A Dual-Hop Backhaul Network Architecture for 5G Ultra-Small Cells Using Millimetre-Wave

This paper instigates a new network architecture for future 5G backhaul networks which can be used to achieve higher throughput capacity and better Quality of Service in high data traffic scenarios. This network is predominantly based on dual-hop wireless links which introduce an intermediate relay point between backhaul transceivers. To make this network a high capacity density wireless system, the base stations are densely deployed and equipped with highly directional antennas which use millimetre wave. It is shown that the overall performance can be improved by up to 45% by reducing the bottleneck and introducing routing diversity to such a dense dual-hop backhaul network. Moreover, it is shown how the performance of the dual-hop backhaul network can be modelled using the Erlang-B traffic distribution.