Conclusion.
5G networks are expected to satisfy rapid wireless traffic growth. Massive MIMO, millimeter wave communications, and small cell technologies are presented to achieve gigabit transmission rates in 5G networks. In this article, we study how to promote 5G wireless backhaul networks in high throughput and low energy consumption ways. Two typical small cell scenarios are configured to analyze the wireless backhaul traffic in future 5G networks. Furthermore, the energy efficiency of wireless backhaul networks is compared in two typical small cell scenarios. Numerical results imply that the distribution solution has higher energy efficiency than the central solution in 5G wireless backhual networks. However, a veritable challenge would indeed emerge if the new distribution network architecture is adopted in future 5G wireless backhaul networks.