.