Novel Handover Optimization with a Coordinated Contiguous Carrier Aggregation Deployment Scenario in LTE-Advanced Systems

Table 2

Comparison the proposed NHPO-WPF algorithm with the most HPO related algorithms.

	Algorithm name; (Authers)
	HOP-Dis; (Zhu and Kwak [15])	WPHPO; (Bălan et al. [12, 13])	HPO-FLC; (Munoz et al. [14])	Proposed Algorithm; NHPO-WPF
Optimization methodology	Automatic adjustment based on distance	Automatic adjustment based on HPI	Automatic adjustment based on FLC	Dynamic adjustment based on WPF
Optimization factors	Distance	(i) HFP; (ii) HPPP; (iii) DCP	(i) CDR; (ii) HOR	(i) SINR; (ii) UE’s speed; (iii) Cell load
Optimized HCPs	HOM	(i) HOM; (ii) TTT	(i) Only HOM; (ii) TTT is set to a fixed value	(i) HOM; (ii) TTT
Initial HCPs values	HOM = 2 dB; TTT = 100 ms	HOM = 8 dB; TTT = 160 ms	HOM = 8 dB; TTT = 100 ms	HOM = 2 dB; TTT = 100 ms
Optimization level	Based on distance	HOM = 0.5 dB; TTT = based on 3GPP steps	HOM = 1 dB	(i) HOM = 2 dB; (ii) TTT not fixed
Optimization update time	—	s	s	s
Optimization update process	Performed for all eNBs	Performed for all eNBs	Performed for all eNBs	Performed for each UE individually