Providing broadband wireless communications to a majority of European citizens is a major objective of the EC at the horizon of 2020. With a current annual growth rate in the range of 70%, the mobile data traffic of smartphones, tablets, machine-to-machine and other portable devices dramatically challenges the 4G wireless cellular network currently under deployment. To sustain this growth, high data-rate millimetre-wave (mmW) technologies, that demonstrate striking capabilities for short- and medium-range wireless communications, can bring a tremendous performance improvement.MiWaveS will develop the key technologies for the implementation of mmW wireless access and backhaul in future 5th Generation heterogeneous cellular mobile networks, taking advantage of the wide unlicensed or light-licensed frequency bands available to allow flexible spectrum usage as well as peak capacities above 10 Gbit/s aggregated throughput, well beyond the LTE-Advanced system. Installed in dense urban environments, miniature mmW small-cell access-points connected to the cellular network through optical fibre or mmW wireless backhaul will support massive data exchanges for mobile users with low latency, low interferences, high QoS and low power consumption per bit. They will also contribute to a reduced exposure of the public to electromagnetic fields (EMF) thanks to lower transmitted power and reduced skin penetration at mmW, steerable directive antennas focusing the signals in the directions of interest, and reduced data traffic through the lower frequency legacy base-stations.To lead this research in Europe, the MiWaveS consortium groups major network operators, equipment/component providers, OEMs, research institutes and academic institutions with world-known expertise in the relevant areas for designing and demonstrating heterogeneous cellular networks with mmW access and backhaul.