Efficient protocol design for device-to-device communication in ultra dense networks

Focused on the requirement of Gigabit level throughput of 5G networks, two typical backhaul solutions in ultra-dense networks architectures are investigated. Moreover, an efficient protocol scheme was designed for device-to-device communication in ultra-dense networks on the basis of the two backhaul network architectures. The different devices can implement communication directly through multi-hop relay without macro base stations forwarding. Additionally, according to the characteristics of millimeter-wave coverage in ultra-dense networks, the paper presents the millimeter-wave dynamic bandwidth improvement mechanism of multi-user communication. Simulation results show that the effectiveness of the proposed scheme and correctness of the protocol analysis compared with the traditional mechanism, which can be seen that the proposed scheme improve the bit error rate (BER) performance effectively.