Abstract
5G networks are expected to achieve Gigabit level throughput in future cellular networks. However,
it is a great challenge to treat the 5G wireless backhaul traffic in an effective way. In this paper,
we analyze the wireless backhaul traffic in two typical network architectures adopting small cell and
millimeter wave communication technologies. Furthermore, the energy efficiency of wireless backhaul
networks is compared for different network architectures and frequency bands. Numerical comparison
results provide some guidelines for deploying future 5G wireless backhaul networks in economical and
high energy efficiency ways.