Cameron said the initiative was one of three areas he wanted Britain and Germany to collaborate on to "pool ideas, share data, innovate and to lead on the next big ideas" in what he dubbed "a world on fast forward".
The future fifth-generation, or 5G, network will enable a full-length film to be downloaded on the Internet in one second, Cameron said at the official CeBIT inauguration in the northern city of Hanover, attended also by Chancellor Angela Merkel.
"This is a prize that researchers all over the world are going for," he said, unveiling the new collaboration between Germany's Dresden University and Britain's King's College University in London and the University of Surrey.
Britain is the CeBIT's partner country this year at the five-day event, focused on the theme of "datability": the ability to use vast amounts of data quickly and responsibly.
Amid global debate about data security following revelations of mass US and British online snooping, a key CeBIT theme this year is how