An example for the throughput cdf of an MN without ICIC in micro cells. The schemes used for MN backhaul is MRC combining with four antennas, and the VPL is at 15 dB. The detailed parameters used for this plot are given in Section 7. The dashed red line is the throughput of the access links. The solid blue line is the throughput of the backhaul links of MNs.