His research activities span multiple layers of distributed systems and network architectures and are often carried in collaboration with academia and industry (e.g., Ericsson, Samsung, CPQD, Padtec, RNP) around the world, leading to multiple open source networking projects (e.g., RouteFlow, libfluid, ofsoftswitch13, Mininet-WiFi) in the areas of SDN and NFV among other scientific results.
In 2020, Christian was included in the top-cited career-long impact scientists according to PLoS Biol 18(10).
Christian has contributed to 07 international patents, co-authored three books, and over 200 scientific publications, including top-tier scientific journals and networking conferences such as SIGCOMM and INFOCOM, altogether featuring 10 000+ citations (h-index: 30+, i10-index: 70+).