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Title:	Efficient multi-criterion handover decision in LTE-Advanced Heterogeneous Networks
Authors:	Rami Ahmad Alshwaiyat (P77883)
Supervisor:	Elankovan A Sundararajan, Assoc. Prof. Dr.
Keywords:	Network Wireless Handover Computer networks -- Quality control
Issue Date:	31-Jul-2017
Description:	The Heterogeneous Network (HetNet) is considered a promising future solution. This network uses new cells deployment system, which is known as the two-tier LTE-A network. The LTE-A wireless network system depends purely on the Hard Handover (HHO) procedure. HHO is standardized via 3GPP (Release 8 to 13) to allow User Equipment (UE) to migrate among the cells. To trigger the procedure, horizontal and vertical handover decisions typically depend on Received Signal Strength (RSS) and hysteresis parameters. HHO decision reduces wireless network complexity and enhances high-velocity user reliability. However, due to the effect of interference, this scenario could still result in high handover probability and throughput degradation. Interference arises from the high-density femtocells in Received Signal Quality (RSQ). Moreover, other issues also affect handover performance. For example, a long time is needed to select the appropriate target cell. Besides that, due to high mobility, the switching between horizontal/vertical handovers becomes inefficient. The main objective of this research is to propose and implement an efficient handover decision procedure based on users profile in a LTE-A HetNet. Firstly, new multi-criterion handover decision parameters are proposed in typical/dense femtocells in macro-cells and the cell-edge environment. Secondly, the UE Moving Direction and its Informative Historical Handover Decision (MDIH-HD) algorithm is introduced for horizontal networks. This is based on the UE trajectory and the high-mobility UE routine route to estimate the target cell in a short time. Thirdly, the low-mobility UE Moving Direction and Distance Vertical Handover Decision (MDD-VHD) algorithm between the UE and small cells are proposed to estimate the target small cell for handover. Finally, new handover decision parameters are investigated to select their threshold values. The proposed handover algorithms are validated using the LTE-Sim simulators under an urban environment. The simulation results are encouraging. A reduction in the average number of handovers, the average number of signaling measurements, and packet loss and delay was observed. At the same time, the system throughput was increased. The MDIH-HD reduced the handover number, packet delay, and packet loss by 18%, 12%,and 47%, respectively, whereas the system throughput increased by 0.54% and 0.33% compared to conventional and reference algorithms, respectively. Meanwhile, the MDD-VHD reduced the number of handovers, packet delay, and packet loss by 48%,87%, and 82%, respectively. At the same time, the system throughput in the two-tier network increased by 14.3% compared to reference work.,Certification of Master's/Doctoral Thesis" is not available
Pages:	166
Call Number:	TK5102.84.A437 2017 3 tesis
Publisher:	UKM, Bangi
Appears in Collections:	Faculty of Information Science and Technology / Fakulti Teknologi dan Sains Maklumat

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