Department of Electronic Media: System Theory and Technology
During the past years, we have placed the emphasis of our research activities on the convergence of (wireless) broadcast and broadband networks.
In this regard, a current development within 3GPP has taken place with Release 14 (March 2017). Further evolved Multimedia Broadcast Multicast Service (FeMBMS) is the successor to the first LTE broadcast concepts and allows the usage of an LTE carrier for dedicated broadcast. Our system “Tower Overlay over LTE-A+” (TOoL+) has contributed immensely to these enhancements. Its aim is to offload popular content from cellular broadband networks by integrating broadcast infrastructures, while also reducing energy consumption and network costs. Due to the adaption of the TOoL+ concepts, a transmitter and receiver prototype for FeMBMS could be implemented in a timely manner. At present, several field trials for FeMBMS using the IfN components are taking place in Europe, others are being planned. With the experience in TOoL+ and FeMBMS, current research is taking place in the area of 5G broadcast. New developments in 5G will be brought together in the topic “Tower Overlay over 5G NR” (TOo5G).
In the research area of transmission standards for digital radio, a researcher is engaged in the local service insertion in single frequency networks for DAB+.
Furthermore, one staff member has conducted research on how to increase the data rate available in cable networks. For this, he has enhanced the existing standards by concepts discussed during the development of 5G.
A flagship of our research is the Software Defined Radio Toolkit developed at IfN. Its extensive software library enables the flexible implementation of state-of-the-art transmission technologies.
One staff member has been working in the field of Visible Light Communication (VLC). Within the scope of these works, a research demonstrator has been developed that is enhanced continuously.