# Intelligent Dynamic Power Control with Cell Range Expansion for Small-Cells in 5G HetNets
## 4 Simulation Results
On the other hand, the results of the REP and proposed scheme with/without DPC are higher than those of the conventional scheme. That is, some MUEs that have strong interference from neighboring SBSs are offloaded to SBSs as CUEs using CRE and then the results of the mean MUE capacity increase because MBSs assign subchannels to reduced number of MUEs. As a result, it is shown that the results of both REP and proposed DPC schemes with \(\eta=4\) and \(8\) dB are \(3\%\) and \(4\%\) higher than those of the conventional scheme, respectively. In addition, the results of both REP and proposed DPC schemes with \(\eta=8\) dB are higher than those with \(\eta=4\) dB because the number of CUEs that are offloaded with \(\eta=8\) dB is higher than that with \(\eta=4\) dB. Figure 5: Distribution of MUEs and CUEs based on \(\Gamma_{sth}\) and \(\eta\). Figure 6: Distribution of SUEs and CUEs in SBS as \(\Gamma_{sth}\). Figure 8 shows the results of the mean SUE capacity (including CUEs) as the value of \(\Gamma_{sth}\) increases. The results of the conventional scheme are the highest because SBSs only assign subchannels to their SUEs without considering CUEs. On the other hand, the results of other schemes are lower than the conventional scheme because SBSs assign subchannels to their SUEs and CUEs but CUEs are located in the outer zone with low SINRs in general. Even though the power control is applied, the results of the REP schemes are almost the same regardless of \(\Gamma_{sth}\). The results of the proposed DPC scheme increase as \(\Gamma_{sth}\) increases since the proposed DPC scheme appropriately assigns subchannels with consideration of interference from MBSs and allocates the transmission power for SUEs and CUEs in the inner and outer zones. As a result, the results of the proposed DPC scheme (Prop. DPC) with \(\eta=8\) dB are 43% and 119% higher than the REP schemes when \(\Gamma_{sth}=-15\) and 0 dB, respectively. In addition, the result of the proposed DPC scheme (Prop. DPC) with \(\eta=4\) dB is also 21% and 109% higher than the REP schemes when \(\Gamma_{sth}=-20\) and 0 dB, respectively. Figure 8: Mean SUE capacity (including CUEs) vs. \(\Gamma_{sth}\). Figure 7: Mean MUE capacity vs. \(\Gamma_{sth}\). Figure 9 shows the results of the mean SUE capacity in the inner zone as the value of \(\Gamma_{sth}\) increases. The results of the proposed DPC scheme with \(\eta\) = 4 and 8 dB are the same and increase as \(\Gamma_{sth}\) increases while those of other schemes are almost the same regardless of \(\Gamma_{sth}\). The results of the proposed DPC scheme are lower than those of the REP schemes when \(\Gamma_{sth}<-10\) dB but those are higher than the conventional scheme when \(\Gamma_{sth}\) = 0 dB. That is, the results of the proposed DPC scheme increase since the number of SUEs and CUEs in the inner zone decreases as \(\Gamma_{sth}\) increases and SBSs assign the same subchannels assigned to MBSs to SUEs and CUEs. As a result, the results of the proposed DPC scheme are 9% and 221% higher than those of the REP schemes when \(\Gamma_{sth}\) = \(-10\) dB and 0 dB, respectively. Figure 10 shows the results of the mean SUE capacity in the outer zone as the value of \(\Gamma_{sth}\) increases. The results of the proposed DPC scheme decrease as \(\Gamma_{sth}\) increases while those of other schemes are almost the same regardless of \(\Gamma_{sth}\). It is shown that the DPC in step 2 of the proposed DPC scheme increases the performance of SUEs and CUEs since the results of the proposed DPC scheme with DPC (Prop. DPC) are always higher than those of the proposed DPC scheme (Prop.). In addition, the results of the proposed DPC scheme are always higher than those of the REP schemes but are lower than those of the conventional scheme except the proposed scheme with DPC (Prop. DPC) with \(\eta\) = 8 dB when \(\Gamma_{sth}\) = \(-20\) dB. As a result, the results of the proposed DPC scheme with DPC (Prop.