Gbps User Rates Using mmWave Relayed Backhaul with High Gain Antennas

Relay aided backhaul has been proposed to meet the challenge of providing Gbps high user rate over long distance (~1 km) in millimeter Wave. Terminals are served by local APs, which are then backhauled through wireless connections to a wired hub. The problem of backhaul topology design and optimal bandwidth-power partitioning has been formulated as a constrained optimization problem. It has been shown that for a linear network deployed along the street at 28 GHz, when high joint directional gain (50 dBi) is available, 1 Gbps user rate within cell range of 1 km can be delivered using 1.5 GHz of BW (without resorting to polarization). The system rates drop precipitously when joint directional gain is reduced, or when the path loss is much more severe as modeled by the 3GPP uMi-NLOS model. (User rate of 300 Mbps is achievable with 1.5 GHz of BW with 40 dBi of joint gain.)